pax_global_header00006660000000000000000000000064132562563750014530gustar00rootroot0000000000000052 comment=d19c6d0905a2aae9825c0323ffa8d4239f5525ea golang-github-miekg-dns-1.0.4+ds/000077500000000000000000000000001325625637500165375ustar00rootroot00000000000000golang-github-miekg-dns-1.0.4+ds/.codecov.yml000066400000000000000000000002001325625637500207520ustar00rootroot00000000000000coverage: status: project: default: target: 40% threshold: null patch: false changes: false golang-github-miekg-dns-1.0.4+ds/.gitignore000066400000000000000000000000301325625637500205200ustar00rootroot00000000000000*.6 tags test.out a.out golang-github-miekg-dns-1.0.4+ds/.travis.yml000066400000000000000000000006371325625637500206560ustar00rootroot00000000000000language: go sudo: false go: - 1.9.x - tip env: - TESTS="-race -v -bench=. -coverprofile=coverage.txt -covermode=atomic" - TESTS="-race -v ./..." before_install: # don't use the miekg/dns when testing forks - mkdir -p $GOPATH/src/github.com/miekg - ln -s $TRAVIS_BUILD_DIR $GOPATH/src/github.com/miekg/ || true script: - go test $TESTS after_success: - bash <(curl -s https://codecov.io/bash) golang-github-miekg-dns-1.0.4+ds/AUTHORS000066400000000000000000000000331325625637500176030ustar00rootroot00000000000000Miek Gieben golang-github-miekg-dns-1.0.4+ds/CONTRIBUTORS000066400000000000000000000002261325625637500204170ustar00rootroot00000000000000Alex A. Skinner Andrew Tunnell-Jones Ask Bjørn Hansen Dave Cheney Dusty Wilson Marek Majkowski Peter van Dijk Omri Bahumi Alex Sergeyev James Hartig golang-github-miekg-dns-1.0.4+ds/COPYRIGHT000066400000000000000000000010001325625637500200210ustar00rootroot00000000000000Copyright 2009 The Go Authors. All rights reserved. Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. Extensions of the original work are copyright (c) 2011 Miek Gieben Copyright 2011 Miek Gieben. All rights reserved. Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. Copyright 2014 CloudFlare. All rights reserved. Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. golang-github-miekg-dns-1.0.4+ds/Gopkg.lock000066400000000000000000000012131325625637500204550ustar00rootroot00000000000000# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'. [[projects]] branch = "master" name = "golang.org/x/crypto" packages = ["ed25519","ed25519/internal/edwards25519"] revision = "b080dc9a8c480b08e698fb1219160d598526310f" [[projects]] branch = "master" name = "golang.org/x/net" packages = ["bpf","internal/iana","internal/socket","ipv4","ipv6"] revision = "894f8ed5849b15b810ae41e9590a0d05395bba27" [solve-meta] analyzer-name = "dep" analyzer-version = 1 inputs-digest = "c4abc38abaeeeeb9be92455c9c02cae32841122b8982aaa067ef25bb8e86ff9d" solver-name = "gps-cdcl" solver-version = 1 golang-github-miekg-dns-1.0.4+ds/Gopkg.toml000066400000000000000000000011321325625637500205000ustar00rootroot00000000000000 # Gopkg.toml example # # Refer to https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md # for detailed Gopkg.toml documentation. # # required = ["github.com/user/thing/cmd/thing"] # ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"] # # [[constraint]] # name = "github.com/user/project" # version = "1.0.0" # # [[constraint]] # name = "github.com/user/project2" # branch = "dev" # source = "github.com/myfork/project2" # # [[override]] # name = "github.com/x/y" # version = "2.4.0" [[constraint]] branch = "master" name = "golang.org/x/crypto" golang-github-miekg-dns-1.0.4+ds/LICENSE000066400000000000000000000031171325625637500175460ustar00rootroot00000000000000Extensions of the original work are copyright (c) 2011 Miek Gieben As this is fork of the official Go code the same license applies: Copyright (c) 2009 The Go Authors. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of Google Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. golang-github-miekg-dns-1.0.4+ds/Makefile.fuzz000066400000000000000000000012371325625637500211770ustar00rootroot00000000000000# Makefile for fuzzing # # Use go-fuzz and needs the tools installed. # See https://blog.cloudflare.com/dns-parser-meet-go-fuzzer/ # # Installing go-fuzz: # $ make -f Makefile.fuzz get # Installs: # * github.com/dvyukov/go-fuzz/go-fuzz # * get github.com/dvyukov/go-fuzz/go-fuzz-build all: build .PHONY: build build: go-fuzz-build -tags fuzz github.com/miekg/dns .PHONY: build-newrr build-newrr: go-fuzz-build -func FuzzNewRR -tags fuzz github.com/miekg/dns .PHONY: fuzz fuzz: go-fuzz -bin=dns-fuzz.zip -workdir=fuzz .PHONY: get get: go get github.com/dvyukov/go-fuzz/go-fuzz go get github.com/dvyukov/go-fuzz/go-fuzz-build .PHONY: clean clean: rm *-fuzz.zip golang-github-miekg-dns-1.0.4+ds/Makefile.release000066400000000000000000000017401325625637500216200ustar00rootroot00000000000000# Makefile for releasing. # # The release is controlled from version.go. The version found there is # used to tag the git repo, we're not building any artifects so there is nothing # to upload to github. # # * Up the version in version.go # * Run: make -f Makefile.release release # * will *commit* your change with 'Release $VERSION' # * push to github # define GO //+build ignore package main import ( "fmt" "github.com/miekg/dns" ) func main() { fmt.Println(dns.Version.String()) } endef $(file > version_release.go,$(GO)) VERSION:=$(shell go run version_release.go) TAG="v$(VERSION)" all: @echo Use the \'release\' target to start a release $(VERSION) rm -f version_release.go .PHONY: release release: commit push @echo Released $(VERSION) rm -f version_release.go .PHONY: commit commit: @echo Committing release $(VERSION) git commit -am"Release $(VERSION)" git tag $(TAG) .PHONY: push push: @echo Pushing release $(VERSION) to master git push --tags git push golang-github-miekg-dns-1.0.4+ds/README.md000066400000000000000000000125061325625637500200220ustar00rootroot00000000000000[![Build Status](https://travis-ci.org/miekg/dns.svg?branch=master)](https://travis-ci.org/miekg/dns) [![Code Coverage](https://img.shields.io/codecov/c/github/miekg/dns/master.svg)](https://codecov.io/github/miekg/dns?branch=master) [![Go Report Card](https://goreportcard.com/badge/github.com/miekg/dns)](https://goreportcard.com/report/miekg/dns) [![](https://godoc.org/github.com/miekg/dns?status.svg)](https://godoc.org/github.com/miekg/dns) # Alternative (more granular) approach to a DNS library > Less is more. Complete and usable DNS library. All widely used Resource Records are supported, including the DNSSEC types. It follows a lean and mean philosophy. If there is stuff you should know as a DNS programmer there isn't a convenience function for it. Server side and client side programming is supported, i.e. you can build servers and resolvers with it. We try to keep the "master" branch as sane as possible and at the bleeding edge of standards, avoiding breaking changes wherever reasonable. We support the last two versions of Go. # Goals * KISS; * Fast; * Small API. If it's easy to code in Go, don't make a function for it. # Users A not-so-up-to-date-list-that-may-be-actually-current: * https://github.com/coredns/coredns * https://cloudflare.com * https://github.com/abh/geodns * http://www.statdns.com/ * http://www.dnsinspect.com/ * https://github.com/chuangbo/jianbing-dictionary-dns * http://www.dns-lg.com/ * https://github.com/fcambus/rrda * https://github.com/kenshinx/godns * https://github.com/skynetservices/skydns * https://github.com/hashicorp/consul * https://github.com/DevelopersPL/godnsagent * https://github.com/duedil-ltd/discodns * https://github.com/StalkR/dns-reverse-proxy * https://github.com/tianon/rawdns * https://mesosphere.github.io/mesos-dns/ * https://pulse.turbobytes.com/ * https://play.google.com/store/apps/details?id=com.turbobytes.dig * https://github.com/fcambus/statzone * https://github.com/benschw/dns-clb-go * https://github.com/corny/dnscheck for http://public-dns.info/ * https://namesmith.io * https://github.com/miekg/unbound * https://github.com/miekg/exdns * https://dnslookup.org * https://github.com/looterz/grimd * https://github.com/phamhongviet/serf-dns * https://github.com/mehrdadrad/mylg * https://github.com/bamarni/dockness * https://github.com/fffaraz/microdns * http://kelda.io * https://github.com/ipdcode/hades (JD.COM) * https://github.com/StackExchange/dnscontrol/ * https://www.dnsperf.com/ * https://dnssectest.net/ * https://dns.apebits.com * https://github.com/oif/apex * https://github.com/jedisct1/dnscrypt-proxy * https://github.com/jedisct1/rpdns Send pull request if you want to be listed here. # Features * UDP/TCP queries, IPv4 and IPv6; * RFC 1035 zone file parsing ($INCLUDE, $ORIGIN, $TTL and $GENERATE (for all record types) are supported; * Fast: * Reply speed around ~ 80K qps (faster hardware results in more qps); * Parsing RRs ~ 100K RR/s, that's 5M records in about 50 seconds; * Server side programming (mimicking the net/http package); * Client side programming; * DNSSEC: signing, validating and key generation for DSA, RSA, ECDSA and Ed25519; * EDNS0, NSID, Cookies; * AXFR/IXFR; * TSIG, SIG(0); * DNS over TLS: optional encrypted connection between client and server; * DNS name compression; * Depends only on the standard library. Have fun! Miek Gieben - 2010-2012 - # Building Building is done with the `go` tool. If you have setup your GOPATH correctly, the following should work: go get github.com/miekg/dns go build github.com/miekg/dns ## Examples A short "how to use the API" is at the beginning of doc.go (this also will show when you call `godoc github.com/miekg/dns`). Example programs can be found in the `github.com/miekg/exdns` repository. ## Supported RFCs *all of them* * 103{4,5} - DNS standard * 1348 - NSAP record (removed the record) * 1982 - Serial Arithmetic * 1876 - LOC record * 1995 - IXFR * 1996 - DNS notify * 2136 - DNS Update (dynamic updates) * 2181 - RRset definition - there is no RRset type though, just []RR * 2537 - RSAMD5 DNS keys * 2065 - DNSSEC (updated in later RFCs) * 2671 - EDNS record * 2782 - SRV record * 2845 - TSIG record * 2915 - NAPTR record * 2929 - DNS IANA Considerations * 3110 - RSASHA1 DNS keys * 3225 - DO bit (DNSSEC OK) * 340{1,2,3} - NAPTR record * 3445 - Limiting the scope of (DNS)KEY * 3597 - Unknown RRs * 403{3,4,5} - DNSSEC + validation functions * 4255 - SSHFP record * 4343 - Case insensitivity * 4408 - SPF record * 4509 - SHA256 Hash in DS * 4592 - Wildcards in the DNS * 4635 - HMAC SHA TSIG * 4701 - DHCID * 4892 - id.server * 5001 - NSID * 5155 - NSEC3 record * 5205 - HIP record * 5702 - SHA2 in the DNS * 5936 - AXFR * 5966 - TCP implementation recommendations * 6605 - ECDSA * 6725 - IANA Registry Update * 6742 - ILNP DNS * 6840 - Clarifications and Implementation Notes for DNS Security * 6844 - CAA record * 6891 - EDNS0 update * 6895 - DNS IANA considerations * 6975 - Algorithm Understanding in DNSSEC * 7043 - EUI48/EUI64 records * 7314 - DNS (EDNS) EXPIRE Option * 7477 - CSYNC RR * 7828 - edns-tcp-keepalive EDNS0 Option * 7553 - URI record * 7858 - DNS over TLS: Initiation and Performance Considerations * 7871 - EDNS0 Client Subnet * 7873 - Domain Name System (DNS) Cookies (draft-ietf-dnsop-cookies) * 8080 - EdDSA for DNSSEC ## Loosely based upon * `ldns` * `NSD` * `Net::DNS` * `GRONG` golang-github-miekg-dns-1.0.4+ds/client.go000066400000000000000000000336611325625637500203550ustar00rootroot00000000000000package dns // A client implementation. import ( "bytes" "context" "crypto/tls" "encoding/binary" "io" "net" "strings" "time" ) const dnsTimeout time.Duration = 2 * time.Second const tcpIdleTimeout time.Duration = 8 * time.Second // A Conn represents a connection to a DNS server. type Conn struct { net.Conn // a net.Conn holding the connection UDPSize uint16 // minimum receive buffer for UDP messages TsigSecret map[string]string // secret(s) for Tsig map[], zonename must be in canonical form (lowercase, fqdn, see RFC 4034 Section 6.2) rtt time.Duration t time.Time tsigRequestMAC string } // A Client defines parameters for a DNS client. type Client struct { Net string // if "tcp" or "tcp-tls" (DNS over TLS) a TCP query will be initiated, otherwise an UDP one (default is "" for UDP) UDPSize uint16 // minimum receive buffer for UDP messages TLSConfig *tls.Config // TLS connection configuration Dialer *net.Dialer // a net.Dialer used to set local address, timeouts and more // Timeout is a cumulative timeout for dial, write and read, defaults to 0 (disabled) - overrides DialTimeout, ReadTimeout, // WriteTimeout when non-zero. Can be overridden with net.Dialer.Timeout (see Client.ExchangeWithDialer and // Client.Dialer) or context.Context.Deadline (see the deprecated ExchangeContext) Timeout time.Duration DialTimeout time.Duration // net.DialTimeout, defaults to 2 seconds, or net.Dialer.Timeout if expiring earlier - overridden by Timeout when that value is non-zero ReadTimeout time.Duration // net.Conn.SetReadTimeout value for connections, defaults to 2 seconds - overridden by Timeout when that value is non-zero WriteTimeout time.Duration // net.Conn.SetWriteTimeout value for connections, defaults to 2 seconds - overridden by Timeout when that value is non-zero TsigSecret map[string]string // secret(s) for Tsig map[], zonename must be in canonical form (lowercase, fqdn, see RFC 4034 Section 6.2) SingleInflight bool // if true suppress multiple outstanding queries for the same Qname, Qtype and Qclass group singleflight } // Exchange performs a synchronous UDP query. It sends the message m to the address // contained in a and waits for a reply. Exchange does not retry a failed query, nor // will it fall back to TCP in case of truncation. // See client.Exchange for more information on setting larger buffer sizes. func Exchange(m *Msg, a string) (r *Msg, err error) { client := Client{Net: "udp"} r, _, err = client.Exchange(m, a) return r, err } func (c *Client) dialTimeout() time.Duration { if c.Timeout != 0 { return c.Timeout } if c.DialTimeout != 0 { return c.DialTimeout } return dnsTimeout } func (c *Client) readTimeout() time.Duration { if c.ReadTimeout != 0 { return c.ReadTimeout } return dnsTimeout } func (c *Client) writeTimeout() time.Duration { if c.WriteTimeout != 0 { return c.WriteTimeout } return dnsTimeout } // Dial connects to the address on the named network. func (c *Client) Dial(address string) (conn *Conn, err error) { // create a new dialer with the appropriate timeout var d net.Dialer if c.Dialer == nil { d = net.Dialer{} } else { d = net.Dialer(*c.Dialer) } d.Timeout = c.getTimeoutForRequest(c.writeTimeout()) network := "udp" useTLS := false switch c.Net { case "tcp-tls": network = "tcp" useTLS = true case "tcp4-tls": network = "tcp4" useTLS = true case "tcp6-tls": network = "tcp6" useTLS = true default: if c.Net != "" { network = c.Net } } conn = new(Conn) if useTLS { conn.Conn, err = tls.DialWithDialer(&d, network, address, c.TLSConfig) } else { conn.Conn, err = d.Dial(network, address) } if err != nil { return nil, err } return conn, nil } // Exchange performs a synchronous query. It sends the message m to the address // contained in a and waits for a reply. Basic use pattern with a *dns.Client: // // c := new(dns.Client) // in, rtt, err := c.Exchange(message, "127.0.0.1:53") // // Exchange does not retry a failed query, nor will it fall back to TCP in // case of truncation. // It is up to the caller to create a message that allows for larger responses to be // returned. Specifically this means adding an EDNS0 OPT RR that will advertise a larger // buffer, see SetEdns0. Messages without an OPT RR will fallback to the historic limit // of 512 bytes // To specify a local address or a timeout, the caller has to set the `Client.Dialer` // attribute appropriately func (c *Client) Exchange(m *Msg, address string) (r *Msg, rtt time.Duration, err error) { if !c.SingleInflight { return c.exchange(m, address) } t := "nop" if t1, ok := TypeToString[m.Question[0].Qtype]; ok { t = t1 } cl := "nop" if cl1, ok := ClassToString[m.Question[0].Qclass]; ok { cl = cl1 } r, rtt, err, shared := c.group.Do(m.Question[0].Name+t+cl, func() (*Msg, time.Duration, error) { return c.exchange(m, address) }) if r != nil && shared { r = r.Copy() } return r, rtt, err } func (c *Client) exchange(m *Msg, a string) (r *Msg, rtt time.Duration, err error) { var co *Conn co, err = c.Dial(a) if err != nil { return nil, 0, err } defer co.Close() opt := m.IsEdns0() // If EDNS0 is used use that for size. if opt != nil && opt.UDPSize() >= MinMsgSize { co.UDPSize = opt.UDPSize() } // Otherwise use the client's configured UDP size. if opt == nil && c.UDPSize >= MinMsgSize { co.UDPSize = c.UDPSize } co.TsigSecret = c.TsigSecret // write with the appropriate write timeout co.SetWriteDeadline(time.Now().Add(c.getTimeoutForRequest(c.writeTimeout()))) if err = co.WriteMsg(m); err != nil { return nil, 0, err } co.SetReadDeadline(time.Now().Add(c.getTimeoutForRequest(c.readTimeout()))) r, err = co.ReadMsg() if err == nil && r.Id != m.Id { err = ErrId } return r, co.rtt, err } // ReadMsg reads a message from the connection co. // If the received message contains a TSIG record the transaction signature // is verified. This method always tries to return the message, however if an // error is returned there are no guarantees that the returned message is a // valid representation of the packet read. func (co *Conn) ReadMsg() (*Msg, error) { p, err := co.ReadMsgHeader(nil) if err != nil { return nil, err } m := new(Msg) if err := m.Unpack(p); err != nil { // If an error was returned, we still want to allow the user to use // the message, but naively they can just check err if they don't want // to use an erroneous message return m, err } if t := m.IsTsig(); t != nil { if _, ok := co.TsigSecret[t.Hdr.Name]; !ok { return m, ErrSecret } // Need to work on the original message p, as that was used to calculate the tsig. err = TsigVerify(p, co.TsigSecret[t.Hdr.Name], co.tsigRequestMAC, false) } return m, err } // ReadMsgHeader reads a DNS message, parses and populates hdr (when hdr is not nil). // Returns message as a byte slice to be parsed with Msg.Unpack later on. // Note that error handling on the message body is not possible as only the header is parsed. func (co *Conn) ReadMsgHeader(hdr *Header) ([]byte, error) { var ( p []byte n int err error ) switch t := co.Conn.(type) { case *net.TCPConn, *tls.Conn: r := t.(io.Reader) // First two bytes specify the length of the entire message. l, err := tcpMsgLen(r) if err != nil { return nil, err } p = make([]byte, l) n, err = tcpRead(r, p) co.rtt = time.Since(co.t) default: if co.UDPSize > MinMsgSize { p = make([]byte, co.UDPSize) } else { p = make([]byte, MinMsgSize) } n, err = co.Read(p) co.rtt = time.Since(co.t) } if err != nil { return nil, err } else if n < headerSize { return nil, ErrShortRead } p = p[:n] if hdr != nil { dh, _, err := unpackMsgHdr(p, 0) if err != nil { return nil, err } *hdr = dh } return p, err } // tcpMsgLen is a helper func to read first two bytes of stream as uint16 packet length. func tcpMsgLen(t io.Reader) (int, error) { p := []byte{0, 0} n, err := t.Read(p) if err != nil { return 0, err } // As seen with my local router/switch, returns 1 byte on the above read, // resulting a a ShortRead. Just write it out (instead of loop) and read the // other byte. if n == 1 { n1, err := t.Read(p[1:]) if err != nil { return 0, err } n += n1 } if n != 2 { return 0, ErrShortRead } l := binary.BigEndian.Uint16(p) if l == 0 { return 0, ErrShortRead } return int(l), nil } // tcpRead calls TCPConn.Read enough times to fill allocated buffer. func tcpRead(t io.Reader, p []byte) (int, error) { n, err := t.Read(p) if err != nil { return n, err } for n < len(p) { j, err := t.Read(p[n:]) if err != nil { return n, err } n += j } return n, err } // Read implements the net.Conn read method. func (co *Conn) Read(p []byte) (n int, err error) { if co.Conn == nil { return 0, ErrConnEmpty } if len(p) < 2 { return 0, io.ErrShortBuffer } switch t := co.Conn.(type) { case *net.TCPConn, *tls.Conn: r := t.(io.Reader) l, err := tcpMsgLen(r) if err != nil { return 0, err } if l > len(p) { return int(l), io.ErrShortBuffer } return tcpRead(r, p[:l]) } // UDP connection n, err = co.Conn.Read(p) if err != nil { return n, err } return n, err } // WriteMsg sends a message through the connection co. // If the message m contains a TSIG record the transaction // signature is calculated. func (co *Conn) WriteMsg(m *Msg) (err error) { var out []byte if t := m.IsTsig(); t != nil { mac := "" if _, ok := co.TsigSecret[t.Hdr.Name]; !ok { return ErrSecret } out, mac, err = TsigGenerate(m, co.TsigSecret[t.Hdr.Name], co.tsigRequestMAC, false) // Set for the next read, although only used in zone transfers co.tsigRequestMAC = mac } else { out, err = m.Pack() } if err != nil { return err } co.t = time.Now() if _, err = co.Write(out); err != nil { return err } return nil } // Write implements the net.Conn Write method. func (co *Conn) Write(p []byte) (n int, err error) { switch t := co.Conn.(type) { case *net.TCPConn, *tls.Conn: w := t.(io.Writer) lp := len(p) if lp < 2 { return 0, io.ErrShortBuffer } if lp > MaxMsgSize { return 0, &Error{err: "message too large"} } l := make([]byte, 2, lp+2) binary.BigEndian.PutUint16(l, uint16(lp)) p = append(l, p...) n, err := io.Copy(w, bytes.NewReader(p)) return int(n), err } n, err = co.Conn.Write(p) return n, err } // Return the appropriate timeout for a specific request func (c *Client) getTimeoutForRequest(timeout time.Duration) time.Duration { var requestTimeout time.Duration if c.Timeout != 0 { requestTimeout = c.Timeout } else { requestTimeout = timeout } // net.Dialer.Timeout has priority if smaller than the timeouts computed so // far if c.Dialer != nil && c.Dialer.Timeout != 0 { if c.Dialer.Timeout < requestTimeout { requestTimeout = c.Dialer.Timeout } } return requestTimeout } // Dial connects to the address on the named network. func Dial(network, address string) (conn *Conn, err error) { conn = new(Conn) conn.Conn, err = net.Dial(network, address) if err != nil { return nil, err } return conn, nil } // ExchangeContext performs a synchronous UDP query, like Exchange. It // additionally obeys deadlines from the passed Context. func ExchangeContext(ctx context.Context, m *Msg, a string) (r *Msg, err error) { client := Client{Net: "udp"} r, _, err = client.ExchangeContext(ctx, m, a) // ignorint rtt to leave the original ExchangeContext API unchanged, but // this function will go away return r, err } // ExchangeConn performs a synchronous query. It sends the message m via the connection // c and waits for a reply. The connection c is not closed by ExchangeConn. // This function is going away, but can easily be mimicked: // // co := &dns.Conn{Conn: c} // c is your net.Conn // co.WriteMsg(m) // in, _ := co.ReadMsg() // co.Close() // func ExchangeConn(c net.Conn, m *Msg) (r *Msg, err error) { println("dns: ExchangeConn: this function is deprecated") co := new(Conn) co.Conn = c if err = co.WriteMsg(m); err != nil { return nil, err } r, err = co.ReadMsg() if err == nil && r.Id != m.Id { err = ErrId } return r, err } // DialTimeout acts like Dial but takes a timeout. func DialTimeout(network, address string, timeout time.Duration) (conn *Conn, err error) { client := Client{Net: network, Dialer: &net.Dialer{Timeout: timeout}} conn, err = client.Dial(address) if err != nil { return nil, err } return conn, nil } // DialWithTLS connects to the address on the named network with TLS. func DialWithTLS(network, address string, tlsConfig *tls.Config) (conn *Conn, err error) { if !strings.HasSuffix(network, "-tls") { network += "-tls" } client := Client{Net: network, TLSConfig: tlsConfig} conn, err = client.Dial(address) if err != nil { return nil, err } return conn, nil } // DialTimeoutWithTLS acts like DialWithTLS but takes a timeout. func DialTimeoutWithTLS(network, address string, tlsConfig *tls.Config, timeout time.Duration) (conn *Conn, err error) { if !strings.HasSuffix(network, "-tls") { network += "-tls" } client := Client{Net: network, Dialer: &net.Dialer{Timeout: timeout}, TLSConfig: tlsConfig} conn, err = client.Dial(address) if err != nil { return nil, err } return conn, nil } // ExchangeContext acts like Exchange, but honors the deadline on the provided // context, if present. If there is both a context deadline and a configured // timeout on the client, the earliest of the two takes effect. func (c *Client) ExchangeContext(ctx context.Context, m *Msg, a string) (r *Msg, rtt time.Duration, err error) { var timeout time.Duration if deadline, ok := ctx.Deadline(); !ok { timeout = 0 } else { timeout = deadline.Sub(time.Now()) } // not passing the context to the underlying calls, as the API does not support // context. For timeouts you should set up Client.Dialer and call Client.Exchange. c.Dialer = &net.Dialer{Timeout: timeout} return c.Exchange(m, a) } golang-github-miekg-dns-1.0.4+ds/client_test.go000066400000000000000000000337511325625637500214140ustar00rootroot00000000000000package dns import ( "context" "crypto/tls" "fmt" "net" "strconv" "strings" "sync" "testing" "time" ) func TestDialUDP(t *testing.T) { HandleFunc("miek.nl.", HelloServer) defer HandleRemove("miek.nl.") s, addrstr, err := RunLocalUDPServer(":0") if err != nil { t.Fatalf("unable to run test server: %v", err) } defer s.Shutdown() m := new(Msg) m.SetQuestion("miek.nl.", TypeSOA) c := new(Client) conn, err := c.Dial(addrstr) if err != nil { t.Fatalf("failed to dial: %v", err) } if conn == nil { t.Fatalf("conn is nil") } } func TestClientSync(t *testing.T) { HandleFunc("miek.nl.", HelloServer) defer HandleRemove("miek.nl.") s, addrstr, err := RunLocalUDPServer(":0") if err != nil { t.Fatalf("unable to run test server: %v", err) } defer s.Shutdown() m := new(Msg) m.SetQuestion("miek.nl.", TypeSOA) c := new(Client) r, _, err := c.Exchange(m, addrstr) if err != nil { t.Fatalf("failed to exchange: %v", err) } if r == nil { t.Fatal("response is nil") } if r.Rcode != RcodeSuccess { t.Errorf("failed to get an valid answer\n%v", r) } // And now with plain Exchange(). r, err = Exchange(m, addrstr) if err != nil { t.Errorf("failed to exchange: %v", err) } if r == nil || r.Rcode != RcodeSuccess { t.Errorf("failed to get an valid answer\n%v", r) } } func TestClientLocalAddress(t *testing.T) { HandleFunc("miek.nl.", HelloServerEchoAddrPort) defer HandleRemove("miek.nl.") s, addrstr, err := RunLocalUDPServer(":0") if err != nil { t.Fatalf("unable to run test server: %v", err) } defer s.Shutdown() m := new(Msg) m.SetQuestion("miek.nl.", TypeSOA) c := new(Client) laddr := net.UDPAddr{IP: net.ParseIP("0.0.0.0"), Port: 12345, Zone: ""} c.Dialer = &net.Dialer{LocalAddr: &laddr} r, _, err := c.Exchange(m, addrstr) if err != nil { t.Fatalf("failed to exchange: %v", err) } if r != nil && r.Rcode != RcodeSuccess { t.Errorf("failed to get an valid answer\n%v", r) } if len(r.Extra) != 1 { t.Errorf("failed to get additional answers\n%v", r) } txt := r.Extra[0].(*TXT) if txt == nil { t.Errorf("invalid TXT response\n%v", txt) } if len(txt.Txt) != 1 || !strings.Contains(txt.Txt[0], ":12345") { t.Errorf("invalid TXT response\n%v", txt.Txt) } } func TestClientTLSSyncV4(t *testing.T) { HandleFunc("miek.nl.", HelloServer) defer HandleRemove("miek.nl.") cert, err := tls.X509KeyPair(CertPEMBlock, KeyPEMBlock) if err != nil { t.Fatalf("unable to build certificate: %v", err) } config := tls.Config{ Certificates: []tls.Certificate{cert}, } s, addrstr, err := RunLocalTLSServer(":0", &config) if err != nil { t.Fatalf("unable to run test server: %v", err) } defer s.Shutdown() m := new(Msg) m.SetQuestion("miek.nl.", TypeSOA) c := new(Client) // test tcp-tls c.Net = "tcp-tls" c.TLSConfig = &tls.Config{ InsecureSkipVerify: true, } r, _, err := c.Exchange(m, addrstr) if err != nil { t.Fatalf("failed to exchange: %v", err) } if r == nil { t.Fatal("response is nil") } if r.Rcode != RcodeSuccess { t.Errorf("failed to get an valid answer\n%v", r) } // test tcp4-tls c.Net = "tcp4-tls" c.TLSConfig = &tls.Config{ InsecureSkipVerify: true, } r, _, err = c.Exchange(m, addrstr) if err != nil { t.Fatalf("failed to exchange: %v", err) } if r == nil { t.Fatal("response is nil") } if r.Rcode != RcodeSuccess { t.Errorf("failed to get an valid answer\n%v", r) } } func TestClientSyncBadID(t *testing.T) { HandleFunc("miek.nl.", HelloServerBadID) defer HandleRemove("miek.nl.") s, addrstr, err := RunLocalUDPServer(":0") if err != nil { t.Fatalf("unable to run test server: %v", err) } defer s.Shutdown() m := new(Msg) m.SetQuestion("miek.nl.", TypeSOA) c := new(Client) if _, _, err := c.Exchange(m, addrstr); err != ErrId { t.Errorf("did not find a bad Id") } // And now with plain Exchange(). if _, err := Exchange(m, addrstr); err != ErrId { t.Errorf("did not find a bad Id") } } func TestClientEDNS0(t *testing.T) { HandleFunc("miek.nl.", HelloServer) defer HandleRemove("miek.nl.") s, addrstr, err := RunLocalUDPServer(":0") if err != nil { t.Fatalf("unable to run test server: %v", err) } defer s.Shutdown() m := new(Msg) m.SetQuestion("miek.nl.", TypeDNSKEY) m.SetEdns0(2048, true) c := new(Client) r, _, err := c.Exchange(m, addrstr) if err != nil { t.Fatalf("failed to exchange: %v", err) } if r != nil && r.Rcode != RcodeSuccess { t.Errorf("failed to get a valid answer\n%v", r) } } // Validates the transmission and parsing of local EDNS0 options. func TestClientEDNS0Local(t *testing.T) { optStr1 := "1979:0x0707" optStr2 := strconv.Itoa(EDNS0LOCALSTART) + ":0x0601" handler := func(w ResponseWriter, req *Msg) { m := new(Msg) m.SetReply(req) m.Extra = make([]RR, 1, 2) m.Extra[0] = &TXT{Hdr: RR_Header{Name: m.Question[0].Name, Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}, Txt: []string{"Hello local edns"}} // If the local options are what we expect, then reflect them back. ec1 := req.Extra[0].(*OPT).Option[0].(*EDNS0_LOCAL).String() ec2 := req.Extra[0].(*OPT).Option[1].(*EDNS0_LOCAL).String() if ec1 == optStr1 && ec2 == optStr2 { m.Extra = append(m.Extra, req.Extra[0]) } w.WriteMsg(m) } HandleFunc("miek.nl.", handler) defer HandleRemove("miek.nl.") s, addrstr, err := RunLocalUDPServer(":0") if err != nil { t.Fatalf("unable to run test server: %s", err) } defer s.Shutdown() m := new(Msg) m.SetQuestion("miek.nl.", TypeTXT) // Add two local edns options to the query. ec1 := &EDNS0_LOCAL{Code: 1979, Data: []byte{7, 7}} ec2 := &EDNS0_LOCAL{Code: EDNS0LOCALSTART, Data: []byte{6, 1}} o := &OPT{Hdr: RR_Header{Name: ".", Rrtype: TypeOPT}, Option: []EDNS0{ec1, ec2}} m.Extra = append(m.Extra, o) c := new(Client) r, _, err := c.Exchange(m, addrstr) if err != nil { t.Fatalf("failed to exchange: %s", err) } if r == nil { t.Fatal("response is nil") } if r.Rcode != RcodeSuccess { t.Fatal("failed to get a valid answer") } txt := r.Extra[0].(*TXT).Txt[0] if txt != "Hello local edns" { t.Error("Unexpected result for miek.nl", txt, "!= Hello local edns") } // Validate the local options in the reply. got := r.Extra[1].(*OPT).Option[0].(*EDNS0_LOCAL).String() if got != optStr1 { t.Errorf("failed to get local edns0 answer; got %s, expected %s", got, optStr1) } got = r.Extra[1].(*OPT).Option[1].(*EDNS0_LOCAL).String() if got != optStr2 { t.Errorf("failed to get local edns0 answer; got %s, expected %s", got, optStr2) } } func TestClientConn(t *testing.T) { HandleFunc("miek.nl.", HelloServer) defer HandleRemove("miek.nl.") // This uses TCP just to make it slightly different than TestClientSync s, addrstr, err := RunLocalTCPServer(":0") if err != nil { t.Fatalf("unable to run test server: %v", err) } defer s.Shutdown() m := new(Msg) m.SetQuestion("miek.nl.", TypeSOA) cn, err := Dial("tcp", addrstr) if err != nil { t.Errorf("failed to dial %s: %v", addrstr, err) } err = cn.WriteMsg(m) if err != nil { t.Errorf("failed to exchange: %v", err) } r, err := cn.ReadMsg() if err != nil { t.Errorf("failed to get a valid answer: %v", err) } if r == nil || r.Rcode != RcodeSuccess { t.Errorf("failed to get an valid answer\n%v", r) } err = cn.WriteMsg(m) if err != nil { t.Errorf("failed to exchange: %v", err) } h := new(Header) buf, err := cn.ReadMsgHeader(h) if buf == nil { t.Errorf("failed to get an valid answer\n%v", r) } if err != nil { t.Errorf("failed to get a valid answer: %v", err) } if int(h.Bits&0xF) != RcodeSuccess { t.Errorf("failed to get an valid answer in ReadMsgHeader\n%v", r) } if h.Ancount != 0 || h.Qdcount != 1 || h.Nscount != 0 || h.Arcount != 1 { t.Errorf("expected to have question and additional in response; got something else: %+v", h) } if err = r.Unpack(buf); err != nil { t.Errorf("unable to unpack message fully: %v", err) } } func TestTruncatedMsg(t *testing.T) { m := new(Msg) m.SetQuestion("miek.nl.", TypeSRV) cnt := 10 for i := 0; i < cnt; i++ { r := &SRV{ Hdr: RR_Header{Name: m.Question[0].Name, Rrtype: TypeSRV, Class: ClassINET, Ttl: 0}, Port: uint16(i + 8000), Target: "target.miek.nl.", } m.Answer = append(m.Answer, r) re := &A{ Hdr: RR_Header{Name: m.Question[0].Name, Rrtype: TypeA, Class: ClassINET, Ttl: 0}, A: net.ParseIP(fmt.Sprintf("127.0.0.%d", i)).To4(), } m.Extra = append(m.Extra, re) } buf, err := m.Pack() if err != nil { t.Errorf("failed to pack: %v", err) } r := new(Msg) if err = r.Unpack(buf); err != nil { t.Errorf("unable to unpack message: %v", err) } if len(r.Answer) != cnt { t.Errorf("answer count after regular unpack doesn't match: %d", len(r.Answer)) } if len(r.Extra) != cnt { t.Errorf("extra count after regular unpack doesn't match: %d", len(r.Extra)) } m.Truncated = true buf, err = m.Pack() if err != nil { t.Errorf("failed to pack truncated: %v", err) } r = new(Msg) if err = r.Unpack(buf); err != nil && err != ErrTruncated { t.Errorf("unable to unpack truncated message: %v", err) } if !r.Truncated { t.Errorf("truncated message wasn't unpacked as truncated") } if len(r.Answer) != cnt { t.Errorf("answer count after truncated unpack doesn't match: %d", len(r.Answer)) } if len(r.Extra) != cnt { t.Errorf("extra count after truncated unpack doesn't match: %d", len(r.Extra)) } // Now we want to remove almost all of the extra records // We're going to loop over the extra to get the count of the size of all // of them off := 0 buf1 := make([]byte, m.Len()) for i := 0; i < len(m.Extra); i++ { off, err = PackRR(m.Extra[i], buf1, off, nil, m.Compress) if err != nil { t.Errorf("failed to pack extra: %v", err) } } // Remove all of the extra bytes but 10 bytes from the end of buf off -= 10 buf1 = buf[:len(buf)-off] r = new(Msg) if err = r.Unpack(buf1); err != nil && err != ErrTruncated { t.Errorf("unable to unpack cutoff message: %v", err) } if !r.Truncated { t.Error("truncated cutoff message wasn't unpacked as truncated") } if len(r.Answer) != cnt { t.Errorf("answer count after cutoff unpack doesn't match: %d", len(r.Answer)) } if len(r.Extra) != 0 { t.Errorf("extra count after cutoff unpack is not zero: %d", len(r.Extra)) } // Now we want to remove almost all of the answer records too buf1 = make([]byte, m.Len()) as := 0 for i := 0; i < len(m.Extra); i++ { off1 := off off, err = PackRR(m.Extra[i], buf1, off, nil, m.Compress) as = off - off1 if err != nil { t.Errorf("failed to pack extra: %v", err) } } // Keep exactly one answer left // This should still cause Answer to be nil off -= as buf1 = buf[:len(buf)-off] r = new(Msg) if err = r.Unpack(buf1); err != nil && err != ErrTruncated { t.Errorf("unable to unpack cutoff message: %v", err) } if !r.Truncated { t.Error("truncated cutoff message wasn't unpacked as truncated") } if len(r.Answer) != 0 { t.Errorf("answer count after second cutoff unpack is not zero: %d", len(r.Answer)) } // Now leave only 1 byte of the question // Since the header is always 12 bytes, we just need to keep 13 buf1 = buf[:13] r = new(Msg) err = r.Unpack(buf1) if err == nil || err == ErrTruncated { t.Errorf("error should not be ErrTruncated from question cutoff unpack: %v", err) } // Finally, if we only have the header, we don't return an error. buf1 = buf[:12] r = new(Msg) if err = r.Unpack(buf1); err != nil { t.Errorf("from header-only unpack should not return an error: %v", err) } } func TestTimeout(t *testing.T) { // Set up a dummy UDP server that won't respond addr, err := net.ResolveUDPAddr("udp", ":0") if err != nil { t.Fatalf("unable to resolve local udp address: %v", err) } conn, err := net.ListenUDP("udp", addr) if err != nil { t.Fatalf("unable to run test server: %v", err) } defer conn.Close() addrstr := conn.LocalAddr().String() // Message to send m := new(Msg) m.SetQuestion("miek.nl.", TypeTXT) // Use a channel + timeout to ensure we don't get stuck if the // Client Timeout is not working properly done := make(chan struct{}, 2) timeout := time.Millisecond allowable := timeout + (10 * time.Millisecond) abortAfter := timeout + (100 * time.Millisecond) start := time.Now() go func() { c := &Client{Timeout: timeout} _, _, err := c.Exchange(m, addrstr) if err == nil { t.Error("no timeout using Client.Exchange") } done <- struct{}{} }() go func() { ctx, cancel := context.WithTimeout(context.Background(), timeout) defer cancel() c := &Client{} _, _, err := c.ExchangeContext(ctx, m, addrstr) if err == nil { t.Error("no timeout using Client.ExchangeContext") } done <- struct{}{} }() // Wait for both the Exchange and ExchangeContext tests to be done. for i := 0; i < 2; i++ { select { case <-done: case <-time.After(abortAfter): } } length := time.Since(start) if length > allowable { t.Errorf("exchange took longer %v than specified Timeout %v", length, allowable) } } // Check that responses from deduplicated requests aren't shared between callers func TestConcurrentExchanges(t *testing.T) { cases := make([]*Msg, 2) cases[0] = new(Msg) cases[1] = new(Msg) cases[1].Truncated = true for _, m := range cases { block := make(chan struct{}) waiting := make(chan struct{}) handler := func(w ResponseWriter, req *Msg) { r := m.Copy() r.SetReply(req) waiting <- struct{}{} <-block w.WriteMsg(r) } HandleFunc("miek.nl.", handler) defer HandleRemove("miek.nl.") s, addrstr, err := RunLocalUDPServer(":0") if err != nil { t.Fatalf("unable to run test server: %s", err) } defer s.Shutdown() m := new(Msg) m.SetQuestion("miek.nl.", TypeSRV) c := &Client{ SingleInflight: true, } r := make([]*Msg, 2) var wg sync.WaitGroup wg.Add(len(r)) for i := 0; i < len(r); i++ { go func(i int) { defer wg.Done() r[i], _, _ = c.Exchange(m.Copy(), addrstr) if r[i] == nil { t.Errorf("response %d is nil", i) } }(i) } select { case <-waiting: case <-time.After(time.Second): t.FailNow() } close(block) wg.Wait() if r[0] == r[1] { t.Errorf("got same response, expected non-shared responses") } } } golang-github-miekg-dns-1.0.4+ds/clientconfig.go000066400000000000000000000066041325625637500215400ustar00rootroot00000000000000package dns import ( "bufio" "io" "os" "strconv" "strings" ) // ClientConfig wraps the contents of the /etc/resolv.conf file. type ClientConfig struct { Servers []string // servers to use Search []string // suffixes to append to local name Port string // what port to use Ndots int // number of dots in name to trigger absolute lookup Timeout int // seconds before giving up on packet Attempts int // lost packets before giving up on server, not used in the package dns } // ClientConfigFromFile parses a resolv.conf(5) like file and returns // a *ClientConfig. func ClientConfigFromFile(resolvconf string) (*ClientConfig, error) { file, err := os.Open(resolvconf) if err != nil { return nil, err } defer file.Close() return ClientConfigFromReader(file) } // ClientConfigFromReader works like ClientConfigFromFile but takes an io.Reader as argument func ClientConfigFromReader(resolvconf io.Reader) (*ClientConfig, error) { c := new(ClientConfig) scanner := bufio.NewScanner(resolvconf) c.Servers = make([]string, 0) c.Search = make([]string, 0) c.Port = "53" c.Ndots = 1 c.Timeout = 5 c.Attempts = 2 for scanner.Scan() { if err := scanner.Err(); err != nil { return nil, err } line := scanner.Text() f := strings.Fields(line) if len(f) < 1 { continue } switch f[0] { case "nameserver": // add one name server if len(f) > 1 { // One more check: make sure server name is // just an IP address. Otherwise we need DNS // to look it up. name := f[1] c.Servers = append(c.Servers, name) } case "domain": // set search path to just this domain if len(f) > 1 { c.Search = make([]string, 1) c.Search[0] = f[1] } else { c.Search = make([]string, 0) } case "search": // set search path to given servers c.Search = make([]string, len(f)-1) for i := 0; i < len(c.Search); i++ { c.Search[i] = f[i+1] } case "options": // magic options for i := 1; i < len(f); i++ { s := f[i] switch { case len(s) >= 6 && s[:6] == "ndots:": n, _ := strconv.Atoi(s[6:]) if n < 0 { n = 0 } else if n > 15 { n = 15 } c.Ndots = n case len(s) >= 8 && s[:8] == "timeout:": n, _ := strconv.Atoi(s[8:]) if n < 1 { n = 1 } c.Timeout = n case len(s) >= 8 && s[:9] == "attempts:": n, _ := strconv.Atoi(s[9:]) if n < 1 { n = 1 } c.Attempts = n case s == "rotate": /* not imp */ } } } } return c, nil } // NameList returns all of the names that should be queried based on the // config. It is based off of go's net/dns name building, but it does not // check the length of the resulting names. func (c *ClientConfig) NameList(name string) []string { // if this domain is already fully qualified, no append needed. if IsFqdn(name) { return []string{name} } // Check to see if the name has more labels than Ndots. Do this before making // the domain fully qualified. hasNdots := CountLabel(name) > c.Ndots // Make the domain fully qualified. name = Fqdn(name) // Make a list of names based off search. names := []string{} // If name has enough dots, try that first. if hasNdots { names = append(names, name) } for _, s := range c.Search { names = append(names, Fqdn(name+s)) } // If we didn't have enough dots, try after suffixes. if !hasNdots { names = append(names, name) } return names } golang-github-miekg-dns-1.0.4+ds/clientconfig_test.go000066400000000000000000000075131325625637500225770ustar00rootroot00000000000000package dns import ( "io/ioutil" "os" "path/filepath" "strings" "testing" ) const normal string = ` # Comment domain somedomain.com nameserver 10.28.10.2 nameserver 11.28.10.1 ` const missingNewline string = ` domain somedomain.com nameserver 10.28.10.2 nameserver 11.28.10.1` // <- NOTE: NO newline. func testConfig(t *testing.T, data string) { cc, err := ClientConfigFromReader(strings.NewReader(data)) if err != nil { t.Errorf("error parsing resolv.conf: %v", err) } if l := len(cc.Servers); l != 2 { t.Errorf("incorrect number of nameservers detected: %d", l) } if l := len(cc.Search); l != 1 { t.Errorf("domain directive not parsed correctly: %v", cc.Search) } else { if cc.Search[0] != "somedomain.com" { t.Errorf("domain is unexpected: %v", cc.Search[0]) } } } func TestNameserver(t *testing.T) { testConfig(t, normal) } func TestMissingFinalNewLine(t *testing.T) { testConfig(t, missingNewline) } func TestNdots(t *testing.T) { ndotsVariants := map[string]int{ "options ndots:0": 0, "options ndots:1": 1, "options ndots:15": 15, "options ndots:16": 15, "options ndots:-1": 0, "": 1, } for data := range ndotsVariants { cc, err := ClientConfigFromReader(strings.NewReader(data)) if err != nil { t.Errorf("error parsing resolv.conf: %v", err) } if cc.Ndots != ndotsVariants[data] { t.Errorf("Ndots not properly parsed: (Expected: %d / Was: %d)", ndotsVariants[data], cc.Ndots) } } } func TestReadFromFile(t *testing.T) { tempDir, err := ioutil.TempDir("", "") if err != nil { t.Fatalf("tempDir: %v", err) } defer os.RemoveAll(tempDir) path := filepath.Join(tempDir, "resolv.conf") if err := ioutil.WriteFile(path, []byte(normal), 0644); err != nil { t.Fatalf("writeFile: %v", err) } cc, err := ClientConfigFromFile(path) if err != nil { t.Errorf("error parsing resolv.conf: %v", err) } if l := len(cc.Servers); l != 2 { t.Errorf("incorrect number of nameservers detected: %d", l) } if l := len(cc.Search); l != 1 { t.Errorf("domain directive not parsed correctly: %v", cc.Search) } else { if cc.Search[0] != "somedomain.com" { t.Errorf("domain is unexpected: %v", cc.Search[0]) } } } func TestNameListNdots1(t *testing.T) { cfg := ClientConfig{ Ndots: 1, } // fqdn should be only result returned names := cfg.NameList("miek.nl.") if len(names) != 1 { t.Errorf("NameList returned != 1 names: %v", names) } else if names[0] != "miek.nl." { t.Errorf("NameList didn't return sent fqdn domain: %v", names[0]) } cfg.Search = []string{ "test", } // Sent domain has NDots and search names = cfg.NameList("miek.nl") if len(names) != 2 { t.Errorf("NameList returned != 2 names: %v", names) } else if names[0] != "miek.nl." { t.Errorf("NameList didn't return sent domain first: %v", names[0]) } else if names[1] != "miek.nl.test." { t.Errorf("NameList didn't return search last: %v", names[1]) } } func TestNameListNdots2(t *testing.T) { cfg := ClientConfig{ Ndots: 2, } // Sent domain has less than NDots and search cfg.Search = []string{ "test", } names := cfg.NameList("miek.nl") if len(names) != 2 { t.Errorf("NameList returned != 2 names: %v", names) } else if names[0] != "miek.nl.test." { t.Errorf("NameList didn't return search first: %v", names[0]) } else if names[1] != "miek.nl." { t.Errorf("NameList didn't return sent domain last: %v", names[1]) } } func TestNameListNdots0(t *testing.T) { cfg := ClientConfig{ Ndots: 0, } cfg.Search = []string{ "test", } // Sent domain has less than NDots and search names := cfg.NameList("miek") if len(names) != 2 { t.Errorf("NameList returned != 2 names: %v", names) } else if names[0] != "miek." { t.Errorf("NameList didn't return search first: %v", names[0]) } else if names[1] != "miek.test." { t.Errorf("NameList didn't return sent domain last: %v", names[1]) } } golang-github-miekg-dns-1.0.4+ds/compress_generate.go000066400000000000000000000116001325625637500225710ustar00rootroot00000000000000//+build ignore // compression_generate.go is meant to run with go generate. It will use // go/{importer,types} to track down all the RR struct types. Then for each type // it will look to see if there are (compressible) names, if so it will add that // type to compressionLenHelperType and comressionLenSearchType which "fake" the // compression so that Len() is fast. package main import ( "bytes" "fmt" "go/format" "go/importer" "go/types" "log" "os" ) var packageHdr = ` // Code generated by "go run compress_generate.go"; DO NOT EDIT. package dns ` // getTypeStruct will take a type and the package scope, and return the // (innermost) struct if the type is considered a RR type (currently defined as // those structs beginning with a RR_Header, could be redefined as implementing // the RR interface). The bool return value indicates if embedded structs were // resolved. func getTypeStruct(t types.Type, scope *types.Scope) (*types.Struct, bool) { st, ok := t.Underlying().(*types.Struct) if !ok { return nil, false } if st.Field(0).Type() == scope.Lookup("RR_Header").Type() { return st, false } if st.Field(0).Anonymous() { st, _ := getTypeStruct(st.Field(0).Type(), scope) return st, true } return nil, false } func main() { // Import and type-check the package pkg, err := importer.Default().Import("github.com/miekg/dns") fatalIfErr(err) scope := pkg.Scope() var domainTypes []string // Types that have a domain name in them (either compressible or not). var cdomainTypes []string // Types that have a compressible domain name in them (subset of domainType) Names: for _, name := range scope.Names() { o := scope.Lookup(name) if o == nil || !o.Exported() { continue } st, _ := getTypeStruct(o.Type(), scope) if st == nil { continue } if name == "PrivateRR" { continue } if scope.Lookup("Type"+o.Name()) == nil && o.Name() != "RFC3597" { log.Fatalf("Constant Type%s does not exist.", o.Name()) } for i := 1; i < st.NumFields(); i++ { if _, ok := st.Field(i).Type().(*types.Slice); ok { if st.Tag(i) == `dns:"domain-name"` { domainTypes = append(domainTypes, o.Name()) continue Names } if st.Tag(i) == `dns:"cdomain-name"` { cdomainTypes = append(cdomainTypes, o.Name()) domainTypes = append(domainTypes, o.Name()) continue Names } continue } switch { case st.Tag(i) == `dns:"domain-name"`: domainTypes = append(domainTypes, o.Name()) continue Names case st.Tag(i) == `dns:"cdomain-name"`: cdomainTypes = append(cdomainTypes, o.Name()) domainTypes = append(domainTypes, o.Name()) continue Names } } } b := &bytes.Buffer{} b.WriteString(packageHdr) // compressionLenHelperType - all types that have domain-name/cdomain-name can be used for compressing names fmt.Fprint(b, "func compressionLenHelperType(c map[string]int, r RR) {\n") fmt.Fprint(b, "switch x := r.(type) {\n") for _, name := range domainTypes { o := scope.Lookup(name) st, _ := getTypeStruct(o.Type(), scope) fmt.Fprintf(b, "case *%s:\n", name) for i := 1; i < st.NumFields(); i++ { out := func(s string) { fmt.Fprintf(b, "compressionLenHelper(c, x.%s)\n", st.Field(i).Name()) } if _, ok := st.Field(i).Type().(*types.Slice); ok { switch st.Tag(i) { case `dns:"domain-name"`: fallthrough case `dns:"cdomain-name"`: // For HIP we need to slice over the elements in this slice. fmt.Fprintf(b, `for i := range x.%s { compressionLenHelper(c, x.%s[i]) } `, st.Field(i).Name(), st.Field(i).Name()) } continue } switch { case st.Tag(i) == `dns:"cdomain-name"`: fallthrough case st.Tag(i) == `dns:"domain-name"`: out(st.Field(i).Name()) } } } fmt.Fprintln(b, "}\n}\n\n") // compressionLenSearchType - search cdomain-tags types for compressible names. fmt.Fprint(b, "func compressionLenSearchType(c map[string]int, r RR) (int, bool) {\n") fmt.Fprint(b, "switch x := r.(type) {\n") for _, name := range cdomainTypes { o := scope.Lookup(name) st, _ := getTypeStruct(o.Type(), scope) fmt.Fprintf(b, "case *%s:\n", name) j := 1 for i := 1; i < st.NumFields(); i++ { out := func(s string, j int) { fmt.Fprintf(b, "k%d, ok%d := compressionLenSearch(c, x.%s)\n", j, j, st.Field(i).Name()) } // There are no slice types with names that can be compressed. switch { case st.Tag(i) == `dns:"cdomain-name"`: out(st.Field(i).Name(), j) j++ } } k := "k1" ok := "ok1" for i := 2; i < j; i++ { k += fmt.Sprintf(" + k%d", i) ok += fmt.Sprintf(" && ok%d", i) } fmt.Fprintf(b, "return %s, %s\n", k, ok) } fmt.Fprintln(b, "}\nreturn 0, false\n}\n\n") // gofmt res, err := format.Source(b.Bytes()) if err != nil { b.WriteTo(os.Stderr) log.Fatal(err) } f, err := os.Create("zcompress.go") fatalIfErr(err) defer f.Close() f.Write(res) } func fatalIfErr(err error) { if err != nil { log.Fatal(err) } } golang-github-miekg-dns-1.0.4+ds/dane.go000066400000000000000000000017451325625637500200040ustar00rootroot00000000000000package dns import ( "crypto/sha256" "crypto/sha512" "crypto/x509" "encoding/hex" "errors" ) // CertificateToDANE converts a certificate to a hex string as used in the TLSA or SMIMEA records. func CertificateToDANE(selector, matchingType uint8, cert *x509.Certificate) (string, error) { switch matchingType { case 0: switch selector { case 0: return hex.EncodeToString(cert.Raw), nil case 1: return hex.EncodeToString(cert.RawSubjectPublicKeyInfo), nil } case 1: h := sha256.New() switch selector { case 0: h.Write(cert.Raw) return hex.EncodeToString(h.Sum(nil)), nil case 1: h.Write(cert.RawSubjectPublicKeyInfo) return hex.EncodeToString(h.Sum(nil)), nil } case 2: h := sha512.New() switch selector { case 0: h.Write(cert.Raw) return hex.EncodeToString(h.Sum(nil)), nil case 1: h.Write(cert.RawSubjectPublicKeyInfo) return hex.EncodeToString(h.Sum(nil)), nil } } return "", errors.New("dns: bad MatchingType or Selector") } golang-github-miekg-dns-1.0.4+ds/defaults.go000066400000000000000000000204141325625637500206760ustar00rootroot00000000000000package dns import ( "errors" "net" "strconv" ) const hexDigit = "0123456789abcdef" // Everything is assumed in ClassINET. // SetReply creates a reply message from a request message. func (dns *Msg) SetReply(request *Msg) *Msg { dns.Id = request.Id dns.Response = true dns.Opcode = request.Opcode if dns.Opcode == OpcodeQuery { dns.RecursionDesired = request.RecursionDesired // Copy rd bit dns.CheckingDisabled = request.CheckingDisabled // Copy cd bit } dns.Rcode = RcodeSuccess if len(request.Question) > 0 { dns.Question = make([]Question, 1) dns.Question[0] = request.Question[0] } return dns } // SetQuestion creates a question message, it sets the Question // section, generates an Id and sets the RecursionDesired (RD) // bit to true. func (dns *Msg) SetQuestion(z string, t uint16) *Msg { dns.Id = Id() dns.RecursionDesired = true dns.Question = make([]Question, 1) dns.Question[0] = Question{z, t, ClassINET} return dns } // SetNotify creates a notify message, it sets the Question // section, generates an Id and sets the Authoritative (AA) // bit to true. func (dns *Msg) SetNotify(z string) *Msg { dns.Opcode = OpcodeNotify dns.Authoritative = true dns.Id = Id() dns.Question = make([]Question, 1) dns.Question[0] = Question{z, TypeSOA, ClassINET} return dns } // SetRcode creates an error message suitable for the request. func (dns *Msg) SetRcode(request *Msg, rcode int) *Msg { dns.SetReply(request) dns.Rcode = rcode return dns } // SetRcodeFormatError creates a message with FormError set. func (dns *Msg) SetRcodeFormatError(request *Msg) *Msg { dns.Rcode = RcodeFormatError dns.Opcode = OpcodeQuery dns.Response = true dns.Authoritative = false dns.Id = request.Id return dns } // SetUpdate makes the message a dynamic update message. It // sets the ZONE section to: z, TypeSOA, ClassINET. func (dns *Msg) SetUpdate(z string) *Msg { dns.Id = Id() dns.Response = false dns.Opcode = OpcodeUpdate dns.Compress = false // BIND9 cannot handle compression dns.Question = make([]Question, 1) dns.Question[0] = Question{z, TypeSOA, ClassINET} return dns } // SetIxfr creates message for requesting an IXFR. func (dns *Msg) SetIxfr(z string, serial uint32, ns, mbox string) *Msg { dns.Id = Id() dns.Question = make([]Question, 1) dns.Ns = make([]RR, 1) s := new(SOA) s.Hdr = RR_Header{z, TypeSOA, ClassINET, defaultTtl, 0} s.Serial = serial s.Ns = ns s.Mbox = mbox dns.Question[0] = Question{z, TypeIXFR, ClassINET} dns.Ns[0] = s return dns } // SetAxfr creates message for requesting an AXFR. func (dns *Msg) SetAxfr(z string) *Msg { dns.Id = Id() dns.Question = make([]Question, 1) dns.Question[0] = Question{z, TypeAXFR, ClassINET} return dns } // SetTsig appends a TSIG RR to the message. // This is only a skeleton TSIG RR that is added as the last RR in the // additional section. The Tsig is calculated when the message is being send. func (dns *Msg) SetTsig(z, algo string, fudge uint16, timesigned int64) *Msg { t := new(TSIG) t.Hdr = RR_Header{z, TypeTSIG, ClassANY, 0, 0} t.Algorithm = algo t.Fudge = fudge t.TimeSigned = uint64(timesigned) t.OrigId = dns.Id dns.Extra = append(dns.Extra, t) return dns } // SetEdns0 appends a EDNS0 OPT RR to the message. // TSIG should always the last RR in a message. func (dns *Msg) SetEdns0(udpsize uint16, do bool) *Msg { e := new(OPT) e.Hdr.Name = "." e.Hdr.Rrtype = TypeOPT e.SetUDPSize(udpsize) if do { e.SetDo() } dns.Extra = append(dns.Extra, e) return dns } // IsTsig checks if the message has a TSIG record as the last record // in the additional section. It returns the TSIG record found or nil. func (dns *Msg) IsTsig() *TSIG { if len(dns.Extra) > 0 { if dns.Extra[len(dns.Extra)-1].Header().Rrtype == TypeTSIG { return dns.Extra[len(dns.Extra)-1].(*TSIG) } } return nil } // IsEdns0 checks if the message has a EDNS0 (OPT) record, any EDNS0 // record in the additional section will do. It returns the OPT record // found or nil. func (dns *Msg) IsEdns0() *OPT { // EDNS0 is at the end of the additional section, start there. // We might want to change this to *only* look at the last two // records. So we see TSIG and/or OPT - this a slightly bigger // change though. for i := len(dns.Extra) - 1; i >= 0; i-- { if dns.Extra[i].Header().Rrtype == TypeOPT { return dns.Extra[i].(*OPT) } } return nil } // IsDomainName checks if s is a valid domain name, it returns the number of // labels and true, when a domain name is valid. Note that non fully qualified // domain name is considered valid, in this case the last label is counted in // the number of labels. When false is returned the number of labels is not // defined. Also note that this function is extremely liberal; almost any // string is a valid domain name as the DNS is 8 bit protocol. It checks if each // label fits in 63 characters, but there is no length check for the entire // string s. I.e. a domain name longer than 255 characters is considered valid. func IsDomainName(s string) (labels int, ok bool) { _, labels, err := packDomainName(s, nil, 0, nil, false) return labels, err == nil } // IsSubDomain checks if child is indeed a child of the parent. If child and parent // are the same domain true is returned as well. func IsSubDomain(parent, child string) bool { // Entire child is contained in parent return CompareDomainName(parent, child) == CountLabel(parent) } // IsMsg sanity checks buf and returns an error if it isn't a valid DNS packet. // The checking is performed on the binary payload. func IsMsg(buf []byte) error { // Header if len(buf) < 12 { return errors.New("dns: bad message header") } // Header: Opcode // TODO(miek): more checks here, e.g. check all header bits. return nil } // IsFqdn checks if a domain name is fully qualified. func IsFqdn(s string) bool { l := len(s) if l == 0 { return false } return s[l-1] == '.' } // IsRRset checks if a set of RRs is a valid RRset as defined by RFC 2181. // This means the RRs need to have the same type, name, and class. Returns true // if the RR set is valid, otherwise false. func IsRRset(rrset []RR) bool { if len(rrset) == 0 { return false } if len(rrset) == 1 { return true } rrHeader := rrset[0].Header() rrType := rrHeader.Rrtype rrClass := rrHeader.Class rrName := rrHeader.Name for _, rr := range rrset[1:] { curRRHeader := rr.Header() if curRRHeader.Rrtype != rrType || curRRHeader.Class != rrClass || curRRHeader.Name != rrName { // Mismatch between the records, so this is not a valid rrset for //signing/verifying return false } } return true } // Fqdn return the fully qualified domain name from s. // If s is already fully qualified, it behaves as the identity function. func Fqdn(s string) string { if IsFqdn(s) { return s } return s + "." } // Copied from the official Go code. // ReverseAddr returns the in-addr.arpa. or ip6.arpa. hostname of the IP // address suitable for reverse DNS (PTR) record lookups or an error if it fails // to parse the IP address. func ReverseAddr(addr string) (arpa string, err error) { ip := net.ParseIP(addr) if ip == nil { return "", &Error{err: "unrecognized address: " + addr} } if ip.To4() != nil { return strconv.Itoa(int(ip[15])) + "." + strconv.Itoa(int(ip[14])) + "." + strconv.Itoa(int(ip[13])) + "." + strconv.Itoa(int(ip[12])) + ".in-addr.arpa.", nil } // Must be IPv6 buf := make([]byte, 0, len(ip)*4+len("ip6.arpa.")) // Add it, in reverse, to the buffer for i := len(ip) - 1; i >= 0; i-- { v := ip[i] buf = append(buf, hexDigit[v&0xF]) buf = append(buf, '.') buf = append(buf, hexDigit[v>>4]) buf = append(buf, '.') } // Append "ip6.arpa." and return (buf already has the final .) buf = append(buf, "ip6.arpa."...) return string(buf), nil } // String returns the string representation for the type t. func (t Type) String() string { if t1, ok := TypeToString[uint16(t)]; ok { return t1 } return "TYPE" + strconv.Itoa(int(t)) } // String returns the string representation for the class c. func (c Class) String() string { if s, ok := ClassToString[uint16(c)]; ok { // Only emit mnemonics when they are unambiguous, specically ANY is in both. if _, ok := StringToType[s]; !ok { return s } } return "CLASS" + strconv.Itoa(int(c)) } // String returns the string representation for the name n. func (n Name) String() string { return sprintName(string(n)) } golang-github-miekg-dns-1.0.4+ds/dns.go000066400000000000000000000050251325625637500176540ustar00rootroot00000000000000package dns import "strconv" const ( year68 = 1 << 31 // For RFC1982 (Serial Arithmetic) calculations in 32 bits. defaultTtl = 3600 // Default internal TTL. // DefaultMsgSize is the standard default for messages larger than 512 bytes. DefaultMsgSize = 4096 // MinMsgSize is the minimal size of a DNS packet. MinMsgSize = 512 // MaxMsgSize is the largest possible DNS packet. MaxMsgSize = 65535 ) // Error represents a DNS error. type Error struct{ err string } func (e *Error) Error() string { if e == nil { return "dns: " } return "dns: " + e.err } // An RR represents a resource record. type RR interface { // Header returns the header of an resource record. The header contains // everything up to the rdata. Header() *RR_Header // String returns the text representation of the resource record. String() string // copy returns a copy of the RR copy() RR // len returns the length (in octets) of the uncompressed RR in wire format. len() int // pack packs an RR into wire format. pack([]byte, int, map[string]int, bool) (int, error) } // RR_Header is the header all DNS resource records share. type RR_Header struct { Name string `dns:"cdomain-name"` Rrtype uint16 Class uint16 Ttl uint32 Rdlength uint16 // Length of data after header. } // Header returns itself. This is here to make RR_Header implements the RR interface. func (h *RR_Header) Header() *RR_Header { return h } // Just to implement the RR interface. func (h *RR_Header) copy() RR { return nil } func (h *RR_Header) copyHeader() *RR_Header { r := new(RR_Header) r.Name = h.Name r.Rrtype = h.Rrtype r.Class = h.Class r.Ttl = h.Ttl r.Rdlength = h.Rdlength return r } func (h *RR_Header) String() string { var s string if h.Rrtype == TypeOPT { s = ";" // and maybe other things } s += sprintName(h.Name) + "\t" s += strconv.FormatInt(int64(h.Ttl), 10) + "\t" s += Class(h.Class).String() + "\t" s += Type(h.Rrtype).String() + "\t" return s } func (h *RR_Header) len() int { l := len(h.Name) + 1 l += 10 // rrtype(2) + class(2) + ttl(4) + rdlength(2) return l } // ToRFC3597 converts a known RR to the unknown RR representation from RFC 3597. func (rr *RFC3597) ToRFC3597(r RR) error { buf := make([]byte, r.len()*2) off, err := PackRR(r, buf, 0, nil, false) if err != nil { return err } buf = buf[:off] if int(r.Header().Rdlength) > off { return ErrBuf } rfc3597, _, err := unpackRFC3597(*r.Header(), buf, off-int(r.Header().Rdlength)) if err != nil { return err } *rr = *rfc3597.(*RFC3597) return nil } golang-github-miekg-dns-1.0.4+ds/dns_bench_test.go000066400000000000000000000131311325625637500220470ustar00rootroot00000000000000package dns import ( "net" "testing" ) func BenchmarkMsgLength(b *testing.B) { b.StopTimer() makeMsg := func(question string, ans, ns, e []RR) *Msg { msg := new(Msg) msg.SetQuestion(Fqdn(question), TypeANY) msg.Answer = append(msg.Answer, ans...) msg.Ns = append(msg.Ns, ns...) msg.Extra = append(msg.Extra, e...) msg.Compress = true return msg } name1 := "12345678901234567890123456789012345.12345678.123." rrMx := testRR(name1 + " 3600 IN MX 10 " + name1) msg := makeMsg(name1, []RR{rrMx, rrMx}, nil, nil) b.StartTimer() for i := 0; i < b.N; i++ { msg.Len() } } func BenchmarkMsgLengthNoCompression(b *testing.B) { b.StopTimer() makeMsg := func(question string, ans, ns, e []RR) *Msg { msg := new(Msg) msg.SetQuestion(Fqdn(question), TypeANY) msg.Answer = append(msg.Answer, ans...) msg.Ns = append(msg.Ns, ns...) msg.Extra = append(msg.Extra, e...) return msg } name1 := "12345678901234567890123456789012345.12345678.123." rrMx := testRR(name1 + " 3600 IN MX 10 " + name1) msg := makeMsg(name1, []RR{rrMx, rrMx}, nil, nil) b.StartTimer() for i := 0; i < b.N; i++ { msg.Len() } } func BenchmarkMsgLengthPack(b *testing.B) { makeMsg := func(question string, ans, ns, e []RR) *Msg { msg := new(Msg) msg.SetQuestion(Fqdn(question), TypeANY) msg.Answer = append(msg.Answer, ans...) msg.Ns = append(msg.Ns, ns...) msg.Extra = append(msg.Extra, e...) msg.Compress = true return msg } name1 := "12345678901234567890123456789012345.12345678.123." rrMx := testRR(name1 + " 3600 IN MX 10 " + name1) msg := makeMsg(name1, []RR{rrMx, rrMx}, nil, nil) b.ResetTimer() for i := 0; i < b.N; i++ { _, _ = msg.Pack() } } func BenchmarkPackDomainName(b *testing.B) { name1 := "12345678901234567890123456789012345.12345678.123." buf := make([]byte, len(name1)+1) b.ResetTimer() for i := 0; i < b.N; i++ { _, _ = PackDomainName(name1, buf, 0, nil, false) } } func BenchmarkUnpackDomainName(b *testing.B) { name1 := "12345678901234567890123456789012345.12345678.123." buf := make([]byte, len(name1)+1) _, _ = PackDomainName(name1, buf, 0, nil, false) b.ResetTimer() for i := 0; i < b.N; i++ { _, _, _ = UnpackDomainName(buf, 0) } } func BenchmarkUnpackDomainNameUnprintable(b *testing.B) { name1 := "\x02\x02\x02\x025\x02\x02\x02\x02.12345678.123." buf := make([]byte, len(name1)+1) _, _ = PackDomainName(name1, buf, 0, nil, false) b.ResetTimer() for i := 0; i < b.N; i++ { _, _, _ = UnpackDomainName(buf, 0) } } func BenchmarkCopy(b *testing.B) { b.ReportAllocs() m := new(Msg) m.SetQuestion("miek.nl.", TypeA) rr := testRR("miek.nl. 2311 IN A 127.0.0.1") m.Answer = []RR{rr} rr = testRR("miek.nl. 2311 IN NS 127.0.0.1") m.Ns = []RR{rr} rr = testRR("miek.nl. 2311 IN A 127.0.0.1") m.Extra = []RR{rr} b.ResetTimer() for i := 0; i < b.N; i++ { m.Copy() } } func BenchmarkPackA(b *testing.B) { a := &A{Hdr: RR_Header{Name: ".", Rrtype: TypeA, Class: ClassANY}, A: net.IPv4(127, 0, 0, 1)} buf := make([]byte, a.len()) b.ReportAllocs() b.ResetTimer() for i := 0; i < b.N; i++ { _, _ = PackRR(a, buf, 0, nil, false) } } func BenchmarkUnpackA(b *testing.B) { a := &A{Hdr: RR_Header{Name: ".", Rrtype: TypeA, Class: ClassANY}, A: net.IPv4(127, 0, 0, 1)} buf := make([]byte, a.len()) PackRR(a, buf, 0, nil, false) a = nil b.ReportAllocs() b.ResetTimer() for i := 0; i < b.N; i++ { _, _, _ = UnpackRR(buf, 0) } } func BenchmarkPackMX(b *testing.B) { m := &MX{Hdr: RR_Header{Name: ".", Rrtype: TypeA, Class: ClassANY}, Mx: "mx.miek.nl."} buf := make([]byte, m.len()) b.ReportAllocs() b.ResetTimer() for i := 0; i < b.N; i++ { _, _ = PackRR(m, buf, 0, nil, false) } } func BenchmarkUnpackMX(b *testing.B) { m := &MX{Hdr: RR_Header{Name: ".", Rrtype: TypeA, Class: ClassANY}, Mx: "mx.miek.nl."} buf := make([]byte, m.len()) PackRR(m, buf, 0, nil, false) m = nil b.ReportAllocs() b.ResetTimer() for i := 0; i < b.N; i++ { _, _, _ = UnpackRR(buf, 0) } } func BenchmarkPackAAAAA(b *testing.B) { aaaa := testRR(". IN A ::1") buf := make([]byte, aaaa.len()) b.ReportAllocs() b.ResetTimer() for i := 0; i < b.N; i++ { _, _ = PackRR(aaaa, buf, 0, nil, false) } } func BenchmarkUnpackAAAA(b *testing.B) { aaaa := testRR(". IN A ::1") buf := make([]byte, aaaa.len()) PackRR(aaaa, buf, 0, nil, false) aaaa = nil b.ReportAllocs() b.ResetTimer() for i := 0; i < b.N; i++ { _, _, _ = UnpackRR(buf, 0) } } func BenchmarkPackMsg(b *testing.B) { makeMsg := func(question string, ans, ns, e []RR) *Msg { msg := new(Msg) msg.SetQuestion(Fqdn(question), TypeANY) msg.Answer = append(msg.Answer, ans...) msg.Ns = append(msg.Ns, ns...) msg.Extra = append(msg.Extra, e...) msg.Compress = true return msg } name1 := "12345678901234567890123456789012345.12345678.123." rrMx := testRR(name1 + " 3600 IN MX 10 " + name1) msg := makeMsg(name1, []RR{rrMx, rrMx}, nil, nil) buf := make([]byte, 512) b.ReportAllocs() b.ResetTimer() for i := 0; i < b.N; i++ { _, _ = msg.PackBuffer(buf) } } func BenchmarkUnpackMsg(b *testing.B) { makeMsg := func(question string, ans, ns, e []RR) *Msg { msg := new(Msg) msg.SetQuestion(Fqdn(question), TypeANY) msg.Answer = append(msg.Answer, ans...) msg.Ns = append(msg.Ns, ns...) msg.Extra = append(msg.Extra, e...) msg.Compress = true return msg } name1 := "12345678901234567890123456789012345.12345678.123." rrMx := testRR(name1 + " 3600 IN MX 10 " + name1) msg := makeMsg(name1, []RR{rrMx, rrMx}, nil, nil) msgBuf, _ := msg.Pack() b.ReportAllocs() b.ResetTimer() for i := 0; i < b.N; i++ { _ = msg.Unpack(msgBuf) } } func BenchmarkIdGeneration(b *testing.B) { for i := 0; i < b.N; i++ { _ = id() } } golang-github-miekg-dns-1.0.4+ds/dns_test.go000066400000000000000000000451651325625637500207240ustar00rootroot00000000000000package dns import ( "bytes" "encoding/hex" "net" "testing" ) func TestPackUnpack(t *testing.T) { out := new(Msg) out.Answer = make([]RR, 1) key := new(DNSKEY) key = &DNSKEY{Flags: 257, Protocol: 3, Algorithm: RSASHA1} key.Hdr = RR_Header{Name: "miek.nl.", Rrtype: TypeDNSKEY, Class: ClassINET, Ttl: 3600} key.PublicKey = "AwEAAaHIwpx3w4VHKi6i1LHnTaWeHCL154Jug0Rtc9ji5qwPXpBo6A5sRv7cSsPQKPIwxLpyCrbJ4mr2L0EPOdvP6z6YfljK2ZmTbogU9aSU2fiq/4wjxbdkLyoDVgtO+JsxNN4bjr4WcWhsmk1Hg93FV9ZpkWb0Tbad8DFqNDzr//kZ" out.Answer[0] = key msg, err := out.Pack() if err != nil { t.Error("failed to pack msg with DNSKEY") } in := new(Msg) if in.Unpack(msg) != nil { t.Error("failed to unpack msg with DNSKEY") } sig := new(RRSIG) sig = &RRSIG{TypeCovered: TypeDNSKEY, Algorithm: RSASHA1, Labels: 2, OrigTtl: 3600, Expiration: 4000, Inception: 4000, KeyTag: 34641, SignerName: "miek.nl.", Signature: "AwEAAaHIwpx3w4VHKi6i1LHnTaWeHCL154Jug0Rtc9ji5qwPXpBo6A5sRv7cSsPQKPIwxLpyCrbJ4mr2L0EPOdvP6z6YfljK2ZmTbogU9aSU2fiq/4wjxbdkLyoDVgtO+JsxNN4bjr4WcWhsmk1Hg93FV9ZpkWb0Tbad8DFqNDzr//kZ"} sig.Hdr = RR_Header{Name: "miek.nl.", Rrtype: TypeRRSIG, Class: ClassINET, Ttl: 3600} out.Answer[0] = sig msg, err = out.Pack() if err != nil { t.Error("failed to pack msg with RRSIG") } if in.Unpack(msg) != nil { t.Error("failed to unpack msg with RRSIG") } } func TestPackUnpack2(t *testing.T) { m := new(Msg) m.Extra = make([]RR, 1) m.Answer = make([]RR, 1) dom := "miek.nl." rr := new(A) rr.Hdr = RR_Header{Name: dom, Rrtype: TypeA, Class: ClassINET, Ttl: 0} rr.A = net.IPv4(127, 0, 0, 1) x := new(TXT) x.Hdr = RR_Header{Name: dom, Rrtype: TypeTXT, Class: ClassINET, Ttl: 0} x.Txt = []string{"heelalaollo"} m.Extra[0] = x m.Answer[0] = rr _, err := m.Pack() if err != nil { t.Error("Packing failed: ", err) return } } func TestPackUnpack3(t *testing.T) { m := new(Msg) m.Extra = make([]RR, 2) m.Answer = make([]RR, 1) dom := "miek.nl." rr := new(A) rr.Hdr = RR_Header{Name: dom, Rrtype: TypeA, Class: ClassINET, Ttl: 0} rr.A = net.IPv4(127, 0, 0, 1) x1 := new(TXT) x1.Hdr = RR_Header{Name: dom, Rrtype: TypeTXT, Class: ClassINET, Ttl: 0} x1.Txt = []string{} x2 := new(TXT) x2.Hdr = RR_Header{Name: dom, Rrtype: TypeTXT, Class: ClassINET, Ttl: 0} x2.Txt = []string{"heelalaollo"} m.Extra[0] = x1 m.Extra[1] = x2 m.Answer[0] = rr b, err := m.Pack() if err != nil { t.Error("packing failed: ", err) return } var unpackMsg Msg err = unpackMsg.Unpack(b) if err != nil { t.Error("unpacking failed") return } } func TestBailiwick(t *testing.T) { yes := map[string]string{ "miek1.nl": "miek1.nl", "miek.nl": "ns.miek.nl", ".": "miek.nl", } for parent, child := range yes { if !IsSubDomain(parent, child) { t.Errorf("%s should be child of %s", child, parent) t.Errorf("comparelabels %d", CompareDomainName(parent, child)) t.Errorf("lenlabels %d %d", CountLabel(parent), CountLabel(child)) } } no := map[string]string{ "www.miek.nl": "ns.miek.nl", "m\\.iek.nl": "ns.miek.nl", "w\\.iek.nl": "w.iek.nl", "p\\\\.iek.nl": "ns.p.iek.nl", // p\\.iek.nl , literal \ in domain name "miek.nl": ".", } for parent, child := range no { if IsSubDomain(parent, child) { t.Errorf("%s should not be child of %s", child, parent) t.Errorf("comparelabels %d", CompareDomainName(parent, child)) t.Errorf("lenlabels %d %d", CountLabel(parent), CountLabel(child)) } } } func TestPackNAPTR(t *testing.T) { for _, n := range []string{ `apple.com. IN NAPTR 100 50 "se" "SIP+D2U" "" _sip._udp.apple.com.`, `apple.com. IN NAPTR 90 50 "se" "SIP+D2T" "" _sip._tcp.apple.com.`, `apple.com. IN NAPTR 50 50 "se" "SIPS+D2T" "" _sips._tcp.apple.com.`, } { rr := testRR(n) msg := make([]byte, rr.len()) if off, err := PackRR(rr, msg, 0, nil, false); err != nil { t.Errorf("packing failed: %v", err) t.Errorf("length %d, need more than %d", rr.len(), off) } } } func TestCompressLength(t *testing.T) { m := new(Msg) m.SetQuestion("miek.nl", TypeMX) ul := m.Len() m.Compress = true if ul != m.Len() { t.Fatalf("should be equal") } } // Does the predicted length match final packed length? func TestMsgCompressLength(t *testing.T) { makeMsg := func(question string, ans, ns, e []RR) *Msg { msg := new(Msg) msg.SetQuestion(Fqdn(question), TypeANY) msg.Answer = append(msg.Answer, ans...) msg.Ns = append(msg.Ns, ns...) msg.Extra = append(msg.Extra, e...) msg.Compress = true return msg } name1 := "12345678901234567890123456789012345.12345678.123." rrA := testRR(name1 + " 3600 IN A 192.0.2.1") rrMx := testRR(name1 + " 3600 IN MX 10 " + name1) tests := []*Msg{ makeMsg(name1, []RR{rrA}, nil, nil), makeMsg(name1, []RR{rrMx, rrMx}, nil, nil)} for _, msg := range tests { predicted := msg.Len() buf, err := msg.Pack() if err != nil { t.Error(err) } if predicted < len(buf) { t.Errorf("predicted compressed length is wrong: predicted %s (len=%d) %d, actual %d", msg.Question[0].Name, len(msg.Answer), predicted, len(buf)) } } } func TestMsgLength(t *testing.T) { makeMsg := func(question string, ans, ns, e []RR) *Msg { msg := new(Msg) msg.SetQuestion(Fqdn(question), TypeANY) msg.Answer = append(msg.Answer, ans...) msg.Ns = append(msg.Ns, ns...) msg.Extra = append(msg.Extra, e...) return msg } name1 := "12345678901234567890123456789012345.12345678.123." rrA := testRR(name1 + " 3600 IN A 192.0.2.1") rrMx := testRR(name1 + " 3600 IN MX 10 " + name1) tests := []*Msg{ makeMsg(name1, []RR{rrA}, nil, nil), makeMsg(name1, []RR{rrMx, rrMx}, nil, nil)} for _, msg := range tests { predicted := msg.Len() buf, err := msg.Pack() if err != nil { t.Error(err) } if predicted < len(buf) { t.Errorf("predicted length is wrong: predicted %s (len=%d), actual %d", msg.Question[0].Name, predicted, len(buf)) } } } func TestMsgLength2(t *testing.T) { // Serialized replies var testMessages = []string{ // google.com. IN A? "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", // amazon.com. IN A? (reply has no EDNS0 record) // TODO(miek): this one is off-by-one, need to find out why //"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", // yahoo.com. IN A? "fc2d81800001000300070008057961686f6f03636f6d0000010001c00c00010001000000050004628afd6dc00c00010001000000050004628bb718c00c00010001000000050004cebe242dc00c00020001000000050006036e7336c00cc00c00020001000000050006036e7338c00cc00c00020001000000050006036e7331c00cc00c00020001000000050006036e7332c00cc00c00020001000000050006036e7333c00cc00c00020001000000050006036e7334c00cc00c00020001000000050006036e7335c00cc07b0001000100000005000444b48310c08d00010001000000050004448eff10c09f00010001000000050004cb54dd35c0b100010001000000050004628a0b9dc0c30001000100000005000477a0f77cc05700010001000000050004ca2bdfaac06900010001000000050004caa568160000290500000000050000", // microsoft.com. IN A? "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", // google.com. IN MX? "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", // reddit.com. IN A? "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", } for i, hexData := range testMessages { // we won't fail the decoding of the hex input, _ := hex.DecodeString(hexData) m := new(Msg) m.Unpack(input) m.Compress = true lenComp := m.Len() b, _ := m.Pack() pacComp := len(b) m.Compress = false lenUnComp := m.Len() b, _ = m.Pack() pacUnComp := len(b) if pacComp+1 != lenComp { t.Errorf("msg.Len(compressed)=%d actual=%d for test %d", lenComp, pacComp, i) } if pacUnComp+1 != lenUnComp { t.Errorf("msg.Len(uncompressed)=%d actual=%d for test %d", lenUnComp, pacUnComp, i) } } } func TestMsgLengthCompressionMalformed(t *testing.T) { // SOA with empty hostmaster, which is illegal soa := &SOA{Hdr: RR_Header{Name: ".", Rrtype: TypeSOA, Class: ClassINET, Ttl: 12345}, Ns: ".", Mbox: "", Serial: 0, Refresh: 28800, Retry: 7200, Expire: 604800, Minttl: 60} m := new(Msg) m.Compress = true m.Ns = []RR{soa} m.Len() // Should not crash. } func TestMsgCompressLength2(t *testing.T) { msg := new(Msg) msg.Compress = true msg.SetQuestion(Fqdn("bliep."), TypeANY) msg.Answer = append(msg.Answer, &SRV{Hdr: RR_Header{Name: "blaat.", Rrtype: 0x21, Class: 0x1, Ttl: 0x3c}, Port: 0x4c57, Target: "foo.bar."}) msg.Extra = append(msg.Extra, &A{Hdr: RR_Header{Name: "foo.bar.", Rrtype: 0x1, Class: 0x1, Ttl: 0x3c}, A: net.IP{0xac, 0x11, 0x0, 0x3}}) predicted := msg.Len() buf, err := msg.Pack() if err != nil { t.Error(err) } if predicted != len(buf) { t.Errorf("predicted compressed length is wrong: predicted %s (len=%d) %d, actual %d", msg.Question[0].Name, len(msg.Answer), predicted, len(buf)) } } func TestToRFC3597(t *testing.T) { a := testRR("miek.nl. IN A 10.0.1.1") x := new(RFC3597) x.ToRFC3597(a) if x.String() != `miek.nl. 3600 CLASS1 TYPE1 \# 4 0a000101` { t.Errorf("string mismatch, got: %s", x) } b := testRR("miek.nl. IN MX 10 mx.miek.nl.") x.ToRFC3597(b) if x.String() != `miek.nl. 3600 CLASS1 TYPE15 \# 14 000a026d78046d69656b026e6c00` { t.Errorf("string mismatch, got: %s", x) } } func TestNoRdataPack(t *testing.T) { data := make([]byte, 1024) for typ, fn := range TypeToRR { r := fn() *r.Header() = RR_Header{Name: "miek.nl.", Rrtype: typ, Class: ClassINET, Ttl: 16} _, err := PackRR(r, data, 0, nil, false) if err != nil { t.Errorf("failed to pack RR with zero rdata: %s: %v", TypeToString[typ], err) } } } func TestNoRdataUnpack(t *testing.T) { data := make([]byte, 1024) for typ, fn := range TypeToRR { if typ == TypeSOA || typ == TypeTSIG || typ == TypeTKEY { // SOA, TSIG will not be seen (like this) in dyn. updates? // TKEY requires length fields to be present for the Key and OtherData fields continue } r := fn() *r.Header() = RR_Header{Name: "miek.nl.", Rrtype: typ, Class: ClassINET, Ttl: 16} off, err := PackRR(r, data, 0, nil, false) if err != nil { // Should always works, TestNoDataPack should have caught this t.Errorf("failed to pack RR: %v", err) continue } if _, _, err := UnpackRR(data[:off], 0); err != nil { t.Errorf("failed to unpack RR with zero rdata: %s: %v", TypeToString[typ], err) } } } func TestRdataOverflow(t *testing.T) { rr := new(RFC3597) rr.Hdr.Name = "." rr.Hdr.Class = ClassINET rr.Hdr.Rrtype = 65280 rr.Rdata = hex.EncodeToString(make([]byte, 0xFFFF)) buf := make([]byte, 0xFFFF*2) if _, err := PackRR(rr, buf, 0, nil, false); err != nil { t.Fatalf("maximum size rrdata pack failed: %v", err) } rr.Rdata += "00" if _, err := PackRR(rr, buf, 0, nil, false); err != ErrRdata { t.Fatalf("oversize rrdata pack didn't return ErrRdata - instead: %v", err) } } func TestCopy(t *testing.T) { rr := testRR("miek.nl. 2311 IN A 127.0.0.1") // Weird TTL to avoid catching TTL rr1 := Copy(rr) if rr.String() != rr1.String() { t.Fatalf("Copy() failed %s != %s", rr.String(), rr1.String()) } } func TestMsgCopy(t *testing.T) { m := new(Msg) m.SetQuestion("miek.nl.", TypeA) rr := testRR("miek.nl. 2311 IN A 127.0.0.1") m.Answer = []RR{rr} rr = testRR("miek.nl. 2311 IN NS 127.0.0.1") m.Ns = []RR{rr} m1 := m.Copy() if m.String() != m1.String() { t.Fatalf("Msg.Copy() failed %s != %s", m.String(), m1.String()) } m1.Answer[0] = testRR("somethingelse.nl. 2311 IN A 127.0.0.1") if m.String() == m1.String() { t.Fatalf("Msg.Copy() failed; change to copy changed template %s", m.String()) } rr = testRR("miek.nl. 2311 IN A 127.0.0.2") m1.Answer = append(m1.Answer, rr) if m1.Ns[0].String() == m1.Answer[1].String() { t.Fatalf("Msg.Copy() failed; append changed underlying array %s", m1.Ns[0].String()) } } func TestMsgPackBuffer(t *testing.T) { var testMessages = []string{ // news.ycombinator.com.in.escapemg.com. IN A, response "586285830001000000010000046e6577730b79636f6d62696e61746f7203636f6d02696e086573636170656d6703636f6d0000010001c0210006000100000e10002c036e7332c02103646e730b67726f6f7665736861726bc02d77ed50e600002a3000000e1000093a8000000e10", // news.ycombinator.com.in.escapemg.com. IN A, question "586201000001000000000000046e6577730b79636f6d62696e61746f7203636f6d02696e086573636170656d6703636f6d0000010001", "398781020001000000000000046e6577730b79636f6d62696e61746f7203636f6d0000010001", } for i, hexData := range testMessages { // we won't fail the decoding of the hex input, _ := hex.DecodeString(hexData) m := new(Msg) if err := m.Unpack(input); err != nil { t.Errorf("packet %d failed to unpack", i) continue } } } // Make sure we can decode a TKEY packet from the string, modify the RR, and then pack it again. func TestTKEY(t *testing.T) { // An example TKEY RR captured. There is no known accepted standard text format for a TKEY // record so we do this from a hex string instead of from a text readable string. tkeyStr := "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" tkeyBytes, err := hex.DecodeString(tkeyStr) if err != nil { t.Fatal("unable to decode TKEY string ", err) } // Decode the RR rr, tkeyLen, unPackErr := UnpackRR(tkeyBytes, 0) if unPackErr != nil { t.Fatal("unable to decode TKEY RR", unPackErr) } // Make sure it's a TKEY record if rr.Header().Rrtype != TypeTKEY { t.Fatal("Unable to decode TKEY") } // Make sure we get back the same length if rr.len() != len(tkeyBytes) { t.Fatalf("Lengths don't match %d != %d", rr.len(), len(tkeyBytes)) } // make space for it with some fudge room msg := make([]byte, tkeyLen+1000) offset, packErr := PackRR(rr, msg, 0, nil, false) if packErr != nil { t.Fatal("unable to pack TKEY RR", packErr) } if offset != len(tkeyBytes) { t.Fatalf("mismatched TKEY RR size %d != %d", len(tkeyBytes), offset) } if bytes.Compare(tkeyBytes, msg[0:offset]) != 0 { t.Fatal("mismatched TKEY data after rewriting bytes") } t.Logf("got TKEY of: " + rr.String()) // Now add some bytes to this and make sure we can encode OtherData properly tkey := rr.(*TKEY) tkey.OtherData = "abcd" tkey.OtherLen = 2 offset, packErr = PackRR(tkey, msg, 0, nil, false) if packErr != nil { t.Fatal("unable to pack TKEY RR after modification", packErr) } if offset != (len(tkeyBytes) + 2) { t.Fatalf("mismatched TKEY RR size %d != %d", offset, len(tkeyBytes)+2) } t.Logf("modified to TKEY of: " + rr.String()) // Make sure we can parse our string output tkey.Hdr.Class = ClassINET // https://github.com/miekg/dns/issues/577 newRR, newError := NewRR(tkey.String()) if newError != nil { t.Fatalf("unable to parse TKEY string: %s", newError) } t.Log("got reparsed TKEY of newRR: " + newRR.String()) } golang-github-miekg-dns-1.0.4+ds/dnssec.go000066400000000000000000000464461325625637500203630ustar00rootroot00000000000000package dns import ( "bytes" "crypto" "crypto/dsa" "crypto/ecdsa" "crypto/elliptic" _ "crypto/md5" "crypto/rand" "crypto/rsa" _ "crypto/sha1" _ "crypto/sha256" _ "crypto/sha512" "encoding/asn1" "encoding/binary" "encoding/hex" "math/big" "sort" "strings" "time" "golang.org/x/crypto/ed25519" ) // DNSSEC encryption algorithm codes. const ( _ uint8 = iota RSAMD5 DH DSA _ // Skip 4, RFC 6725, section 2.1 RSASHA1 DSANSEC3SHA1 RSASHA1NSEC3SHA1 RSASHA256 _ // Skip 9, RFC 6725, section 2.1 RSASHA512 _ // Skip 11, RFC 6725, section 2.1 ECCGOST ECDSAP256SHA256 ECDSAP384SHA384 ED25519 ED448 INDIRECT uint8 = 252 PRIVATEDNS uint8 = 253 // Private (experimental keys) PRIVATEOID uint8 = 254 ) // AlgorithmToString is a map of algorithm IDs to algorithm names. var AlgorithmToString = map[uint8]string{ RSAMD5: "RSAMD5", DH: "DH", DSA: "DSA", RSASHA1: "RSASHA1", DSANSEC3SHA1: "DSA-NSEC3-SHA1", RSASHA1NSEC3SHA1: "RSASHA1-NSEC3-SHA1", RSASHA256: "RSASHA256", RSASHA512: "RSASHA512", ECCGOST: "ECC-GOST", ECDSAP256SHA256: "ECDSAP256SHA256", ECDSAP384SHA384: "ECDSAP384SHA384", ED25519: "ED25519", ED448: "ED448", INDIRECT: "INDIRECT", PRIVATEDNS: "PRIVATEDNS", PRIVATEOID: "PRIVATEOID", } // StringToAlgorithm is the reverse of AlgorithmToString. var StringToAlgorithm = reverseInt8(AlgorithmToString) // AlgorithmToHash is a map of algorithm crypto hash IDs to crypto.Hash's. var AlgorithmToHash = map[uint8]crypto.Hash{ RSAMD5: crypto.MD5, // Deprecated in RFC 6725 RSASHA1: crypto.SHA1, RSASHA1NSEC3SHA1: crypto.SHA1, RSASHA256: crypto.SHA256, ECDSAP256SHA256: crypto.SHA256, ECDSAP384SHA384: crypto.SHA384, RSASHA512: crypto.SHA512, ED25519: crypto.Hash(0), } // DNSSEC hashing algorithm codes. const ( _ uint8 = iota SHA1 // RFC 4034 SHA256 // RFC 4509 GOST94 // RFC 5933 SHA384 // Experimental SHA512 // Experimental ) // HashToString is a map of hash IDs to names. var HashToString = map[uint8]string{ SHA1: "SHA1", SHA256: "SHA256", GOST94: "GOST94", SHA384: "SHA384", SHA512: "SHA512", } // StringToHash is a map of names to hash IDs. var StringToHash = reverseInt8(HashToString) // DNSKEY flag values. const ( SEP = 1 REVOKE = 1 << 7 ZONE = 1 << 8 ) // The RRSIG needs to be converted to wireformat with some of the rdata (the signature) missing. type rrsigWireFmt struct { TypeCovered uint16 Algorithm uint8 Labels uint8 OrigTtl uint32 Expiration uint32 Inception uint32 KeyTag uint16 SignerName string `dns:"domain-name"` /* No Signature */ } // Used for converting DNSKEY's rdata to wirefmt. type dnskeyWireFmt struct { Flags uint16 Protocol uint8 Algorithm uint8 PublicKey string `dns:"base64"` /* Nothing is left out */ } func divRoundUp(a, b int) int { return (a + b - 1) / b } // KeyTag calculates the keytag (or key-id) of the DNSKEY. func (k *DNSKEY) KeyTag() uint16 { if k == nil { return 0 } var keytag int switch k.Algorithm { case RSAMD5: // Look at the bottom two bytes of the modules, which the last // item in the pubkey. We could do this faster by looking directly // at the base64 values. But I'm lazy. modulus, _ := fromBase64([]byte(k.PublicKey)) if len(modulus) > 1 { x := binary.BigEndian.Uint16(modulus[len(modulus)-2:]) keytag = int(x) } default: keywire := new(dnskeyWireFmt) keywire.Flags = k.Flags keywire.Protocol = k.Protocol keywire.Algorithm = k.Algorithm keywire.PublicKey = k.PublicKey wire := make([]byte, DefaultMsgSize) n, err := packKeyWire(keywire, wire) if err != nil { return 0 } wire = wire[:n] for i, v := range wire { if i&1 != 0 { keytag += int(v) // must be larger than uint32 } else { keytag += int(v) << 8 } } keytag += (keytag >> 16) & 0xFFFF keytag &= 0xFFFF } return uint16(keytag) } // ToDS converts a DNSKEY record to a DS record. func (k *DNSKEY) ToDS(h uint8) *DS { if k == nil { return nil } ds := new(DS) ds.Hdr.Name = k.Hdr.Name ds.Hdr.Class = k.Hdr.Class ds.Hdr.Rrtype = TypeDS ds.Hdr.Ttl = k.Hdr.Ttl ds.Algorithm = k.Algorithm ds.DigestType = h ds.KeyTag = k.KeyTag() keywire := new(dnskeyWireFmt) keywire.Flags = k.Flags keywire.Protocol = k.Protocol keywire.Algorithm = k.Algorithm keywire.PublicKey = k.PublicKey wire := make([]byte, DefaultMsgSize) n, err := packKeyWire(keywire, wire) if err != nil { return nil } wire = wire[:n] owner := make([]byte, 255) off, err1 := PackDomainName(strings.ToLower(k.Hdr.Name), owner, 0, nil, false) if err1 != nil { return nil } owner = owner[:off] // RFC4034: // digest = digest_algorithm( DNSKEY owner name | DNSKEY RDATA); // "|" denotes concatenation // DNSKEY RDATA = Flags | Protocol | Algorithm | Public Key. var hash crypto.Hash switch h { case SHA1: hash = crypto.SHA1 case SHA256: hash = crypto.SHA256 case SHA384: hash = crypto.SHA384 case SHA512: hash = crypto.SHA512 default: return nil } s := hash.New() s.Write(owner) s.Write(wire) ds.Digest = hex.EncodeToString(s.Sum(nil)) return ds } // ToCDNSKEY converts a DNSKEY record to a CDNSKEY record. func (k *DNSKEY) ToCDNSKEY() *CDNSKEY { c := &CDNSKEY{DNSKEY: *k} c.Hdr = *k.Hdr.copyHeader() c.Hdr.Rrtype = TypeCDNSKEY return c } // ToCDS converts a DS record to a CDS record. func (d *DS) ToCDS() *CDS { c := &CDS{DS: *d} c.Hdr = *d.Hdr.copyHeader() c.Hdr.Rrtype = TypeCDS return c } // Sign signs an RRSet. The signature needs to be filled in with the values: // Inception, Expiration, KeyTag, SignerName and Algorithm. The rest is copied // from the RRset. Sign returns a non-nill error when the signing went OK. // There is no check if RRSet is a proper (RFC 2181) RRSet. If OrigTTL is non // zero, it is used as-is, otherwise the TTL of the RRset is used as the // OrigTTL. func (rr *RRSIG) Sign(k crypto.Signer, rrset []RR) error { if k == nil { return ErrPrivKey } // s.Inception and s.Expiration may be 0 (rollover etc.), the rest must be set if rr.KeyTag == 0 || len(rr.SignerName) == 0 || rr.Algorithm == 0 { return ErrKey } rr.Hdr.Rrtype = TypeRRSIG rr.Hdr.Name = rrset[0].Header().Name rr.Hdr.Class = rrset[0].Header().Class if rr.OrigTtl == 0 { // If set don't override rr.OrigTtl = rrset[0].Header().Ttl } rr.TypeCovered = rrset[0].Header().Rrtype rr.Labels = uint8(CountLabel(rrset[0].Header().Name)) if strings.HasPrefix(rrset[0].Header().Name, "*") { rr.Labels-- // wildcard, remove from label count } sigwire := new(rrsigWireFmt) sigwire.TypeCovered = rr.TypeCovered sigwire.Algorithm = rr.Algorithm sigwire.Labels = rr.Labels sigwire.OrigTtl = rr.OrigTtl sigwire.Expiration = rr.Expiration sigwire.Inception = rr.Inception sigwire.KeyTag = rr.KeyTag // For signing, lowercase this name sigwire.SignerName = strings.ToLower(rr.SignerName) // Create the desired binary blob signdata := make([]byte, DefaultMsgSize) n, err := packSigWire(sigwire, signdata) if err != nil { return err } signdata = signdata[:n] wire, err := rawSignatureData(rrset, rr) if err != nil { return err } hash, ok := AlgorithmToHash[rr.Algorithm] if !ok { return ErrAlg } switch rr.Algorithm { case ED25519: // ed25519 signs the raw message and performs hashing internally. // All other supported signature schemes operate over the pre-hashed // message, and thus ed25519 must be handled separately here. // // The raw message is passed directly into sign and crypto.Hash(0) is // used to signal to the crypto.Signer that the data has not been hashed. signature, err := sign(k, append(signdata, wire...), crypto.Hash(0), rr.Algorithm) if err != nil { return err } rr.Signature = toBase64(signature) default: h := hash.New() h.Write(signdata) h.Write(wire) signature, err := sign(k, h.Sum(nil), hash, rr.Algorithm) if err != nil { return err } rr.Signature = toBase64(signature) } return nil } func sign(k crypto.Signer, hashed []byte, hash crypto.Hash, alg uint8) ([]byte, error) { signature, err := k.Sign(rand.Reader, hashed, hash) if err != nil { return nil, err } switch alg { case RSASHA1, RSASHA1NSEC3SHA1, RSASHA256, RSASHA512: return signature, nil case ECDSAP256SHA256, ECDSAP384SHA384: ecdsaSignature := &struct { R, S *big.Int }{} if _, err := asn1.Unmarshal(signature, ecdsaSignature); err != nil { return nil, err } var intlen int switch alg { case ECDSAP256SHA256: intlen = 32 case ECDSAP384SHA384: intlen = 48 } signature := intToBytes(ecdsaSignature.R, intlen) signature = append(signature, intToBytes(ecdsaSignature.S, intlen)...) return signature, nil // There is no defined interface for what a DSA backed crypto.Signer returns case DSA, DSANSEC3SHA1: // t := divRoundUp(divRoundUp(p.PublicKey.Y.BitLen(), 8)-64, 8) // signature := []byte{byte(t)} // signature = append(signature, intToBytes(r1, 20)...) // signature = append(signature, intToBytes(s1, 20)...) // rr.Signature = signature case ED25519: return signature, nil } return nil, ErrAlg } // Verify validates an RRSet with the signature and key. This is only the // cryptographic test, the signature validity period must be checked separately. // This function copies the rdata of some RRs (to lowercase domain names) for the validation to work. func (rr *RRSIG) Verify(k *DNSKEY, rrset []RR) error { // First the easy checks if !IsRRset(rrset) { return ErrRRset } if rr.KeyTag != k.KeyTag() { return ErrKey } if rr.Hdr.Class != k.Hdr.Class { return ErrKey } if rr.Algorithm != k.Algorithm { return ErrKey } if strings.ToLower(rr.SignerName) != strings.ToLower(k.Hdr.Name) { return ErrKey } if k.Protocol != 3 { return ErrKey } // IsRRset checked that we have at least one RR and that the RRs in // the set have consistent type, class, and name. Also check that type and // class matches the RRSIG record. if rrset[0].Header().Class != rr.Hdr.Class { return ErrRRset } if rrset[0].Header().Rrtype != rr.TypeCovered { return ErrRRset } // RFC 4035 5.3.2. Reconstructing the Signed Data // Copy the sig, except the rrsig data sigwire := new(rrsigWireFmt) sigwire.TypeCovered = rr.TypeCovered sigwire.Algorithm = rr.Algorithm sigwire.Labels = rr.Labels sigwire.OrigTtl = rr.OrigTtl sigwire.Expiration = rr.Expiration sigwire.Inception = rr.Inception sigwire.KeyTag = rr.KeyTag sigwire.SignerName = strings.ToLower(rr.SignerName) // Create the desired binary blob signeddata := make([]byte, DefaultMsgSize) n, err := packSigWire(sigwire, signeddata) if err != nil { return err } signeddata = signeddata[:n] wire, err := rawSignatureData(rrset, rr) if err != nil { return err } sigbuf := rr.sigBuf() // Get the binary signature data if rr.Algorithm == PRIVATEDNS { // PRIVATEOID // TODO(miek) // remove the domain name and assume its ours? } hash, ok := AlgorithmToHash[rr.Algorithm] if !ok { return ErrAlg } switch rr.Algorithm { case RSASHA1, RSASHA1NSEC3SHA1, RSASHA256, RSASHA512, RSAMD5: // TODO(mg): this can be done quicker, ie. cache the pubkey data somewhere?? pubkey := k.publicKeyRSA() // Get the key if pubkey == nil { return ErrKey } h := hash.New() h.Write(signeddata) h.Write(wire) return rsa.VerifyPKCS1v15(pubkey, hash, h.Sum(nil), sigbuf) case ECDSAP256SHA256, ECDSAP384SHA384: pubkey := k.publicKeyECDSA() if pubkey == nil { return ErrKey } // Split sigbuf into the r and s coordinates r := new(big.Int).SetBytes(sigbuf[:len(sigbuf)/2]) s := new(big.Int).SetBytes(sigbuf[len(sigbuf)/2:]) h := hash.New() h.Write(signeddata) h.Write(wire) if ecdsa.Verify(pubkey, h.Sum(nil), r, s) { return nil } return ErrSig case ED25519: pubkey := k.publicKeyED25519() if pubkey == nil { return ErrKey } if ed25519.Verify(pubkey, append(signeddata, wire...), sigbuf) { return nil } return ErrSig default: return ErrAlg } } // ValidityPeriod uses RFC1982 serial arithmetic to calculate // if a signature period is valid. If t is the zero time, the // current time is taken other t is. Returns true if the signature // is valid at the given time, otherwise returns false. func (rr *RRSIG) ValidityPeriod(t time.Time) bool { var utc int64 if t.IsZero() { utc = time.Now().UTC().Unix() } else { utc = t.UTC().Unix() } modi := (int64(rr.Inception) - utc) / year68 mode := (int64(rr.Expiration) - utc) / year68 ti := int64(rr.Inception) + (modi * year68) te := int64(rr.Expiration) + (mode * year68) return ti <= utc && utc <= te } // Return the signatures base64 encodedig sigdata as a byte slice. func (rr *RRSIG) sigBuf() []byte { sigbuf, err := fromBase64([]byte(rr.Signature)) if err != nil { return nil } return sigbuf } // publicKeyRSA returns the RSA public key from a DNSKEY record. func (k *DNSKEY) publicKeyRSA() *rsa.PublicKey { keybuf, err := fromBase64([]byte(k.PublicKey)) if err != nil { return nil } // RFC 2537/3110, section 2. RSA Public KEY Resource Records // Length is in the 0th byte, unless its zero, then it // it in bytes 1 and 2 and its a 16 bit number explen := uint16(keybuf[0]) keyoff := 1 if explen == 0 { explen = uint16(keybuf[1])<<8 | uint16(keybuf[2]) keyoff = 3 } pubkey := new(rsa.PublicKey) pubkey.N = big.NewInt(0) shift := uint64((explen - 1) * 8) expo := uint64(0) for i := int(explen - 1); i > 0; i-- { expo += uint64(keybuf[keyoff+i]) << shift shift -= 8 } // Remainder expo += uint64(keybuf[keyoff]) if expo > (2<<31)+1 { // Larger expo than supported. // println("dns: F5 primes (or larger) are not supported") return nil } pubkey.E = int(expo) pubkey.N.SetBytes(keybuf[keyoff+int(explen):]) return pubkey } // publicKeyECDSA returns the Curve public key from the DNSKEY record. func (k *DNSKEY) publicKeyECDSA() *ecdsa.PublicKey { keybuf, err := fromBase64([]byte(k.PublicKey)) if err != nil { return nil } pubkey := new(ecdsa.PublicKey) switch k.Algorithm { case ECDSAP256SHA256: pubkey.Curve = elliptic.P256() if len(keybuf) != 64 { // wrongly encoded key return nil } case ECDSAP384SHA384: pubkey.Curve = elliptic.P384() if len(keybuf) != 96 { // Wrongly encoded key return nil } } pubkey.X = big.NewInt(0) pubkey.X.SetBytes(keybuf[:len(keybuf)/2]) pubkey.Y = big.NewInt(0) pubkey.Y.SetBytes(keybuf[len(keybuf)/2:]) return pubkey } func (k *DNSKEY) publicKeyDSA() *dsa.PublicKey { keybuf, err := fromBase64([]byte(k.PublicKey)) if err != nil { return nil } if len(keybuf) < 22 { return nil } t, keybuf := int(keybuf[0]), keybuf[1:] size := 64 + t*8 q, keybuf := keybuf[:20], keybuf[20:] if len(keybuf) != 3*size { return nil } p, keybuf := keybuf[:size], keybuf[size:] g, y := keybuf[:size], keybuf[size:] pubkey := new(dsa.PublicKey) pubkey.Parameters.Q = big.NewInt(0).SetBytes(q) pubkey.Parameters.P = big.NewInt(0).SetBytes(p) pubkey.Parameters.G = big.NewInt(0).SetBytes(g) pubkey.Y = big.NewInt(0).SetBytes(y) return pubkey } func (k *DNSKEY) publicKeyED25519() ed25519.PublicKey { keybuf, err := fromBase64([]byte(k.PublicKey)) if err != nil { return nil } if len(keybuf) != ed25519.PublicKeySize { return nil } return keybuf } type wireSlice [][]byte func (p wireSlice) Len() int { return len(p) } func (p wireSlice) Swap(i, j int) { p[i], p[j] = p[j], p[i] } func (p wireSlice) Less(i, j int) bool { _, ioff, _ := UnpackDomainName(p[i], 0) _, joff, _ := UnpackDomainName(p[j], 0) return bytes.Compare(p[i][ioff+10:], p[j][joff+10:]) < 0 } // Return the raw signature data. func rawSignatureData(rrset []RR, s *RRSIG) (buf []byte, err error) { wires := make(wireSlice, len(rrset)) for i, r := range rrset { r1 := r.copy() r1.Header().Ttl = s.OrigTtl labels := SplitDomainName(r1.Header().Name) // 6.2. Canonical RR Form. (4) - wildcards if len(labels) > int(s.Labels) { // Wildcard r1.Header().Name = "*." + strings.Join(labels[len(labels)-int(s.Labels):], ".") + "." } // RFC 4034: 6.2. Canonical RR Form. (2) - domain name to lowercase r1.Header().Name = strings.ToLower(r1.Header().Name) // 6.2. Canonical RR Form. (3) - domain rdata to lowercase. // NS, MD, MF, CNAME, SOA, MB, MG, MR, PTR, // HINFO, MINFO, MX, RP, AFSDB, RT, SIG, PX, NXT, NAPTR, KX, // SRV, DNAME, A6 // // RFC 6840 - Clarifications and Implementation Notes for DNS Security (DNSSEC): // Section 6.2 of [RFC4034] also erroneously lists HINFO as a record // that needs conversion to lowercase, and twice at that. Since HINFO // records contain no domain names, they are not subject to case // conversion. switch x := r1.(type) { case *NS: x.Ns = strings.ToLower(x.Ns) case *MD: x.Md = strings.ToLower(x.Md) case *MF: x.Mf = strings.ToLower(x.Mf) case *CNAME: x.Target = strings.ToLower(x.Target) case *SOA: x.Ns = strings.ToLower(x.Ns) x.Mbox = strings.ToLower(x.Mbox) case *MB: x.Mb = strings.ToLower(x.Mb) case *MG: x.Mg = strings.ToLower(x.Mg) case *MR: x.Mr = strings.ToLower(x.Mr) case *PTR: x.Ptr = strings.ToLower(x.Ptr) case *MINFO: x.Rmail = strings.ToLower(x.Rmail) x.Email = strings.ToLower(x.Email) case *MX: x.Mx = strings.ToLower(x.Mx) case *RP: x.Mbox = strings.ToLower(x.Mbox) x.Txt = strings.ToLower(x.Txt) case *AFSDB: x.Hostname = strings.ToLower(x.Hostname) case *RT: x.Host = strings.ToLower(x.Host) case *SIG: x.SignerName = strings.ToLower(x.SignerName) case *PX: x.Map822 = strings.ToLower(x.Map822) x.Mapx400 = strings.ToLower(x.Mapx400) case *NAPTR: x.Replacement = strings.ToLower(x.Replacement) case *KX: x.Exchanger = strings.ToLower(x.Exchanger) case *SRV: x.Target = strings.ToLower(x.Target) case *DNAME: x.Target = strings.ToLower(x.Target) } // 6.2. Canonical RR Form. (5) - origTTL wire := make([]byte, r1.len()+1) // +1 to be safe(r) off, err1 := PackRR(r1, wire, 0, nil, false) if err1 != nil { return nil, err1 } wire = wire[:off] wires[i] = wire } sort.Sort(wires) for i, wire := range wires { if i > 0 && bytes.Equal(wire, wires[i-1]) { continue } buf = append(buf, wire...) } return buf, nil } func packSigWire(sw *rrsigWireFmt, msg []byte) (int, error) { // copied from zmsg.go RRSIG packing off, err := packUint16(sw.TypeCovered, msg, 0) if err != nil { return off, err } off, err = packUint8(sw.Algorithm, msg, off) if err != nil { return off, err } off, err = packUint8(sw.Labels, msg, off) if err != nil { return off, err } off, err = packUint32(sw.OrigTtl, msg, off) if err != nil { return off, err } off, err = packUint32(sw.Expiration, msg, off) if err != nil { return off, err } off, err = packUint32(sw.Inception, msg, off) if err != nil { return off, err } off, err = packUint16(sw.KeyTag, msg, off) if err != nil { return off, err } off, err = PackDomainName(sw.SignerName, msg, off, nil, false) if err != nil { return off, err } return off, nil } func packKeyWire(dw *dnskeyWireFmt, msg []byte) (int, error) { // copied from zmsg.go DNSKEY packing off, err := packUint16(dw.Flags, msg, 0) if err != nil { return off, err } off, err = packUint8(dw.Protocol, msg, off) if err != nil { return off, err } off, err = packUint8(dw.Algorithm, msg, off) if err != nil { return off, err } off, err = packStringBase64(dw.PublicKey, msg, off) if err != nil { return off, err } return off, nil } golang-github-miekg-dns-1.0.4+ds/dnssec_keygen.go000066400000000000000000000103371325625637500217130ustar00rootroot00000000000000package dns import ( "crypto" "crypto/dsa" "crypto/ecdsa" "crypto/elliptic" "crypto/rand" "crypto/rsa" "math/big" "golang.org/x/crypto/ed25519" ) // Generate generates a DNSKEY of the given bit size. // The public part is put inside the DNSKEY record. // The Algorithm in the key must be set as this will define // what kind of DNSKEY will be generated. // The ECDSA algorithms imply a fixed keysize, in that case // bits should be set to the size of the algorithm. func (k *DNSKEY) Generate(bits int) (crypto.PrivateKey, error) { switch k.Algorithm { case DSA, DSANSEC3SHA1: if bits != 1024 { return nil, ErrKeySize } case RSAMD5, RSASHA1, RSASHA256, RSASHA1NSEC3SHA1: if bits < 512 || bits > 4096 { return nil, ErrKeySize } case RSASHA512: if bits < 1024 || bits > 4096 { return nil, ErrKeySize } case ECDSAP256SHA256: if bits != 256 { return nil, ErrKeySize } case ECDSAP384SHA384: if bits != 384 { return nil, ErrKeySize } case ED25519: if bits != 256 { return nil, ErrKeySize } } switch k.Algorithm { case DSA, DSANSEC3SHA1: params := new(dsa.Parameters) if err := dsa.GenerateParameters(params, rand.Reader, dsa.L1024N160); err != nil { return nil, err } priv := new(dsa.PrivateKey) priv.PublicKey.Parameters = *params err := dsa.GenerateKey(priv, rand.Reader) if err != nil { return nil, err } k.setPublicKeyDSA(params.Q, params.P, params.G, priv.PublicKey.Y) return priv, nil case RSAMD5, RSASHA1, RSASHA256, RSASHA512, RSASHA1NSEC3SHA1: priv, err := rsa.GenerateKey(rand.Reader, bits) if err != nil { return nil, err } k.setPublicKeyRSA(priv.PublicKey.E, priv.PublicKey.N) return priv, nil case ECDSAP256SHA256, ECDSAP384SHA384: var c elliptic.Curve switch k.Algorithm { case ECDSAP256SHA256: c = elliptic.P256() case ECDSAP384SHA384: c = elliptic.P384() } priv, err := ecdsa.GenerateKey(c, rand.Reader) if err != nil { return nil, err } k.setPublicKeyECDSA(priv.PublicKey.X, priv.PublicKey.Y) return priv, nil case ED25519: pub, priv, err := ed25519.GenerateKey(rand.Reader) if err != nil { return nil, err } k.setPublicKeyED25519(pub) return priv, nil default: return nil, ErrAlg } } // Set the public key (the value E and N) func (k *DNSKEY) setPublicKeyRSA(_E int, _N *big.Int) bool { if _E == 0 || _N == nil { return false } buf := exponentToBuf(_E) buf = append(buf, _N.Bytes()...) k.PublicKey = toBase64(buf) return true } // Set the public key for Elliptic Curves func (k *DNSKEY) setPublicKeyECDSA(_X, _Y *big.Int) bool { if _X == nil || _Y == nil { return false } var intlen int switch k.Algorithm { case ECDSAP256SHA256: intlen = 32 case ECDSAP384SHA384: intlen = 48 } k.PublicKey = toBase64(curveToBuf(_X, _Y, intlen)) return true } // Set the public key for DSA func (k *DNSKEY) setPublicKeyDSA(_Q, _P, _G, _Y *big.Int) bool { if _Q == nil || _P == nil || _G == nil || _Y == nil { return false } buf := dsaToBuf(_Q, _P, _G, _Y) k.PublicKey = toBase64(buf) return true } // Set the public key for Ed25519 func (k *DNSKEY) setPublicKeyED25519(_K ed25519.PublicKey) bool { if _K == nil { return false } k.PublicKey = toBase64(_K) return true } // Set the public key (the values E and N) for RSA // RFC 3110: Section 2. RSA Public KEY Resource Records func exponentToBuf(_E int) []byte { var buf []byte i := big.NewInt(int64(_E)).Bytes() if len(i) < 256 { buf = make([]byte, 1, 1+len(i)) buf[0] = uint8(len(i)) } else { buf = make([]byte, 3, 3+len(i)) buf[0] = 0 buf[1] = uint8(len(i) >> 8) buf[2] = uint8(len(i)) } buf = append(buf, i...) return buf } // Set the public key for X and Y for Curve. The two // values are just concatenated. func curveToBuf(_X, _Y *big.Int, intlen int) []byte { buf := intToBytes(_X, intlen) buf = append(buf, intToBytes(_Y, intlen)...) return buf } // Set the public key for X and Y for Curve. The two // values are just concatenated. func dsaToBuf(_Q, _P, _G, _Y *big.Int) []byte { t := divRoundUp(divRoundUp(_G.BitLen(), 8)-64, 8) buf := []byte{byte(t)} buf = append(buf, intToBytes(_Q, 20)...) buf = append(buf, intToBytes(_P, 64+t*8)...) buf = append(buf, intToBytes(_G, 64+t*8)...) buf = append(buf, intToBytes(_Y, 64+t*8)...) return buf } golang-github-miekg-dns-1.0.4+ds/dnssec_keyscan.go000066400000000000000000000153651325625637500220740ustar00rootroot00000000000000package dns import ( "bytes" "crypto" "crypto/dsa" "crypto/ecdsa" "crypto/rsa" "io" "math/big" "strconv" "strings" "golang.org/x/crypto/ed25519" ) // NewPrivateKey returns a PrivateKey by parsing the string s. // s should be in the same form of the BIND private key files. func (k *DNSKEY) NewPrivateKey(s string) (crypto.PrivateKey, error) { if s == "" || s[len(s)-1] != '\n' { // We need a closing newline return k.ReadPrivateKey(strings.NewReader(s+"\n"), "") } return k.ReadPrivateKey(strings.NewReader(s), "") } // ReadPrivateKey reads a private key from the io.Reader q. The string file is // only used in error reporting. // The public key must be known, because some cryptographic algorithms embed // the public inside the privatekey. func (k *DNSKEY) ReadPrivateKey(q io.Reader, file string) (crypto.PrivateKey, error) { m, err := parseKey(q, file) if m == nil { return nil, err } if _, ok := m["private-key-format"]; !ok { return nil, ErrPrivKey } if m["private-key-format"] != "v1.2" && m["private-key-format"] != "v1.3" { return nil, ErrPrivKey } // TODO(mg): check if the pubkey matches the private key algo, err := strconv.ParseUint(strings.SplitN(m["algorithm"], " ", 2)[0], 10, 8) if err != nil { return nil, ErrPrivKey } switch uint8(algo) { case DSA: priv, err := readPrivateKeyDSA(m) if err != nil { return nil, err } pub := k.publicKeyDSA() if pub == nil { return nil, ErrKey } priv.PublicKey = *pub return priv, nil case RSAMD5: fallthrough case RSASHA1: fallthrough case RSASHA1NSEC3SHA1: fallthrough case RSASHA256: fallthrough case RSASHA512: priv, err := readPrivateKeyRSA(m) if err != nil { return nil, err } pub := k.publicKeyRSA() if pub == nil { return nil, ErrKey } priv.PublicKey = *pub return priv, nil case ECCGOST: return nil, ErrPrivKey case ECDSAP256SHA256: fallthrough case ECDSAP384SHA384: priv, err := readPrivateKeyECDSA(m) if err != nil { return nil, err } pub := k.publicKeyECDSA() if pub == nil { return nil, ErrKey } priv.PublicKey = *pub return priv, nil case ED25519: return readPrivateKeyED25519(m) default: return nil, ErrPrivKey } } // Read a private key (file) string and create a public key. Return the private key. func readPrivateKeyRSA(m map[string]string) (*rsa.PrivateKey, error) { p := new(rsa.PrivateKey) p.Primes = []*big.Int{nil, nil} for k, v := range m { switch k { case "modulus", "publicexponent", "privateexponent", "prime1", "prime2": v1, err := fromBase64([]byte(v)) if err != nil { return nil, err } switch k { case "modulus": p.PublicKey.N = big.NewInt(0) p.PublicKey.N.SetBytes(v1) case "publicexponent": i := big.NewInt(0) i.SetBytes(v1) p.PublicKey.E = int(i.Int64()) // int64 should be large enough case "privateexponent": p.D = big.NewInt(0) p.D.SetBytes(v1) case "prime1": p.Primes[0] = big.NewInt(0) p.Primes[0].SetBytes(v1) case "prime2": p.Primes[1] = big.NewInt(0) p.Primes[1].SetBytes(v1) } case "exponent1", "exponent2", "coefficient": // not used in Go (yet) case "created", "publish", "activate": // not used in Go (yet) } } return p, nil } func readPrivateKeyDSA(m map[string]string) (*dsa.PrivateKey, error) { p := new(dsa.PrivateKey) p.X = big.NewInt(0) for k, v := range m { switch k { case "private_value(x)": v1, err := fromBase64([]byte(v)) if err != nil { return nil, err } p.X.SetBytes(v1) case "created", "publish", "activate": /* not used in Go (yet) */ } } return p, nil } func readPrivateKeyECDSA(m map[string]string) (*ecdsa.PrivateKey, error) { p := new(ecdsa.PrivateKey) p.D = big.NewInt(0) // TODO: validate that the required flags are present for k, v := range m { switch k { case "privatekey": v1, err := fromBase64([]byte(v)) if err != nil { return nil, err } p.D.SetBytes(v1) case "created", "publish", "activate": /* not used in Go (yet) */ } } return p, nil } func readPrivateKeyED25519(m map[string]string) (ed25519.PrivateKey, error) { var p ed25519.PrivateKey // TODO: validate that the required flags are present for k, v := range m { switch k { case "privatekey": p1, err := fromBase64([]byte(v)) if err != nil { return nil, err } if len(p1) != 32 { return nil, ErrPrivKey } // RFC 8080 and Golang's x/crypto/ed25519 differ as to how the // private keys are represented. RFC 8080 specifies that private // keys be stored solely as the seed value (p1 above) while the // ed25519 package represents them as the seed value concatenated // to the public key, which is derived from the seed value. // // ed25519.GenerateKey reads exactly 32 bytes from the passed in // io.Reader and uses them as the seed. It also derives the // public key and produces a compatible private key. _, p, err = ed25519.GenerateKey(bytes.NewReader(p1)) if err != nil { return nil, err } case "created", "publish", "activate": /* not used in Go (yet) */ } } return p, nil } // parseKey reads a private key from r. It returns a map[string]string, // with the key-value pairs, or an error when the file is not correct. func parseKey(r io.Reader, file string) (map[string]string, error) { s, cancel := scanInit(r) m := make(map[string]string) c := make(chan lex) k := "" defer func() { cancel() // zlexer can send up to two tokens, the next one and possibly 1 remainders. // Do a non-blocking read. _, ok := <-c _, ok = <-c if !ok { // too bad } }() // Start the lexer go klexer(s, c) for l := range c { // It should alternate switch l.value { case zKey: k = l.token case zValue: if k == "" { return nil, &ParseError{file, "no private key seen", l} } //println("Setting", strings.ToLower(k), "to", l.token, "b") m[strings.ToLower(k)] = l.token k = "" } } return m, nil } // klexer scans the sourcefile and returns tokens on the channel c. func klexer(s *scan, c chan lex) { var l lex str := "" // Hold the current read text commt := false key := true x, err := s.tokenText() defer close(c) for err == nil { l.column = s.position.Column l.line = s.position.Line switch x { case ':': if commt { break } l.token = str if key { l.value = zKey c <- l // Next token is a space, eat it s.tokenText() key = false str = "" } else { l.value = zValue } case ';': commt = true case '\n': if commt { // Reset a comment commt = false } l.value = zValue l.token = str c <- l str = "" commt = false key = true default: if commt { break } str += string(x) } x, err = s.tokenText() } if len(str) > 0 { // Send remainder l.token = str l.value = zValue c <- l } } golang-github-miekg-dns-1.0.4+ds/dnssec_privkey.go000066400000000000000000000056061325625637500221250ustar00rootroot00000000000000package dns import ( "crypto" "crypto/dsa" "crypto/ecdsa" "crypto/rsa" "math/big" "strconv" "golang.org/x/crypto/ed25519" ) const format = "Private-key-format: v1.3\n" // PrivateKeyString converts a PrivateKey to a string. This string has the same // format as the private-key-file of BIND9 (Private-key-format: v1.3). // It needs some info from the key (the algorithm), so its a method of the DNSKEY // It supports rsa.PrivateKey, ecdsa.PrivateKey and dsa.PrivateKey func (r *DNSKEY) PrivateKeyString(p crypto.PrivateKey) string { algorithm := strconv.Itoa(int(r.Algorithm)) algorithm += " (" + AlgorithmToString[r.Algorithm] + ")" switch p := p.(type) { case *rsa.PrivateKey: modulus := toBase64(p.PublicKey.N.Bytes()) e := big.NewInt(int64(p.PublicKey.E)) publicExponent := toBase64(e.Bytes()) privateExponent := toBase64(p.D.Bytes()) prime1 := toBase64(p.Primes[0].Bytes()) prime2 := toBase64(p.Primes[1].Bytes()) // Calculate Exponent1/2 and Coefficient as per: http://en.wikipedia.org/wiki/RSA#Using_the_Chinese_remainder_algorithm // and from: http://code.google.com/p/go/issues/detail?id=987 one := big.NewInt(1) p1 := big.NewInt(0).Sub(p.Primes[0], one) q1 := big.NewInt(0).Sub(p.Primes[1], one) exp1 := big.NewInt(0).Mod(p.D, p1) exp2 := big.NewInt(0).Mod(p.D, q1) coeff := big.NewInt(0).ModInverse(p.Primes[1], p.Primes[0]) exponent1 := toBase64(exp1.Bytes()) exponent2 := toBase64(exp2.Bytes()) coefficient := toBase64(coeff.Bytes()) return format + "Algorithm: " + algorithm + "\n" + "Modulus: " + modulus + "\n" + "PublicExponent: " + publicExponent + "\n" + "PrivateExponent: " + privateExponent + "\n" + "Prime1: " + prime1 + "\n" + "Prime2: " + prime2 + "\n" + "Exponent1: " + exponent1 + "\n" + "Exponent2: " + exponent2 + "\n" + "Coefficient: " + coefficient + "\n" case *ecdsa.PrivateKey: var intlen int switch r.Algorithm { case ECDSAP256SHA256: intlen = 32 case ECDSAP384SHA384: intlen = 48 } private := toBase64(intToBytes(p.D, intlen)) return format + "Algorithm: " + algorithm + "\n" + "PrivateKey: " + private + "\n" case *dsa.PrivateKey: T := divRoundUp(divRoundUp(p.PublicKey.Parameters.G.BitLen(), 8)-64, 8) prime := toBase64(intToBytes(p.PublicKey.Parameters.P, 64+T*8)) subprime := toBase64(intToBytes(p.PublicKey.Parameters.Q, 20)) base := toBase64(intToBytes(p.PublicKey.Parameters.G, 64+T*8)) priv := toBase64(intToBytes(p.X, 20)) pub := toBase64(intToBytes(p.PublicKey.Y, 64+T*8)) return format + "Algorithm: " + algorithm + "\n" + "Prime(p): " + prime + "\n" + "Subprime(q): " + subprime + "\n" + "Base(g): " + base + "\n" + "Private_value(x): " + priv + "\n" + "Public_value(y): " + pub + "\n" case ed25519.PrivateKey: private := toBase64(p[:32]) return format + "Algorithm: " + algorithm + "\n" + "PrivateKey: " + private + "\n" default: return "" } } golang-github-miekg-dns-1.0.4+ds/dnssec_test.go000066400000000000000000000653171325625637500214200ustar00rootroot00000000000000package dns import ( "crypto" "crypto/ecdsa" "crypto/rsa" "reflect" "strings" "testing" "time" "golang.org/x/crypto/ed25519" ) func getKey() *DNSKEY { key := new(DNSKEY) key.Hdr.Name = "miek.nl." key.Hdr.Class = ClassINET key.Hdr.Ttl = 14400 key.Flags = 256 key.Protocol = 3 key.Algorithm = RSASHA256 key.PublicKey = "AwEAAcNEU67LJI5GEgF9QLNqLO1SMq1EdoQ6E9f85ha0k0ewQGCblyW2836GiVsm6k8Kr5ECIoMJ6fZWf3CQSQ9ycWfTyOHfmI3eQ/1Covhb2y4bAmL/07PhrL7ozWBW3wBfM335Ft9xjtXHPy7ztCbV9qZ4TVDTW/Iyg0PiwgoXVesz" return key } func getSoa() *SOA { soa := new(SOA) soa.Hdr = RR_Header{"miek.nl.", TypeSOA, ClassINET, 14400, 0} soa.Ns = "open.nlnetlabs.nl." soa.Mbox = "miekg.atoom.net." soa.Serial = 1293945905 soa.Refresh = 14400 soa.Retry = 3600 soa.Expire = 604800 soa.Minttl = 86400 return soa } func TestSecure(t *testing.T) { soa := getSoa() sig := new(RRSIG) sig.Hdr = RR_Header{"miek.nl.", TypeRRSIG, ClassINET, 14400, 0} sig.TypeCovered = TypeSOA sig.Algorithm = RSASHA256 sig.Labels = 2 sig.Expiration = 1296534305 // date -u '+%s' -d"2011-02-01 04:25:05" sig.Inception = 1293942305 // date -u '+%s' -d"2011-01-02 04:25:05" sig.OrigTtl = 14400 sig.KeyTag = 12051 sig.SignerName = "miek.nl." sig.Signature = "oMCbslaAVIp/8kVtLSms3tDABpcPRUgHLrOR48OOplkYo+8TeEGWwkSwaz/MRo2fB4FxW0qj/hTlIjUGuACSd+b1wKdH5GvzRJc2pFmxtCbm55ygAh4EUL0F6U5cKtGJGSXxxg6UFCQ0doJCmiGFa78LolaUOXImJrk6AFrGa0M=" key := new(DNSKEY) key.Hdr.Name = "miek.nl." key.Hdr.Class = ClassINET key.Hdr.Ttl = 14400 key.Flags = 256 key.Protocol = 3 key.Algorithm = RSASHA256 key.PublicKey = "AwEAAcNEU67LJI5GEgF9QLNqLO1SMq1EdoQ6E9f85ha0k0ewQGCblyW2836GiVsm6k8Kr5ECIoMJ6fZWf3CQSQ9ycWfTyOHfmI3eQ/1Covhb2y4bAmL/07PhrL7ozWBW3wBfM335Ft9xjtXHPy7ztCbV9qZ4TVDTW/Iyg0PiwgoXVesz" // It should validate. Period is checked separately, so this will keep on working if sig.Verify(key, []RR{soa}) != nil { t.Error("failure to validate") } } func TestSignature(t *testing.T) { sig := new(RRSIG) sig.Hdr.Name = "miek.nl." sig.Hdr.Class = ClassINET sig.Hdr.Ttl = 3600 sig.TypeCovered = TypeDNSKEY sig.Algorithm = RSASHA1 sig.Labels = 2 sig.OrigTtl = 4000 sig.Expiration = 1000 //Thu Jan 1 02:06:40 CET 1970 sig.Inception = 800 //Thu Jan 1 01:13:20 CET 1970 sig.KeyTag = 34641 sig.SignerName = "miek.nl." sig.Signature = "AwEAAaHIwpx3w4VHKi6i1LHnTaWeHCL154Jug0Rtc9ji5qwPXpBo6A5sRv7cSsPQKPIwxLpyCrbJ4mr2L0EPOdvP6z6YfljK2ZmTbogU9aSU2fiq/4wjxbdkLyoDVgtO+JsxNN4bjr4WcWhsmk1Hg93FV9ZpkWb0Tbad8DFqNDzr//kZ" // Should not be valid if sig.ValidityPeriod(time.Now()) { t.Error("should not be valid") } sig.Inception = 315565800 //Tue Jan 1 10:10:00 CET 1980 sig.Expiration = 4102477800 //Fri Jan 1 10:10:00 CET 2100 if !sig.ValidityPeriod(time.Now()) { t.Error("should be valid") } } func TestSignVerify(t *testing.T) { // The record we want to sign soa := new(SOA) soa.Hdr = RR_Header{"miek.nl.", TypeSOA, ClassINET, 14400, 0} soa.Ns = "open.nlnetlabs.nl." soa.Mbox = "miekg.atoom.net." soa.Serial = 1293945905 soa.Refresh = 14400 soa.Retry = 3600 soa.Expire = 604800 soa.Minttl = 86400 soa1 := new(SOA) soa1.Hdr = RR_Header{"*.miek.nl.", TypeSOA, ClassINET, 14400, 0} soa1.Ns = "open.nlnetlabs.nl." soa1.Mbox = "miekg.atoom.net." soa1.Serial = 1293945905 soa1.Refresh = 14400 soa1.Retry = 3600 soa1.Expire = 604800 soa1.Minttl = 86400 srv := new(SRV) srv.Hdr = RR_Header{"srv.miek.nl.", TypeSRV, ClassINET, 14400, 0} srv.Port = 1000 srv.Weight = 800 srv.Target = "web1.miek.nl." hinfo := &HINFO{ Hdr: RR_Header{ Name: "miek.nl.", Rrtype: TypeHINFO, Class: ClassINET, Ttl: 3789, }, Cpu: "X", Os: "Y", } // With this key key := new(DNSKEY) key.Hdr.Rrtype = TypeDNSKEY key.Hdr.Name = "miek.nl." key.Hdr.Class = ClassINET key.Hdr.Ttl = 14400 key.Flags = 256 key.Protocol = 3 key.Algorithm = RSASHA256 privkey, _ := key.Generate(512) // Fill in the values of the Sig, before signing sig := new(RRSIG) sig.Hdr = RR_Header{"miek.nl.", TypeRRSIG, ClassINET, 14400, 0} sig.TypeCovered = soa.Hdr.Rrtype sig.Labels = uint8(CountLabel(soa.Hdr.Name)) // works for all 3 sig.OrigTtl = soa.Hdr.Ttl sig.Expiration = 1296534305 // date -u '+%s' -d"2011-02-01 04:25:05" sig.Inception = 1293942305 // date -u '+%s' -d"2011-01-02 04:25:05" sig.KeyTag = key.KeyTag() // Get the keyfrom the Key sig.SignerName = key.Hdr.Name sig.Algorithm = RSASHA256 for _, r := range []RR{soa, soa1, srv, hinfo} { if err := sig.Sign(privkey.(*rsa.PrivateKey), []RR{r}); err != nil { t.Error("failure to sign the record:", err) continue } if err := sig.Verify(key, []RR{r}); err != nil { t.Errorf("failure to validate: %s", r.Header().Name) continue } } } func Test65534(t *testing.T) { t6 := new(RFC3597) t6.Hdr = RR_Header{"miek.nl.", 65534, ClassINET, 14400, 0} t6.Rdata = "505D870001" key := new(DNSKEY) key.Hdr.Name = "miek.nl." key.Hdr.Rrtype = TypeDNSKEY key.Hdr.Class = ClassINET key.Hdr.Ttl = 14400 key.Flags = 256 key.Protocol = 3 key.Algorithm = RSASHA256 privkey, _ := key.Generate(1024) sig := new(RRSIG) sig.Hdr = RR_Header{"miek.nl.", TypeRRSIG, ClassINET, 14400, 0} sig.TypeCovered = t6.Hdr.Rrtype sig.Labels = uint8(CountLabel(t6.Hdr.Name)) sig.OrigTtl = t6.Hdr.Ttl sig.Expiration = 1296534305 // date -u '+%s' -d"2011-02-01 04:25:05" sig.Inception = 1293942305 // date -u '+%s' -d"2011-01-02 04:25:05" sig.KeyTag = key.KeyTag() sig.SignerName = key.Hdr.Name sig.Algorithm = RSASHA256 if err := sig.Sign(privkey.(*rsa.PrivateKey), []RR{t6}); err != nil { t.Error(err) t.Error("failure to sign the TYPE65534 record") } if err := sig.Verify(key, []RR{t6}); err != nil { t.Error(err) t.Errorf("failure to validate %s", t6.Header().Name) } } func TestDnskey(t *testing.T) { pubkey, err := ReadRR(strings.NewReader(` miek.nl. IN DNSKEY 256 3 10 AwEAAZuMCu2FdugHkTrXYgl5qixvcDw1aDDlvL46/xJKbHBAHY16fNUb2b65cwko2Js/aJxUYJbZk5dwCDZxYfrfbZVtDPQuc3o8QaChVxC7/JYz2AHc9qHvqQ1j4VrH71RWINlQo6VYjzN/BGpMhOZoZOEwzp1HfsOE3lNYcoWU1smL ;{id = 5240 (zsk), size = 1024b} `), "Kmiek.nl.+010+05240.key") if err != nil { t.Fatal(err) } privStr := `Private-key-format: v1.3 Algorithm: 10 (RSASHA512) Modulus: m4wK7YV26AeROtdiCXmqLG9wPDVoMOW8vjr/EkpscEAdjXp81RvZvrlzCSjYmz9onFRgltmTl3AINnFh+t9tlW0M9C5zejxBoKFXELv8ljPYAdz2oe+pDWPhWsfvVFYg2VCjpViPM38EakyE5mhk4TDOnUd+w4TeU1hyhZTWyYs= PublicExponent: AQAB PrivateExponent: UfCoIQ/Z38l8vB6SSqOI/feGjHEl/fxIPX4euKf0D/32k30fHbSaNFrFOuIFmWMB3LimWVEs6u3dpbB9CQeCVg7hwU5puG7OtuiZJgDAhNeOnxvo5btp4XzPZrJSxR4WNQnwIiYWbl0aFlL1VGgHC/3By89ENZyWaZcMLW4KGWE= Prime1: yxwC6ogAu8aVcDx2wg1V0b5M5P6jP8qkRFVMxWNTw60Vkn+ECvw6YAZZBHZPaMyRYZLzPgUlyYRd0cjupy4+fQ== Prime2: xA1bF8M0RTIQ6+A11AoVG6GIR/aPGg5sogRkIZ7ID/sF6g9HMVU/CM2TqVEBJLRPp73cv6ZeC3bcqOCqZhz+pw== Exponent1: xzkblyZ96bGYxTVZm2/vHMOXswod4KWIyMoOepK6B/ZPcZoIT6omLCgtypWtwHLfqyCz3MK51Nc0G2EGzg8rFQ== Exponent2: Pu5+mCEb7T5F+kFNZhQadHUklt0JUHbi3hsEvVoHpEGSw3BGDQrtIflDde0/rbWHgDPM4WQY+hscd8UuTXrvLw== Coefficient: UuRoNqe7YHnKmQzE6iDWKTMIWTuoqqrFAmXPmKQnC+Y+BQzOVEHUo9bXdDnoI9hzXP1gf8zENMYwYLeWpuYlFQ== ` privkey, err := pubkey.(*DNSKEY).ReadPrivateKey(strings.NewReader(privStr), "Kmiek.nl.+010+05240.private") if err != nil { t.Fatal(err) } if pubkey.(*DNSKEY).PublicKey != "AwEAAZuMCu2FdugHkTrXYgl5qixvcDw1aDDlvL46/xJKbHBAHY16fNUb2b65cwko2Js/aJxUYJbZk5dwCDZxYfrfbZVtDPQuc3o8QaChVxC7/JYz2AHc9qHvqQ1j4VrH71RWINlQo6VYjzN/BGpMhOZoZOEwzp1HfsOE3lNYcoWU1smL" { t.Error("pubkey is not what we've read") } if pubkey.(*DNSKEY).PrivateKeyString(privkey) != privStr { t.Error("privkey is not what we've read") t.Errorf("%v", pubkey.(*DNSKEY).PrivateKeyString(privkey)) } } func TestTag(t *testing.T) { key := new(DNSKEY) key.Hdr.Name = "miek.nl." key.Hdr.Rrtype = TypeDNSKEY key.Hdr.Class = ClassINET key.Hdr.Ttl = 3600 key.Flags = 256 key.Protocol = 3 key.Algorithm = RSASHA256 key.PublicKey = "AwEAAcNEU67LJI5GEgF9QLNqLO1SMq1EdoQ6E9f85ha0k0ewQGCblyW2836GiVsm6k8Kr5ECIoMJ6fZWf3CQSQ9ycWfTyOHfmI3eQ/1Covhb2y4bAmL/07PhrL7ozWBW3wBfM335Ft9xjtXHPy7ztCbV9qZ4TVDTW/Iyg0PiwgoXVesz" tag := key.KeyTag() if tag != 12051 { t.Errorf("wrong key tag: %d for key %v", tag, key) } } func TestKeyRSA(t *testing.T) { if testing.Short() { t.Skip("skipping test in short mode.") } key := new(DNSKEY) key.Hdr.Name = "miek.nl." key.Hdr.Rrtype = TypeDNSKEY key.Hdr.Class = ClassINET key.Hdr.Ttl = 3600 key.Flags = 256 key.Protocol = 3 key.Algorithm = RSASHA256 priv, _ := key.Generate(2048) soa := new(SOA) soa.Hdr = RR_Header{"miek.nl.", TypeSOA, ClassINET, 14400, 0} soa.Ns = "open.nlnetlabs.nl." soa.Mbox = "miekg.atoom.net." soa.Serial = 1293945905 soa.Refresh = 14400 soa.Retry = 3600 soa.Expire = 604800 soa.Minttl = 86400 sig := new(RRSIG) sig.Hdr = RR_Header{"miek.nl.", TypeRRSIG, ClassINET, 14400, 0} sig.TypeCovered = TypeSOA sig.Algorithm = RSASHA256 sig.Labels = 2 sig.Expiration = 1296534305 // date -u '+%s' -d"2011-02-01 04:25:05" sig.Inception = 1293942305 // date -u '+%s' -d"2011-01-02 04:25:05" sig.OrigTtl = soa.Hdr.Ttl sig.KeyTag = key.KeyTag() sig.SignerName = key.Hdr.Name if err := sig.Sign(priv.(*rsa.PrivateKey), []RR{soa}); err != nil { t.Error("failed to sign") return } if err := sig.Verify(key, []RR{soa}); err != nil { t.Error("failed to verify") } } func TestKeyToDS(t *testing.T) { key := new(DNSKEY) key.Hdr.Name = "miek.nl." key.Hdr.Rrtype = TypeDNSKEY key.Hdr.Class = ClassINET key.Hdr.Ttl = 3600 key.Flags = 256 key.Protocol = 3 key.Algorithm = RSASHA256 key.PublicKey = "AwEAAcNEU67LJI5GEgF9QLNqLO1SMq1EdoQ6E9f85ha0k0ewQGCblyW2836GiVsm6k8Kr5ECIoMJ6fZWf3CQSQ9ycWfTyOHfmI3eQ/1Covhb2y4bAmL/07PhrL7ozWBW3wBfM335Ft9xjtXHPy7ztCbV9qZ4TVDTW/Iyg0PiwgoXVesz" ds := key.ToDS(SHA1) if strings.ToUpper(ds.Digest) != "B5121BDB5B8D86D0CC5FFAFBAAABE26C3E20BAC1" { t.Errorf("wrong DS digest for SHA1\n%v", ds) } } func TestSignRSA(t *testing.T) { pub := "miek.nl. IN DNSKEY 256 3 5 AwEAAb+8lGNCxJgLS8rYVer6EnHVuIkQDghdjdtewDzU3G5R7PbMbKVRvH2Ma7pQyYceoaqWZQirSj72euPWfPxQnMy9ucCylA+FuH9cSjIcPf4PqJfdupHk9X6EBYjxrCLY4p1/yBwgyBIRJtZtAqM3ceAH2WovEJD6rTtOuHo5AluJ" priv := `Private-key-format: v1.3 Algorithm: 5 (RSASHA1) Modulus: v7yUY0LEmAtLythV6voScdW4iRAOCF2N217APNTcblHs9sxspVG8fYxrulDJhx6hqpZlCKtKPvZ649Z8/FCczL25wLKUD4W4f1xKMhw9/g+ol926keT1foQFiPGsItjinX/IHCDIEhEm1m0Cozdx4AfZai8QkPqtO064ejkCW4k= PublicExponent: AQAB PrivateExponent: YPwEmwjk5HuiROKU4xzHQ6l1hG8Iiha4cKRG3P5W2b66/EN/GUh07ZSf0UiYB67o257jUDVEgwCuPJz776zfApcCB4oGV+YDyEu7Hp/rL8KcSN0la0k2r9scKwxTp4BTJT23zyBFXsV/1wRDK1A5NxsHPDMYi2SoK63Enm/1ptk= Prime1: /wjOG+fD0ybNoSRn7nQ79udGeR1b0YhUA5mNjDx/x2fxtIXzygYk0Rhx9QFfDy6LOBvz92gbNQlzCLz3DJt5hw== Prime2: wHZsJ8OGhkp5p3mrJFZXMDc2mbYusDVTA+t+iRPdS797Tj0pjvU2HN4vTnTj8KBQp6hmnY7dLp9Y1qserySGbw== Exponent1: N0A7FsSRIg+IAN8YPQqlawoTtG1t1OkJ+nWrurPootScApX6iMvn8fyvw3p2k51rv84efnzpWAYiC8SUaQDNxQ== Exponent2: SvuYRaGyvo0zemE3oS+WRm2scxR8eiA8WJGeOc+obwOKCcBgeZblXzfdHGcEC1KaOcetOwNW/vwMA46lpLzJNw== Coefficient: 8+7ZN/JgByqv0NfULiFKTjtyegUcijRuyij7yNxYbCBneDvZGxJwKNi4YYXWx743pcAj4Oi4Oh86gcmxLs+hGw== Created: 20110302104537 Publish: 20110302104537 Activate: 20110302104537` xk := testRR(pub) k := xk.(*DNSKEY) p, err := k.NewPrivateKey(priv) if err != nil { t.Error(err) } switch priv := p.(type) { case *rsa.PrivateKey: if 65537 != priv.PublicKey.E { t.Error("exponenent should be 65537") } default: t.Errorf("we should have read an RSA key: %v", priv) } if k.KeyTag() != 37350 { t.Errorf("keytag should be 37350, got %d %v", k.KeyTag(), k) } soa := new(SOA) soa.Hdr = RR_Header{"miek.nl.", TypeSOA, ClassINET, 14400, 0} soa.Ns = "open.nlnetlabs.nl." soa.Mbox = "miekg.atoom.net." soa.Serial = 1293945905 soa.Refresh = 14400 soa.Retry = 3600 soa.Expire = 604800 soa.Minttl = 86400 sig := new(RRSIG) sig.Hdr = RR_Header{"miek.nl.", TypeRRSIG, ClassINET, 14400, 0} sig.Expiration = 1296534305 // date -u '+%s' -d"2011-02-01 04:25:05" sig.Inception = 1293942305 // date -u '+%s' -d"2011-01-02 04:25:05" sig.KeyTag = k.KeyTag() sig.SignerName = k.Hdr.Name sig.Algorithm = k.Algorithm sig.Sign(p.(*rsa.PrivateKey), []RR{soa}) if sig.Signature != "D5zsobpQcmMmYsUMLxCVEtgAdCvTu8V/IEeP4EyLBjqPJmjt96bwM9kqihsccofA5LIJ7DN91qkCORjWSTwNhzCv7bMyr2o5vBZElrlpnRzlvsFIoAZCD9xg6ZY7ZyzUJmU6IcTwG4v3xEYajcpbJJiyaw/RqR90MuRdKPiBzSo=" { t.Errorf("signature is not correct: %v", sig) } } func TestSignVerifyECDSA(t *testing.T) { pub := `example.net. 3600 IN DNSKEY 257 3 14 ( xKYaNhWdGOfJ+nPrL8/arkwf2EY3MDJ+SErKivBVSum1 w/egsXvSADtNJhyem5RCOpgQ6K8X1DRSEkrbYQ+OB+v8 /uX45NBwY8rp65F6Glur8I/mlVNgF6W/qTI37m40 )` priv := `Private-key-format: v1.2 Algorithm: 14 (ECDSAP384SHA384) PrivateKey: WURgWHCcYIYUPWgeLmiPY2DJJk02vgrmTfitxgqcL4vwW7BOrbawVmVe0d9V94SR` eckey := testRR(pub) privkey, err := eckey.(*DNSKEY).NewPrivateKey(priv) if err != nil { t.Fatal(err) } // TODO: Create separate test for this ds := eckey.(*DNSKEY).ToDS(SHA384) if ds.KeyTag != 10771 { t.Fatal("wrong keytag on DS") } if ds.Digest != "72d7b62976ce06438e9c0bf319013cf801f09ecc84b8d7e9495f27e305c6a9b0563a9b5f4d288405c3008a946df983d6" { t.Fatal("wrong DS Digest") } a := testRR("www.example.net. 3600 IN A 192.0.2.1") sig := new(RRSIG) sig.Hdr = RR_Header{"example.net.", TypeRRSIG, ClassINET, 14400, 0} sig.Expiration, _ = StringToTime("20100909102025") sig.Inception, _ = StringToTime("20100812102025") sig.KeyTag = eckey.(*DNSKEY).KeyTag() sig.SignerName = eckey.(*DNSKEY).Hdr.Name sig.Algorithm = eckey.(*DNSKEY).Algorithm if sig.Sign(privkey.(*ecdsa.PrivateKey), []RR{a}) != nil { t.Fatal("failure to sign the record") } if err := sig.Verify(eckey.(*DNSKEY), []RR{a}); err != nil { t.Fatalf("failure to validate:\n%s\n%s\n%s\n\n%s\n\n%v", eckey.(*DNSKEY).String(), a.String(), sig.String(), eckey.(*DNSKEY).PrivateKeyString(privkey), err, ) } } func TestSignVerifyECDSA2(t *testing.T) { srv1 := testRR("srv.miek.nl. IN SRV 1000 800 0 web1.miek.nl.") srv := srv1.(*SRV) // With this key key := new(DNSKEY) key.Hdr.Rrtype = TypeDNSKEY key.Hdr.Name = "miek.nl." key.Hdr.Class = ClassINET key.Hdr.Ttl = 14400 key.Flags = 256 key.Protocol = 3 key.Algorithm = ECDSAP256SHA256 privkey, err := key.Generate(256) if err != nil { t.Fatal("failure to generate key") } // Fill in the values of the Sig, before signing sig := new(RRSIG) sig.Hdr = RR_Header{"miek.nl.", TypeRRSIG, ClassINET, 14400, 0} sig.TypeCovered = srv.Hdr.Rrtype sig.Labels = uint8(CountLabel(srv.Hdr.Name)) // works for all 3 sig.OrigTtl = srv.Hdr.Ttl sig.Expiration = 1296534305 // date -u '+%s' -d"2011-02-01 04:25:05" sig.Inception = 1293942305 // date -u '+%s' -d"2011-01-02 04:25:05" sig.KeyTag = key.KeyTag() // Get the keyfrom the Key sig.SignerName = key.Hdr.Name sig.Algorithm = ECDSAP256SHA256 if sig.Sign(privkey.(*ecdsa.PrivateKey), []RR{srv}) != nil { t.Fatal("failure to sign the record") } err = sig.Verify(key, []RR{srv}) if err != nil { t.Errorf("failure to validate:\n%s\n%s\n%s\n\n%s\n\n%v", key.String(), srv.String(), sig.String(), key.PrivateKeyString(privkey), err, ) } } func TestSignVerifyEd25519(t *testing.T) { srv1, err := NewRR("srv.miek.nl. IN SRV 1000 800 0 web1.miek.nl.") if err != nil { t.Fatal(err) } srv := srv1.(*SRV) // With this key key := new(DNSKEY) key.Hdr.Rrtype = TypeDNSKEY key.Hdr.Name = "miek.nl." key.Hdr.Class = ClassINET key.Hdr.Ttl = 14400 key.Flags = 256 key.Protocol = 3 key.Algorithm = ED25519 privkey, err := key.Generate(256) if err != nil { t.Fatal("failure to generate key") } // Fill in the values of the Sig, before signing sig := new(RRSIG) sig.Hdr = RR_Header{"miek.nl.", TypeRRSIG, ClassINET, 14400, 0} sig.TypeCovered = srv.Hdr.Rrtype sig.Labels = uint8(CountLabel(srv.Hdr.Name)) // works for all 3 sig.OrigTtl = srv.Hdr.Ttl sig.Expiration = 1296534305 // date -u '+%s' -d"2011-02-01 04:25:05" sig.Inception = 1293942305 // date -u '+%s' -d"2011-01-02 04:25:05" sig.KeyTag = key.KeyTag() // Get the keyfrom the Key sig.SignerName = key.Hdr.Name sig.Algorithm = ED25519 if sig.Sign(privkey.(ed25519.PrivateKey), []RR{srv}) != nil { t.Fatal("failure to sign the record") } err = sig.Verify(key, []RR{srv}) if err != nil { t.Logf("failure to validate:\n%s\n%s\n%s\n\n%s\n\n%v", key.String(), srv.String(), sig.String(), key.PrivateKeyString(privkey), err, ) } } // Here the test vectors from the relevant RFCs are checked. // rfc6605 6.1 func TestRFC6605P256(t *testing.T) { exDNSKEY := `example.net. 3600 IN DNSKEY 257 3 13 ( GojIhhXUN/u4v54ZQqGSnyhWJwaubCvTmeexv7bR6edb krSqQpF64cYbcB7wNcP+e+MAnLr+Wi9xMWyQLc8NAA== )` exPriv := `Private-key-format: v1.2 Algorithm: 13 (ECDSAP256SHA256) PrivateKey: GU6SnQ/Ou+xC5RumuIUIuJZteXT2z0O/ok1s38Et6mQ=` rrDNSKEY := testRR(exDNSKEY) priv, err := rrDNSKEY.(*DNSKEY).NewPrivateKey(exPriv) if err != nil { t.Fatal(err) } exDS := `example.net. 3600 IN DS 55648 13 2 ( b4c8c1fe2e7477127b27115656ad6256f424625bf5c1 e2770ce6d6e37df61d17 )` rrDS := testRR(exDS) ourDS := rrDNSKEY.(*DNSKEY).ToDS(SHA256) if !reflect.DeepEqual(ourDS, rrDS.(*DS)) { t.Errorf("DS record differs:\n%v\n%v", ourDS, rrDS.(*DS)) } exA := `www.example.net. 3600 IN A 192.0.2.1` exRRSIG := `www.example.net. 3600 IN RRSIG A 13 3 3600 ( 20100909100439 20100812100439 55648 example.net. qx6wLYqmh+l9oCKTN6qIc+bw6ya+KJ8oMz0YP107epXA yGmt+3SNruPFKG7tZoLBLlUzGGus7ZwmwWep666VCw== )` rrA := testRR(exA) rrRRSIG := testRR(exRRSIG) if err := rrRRSIG.(*RRSIG).Verify(rrDNSKEY.(*DNSKEY), []RR{rrA}); err != nil { t.Errorf("failure to validate the spec RRSIG: %v", err) } ourRRSIG := &RRSIG{ Hdr: RR_Header{ Ttl: rrA.Header().Ttl, }, KeyTag: rrDNSKEY.(*DNSKEY).KeyTag(), SignerName: rrDNSKEY.(*DNSKEY).Hdr.Name, Algorithm: rrDNSKEY.(*DNSKEY).Algorithm, } ourRRSIG.Expiration, _ = StringToTime("20100909100439") ourRRSIG.Inception, _ = StringToTime("20100812100439") err = ourRRSIG.Sign(priv.(*ecdsa.PrivateKey), []RR{rrA}) if err != nil { t.Fatal(err) } if err = ourRRSIG.Verify(rrDNSKEY.(*DNSKEY), []RR{rrA}); err != nil { t.Errorf("failure to validate our RRSIG: %v", err) } // Signatures are randomized rrRRSIG.(*RRSIG).Signature = "" ourRRSIG.Signature = "" if !reflect.DeepEqual(ourRRSIG, rrRRSIG.(*RRSIG)) { t.Fatalf("RRSIG record differs:\n%v\n%v", ourRRSIG, rrRRSIG.(*RRSIG)) } } // rfc6605 6.2 func TestRFC6605P384(t *testing.T) { exDNSKEY := `example.net. 3600 IN DNSKEY 257 3 14 ( xKYaNhWdGOfJ+nPrL8/arkwf2EY3MDJ+SErKivBVSum1 w/egsXvSADtNJhyem5RCOpgQ6K8X1DRSEkrbYQ+OB+v8 /uX45NBwY8rp65F6Glur8I/mlVNgF6W/qTI37m40 )` exPriv := `Private-key-format: v1.2 Algorithm: 14 (ECDSAP384SHA384) PrivateKey: WURgWHCcYIYUPWgeLmiPY2DJJk02vgrmTfitxgqcL4vwW7BOrbawVmVe0d9V94SR` rrDNSKEY := testRR(exDNSKEY) priv, err := rrDNSKEY.(*DNSKEY).NewPrivateKey(exPriv) if err != nil { t.Fatal(err) } exDS := `example.net. 3600 IN DS 10771 14 4 ( 72d7b62976ce06438e9c0bf319013cf801f09ecc84b8 d7e9495f27e305c6a9b0563a9b5f4d288405c3008a94 6df983d6 )` rrDS := testRR(exDS) ourDS := rrDNSKEY.(*DNSKEY).ToDS(SHA384) if !reflect.DeepEqual(ourDS, rrDS.(*DS)) { t.Fatalf("DS record differs:\n%v\n%v", ourDS, rrDS.(*DS)) } exA := `www.example.net. 3600 IN A 192.0.2.1` exRRSIG := `www.example.net. 3600 IN RRSIG A 14 3 3600 ( 20100909102025 20100812102025 10771 example.net. /L5hDKIvGDyI1fcARX3z65qrmPsVz73QD1Mr5CEqOiLP 95hxQouuroGCeZOvzFaxsT8Glr74hbavRKayJNuydCuz WTSSPdz7wnqXL5bdcJzusdnI0RSMROxxwGipWcJm )` rrA := testRR(exA) rrRRSIG := testRR(exRRSIG) if err != nil { t.Fatal(err) } if err = rrRRSIG.(*RRSIG).Verify(rrDNSKEY.(*DNSKEY), []RR{rrA}); err != nil { t.Errorf("failure to validate the spec RRSIG: %v", err) } ourRRSIG := &RRSIG{ Hdr: RR_Header{ Ttl: rrA.Header().Ttl, }, KeyTag: rrDNSKEY.(*DNSKEY).KeyTag(), SignerName: rrDNSKEY.(*DNSKEY).Hdr.Name, Algorithm: rrDNSKEY.(*DNSKEY).Algorithm, } ourRRSIG.Expiration, _ = StringToTime("20100909102025") ourRRSIG.Inception, _ = StringToTime("20100812102025") err = ourRRSIG.Sign(priv.(*ecdsa.PrivateKey), []RR{rrA}) if err != nil { t.Fatal(err) } if err = ourRRSIG.Verify(rrDNSKEY.(*DNSKEY), []RR{rrA}); err != nil { t.Errorf("failure to validate our RRSIG: %v", err) } // Signatures are randomized rrRRSIG.(*RRSIG).Signature = "" ourRRSIG.Signature = "" if !reflect.DeepEqual(ourRRSIG, rrRRSIG.(*RRSIG)) { t.Fatalf("RRSIG record differs:\n%v\n%v", ourRRSIG, rrRRSIG.(*RRSIG)) } } // rfc8080 6.1 func TestRFC8080Ed25519Example1(t *testing.T) { exDNSKEY := `example.com. 3600 IN DNSKEY 257 3 15 ( l02Woi0iS8Aa25FQkUd9RMzZHJpBoRQwAQEX1SxZJA4= )` exPriv := `Private-key-format: v1.2 Algorithm: 15 (ED25519) PrivateKey: ODIyNjAzODQ2MjgwODAxMjI2NDUxOTAyMDQxNDIyNjI=` rrDNSKEY, err := NewRR(exDNSKEY) if err != nil { t.Fatal(err) } priv, err := rrDNSKEY.(*DNSKEY).NewPrivateKey(exPriv) if err != nil { t.Fatal(err) } exDS := `example.com. 3600 IN DS 3613 15 2 ( 3aa5ab37efce57f737fc1627013fee07bdf241bd10f3b1964ab55c78e79 a304b )` rrDS, err := NewRR(exDS) if err != nil { t.Fatal(err) } ourDS := rrDNSKEY.(*DNSKEY).ToDS(SHA256) if !reflect.DeepEqual(ourDS, rrDS.(*DS)) { t.Fatalf("DS record differs:\n%v\n%v", ourDS, rrDS.(*DS)) } exMX := `example.com. 3600 IN MX 10 mail.example.com.` exRRSIG := `example.com. 3600 IN RRSIG MX 15 2 3600 ( 1440021600 1438207200 3613 example.com. ( oL9krJun7xfBOIWcGHi7mag5/hdZrKWw15jPGrHpjQeRAvTdszaPD+QLs3f x8A4M3e23mRZ9VrbpMngwcrqNAg== ) )` rrMX, err := NewRR(exMX) if err != nil { t.Fatal(err) } rrRRSIG, err := NewRR(exRRSIG) if err != nil { t.Fatal(err) } if err = rrRRSIG.(*RRSIG).Verify(rrDNSKEY.(*DNSKEY), []RR{rrMX}); err != nil { t.Errorf("failure to validate the spec RRSIG: %v", err) } ourRRSIG := &RRSIG{ Hdr: RR_Header{ Ttl: rrMX.Header().Ttl, }, KeyTag: rrDNSKEY.(*DNSKEY).KeyTag(), SignerName: rrDNSKEY.(*DNSKEY).Hdr.Name, Algorithm: rrDNSKEY.(*DNSKEY).Algorithm, } ourRRSIG.Expiration, _ = StringToTime("20150819220000") ourRRSIG.Inception, _ = StringToTime("20150729220000") err = ourRRSIG.Sign(priv.(ed25519.PrivateKey), []RR{rrMX}) if err != nil { t.Fatal(err) } if err = ourRRSIG.Verify(rrDNSKEY.(*DNSKEY), []RR{rrMX}); err != nil { t.Errorf("failure to validate our RRSIG: %v", err) } if !reflect.DeepEqual(ourRRSIG, rrRRSIG.(*RRSIG)) { t.Fatalf("RRSIG record differs:\n%v\n%v", ourRRSIG, rrRRSIG.(*RRSIG)) } } // rfc8080 6.1 func TestRFC8080Ed25519Example2(t *testing.T) { exDNSKEY := `example.com. 3600 IN DNSKEY 257 3 15 ( zPnZ/QwEe7S8C5SPz2OfS5RR40ATk2/rYnE9xHIEijs= )` exPriv := `Private-key-format: v1.2 Algorithm: 15 (ED25519) PrivateKey: DSSF3o0s0f+ElWzj9E/Osxw8hLpk55chkmx0LYN5WiY=` rrDNSKEY, err := NewRR(exDNSKEY) if err != nil { t.Fatal(err) } priv, err := rrDNSKEY.(*DNSKEY).NewPrivateKey(exPriv) if err != nil { t.Fatal(err) } exDS := `example.com. 3600 IN DS 35217 15 2 ( 401781b934e392de492ec77ae2e15d70f6575a1c0bc59c5275c04ebe80c 6614c )` rrDS, err := NewRR(exDS) if err != nil { t.Fatal(err) } ourDS := rrDNSKEY.(*DNSKEY).ToDS(SHA256) if !reflect.DeepEqual(ourDS, rrDS.(*DS)) { t.Fatalf("DS record differs:\n%v\n%v", ourDS, rrDS.(*DS)) } exMX := `example.com. 3600 IN MX 10 mail.example.com.` exRRSIG := `example.com. 3600 IN RRSIG MX 15 2 3600 ( 1440021600 1438207200 35217 example.com. ( zXQ0bkYgQTEFyfLyi9QoiY6D8ZdYo4wyUhVioYZXFdT410QPRITQSqJSnzQ oSm5poJ7gD7AQR0O7KuI5k2pcBg== ) )` rrMX, err := NewRR(exMX) if err != nil { t.Fatal(err) } rrRRSIG, err := NewRR(exRRSIG) if err != nil { t.Fatal(err) } if err = rrRRSIG.(*RRSIG).Verify(rrDNSKEY.(*DNSKEY), []RR{rrMX}); err != nil { t.Errorf("failure to validate the spec RRSIG: %v", err) } ourRRSIG := &RRSIG{ Hdr: RR_Header{ Ttl: rrMX.Header().Ttl, }, KeyTag: rrDNSKEY.(*DNSKEY).KeyTag(), SignerName: rrDNSKEY.(*DNSKEY).Hdr.Name, Algorithm: rrDNSKEY.(*DNSKEY).Algorithm, } ourRRSIG.Expiration, _ = StringToTime("20150819220000") ourRRSIG.Inception, _ = StringToTime("20150729220000") err = ourRRSIG.Sign(priv.(ed25519.PrivateKey), []RR{rrMX}) if err != nil { t.Fatal(err) } if err = ourRRSIG.Verify(rrDNSKEY.(*DNSKEY), []RR{rrMX}); err != nil { t.Errorf("failure to validate our RRSIG: %v", err) } if !reflect.DeepEqual(ourRRSIG, rrRRSIG.(*RRSIG)) { t.Fatalf("RRSIG record differs:\n%v\n%v", ourRRSIG, rrRRSIG.(*RRSIG)) } } func TestInvalidRRSet(t *testing.T) { goodRecords := make([]RR, 2) goodRecords[0] = &TXT{Hdr: RR_Header{Name: "name.cloudflare.com.", Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}, Txt: []string{"Hello world"}} goodRecords[1] = &TXT{Hdr: RR_Header{Name: "name.cloudflare.com.", Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}, Txt: []string{"_o/"}} // Generate key keyname := "cloudflare.com." key := &DNSKEY{ Hdr: RR_Header{Name: keyname, Rrtype: TypeDNSKEY, Class: ClassINET, Ttl: 0}, Algorithm: ECDSAP256SHA256, Flags: ZONE, Protocol: 3, } privatekey, err := key.Generate(256) if err != nil { t.Fatal(err.Error()) } // Need to fill in: Inception, Expiration, KeyTag, SignerName and Algorithm curTime := time.Now() signature := &RRSIG{ Inception: uint32(curTime.Unix()), Expiration: uint32(curTime.Add(time.Hour).Unix()), KeyTag: key.KeyTag(), SignerName: keyname, Algorithm: ECDSAP256SHA256, } // Inconsistent name between records badRecords := make([]RR, 2) badRecords[0] = &TXT{Hdr: RR_Header{Name: "name.cloudflare.com.", Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}, Txt: []string{"Hello world"}} badRecords[1] = &TXT{Hdr: RR_Header{Name: "nama.cloudflare.com.", Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}, Txt: []string{"_o/"}} if IsRRset(badRecords) { t.Fatal("Record set with inconsistent names considered valid") } badRecords[0] = &TXT{Hdr: RR_Header{Name: "name.cloudflare.com.", Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}, Txt: []string{"Hello world"}} badRecords[1] = &A{Hdr: RR_Header{Name: "name.cloudflare.com.", Rrtype: TypeA, Class: ClassINET, Ttl: 0}} if IsRRset(badRecords) { t.Fatal("Record set with inconsistent record types considered valid") } badRecords[0] = &TXT{Hdr: RR_Header{Name: "name.cloudflare.com.", Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}, Txt: []string{"Hello world"}} badRecords[1] = &TXT{Hdr: RR_Header{Name: "name.cloudflare.com.", Rrtype: TypeTXT, Class: ClassCHAOS, Ttl: 0}, Txt: []string{"_o/"}} if IsRRset(badRecords) { t.Fatal("Record set with inconsistent record class considered valid") } // Sign the good record set and then make sure verification fails on the bad record set if err := signature.Sign(privatekey.(crypto.Signer), goodRecords); err != nil { t.Fatal("Signing good records failed") } if err := signature.Verify(key, badRecords); err != ErrRRset { t.Fatal("Verification did not return ErrRRset with inconsistent records") } } golang-github-miekg-dns-1.0.4+ds/dnsutil/000077500000000000000000000000001325625637500202215ustar00rootroot00000000000000golang-github-miekg-dns-1.0.4+ds/dnsutil/util.go000066400000000000000000000047371325625637500215400ustar00rootroot00000000000000// Package dnsutil contains higher-level methods useful with the dns // package. While package dns implements the DNS protocols itself, // these functions are related but not directly required for protocol // processing. They are often useful in preparing input/output of the // functions in package dns. package dnsutil import ( "strings" "github.com/miekg/dns" ) // AddOrigin adds origin to s if s is not already a FQDN. // Note that the result may not be a FQDN. If origin does not end // with a ".", the result won't either. // This implements the zonefile convention (specified in RFC 1035, // Section "5.1. Format") that "@" represents the // apex (bare) domain. i.e. AddOrigin("@", "foo.com.") returns "foo.com.". func AddOrigin(s, origin string) string { // ("foo.", "origin.") -> "foo." (already a FQDN) // ("foo", "origin.") -> "foo.origin." // ("foo", "origin") -> "foo.origin" // ("foo", ".") -> "foo." (Same as dns.Fqdn()) // ("foo.", ".") -> "foo." (Same as dns.Fqdn()) // ("@", "origin.") -> "origin." (@ represents the apex (bare) domain) // ("", "origin.") -> "origin." (not obvious) // ("foo", "") -> "foo" (not obvious) if dns.IsFqdn(s) { return s // s is already a FQDN, no need to mess with it. } if len(origin) == 0 { return s // Nothing to append. } if s == "@" || len(s) == 0 { return origin // Expand apex. } if origin == "." { return dns.Fqdn(s) } return s + "." + origin // The simple case. } // TrimDomainName trims origin from s if s is a subdomain. // This function will never return "", but returns "@" instead (@ represents the apex domain). func TrimDomainName(s, origin string) string { // An apex (bare) domain is always returned as "@". // If the return value ends in a ".", the domain was not the suffix. // origin can end in "." or not. Either way the results should be the same. if len(s) == 0 { return "@" } // Someone is using TrimDomainName(s, ".") to remove a dot if it exists. if origin == "." { return strings.TrimSuffix(s, origin) } original := s s = dns.Fqdn(s) origin = dns.Fqdn(origin) if !dns.IsSubDomain(origin, s) { return original } slabels := dns.Split(s) olabels := dns.Split(origin) m := dns.CompareDomainName(s, origin) if len(olabels) == m { if len(olabels) == len(slabels) { return "@" // origin == s } if (s[0] == '.') && (len(slabels) == (len(olabels) + 1)) { return "@" // TrimDomainName(".foo.", "foo.") } } // Return the first (len-m) labels: return s[:slabels[len(slabels)-m]-1] } golang-github-miekg-dns-1.0.4+ds/dnsutil/util_test.go000066400000000000000000000076231325625637500225740ustar00rootroot00000000000000package dnsutil import "testing" func TestAddOrigin(t *testing.T) { var tests = []struct{ e1, e2, expected string }{ {"@", "example.com", "example.com"}, {"foo", "example.com", "foo.example.com"}, {"foo.", "example.com", "foo."}, {"@", "example.com.", "example.com."}, {"foo", "example.com.", "foo.example.com."}, {"foo.", "example.com.", "foo."}, {"example.com", ".", "example.com."}, {"example.com.", ".", "example.com."}, // Oddball tests: // In general origin should not be "" or "." but at least // these tests verify we don't crash and will keep results // from changing unexpectedly. {"*.", "", "*."}, {"@", "", "@"}, {"foobar", "", "foobar"}, {"foobar.", "", "foobar."}, {"*.", ".", "*."}, {"@", ".", "."}, {"foobar", ".", "foobar."}, {"foobar.", ".", "foobar."}, } for _, test := range tests { actual := AddOrigin(test.e1, test.e2) if test.expected != actual { t.Errorf("AddOrigin(%#v, %#v) expected %#v, got %#v\n", test.e1, test.e2, test.expected, actual) } } } func TestTrimDomainName(t *testing.T) { // Basic tests. // Try trimming "example.com" and "example.com." from typical use cases. testsEx := []struct{ experiment, expected string }{ {"foo.example.com", "foo"}, {"foo.example.com.", "foo"}, {".foo.example.com", ".foo"}, {".foo.example.com.", ".foo"}, {"*.example.com", "*"}, {"example.com", "@"}, {"example.com.", "@"}, {"com.", "com."}, {"foo.", "foo."}, {"serverfault.com.", "serverfault.com."}, {"serverfault.com", "serverfault.com"}, {".foo.ronco.com", ".foo.ronco.com"}, {".foo.ronco.com.", ".foo.ronco.com."}, } for _, dom := range []string{"example.com", "example.com."} { for i, test := range testsEx { actual := TrimDomainName(test.experiment, dom) if test.expected != actual { t.Errorf("%d TrimDomainName(%#v, %#v): expected %v, got %v\n", i, test.experiment, dom, test.expected, actual) } } } // Paranoid tests. // These test shouldn't be needed but I was weary of off-by-one errors. // In theory, these can't happen because there are no single-letter TLDs, // but it is good to exercize the code this way. tests := []struct{ experiment, expected string }{ {"", "@"}, {".", "."}, {"a.b.c.d.e.f.", "a.b.c.d.e"}, {"b.c.d.e.f.", "b.c.d.e"}, {"c.d.e.f.", "c.d.e"}, {"d.e.f.", "d.e"}, {"e.f.", "e"}, {"f.", "@"}, {".a.b.c.d.e.f.", ".a.b.c.d.e"}, {".b.c.d.e.f.", ".b.c.d.e"}, {".c.d.e.f.", ".c.d.e"}, {".d.e.f.", ".d.e"}, {".e.f.", ".e"}, {".f.", "@"}, {"a.b.c.d.e.f", "a.b.c.d.e"}, {"a.b.c.d.e.", "a.b.c.d.e."}, {"a.b.c.d.e", "a.b.c.d.e"}, {"a.b.c.d.", "a.b.c.d."}, {"a.b.c.d", "a.b.c.d"}, {"a.b.c.", "a.b.c."}, {"a.b.c", "a.b.c"}, {"a.b.", "a.b."}, {"a.b", "a.b"}, {"a.", "a."}, {"a", "a"}, {".a.b.c.d.e.f", ".a.b.c.d.e"}, {".a.b.c.d.e.", ".a.b.c.d.e."}, {".a.b.c.d.e", ".a.b.c.d.e"}, {".a.b.c.d.", ".a.b.c.d."}, {".a.b.c.d", ".a.b.c.d"}, {".a.b.c.", ".a.b.c."}, {".a.b.c", ".a.b.c"}, {".a.b.", ".a.b."}, {".a.b", ".a.b"}, {".a.", ".a."}, {".a", ".a"}, } for _, dom := range []string{"f", "f."} { for i, test := range tests { actual := TrimDomainName(test.experiment, dom) if test.expected != actual { t.Errorf("%d TrimDomainName(%#v, %#v): expected %v, got %v\n", i, test.experiment, dom, test.expected, actual) } } } // Test cases for bugs found in the wild. // These test cases provide both origin, s, and the expected result. // If you find a bug in the while, this is probably the easiest place // to add it as a test case. var testsWild = []struct{ e1, e2, expected string }{ {"mathoverflow.net.", ".", "mathoverflow.net"}, {"mathoverflow.net", ".", "mathoverflow.net"}, {"", ".", "@"}, {"@", ".", "@"}, } for i, test := range testsWild { actual := TrimDomainName(test.e1, test.e2) if test.expected != actual { t.Errorf("%d TrimDomainName(%#v, %#v): expected %v, got %v\n", i, test.e1, test.e2, test.expected, actual) } } } golang-github-miekg-dns-1.0.4+ds/doc.go000066400000000000000000000234231325625637500176370ustar00rootroot00000000000000/* Package dns implements a full featured interface to the Domain Name System. Server- and client-side programming is supported. The package allows complete control over what is sent out to the DNS. The package API follows the less-is-more principle, by presenting a small, clean interface. The package dns supports (asynchronous) querying/replying, incoming/outgoing zone transfers, TSIG, EDNS0, dynamic updates, notifies and DNSSEC validation/signing. Note that domain names MUST be fully qualified, before sending them, unqualified names in a message will result in a packing failure. Resource records are native types. They are not stored in wire format. Basic usage pattern for creating a new resource record: r := new(dns.MX) r.Hdr = dns.RR_Header{Name: "miek.nl.", Rrtype: dns.TypeMX, Class: dns.ClassINET, Ttl: 3600} r.Preference = 10 r.Mx = "mx.miek.nl." Or directly from a string: mx, err := dns.NewRR("miek.nl. 3600 IN MX 10 mx.miek.nl.") Or when the default origin (.) and TTL (3600) and class (IN) suit you: mx, err := dns.NewRR("miek.nl MX 10 mx.miek.nl") Or even: mx, err := dns.NewRR("$ORIGIN nl.\nmiek 1H IN MX 10 mx.miek") In the DNS messages are exchanged, these messages contain resource records (sets). Use pattern for creating a message: m := new(dns.Msg) m.SetQuestion("miek.nl.", dns.TypeMX) Or when not certain if the domain name is fully qualified: m.SetQuestion(dns.Fqdn("miek.nl"), dns.TypeMX) The message m is now a message with the question section set to ask the MX records for the miek.nl. zone. The following is slightly more verbose, but more flexible: m1 := new(dns.Msg) m1.Id = dns.Id() m1.RecursionDesired = true m1.Question = make([]dns.Question, 1) m1.Question[0] = dns.Question{"miek.nl.", dns.TypeMX, dns.ClassINET} After creating a message it can be sent. Basic use pattern for synchronous querying the DNS at a server configured on 127.0.0.1 and port 53: c := new(dns.Client) in, rtt, err := c.Exchange(m1, "127.0.0.1:53") Suppressing multiple outstanding queries (with the same question, type and class) is as easy as setting: c.SingleInflight = true More advanced options are available using a net.Dialer and the corresponding API. For example it is possible to set a timeout, or to specify a source IP address and port to use for the connection: c := new(dns.Client) laddr := net.UDPAddr{ IP: net.ParseIP("[::1]"), Port: 12345, Zone: "", } d := net.Dialer{ Timeout: 200 * time.Millisecond, LocalAddr: &laddr, } in, rtt, err := c.ExchangeWithDialer(&d, m1, "8.8.8.8:53") If these "advanced" features are not needed, a simple UDP query can be sent, with: in, err := dns.Exchange(m1, "127.0.0.1:53") When this functions returns you will get dns message. A dns message consists out of four sections. The question section: in.Question, the answer section: in.Answer, the authority section: in.Ns and the additional section: in.Extra. Each of these sections (except the Question section) contain a []RR. Basic use pattern for accessing the rdata of a TXT RR as the first RR in the Answer section: if t, ok := in.Answer[0].(*dns.TXT); ok { // do something with t.Txt } Domain Name and TXT Character String Representations Both domain names and TXT character strings are converted to presentation form both when unpacked and when converted to strings. For TXT character strings, tabs, carriage returns and line feeds will be converted to \t, \r and \n respectively. Back slashes and quotations marks will be escaped. Bytes below 32 and above 127 will be converted to \DDD form. For domain names, in addition to the above rules brackets, periods, spaces, semicolons and the at symbol are escaped. DNSSEC DNSSEC (DNS Security Extension) adds a layer of security to the DNS. It uses public key cryptography to sign resource records. The public keys are stored in DNSKEY records and the signatures in RRSIG records. Requesting DNSSEC information for a zone is done by adding the DO (DNSSEC OK) bit to a request. m := new(dns.Msg) m.SetEdns0(4096, true) Signature generation, signature verification and key generation are all supported. DYNAMIC UPDATES Dynamic updates reuses the DNS message format, but renames three of the sections. Question is Zone, Answer is Prerequisite, Authority is Update, only the Additional is not renamed. See RFC 2136 for the gory details. You can set a rather complex set of rules for the existence of absence of certain resource records or names in a zone to specify if resource records should be added or removed. The table from RFC 2136 supplemented with the Go DNS function shows which functions exist to specify the prerequisites. 3.2.4 - Table Of Metavalues Used In Prerequisite Section CLASS TYPE RDATA Meaning Function -------------------------------------------------------------- ANY ANY empty Name is in use dns.NameUsed ANY rrset empty RRset exists (value indep) dns.RRsetUsed NONE ANY empty Name is not in use dns.NameNotUsed NONE rrset empty RRset does not exist dns.RRsetNotUsed zone rrset rr RRset exists (value dep) dns.Used The prerequisite section can also be left empty. If you have decided on the prerequisites you can tell what RRs should be added or deleted. The next table shows the options you have and what functions to call. 3.4.2.6 - Table Of Metavalues Used In Update Section CLASS TYPE RDATA Meaning Function --------------------------------------------------------------- ANY ANY empty Delete all RRsets from name dns.RemoveName ANY rrset empty Delete an RRset dns.RemoveRRset NONE rrset rr Delete an RR from RRset dns.Remove zone rrset rr Add to an RRset dns.Insert TRANSACTION SIGNATURE An TSIG or transaction signature adds a HMAC TSIG record to each message sent. The supported algorithms include: HmacMD5, HmacSHA1, HmacSHA256 and HmacSHA512. Basic use pattern when querying with a TSIG name "axfr." (note that these key names must be fully qualified - as they are domain names) and the base64 secret "so6ZGir4GPAqINNh9U5c3A==": If an incoming message contains a TSIG record it MUST be the last record in the additional section (RFC2845 3.2). This means that you should make the call to SetTsig last, right before executing the query. If you make any changes to the RRset after calling SetTsig() the signature will be incorrect. c := new(dns.Client) c.TsigSecret = map[string]string{"axfr.": "so6ZGir4GPAqINNh9U5c3A=="} m := new(dns.Msg) m.SetQuestion("miek.nl.", dns.TypeMX) m.SetTsig("axfr.", dns.HmacMD5, 300, time.Now().Unix()) ... // When sending the TSIG RR is calculated and filled in before sending When requesting an zone transfer (almost all TSIG usage is when requesting zone transfers), with TSIG, this is the basic use pattern. In this example we request an AXFR for miek.nl. with TSIG key named "axfr." and secret "so6ZGir4GPAqINNh9U5c3A==" and using the server 176.58.119.54: t := new(dns.Transfer) m := new(dns.Msg) t.TsigSecret = map[string]string{"axfr.": "so6ZGir4GPAqINNh9U5c3A=="} m.SetAxfr("miek.nl.") m.SetTsig("axfr.", dns.HmacMD5, 300, time.Now().Unix()) c, err := t.In(m, "176.58.119.54:53") for r := range c { ... } You can now read the records from the transfer as they come in. Each envelope is checked with TSIG. If something is not correct an error is returned. Basic use pattern validating and replying to a message that has TSIG set. server := &dns.Server{Addr: ":53", Net: "udp"} server.TsigSecret = map[string]string{"axfr.": "so6ZGir4GPAqINNh9U5c3A=="} go server.ListenAndServe() dns.HandleFunc(".", handleRequest) func handleRequest(w dns.ResponseWriter, r *dns.Msg) { m := new(dns.Msg) m.SetReply(r) if r.IsTsig() != nil { if w.TsigStatus() == nil { // *Msg r has an TSIG record and it was validated m.SetTsig("axfr.", dns.HmacMD5, 300, time.Now().Unix()) } else { // *Msg r has an TSIG records and it was not valided } } w.WriteMsg(m) } PRIVATE RRS RFC 6895 sets aside a range of type codes for private use. This range is 65,280 - 65,534 (0xFF00 - 0xFFFE). When experimenting with new Resource Records these can be used, before requesting an official type code from IANA. see http://miek.nl/2014/September/21/idn-and-private-rr-in-go-dns/ for more information. EDNS0 EDNS0 is an extension mechanism for the DNS defined in RFC 2671 and updated by RFC 6891. It defines an new RR type, the OPT RR, which is then completely abused. Basic use pattern for creating an (empty) OPT RR: o := new(dns.OPT) o.Hdr.Name = "." // MUST be the root zone, per definition. o.Hdr.Rrtype = dns.TypeOPT The rdata of an OPT RR consists out of a slice of EDNS0 (RFC 6891) interfaces. Currently only a few have been standardized: EDNS0_NSID (RFC 5001) and EDNS0_SUBNET (draft-vandergaast-edns-client-subnet-02). Note that these options may be combined in an OPT RR. Basic use pattern for a server to check if (and which) options are set: // o is a dns.OPT for _, s := range o.Option { switch e := s.(type) { case *dns.EDNS0_NSID: // do stuff with e.Nsid case *dns.EDNS0_SUBNET: // access e.Family, e.Address, etc. } } SIG(0) From RFC 2931: SIG(0) provides protection for DNS transactions and requests .... ... protection for glue records, DNS requests, protection for message headers on requests and responses, and protection of the overall integrity of a response. It works like TSIG, except that SIG(0) uses public key cryptography, instead of the shared secret approach in TSIG. Supported algorithms: DSA, ECDSAP256SHA256, ECDSAP384SHA384, RSASHA1, RSASHA256 and RSASHA512. Signing subsequent messages in multi-message sessions is not implemented. */ package dns golang-github-miekg-dns-1.0.4+ds/dyn_test.go000066400000000000000000000000451325625637500207160ustar00rootroot00000000000000package dns // Find better solution golang-github-miekg-dns-1.0.4+ds/edns.go000066400000000000000000000445271325625637500200330ustar00rootroot00000000000000package dns import ( "encoding/binary" "encoding/hex" "errors" "fmt" "net" "strconv" ) // EDNS0 Option codes. const ( EDNS0LLQ = 0x1 // long lived queries: http://tools.ietf.org/html/draft-sekar-dns-llq-01 EDNS0UL = 0x2 // update lease draft: http://files.dns-sd.org/draft-sekar-dns-ul.txt EDNS0NSID = 0x3 // nsid (See RFC 5001) EDNS0DAU = 0x5 // DNSSEC Algorithm Understood EDNS0DHU = 0x6 // DS Hash Understood EDNS0N3U = 0x7 // NSEC3 Hash Understood EDNS0SUBNET = 0x8 // client-subnet (See RFC 7871) EDNS0EXPIRE = 0x9 // EDNS0 expire EDNS0COOKIE = 0xa // EDNS0 Cookie EDNS0TCPKEEPALIVE = 0xb // EDNS0 tcp keep alive (See RFC 7828) EDNS0PADDING = 0xc // EDNS0 padding (See RFC 7830) EDNS0LOCALSTART = 0xFDE9 // Beginning of range reserved for local/experimental use (See RFC 6891) EDNS0LOCALEND = 0xFFFE // End of range reserved for local/experimental use (See RFC 6891) _DO = 1 << 15 // DNSSEC OK ) // OPT is the EDNS0 RR appended to messages to convey extra (meta) information. // See RFC 6891. type OPT struct { Hdr RR_Header Option []EDNS0 `dns:"opt"` } func (rr *OPT) String() string { s := "\n;; OPT PSEUDOSECTION:\n; EDNS: version " + strconv.Itoa(int(rr.Version())) + "; " if rr.Do() { s += "flags: do; " } else { s += "flags: ; " } s += "udp: " + strconv.Itoa(int(rr.UDPSize())) for _, o := range rr.Option { switch o.(type) { case *EDNS0_NSID: s += "\n; NSID: " + o.String() h, e := o.pack() var r string if e == nil { for _, c := range h { r += "(" + string(c) + ")" } s += " " + r } case *EDNS0_SUBNET: s += "\n; SUBNET: " + o.String() case *EDNS0_COOKIE: s += "\n; COOKIE: " + o.String() case *EDNS0_UL: s += "\n; UPDATE LEASE: " + o.String() case *EDNS0_LLQ: s += "\n; LONG LIVED QUERIES: " + o.String() case *EDNS0_DAU: s += "\n; DNSSEC ALGORITHM UNDERSTOOD: " + o.String() case *EDNS0_DHU: s += "\n; DS HASH UNDERSTOOD: " + o.String() case *EDNS0_N3U: s += "\n; NSEC3 HASH UNDERSTOOD: " + o.String() case *EDNS0_LOCAL: s += "\n; LOCAL OPT: " + o.String() case *EDNS0_PADDING: s += "\n; PADDING: " + o.String() } } return s } func (rr *OPT) len() int { l := rr.Hdr.len() for i := 0; i < len(rr.Option); i++ { l += 4 // Account for 2-byte option code and 2-byte option length. lo, _ := rr.Option[i].pack() l += len(lo) } return l } // return the old value -> delete SetVersion? // Version returns the EDNS version used. Only zero is defined. func (rr *OPT) Version() uint8 { return uint8((rr.Hdr.Ttl & 0x00FF0000) >> 16) } // SetVersion sets the version of EDNS. This is usually zero. func (rr *OPT) SetVersion(v uint8) { rr.Hdr.Ttl = rr.Hdr.Ttl&0xFF00FFFF | (uint32(v) << 16) } // ExtendedRcode returns the EDNS extended RCODE field (the upper 8 bits of the TTL). func (rr *OPT) ExtendedRcode() int { return int((rr.Hdr.Ttl & 0xFF000000) >> 24) } // SetExtendedRcode sets the EDNS extended RCODE field. func (rr *OPT) SetExtendedRcode(v uint8) { rr.Hdr.Ttl = rr.Hdr.Ttl&0x00FFFFFF | (uint32(v) << 24) } // UDPSize returns the UDP buffer size. func (rr *OPT) UDPSize() uint16 { return rr.Hdr.Class } // SetUDPSize sets the UDP buffer size. func (rr *OPT) SetUDPSize(size uint16) { rr.Hdr.Class = size } // Do returns the value of the DO (DNSSEC OK) bit. func (rr *OPT) Do() bool { return rr.Hdr.Ttl&_DO == _DO } // SetDo sets the DO (DNSSEC OK) bit. // If we pass an argument, set the DO bit to that value. // It is possible to pass 2 or more arguments. Any arguments after the 1st is silently ignored. func (rr *OPT) SetDo(do ...bool) { if len(do) == 1 { if do[0] { rr.Hdr.Ttl |= _DO } else { rr.Hdr.Ttl &^= _DO } } else { rr.Hdr.Ttl |= _DO } } // EDNS0 defines an EDNS0 Option. An OPT RR can have multiple options appended to it. type EDNS0 interface { // Option returns the option code for the option. Option() uint16 // pack returns the bytes of the option data. pack() ([]byte, error) // unpack sets the data as found in the buffer. Is also sets // the length of the slice as the length of the option data. unpack([]byte) error // String returns the string representation of the option. String() string } // EDNS0_NSID option is used to retrieve a nameserver // identifier. When sending a request Nsid must be set to the empty string // The identifier is an opaque string encoded as hex. // Basic use pattern for creating an nsid option: // // o := new(dns.OPT) // o.Hdr.Name = "." // o.Hdr.Rrtype = dns.TypeOPT // e := new(dns.EDNS0_NSID) // e.Code = dns.EDNS0NSID // e.Nsid = "AA" // o.Option = append(o.Option, e) type EDNS0_NSID struct { Code uint16 // Always EDNS0NSID Nsid string // This string needs to be hex encoded } func (e *EDNS0_NSID) pack() ([]byte, error) { h, err := hex.DecodeString(e.Nsid) if err != nil { return nil, err } return h, nil } // Option implements the EDNS0 interface. func (e *EDNS0_NSID) Option() uint16 { return EDNS0NSID } // Option returns the option code. func (e *EDNS0_NSID) unpack(b []byte) error { e.Nsid = hex.EncodeToString(b); return nil } func (e *EDNS0_NSID) String() string { return string(e.Nsid) } // EDNS0_SUBNET is the subnet option that is used to give the remote nameserver // an idea of where the client lives. See RFC 7871. It can then give back a different // answer depending on the location or network topology. // Basic use pattern for creating an subnet option: // // o := new(dns.OPT) // o.Hdr.Name = "." // o.Hdr.Rrtype = dns.TypeOPT // e := new(dns.EDNS0_SUBNET) // e.Code = dns.EDNS0SUBNET // e.Family = 1 // 1 for IPv4 source address, 2 for IPv6 // e.SourceNetmask = 32 // 32 for IPV4, 128 for IPv6 // e.SourceScope = 0 // e.Address = net.ParseIP("127.0.0.1").To4() // for IPv4 // // e.Address = net.ParseIP("2001:7b8:32a::2") // for IPV6 // o.Option = append(o.Option, e) // // This code will parse all the available bits when unpacking (up to optlen). // When packing it will apply SourceNetmask. If you need more advanced logic, // patches welcome and good luck. type EDNS0_SUBNET struct { Code uint16 // Always EDNS0SUBNET Family uint16 // 1 for IP, 2 for IP6 SourceNetmask uint8 SourceScope uint8 Address net.IP } // Option implements the EDNS0 interface. func (e *EDNS0_SUBNET) Option() uint16 { return EDNS0SUBNET } func (e *EDNS0_SUBNET) pack() ([]byte, error) { b := make([]byte, 4) binary.BigEndian.PutUint16(b[0:], e.Family) b[2] = e.SourceNetmask b[3] = e.SourceScope switch e.Family { case 0: // "dig" sets AddressFamily to 0 if SourceNetmask is also 0 // We might don't need to complain either if e.SourceNetmask != 0 { return nil, errors.New("dns: bad address family") } case 1: if e.SourceNetmask > net.IPv4len*8 { return nil, errors.New("dns: bad netmask") } if len(e.Address.To4()) != net.IPv4len { return nil, errors.New("dns: bad address") } ip := e.Address.To4().Mask(net.CIDRMask(int(e.SourceNetmask), net.IPv4len*8)) needLength := (e.SourceNetmask + 8 - 1) / 8 // division rounding up b = append(b, ip[:needLength]...) case 2: if e.SourceNetmask > net.IPv6len*8 { return nil, errors.New("dns: bad netmask") } if len(e.Address) != net.IPv6len { return nil, errors.New("dns: bad address") } ip := e.Address.Mask(net.CIDRMask(int(e.SourceNetmask), net.IPv6len*8)) needLength := (e.SourceNetmask + 8 - 1) / 8 // division rounding up b = append(b, ip[:needLength]...) default: return nil, errors.New("dns: bad address family") } return b, nil } func (e *EDNS0_SUBNET) unpack(b []byte) error { if len(b) < 4 { return ErrBuf } e.Family = binary.BigEndian.Uint16(b) e.SourceNetmask = b[2] e.SourceScope = b[3] switch e.Family { case 0: // "dig" sets AddressFamily to 0 if SourceNetmask is also 0 // It's okay to accept such a packet if e.SourceNetmask != 0 { return errors.New("dns: bad address family") } e.Address = net.IPv4(0, 0, 0, 0) case 1: if e.SourceNetmask > net.IPv4len*8 || e.SourceScope > net.IPv4len*8 { return errors.New("dns: bad netmask") } addr := make([]byte, net.IPv4len) for i := 0; i < net.IPv4len && 4+i < len(b); i++ { addr[i] = b[4+i] } e.Address = net.IPv4(addr[0], addr[1], addr[2], addr[3]) case 2: if e.SourceNetmask > net.IPv6len*8 || e.SourceScope > net.IPv6len*8 { return errors.New("dns: bad netmask") } addr := make([]byte, net.IPv6len) for i := 0; i < net.IPv6len && 4+i < len(b); i++ { addr[i] = b[4+i] } e.Address = net.IP{addr[0], addr[1], addr[2], addr[3], addr[4], addr[5], addr[6], addr[7], addr[8], addr[9], addr[10], addr[11], addr[12], addr[13], addr[14], addr[15]} default: return errors.New("dns: bad address family") } return nil } func (e *EDNS0_SUBNET) String() (s string) { if e.Address == nil { s = "" } else if e.Address.To4() != nil { s = e.Address.String() } else { s = "[" + e.Address.String() + "]" } s += "/" + strconv.Itoa(int(e.SourceNetmask)) + "/" + strconv.Itoa(int(e.SourceScope)) return } // The EDNS0_COOKIE option is used to add a DNS Cookie to a message. // // o := new(dns.OPT) // o.Hdr.Name = "." // o.Hdr.Rrtype = dns.TypeOPT // e := new(dns.EDNS0_COOKIE) // e.Code = dns.EDNS0COOKIE // e.Cookie = "24a5ac.." // o.Option = append(o.Option, e) // // The Cookie field consists out of a client cookie (RFC 7873 Section 4), that is // always 8 bytes. It may then optionally be followed by the server cookie. The server // cookie is of variable length, 8 to a maximum of 32 bytes. In other words: // // cCookie := o.Cookie[:16] // sCookie := o.Cookie[16:] // // There is no guarantee that the Cookie string has a specific length. type EDNS0_COOKIE struct { Code uint16 // Always EDNS0COOKIE Cookie string // Hex-encoded cookie data } func (e *EDNS0_COOKIE) pack() ([]byte, error) { h, err := hex.DecodeString(e.Cookie) if err != nil { return nil, err } return h, nil } // Option implements the EDNS0 interface. func (e *EDNS0_COOKIE) Option() uint16 { return EDNS0COOKIE } func (e *EDNS0_COOKIE) unpack(b []byte) error { e.Cookie = hex.EncodeToString(b); return nil } func (e *EDNS0_COOKIE) String() string { return e.Cookie } // The EDNS0_UL (Update Lease) (draft RFC) option is used to tell the server to set // an expiration on an update RR. This is helpful for clients that cannot clean // up after themselves. This is a draft RFC and more information can be found at // http://files.dns-sd.org/draft-sekar-dns-ul.txt // // o := new(dns.OPT) // o.Hdr.Name = "." // o.Hdr.Rrtype = dns.TypeOPT // e := new(dns.EDNS0_UL) // e.Code = dns.EDNS0UL // e.Lease = 120 // in seconds // o.Option = append(o.Option, e) type EDNS0_UL struct { Code uint16 // Always EDNS0UL Lease uint32 } // Option implements the EDNS0 interface. func (e *EDNS0_UL) Option() uint16 { return EDNS0UL } func (e *EDNS0_UL) String() string { return strconv.FormatUint(uint64(e.Lease), 10) } // Copied: http://golang.org/src/pkg/net/dnsmsg.go func (e *EDNS0_UL) pack() ([]byte, error) { b := make([]byte, 4) binary.BigEndian.PutUint32(b, e.Lease) return b, nil } func (e *EDNS0_UL) unpack(b []byte) error { if len(b) < 4 { return ErrBuf } e.Lease = binary.BigEndian.Uint32(b) return nil } // EDNS0_LLQ stands for Long Lived Queries: http://tools.ietf.org/html/draft-sekar-dns-llq-01 // Implemented for completeness, as the EDNS0 type code is assigned. type EDNS0_LLQ struct { Code uint16 // Always EDNS0LLQ Version uint16 Opcode uint16 Error uint16 Id uint64 LeaseLife uint32 } // Option implements the EDNS0 interface. func (e *EDNS0_LLQ) Option() uint16 { return EDNS0LLQ } func (e *EDNS0_LLQ) pack() ([]byte, error) { b := make([]byte, 18) binary.BigEndian.PutUint16(b[0:], e.Version) binary.BigEndian.PutUint16(b[2:], e.Opcode) binary.BigEndian.PutUint16(b[4:], e.Error) binary.BigEndian.PutUint64(b[6:], e.Id) binary.BigEndian.PutUint32(b[14:], e.LeaseLife) return b, nil } func (e *EDNS0_LLQ) unpack(b []byte) error { if len(b) < 18 { return ErrBuf } e.Version = binary.BigEndian.Uint16(b[0:]) e.Opcode = binary.BigEndian.Uint16(b[2:]) e.Error = binary.BigEndian.Uint16(b[4:]) e.Id = binary.BigEndian.Uint64(b[6:]) e.LeaseLife = binary.BigEndian.Uint32(b[14:]) return nil } func (e *EDNS0_LLQ) String() string { s := strconv.FormatUint(uint64(e.Version), 10) + " " + strconv.FormatUint(uint64(e.Opcode), 10) + " " + strconv.FormatUint(uint64(e.Error), 10) + " " + strconv.FormatUint(uint64(e.Id), 10) + " " + strconv.FormatUint(uint64(e.LeaseLife), 10) return s } // EDNS0_DUA implements the EDNS0 "DNSSEC Algorithm Understood" option. See RFC 6975. type EDNS0_DAU struct { Code uint16 // Always EDNS0DAU AlgCode []uint8 } // Option implements the EDNS0 interface. func (e *EDNS0_DAU) Option() uint16 { return EDNS0DAU } func (e *EDNS0_DAU) pack() ([]byte, error) { return e.AlgCode, nil } func (e *EDNS0_DAU) unpack(b []byte) error { e.AlgCode = b; return nil } func (e *EDNS0_DAU) String() string { s := "" for i := 0; i < len(e.AlgCode); i++ { if a, ok := AlgorithmToString[e.AlgCode[i]]; ok { s += " " + a } else { s += " " + strconv.Itoa(int(e.AlgCode[i])) } } return s } // EDNS0_DHU implements the EDNS0 "DS Hash Understood" option. See RFC 6975. type EDNS0_DHU struct { Code uint16 // Always EDNS0DHU AlgCode []uint8 } // Option implements the EDNS0 interface. func (e *EDNS0_DHU) Option() uint16 { return EDNS0DHU } func (e *EDNS0_DHU) pack() ([]byte, error) { return e.AlgCode, nil } func (e *EDNS0_DHU) unpack(b []byte) error { e.AlgCode = b; return nil } func (e *EDNS0_DHU) String() string { s := "" for i := 0; i < len(e.AlgCode); i++ { if a, ok := HashToString[e.AlgCode[i]]; ok { s += " " + a } else { s += " " + strconv.Itoa(int(e.AlgCode[i])) } } return s } // EDNS0_N3U implements the EDNS0 "NSEC3 Hash Understood" option. See RFC 6975. type EDNS0_N3U struct { Code uint16 // Always EDNS0N3U AlgCode []uint8 } // Option implements the EDNS0 interface. func (e *EDNS0_N3U) Option() uint16 { return EDNS0N3U } func (e *EDNS0_N3U) pack() ([]byte, error) { return e.AlgCode, nil } func (e *EDNS0_N3U) unpack(b []byte) error { e.AlgCode = b; return nil } func (e *EDNS0_N3U) String() string { // Re-use the hash map s := "" for i := 0; i < len(e.AlgCode); i++ { if a, ok := HashToString[e.AlgCode[i]]; ok { s += " " + a } else { s += " " + strconv.Itoa(int(e.AlgCode[i])) } } return s } // EDNS0_EXPIRE implementes the EDNS0 option as described in RFC 7314. type EDNS0_EXPIRE struct { Code uint16 // Always EDNS0EXPIRE Expire uint32 } // Option implements the EDNS0 interface. func (e *EDNS0_EXPIRE) Option() uint16 { return EDNS0EXPIRE } func (e *EDNS0_EXPIRE) String() string { return strconv.FormatUint(uint64(e.Expire), 10) } func (e *EDNS0_EXPIRE) pack() ([]byte, error) { b := make([]byte, 4) b[0] = byte(e.Expire >> 24) b[1] = byte(e.Expire >> 16) b[2] = byte(e.Expire >> 8) b[3] = byte(e.Expire) return b, nil } func (e *EDNS0_EXPIRE) unpack(b []byte) error { if len(b) < 4 { return ErrBuf } e.Expire = binary.BigEndian.Uint32(b) return nil } // The EDNS0_LOCAL option is used for local/experimental purposes. The option // code is recommended to be within the range [EDNS0LOCALSTART, EDNS0LOCALEND] // (RFC6891), although any unassigned code can actually be used. The content of // the option is made available in Data, unaltered. // Basic use pattern for creating a local option: // // o := new(dns.OPT) // o.Hdr.Name = "." // o.Hdr.Rrtype = dns.TypeOPT // e := new(dns.EDNS0_LOCAL) // e.Code = dns.EDNS0LOCALSTART // e.Data = []byte{72, 82, 74} // o.Option = append(o.Option, e) type EDNS0_LOCAL struct { Code uint16 Data []byte } // Option implements the EDNS0 interface. func (e *EDNS0_LOCAL) Option() uint16 { return e.Code } func (e *EDNS0_LOCAL) String() string { return strconv.FormatInt(int64(e.Code), 10) + ":0x" + hex.EncodeToString(e.Data) } func (e *EDNS0_LOCAL) pack() ([]byte, error) { b := make([]byte, len(e.Data)) copied := copy(b, e.Data) if copied != len(e.Data) { return nil, ErrBuf } return b, nil } func (e *EDNS0_LOCAL) unpack(b []byte) error { e.Data = make([]byte, len(b)) copied := copy(e.Data, b) if copied != len(b) { return ErrBuf } return nil } // EDNS0_TCP_KEEPALIVE is an EDNS0 option that instructs the server to keep // the TCP connection alive. See RFC 7828. type EDNS0_TCP_KEEPALIVE struct { Code uint16 // Always EDNSTCPKEEPALIVE Length uint16 // the value 0 if the TIMEOUT is omitted, the value 2 if it is present; Timeout uint16 // an idle timeout value for the TCP connection, specified in units of 100 milliseconds, encoded in network byte order. } // Option implements the EDNS0 interface. func (e *EDNS0_TCP_KEEPALIVE) Option() uint16 { return EDNS0TCPKEEPALIVE } func (e *EDNS0_TCP_KEEPALIVE) pack() ([]byte, error) { if e.Timeout != 0 && e.Length != 2 { return nil, errors.New("dns: timeout specified but length is not 2") } if e.Timeout == 0 && e.Length != 0 { return nil, errors.New("dns: timeout not specified but length is not 0") } b := make([]byte, 4+e.Length) binary.BigEndian.PutUint16(b[0:], e.Code) binary.BigEndian.PutUint16(b[2:], e.Length) if e.Length == 2 { binary.BigEndian.PutUint16(b[4:], e.Timeout) } return b, nil } func (e *EDNS0_TCP_KEEPALIVE) unpack(b []byte) error { if len(b) < 4 { return ErrBuf } e.Length = binary.BigEndian.Uint16(b[2:4]) if e.Length != 0 && e.Length != 2 { return errors.New("dns: length mismatch, want 0/2 but got " + strconv.FormatUint(uint64(e.Length), 10)) } if e.Length == 2 { if len(b) < 6 { return ErrBuf } e.Timeout = binary.BigEndian.Uint16(b[4:6]) } return nil } func (e *EDNS0_TCP_KEEPALIVE) String() (s string) { s = "use tcp keep-alive" if e.Length == 0 { s += ", timeout omitted" } else { s += fmt.Sprintf(", timeout %dms", e.Timeout*100) } return } // EDNS0_PADDING option is used to add padding to a request/response. The default // value of padding SHOULD be 0x0 but other values MAY be used, for instance if // compression is applied before encryption which may break signatures. type EDNS0_PADDING struct { Padding []byte } // Option implements the EDNS0 interface. func (e *EDNS0_PADDING) Option() uint16 { return EDNS0PADDING } func (e *EDNS0_PADDING) pack() ([]byte, error) { return e.Padding, nil } func (e *EDNS0_PADDING) unpack(b []byte) error { e.Padding = b; return nil } func (e *EDNS0_PADDING) String() string { return fmt.Sprintf("%0X", e.Padding) } golang-github-miekg-dns-1.0.4+ds/edns_test.go000066400000000000000000000031311325625637500210540ustar00rootroot00000000000000package dns import "testing" func TestOPTTtl(t *testing.T) { e := &OPT{} e.Hdr.Name = "." e.Hdr.Rrtype = TypeOPT // verify the default setting of DO=0 if e.Do() { t.Errorf("DO bit should be zero") } // There are 6 possible invocations of SetDo(): // // 1. Starting with DO=0, using SetDo() // 2. Starting with DO=0, using SetDo(true) // 3. Starting with DO=0, using SetDo(false) // 4. Starting with DO=1, using SetDo() // 5. Starting with DO=1, using SetDo(true) // 6. Starting with DO=1, using SetDo(false) // verify that invoking SetDo() sets DO=1 (TEST #1) e.SetDo() if !e.Do() { t.Errorf("DO bit should be non-zero") } // verify that using SetDo(true) works when DO=1 (TEST #5) e.SetDo(true) if !e.Do() { t.Errorf("DO bit should still be non-zero") } // verify that we can use SetDo(false) to set DO=0 (TEST #6) e.SetDo(false) if e.Do() { t.Errorf("DO bit should be zero") } // verify that if we call SetDo(false) when DO=0 that it is unchanged (TEST #3) e.SetDo(false) if e.Do() { t.Errorf("DO bit should still be zero") } // verify that using SetDo(true) works for DO=0 (TEST #2) e.SetDo(true) if !e.Do() { t.Errorf("DO bit should be non-zero") } // verify that using SetDo() works for DO=1 (TEST #4) e.SetDo() if !e.Do() { t.Errorf("DO bit should be non-zero") } if e.Version() != 0 { t.Errorf("version should be non-zero") } e.SetVersion(42) if e.Version() != 42 { t.Errorf("set 42, expected %d, got %d", 42, e.Version()) } e.SetExtendedRcode(42) if e.ExtendedRcode() != 42 { t.Errorf("set 42, expected %d, got %d", 42, e.ExtendedRcode()) } } golang-github-miekg-dns-1.0.4+ds/example_test.go000066400000000000000000000061741325625637500215700ustar00rootroot00000000000000package dns_test import ( "errors" "fmt" "log" "net" "github.com/miekg/dns" ) // Retrieve the MX records for miek.nl. func ExampleMX() { config, _ := dns.ClientConfigFromFile("/etc/resolv.conf") c := new(dns.Client) m := new(dns.Msg) m.SetQuestion("miek.nl.", dns.TypeMX) m.RecursionDesired = true r, _, err := c.Exchange(m, config.Servers[0]+":"+config.Port) if err != nil { return } if r.Rcode != dns.RcodeSuccess { return } for _, a := range r.Answer { if mx, ok := a.(*dns.MX); ok { fmt.Printf("%s\n", mx.String()) } } } // Retrieve the DNSKEY records of a zone and convert them // to DS records for SHA1, SHA256 and SHA384. func ExampleDS() { config, _ := dns.ClientConfigFromFile("/etc/resolv.conf") c := new(dns.Client) m := new(dns.Msg) zone := "miek.nl" m.SetQuestion(dns.Fqdn(zone), dns.TypeDNSKEY) m.SetEdns0(4096, true) r, _, err := c.Exchange(m, config.Servers[0]+":"+config.Port) if err != nil { return } if r.Rcode != dns.RcodeSuccess { return } for _, k := range r.Answer { if key, ok := k.(*dns.DNSKEY); ok { for _, alg := range []uint8{dns.SHA1, dns.SHA256, dns.SHA384} { fmt.Printf("%s; %d\n", key.ToDS(alg).String(), key.Flags) } } } } const TypeAPAIR = 0x0F99 type APAIR struct { addr [2]net.IP } func NewAPAIR() dns.PrivateRdata { return new(APAIR) } func (rd *APAIR) String() string { return rd.addr[0].String() + " " + rd.addr[1].String() } func (rd *APAIR) Parse(txt []string) error { if len(txt) != 2 { return errors.New("two addresses required for APAIR") } for i, s := range txt { ip := net.ParseIP(s) if ip == nil { return errors.New("invalid IP in APAIR text representation") } rd.addr[i] = ip } return nil } func (rd *APAIR) Pack(buf []byte) (int, error) { b := append([]byte(rd.addr[0]), []byte(rd.addr[1])...) n := copy(buf, b) if n != len(b) { return n, dns.ErrBuf } return n, nil } func (rd *APAIR) Unpack(buf []byte) (int, error) { ln := net.IPv4len * 2 if len(buf) != ln { return 0, errors.New("invalid length of APAIR rdata") } cp := make([]byte, ln) copy(cp, buf) // clone bytes to use them in IPs rd.addr[0] = net.IP(cp[:3]) rd.addr[1] = net.IP(cp[4:]) return len(buf), nil } func (rd *APAIR) Copy(dest dns.PrivateRdata) error { cp := make([]byte, rd.Len()) _, err := rd.Pack(cp) if err != nil { return err } d := dest.(*APAIR) d.addr[0] = net.IP(cp[:3]) d.addr[1] = net.IP(cp[4:]) return nil } func (rd *APAIR) Len() int { return net.IPv4len * 2 } func ExamplePrivateHandle() { dns.PrivateHandle("APAIR", TypeAPAIR, NewAPAIR) defer dns.PrivateHandleRemove(TypeAPAIR) rr, err := dns.NewRR("miek.nl. APAIR (1.2.3.4 1.2.3.5)") if err != nil { log.Fatal("could not parse APAIR record: ", err) } fmt.Println(rr) // Output: miek.nl. 3600 IN APAIR 1.2.3.4 1.2.3.5 m := new(dns.Msg) m.Id = 12345 m.SetQuestion("miek.nl.", TypeAPAIR) m.Answer = append(m.Answer, rr) fmt.Println(m) // ;; opcode: QUERY, status: NOERROR, id: 12345 // ;; flags: rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 // // ;; QUESTION SECTION: // ;miek.nl. IN APAIR // // ;; ANSWER SECTION: // miek.nl. 3600 IN APAIR 1.2.3.4 1.2.3.5 } golang-github-miekg-dns-1.0.4+ds/format.go000066400000000000000000000044741325625637500203670ustar00rootroot00000000000000package dns import ( "net" "reflect" "strconv" ) // NumField returns the number of rdata fields r has. func NumField(r RR) int { return reflect.ValueOf(r).Elem().NumField() - 1 // Remove RR_Header } // Field returns the rdata field i as a string. Fields are indexed starting from 1. // RR types that holds slice data, for instance the NSEC type bitmap will return a single // string where the types are concatenated using a space. // Accessing non existing fields will cause a panic. func Field(r RR, i int) string { if i == 0 { return "" } d := reflect.ValueOf(r).Elem().Field(i) switch k := d.Kind(); k { case reflect.String: return d.String() case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: return strconv.FormatInt(d.Int(), 10) case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64: return strconv.FormatUint(d.Uint(), 10) case reflect.Slice: switch reflect.ValueOf(r).Elem().Type().Field(i).Tag { case `dns:"a"`: // TODO(miek): Hmm store this as 16 bytes if d.Len() < net.IPv6len { return net.IPv4(byte(d.Index(0).Uint()), byte(d.Index(1).Uint()), byte(d.Index(2).Uint()), byte(d.Index(3).Uint())).String() } return net.IPv4(byte(d.Index(12).Uint()), byte(d.Index(13).Uint()), byte(d.Index(14).Uint()), byte(d.Index(15).Uint())).String() case `dns:"aaaa"`: return net.IP{ byte(d.Index(0).Uint()), byte(d.Index(1).Uint()), byte(d.Index(2).Uint()), byte(d.Index(3).Uint()), byte(d.Index(4).Uint()), byte(d.Index(5).Uint()), byte(d.Index(6).Uint()), byte(d.Index(7).Uint()), byte(d.Index(8).Uint()), byte(d.Index(9).Uint()), byte(d.Index(10).Uint()), byte(d.Index(11).Uint()), byte(d.Index(12).Uint()), byte(d.Index(13).Uint()), byte(d.Index(14).Uint()), byte(d.Index(15).Uint()), }.String() case `dns:"nsec"`: if d.Len() == 0 { return "" } s := Type(d.Index(0).Uint()).String() for i := 1; i < d.Len(); i++ { s += " " + Type(d.Index(i).Uint()).String() } return s default: // if it does not have a tag its a string slice fallthrough case `dns:"txt"`: if d.Len() == 0 { return "" } s := d.Index(0).String() for i := 1; i < d.Len(); i++ { s += " " + d.Index(i).String() } return s } } return "" } golang-github-miekg-dns-1.0.4+ds/fuzz.go000066400000000000000000000004631325625637500200670ustar00rootroot00000000000000// +build fuzz package dns func Fuzz(data []byte) int { msg := new(Msg) if err := msg.Unpack(data); err != nil { return 0 } if _, err := msg.Pack(); err != nil { return 0 } return 1 } func FuzzNewRR(data []byte) int { if _, err := NewRR(string(data)); err != nil { return 0 } return 1 } golang-github-miekg-dns-1.0.4+ds/generate.go000066400000000000000000000074211325625637500206640ustar00rootroot00000000000000package dns import ( "bytes" "errors" "fmt" "strconv" "strings" ) // Parse the $GENERATE statement as used in BIND9 zones. // See http://www.zytrax.com/books/dns/ch8/generate.html for instance. // We are called after '$GENERATE '. After which we expect: // * the range (12-24/2) // * lhs (ownername) // * [[ttl][class]] // * type // * rhs (rdata) // But we are lazy here, only the range is parsed *all* occurrences // of $ after that are interpreted. // Any error are returned as a string value, the empty string signals // "no error". func generate(l lex, c chan lex, t chan *Token, o string) string { step := 1 if i := strings.IndexAny(l.token, "/"); i != -1 { if i+1 == len(l.token) { return "bad step in $GENERATE range" } if s, err := strconv.Atoi(l.token[i+1:]); err == nil { if s < 0 { return "bad step in $GENERATE range" } step = s } else { return "bad step in $GENERATE range" } l.token = l.token[:i] } sx := strings.SplitN(l.token, "-", 2) if len(sx) != 2 { return "bad start-stop in $GENERATE range" } start, err := strconv.Atoi(sx[0]) if err != nil { return "bad start in $GENERATE range" } end, err := strconv.Atoi(sx[1]) if err != nil { return "bad stop in $GENERATE range" } if end < 0 || start < 0 || end < start { return "bad range in $GENERATE range" } <-c // _BLANK // Create a complete new string, which we then parse again. s := "" BuildRR: l = <-c if l.value != zNewline && l.value != zEOF { s += l.token goto BuildRR } for i := start; i <= end; i += step { var ( escape bool dom bytes.Buffer mod string err error offset int ) for j := 0; j < len(s); j++ { // No 'range' because we need to jump around switch s[j] { case '\\': if escape { dom.WriteByte('\\') escape = false continue } escape = true case '$': mod = "%d" offset = 0 if escape { dom.WriteByte('$') escape = false continue } escape = false if j+1 >= len(s) { // End of the string dom.WriteString(fmt.Sprintf(mod, i+offset)) continue } else { if s[j+1] == '$' { dom.WriteByte('$') j++ continue } } // Search for { and } if s[j+1] == '{' { // Modifier block sep := strings.Index(s[j+2:], "}") if sep == -1 { return "bad modifier in $GENERATE" } mod, offset, err = modToPrintf(s[j+2 : j+2+sep]) if err != nil { return err.Error() } j += 2 + sep // Jump to it } dom.WriteString(fmt.Sprintf(mod, i+offset)) default: if escape { // Pretty useless here escape = false continue } dom.WriteByte(s[j]) } } // Re-parse the RR and send it on the current channel t rx, err := NewRR("$ORIGIN " + o + "\n" + dom.String()) if err != nil { return err.Error() } t <- &Token{RR: rx} // Its more efficient to first built the rrlist and then parse it in // one go! But is this a problem? } return "" } // Convert a $GENERATE modifier 0,0,d to something Printf can deal with. func modToPrintf(s string) (string, int, error) { xs := strings.SplitN(s, ",", 3) if len(xs) != 3 { return "", 0, errors.New("bad modifier in $GENERATE") } // xs[0] is offset, xs[1] is width, xs[2] is base if xs[2] != "o" && xs[2] != "d" && xs[2] != "x" && xs[2] != "X" { return "", 0, errors.New("bad base in $GENERATE") } offset, err := strconv.Atoi(xs[0]) if err != nil || offset > 255 { return "", 0, errors.New("bad offset in $GENERATE") } width, err := strconv.Atoi(xs[1]) if err != nil || width > 255 { return "", offset, errors.New("bad width in $GENERATE") } switch { case width < 0: return "", offset, errors.New("bad width in $GENERATE") case width == 0: return "%" + xs[1] + xs[2], offset, nil } return "%0" + xs[1] + xs[2], offset, nil } golang-github-miekg-dns-1.0.4+ds/issue_test.go000066400000000000000000000030501325625637500212530ustar00rootroot00000000000000package dns // Tests that solve that an specific issue. import ( "strings" "testing" ) func TestTCPRtt(t *testing.T) { m := new(Msg) m.RecursionDesired = true m.SetQuestion("example.org.", TypeA) c := &Client{} for _, proto := range []string{"udp", "tcp"} { c.Net = proto _, rtt, err := c.Exchange(m, "8.8.4.4:53") if err != nil { t.Fatal(err) } if rtt == 0 { t.Fatalf("expecting non zero rtt %s, got zero", c.Net) } } } func TestNSEC3MissingSalt(t *testing.T) { rr := testRR("ji6neoaepv8b5o6k4ev33abha8ht9fgc.example. NSEC3 1 1 12 aabbccdd K8UDEMVP1J2F7EG6JEBPS17VP3N8I58H") m := new(Msg) m.Answer = []RR{rr} mb, err := m.Pack() if err != nil { t.Fatalf("expected to pack message. err: %s", err) } if err := m.Unpack(mb); err != nil { t.Fatalf("expected to unpack message. missing salt? err: %s", err) } in := rr.(*NSEC3).Salt out := m.Answer[0].(*NSEC3).Salt if in != out { t.Fatalf("expected salts to match. packed: `%s`. returned: `%s`", in, out) } } func TestNSEC3MixedNextDomain(t *testing.T) { rr := testRR("ji6neoaepv8b5o6k4ev33abha8ht9fgc.example. NSEC3 1 1 12 - k8udemvp1j2f7eg6jebps17vp3n8i58h") m := new(Msg) m.Answer = []RR{rr} mb, err := m.Pack() if err != nil { t.Fatalf("expected to pack message. err: %s", err) } if err := m.Unpack(mb); err != nil { t.Fatalf("expected to unpack message. err: %s", err) } in := strings.ToUpper(rr.(*NSEC3).NextDomain) out := m.Answer[0].(*NSEC3).NextDomain if in != out { t.Fatalf("expected round trip to produce NextDomain `%s`, instead `%s`", in, out) } } golang-github-miekg-dns-1.0.4+ds/labels.go000066400000000000000000000077721325625637500203450ustar00rootroot00000000000000package dns // Holds a bunch of helper functions for dealing with labels. // SplitDomainName splits a name string into it's labels. // www.miek.nl. returns []string{"www", "miek", "nl"} // .www.miek.nl. returns []string{"", "www", "miek", "nl"}, // The root label (.) returns nil. Note that using // strings.Split(s) will work in most cases, but does not handle // escaped dots (\.) for instance. // s must be a syntactically valid domain name, see IsDomainName. func SplitDomainName(s string) (labels []string) { if len(s) == 0 { return nil } fqdnEnd := 0 // offset of the final '.' or the length of the name idx := Split(s) begin := 0 if s[len(s)-1] == '.' { fqdnEnd = len(s) - 1 } else { fqdnEnd = len(s) } switch len(idx) { case 0: return nil case 1: // no-op default: end := 0 for i := 1; i < len(idx); i++ { end = idx[i] labels = append(labels, s[begin:end-1]) begin = end } } labels = append(labels, s[begin:fqdnEnd]) return labels } // CompareDomainName compares the names s1 and s2 and // returns how many labels they have in common starting from the *right*. // The comparison stops at the first inequality. The names are downcased // before the comparison. // // www.miek.nl. and miek.nl. have two labels in common: miek and nl // www.miek.nl. and www.bla.nl. have one label in common: nl // // s1 and s2 must be syntactically valid domain names. func CompareDomainName(s1, s2 string) (n int) { // the first check: root label if s1 == "." || s2 == "." { return 0 } l1 := Split(s1) l2 := Split(s2) j1 := len(l1) - 1 // end i1 := len(l1) - 2 // start j2 := len(l2) - 1 i2 := len(l2) - 2 // the second check can be done here: last/only label // before we fall through into the for-loop below if equal(s1[l1[j1]:], s2[l2[j2]:]) { n++ } else { return } for { if i1 < 0 || i2 < 0 { break } if equal(s1[l1[i1]:l1[j1]], s2[l2[i2]:l2[j2]]) { n++ } else { break } j1-- i1-- j2-- i2-- } return } // CountLabel counts the the number of labels in the string s. // s must be a syntactically valid domain name. func CountLabel(s string) (labels int) { if s == "." { return } off := 0 end := false for { off, end = NextLabel(s, off) labels++ if end { return } } } // Split splits a name s into its label indexes. // www.miek.nl. returns []int{0, 4, 9}, www.miek.nl also returns []int{0, 4, 9}. // The root name (.) returns nil. Also see SplitDomainName. // s must be a syntactically valid domain name. func Split(s string) []int { if s == "." { return nil } idx := make([]int, 1, 3) off := 0 end := false for { off, end = NextLabel(s, off) if end { return idx } idx = append(idx, off) } } // NextLabel returns the index of the start of the next label in the // string s starting at offset. // The bool end is true when the end of the string has been reached. // Also see PrevLabel. func NextLabel(s string, offset int) (i int, end bool) { quote := false for i = offset; i < len(s)-1; i++ { switch s[i] { case '\\': quote = !quote default: quote = false case '.': if quote { quote = !quote continue } return i + 1, false } } return i + 1, true } // PrevLabel returns the index of the label when starting from the right and // jumping n labels to the left. // The bool start is true when the start of the string has been overshot. // Also see NextLabel. func PrevLabel(s string, n int) (i int, start bool) { if n == 0 { return len(s), false } lab := Split(s) if lab == nil { return 0, true } if n > len(lab) { return 0, true } return lab[len(lab)-n], false } // equal compares a and b while ignoring case. It returns true when equal otherwise false. func equal(a, b string) bool { // might be lifted into API function. la := len(a) lb := len(b) if la != lb { return false } for i := la - 1; i >= 0; i-- { ai := a[i] bi := b[i] if ai >= 'A' && ai <= 'Z' { ai |= ('a' - 'A') } if bi >= 'A' && bi <= 'Z' { bi |= ('a' - 'A') } if ai != bi { return false } } return true } golang-github-miekg-dns-1.0.4+ds/labels_test.go000066400000000000000000000110111325625637500213610ustar00rootroot00000000000000package dns import "testing" func TestCompareDomainName(t *testing.T) { s1 := "www.miek.nl." s2 := "miek.nl." s3 := "www.bla.nl." s4 := "nl.www.bla." s5 := "nl." s6 := "miek.nl." if CompareDomainName(s1, s2) != 2 { t.Errorf("%s with %s should be %d", s1, s2, 2) } if CompareDomainName(s1, s3) != 1 { t.Errorf("%s with %s should be %d", s1, s3, 1) } if CompareDomainName(s3, s4) != 0 { t.Errorf("%s with %s should be %d", s3, s4, 0) } // Non qualified tests if CompareDomainName(s1, s5) != 1 { t.Errorf("%s with %s should be %d", s1, s5, 1) } if CompareDomainName(s1, s6) != 2 { t.Errorf("%s with %s should be %d", s1, s5, 2) } if CompareDomainName(s1, ".") != 0 { t.Errorf("%s with %s should be %d", s1, s5, 0) } if CompareDomainName(".", ".") != 0 { t.Errorf("%s with %s should be %d", ".", ".", 0) } if CompareDomainName("test.com.", "TEST.COM.") != 2 { t.Errorf("test.com. and TEST.COM. should be an exact match") } } func TestSplit(t *testing.T) { splitter := map[string]int{ "www.miek.nl.": 3, "www.miek.nl": 3, "www..miek.nl": 4, `www\.miek.nl.`: 2, `www\\.miek.nl.`: 3, ".": 0, "nl.": 1, "nl": 1, "com.": 1, ".com.": 2, } for s, i := range splitter { if x := len(Split(s)); x != i { t.Errorf("labels should be %d, got %d: %s %v", i, x, s, Split(s)) } } } func TestSplit2(t *testing.T) { splitter := map[string][]int{ "www.miek.nl.": {0, 4, 9}, "www.miek.nl": {0, 4, 9}, "nl": {0}, } for s, i := range splitter { x := Split(s) switch len(i) { case 1: if x[0] != i[0] { t.Errorf("labels should be %v, got %v: %s", i, x, s) } default: if x[0] != i[0] || x[1] != i[1] || x[2] != i[2] { t.Errorf("labels should be %v, got %v: %s", i, x, s) } } } } func TestPrevLabel(t *testing.T) { type prev struct { string int } prever := map[prev]int{ {"www.miek.nl.", 0}: 12, {"www.miek.nl.", 1}: 9, {"www.miek.nl.", 2}: 4, {"www.miek.nl", 0}: 11, {"www.miek.nl", 1}: 9, {"www.miek.nl", 2}: 4, {"www.miek.nl.", 5}: 0, {"www.miek.nl", 5}: 0, {"www.miek.nl.", 3}: 0, {"www.miek.nl", 3}: 0, } for s, i := range prever { x, ok := PrevLabel(s.string, s.int) if i != x { t.Errorf("label should be %d, got %d, %t: preving %d, %s", i, x, ok, s.int, s.string) } } } func TestCountLabel(t *testing.T) { splitter := map[string]int{ "www.miek.nl.": 3, "www.miek.nl": 3, "nl": 1, ".": 0, } for s, i := range splitter { x := CountLabel(s) if x != i { t.Errorf("CountLabel should have %d, got %d", i, x) } } } func TestSplitDomainName(t *testing.T) { labels := map[string][]string{ "miek.nl": {"miek", "nl"}, ".": nil, "www.miek.nl.": {"www", "miek", "nl"}, "www.miek.nl": {"www", "miek", "nl"}, "www..miek.nl": {"www", "", "miek", "nl"}, `www\.miek.nl`: {`www\.miek`, "nl"}, `www\\.miek.nl`: {`www\\`, "miek", "nl"}, ".www.miek.nl.": {"", "www", "miek", "nl"}, } domainLoop: for domain, splits := range labels { parts := SplitDomainName(domain) if len(parts) != len(splits) { t.Errorf("SplitDomainName returned %v for %s, expected %v", parts, domain, splits) continue domainLoop } for i := range parts { if parts[i] != splits[i] { t.Errorf("SplitDomainName returned %v for %s, expected %v", parts, domain, splits) continue domainLoop } } } } func TestIsDomainName(t *testing.T) { type ret struct { ok bool lab int } names := map[string]*ret{ "..": {false, 1}, "@.": {true, 1}, "www.example.com": {true, 3}, "www.e%ample.com": {true, 3}, "www.example.com.": {true, 3}, "mi\\k.nl.": {true, 2}, "mi\\k.nl": {true, 2}, } for d, ok := range names { l, k := IsDomainName(d) if ok.ok != k || ok.lab != l { t.Errorf(" got %v %d for %s ", k, l, d) t.Errorf("have %v %d for %s ", ok.ok, ok.lab, d) } } } func BenchmarkSplitLabels(b *testing.B) { for i := 0; i < b.N; i++ { Split("www.example.com.") } } func BenchmarkLenLabels(b *testing.B) { for i := 0; i < b.N; i++ { CountLabel("www.example.com.") } } func BenchmarkCompareDomainName(b *testing.B) { b.ReportAllocs() for i := 0; i < b.N; i++ { CompareDomainName("www.example.com.", "aa.example.com.") } } func BenchmarkIsSubDomain(b *testing.B) { b.ReportAllocs() for i := 0; i < b.N; i++ { IsSubDomain("www.example.com.", "aa.example.com.") IsSubDomain("example.com.", "aa.example.com.") IsSubDomain("miek.nl.", "aa.example.com.") } } golang-github-miekg-dns-1.0.4+ds/leak_test.go000066400000000000000000000034731325625637500210500ustar00rootroot00000000000000package dns import ( "fmt" "os" "runtime" "sort" "strings" "testing" "time" ) // copied from net/http/main_test.go func interestingGoroutines() (gs []string) { buf := make([]byte, 2<<20) buf = buf[:runtime.Stack(buf, true)] for _, g := range strings.Split(string(buf), "\n\n") { sl := strings.SplitN(g, "\n", 2) if len(sl) != 2 { continue } stack := strings.TrimSpace(sl[1]) if stack == "" || strings.Contains(stack, "testing.(*M).before.func1") || strings.Contains(stack, "os/signal.signal_recv") || strings.Contains(stack, "created by net.startServer") || strings.Contains(stack, "created by testing.RunTests") || strings.Contains(stack, "closeWriteAndWait") || strings.Contains(stack, "testing.Main(") || strings.Contains(stack, "testing.(*T).Run(") || // These only show up with GOTRACEBACK=2; Issue 5005 (comment 28) strings.Contains(stack, "runtime.goexit") || strings.Contains(stack, "created by runtime.gc") || strings.Contains(stack, "dns.interestingGoroutines") || strings.Contains(stack, "runtime.MHeap_Scavenger") { continue } gs = append(gs, stack) } sort.Strings(gs) return } func goroutineLeaked() error { if testing.Short() { // Don't worry about goroutine leaks in -short mode or in // benchmark mode. Too distracting when there are false positives. return nil } var stackCount map[string]int for i := 0; i < 5; i++ { n := 0 stackCount = make(map[string]int) gs := interestingGoroutines() for _, g := range gs { stackCount[g]++ n++ } if n == 0 { return nil } // Wait for goroutines to schedule and die off: time.Sleep(100 * time.Millisecond) } for stack, count := range stackCount { fmt.Fprintf(os.Stderr, "%d instances of:\n%s\n", count, stack) } return fmt.Errorf("too many goroutines running after dns test(s)") } golang-github-miekg-dns-1.0.4+ds/msg.go000066400000000000000000000736651325625637500176750ustar00rootroot00000000000000// DNS packet assembly, see RFC 1035. Converting from - Unpack() - // and to - Pack() - wire format. // All the packers and unpackers take a (msg []byte, off int) // and return (off1 int, ok bool). If they return ok==false, they // also return off1==len(msg), so that the next unpacker will // also fail. This lets us avoid checks of ok until the end of a // packing sequence. package dns //go:generate go run msg_generate.go //go:generate go run compress_generate.go import ( crand "crypto/rand" "encoding/binary" "fmt" "math/big" "math/rand" "strconv" "sync" ) const ( maxCompressionOffset = 2 << 13 // We have 14 bits for the compression pointer maxDomainNameWireOctets = 255 // See RFC 1035 section 2.3.4 ) // Errors defined in this package. var ( ErrAlg error = &Error{err: "bad algorithm"} // ErrAlg indicates an error with the (DNSSEC) algorithm. ErrAuth error = &Error{err: "bad authentication"} // ErrAuth indicates an error in the TSIG authentication. ErrBuf error = &Error{err: "buffer size too small"} // ErrBuf indicates that the buffer used is too small for the message. ErrConnEmpty error = &Error{err: "conn has no connection"} // ErrConnEmpty indicates a connection is being used before it is initialized. ErrExtendedRcode error = &Error{err: "bad extended rcode"} // ErrExtendedRcode ... ErrFqdn error = &Error{err: "domain must be fully qualified"} // ErrFqdn indicates that a domain name does not have a closing dot. ErrId error = &Error{err: "id mismatch"} // ErrId indicates there is a mismatch with the message's ID. ErrKeyAlg error = &Error{err: "bad key algorithm"} // ErrKeyAlg indicates that the algorithm in the key is not valid. ErrKey error = &Error{err: "bad key"} ErrKeySize error = &Error{err: "bad key size"} ErrLongDomain error = &Error{err: fmt.Sprintf("domain name exceeded %d wire-format octets", maxDomainNameWireOctets)} ErrNoSig error = &Error{err: "no signature found"} ErrPrivKey error = &Error{err: "bad private key"} ErrRcode error = &Error{err: "bad rcode"} ErrRdata error = &Error{err: "bad rdata"} ErrRRset error = &Error{err: "bad rrset"} ErrSecret error = &Error{err: "no secrets defined"} ErrShortRead error = &Error{err: "short read"} ErrSig error = &Error{err: "bad signature"} // ErrSig indicates that a signature can not be cryptographically validated. ErrSoa error = &Error{err: "no SOA"} // ErrSOA indicates that no SOA RR was seen when doing zone transfers. ErrTime error = &Error{err: "bad time"} // ErrTime indicates a timing error in TSIG authentication. ErrTruncated error = &Error{err: "failed to unpack truncated message"} // ErrTruncated indicates that we failed to unpack a truncated message. We unpacked as much as we had so Msg can still be used, if desired. ) // Id by default, returns a 16 bits random number to be used as a // message id. The random provided should be good enough. This being a // variable the function can be reassigned to a custom function. // For instance, to make it return a static value: // // dns.Id = func() uint16 { return 3 } var Id = id var ( idLock sync.Mutex idRand *rand.Rand ) // id returns a 16 bits random number to be used as a // message id. The random provided should be good enough. func id() uint16 { idLock.Lock() if idRand == nil { // This (partially) works around // https://github.com/golang/go/issues/11833 by only // seeding idRand upon the first call to id. var seed int64 var buf [8]byte if _, err := crand.Read(buf[:]); err == nil { seed = int64(binary.LittleEndian.Uint64(buf[:])) } else { seed = rand.Int63() } idRand = rand.New(rand.NewSource(seed)) } // The call to idRand.Uint32 must be within the // mutex lock because *rand.Rand is not safe for // concurrent use. // // There is no added performance overhead to calling // idRand.Uint32 inside a mutex lock over just // calling rand.Uint32 as the global math/rand rng // is internally protected by a sync.Mutex. id := uint16(idRand.Uint32()) idLock.Unlock() return id } // MsgHdr is a a manually-unpacked version of (id, bits). type MsgHdr struct { Id uint16 Response bool Opcode int Authoritative bool Truncated bool RecursionDesired bool RecursionAvailable bool Zero bool AuthenticatedData bool CheckingDisabled bool Rcode int } // Msg contains the layout of a DNS message. type Msg struct { MsgHdr Compress bool `json:"-"` // If true, the message will be compressed when converted to wire format. Question []Question // Holds the RR(s) of the question section. Answer []RR // Holds the RR(s) of the answer section. Ns []RR // Holds the RR(s) of the authority section. Extra []RR // Holds the RR(s) of the additional section. } // ClassToString is a maps Classes to strings for each CLASS wire type. var ClassToString = map[uint16]string{ ClassINET: "IN", ClassCSNET: "CS", ClassCHAOS: "CH", ClassHESIOD: "HS", ClassNONE: "NONE", ClassANY: "ANY", } // OpcodeToString maps Opcodes to strings. var OpcodeToString = map[int]string{ OpcodeQuery: "QUERY", OpcodeIQuery: "IQUERY", OpcodeStatus: "STATUS", OpcodeNotify: "NOTIFY", OpcodeUpdate: "UPDATE", } // RcodeToString maps Rcodes to strings. var RcodeToString = map[int]string{ RcodeSuccess: "NOERROR", RcodeFormatError: "FORMERR", RcodeServerFailure: "SERVFAIL", RcodeNameError: "NXDOMAIN", RcodeNotImplemented: "NOTIMPL", RcodeRefused: "REFUSED", RcodeYXDomain: "YXDOMAIN", // See RFC 2136 RcodeYXRrset: "YXRRSET", RcodeNXRrset: "NXRRSET", RcodeNotAuth: "NOTAUTH", RcodeNotZone: "NOTZONE", RcodeBadSig: "BADSIG", // Also known as RcodeBadVers, see RFC 6891 // RcodeBadVers: "BADVERS", RcodeBadKey: "BADKEY", RcodeBadTime: "BADTIME", RcodeBadMode: "BADMODE", RcodeBadName: "BADNAME", RcodeBadAlg: "BADALG", RcodeBadTrunc: "BADTRUNC", RcodeBadCookie: "BADCOOKIE", } // Domain names are a sequence of counted strings // split at the dots. They end with a zero-length string. // PackDomainName packs a domain name s into msg[off:]. // If compression is wanted compress must be true and the compression // map needs to hold a mapping between domain names and offsets // pointing into msg. func PackDomainName(s string, msg []byte, off int, compression map[string]int, compress bool) (off1 int, err error) { off1, _, err = packDomainName(s, msg, off, compression, compress) return } func packDomainName(s string, msg []byte, off int, compression map[string]int, compress bool) (off1 int, labels int, err error) { // special case if msg == nil lenmsg := 256 if msg != nil { lenmsg = len(msg) } ls := len(s) if ls == 0 { // Ok, for instance when dealing with update RR without any rdata. return off, 0, nil } // If not fully qualified, error out, but only if msg == nil #ugly switch { case msg == nil: if s[ls-1] != '.' { s += "." ls++ } case msg != nil: if s[ls-1] != '.' { return lenmsg, 0, ErrFqdn } } // Each dot ends a segment of the name. // We trade each dot byte for a length byte. // Except for escaped dots (\.), which are normal dots. // There is also a trailing zero. // Compression nameoffset := -1 pointer := -1 // Emit sequence of counted strings, chopping at dots. begin := 0 bs := []byte(s) roBs, bsFresh, escapedDot := s, true, false for i := 0; i < ls; i++ { if bs[i] == '\\' { for j := i; j < ls-1; j++ { bs[j] = bs[j+1] } ls-- if off+1 > lenmsg { return lenmsg, labels, ErrBuf } // check for \DDD if i+2 < ls && isDigit(bs[i]) && isDigit(bs[i+1]) && isDigit(bs[i+2]) { bs[i] = dddToByte(bs[i:]) for j := i + 1; j < ls-2; j++ { bs[j] = bs[j+2] } ls -= 2 } escapedDot = bs[i] == '.' bsFresh = false continue } if bs[i] == '.' { if i > 0 && bs[i-1] == '.' && !escapedDot { // two dots back to back is not legal return lenmsg, labels, ErrRdata } if i-begin >= 1<<6 { // top two bits of length must be clear return lenmsg, labels, ErrRdata } // off can already (we're in a loop) be bigger than len(msg) // this happens when a name isn't fully qualified if off+1 > lenmsg { return lenmsg, labels, ErrBuf } if msg != nil { msg[off] = byte(i - begin) } offset := off off++ for j := begin; j < i; j++ { if off+1 > lenmsg { return lenmsg, labels, ErrBuf } if msg != nil { msg[off] = bs[j] } off++ } if compress && !bsFresh { roBs = string(bs) bsFresh = true } // Don't try to compress '.' // We should only compress when compress it true, but we should also still pick // up names that can be used for *future* compression(s). if compression != nil && roBs[begin:] != "." { if p, ok := compression[roBs[begin:]]; !ok { // Only offsets smaller than this can be used. if offset < maxCompressionOffset { compression[roBs[begin:]] = offset } } else { // The first hit is the longest matching dname // keep the pointer offset we get back and store // the offset of the current name, because that's // where we need to insert the pointer later // If compress is true, we're allowed to compress this dname if pointer == -1 && compress { pointer = p // Where to point to nameoffset = offset // Where to point from break } } } labels++ begin = i + 1 } escapedDot = false } // Root label is special if len(bs) == 1 && bs[0] == '.' { return off, labels, nil } // If we did compression and we find something add the pointer here if pointer != -1 { // We have two bytes (14 bits) to put the pointer in // if msg == nil, we will never do compression binary.BigEndian.PutUint16(msg[nameoffset:], uint16(pointer^0xC000)) off = nameoffset + 1 goto End } if msg != nil && off < len(msg) { msg[off] = 0 } End: off++ return off, labels, nil } // Unpack a domain name. // In addition to the simple sequences of counted strings above, // domain names are allowed to refer to strings elsewhere in the // packet, to avoid repeating common suffixes when returning // many entries in a single domain. The pointers are marked // by a length byte with the top two bits set. Ignoring those // two bits, that byte and the next give a 14 bit offset from msg[0] // where we should pick up the trail. // Note that if we jump elsewhere in the packet, // we return off1 == the offset after the first pointer we found, // which is where the next record will start. // In theory, the pointers are only allowed to jump backward. // We let them jump anywhere and stop jumping after a while. // UnpackDomainName unpacks a domain name into a string. func UnpackDomainName(msg []byte, off int) (string, int, error) { s := make([]byte, 0, 64) off1 := 0 lenmsg := len(msg) maxLen := maxDomainNameWireOctets ptr := 0 // number of pointers followed Loop: for { if off >= lenmsg { return "", lenmsg, ErrBuf } c := int(msg[off]) off++ switch c & 0xC0 { case 0x00: if c == 0x00 { // end of name break Loop } // literal string if off+c > lenmsg { return "", lenmsg, ErrBuf } for j := off; j < off+c; j++ { switch b := msg[j]; b { case '.', '(', ')', ';', ' ', '@': fallthrough case '"', '\\': s = append(s, '\\', b) // presentation-format \X escapes add an extra byte maxLen++ default: if b < 32 || b >= 127 { // unprintable, use \DDD var buf [3]byte bufs := strconv.AppendInt(buf[:0], int64(b), 10) s = append(s, '\\') for i := 0; i < 3-len(bufs); i++ { s = append(s, '0') } for _, r := range bufs { s = append(s, r) } // presentation-format \DDD escapes add 3 extra bytes maxLen += 3 } else { s = append(s, b) } } } s = append(s, '.') off += c case 0xC0: // pointer to somewhere else in msg. // remember location after first ptr, // since that's how many bytes we consumed. // also, don't follow too many pointers -- // maybe there's a loop. if off >= lenmsg { return "", lenmsg, ErrBuf } c1 := msg[off] off++ if ptr == 0 { off1 = off } if ptr++; ptr > 10 { return "", lenmsg, &Error{err: "too many compression pointers"} } // pointer should guarantee that it advances and points forwards at least // but the condition on previous three lines guarantees that it's // at least loop-free off = (c^0xC0)<<8 | int(c1) default: // 0x80 and 0x40 are reserved return "", lenmsg, ErrRdata } } if ptr == 0 { off1 = off } if len(s) == 0 { s = []byte(".") } else if len(s) >= maxLen { // error if the name is too long, but don't throw it away return string(s), lenmsg, ErrLongDomain } return string(s), off1, nil } func packTxt(txt []string, msg []byte, offset int, tmp []byte) (int, error) { if len(txt) == 0 { if offset >= len(msg) { return offset, ErrBuf } msg[offset] = 0 return offset, nil } var err error for i := range txt { if len(txt[i]) > len(tmp) { return offset, ErrBuf } offset, err = packTxtString(txt[i], msg, offset, tmp) if err != nil { return offset, err } } return offset, nil } func packTxtString(s string, msg []byte, offset int, tmp []byte) (int, error) { lenByteOffset := offset if offset >= len(msg) || len(s) > len(tmp) { return offset, ErrBuf } offset++ bs := tmp[:len(s)] copy(bs, s) for i := 0; i < len(bs); i++ { if len(msg) <= offset { return offset, ErrBuf } if bs[i] == '\\' { i++ if i == len(bs) { break } // check for \DDD if i+2 < len(bs) && isDigit(bs[i]) && isDigit(bs[i+1]) && isDigit(bs[i+2]) { msg[offset] = dddToByte(bs[i:]) i += 2 } else { msg[offset] = bs[i] } } else { msg[offset] = bs[i] } offset++ } l := offset - lenByteOffset - 1 if l > 255 { return offset, &Error{err: "string exceeded 255 bytes in txt"} } msg[lenByteOffset] = byte(l) return offset, nil } func packOctetString(s string, msg []byte, offset int, tmp []byte) (int, error) { if offset >= len(msg) || len(s) > len(tmp) { return offset, ErrBuf } bs := tmp[:len(s)] copy(bs, s) for i := 0; i < len(bs); i++ { if len(msg) <= offset { return offset, ErrBuf } if bs[i] == '\\' { i++ if i == len(bs) { break } // check for \DDD if i+2 < len(bs) && isDigit(bs[i]) && isDigit(bs[i+1]) && isDigit(bs[i+2]) { msg[offset] = dddToByte(bs[i:]) i += 2 } else { msg[offset] = bs[i] } } else { msg[offset] = bs[i] } offset++ } return offset, nil } func unpackTxt(msg []byte, off0 int) (ss []string, off int, err error) { off = off0 var s string for off < len(msg) && err == nil { s, off, err = unpackTxtString(msg, off) if err == nil { ss = append(ss, s) } } return } func unpackTxtString(msg []byte, offset int) (string, int, error) { if offset+1 > len(msg) { return "", offset, &Error{err: "overflow unpacking txt"} } l := int(msg[offset]) if offset+l+1 > len(msg) { return "", offset, &Error{err: "overflow unpacking txt"} } s := make([]byte, 0, l) for _, b := range msg[offset+1 : offset+1+l] { switch b { case '"', '\\': s = append(s, '\\', b) default: if b < 32 || b > 127 { // unprintable var buf [3]byte bufs := strconv.AppendInt(buf[:0], int64(b), 10) s = append(s, '\\') for i := 0; i < 3-len(bufs); i++ { s = append(s, '0') } for _, r := range bufs { s = append(s, r) } } else { s = append(s, b) } } } offset += 1 + l return string(s), offset, nil } // Helpers for dealing with escaped bytes func isDigit(b byte) bool { return b >= '0' && b <= '9' } func dddToByte(s []byte) byte { return byte((s[0]-'0')*100 + (s[1]-'0')*10 + (s[2] - '0')) } // Helper function for packing and unpacking func intToBytes(i *big.Int, length int) []byte { buf := i.Bytes() if len(buf) < length { b := make([]byte, length) copy(b[length-len(buf):], buf) return b } return buf } // PackRR packs a resource record rr into msg[off:]. // See PackDomainName for documentation about the compression. func PackRR(rr RR, msg []byte, off int, compression map[string]int, compress bool) (off1 int, err error) { if rr == nil { return len(msg), &Error{err: "nil rr"} } off1, err = rr.pack(msg, off, compression, compress) if err != nil { return len(msg), err } // TODO(miek): Not sure if this is needed? If removed we can remove rawmsg.go as well. if rawSetRdlength(msg, off, off1) { return off1, nil } return off, ErrRdata } // UnpackRR unpacks msg[off:] into an RR. func UnpackRR(msg []byte, off int) (rr RR, off1 int, err error) { h, off, msg, err := unpackHeader(msg, off) if err != nil { return nil, len(msg), err } end := off + int(h.Rdlength) if fn, known := typeToUnpack[h.Rrtype]; !known { rr, off, err = unpackRFC3597(h, msg, off) } else { rr, off, err = fn(h, msg, off) } if off != end { return &h, end, &Error{err: "bad rdlength"} } return rr, off, err } // unpackRRslice unpacks msg[off:] into an []RR. // If we cannot unpack the whole array, then it will return nil func unpackRRslice(l int, msg []byte, off int) (dst1 []RR, off1 int, err error) { var r RR // Don't pre-allocate, l may be under attacker control var dst []RR for i := 0; i < l; i++ { off1 := off r, off, err = UnpackRR(msg, off) if err != nil { off = len(msg) break } // If offset does not increase anymore, l is a lie if off1 == off { l = i break } dst = append(dst, r) } if err != nil && off == len(msg) { dst = nil } return dst, off, err } // Convert a MsgHdr to a string, with dig-like headers: // //;; opcode: QUERY, status: NOERROR, id: 48404 // //;; flags: qr aa rd ra; func (h *MsgHdr) String() string { if h == nil { return " MsgHdr" } s := ";; opcode: " + OpcodeToString[h.Opcode] s += ", status: " + RcodeToString[h.Rcode] s += ", id: " + strconv.Itoa(int(h.Id)) + "\n" s += ";; flags:" if h.Response { s += " qr" } if h.Authoritative { s += " aa" } if h.Truncated { s += " tc" } if h.RecursionDesired { s += " rd" } if h.RecursionAvailable { s += " ra" } if h.Zero { // Hmm s += " z" } if h.AuthenticatedData { s += " ad" } if h.CheckingDisabled { s += " cd" } s += ";" return s } // Pack packs a Msg: it is converted to to wire format. // If the dns.Compress is true the message will be in compressed wire format. func (dns *Msg) Pack() (msg []byte, err error) { return dns.PackBuffer(nil) } // PackBuffer packs a Msg, using the given buffer buf. If buf is too small // a new buffer is allocated. func (dns *Msg) PackBuffer(buf []byte) (msg []byte, err error) { // We use a similar function in tsig.go's stripTsig. var ( dh Header compression map[string]int ) if dns.Compress { compression = make(map[string]int) // Compression pointer mappings } if dns.Rcode < 0 || dns.Rcode > 0xFFF { return nil, ErrRcode } if dns.Rcode > 0xF { // Regular RCODE field is 4 bits opt := dns.IsEdns0() if opt == nil { return nil, ErrExtendedRcode } opt.SetExtendedRcode(uint8(dns.Rcode >> 4)) dns.Rcode &= 0xF } // Convert convenient Msg into wire-like Header. dh.Id = dns.Id dh.Bits = uint16(dns.Opcode)<<11 | uint16(dns.Rcode) if dns.Response { dh.Bits |= _QR } if dns.Authoritative { dh.Bits |= _AA } if dns.Truncated { dh.Bits |= _TC } if dns.RecursionDesired { dh.Bits |= _RD } if dns.RecursionAvailable { dh.Bits |= _RA } if dns.Zero { dh.Bits |= _Z } if dns.AuthenticatedData { dh.Bits |= _AD } if dns.CheckingDisabled { dh.Bits |= _CD } // Prepare variable sized arrays. question := dns.Question answer := dns.Answer ns := dns.Ns extra := dns.Extra dh.Qdcount = uint16(len(question)) dh.Ancount = uint16(len(answer)) dh.Nscount = uint16(len(ns)) dh.Arcount = uint16(len(extra)) // We need the uncompressed length here, because we first pack it and then compress it. msg = buf uncompressedLen := compressedLen(dns, false) if packLen := uncompressedLen + 1; len(msg) < packLen { msg = make([]byte, packLen) } // Pack it in: header and then the pieces. off := 0 off, err = dh.pack(msg, off, compression, dns.Compress) if err != nil { return nil, err } for i := 0; i < len(question); i++ { off, err = question[i].pack(msg, off, compression, dns.Compress) if err != nil { return nil, err } } for i := 0; i < len(answer); i++ { off, err = PackRR(answer[i], msg, off, compression, dns.Compress) if err != nil { return nil, err } } for i := 0; i < len(ns); i++ { off, err = PackRR(ns[i], msg, off, compression, dns.Compress) if err != nil { return nil, err } } for i := 0; i < len(extra); i++ { off, err = PackRR(extra[i], msg, off, compression, dns.Compress) if err != nil { return nil, err } } return msg[:off], nil } // Unpack unpacks a binary message to a Msg structure. func (dns *Msg) Unpack(msg []byte) (err error) { var ( dh Header off int ) if dh, off, err = unpackMsgHdr(msg, off); err != nil { return err } dns.Id = dh.Id dns.Response = (dh.Bits & _QR) != 0 dns.Opcode = int(dh.Bits>>11) & 0xF dns.Authoritative = (dh.Bits & _AA) != 0 dns.Truncated = (dh.Bits & _TC) != 0 dns.RecursionDesired = (dh.Bits & _RD) != 0 dns.RecursionAvailable = (dh.Bits & _RA) != 0 dns.Zero = (dh.Bits & _Z) != 0 dns.AuthenticatedData = (dh.Bits & _AD) != 0 dns.CheckingDisabled = (dh.Bits & _CD) != 0 dns.Rcode = int(dh.Bits & 0xF) // If we are at the end of the message we should return *just* the // header. This can still be useful to the caller. 9.9.9.9 sends these // when responding with REFUSED for instance. if off == len(msg) { // reset sections before returning dns.Question, dns.Answer, dns.Ns, dns.Extra = nil, nil, nil, nil return nil } // Qdcount, Ancount, Nscount, Arcount can't be trusted, as they are // attacker controlled. This means we can't use them to pre-allocate // slices. dns.Question = nil for i := 0; i < int(dh.Qdcount); i++ { off1 := off var q Question q, off, err = unpackQuestion(msg, off) if err != nil { // Even if Truncated is set, we only will set ErrTruncated if we // actually got the questions return err } if off1 == off { // Offset does not increase anymore, dh.Qdcount is a lie! dh.Qdcount = uint16(i) break } dns.Question = append(dns.Question, q) } dns.Answer, off, err = unpackRRslice(int(dh.Ancount), msg, off) // The header counts might have been wrong so we need to update it dh.Ancount = uint16(len(dns.Answer)) if err == nil { dns.Ns, off, err = unpackRRslice(int(dh.Nscount), msg, off) } // The header counts might have been wrong so we need to update it dh.Nscount = uint16(len(dns.Ns)) if err == nil { dns.Extra, off, err = unpackRRslice(int(dh.Arcount), msg, off) } // The header counts might have been wrong so we need to update it dh.Arcount = uint16(len(dns.Extra)) if off != len(msg) { // TODO(miek) make this an error? // use PackOpt to let people tell how detailed the error reporting should be? // println("dns: extra bytes in dns packet", off, "<", len(msg)) } else if dns.Truncated { // Whether we ran into a an error or not, we want to return that it // was truncated err = ErrTruncated } return err } // Convert a complete message to a string with dig-like output. func (dns *Msg) String() string { if dns == nil { return " MsgHdr" } s := dns.MsgHdr.String() + " " s += "QUERY: " + strconv.Itoa(len(dns.Question)) + ", " s += "ANSWER: " + strconv.Itoa(len(dns.Answer)) + ", " s += "AUTHORITY: " + strconv.Itoa(len(dns.Ns)) + ", " s += "ADDITIONAL: " + strconv.Itoa(len(dns.Extra)) + "\n" if len(dns.Question) > 0 { s += "\n;; QUESTION SECTION:\n" for i := 0; i < len(dns.Question); i++ { s += dns.Question[i].String() + "\n" } } if len(dns.Answer) > 0 { s += "\n;; ANSWER SECTION:\n" for i := 0; i < len(dns.Answer); i++ { if dns.Answer[i] != nil { s += dns.Answer[i].String() + "\n" } } } if len(dns.Ns) > 0 { s += "\n;; AUTHORITY SECTION:\n" for i := 0; i < len(dns.Ns); i++ { if dns.Ns[i] != nil { s += dns.Ns[i].String() + "\n" } } } if len(dns.Extra) > 0 { s += "\n;; ADDITIONAL SECTION:\n" for i := 0; i < len(dns.Extra); i++ { if dns.Extra[i] != nil { s += dns.Extra[i].String() + "\n" } } } return s } // Len returns the message length when in (un)compressed wire format. // If dns.Compress is true compression it is taken into account. Len() // is provided to be a faster way to get the size of the resulting packet, // than packing it, measuring the size and discarding the buffer. func (dns *Msg) Len() int { return compressedLen(dns, dns.Compress) } // compressedLen returns the message length when in compressed wire format // when compress is true, otherwise the uncompressed length is returned. func compressedLen(dns *Msg, compress bool) int { // We always return one more than needed. l := 12 // Message header is always 12 bytes if compress { compression := map[string]int{} for _, r := range dns.Question { l += r.len() compressionLenHelper(compression, r.Name) } l += compressionLenSlice(compression, dns.Answer) l += compressionLenSlice(compression, dns.Ns) l += compressionLenSlice(compression, dns.Extra) } else { for _, r := range dns.Question { l += r.len() } for _, r := range dns.Answer { if r != nil { l += r.len() } } for _, r := range dns.Ns { if r != nil { l += r.len() } } for _, r := range dns.Extra { if r != nil { l += r.len() } } } return l } func compressionLenSlice(c map[string]int, rs []RR) int { var l int for _, r := range rs { if r == nil { continue } l += r.len() k, ok := compressionLenSearch(c, r.Header().Name) if ok { l += 1 - k } compressionLenHelper(c, r.Header().Name) k, ok = compressionLenSearchType(c, r) if ok { l += 1 - k } compressionLenHelperType(c, r) } return l } // Put the parts of the name in the compression map. func compressionLenHelper(c map[string]int, s string) { pref := "" lbs := Split(s) for j := len(lbs) - 1; j >= 0; j-- { pref = s[lbs[j]:] if _, ok := c[pref]; !ok { c[pref] = len(pref) } } } // Look for each part in the compression map and returns its length, // keep on searching so we get the longest match. func compressionLenSearch(c map[string]int, s string) (int, bool) { off := 0 end := false if s == "" { // don't bork on bogus data return 0, false } for { if _, ok := c[s[off:]]; ok { return len(s[off:]), true } if end { break } off, end = NextLabel(s, off) } return 0, false } // Copy returns a new RR which is a deep-copy of r. func Copy(r RR) RR { r1 := r.copy(); return r1 } // Len returns the length (in octets) of the uncompressed RR in wire format. func Len(r RR) int { return r.len() } // Copy returns a new *Msg which is a deep-copy of dns. func (dns *Msg) Copy() *Msg { return dns.CopyTo(new(Msg)) } // CopyTo copies the contents to the provided message using a deep-copy and returns the copy. func (dns *Msg) CopyTo(r1 *Msg) *Msg { r1.MsgHdr = dns.MsgHdr r1.Compress = dns.Compress if len(dns.Question) > 0 { r1.Question = make([]Question, len(dns.Question)) copy(r1.Question, dns.Question) // TODO(miek): Question is an immutable value, ok to do a shallow-copy } rrArr := make([]RR, len(dns.Answer)+len(dns.Ns)+len(dns.Extra)) var rri int if len(dns.Answer) > 0 { rrbegin := rri for i := 0; i < len(dns.Answer); i++ { rrArr[rri] = dns.Answer[i].copy() rri++ } r1.Answer = rrArr[rrbegin:rri:rri] } if len(dns.Ns) > 0 { rrbegin := rri for i := 0; i < len(dns.Ns); i++ { rrArr[rri] = dns.Ns[i].copy() rri++ } r1.Ns = rrArr[rrbegin:rri:rri] } if len(dns.Extra) > 0 { rrbegin := rri for i := 0; i < len(dns.Extra); i++ { rrArr[rri] = dns.Extra[i].copy() rri++ } r1.Extra = rrArr[rrbegin:rri:rri] } return r1 } func (q *Question) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := PackDomainName(q.Name, msg, off, compression, compress) if err != nil { return off, err } off, err = packUint16(q.Qtype, msg, off) if err != nil { return off, err } off, err = packUint16(q.Qclass, msg, off) if err != nil { return off, err } return off, nil } func unpackQuestion(msg []byte, off int) (Question, int, error) { var ( q Question err error ) q.Name, off, err = UnpackDomainName(msg, off) if err != nil { return q, off, err } if off == len(msg) { return q, off, nil } q.Qtype, off, err = unpackUint16(msg, off) if err != nil { return q, off, err } if off == len(msg) { return q, off, nil } q.Qclass, off, err = unpackUint16(msg, off) if off == len(msg) { return q, off, nil } return q, off, err } func (dh *Header) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := packUint16(dh.Id, msg, off) if err != nil { return off, err } off, err = packUint16(dh.Bits, msg, off) if err != nil { return off, err } off, err = packUint16(dh.Qdcount, msg, off) if err != nil { return off, err } off, err = packUint16(dh.Ancount, msg, off) if err != nil { return off, err } off, err = packUint16(dh.Nscount, msg, off) if err != nil { return off, err } off, err = packUint16(dh.Arcount, msg, off) return off, err } func unpackMsgHdr(msg []byte, off int) (Header, int, error) { var ( dh Header err error ) dh.Id, off, err = unpackUint16(msg, off) if err != nil { return dh, off, err } dh.Bits, off, err = unpackUint16(msg, off) if err != nil { return dh, off, err } dh.Qdcount, off, err = unpackUint16(msg, off) if err != nil { return dh, off, err } dh.Ancount, off, err = unpackUint16(msg, off) if err != nil { return dh, off, err } dh.Nscount, off, err = unpackUint16(msg, off) if err != nil { return dh, off, err } dh.Arcount, off, err = unpackUint16(msg, off) return dh, off, err } golang-github-miekg-dns-1.0.4+ds/msg_generate.go000066400000000000000000000240711325625637500215320ustar00rootroot00000000000000//+build ignore // msg_generate.go is meant to run with go generate. It will use // go/{importer,types} to track down all the RR struct types. Then for each type // it will generate pack/unpack methods based on the struct tags. The generated source is // written to zmsg.go, and is meant to be checked into git. package main import ( "bytes" "fmt" "go/format" "go/importer" "go/types" "log" "os" "strings" ) var packageHdr = ` // Code generated by "go run msg_generate.go"; DO NOT EDIT. package dns ` // getTypeStruct will take a type and the package scope, and return the // (innermost) struct if the type is considered a RR type (currently defined as // those structs beginning with a RR_Header, could be redefined as implementing // the RR interface). The bool return value indicates if embedded structs were // resolved. func getTypeStruct(t types.Type, scope *types.Scope) (*types.Struct, bool) { st, ok := t.Underlying().(*types.Struct) if !ok { return nil, false } if st.Field(0).Type() == scope.Lookup("RR_Header").Type() { return st, false } if st.Field(0).Anonymous() { st, _ := getTypeStruct(st.Field(0).Type(), scope) return st, true } return nil, false } func main() { // Import and type-check the package pkg, err := importer.Default().Import("github.com/miekg/dns") fatalIfErr(err) scope := pkg.Scope() // Collect actual types (*X) var namedTypes []string for _, name := range scope.Names() { o := scope.Lookup(name) if o == nil || !o.Exported() { continue } if st, _ := getTypeStruct(o.Type(), scope); st == nil { continue } if name == "PrivateRR" { continue } // Check if corresponding TypeX exists if scope.Lookup("Type"+o.Name()) == nil && o.Name() != "RFC3597" { log.Fatalf("Constant Type%s does not exist.", o.Name()) } namedTypes = append(namedTypes, o.Name()) } b := &bytes.Buffer{} b.WriteString(packageHdr) fmt.Fprint(b, "// pack*() functions\n\n") for _, name := range namedTypes { o := scope.Lookup(name) st, _ := getTypeStruct(o.Type(), scope) fmt.Fprintf(b, "func (rr *%s) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {\n", name) fmt.Fprint(b, `off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off `) for i := 1; i < st.NumFields(); i++ { o := func(s string) { fmt.Fprintf(b, s, st.Field(i).Name()) fmt.Fprint(b, `if err != nil { return off, err } `) } if _, ok := st.Field(i).Type().(*types.Slice); ok { switch st.Tag(i) { case `dns:"-"`: // ignored case `dns:"txt"`: o("off, err = packStringTxt(rr.%s, msg, off)\n") case `dns:"opt"`: o("off, err = packDataOpt(rr.%s, msg, off)\n") case `dns:"nsec"`: o("off, err = packDataNsec(rr.%s, msg, off)\n") case `dns:"domain-name"`: o("off, err = packDataDomainNames(rr.%s, msg, off, compression, compress)\n") default: log.Fatalln(name, st.Field(i).Name(), st.Tag(i)) } continue } switch { case st.Tag(i) == `dns:"-"`: // ignored case st.Tag(i) == `dns:"cdomain-name"`: o("off, err = PackDomainName(rr.%s, msg, off, compression, compress)\n") case st.Tag(i) == `dns:"domain-name"`: o("off, err = PackDomainName(rr.%s, msg, off, compression, false)\n") case st.Tag(i) == `dns:"a"`: o("off, err = packDataA(rr.%s, msg, off)\n") case st.Tag(i) == `dns:"aaaa"`: o("off, err = packDataAAAA(rr.%s, msg, off)\n") case st.Tag(i) == `dns:"uint48"`: o("off, err = packUint48(rr.%s, msg, off)\n") case st.Tag(i) == `dns:"txt"`: o("off, err = packString(rr.%s, msg, off)\n") case strings.HasPrefix(st.Tag(i), `dns:"size-base32`): // size-base32 can be packed just like base32 fallthrough case st.Tag(i) == `dns:"base32"`: o("off, err = packStringBase32(rr.%s, msg, off)\n") case strings.HasPrefix(st.Tag(i), `dns:"size-base64`): // size-base64 can be packed just like base64 fallthrough case st.Tag(i) == `dns:"base64"`: o("off, err = packStringBase64(rr.%s, msg, off)\n") case strings.HasPrefix(st.Tag(i), `dns:"size-hex:SaltLength`): // directly write instead of using o() so we get the error check in the correct place field := st.Field(i).Name() fmt.Fprintf(b, `// Only pack salt if value is not "-", i.e. empty if rr.%s != "-" { off, err = packStringHex(rr.%s, msg, off) if err != nil { return off, err } } `, field, field) continue case strings.HasPrefix(st.Tag(i), `dns:"size-hex`): // size-hex can be packed just like hex fallthrough case st.Tag(i) == `dns:"hex"`: o("off, err = packStringHex(rr.%s, msg, off)\n") case st.Tag(i) == `dns:"octet"`: o("off, err = packStringOctet(rr.%s, msg, off)\n") case st.Tag(i) == "": switch st.Field(i).Type().(*types.Basic).Kind() { case types.Uint8: o("off, err = packUint8(rr.%s, msg, off)\n") case types.Uint16: o("off, err = packUint16(rr.%s, msg, off)\n") case types.Uint32: o("off, err = packUint32(rr.%s, msg, off)\n") case types.Uint64: o("off, err = packUint64(rr.%s, msg, off)\n") case types.String: o("off, err = packString(rr.%s, msg, off)\n") default: log.Fatalln(name, st.Field(i).Name()) } default: log.Fatalln(name, st.Field(i).Name(), st.Tag(i)) } } // We have packed everything, only now we know the rdlength of this RR fmt.Fprintln(b, "rr.Header().Rdlength = uint16(off-headerEnd)") fmt.Fprintln(b, "return off, nil }\n") } fmt.Fprint(b, "// unpack*() functions\n\n") for _, name := range namedTypes { o := scope.Lookup(name) st, _ := getTypeStruct(o.Type(), scope) fmt.Fprintf(b, "func unpack%s(h RR_Header, msg []byte, off int) (RR, int, error) {\n", name) fmt.Fprintf(b, "rr := new(%s)\n", name) fmt.Fprint(b, "rr.Hdr = h\n") fmt.Fprint(b, `if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart `) for i := 1; i < st.NumFields(); i++ { o := func(s string) { fmt.Fprintf(b, s, st.Field(i).Name()) fmt.Fprint(b, `if err != nil { return rr, off, err } `) } // size-* are special, because they reference a struct member we should use for the length. if strings.HasPrefix(st.Tag(i), `dns:"size-`) { structMember := structMember(st.Tag(i)) structTag := structTag(st.Tag(i)) switch structTag { case "hex": fmt.Fprintf(b, "rr.%s, off, err = unpackStringHex(msg, off, off + int(rr.%s))\n", st.Field(i).Name(), structMember) case "base32": fmt.Fprintf(b, "rr.%s, off, err = unpackStringBase32(msg, off, off + int(rr.%s))\n", st.Field(i).Name(), structMember) case "base64": fmt.Fprintf(b, "rr.%s, off, err = unpackStringBase64(msg, off, off + int(rr.%s))\n", st.Field(i).Name(), structMember) default: log.Fatalln(name, st.Field(i).Name(), st.Tag(i)) } fmt.Fprint(b, `if err != nil { return rr, off, err } `) continue } if _, ok := st.Field(i).Type().(*types.Slice); ok { switch st.Tag(i) { case `dns:"-"`: // ignored case `dns:"txt"`: o("rr.%s, off, err = unpackStringTxt(msg, off)\n") case `dns:"opt"`: o("rr.%s, off, err = unpackDataOpt(msg, off)\n") case `dns:"nsec"`: o("rr.%s, off, err = unpackDataNsec(msg, off)\n") case `dns:"domain-name"`: o("rr.%s, off, err = unpackDataDomainNames(msg, off, rdStart + int(rr.Hdr.Rdlength))\n") default: log.Fatalln(name, st.Field(i).Name(), st.Tag(i)) } continue } switch st.Tag(i) { case `dns:"-"`: // ignored case `dns:"cdomain-name"`: fallthrough case `dns:"domain-name"`: o("rr.%s, off, err = UnpackDomainName(msg, off)\n") case `dns:"a"`: o("rr.%s, off, err = unpackDataA(msg, off)\n") case `dns:"aaaa"`: o("rr.%s, off, err = unpackDataAAAA(msg, off)\n") case `dns:"uint48"`: o("rr.%s, off, err = unpackUint48(msg, off)\n") case `dns:"txt"`: o("rr.%s, off, err = unpackString(msg, off)\n") case `dns:"base32"`: o("rr.%s, off, err = unpackStringBase32(msg, off, rdStart + int(rr.Hdr.Rdlength))\n") case `dns:"base64"`: o("rr.%s, off, err = unpackStringBase64(msg, off, rdStart + int(rr.Hdr.Rdlength))\n") case `dns:"hex"`: o("rr.%s, off, err = unpackStringHex(msg, off, rdStart + int(rr.Hdr.Rdlength))\n") case `dns:"octet"`: o("rr.%s, off, err = unpackStringOctet(msg, off)\n") case "": switch st.Field(i).Type().(*types.Basic).Kind() { case types.Uint8: o("rr.%s, off, err = unpackUint8(msg, off)\n") case types.Uint16: o("rr.%s, off, err = unpackUint16(msg, off)\n") case types.Uint32: o("rr.%s, off, err = unpackUint32(msg, off)\n") case types.Uint64: o("rr.%s, off, err = unpackUint64(msg, off)\n") case types.String: o("rr.%s, off, err = unpackString(msg, off)\n") default: log.Fatalln(name, st.Field(i).Name()) } default: log.Fatalln(name, st.Field(i).Name(), st.Tag(i)) } // If we've hit len(msg) we return without error. if i < st.NumFields()-1 { fmt.Fprintf(b, `if off == len(msg) { return rr, off, nil } `) } } fmt.Fprintf(b, "return rr, off, err }\n\n") } // Generate typeToUnpack map fmt.Fprintln(b, "var typeToUnpack = map[uint16]func(RR_Header, []byte, int) (RR, int, error){") for _, name := range namedTypes { if name == "RFC3597" { continue } fmt.Fprintf(b, "Type%s: unpack%s,\n", name, name) } fmt.Fprintln(b, "}\n") // gofmt res, err := format.Source(b.Bytes()) if err != nil { b.WriteTo(os.Stderr) log.Fatal(err) } // write result f, err := os.Create("zmsg.go") fatalIfErr(err) defer f.Close() f.Write(res) } // structMember will take a tag like dns:"size-base32:SaltLength" and return the last part of this string. func structMember(s string) string { fields := strings.Split(s, ":") if len(fields) == 0 { return "" } f := fields[len(fields)-1] // f should have a closing " if len(f) > 1 { return f[:len(f)-1] } return f } // structTag will take a tag like dns:"size-base32:SaltLength" and return base32. func structTag(s string) string { fields := strings.Split(s, ":") if len(fields) < 2 { return "" } return fields[1][len("\"size-"):] } func fatalIfErr(err error) { if err != nil { log.Fatal(err) } } golang-github-miekg-dns-1.0.4+ds/msg_helpers.go000066400000000000000000000412021325625637500213750ustar00rootroot00000000000000package dns import ( "encoding/base32" "encoding/base64" "encoding/binary" "encoding/hex" "net" "strconv" ) // helper functions called from the generated zmsg.go // These function are named after the tag to help pack/unpack, if there is no tag it is the name // of the type they pack/unpack (string, int, etc). We prefix all with unpackData or packData, so packDataA or // packDataDomainName. func unpackDataA(msg []byte, off int) (net.IP, int, error) { if off+net.IPv4len > len(msg) { return nil, len(msg), &Error{err: "overflow unpacking a"} } a := append(make(net.IP, 0, net.IPv4len), msg[off:off+net.IPv4len]...) off += net.IPv4len return a, off, nil } func packDataA(a net.IP, msg []byte, off int) (int, error) { // It must be a slice of 4, even if it is 16, we encode only the first 4 if off+net.IPv4len > len(msg) { return len(msg), &Error{err: "overflow packing a"} } switch len(a) { case net.IPv4len, net.IPv6len: copy(msg[off:], a.To4()) off += net.IPv4len case 0: // Allowed, for dynamic updates. default: return len(msg), &Error{err: "overflow packing a"} } return off, nil } func unpackDataAAAA(msg []byte, off int) (net.IP, int, error) { if off+net.IPv6len > len(msg) { return nil, len(msg), &Error{err: "overflow unpacking aaaa"} } aaaa := append(make(net.IP, 0, net.IPv6len), msg[off:off+net.IPv6len]...) off += net.IPv6len return aaaa, off, nil } func packDataAAAA(aaaa net.IP, msg []byte, off int) (int, error) { if off+net.IPv6len > len(msg) { return len(msg), &Error{err: "overflow packing aaaa"} } switch len(aaaa) { case net.IPv6len: copy(msg[off:], aaaa) off += net.IPv6len case 0: // Allowed, dynamic updates. default: return len(msg), &Error{err: "overflow packing aaaa"} } return off, nil } // unpackHeader unpacks an RR header, returning the offset to the end of the header and a // re-sliced msg according to the expected length of the RR. func unpackHeader(msg []byte, off int) (rr RR_Header, off1 int, truncmsg []byte, err error) { hdr := RR_Header{} if off == len(msg) { return hdr, off, msg, nil } hdr.Name, off, err = UnpackDomainName(msg, off) if err != nil { return hdr, len(msg), msg, err } hdr.Rrtype, off, err = unpackUint16(msg, off) if err != nil { return hdr, len(msg), msg, err } hdr.Class, off, err = unpackUint16(msg, off) if err != nil { return hdr, len(msg), msg, err } hdr.Ttl, off, err = unpackUint32(msg, off) if err != nil { return hdr, len(msg), msg, err } hdr.Rdlength, off, err = unpackUint16(msg, off) if err != nil { return hdr, len(msg), msg, err } msg, err = truncateMsgFromRdlength(msg, off, hdr.Rdlength) return hdr, off, msg, err } // pack packs an RR header, returning the offset to the end of the header. // See PackDomainName for documentation about the compression. func (hdr RR_Header) pack(msg []byte, off int, compression map[string]int, compress bool) (off1 int, err error) { if off == len(msg) { return off, nil } off, err = PackDomainName(hdr.Name, msg, off, compression, compress) if err != nil { return len(msg), err } off, err = packUint16(hdr.Rrtype, msg, off) if err != nil { return len(msg), err } off, err = packUint16(hdr.Class, msg, off) if err != nil { return len(msg), err } off, err = packUint32(hdr.Ttl, msg, off) if err != nil { return len(msg), err } off, err = packUint16(hdr.Rdlength, msg, off) if err != nil { return len(msg), err } return off, nil } // helper helper functions. // truncateMsgFromRdLength truncates msg to match the expected length of the RR. // Returns an error if msg is smaller than the expected size. func truncateMsgFromRdlength(msg []byte, off int, rdlength uint16) (truncmsg []byte, err error) { lenrd := off + int(rdlength) if lenrd > len(msg) { return msg, &Error{err: "overflowing header size"} } return msg[:lenrd], nil } func fromBase32(s []byte) (buf []byte, err error) { for i, b := range s { if b >= 'a' && b <= 'z' { s[i] = b - 32 } } buflen := base32.HexEncoding.DecodedLen(len(s)) buf = make([]byte, buflen) n, err := base32.HexEncoding.Decode(buf, s) buf = buf[:n] return } func toBase32(b []byte) string { return base32.HexEncoding.EncodeToString(b) } func fromBase64(s []byte) (buf []byte, err error) { buflen := base64.StdEncoding.DecodedLen(len(s)) buf = make([]byte, buflen) n, err := base64.StdEncoding.Decode(buf, s) buf = buf[:n] return } func toBase64(b []byte) string { return base64.StdEncoding.EncodeToString(b) } // dynamicUpdate returns true if the Rdlength is zero. func noRdata(h RR_Header) bool { return h.Rdlength == 0 } func unpackUint8(msg []byte, off int) (i uint8, off1 int, err error) { if off+1 > len(msg) { return 0, len(msg), &Error{err: "overflow unpacking uint8"} } return uint8(msg[off]), off + 1, nil } func packUint8(i uint8, msg []byte, off int) (off1 int, err error) { if off+1 > len(msg) { return len(msg), &Error{err: "overflow packing uint8"} } msg[off] = byte(i) return off + 1, nil } func unpackUint16(msg []byte, off int) (i uint16, off1 int, err error) { if off+2 > len(msg) { return 0, len(msg), &Error{err: "overflow unpacking uint16"} } return binary.BigEndian.Uint16(msg[off:]), off + 2, nil } func packUint16(i uint16, msg []byte, off int) (off1 int, err error) { if off+2 > len(msg) { return len(msg), &Error{err: "overflow packing uint16"} } binary.BigEndian.PutUint16(msg[off:], i) return off + 2, nil } func unpackUint32(msg []byte, off int) (i uint32, off1 int, err error) { if off+4 > len(msg) { return 0, len(msg), &Error{err: "overflow unpacking uint32"} } return binary.BigEndian.Uint32(msg[off:]), off + 4, nil } func packUint32(i uint32, msg []byte, off int) (off1 int, err error) { if off+4 > len(msg) { return len(msg), &Error{err: "overflow packing uint32"} } binary.BigEndian.PutUint32(msg[off:], i) return off + 4, nil } func unpackUint48(msg []byte, off int) (i uint64, off1 int, err error) { if off+6 > len(msg) { return 0, len(msg), &Error{err: "overflow unpacking uint64 as uint48"} } // Used in TSIG where the last 48 bits are occupied, so for now, assume a uint48 (6 bytes) i = (uint64(uint64(msg[off])<<40 | uint64(msg[off+1])<<32 | uint64(msg[off+2])<<24 | uint64(msg[off+3])<<16 | uint64(msg[off+4])<<8 | uint64(msg[off+5]))) off += 6 return i, off, nil } func packUint48(i uint64, msg []byte, off int) (off1 int, err error) { if off+6 > len(msg) { return len(msg), &Error{err: "overflow packing uint64 as uint48"} } msg[off] = byte(i >> 40) msg[off+1] = byte(i >> 32) msg[off+2] = byte(i >> 24) msg[off+3] = byte(i >> 16) msg[off+4] = byte(i >> 8) msg[off+5] = byte(i) off += 6 return off, nil } func unpackUint64(msg []byte, off int) (i uint64, off1 int, err error) { if off+8 > len(msg) { return 0, len(msg), &Error{err: "overflow unpacking uint64"} } return binary.BigEndian.Uint64(msg[off:]), off + 8, nil } func packUint64(i uint64, msg []byte, off int) (off1 int, err error) { if off+8 > len(msg) { return len(msg), &Error{err: "overflow packing uint64"} } binary.BigEndian.PutUint64(msg[off:], i) off += 8 return off, nil } func unpackString(msg []byte, off int) (string, int, error) { if off+1 > len(msg) { return "", off, &Error{err: "overflow unpacking txt"} } l := int(msg[off]) if off+l+1 > len(msg) { return "", off, &Error{err: "overflow unpacking txt"} } s := make([]byte, 0, l) for _, b := range msg[off+1 : off+1+l] { switch b { case '"', '\\': s = append(s, '\\', b) default: if b < 32 || b > 127 { // unprintable var buf [3]byte bufs := strconv.AppendInt(buf[:0], int64(b), 10) s = append(s, '\\') for i := 0; i < 3-len(bufs); i++ { s = append(s, '0') } for _, r := range bufs { s = append(s, r) } } else { s = append(s, b) } } } off += 1 + l return string(s), off, nil } func packString(s string, msg []byte, off int) (int, error) { txtTmp := make([]byte, 256*4+1) off, err := packTxtString(s, msg, off, txtTmp) if err != nil { return len(msg), err } return off, nil } func unpackStringBase32(msg []byte, off, end int) (string, int, error) { if end > len(msg) { return "", len(msg), &Error{err: "overflow unpacking base32"} } s := toBase32(msg[off:end]) return s, end, nil } func packStringBase32(s string, msg []byte, off int) (int, error) { b32, err := fromBase32([]byte(s)) if err != nil { return len(msg), err } if off+len(b32) > len(msg) { return len(msg), &Error{err: "overflow packing base32"} } copy(msg[off:off+len(b32)], b32) off += len(b32) return off, nil } func unpackStringBase64(msg []byte, off, end int) (string, int, error) { // Rest of the RR is base64 encoded value, so we don't need an explicit length // to be set. Thus far all RR's that have base64 encoded fields have those as their // last one. What we do need is the end of the RR! if end > len(msg) { return "", len(msg), &Error{err: "overflow unpacking base64"} } s := toBase64(msg[off:end]) return s, end, nil } func packStringBase64(s string, msg []byte, off int) (int, error) { b64, err := fromBase64([]byte(s)) if err != nil { return len(msg), err } if off+len(b64) > len(msg) { return len(msg), &Error{err: "overflow packing base64"} } copy(msg[off:off+len(b64)], b64) off += len(b64) return off, nil } func unpackStringHex(msg []byte, off, end int) (string, int, error) { // Rest of the RR is hex encoded value, so we don't need an explicit length // to be set. NSEC and TSIG have hex fields with a length field. // What we do need is the end of the RR! if end > len(msg) { return "", len(msg), &Error{err: "overflow unpacking hex"} } s := hex.EncodeToString(msg[off:end]) return s, end, nil } func packStringHex(s string, msg []byte, off int) (int, error) { h, err := hex.DecodeString(s) if err != nil { return len(msg), err } if off+(len(h)) > len(msg) { return len(msg), &Error{err: "overflow packing hex"} } copy(msg[off:off+len(h)], h) off += len(h) return off, nil } func unpackStringTxt(msg []byte, off int) ([]string, int, error) { txt, off, err := unpackTxt(msg, off) if err != nil { return nil, len(msg), err } return txt, off, nil } func packStringTxt(s []string, msg []byte, off int) (int, error) { txtTmp := make([]byte, 256*4+1) // If the whole string consists out of \DDD we need this many. off, err := packTxt(s, msg, off, txtTmp) if err != nil { return len(msg), err } return off, nil } func unpackDataOpt(msg []byte, off int) ([]EDNS0, int, error) { var edns []EDNS0 Option: code := uint16(0) if off+4 > len(msg) { return nil, len(msg), &Error{err: "overflow unpacking opt"} } code = binary.BigEndian.Uint16(msg[off:]) off += 2 optlen := binary.BigEndian.Uint16(msg[off:]) off += 2 if off+int(optlen) > len(msg) { return nil, len(msg), &Error{err: "overflow unpacking opt"} } switch code { case EDNS0NSID: e := new(EDNS0_NSID) if err := e.unpack(msg[off : off+int(optlen)]); err != nil { return nil, len(msg), err } edns = append(edns, e) off += int(optlen) case EDNS0SUBNET: e := new(EDNS0_SUBNET) if err := e.unpack(msg[off : off+int(optlen)]); err != nil { return nil, len(msg), err } edns = append(edns, e) off += int(optlen) case EDNS0COOKIE: e := new(EDNS0_COOKIE) if err := e.unpack(msg[off : off+int(optlen)]); err != nil { return nil, len(msg), err } edns = append(edns, e) off += int(optlen) case EDNS0UL: e := new(EDNS0_UL) if err := e.unpack(msg[off : off+int(optlen)]); err != nil { return nil, len(msg), err } edns = append(edns, e) off += int(optlen) case EDNS0LLQ: e := new(EDNS0_LLQ) if err := e.unpack(msg[off : off+int(optlen)]); err != nil { return nil, len(msg), err } edns = append(edns, e) off += int(optlen) case EDNS0DAU: e := new(EDNS0_DAU) if err := e.unpack(msg[off : off+int(optlen)]); err != nil { return nil, len(msg), err } edns = append(edns, e) off += int(optlen) case EDNS0DHU: e := new(EDNS0_DHU) if err := e.unpack(msg[off : off+int(optlen)]); err != nil { return nil, len(msg), err } edns = append(edns, e) off += int(optlen) case EDNS0N3U: e := new(EDNS0_N3U) if err := e.unpack(msg[off : off+int(optlen)]); err != nil { return nil, len(msg), err } edns = append(edns, e) off += int(optlen) case EDNS0PADDING: e := new(EDNS0_PADDING) if err := e.unpack(msg[off : off+int(optlen)]); err != nil { return nil, len(msg), err } edns = append(edns, e) off += int(optlen) default: e := new(EDNS0_LOCAL) e.Code = code if err := e.unpack(msg[off : off+int(optlen)]); err != nil { return nil, len(msg), err } edns = append(edns, e) off += int(optlen) } if off < len(msg) { goto Option } return edns, off, nil } func packDataOpt(options []EDNS0, msg []byte, off int) (int, error) { for _, el := range options { b, err := el.pack() if err != nil || off+3 > len(msg) { return len(msg), &Error{err: "overflow packing opt"} } binary.BigEndian.PutUint16(msg[off:], el.Option()) // Option code binary.BigEndian.PutUint16(msg[off+2:], uint16(len(b))) // Length off += 4 if off+len(b) > len(msg) { copy(msg[off:], b) off = len(msg) continue } // Actual data copy(msg[off:off+len(b)], b) off += len(b) } return off, nil } func unpackStringOctet(msg []byte, off int) (string, int, error) { s := string(msg[off:]) return s, len(msg), nil } func packStringOctet(s string, msg []byte, off int) (int, error) { txtTmp := make([]byte, 256*4+1) off, err := packOctetString(s, msg, off, txtTmp) if err != nil { return len(msg), err } return off, nil } func unpackDataNsec(msg []byte, off int) ([]uint16, int, error) { var nsec []uint16 length, window, lastwindow := 0, 0, -1 for off < len(msg) { if off+2 > len(msg) { return nsec, len(msg), &Error{err: "overflow unpacking nsecx"} } window = int(msg[off]) length = int(msg[off+1]) off += 2 if window <= lastwindow { // RFC 4034: Blocks are present in the NSEC RR RDATA in // increasing numerical order. return nsec, len(msg), &Error{err: "out of order NSEC block"} } if length == 0 { // RFC 4034: Blocks with no types present MUST NOT be included. return nsec, len(msg), &Error{err: "empty NSEC block"} } if length > 32 { return nsec, len(msg), &Error{err: "NSEC block too long"} } if off+length > len(msg) { return nsec, len(msg), &Error{err: "overflowing NSEC block"} } // Walk the bytes in the window and extract the type bits for j := 0; j < length; j++ { b := msg[off+j] // Check the bits one by one, and set the type if b&0x80 == 0x80 { nsec = append(nsec, uint16(window*256+j*8+0)) } if b&0x40 == 0x40 { nsec = append(nsec, uint16(window*256+j*8+1)) } if b&0x20 == 0x20 { nsec = append(nsec, uint16(window*256+j*8+2)) } if b&0x10 == 0x10 { nsec = append(nsec, uint16(window*256+j*8+3)) } if b&0x8 == 0x8 { nsec = append(nsec, uint16(window*256+j*8+4)) } if b&0x4 == 0x4 { nsec = append(nsec, uint16(window*256+j*8+5)) } if b&0x2 == 0x2 { nsec = append(nsec, uint16(window*256+j*8+6)) } if b&0x1 == 0x1 { nsec = append(nsec, uint16(window*256+j*8+7)) } } off += length lastwindow = window } return nsec, off, nil } func packDataNsec(bitmap []uint16, msg []byte, off int) (int, error) { if len(bitmap) == 0 { return off, nil } var lastwindow, lastlength uint16 for j := 0; j < len(bitmap); j++ { t := bitmap[j] window := t / 256 length := (t-window*256)/8 + 1 if window > lastwindow && lastlength != 0 { // New window, jump to the new offset off += int(lastlength) + 2 lastlength = 0 } if window < lastwindow || length < lastlength { return len(msg), &Error{err: "nsec bits out of order"} } if off+2+int(length) > len(msg) { return len(msg), &Error{err: "overflow packing nsec"} } // Setting the window # msg[off] = byte(window) // Setting the octets length msg[off+1] = byte(length) // Setting the bit value for the type in the right octet msg[off+1+int(length)] |= byte(1 << (7 - (t % 8))) lastwindow, lastlength = window, length } off += int(lastlength) + 2 return off, nil } func unpackDataDomainNames(msg []byte, off, end int) ([]string, int, error) { var ( servers []string s string err error ) if end > len(msg) { return nil, len(msg), &Error{err: "overflow unpacking domain names"} } for off < end { s, off, err = UnpackDomainName(msg, off) if err != nil { return servers, len(msg), err } servers = append(servers, s) } return servers, off, nil } func packDataDomainNames(names []string, msg []byte, off int, compression map[string]int, compress bool) (int, error) { var err error for j := 0; j < len(names); j++ { off, err = PackDomainName(names[j], msg, off, compression, false && compress) if err != nil { return len(msg), err } } return off, nil } golang-github-miekg-dns-1.0.4+ds/msg_test.go000066400000000000000000000104371325625637500207200ustar00rootroot00000000000000package dns import ( "fmt" "regexp" "strconv" "strings" "testing" ) const ( maxPrintableLabel = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789x" tooLongLabel = maxPrintableLabel + "x" ) var ( longDomain = maxPrintableLabel[:53] + strings.TrimSuffix( strings.Join([]string{".", ".", ".", ".", "."}, maxPrintableLabel[:49]), ".") reChar = regexp.MustCompile(`.`) i = -1 maxUnprintableLabel = reChar.ReplaceAllStringFunc(maxPrintableLabel, func(ch string) string { if i++; i >= 32 { i = 0 } return fmt.Sprintf("\\%03d", i) }) ) func TestUnpackDomainName(t *testing.T) { var cases = []struct { label string input string expectedOutput string expectedError string }{ {"empty domain", "\x00", ".", ""}, {"long label", string(63) + maxPrintableLabel + "\x00", maxPrintableLabel + ".", ""}, {"unprintable label", string(63) + regexp.MustCompile(`\\[0-9]+`).ReplaceAllStringFunc(maxUnprintableLabel, func(escape string) string { n, _ := strconv.ParseInt(escape[1:], 10, 8) return string(n) }) + "\x00", maxUnprintableLabel + ".", ""}, {"long domain", string(53) + strings.Replace(longDomain, ".", string(49), -1) + "\x00", longDomain + ".", ""}, {"compression pointer", // an unrealistic but functional test referencing an offset _inside_ a label "\x03foo" + "\x05\x03com\x00" + "\x07example" + "\xC0\x05", "foo.\\003com\\000.example.com.", ""}, {"too long domain", string(54) + "x" + strings.Replace(longDomain, ".", string(49), -1) + "\x00", "x" + longDomain + ".", ErrLongDomain.Error()}, {"too long by pointer", // a matryoshka doll name to get over 255 octets after expansion via internal pointers string([]byte{ // 11 length values, first to last 40, 37, 34, 31, 28, 25, 22, 19, 16, 13, 0, // 12 filler values 120, 120, 120, 120, 120, 120, 120, 120, 120, 120, 120, 120, // 10 pointers, last to first 192, 10, 192, 9, 192, 8, 192, 7, 192, 6, 192, 5, 192, 4, 192, 3, 192, 2, 192, 1, }), "", ErrLongDomain.Error()}, {"long by pointer", // a matryoshka doll name _not_ exceeding 255 octets after expansion string([]byte{ // 11 length values, first to last 37, 34, 31, 28, 25, 22, 19, 16, 13, 10, 0, // 9 filler values 120, 120, 120, 120, 120, 120, 120, 120, 120, // 10 pointers, last to first 192, 10, 192, 9, 192, 8, 192, 7, 192, 6, 192, 5, 192, 4, 192, 3, 192, 2, 192, 1, }), "" + (`\"\031\028\025\022\019\016\013\010\000xxxxxxxxx` + `\192\010\192\009\192\008\192\007\192\006\192\005\192\004\192\003\192\002.`) + (`\031\028\025\022\019\016\013\010\000xxxxxxxxx` + `\192\010\192\009\192\008\192\007\192\006\192\005\192\004\192\003.`) + (`\028\025\022\019\016\013\010\000xxxxxxxxx` + `\192\010\192\009\192\008\192\007\192\006\192\005\192\004.`) + (`\025\022\019\016\013\010\000xxxxxxxxx` + `\192\010\192\009\192\008\192\007\192\006\192\005.`) + `\022\019\016\013\010\000xxxxxxxxx\192\010\192\009\192\008\192\007\192\006.` + `\019\016\013\010\000xxxxxxxxx\192\010\192\009\192\008\192\007.` + `\016\013\010\000xxxxxxxxx\192\010\192\009\192\008.` + `\013\010\000xxxxxxxxx\192\010\192\009.` + `\010\000xxxxxxxxx\192\010.` + `\000xxxxxxxxx.`, ""}, {"truncated name", "\x07example\x03", "", "dns: buffer size too small"}, {"non-absolute name", "\x07example\x03com", "", "dns: buffer size too small"}, {"compression pointer cycle", "\x03foo" + "\x03bar" + "\x07example" + "\xC0\x04", "", "dns: too many compression pointers"}, {"reserved compression pointer 0b10", "\x07example\x80", "", "dns: bad rdata"}, {"reserved compression pointer 0b01", "\x07example\x40", "", "dns: bad rdata"}, } for _, test := range cases { output, idx, err := UnpackDomainName([]byte(test.input), 0) if test.expectedOutput != "" && output != test.expectedOutput { t.Errorf("%s: expected %s, got %s", test.label, test.expectedOutput, output) } if test.expectedError == "" && err != nil { t.Errorf("%s: expected no error, got %d %v", test.label, idx, err) } else if test.expectedError != "" && (err == nil || err.Error() != test.expectedError) { t.Errorf("%s: expected error %s, got %d %v", test.label, test.expectedError, idx, err) } } } golang-github-miekg-dns-1.0.4+ds/nsecx.go000066400000000000000000000050251325625637500202100ustar00rootroot00000000000000package dns import ( "crypto/sha1" "hash" "strings" ) type saltWireFmt struct { Salt string `dns:"size-hex"` } // HashName hashes a string (label) according to RFC 5155. It returns the hashed string in uppercase. func HashName(label string, ha uint8, iter uint16, salt string) string { saltwire := new(saltWireFmt) saltwire.Salt = salt wire := make([]byte, DefaultMsgSize) n, err := packSaltWire(saltwire, wire) if err != nil { return "" } wire = wire[:n] name := make([]byte, 255) off, err := PackDomainName(strings.ToLower(label), name, 0, nil, false) if err != nil { return "" } name = name[:off] var s hash.Hash switch ha { case SHA1: s = sha1.New() default: return "" } // k = 0 s.Write(name) s.Write(wire) nsec3 := s.Sum(nil) // k > 0 for k := uint16(0); k < iter; k++ { s.Reset() s.Write(nsec3) s.Write(wire) nsec3 = s.Sum(nsec3[:0]) } return toBase32(nsec3) } // Cover returns true if a name is covered by the NSEC3 record func (rr *NSEC3) Cover(name string) bool { nameHash := HashName(name, rr.Hash, rr.Iterations, rr.Salt) owner := strings.ToUpper(rr.Hdr.Name) labelIndices := Split(owner) if len(labelIndices) < 2 { return false } ownerHash := owner[:labelIndices[1]-1] ownerZone := owner[labelIndices[1]:] if !IsSubDomain(ownerZone, strings.ToUpper(name)) { // name is outside owner zone return false } nextHash := rr.NextDomain if ownerHash == nextHash { // empty interval return false } if ownerHash > nextHash { // end of zone if nameHash > ownerHash { // covered since there is nothing after ownerHash return true } return nameHash < nextHash // if nameHash is before beginning of zone it is covered } if nameHash < ownerHash { // nameHash is before ownerHash, not covered return false } return nameHash < nextHash // if nameHash is before nextHash is it covered (between ownerHash and nextHash) } // Match returns true if a name matches the NSEC3 record func (rr *NSEC3) Match(name string) bool { nameHash := HashName(name, rr.Hash, rr.Iterations, rr.Salt) owner := strings.ToUpper(rr.Hdr.Name) labelIndices := Split(owner) if len(labelIndices) < 2 { return false } ownerHash := owner[:labelIndices[1]-1] ownerZone := owner[labelIndices[1]:] if !IsSubDomain(ownerZone, strings.ToUpper(name)) { // name is outside owner zone return false } if ownerHash == nameHash { return true } return false } func packSaltWire(sw *saltWireFmt, msg []byte) (int, error) { off, err := packStringHex(sw.Salt, msg, 0) if err != nil { return off, err } return off, nil } golang-github-miekg-dns-1.0.4+ds/nsecx_test.go000066400000000000000000000075631325625637500212600ustar00rootroot00000000000000package dns import "testing" func TestPackNsec3(t *testing.T) { nsec3 := HashName("dnsex.nl.", SHA1, 0, "DEAD") if nsec3 != "ROCCJAE8BJJU7HN6T7NG3TNM8ACRS87J" { t.Error(nsec3) } nsec3 = HashName("a.b.c.example.org.", SHA1, 2, "DEAD") if nsec3 != "6LQ07OAHBTOOEU2R9ANI2AT70K5O0RCG" { t.Error(nsec3) } } func TestNsec3(t *testing.T) { nsec3 := testRR("sk4e8fj94u78smusb40o1n0oltbblu2r.nl. IN NSEC3 1 1 5 F10E9F7EA83FC8F3 SK4F38CQ0ATIEI8MH3RGD0P5I4II6QAN NS SOA TXT RRSIG DNSKEY NSEC3PARAM") if !nsec3.(*NSEC3).Match("nl.") { // name hash = sk4e8fj94u78smusb40o1n0oltbblu2r t.Fatal("sk4e8fj94u78smusb40o1n0oltbblu2r.nl. should match sk4e8fj94u78smusb40o1n0oltbblu2r.nl.") } if !nsec3.(*NSEC3).Match("NL.") { // name hash = sk4e8fj94u78smusb40o1n0oltbblu2r t.Fatal("sk4e8fj94u78smusb40o1n0oltbblu2r.NL. should match sk4e8fj94u78smusb40o1n0oltbblu2r.nl.") } if nsec3.(*NSEC3).Match("com.") { // t.Fatal("com. is not in the zone nl.") } if nsec3.(*NSEC3).Match("test.nl.") { // name hash = gd0ptr5bnfpimpu2d3v6gd4n0bai7s0q t.Fatal("gd0ptr5bnfpimpu2d3v6gd4n0bai7s0q.nl. should not match sk4e8fj94u78smusb40o1n0oltbblu2r.nl.") } nsec3 = testRR("nl. IN NSEC3 1 1 5 F10E9F7EA83FC8F3 SK4F38CQ0ATIEI8MH3RGD0P5I4II6QAN NS SOA TXT RRSIG DNSKEY NSEC3PARAM") if nsec3.(*NSEC3).Match("nl.") { t.Fatal("sk4e8fj94u78smusb40o1n0oltbblu2r.nl. should not match a record without a owner hash") } for _, tc := range []struct { rr *NSEC3 name string covers bool }{ // positive tests { // name hash between owner hash and next hash rr: &NSEC3{ Hdr: RR_Header{Name: "2N1TB3VAIRUOBL6RKDVII42N9TFMIALP.com."}, Hash: 1, Flags: 1, Iterations: 5, Salt: "F10E9F7EA83FC8F3", NextDomain: "PT3RON8N7PM3A0OE989IB84OOSADP7O8", }, name: "bsd.com.", covers: true, }, { // end of zone, name hash is after owner hash rr: &NSEC3{ Hdr: RR_Header{Name: "3v62ulr0nre83v0rja2vjgtlif9v6rab.com."}, Hash: 1, Flags: 1, Iterations: 5, Salt: "F10E9F7EA83FC8F3", NextDomain: "2N1TB3VAIRUOBL6RKDVII42N9TFMIALP", }, name: "csd.com.", covers: true, }, { // end of zone, name hash is before beginning of zone rr: &NSEC3{ Hdr: RR_Header{Name: "PT3RON8N7PM3A0OE989IB84OOSADP7O8.com."}, Hash: 1, Flags: 1, Iterations: 5, Salt: "F10E9F7EA83FC8F3", NextDomain: "3V62ULR0NRE83V0RJA2VJGTLIF9V6RAB", }, name: "asd.com.", covers: true, }, // negative tests { // too short owner name rr: &NSEC3{ Hdr: RR_Header{Name: "nl."}, Hash: 1, Flags: 1, Iterations: 5, Salt: "F10E9F7EA83FC8F3", NextDomain: "39P99DCGG0MDLARTCRMCF6OFLLUL7PR6", }, name: "asd.com.", covers: false, }, { // outside of zone rr: &NSEC3{ Hdr: RR_Header{Name: "39p91242oslggest5e6a7cci4iaeqvnk.nl."}, Hash: 1, Flags: 1, Iterations: 5, Salt: "F10E9F7EA83FC8F3", NextDomain: "39P99DCGG0MDLARTCRMCF6OFLLUL7PR6", }, name: "asd.com.", covers: false, }, { // empty interval rr: &NSEC3{ Hdr: RR_Header{Name: "2n1tb3vairuobl6rkdvii42n9tfmialp.com."}, Hash: 1, Flags: 1, Iterations: 5, Salt: "F10E9F7EA83FC8F3", NextDomain: "2N1TB3VAIRUOBL6RKDVII42N9TFMIALP", }, name: "asd.com.", covers: false, }, { // name hash is before owner hash, not covered rr: &NSEC3{ Hdr: RR_Header{Name: "3V62ULR0NRE83V0RJA2VJGTLIF9V6RAB.com."}, Hash: 1, Flags: 1, Iterations: 5, Salt: "F10E9F7EA83FC8F3", NextDomain: "PT3RON8N7PM3A0OE989IB84OOSADP7O8", }, name: "asd.com.", covers: false, }, } { covers := tc.rr.Cover(tc.name) if tc.covers != covers { t.Fatalf("cover failed for %s: expected %t, got %t [record: %s]", tc.name, tc.covers, covers, tc.rr) } } } golang-github-miekg-dns-1.0.4+ds/parse_test.go000066400000000000000000001443271325625637500212520ustar00rootroot00000000000000package dns import ( "bytes" "crypto/rsa" "encoding/hex" "fmt" "math/rand" "net" "reflect" "regexp" "strconv" "strings" "testing" "testing/quick" ) func TestDotInName(t *testing.T) { buf := make([]byte, 20) PackDomainName("aa\\.bb.nl.", buf, 0, nil, false) // index 3 must be a real dot if buf[3] != '.' { t.Error("dot should be a real dot") } if buf[6] != 2 { t.Error("this must have the value 2") } dom, _, _ := UnpackDomainName(buf, 0) // printing it should yield the backspace again if dom != "aa\\.bb.nl." { t.Error("dot should have been escaped: ", dom) } } func TestDotLastInLabel(t *testing.T) { sample := "aa\\..au." buf := make([]byte, 20) _, err := PackDomainName(sample, buf, 0, nil, false) if err != nil { t.Fatalf("unexpected error packing domain: %v", err) } dom, _, _ := UnpackDomainName(buf, 0) if dom != sample { t.Fatalf("unpacked domain `%s' doesn't match packed domain", dom) } } func TestTooLongDomainName(t *testing.T) { l := "aaabbbcccdddeeefffggghhhiiijjjkkklllmmmnnnooopppqqqrrrsssttt." dom := l + l + l + l + l + l + l _, err := NewRR(dom + " IN A 127.0.0.1") if err == nil { t.Error("should be too long") } _, err = NewRR("..com. IN A 127.0.0.1") if err == nil { t.Error("should fail") } } func TestDomainName(t *testing.T) { tests := []string{"r\\.gieben.miek.nl.", "www\\.www.miek.nl.", "www.*.miek.nl.", "www.*.miek.nl.", } dbuff := make([]byte, 40) for _, ts := range tests { if _, err := PackDomainName(ts, dbuff, 0, nil, false); err != nil { t.Error("not a valid domain name") continue } n, _, err := UnpackDomainName(dbuff, 0) if err != nil { t.Error("failed to unpack packed domain name") continue } if ts != n { t.Errorf("must be equal: in: %s, out: %s", ts, n) } } } func TestDomainNameAndTXTEscapes(t *testing.T) { tests := []byte{'.', '(', ')', ';', ' ', '@', '"', '\\', 9, 13, 10, 0, 255} for _, b := range tests { rrbytes := []byte{ 1, b, 0, // owner byte(TypeTXT >> 8), byte(TypeTXT), byte(ClassINET >> 8), byte(ClassINET), 0, 0, 0, 1, // TTL 0, 2, 1, b, // Data } rr1, _, err := UnpackRR(rrbytes, 0) if err != nil { panic(err) } s := rr1.String() rr2, err := NewRR(s) if err != nil { t.Errorf("error parsing unpacked RR's string: %v", err) } repacked := make([]byte, len(rrbytes)) if _, err := PackRR(rr2, repacked, 0, nil, false); err != nil { t.Errorf("error packing parsed RR: %v", err) } if !bytes.Equal(repacked, rrbytes) { t.Error("packed bytes don't match original bytes") } } } func TestTXTEscapeParsing(t *testing.T) { test := [][]string{ {`";"`, `";"`}, {`\;`, `";"`}, {`"\t"`, `"t"`}, {`"\r"`, `"r"`}, {`"\ "`, `" "`}, {`"\;"`, `";"`}, {`"\;\""`, `";\""`}, {`"\(a\)"`, `"(a)"`}, {`"\(a)"`, `"(a)"`}, {`"(a\)"`, `"(a)"`}, {`"(a)"`, `"(a)"`}, {`"\048"`, `"0"`}, {`"\` + "\t" + `"`, `"\009"`}, {`"\` + "\n" + `"`, `"\010"`}, {`"\` + "\r" + `"`, `"\013"`}, {`"\` + "\x11" + `"`, `"\017"`}, {`"\'"`, `"'"`}, } for _, s := range test { rr, err := NewRR(fmt.Sprintf("example.com. IN TXT %v", s[0])) if err != nil { t.Errorf("could not parse %v TXT: %s", s[0], err) continue } txt := sprintTxt(rr.(*TXT).Txt) if txt != s[1] { t.Errorf("mismatch after parsing `%v` TXT record: `%v` != `%v`", s[0], txt, s[1]) } } } func GenerateDomain(r *rand.Rand, size int) []byte { dnLen := size % 70 // artificially limit size so there's less to interpret if a failure occurs var dn []byte done := false for i := 0; i < dnLen && !done; { max := dnLen - i if max > 63 { max = 63 } lLen := max if lLen != 0 { lLen = int(r.Int31()) % max } done = lLen == 0 if done { continue } l := make([]byte, lLen+1) l[0] = byte(lLen) for j := 0; j < lLen; j++ { l[j+1] = byte(rand.Int31()) } dn = append(dn, l...) i += 1 + lLen } return append(dn, 0) } func TestDomainQuick(t *testing.T) { r := rand.New(rand.NewSource(0)) f := func(l int) bool { db := GenerateDomain(r, l) ds, _, err := UnpackDomainName(db, 0) if err != nil { panic(err) } buf := make([]byte, 255) off, err := PackDomainName(ds, buf, 0, nil, false) if err != nil { t.Errorf("error packing domain: %v", err) t.Errorf(" bytes: %v", db) t.Errorf("string: %v", ds) return false } if !bytes.Equal(db, buf[:off]) { t.Errorf("repacked domain doesn't match original:") t.Errorf("src bytes: %v", db) t.Errorf(" string: %v", ds) t.Errorf("out bytes: %v", buf[:off]) return false } return true } if err := quick.Check(f, nil); err != nil { t.Error(err) } } func GenerateTXT(r *rand.Rand, size int) []byte { rdLen := size % 300 // artificially limit size so there's less to interpret if a failure occurs var rd []byte for i := 0; i < rdLen; { max := rdLen - 1 if max > 255 { max = 255 } sLen := max if max != 0 { sLen = int(r.Int31()) % max } s := make([]byte, sLen+1) s[0] = byte(sLen) for j := 0; j < sLen; j++ { s[j+1] = byte(rand.Int31()) } rd = append(rd, s...) i += 1 + sLen } return rd } // Ok, 2 things. 1) this test breaks with the new functionality of splitting up larger txt // chunks into 255 byte pieces. 2) I don't like the random nature of this thing, because I can't // place the quotes where they need to be. // So either add some code the places the quotes in just the right spots, make this non random // or do something else. // Disabled for now. (miek) func testTXTRRQuick(t *testing.T) { s := rand.NewSource(0) r := rand.New(s) typeAndClass := []byte{ byte(TypeTXT >> 8), byte(TypeTXT), byte(ClassINET >> 8), byte(ClassINET), 0, 0, 0, 1, // TTL } f := func(l int) bool { owner := GenerateDomain(r, l) rdata := GenerateTXT(r, l) rrbytes := make([]byte, 0, len(owner)+2+2+4+2+len(rdata)) rrbytes = append(rrbytes, owner...) rrbytes = append(rrbytes, typeAndClass...) rrbytes = append(rrbytes, byte(len(rdata)>>8)) rrbytes = append(rrbytes, byte(len(rdata))) rrbytes = append(rrbytes, rdata...) rr, _, err := UnpackRR(rrbytes, 0) if err != nil { panic(err) } buf := make([]byte, len(rrbytes)*3) off, err := PackRR(rr, buf, 0, nil, false) if err != nil { t.Errorf("pack Error: %v\nRR: %v", err, rr) return false } buf = buf[:off] if !bytes.Equal(buf, rrbytes) { t.Errorf("packed bytes don't match original bytes") t.Errorf("src bytes: %v", rrbytes) t.Errorf(" struct: %v", rr) t.Errorf("out bytes: %v", buf) return false } if len(rdata) == 0 { // string'ing won't produce any data to parse return true } rrString := rr.String() rr2, err := NewRR(rrString) if err != nil { t.Errorf("error parsing own output: %v", err) t.Errorf("struct: %v", rr) t.Errorf("string: %v", rrString) return false } if rr2.String() != rrString { t.Errorf("parsed rr.String() doesn't match original string") t.Errorf("original: %v", rrString) t.Errorf(" parsed: %v", rr2.String()) return false } buf = make([]byte, len(rrbytes)*3) off, err = PackRR(rr2, buf, 0, nil, false) if err != nil { t.Errorf("error packing parsed rr: %v", err) t.Errorf("unpacked Struct: %v", rr) t.Errorf(" string: %v", rrString) t.Errorf(" parsed Struct: %v", rr2) return false } buf = buf[:off] if !bytes.Equal(buf, rrbytes) { t.Errorf("parsed packed bytes don't match original bytes") t.Errorf(" source bytes: %v", rrbytes) t.Errorf("unpacked struct: %v", rr) t.Errorf(" string: %v", rrString) t.Errorf(" parsed struct: %v", rr2) t.Errorf(" repacked bytes: %v", buf) return false } return true } c := &quick.Config{MaxCountScale: 10} if err := quick.Check(f, c); err != nil { t.Error(err) } } func TestParseDirectiveMisc(t *testing.T) { tests := map[string]string{ "$ORIGIN miek.nl.\na IN NS b": "a.miek.nl.\t3600\tIN\tNS\tb.miek.nl.", "$TTL 2H\nmiek.nl. IN NS b.": "miek.nl.\t7200\tIN\tNS\tb.", "miek.nl. 1D IN NS b.": "miek.nl.\t86400\tIN\tNS\tb.", `name. IN SOA a6.nstld.com. hostmaster.nic.name. ( 203362132 ; serial 5m ; refresh (5 minutes) 5m ; retry (5 minutes) 2w ; expire (2 weeks) 300 ; minimum (5 minutes) )`: "name.\t3600\tIN\tSOA\ta6.nstld.com. hostmaster.nic.name. 203362132 300 300 1209600 300", ". 3600000 IN NS ONE.MY-ROOTS.NET.": ".\t3600000\tIN\tNS\tONE.MY-ROOTS.NET.", "ONE.MY-ROOTS.NET. 3600000 IN A 192.168.1.1": "ONE.MY-ROOTS.NET.\t3600000\tIN\tA\t192.168.1.1", } for i, o := range tests { rr, err := NewRR(i) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String()) } } } func TestNSEC(t *testing.T) { nsectests := map[string]string{ "nl. IN NSEC3PARAM 1 0 5 30923C44C6CBBB8F": "nl.\t3600\tIN\tNSEC3PARAM\t1 0 5 30923C44C6CBBB8F", "p2209hipbpnm681knjnu0m1febshlv4e.nl. IN NSEC3 1 1 5 30923C44C6CBBB8F P90DG1KE8QEAN0B01613LHQDG0SOJ0TA NS SOA TXT RRSIG DNSKEY NSEC3PARAM": "p2209hipbpnm681knjnu0m1febshlv4e.nl.\t3600\tIN\tNSEC3\t1 1 5 30923C44C6CBBB8F P90DG1KE8QEAN0B01613LHQDG0SOJ0TA NS SOA TXT RRSIG DNSKEY NSEC3PARAM", "localhost.dnssex.nl. IN NSEC www.dnssex.nl. A RRSIG NSEC": "localhost.dnssex.nl.\t3600\tIN\tNSEC\twww.dnssex.nl. A RRSIG NSEC", "localhost.dnssex.nl. IN NSEC www.dnssex.nl. A RRSIG NSEC TYPE65534": "localhost.dnssex.nl.\t3600\tIN\tNSEC\twww.dnssex.nl. A RRSIG NSEC TYPE65534", "localhost.dnssex.nl. IN NSEC www.dnssex.nl. A RRSIG NSec Type65534": "localhost.dnssex.nl.\t3600\tIN\tNSEC\twww.dnssex.nl. A RRSIG NSEC TYPE65534", "44ohaq2njb0idnvolt9ggthvsk1e1uv8.skydns.test. NSEC3 1 0 0 - 44OHAQ2NJB0IDNVOLT9GGTHVSK1E1UVA": "44ohaq2njb0idnvolt9ggthvsk1e1uv8.skydns.test.\t3600\tIN\tNSEC3\t1 0 0 - 44OHAQ2NJB0IDNVOLT9GGTHVSK1E1UVA", } for i, o := range nsectests { rr, err := NewRR(i) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String()) } } } func TestParseLOC(t *testing.T) { lt := map[string]string{ "SW1A2AA.find.me.uk. LOC 51 30 12.748 N 00 07 39.611 W 0.00m 0.00m 0.00m 0.00m": "SW1A2AA.find.me.uk.\t3600\tIN\tLOC\t51 30 12.748 N 00 07 39.611 W 0m 0.00m 0.00m 0.00m", "SW1A2AA.find.me.uk. LOC 51 0 0.0 N 00 07 39.611 W 0.00m 0.00m 0.00m 0.00m": "SW1A2AA.find.me.uk.\t3600\tIN\tLOC\t51 00 0.000 N 00 07 39.611 W 0m 0.00m 0.00m 0.00m", } for i, o := range lt { rr, err := NewRR(i) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String()) } } } func TestParseDS(t *testing.T) { dt := map[string]string{ "example.net. 3600 IN DS 40692 12 3 22261A8B0E0D799183E35E24E2AD6BB58533CBA7E3B14D659E9CA09B 2071398F": "example.net.\t3600\tIN\tDS\t40692 12 3 22261A8B0E0D799183E35E24E2AD6BB58533CBA7E3B14D659E9CA09B2071398F", } for i, o := range dt { rr, err := NewRR(i) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String()) } } } func TestQuotes(t *testing.T) { tests := map[string]string{ `t.example.com. IN TXT "a bc"`: "t.example.com.\t3600\tIN\tTXT\t\"a bc\"", `t.example.com. IN TXT "a bc"`: "t.example.com.\t3600\tIN\tTXT\t\"a\\010 bc\"", `t.example.com. IN TXT ""`: "t.example.com.\t3600\tIN\tTXT\t\"\"", `t.example.com. IN TXT "a"`: "t.example.com.\t3600\tIN\tTXT\t\"a\"", `t.example.com. IN TXT "aa"`: "t.example.com.\t3600\tIN\tTXT\t\"aa\"", `t.example.com. IN TXT "aaa" ;`: "t.example.com.\t3600\tIN\tTXT\t\"aaa\"", `t.example.com. IN TXT "abc" "DEF"`: "t.example.com.\t3600\tIN\tTXT\t\"abc\" \"DEF\"", `t.example.com. IN TXT "abc" ( "DEF" )`: "t.example.com.\t3600\tIN\tTXT\t\"abc\" \"DEF\"", `t.example.com. IN TXT aaa ;`: "t.example.com.\t3600\tIN\tTXT\t\"aaa\"", `t.example.com. IN TXT aaa aaa;`: "t.example.com.\t3600\tIN\tTXT\t\"aaa\" \"aaa\"", `t.example.com. IN TXT aaa aaa`: "t.example.com.\t3600\tIN\tTXT\t\"aaa\" \"aaa\"", `t.example.com. IN TXT aaa`: "t.example.com.\t3600\tIN\tTXT\t\"aaa\"", "cid.urn.arpa. NAPTR 100 50 \"s\" \"z3950+I2L+I2C\" \"\" _z3950._tcp.gatech.edu.": "cid.urn.arpa.\t3600\tIN\tNAPTR\t100 50 \"s\" \"z3950+I2L+I2C\" \"\" _z3950._tcp.gatech.edu.", "cid.urn.arpa. NAPTR 100 50 \"s\" \"rcds+I2C\" \"\" _rcds._udp.gatech.edu.": "cid.urn.arpa.\t3600\tIN\tNAPTR\t100 50 \"s\" \"rcds+I2C\" \"\" _rcds._udp.gatech.edu.", "cid.urn.arpa. NAPTR 100 50 \"s\" \"http+I2L+I2C+I2R\" \"\" _http._tcp.gatech.edu.": "cid.urn.arpa.\t3600\tIN\tNAPTR\t100 50 \"s\" \"http+I2L+I2C+I2R\" \"\" _http._tcp.gatech.edu.", "cid.urn.arpa. NAPTR 100 10 \"\" \"\" \"/urn:cid:.+@([^\\.]+\\.)(.*)$/\\2/i\" .": "cid.urn.arpa.\t3600\tIN\tNAPTR\t100 10 \"\" \"\" \"/urn:cid:.+@([^\\.]+\\.)(.*)$/\\2/i\" .", } for i, o := range tests { rr, err := NewRR(i) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is\n`%s'", i, o, rr.String()) } } } func TestParseClass(t *testing.T) { tests := map[string]string{ "t.example.com. IN A 127.0.0.1": "t.example.com. 3600 IN A 127.0.0.1", "t.example.com. CS A 127.0.0.1": "t.example.com. 3600 CS A 127.0.0.1", "t.example.com. CH A 127.0.0.1": "t.example.com. 3600 CH A 127.0.0.1", // ClassANY can not occur in zone files // "t.example.com. ANY A 127.0.0.1": "t.example.com. 3600 ANY A 127.0.0.1", "t.example.com. NONE A 127.0.0.1": "t.example.com. 3600 NONE A 127.0.0.1", "t.example.com. CLASS255 A 127.0.0.1": "t.example.com. 3600 CLASS255 A 127.0.0.1", } for i, o := range tests { rr, err := NewRR(i) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is\n`%s'", i, o, rr.String()) } } } func TestBrace(t *testing.T) { tests := map[string]string{ "(miek.nl.) 3600 IN A 127.0.1.1": "miek.nl.\t3600\tIN\tA\t127.0.1.1", "miek.nl. (3600) IN MX (10) elektron.atoom.net.": "miek.nl.\t3600\tIN\tMX\t10 elektron.atoom.net.", `miek.nl. IN ( 3600 A 127.0.0.1)`: "miek.nl.\t3600\tIN\tA\t127.0.0.1", "(miek.nl.) (A) (127.0.2.1)": "miek.nl.\t3600\tIN\tA\t127.0.2.1", "miek.nl A 127.0.3.1": "miek.nl.\t3600\tIN\tA\t127.0.3.1", "_ssh._tcp.local. 60 IN (PTR) stora._ssh._tcp.local.": "_ssh._tcp.local.\t60\tIN\tPTR\tstora._ssh._tcp.local.", "miek.nl. NS ns.miek.nl": "miek.nl.\t3600\tIN\tNS\tns.miek.nl.", `(miek.nl.) ( (IN) (AAAA) (::1) )`: "miek.nl.\t3600\tIN\tAAAA\t::1", `(miek.nl.) ( (IN) (AAAA) (::1))`: "miek.nl.\t3600\tIN\tAAAA\t::1", "miek.nl. IN AAAA ::2": "miek.nl.\t3600\tIN\tAAAA\t::2", `((m)(i)ek.(n)l.) (SOA) (soa.) (soa.) ( 2009032802 ; serial 21600 ; refresh (6 hours) 7(2)00 ; retry (2 hours) 604()800 ; expire (1 week) 3600 ; minimum (1 hour) )`: "miek.nl.\t3600\tIN\tSOA\tsoa. soa. 2009032802 21600 7200 604800 3600", "miek\\.nl. IN A 127.0.0.10": "miek\\.nl.\t3600\tIN\tA\t127.0.0.10", "miek.nl. IN A 127.0.0.11": "miek.nl.\t3600\tIN\tA\t127.0.0.11", "miek.nl. A 127.0.0.12": "miek.nl.\t3600\tIN\tA\t127.0.0.12", `miek.nl. 86400 IN SOA elektron.atoom.net. miekg.atoom.net. ( 2009032802 ; serial 21600 ; refresh (6 hours) 7200 ; retry (2 hours) 604800 ; expire (1 week) 3600 ; minimum (1 hour) )`: "miek.nl.\t86400\tIN\tSOA\telektron.atoom.net. miekg.atoom.net. 2009032802 21600 7200 604800 3600", } for i, o := range tests { rr, err := NewRR(i) if err != nil { t.Errorf("failed to parse RR: %v\n\t%s", err, i) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String()) } } } func TestParseFailure(t *testing.T) { tests := []string{"miek.nl. IN A 327.0.0.1", "miek.nl. IN AAAA ::x", "miek.nl. IN MX a0 miek.nl.", "miek.nl aap IN MX mx.miek.nl.", "miek.nl 200 IN mxx 10 mx.miek.nl.", "miek.nl. inn MX 10 mx.miek.nl.", // "miek.nl. IN CNAME ", // actually valid nowadays, zero size rdata "miek.nl. IN CNAME ..", "miek.nl. PA MX 10 miek.nl.", "miek.nl. ) IN MX 10 miek.nl.", } for _, s := range tests { _, err := NewRR(s) if err == nil { t.Errorf("should have triggered an error: \"%s\"", s) } } } func TestOmittedTTL(t *testing.T) { zone := ` $ORIGIN example.com. example.com. 42 IN SOA ns1.example.com. hostmaster.example.com. 1 86400 60 86400 3600 ; TTL=42 SOA example.com. NS 2 ; TTL=42 absolute owner name @ MD 3 ; TTL=42 current-origin owner name MF 4 ; TTL=42 leading-space implied owner name 43 TYPE65280 \# 1 05 ; TTL=43 implied owner name explicit TTL MB 6 ; TTL=43 leading-tab implied owner name $TTL 1337 example.com. 88 MG 7 ; TTL=88 explicit TTL example.com. MR 8 ; TTL=1337 after first $TTL $TTL 314 1 TXT 9 ; TTL=1 implied owner name explicit TTL example.com. DNAME 10 ; TTL=314 after second $TTL ` reCaseFromComment := regexp.MustCompile(`TTL=(\d+)\s+(.*)`) records := ParseZone(strings.NewReader(zone), "", "") var i int for record := range records { i++ if record.Error != nil { t.Error(record.Error) continue } expected := reCaseFromComment.FindStringSubmatch(record.Comment) expectedTTL, _ := strconv.ParseUint(expected[1], 10, 32) ttl := record.RR.Header().Ttl if ttl != uint32(expectedTTL) { t.Errorf("%s: expected TTL %d, got %d", expected[2], expectedTTL, ttl) } } if i != 10 { t.Errorf("expected %d records, got %d", 5, i) } } func TestRelativeNameErrors(t *testing.T) { var badZones = []struct { label string zoneContents string expectedErr string }{ { "relative owner name without origin", "example.com 3600 IN SOA ns.example.com. hostmaster.example.com. 1 86400 60 86400 3600", "bad owner name", }, { "relative owner name in RDATA", "example.com. 3600 IN SOA ns hostmaster 1 86400 60 86400 3600", "bad SOA Ns", }, { "origin reference without origin", "@ 3600 IN SOA ns.example.com. hostmaster.example.com. 1 86400 60 86400 3600", "bad owner name", }, { "relative owner name in $INCLUDE", "$INCLUDE file.db example.com", "bad origin name", }, { "relative owner name in $ORIGIN", "$ORIGIN example.com", "bad origin name", }, } for _, errorCase := range badZones { entries := ParseZone(strings.NewReader(errorCase.zoneContents), "", "") for entry := range entries { if entry.Error == nil { t.Errorf("%s: expected error, got nil", errorCase.label) continue } err := entry.Error.err if err != errorCase.expectedErr { t.Errorf("%s: expected error `%s`, got `%s`", errorCase.label, errorCase.expectedErr, err) } } } } func TestHIP(t *testing.T) { h := `www.example.com. IN HIP ( 2 200100107B1A74DF365639CC39F1D578 AwEAAbdxyhNuSutc5EMzxTs9LBPCIkOFH8cIvM4p 9+LrV4e19WzK00+CI6zBCQTdtWsuxKbWIy87UOoJTwkUs7lBu+Upr1gsNrut79ryra+bSRGQ b1slImA8YVJyuIDsj7kwzG7jnERNqnWxZ48AWkskmdHaVDP4BcelrTI3rMXdXF5D rvs1.example.com. rvs2.example.com. )` rr, err := NewRR(h) if err != nil { t.Fatalf("failed to parse RR: %v", err) } msg := new(Msg) msg.Answer = []RR{rr, rr} bytes, err := msg.Pack() if err != nil { t.Fatalf("failed to pack msg: %v", err) } if err := msg.Unpack(bytes); err != nil { t.Fatalf("failed to unpack msg: %v", err) } if len(msg.Answer) != 2 { t.Fatalf("2 answers expected: %v", msg) } for i, rr := range msg.Answer { rr := rr.(*HIP) if l := len(rr.RendezvousServers); l != 2 { t.Fatalf("2 servers expected, only %d in record %d:\n%v", l, i, msg) } for j, s := range []string{"rvs1.example.com.", "rvs2.example.com."} { if rr.RendezvousServers[j] != s { t.Fatalf("expected server %d of record %d to be %s:\n%v", j, i, s, msg) } } } } // Test with no known RR on the line func TestLineNumberError2(t *testing.T) { tests := map[string]string{ "example.com. 1000 SO master.example.com. admin.example.com. 1 4294967294 4294967293 4294967295 100": "dns: expecting RR type or class, not this...: \"SO\" at line: 1:21", "example.com 1000 IN TALINK a.example.com. b..example.com.": "dns: bad TALINK NextName: \"b..example.com.\" at line: 1:57", "example.com 1000 IN TALINK ( a.example.com. b..example.com. )": "dns: bad TALINK NextName: \"b..example.com.\" at line: 1:60", `example.com 1000 IN TALINK ( a.example.com. bb..example.com. )`: "dns: bad TALINK NextName: \"bb..example.com.\" at line: 2:18", // This is a bug, it should report an error on line 1, but the new is already processed. `example.com 1000 IN TALINK ( a.example.com. b...example.com. )`: "dns: bad TALINK NextName: \"b...example.com.\" at line: 2:1"} for in, errStr := range tests { _, err := NewRR(in) if err == nil { t.Error("err is nil") } else { if err.Error() != errStr { t.Errorf("%s: error should be %s is %v", in, errStr, err) } } } } // Test if the calculations are correct func TestRfc1982(t *testing.T) { // If the current time and the timestamp are more than 68 years apart // it means the date has wrapped. 0 is 1970 // fall in the current 68 year span strtests := []string{"20120525134203", "19700101000000", "20380119031408"} for _, v := range strtests { if x, _ := StringToTime(v); v != TimeToString(x) { t.Errorf("1982 arithmetic string failure %s (%s:%d)", v, TimeToString(x), x) } } inttests := map[uint32]string{0: "19700101000000", 1 << 31: "20380119031408", 1<<32 - 1: "21060207062815", } for i, v := range inttests { if TimeToString(i) != v { t.Errorf("1982 arithmetic int failure %d:%s (%s)", i, v, TimeToString(i)) } } // Future tests, these dates get parsed to a date within the current 136 year span future := map[string]string{"22680119031408": "20631123173144", "19010101121212": "20370206184028", "19210101121212": "20570206184028", "19500101121212": "20860206184028", "19700101000000": "19700101000000", "19690101000000": "21050207062816", "29210101121212": "21040522212236", } for from, to := range future { x, _ := StringToTime(from) y := TimeToString(x) if y != to { t.Errorf("1982 arithmetic future failure %s:%s (%s)", from, to, y) } } } func TestEmpty(t *testing.T) { for range ParseZone(strings.NewReader(""), "", "") { t.Errorf("should be empty") } } func TestLowercaseTokens(t *testing.T) { var testrecords = []string{ "example.org. 300 IN a 1.2.3.4", "example.org. 300 in A 1.2.3.4", "example.org. 300 in a 1.2.3.4", "example.org. 300 a 1.2.3.4", "example.org. 300 A 1.2.3.4", "example.org. IN a 1.2.3.4", "example.org. in A 1.2.3.4", "example.org. in a 1.2.3.4", "example.org. a 1.2.3.4", "example.org. A 1.2.3.4", "example.org. a 1.2.3.4", "$ORIGIN example.org.\n a 1.2.3.4", "$Origin example.org.\n a 1.2.3.4", "$origin example.org.\n a 1.2.3.4", "example.org. Class1 Type1 1.2.3.4", } for _, testrr := range testrecords { _, err := NewRR(testrr) if err != nil { t.Errorf("failed to parse %#v, got %v", testrr, err) } } } func TestSRVPacking(t *testing.T) { msg := Msg{} things := []string{"1.2.3.4:8484", "45.45.45.45:8484", "84.84.84.84:8484", } for i, n := range things { h, p, err := net.SplitHostPort(n) if err != nil { continue } port, _ := strconv.ParseUint(p, 10, 16) rr := &SRV{ Hdr: RR_Header{Name: "somename.", Rrtype: TypeSRV, Class: ClassINET, Ttl: 5}, Priority: uint16(i), Weight: 5, Port: uint16(port), Target: h + ".", } msg.Answer = append(msg.Answer, rr) } _, err := msg.Pack() if err != nil { t.Fatalf("couldn't pack %v: %v", msg, err) } } func TestParseBackslash(t *testing.T) { if _, err := NewRR("nul\\000gap.test.globnix.net. 600 IN A 192.0.2.10"); err != nil { t.Errorf("could not create RR with \\000 in it") } if _, err := NewRR(`nul\000gap.test.globnix.net. 600 IN TXT "Hello\123"`); err != nil { t.Errorf("could not create RR with \\000 in it") } if _, err := NewRR(`m\ @\ iek.nl. IN 3600 A 127.0.0.1`); err != nil { t.Errorf("could not create RR with \\ and \\@ in it") } } func TestILNP(t *testing.T) { tests := []string{ "host1.example.com.\t3600\tIN\tNID\t10 0014:4fff:ff20:ee64", "host1.example.com.\t3600\tIN\tNID\t20 0015:5fff:ff21:ee65", "host2.example.com.\t3600\tIN\tNID\t10 0016:6fff:ff22:ee66", "host1.example.com.\t3600\tIN\tL32\t10 10.1.2.0", "host1.example.com.\t3600\tIN\tL32\t20 10.1.4.0", "host2.example.com.\t3600\tIN\tL32\t10 10.1.8.0", "host1.example.com.\t3600\tIN\tL64\t10 2001:0DB8:1140:1000", "host1.example.com.\t3600\tIN\tL64\t20 2001:0DB8:2140:2000", "host2.example.com.\t3600\tIN\tL64\t10 2001:0DB8:4140:4000", "host1.example.com.\t3600\tIN\tLP\t10 l64-subnet1.example.com.", "host1.example.com.\t3600\tIN\tLP\t10 l64-subnet2.example.com.", "host1.example.com.\t3600\tIN\tLP\t20 l32-subnet1.example.com.", } for _, t1 := range tests { r, err := NewRR(t1) if err != nil { t.Fatalf("an error occurred: %v", err) } else { if t1 != r.String() { t.Fatalf("strings should be equal %s %s", t1, r.String()) } } } } func TestGposEidNimloc(t *testing.T) { dt := map[string]string{ "444433332222111199990123000000ff. NSAP-PTR foo.bar.com.": "444433332222111199990123000000ff.\t3600\tIN\tNSAP-PTR\tfoo.bar.com.", "lillee. IN GPOS -32.6882 116.8652 10.0": "lillee.\t3600\tIN\tGPOS\t-32.6882 116.8652 10.0", "hinault. IN GPOS -22.6882 116.8652 250.0": "hinault.\t3600\tIN\tGPOS\t-22.6882 116.8652 250.0", "VENERA. IN NIMLOC 75234159EAC457800920": "VENERA.\t3600\tIN\tNIMLOC\t75234159EAC457800920", "VAXA. IN EID 3141592653589793": "VAXA.\t3600\tIN\tEID\t3141592653589793", } for i, o := range dt { rr, err := NewRR(i) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String()) } } } func TestPX(t *testing.T) { dt := map[string]string{ "*.net2.it. IN PX 10 net2.it. PRMD-net2.ADMD-p400.C-it.": "*.net2.it.\t3600\tIN\tPX\t10 net2.it. PRMD-net2.ADMD-p400.C-it.", "ab.net2.it. IN PX 10 ab.net2.it. O-ab.PRMD-net2.ADMDb.C-it.": "ab.net2.it.\t3600\tIN\tPX\t10 ab.net2.it. O-ab.PRMD-net2.ADMDb.C-it.", } for i, o := range dt { rr, err := NewRR(i) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String()) } } } func TestComment(t *testing.T) { // Comments we must see comments := map[string]bool{"; this is comment 1": true, "; this is comment 4": true, "; this is comment 6": true, "; this is comment 7": true, "; this is comment 8": true} zone := ` foo. IN A 10.0.0.1 ; this is comment 1 foo. IN A ( 10.0.0.2 ; this is comment2 ) ; this is comment3 foo. IN A 10.0.0.3 foo. IN A ( 10.0.0.4 ); this is comment 4 foo. IN A 10.0.0.5 ; this is comment5 foo. IN A 10.0.0.6 foo. IN DNSKEY 256 3 5 AwEAAb+8l ; this is comment 6 foo. IN NSEC miek.nl. TXT RRSIG NSEC; this is comment 7 foo. IN TXT "THIS IS TEXT MAN"; this is comment 8 ` for x := range ParseZone(strings.NewReader(zone), ".", "") { if x.Error == nil { if x.Comment != "" { if _, ok := comments[x.Comment]; !ok { t.Errorf("wrong comment %s", x.Comment) } } } } } func TestEUIxx(t *testing.T) { tests := map[string]string{ "host.example. IN EUI48 00-00-5e-90-01-2a": "host.example.\t3600\tIN\tEUI48\t00-00-5e-90-01-2a", "host.example. IN EUI64 00-00-5e-ef-00-00-00-2a": "host.example.\t3600\tIN\tEUI64\t00-00-5e-ef-00-00-00-2a", } for i, o := range tests { r, err := NewRR(i) if err != nil { t.Errorf("failed to parse %s: %v", i, err) } if r.String() != o { t.Errorf("want %s, got %s", o, r.String()) } } } func TestUserRR(t *testing.T) { tests := map[string]string{ "host.example. IN UID 1234": "host.example.\t3600\tIN\tUID\t1234", "host.example. IN GID 1234556": "host.example.\t3600\tIN\tGID\t1234556", "host.example. IN UINFO \"Miek Gieben\"": "host.example.\t3600\tIN\tUINFO\t\"Miek Gieben\"", } for i, o := range tests { r, err := NewRR(i) if err != nil { t.Errorf("failed to parse %s: %v", i, err) } if r.String() != o { t.Errorf("want %s, got %s", o, r.String()) } } } func TestTXT(t *testing.T) { // Test single entry TXT record rr, err := NewRR(`_raop._tcp.local. 60 IN TXT "single value"`) if err != nil { t.Error("failed to parse single value TXT record", err) } else if rr, ok := rr.(*TXT); !ok { t.Error("wrong type, record should be of type TXT") } else { if len(rr.Txt) != 1 { t.Error("bad size of TXT value:", len(rr.Txt)) } else if rr.Txt[0] != "single value" { t.Error("bad single value") } if rr.String() != `_raop._tcp.local. 60 IN TXT "single value"` { t.Error("bad representation of TXT record:", rr.String()) } if rr.len() != 28+1+12 { t.Error("bad size of serialized record:", rr.len()) } } // Test multi entries TXT record rr, err = NewRR(`_raop._tcp.local. 60 IN TXT "a=1" "b=2" "c=3" "d=4"`) if err != nil { t.Error("failed to parse multi-values TXT record", err) } else if rr, ok := rr.(*TXT); !ok { t.Error("wrong type, record should be of type TXT") } else { if len(rr.Txt) != 4 { t.Error("bad size of TXT multi-value:", len(rr.Txt)) } else if rr.Txt[0] != "a=1" || rr.Txt[1] != "b=2" || rr.Txt[2] != "c=3" || rr.Txt[3] != "d=4" { t.Error("bad values in TXT records") } if rr.String() != `_raop._tcp.local. 60 IN TXT "a=1" "b=2" "c=3" "d=4"` { t.Error("bad representation of TXT multi value record:", rr.String()) } if rr.len() != 28+1+3+1+3+1+3+1+3 { t.Error("bad size of serialized multi value record:", rr.len()) } } // Test empty-string in TXT record rr, err = NewRR(`_raop._tcp.local. 60 IN TXT ""`) if err != nil { t.Error("failed to parse empty-string TXT record", err) } else if rr, ok := rr.(*TXT); !ok { t.Error("wrong type, record should be of type TXT") } else { if len(rr.Txt) != 1 { t.Error("bad size of TXT empty-string value:", len(rr.Txt)) } else if rr.Txt[0] != "" { t.Error("bad value for empty-string TXT record") } if rr.String() != `_raop._tcp.local. 60 IN TXT ""` { t.Error("bad representation of empty-string TXT record:", rr.String()) } if rr.len() != 28+1 { t.Error("bad size of serialized record:", rr.len()) } } // Test TXT record with chunk larger than 255 bytes, they should be split up, by the parser s := "" for i := 0; i < 255; i++ { s += "a" } s += "b" rr, err = NewRR(`test.local. 60 IN TXT "` + s + `"`) if err != nil { t.Error("failed to parse empty-string TXT record", err) } if rr.(*TXT).Txt[1] != "b" { t.Errorf("Txt should have two chunk, last one my be 'b', but is %s", rr.(*TXT).Txt[1]) } } func TestTypeXXXX(t *testing.T) { _, err := NewRR("example.com IN TYPE1234 \\# 4 aabbccdd") if err != nil { t.Errorf("failed to parse TYPE1234 RR: %v", err) } _, err = NewRR("example.com IN TYPE655341 \\# 8 aabbccddaabbccdd") if err == nil { t.Errorf("this should not work, for TYPE655341") } _, err = NewRR("example.com IN TYPE1 \\# 4 0a000001") if err == nil { t.Errorf("this should not work") } } func TestPTR(t *testing.T) { _, err := NewRR("144.2.0.192.in-addr.arpa. 900 IN PTR ilouse03146p0\\(.example.com.") if err != nil { t.Error("failed to parse ", err) } } func TestDigit(t *testing.T) { tests := map[string]byte{ "miek\\000.nl. 100 IN TXT \"A\"": 0, "miek\\001.nl. 100 IN TXT \"A\"": 1, "miek\\254.nl. 100 IN TXT \"A\"": 254, "miek\\255.nl. 100 IN TXT \"A\"": 255, "miek\\256.nl. 100 IN TXT \"A\"": 0, "miek\\257.nl. 100 IN TXT \"A\"": 1, "miek\\004.nl. 100 IN TXT \"A\"": 4, } for s, i := range tests { r, err := NewRR(s) buf := make([]byte, 40) if err != nil { t.Fatalf("failed to parse %v", err) } PackRR(r, buf, 0, nil, false) if buf[5] != i { t.Fatalf("5 pos must be %d, is %d", i, buf[5]) } r1, _, _ := UnpackRR(buf, 0) if r1.Header().Ttl != 100 { t.Fatalf("TTL should %d, is %d", 100, r1.Header().Ttl) } } } func TestParseRRSIGTimestamp(t *testing.T) { tests := map[string]bool{ `miek.nl. IN RRSIG SOA 8 2 43200 20140210031301 20140111031301 12051 miek.nl. MVZUyrYwq0iZhMFDDnVXD2BvuNiUJjSYlJAgzyAE6CF875BMvvZa+Sb0 RlSCL7WODQSQHhCx/fegHhVVF+Iz8N8kOLrmXD1+jO3Bm6Prl5UhcsPx WTBsg/kmxbp8sR1kvH4oZJtVfakG3iDerrxNaf0sQwhZzyfJQAqpC7pcBoc=`: true, `miek.nl. IN RRSIG SOA 8 2 43200 315565800 4102477800 12051 miek.nl. MVZUyrYwq0iZhMFDDnVXD2BvuNiUJjSYlJAgzyAE6CF875BMvvZa+Sb0 RlSCL7WODQSQHhCx/fegHhVVF+Iz8N8kOLrmXD1+jO3Bm6Prl5UhcsPx WTBsg/kmxbp8sR1kvH4oZJtVfakG3iDerrxNaf0sQwhZzyfJQAqpC7pcBoc=`: true, } for r := range tests { _, err := NewRR(r) if err != nil { t.Error(err) } } } func TestTxtEqual(t *testing.T) { rr1 := new(TXT) rr1.Hdr = RR_Header{Name: ".", Rrtype: TypeTXT, Class: ClassINET, Ttl: 0} rr1.Txt = []string{"a\"a", "\"", "b"} rr2, _ := NewRR(rr1.String()) if rr1.String() != rr2.String() { // This is not an error, but keep this test. t.Errorf("these two TXT records should match:\n%s\n%s", rr1.String(), rr2.String()) } } func TestTxtLong(t *testing.T) { rr1 := new(TXT) rr1.Hdr = RR_Header{Name: ".", Rrtype: TypeTXT, Class: ClassINET, Ttl: 0} // Make a long txt record, this breaks when sending the packet, // but not earlier. rr1.Txt = []string{"start-"} for i := 0; i < 200; i++ { rr1.Txt[0] += "start-" } str := rr1.String() if len(str) < len(rr1.Txt[0]) { t.Error("string conversion should work") } } // Basically, don't crash. func TestMalformedPackets(t *testing.T) { var packets = []string{ "0021641c0000000100000000000078787878787878787878787303636f6d0000100001", } // com = 63 6f 6d for _, packet := range packets { data, _ := hex.DecodeString(packet) var msg Msg msg.Unpack(data) } } type algorithm struct { name uint8 bits int } func TestNewPrivateKey(t *testing.T) { if testing.Short() { t.Skip("skipping test in short mode.") } algorithms := []algorithm{ {ECDSAP256SHA256, 256}, {ECDSAP384SHA384, 384}, {RSASHA1, 1024}, {RSASHA256, 2048}, {DSA, 1024}, {ED25519, 256}, } for _, algo := range algorithms { key := new(DNSKEY) key.Hdr.Rrtype = TypeDNSKEY key.Hdr.Name = "miek.nl." key.Hdr.Class = ClassINET key.Hdr.Ttl = 14400 key.Flags = 256 key.Protocol = 3 key.Algorithm = algo.name privkey, err := key.Generate(algo.bits) if err != nil { t.Fatal(err) } newPrivKey, err := key.NewPrivateKey(key.PrivateKeyString(privkey)) if err != nil { t.Error(key.String()) t.Error(key.PrivateKeyString(privkey)) t.Fatal(err) } switch newPrivKey := newPrivKey.(type) { case *rsa.PrivateKey: newPrivKey.Precompute() } if !reflect.DeepEqual(privkey, newPrivKey) { t.Errorf("[%v] Private keys differ:\n%#v\n%#v", AlgorithmToString[algo.name], privkey, newPrivKey) } } } // special input test func TestNewRRSpecial(t *testing.T) { var ( rr RR err error expect string ) rr, err = NewRR("; comment") expect = "" if err != nil { t.Errorf("unexpected err: %v", err) } if rr != nil { t.Errorf("unexpected result: [%s] != [%s]", rr, expect) } rr, err = NewRR("") expect = "" if err != nil { t.Errorf("unexpected err: %v", err) } if rr != nil { t.Errorf("unexpected result: [%s] != [%s]", rr, expect) } rr, err = NewRR("$ORIGIN foo.") expect = "" if err != nil { t.Errorf("unexpected err: %v", err) } if rr != nil { t.Errorf("unexpected result: [%s] != [%s]", rr, expect) } rr, err = NewRR(" ") expect = "" if err != nil { t.Errorf("unexpected err: %v", err) } if rr != nil { t.Errorf("unexpected result: [%s] != [%s]", rr, expect) } rr, err = NewRR("\n") expect = "" if err != nil { t.Errorf("unexpected err: %v", err) } if rr != nil { t.Errorf("unexpected result: [%s] != [%s]", rr, expect) } rr, err = NewRR("foo. A 1.1.1.1\nbar. A 2.2.2.2") expect = "foo.\t3600\tIN\tA\t1.1.1.1" if err != nil { t.Errorf("unexpected err: %v", err) } if rr == nil || rr.String() != expect { t.Errorf("unexpected result: [%s] != [%s]", rr, expect) } } func TestPrintfVerbsRdata(t *testing.T) { x, _ := NewRR("www.miek.nl. IN MX 20 mx.miek.nl.") if Field(x, 1) != "20" { t.Errorf("should be 20") } if Field(x, 2) != "mx.miek.nl." { t.Errorf("should be mx.miek.nl.") } x, _ = NewRR("www.miek.nl. IN A 127.0.0.1") if Field(x, 1) != "127.0.0.1" { t.Errorf("should be 127.0.0.1") } x, _ = NewRR("www.miek.nl. IN AAAA ::1") if Field(x, 1) != "::1" { t.Errorf("should be ::1") } x, _ = NewRR("www.miek.nl. IN NSEC a.miek.nl. A NS SOA MX AAAA") if Field(x, 1) != "a.miek.nl." { t.Errorf("should be a.miek.nl.") } if Field(x, 2) != "A NS SOA MX AAAA" { t.Errorf("should be A NS SOA MX AAAA") } x, _ = NewRR("www.miek.nl. IN TXT \"first\" \"second\"") if Field(x, 1) != "first second" { t.Errorf("should be first second") } if Field(x, 0) != "" { t.Errorf("should be empty") } } func TestParseTokenOverflow(t *testing.T) { _, err := NewRR("_443._tcp.example.org. IN TLSA 0 0 0 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") if err == nil { t.Fatalf("token overflow should return an error") } } func TestParseTLSA(t *testing.T) { lt := []string{ "_443._tcp.example.org.\t3600\tIN\tTLSA\t1 1 1 c22be239f483c08957bc106219cc2d3ac1a308dfbbdd0a365f17b9351234cf00", "_443._tcp.example.org.\t3600\tIN\tTLSA\t2 1 2 4e85f45179e9cd6e0e68e2eb5be2e85ec9b92d91c609caf3ef0315213e3f92ece92c38397a607214de95c7fadc0ad0f1c604a469a0387959745032c0d51492f3", "_443._tcp.example.org.\t3600\tIN\tTLSA\t3 0 2 69ec8d2277360b215d0cd956b0e2747108dff34b27d461a41c800629e38ee6c2d1230cc9e8e36711330adc6766e6ff7c5fbb37f106f248337c1a20ad682888d2", } for _, o := range lt { rr, err := NewRR(o) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is `%s'", o, o, rr.String()) } } } func TestParseSMIMEA(t *testing.T) { lt := map[string]string{ "2e85e1db3e62be6ea._smimecert.example.com.\t3600\tIN\tSMIMEA\t1 1 2 bd80f334566928fc18f58df7e4928c1886f48f71ca3fd41cd9b1854aca7c2180aaacad2819612ed68e7bd3701cc39be7f2529b017c0bc6a53e8fb3f0c7d48070": "2e85e1db3e62be6ea._smimecert.example.com.\t3600\tIN\tSMIMEA\t1 1 2 bd80f334566928fc18f58df7e4928c1886f48f71ca3fd41cd9b1854aca7c2180aaacad2819612ed68e7bd3701cc39be7f2529b017c0bc6a53e8fb3f0c7d48070", "2e85e1db3e62be6ea._smimecert.example.com.\t3600\tIN\tSMIMEA\t0 0 1 cdcf0fc66b182928c5217ddd42c826983f5a4b94160ee6c1c9be62d38199f710": "2e85e1db3e62be6ea._smimecert.example.com.\t3600\tIN\tSMIMEA\t0 0 1 cdcf0fc66b182928c5217ddd42c826983f5a4b94160ee6c1c9be62d38199f710", "2e85e1db3e62be6ea._smimecert.example.com.\t3600\tIN\tSMIMEA\t3 0 2 499a1eda2af8828b552cdb9d80c3744a25872fddd73f3898d8e4afa3549595d2dd4340126e759566fe8c26b251fa0c887ba4869f011a65f7e79967c2eb729f5b": "2e85e1db3e62be6ea._smimecert.example.com.\t3600\tIN\tSMIMEA\t3 0 2 499a1eda2af8828b552cdb9d80c3744a25872fddd73f3898d8e4afa3549595d2dd4340126e759566fe8c26b251fa0c887ba4869f011a65f7e79967c2eb729f5b", "2e85e1db3e62be6eb._smimecert.example.com.\t3600\tIN\tSMIMEA\t3 0 2 499a1eda2af8828b552cdb9d80c3744a25872fddd73f3898d8e4afa3549595d2dd4340126e759566fe8 c26b251fa0c887ba4869f01 1a65f7e79967c2eb729f5b": "2e85e1db3e62be6eb._smimecert.example.com.\t3600\tIN\tSMIMEA\t3 0 2 499a1eda2af8828b552cdb9d80c3744a25872fddd73f3898d8e4afa3549595d2dd4340126e759566fe8c26b251fa0c887ba4869f011a65f7e79967c2eb729f5b", } for i, o := range lt { rr, err := NewRR(i) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is `%s'", o, o, rr.String()) } } } func TestParseSSHFP(t *testing.T) { lt := []string{ "test.example.org.\t300\tSSHFP\t1 2 (\n" + "\t\t\t\t\tBC6533CDC95A79078A39A56EA7635984ED655318ADA9\n" + "\t\t\t\t\tB6159E30723665DA95BB )", "test.example.org.\t300\tSSHFP\t1 2 ( BC6533CDC 95A79078A39A56EA7635984ED655318AD A9B6159E3072366 5DA95BB )", } result := "test.example.org.\t300\tIN\tSSHFP\t1 2 BC6533CDC95A79078A39A56EA7635984ED655318ADA9B6159E30723665DA95BB" for _, o := range lt { rr, err := NewRR(o) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != result { t.Errorf("`%s' should be equal to\n\n`%s', but is \n`%s'", o, result, rr.String()) } } } func TestParseHINFO(t *testing.T) { dt := map[string]string{ "example.net. HINFO A B": "example.net. 3600 IN HINFO \"A\" \"B\"", "example.net. HINFO \"A\" \"B\"": "example.net. 3600 IN HINFO \"A\" \"B\"", "example.net. HINFO A B C D E F": "example.net. 3600 IN HINFO \"A\" \"B C D E F\"", "example.net. HINFO AB": "example.net. 3600 IN HINFO \"AB\" \"\"", // "example.net. HINFO PC-Intel-700mhz \"Redhat Linux 7.1\"": "example.net. 3600 IN HINFO \"PC-Intel-700mhz\" \"Redhat Linux 7.1\"", // This one is recommended in Pro Bind book http://www.zytrax.com/books/dns/ch8/hinfo.html // but effectively, even Bind would replace it to correctly formed text when you AXFR // TODO: remove this set of comments or figure support for quoted/unquoted combinations in endingToTxtSlice function } for i, o := range dt { rr, err := NewRR(i) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String()) } } } func TestParseCAA(t *testing.T) { lt := map[string]string{ "example.net. CAA 0 issue \"symantec.com\"": "example.net.\t3600\tIN\tCAA\t0 issue \"symantec.com\"", "example.net. CAA 0 issuewild \"symantec.com; stuff\"": "example.net.\t3600\tIN\tCAA\t0 issuewild \"symantec.com; stuff\"", "example.net. CAA 128 tbs \"critical\"": "example.net.\t3600\tIN\tCAA\t128 tbs \"critical\"", "example.net. CAA 2 auth \"0>09\\006\\010+\\006\\001\\004\\001\\214y\\002\\003\\001\\006\\009`\\134H\\001e\\003\\004\\002\\001\\004 y\\209\\012\\221r\\220\\156Q\\218\\150\\150{\\166\\245:\\231\\182%\\157:\\133\\179}\\1923r\\238\\151\\255\\128q\\145\\002\\001\\000\"": "example.net.\t3600\tIN\tCAA\t2 auth \"0>09\\006\\010+\\006\\001\\004\\001\\214y\\002\\003\\001\\006\\009`\\134H\\001e\\003\\004\\002\\001\\004 y\\209\\012\\221r\\220\\156Q\\218\\150\\150{\\166\\245:\\231\\182%\\157:\\133\\179}\\1923r\\238\\151\\255\\128q\\145\\002\\001\\000\"", "example.net. TYPE257 0 issue \"symantec.com\"": "example.net.\t3600\tIN\tCAA\t0 issue \"symantec.com\"", } for i, o := range lt { rr, err := NewRR(i) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String()) } } } func TestPackCAA(t *testing.T) { m := new(Msg) record := new(CAA) record.Hdr = RR_Header{Name: "example.com.", Rrtype: TypeCAA, Class: ClassINET, Ttl: 0} record.Tag = "issue" record.Value = "symantec.com" record.Flag = 1 m.Answer = append(m.Answer, record) bytes, err := m.Pack() if err != nil { t.Fatalf("failed to pack msg: %v", err) } if err := m.Unpack(bytes); err != nil { t.Fatalf("failed to unpack msg: %v", err) } if len(m.Answer) != 1 { t.Fatalf("incorrect number of answers unpacked") } rr := m.Answer[0].(*CAA) if rr.Tag != "issue" { t.Fatalf("invalid tag for unpacked answer") } else if rr.Value != "symantec.com" { t.Fatalf("invalid value for unpacked answer") } else if rr.Flag != 1 { t.Fatalf("invalid flag for unpacked answer") } } func TestParseURI(t *testing.T) { lt := map[string]string{ "_http._tcp. IN URI 10 1 \"http://www.example.com/path\"": "_http._tcp.\t3600\tIN\tURI\t10 1 \"http://www.example.com/path\"", "_http._tcp. IN URI 10 1 \"\"": "_http._tcp.\t3600\tIN\tURI\t10 1 \"\"", } for i, o := range lt { rr, err := NewRR(i) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String()) } } } func TestParseAVC(t *testing.T) { avcs := map[string]string{ `example.org. IN AVC "app-name:WOLFGANG|app-class:OAM|business=yes"`: `example.org. 3600 IN AVC "app-name:WOLFGANG|app-class:OAM|business=yes"`, } for avc, o := range avcs { rr, err := NewRR(avc) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is `%s'", avc, o, rr.String()) } } } func TestParseCSYNC(t *testing.T) { syncs := map[string]string{ `example.com. 3600 IN CSYNC 66 3 A NS AAAA`: `example.com. 3600 IN CSYNC 66 3 A NS AAAA`, } for s, o := range syncs { rr, err := NewRR(s) if err != nil { t.Error("failed to parse RR: ", err) continue } if rr.String() != o { t.Errorf("`%s' should be equal to\n`%s', but is `%s'", s, o, rr.String()) } } } func TestParseBadNAPTR(t *testing.T) { // Should look like: mplus.ims.vodafone.com. 3600 IN NAPTR 10 100 "S" "SIP+D2U" "" _sip._udp.mplus.ims.vodafone.com. naptr := `mplus.ims.vodafone.com. 3600 IN NAPTR 10 100 S SIP+D2U _sip._udp.mplus.ims.vodafone.com.` _, err := NewRR(naptr) // parse fails, we should not have leaked a goroutine. if err == nil { t.Fatalf("parsing NAPTR should have failed: %s", naptr) } if err := goroutineLeaked(); err != nil { t.Errorf("leaked goroutines: %s", err) } } func TestUnbalancedParens(t *testing.T) { sig := `example.com. 3600 IN RRSIG MX 15 2 3600 ( 1440021600 1438207200 3613 example.com. ( oL9krJun7xfBOIWcGHi7mag5/hdZrKWw15jPGrHpjQeRAvTdszaPD+QLs3f x8A4M3e23mRZ9VrbpMngwcrqNAg== )` _, err := NewRR(sig) if err == nil { t.Fatalf("failed to detect extra opening brace") } } func TestBad(t *testing.T) { tests := []string{ `" TYPE257 9 1E12\x00\x105"`, `" TYPE256 9 5"`, `" TYPE257 0\"00000000000000400000000000000000000\x00\x10000000000000000000000000000000000 9 l\x16\x01\x005266"`, } for i := range tests { s, err := strconv.Unquote(tests[i]) if err != nil { t.Fatalf("failed to unquote: %q: %s", tests[i], err) } if _, err = NewRR(s); err == nil { t.Errorf("correctly parsed %q", s) } } } golang-github-miekg-dns-1.0.4+ds/privaterr.go000066400000000000000000000100531325625637500211030ustar00rootroot00000000000000package dns import ( "fmt" "strings" ) // PrivateRdata is an interface used for implementing "Private Use" RR types, see // RFC 6895. This allows one to experiment with new RR types, without requesting an // official type code. Also see dns.PrivateHandle and dns.PrivateHandleRemove. type PrivateRdata interface { // String returns the text presentaton of the Rdata of the Private RR. String() string // Parse parses the Rdata of the private RR. Parse([]string) error // Pack is used when packing a private RR into a buffer. Pack([]byte) (int, error) // Unpack is used when unpacking a private RR from a buffer. // TODO(miek): diff. signature than Pack, see edns0.go for instance. Unpack([]byte) (int, error) // Copy copies the Rdata. Copy(PrivateRdata) error // Len returns the length in octets of the Rdata. Len() int } // PrivateRR represents an RR that uses a PrivateRdata user-defined type. // It mocks normal RRs and implements dns.RR interface. type PrivateRR struct { Hdr RR_Header Data PrivateRdata } func mkPrivateRR(rrtype uint16) *PrivateRR { // Panics if RR is not an instance of PrivateRR. rrfunc, ok := TypeToRR[rrtype] if !ok { panic(fmt.Sprintf("dns: invalid operation with Private RR type %d", rrtype)) } anyrr := rrfunc() switch rr := anyrr.(type) { case *PrivateRR: return rr } panic(fmt.Sprintf("dns: RR is not a PrivateRR, TypeToRR[%d] generator returned %T", rrtype, anyrr)) } // Header return the RR header of r. func (r *PrivateRR) Header() *RR_Header { return &r.Hdr } func (r *PrivateRR) String() string { return r.Hdr.String() + r.Data.String() } // Private len and copy parts to satisfy RR interface. func (r *PrivateRR) len() int { return r.Hdr.len() + r.Data.Len() } func (r *PrivateRR) copy() RR { // make new RR like this: rr := mkPrivateRR(r.Hdr.Rrtype) newh := r.Hdr.copyHeader() rr.Hdr = *newh err := r.Data.Copy(rr.Data) if err != nil { panic("dns: got value that could not be used to copy Private rdata") } return rr } func (r *PrivateRR) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := r.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off n, err := r.Data.Pack(msg[off:]) if err != nil { return len(msg), err } off += n r.Header().Rdlength = uint16(off - headerEnd) return off, nil } // PrivateHandle registers a private resource record type. It requires // string and numeric representation of private RR type and generator function as argument. func PrivateHandle(rtypestr string, rtype uint16, generator func() PrivateRdata) { rtypestr = strings.ToUpper(rtypestr) TypeToRR[rtype] = func() RR { return &PrivateRR{RR_Header{}, generator()} } TypeToString[rtype] = rtypestr StringToType[rtypestr] = rtype typeToUnpack[rtype] = func(h RR_Header, msg []byte, off int) (RR, int, error) { if noRdata(h) { return &h, off, nil } var err error rr := mkPrivateRR(h.Rrtype) rr.Hdr = h off1, err := rr.Data.Unpack(msg[off:]) off += off1 if err != nil { return rr, off, err } return rr, off, err } setPrivateRR := func(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := mkPrivateRR(h.Rrtype) rr.Hdr = h var l lex text := make([]string, 0, 2) // could be 0..N elements, median is probably 1 Fetch: for { // TODO(miek): we could also be returning _QUOTE, this might or might not // be an issue (basically parsing TXT becomes hard) switch l = <-c; l.value { case zNewline, zEOF: break Fetch case zString: text = append(text, l.token) } } err := rr.Data.Parse(text) if err != nil { return nil, &ParseError{f, err.Error(), l}, "" } return rr, nil, "" } typeToparserFunc[rtype] = parserFunc{setPrivateRR, true} } // PrivateHandleRemove removes defenitions required to support private RR type. func PrivateHandleRemove(rtype uint16) { rtypestr, ok := TypeToString[rtype] if ok { delete(TypeToRR, rtype) delete(TypeToString, rtype) delete(typeToparserFunc, rtype) delete(StringToType, rtypestr) delete(typeToUnpack, rtype) } return } golang-github-miekg-dns-1.0.4+ds/privaterr_test.go000066400000000000000000000067511325625637500221540ustar00rootroot00000000000000package dns_test import ( "strings" "testing" "github.com/miekg/dns" ) const TypeISBN uint16 = 0xFF00 // A crazy new RR type :) type ISBN struct { x string // rdata with 10 or 13 numbers, dashes or spaces allowed } func NewISBN() dns.PrivateRdata { return &ISBN{""} } func (rd *ISBN) Len() int { return len([]byte(rd.x)) } func (rd *ISBN) String() string { return rd.x } func (rd *ISBN) Parse(txt []string) error { rd.x = strings.TrimSpace(strings.Join(txt, " ")) return nil } func (rd *ISBN) Pack(buf []byte) (int, error) { b := []byte(rd.x) n := copy(buf, b) if n != len(b) { return n, dns.ErrBuf } return n, nil } func (rd *ISBN) Unpack(buf []byte) (int, error) { rd.x = string(buf) return len(buf), nil } func (rd *ISBN) Copy(dest dns.PrivateRdata) error { isbn, ok := dest.(*ISBN) if !ok { return dns.ErrRdata } isbn.x = rd.x return nil } var testrecord = strings.Join([]string{"example.org.", "3600", "IN", "ISBN", "12-3 456789-0-123"}, "\t") func TestPrivateText(t *testing.T) { dns.PrivateHandle("ISBN", TypeISBN, NewISBN) defer dns.PrivateHandleRemove(TypeISBN) rr, err := dns.NewRR(testrecord) if err != nil { t.Fatal(err) } if rr.String() != testrecord { t.Errorf("record string representation did not match original %#v != %#v", rr.String(), testrecord) } } func TestPrivateByteSlice(t *testing.T) { dns.PrivateHandle("ISBN", TypeISBN, NewISBN) defer dns.PrivateHandleRemove(TypeISBN) rr, err := dns.NewRR(testrecord) if err != nil { t.Fatal(err) } buf := make([]byte, 100) off, err := dns.PackRR(rr, buf, 0, nil, false) if err != nil { t.Errorf("got error packing ISBN: %v", err) } custrr := rr.(*dns.PrivateRR) if ln := custrr.Data.Len() + len(custrr.Header().Name) + 11; ln != off { t.Errorf("offset is not matching to length of Private RR: %d!=%d", off, ln) } rr1, off1, err := dns.UnpackRR(buf[:off], 0) if err != nil { t.Errorf("got error unpacking ISBN: %v", err) return } if off1 != off { t.Errorf("offset after unpacking differs: %d != %d", off1, off) } if rr1.String() != testrecord { t.Errorf("record string representation did not match original %#v != %#v", rr1.String(), testrecord) } } const TypeVERSION uint16 = 0xFF01 type VERSION struct { x string } func NewVersion() dns.PrivateRdata { return &VERSION{""} } func (rd *VERSION) String() string { return rd.x } func (rd *VERSION) Parse(txt []string) error { rd.x = strings.TrimSpace(strings.Join(txt, " ")) return nil } func (rd *VERSION) Pack(buf []byte) (int, error) { b := []byte(rd.x) n := copy(buf, b) if n != len(b) { return n, dns.ErrBuf } return n, nil } func (rd *VERSION) Unpack(buf []byte) (int, error) { rd.x = string(buf) return len(buf), nil } func (rd *VERSION) Copy(dest dns.PrivateRdata) error { isbn, ok := dest.(*VERSION) if !ok { return dns.ErrRdata } isbn.x = rd.x return nil } func (rd *VERSION) Len() int { return len([]byte(rd.x)) } var smallzone = `$ORIGIN example.org. @ 3600 IN SOA sns.dns.icann.org. noc.dns.icann.org. ( 2014091518 7200 3600 1209600 3600 ) A 1.2.3.4 ok ISBN 1231-92110-12 go VERSION ( 1.3.1 ; comment ) www ISBN 1231-92110-16 * CNAME @ ` func TestPrivateZoneParser(t *testing.T) { dns.PrivateHandle("ISBN", TypeISBN, NewISBN) dns.PrivateHandle("VERSION", TypeVERSION, NewVersion) defer dns.PrivateHandleRemove(TypeISBN) defer dns.PrivateHandleRemove(TypeVERSION) r := strings.NewReader(smallzone) for x := range dns.ParseZone(r, ".", "") { if err := x.Error; err != nil { t.Fatal(err) } } } golang-github-miekg-dns-1.0.4+ds/rawmsg.go000066400000000000000000000020651325625637500203710ustar00rootroot00000000000000package dns import "encoding/binary" // rawSetRdlength sets the rdlength in the header of // the RR. The offset 'off' must be positioned at the // start of the header of the RR, 'end' must be the // end of the RR. func rawSetRdlength(msg []byte, off, end int) bool { l := len(msg) Loop: for { if off+1 > l { return false } c := int(msg[off]) off++ switch c & 0xC0 { case 0x00: if c == 0x00 { // End of the domainname break Loop } if off+c > l { return false } off += c case 0xC0: // pointer, next byte included, ends domainname off++ break Loop } } // The domainname has been seen, we at the start of the fixed part in the header. // Type is 2 bytes, class is 2 bytes, ttl 4 and then 2 bytes for the length. off += 2 + 2 + 4 if off+2 > l { return false } //off+1 is the end of the header, 'end' is the end of the rr //so 'end' - 'off+2' is the length of the rdata rdatalen := end - (off + 2) if rdatalen > 0xFFFF { return false } binary.BigEndian.PutUint16(msg[off:], uint16(rdatalen)) return true } golang-github-miekg-dns-1.0.4+ds/remote_test.go000066400000000000000000000006011325625637500214150ustar00rootroot00000000000000package dns import "testing" const LinodeAddr = "176.58.119.54:53" func TestClientRemote(t *testing.T) { m := new(Msg) m.SetQuestion("go.dns.miek.nl.", TypeTXT) c := new(Client) r, _, err := c.Exchange(m, LinodeAddr) if err != nil { t.Errorf("failed to exchange: %v", err) } if r != nil && r.Rcode != RcodeSuccess { t.Errorf("failed to get an valid answer\n%v", r) } } golang-github-miekg-dns-1.0.4+ds/reverse.go000066400000000000000000000016011325625637500205370ustar00rootroot00000000000000package dns // StringToType is the reverse of TypeToString, needed for string parsing. var StringToType = reverseInt16(TypeToString) // StringToClass is the reverse of ClassToString, needed for string parsing. var StringToClass = reverseInt16(ClassToString) // StringToOpcode is a map of opcodes to strings. var StringToOpcode = reverseInt(OpcodeToString) // StringToRcode is a map of rcodes to strings. var StringToRcode = reverseInt(RcodeToString) // Reverse a map func reverseInt8(m map[uint8]string) map[string]uint8 { n := make(map[string]uint8, len(m)) for u, s := range m { n[s] = u } return n } func reverseInt16(m map[uint16]string) map[string]uint16 { n := make(map[string]uint16, len(m)) for u, s := range m { n[s] = u } return n } func reverseInt(m map[int]string) map[string]int { n := make(map[string]int, len(m)) for u, s := range m { n[s] = u } return n } golang-github-miekg-dns-1.0.4+ds/rr_test.go000066400000000000000000000002101325625637500205410ustar00rootroot00000000000000package dns // testRR returns the RR from string s. The error is thrown away. func testRR(s string) RR { r, _ := NewRR(s) return r } golang-github-miekg-dns-1.0.4+ds/sanitize.go000066400000000000000000000037541325625637500207250ustar00rootroot00000000000000package dns // Dedup removes identical RRs from rrs. It preserves the original ordering. // The lowest TTL of any duplicates is used in the remaining one. Dedup modifies // rrs. // m is used to store the RRs temporary. If it is nil a new map will be allocated. func Dedup(rrs []RR, m map[string]RR) []RR { if m == nil { m = make(map[string]RR) } // Save the keys, so we don't have to call normalizedString twice. keys := make([]*string, 0, len(rrs)) for _, r := range rrs { key := normalizedString(r) keys = append(keys, &key) if _, ok := m[key]; ok { // Shortest TTL wins. if m[key].Header().Ttl > r.Header().Ttl { m[key].Header().Ttl = r.Header().Ttl } continue } m[key] = r } // If the length of the result map equals the amount of RRs we got, // it means they were all different. We can then just return the original rrset. if len(m) == len(rrs) { return rrs } j := 0 for i, r := range rrs { // If keys[i] lives in the map, we should copy and remove it. if _, ok := m[*keys[i]]; ok { delete(m, *keys[i]) rrs[j] = r j++ } if len(m) == 0 { break } } return rrs[:j] } // normalizedString returns a normalized string from r. The TTL // is removed and the domain name is lowercased. We go from this: // DomainNameTTLCLASSTYPERDATA to: // lowercasenameCLASSTYPE... func normalizedString(r RR) string { // A string Go DNS makes has: domainnameTTL... b := []byte(r.String()) // find the first non-escaped tab, then another, so we capture where the TTL lives. esc := false ttlStart, ttlEnd := 0, 0 for i := 0; i < len(b) && ttlEnd == 0; i++ { switch { case b[i] == '\\': esc = !esc case b[i] == '\t' && !esc: if ttlStart == 0 { ttlStart = i continue } if ttlEnd == 0 { ttlEnd = i } case b[i] >= 'A' && b[i] <= 'Z' && !esc: b[i] += 32 default: esc = false } } // remove TTL. copy(b[ttlStart:], b[ttlEnd:]) cut := ttlEnd - ttlStart return string(b[:len(b)-cut]) } golang-github-miekg-dns-1.0.4+ds/sanitize_test.go000066400000000000000000000040031325625637500217500ustar00rootroot00000000000000package dns import "testing" func TestDedup(t *testing.T) { testcases := map[[3]RR][]string{ [...]RR{ testRR("mIek.nl. IN A 127.0.0.1"), testRR("mieK.nl. IN A 127.0.0.1"), testRR("miek.Nl. IN A 127.0.0.1"), }: {"mIek.nl.\t3600\tIN\tA\t127.0.0.1"}, [...]RR{ testRR("miEk.nl. 2000 IN A 127.0.0.1"), testRR("mieK.Nl. 1000 IN A 127.0.0.1"), testRR("Miek.nL. 500 IN A 127.0.0.1"), }: {"miEk.nl.\t500\tIN\tA\t127.0.0.1"}, [...]RR{ testRR("miek.nl. IN A 127.0.0.1"), testRR("miek.nl. CH A 127.0.0.1"), testRR("miek.nl. IN A 127.0.0.1"), }: {"miek.nl.\t3600\tIN\tA\t127.0.0.1", "miek.nl.\t3600\tCH\tA\t127.0.0.1", }, [...]RR{ testRR("miek.nl. CH A 127.0.0.1"), testRR("miek.nl. IN A 127.0.0.1"), testRR("miek.de. IN A 127.0.0.1"), }: {"miek.nl.\t3600\tCH\tA\t127.0.0.1", "miek.nl.\t3600\tIN\tA\t127.0.0.1", "miek.de.\t3600\tIN\tA\t127.0.0.1", }, [...]RR{ testRR("miek.de. IN A 127.0.0.1"), testRR("miek.nl. 200 IN A 127.0.0.1"), testRR("miek.nl. 300 IN A 127.0.0.1"), }: {"miek.de.\t3600\tIN\tA\t127.0.0.1", "miek.nl.\t200\tIN\tA\t127.0.0.1", }, } for rr, expected := range testcases { out := Dedup([]RR{rr[0], rr[1], rr[2]}, nil) for i, o := range out { if o.String() != expected[i] { t.Fatalf("expected %v, got %v", expected[i], o.String()) } } } } func BenchmarkDedup(b *testing.B) { rrs := []RR{ testRR("miEk.nl. 2000 IN A 127.0.0.1"), testRR("mieK.Nl. 1000 IN A 127.0.0.1"), testRR("Miek.nL. 500 IN A 127.0.0.1"), } m := make(map[string]RR) for i := 0; i < b.N; i++ { Dedup(rrs, m) } } func TestNormalizedString(t *testing.T) { tests := map[RR]string{ testRR("mIEk.Nl. 3600 IN A 127.0.0.1"): "miek.nl.\tIN\tA\t127.0.0.1", testRR("m\\ iek.nL. 3600 IN A 127.0.0.1"): "m\\ iek.nl.\tIN\tA\t127.0.0.1", testRR("m\\\tIeK.nl. 3600 in A 127.0.0.1"): "m\\009iek.nl.\tIN\tA\t127.0.0.1", } for tc, expected := range tests { n := normalizedString(tc) if n != expected { t.Errorf("expected %s, got %s", expected, n) } } } golang-github-miekg-dns-1.0.4+ds/scan.go000066400000000000000000000572001325625637500200160ustar00rootroot00000000000000package dns import ( "fmt" "io" "os" "path/filepath" "strconv" "strings" ) const maxTok = 2048 // Largest token we can return. const maxUint16 = 1<<16 - 1 // Tokinize a RFC 1035 zone file. The tokenizer will normalize it: // * Add ownernames if they are left blank; // * Suppress sequences of spaces; // * Make each RR fit on one line (_NEWLINE is send as last) // * Handle comments: ; // * Handle braces - anywhere. const ( // Zonefile zEOF = iota zString zBlank zQuote zNewline zRrtpe zOwner zClass zDirOrigin // $ORIGIN zDirTTL // $TTL zDirInclude // $INCLUDE zDirGenerate // $GENERATE // Privatekey file zValue zKey zExpectOwnerDir // Ownername zExpectOwnerBl // Whitespace after the ownername zExpectAny // Expect rrtype, ttl or class zExpectAnyNoClass // Expect rrtype or ttl zExpectAnyNoClassBl // The whitespace after _EXPECT_ANY_NOCLASS zExpectAnyNoTTL // Expect rrtype or class zExpectAnyNoTTLBl // Whitespace after _EXPECT_ANY_NOTTL zExpectRrtype // Expect rrtype zExpectRrtypeBl // Whitespace BEFORE rrtype zExpectRdata // The first element of the rdata zExpectDirTTLBl // Space after directive $TTL zExpectDirTTL // Directive $TTL zExpectDirOriginBl // Space after directive $ORIGIN zExpectDirOrigin // Directive $ORIGIN zExpectDirIncludeBl // Space after directive $INCLUDE zExpectDirInclude // Directive $INCLUDE zExpectDirGenerate // Directive $GENERATE zExpectDirGenerateBl // Space after directive $GENERATE ) // ParseError is a parsing error. It contains the parse error and the location in the io.Reader // where the error occurred. type ParseError struct { file string err string lex lex } func (e *ParseError) Error() (s string) { if e.file != "" { s = e.file + ": " } s += "dns: " + e.err + ": " + strconv.QuoteToASCII(e.lex.token) + " at line: " + strconv.Itoa(e.lex.line) + ":" + strconv.Itoa(e.lex.column) return } type lex struct { token string // text of the token tokenUpper string // uppercase text of the token length int // length of the token err bool // when true, token text has lexer error value uint8 // value: zString, _BLANK, etc. line int // line in the file column int // column in the file torc uint16 // type or class as parsed in the lexer, we only need to look this up in the grammar comment string // any comment text seen } // Token holds the token that are returned when a zone file is parsed. type Token struct { // The scanned resource record when error is not nil. RR // When an error occurred, this has the error specifics. Error *ParseError // A potential comment positioned after the RR and on the same line. Comment string } // ttlState describes the state necessary to fill in an omitted RR TTL type ttlState struct { ttl uint32 // ttl is the current default TTL isByDirective bool // isByDirective indicates whether ttl was set by a $TTL directive } // NewRR reads the RR contained in the string s. Only the first RR is // returned. If s contains no RR, return nil with no error. The class // defaults to IN and TTL defaults to 3600. The full zone file syntax // like $TTL, $ORIGIN, etc. is supported. All fields of the returned // RR are set, except RR.Header().Rdlength which is set to 0. func NewRR(s string) (RR, error) { if len(s) > 0 && s[len(s)-1] != '\n' { // We need a closing newline return ReadRR(strings.NewReader(s+"\n"), "") } return ReadRR(strings.NewReader(s), "") } // ReadRR reads the RR contained in q. // See NewRR for more documentation. func ReadRR(q io.Reader, filename string) (RR, error) { defttl := &ttlState{defaultTtl, false} r := <-parseZoneHelper(q, ".", filename, defttl, 1) if r == nil { return nil, nil } if r.Error != nil { return nil, r.Error } return r.RR, nil } // ParseZone reads a RFC 1035 style zonefile from r. It returns *Tokens on the // returned channel, each consisting of either a parsed RR and optional comment // or a nil RR and an error. The string file is only used // in error reporting. The string origin is used as the initial origin, as // if the file would start with an $ORIGIN directive. // The directives $INCLUDE, $ORIGIN, $TTL and $GENERATE are supported. // The channel t is closed by ParseZone when the end of r is reached. // // Basic usage pattern when reading from a string (z) containing the // zone data: // // for x := range dns.ParseZone(strings.NewReader(z), "", "") { // if x.Error != nil { // // log.Println(x.Error) // } else { // // Do something with x.RR // } // } // // Comments specified after an RR (and on the same line!) are returned too: // // foo. IN A 10.0.0.1 ; this is a comment // // The text "; this is comment" is returned in Token.Comment. Comments inside the // RR are discarded. Comments on a line by themselves are discarded too. func ParseZone(r io.Reader, origin, file string) chan *Token { return parseZoneHelper(r, origin, file, nil, 10000) } func parseZoneHelper(r io.Reader, origin, file string, defttl *ttlState, chansize int) chan *Token { t := make(chan *Token, chansize) go parseZone(r, origin, file, defttl, t, 0) return t } func parseZone(r io.Reader, origin, f string, defttl *ttlState, t chan *Token, include int) { defer func() { if include == 0 { close(t) } }() s, cancel := scanInit(r) c := make(chan lex) // Start the lexer go zlexer(s, c) defer func() { cancel() // zlexer can send up to three tokens, the next one and possibly 2 remainders. // Do a non-blocking read. _, ok := <-c _, ok = <-c _, ok = <-c if !ok { // too bad } }() // 6 possible beginnings of a line, _ is a space // 0. zRRTYPE -> all omitted until the rrtype // 1. zOwner _ zRrtype -> class/ttl omitted // 2. zOwner _ zString _ zRrtype -> class omitted // 3. zOwner _ zString _ zClass _ zRrtype -> ttl/class // 4. zOwner _ zClass _ zRrtype -> ttl omitted // 5. zOwner _ zClass _ zString _ zRrtype -> class/ttl (reversed) // After detecting these, we know the zRrtype so we can jump to functions // handling the rdata for each of these types. if origin != "" { origin = Fqdn(origin) if _, ok := IsDomainName(origin); !ok { t <- &Token{Error: &ParseError{f, "bad initial origin name", lex{}}} return } } st := zExpectOwnerDir // initial state var h RR_Header var prevName string for l := range c { // Lexer spotted an error already if l.err == true { t <- &Token{Error: &ParseError{f, l.token, l}} return } switch st { case zExpectOwnerDir: // We can also expect a directive, like $TTL or $ORIGIN if defttl != nil { h.Ttl = defttl.ttl } h.Class = ClassINET switch l.value { case zNewline: st = zExpectOwnerDir case zOwner: h.Name = l.token name, ok := toAbsoluteName(l.token, origin) if !ok { t <- &Token{Error: &ParseError{f, "bad owner name", l}} return } h.Name = name prevName = h.Name st = zExpectOwnerBl case zDirTTL: st = zExpectDirTTLBl case zDirOrigin: st = zExpectDirOriginBl case zDirInclude: st = zExpectDirIncludeBl case zDirGenerate: st = zExpectDirGenerateBl case zRrtpe: h.Name = prevName h.Rrtype = l.torc st = zExpectRdata case zClass: h.Name = prevName h.Class = l.torc st = zExpectAnyNoClassBl case zBlank: // Discard, can happen when there is nothing on the // line except the RR type case zString: ttl, ok := stringToTTL(l.token) if !ok { t <- &Token{Error: &ParseError{f, "not a TTL", l}} return } h.Ttl = ttl if defttl == nil || !defttl.isByDirective { defttl = &ttlState{ttl, false} } st = zExpectAnyNoTTLBl default: t <- &Token{Error: &ParseError{f, "syntax error at beginning", l}} return } case zExpectDirIncludeBl: if l.value != zBlank { t <- &Token{Error: &ParseError{f, "no blank after $INCLUDE-directive", l}} return } st = zExpectDirInclude case zExpectDirInclude: if l.value != zString { t <- &Token{Error: &ParseError{f, "expecting $INCLUDE value, not this...", l}} return } neworigin := origin // There may be optionally a new origin set after the filename, if not use current one switch l := <-c; l.value { case zBlank: l := <-c if l.value == zString { name, ok := toAbsoluteName(l.token, origin) if !ok { t <- &Token{Error: &ParseError{f, "bad origin name", l}} return } neworigin = name } case zNewline, zEOF: // Ok default: t <- &Token{Error: &ParseError{f, "garbage after $INCLUDE", l}} return } // Start with the new file includePath := l.token if !filepath.IsAbs(includePath) { includePath = filepath.Join(filepath.Dir(f), includePath) } r1, e1 := os.Open(includePath) if e1 != nil { msg := fmt.Sprintf("failed to open `%s'", l.token) if !filepath.IsAbs(l.token) { msg += fmt.Sprintf(" as `%s'", includePath) } t <- &Token{Error: &ParseError{f, msg, l}} return } if include+1 > 7 { t <- &Token{Error: &ParseError{f, "too deeply nested $INCLUDE", l}} return } parseZone(r1, neworigin, includePath, defttl, t, include+1) st = zExpectOwnerDir case zExpectDirTTLBl: if l.value != zBlank { t <- &Token{Error: &ParseError{f, "no blank after $TTL-directive", l}} return } st = zExpectDirTTL case zExpectDirTTL: if l.value != zString { t <- &Token{Error: &ParseError{f, "expecting $TTL value, not this...", l}} return } if e, _ := slurpRemainder(c, f); e != nil { t <- &Token{Error: e} return } ttl, ok := stringToTTL(l.token) if !ok { t <- &Token{Error: &ParseError{f, "expecting $TTL value, not this...", l}} return } defttl = &ttlState{ttl, true} st = zExpectOwnerDir case zExpectDirOriginBl: if l.value != zBlank { t <- &Token{Error: &ParseError{f, "no blank after $ORIGIN-directive", l}} return } st = zExpectDirOrigin case zExpectDirOrigin: if l.value != zString { t <- &Token{Error: &ParseError{f, "expecting $ORIGIN value, not this...", l}} return } if e, _ := slurpRemainder(c, f); e != nil { t <- &Token{Error: e} } name, ok := toAbsoluteName(l.token, origin) if !ok { t <- &Token{Error: &ParseError{f, "bad origin name", l}} return } origin = name st = zExpectOwnerDir case zExpectDirGenerateBl: if l.value != zBlank { t <- &Token{Error: &ParseError{f, "no blank after $GENERATE-directive", l}} return } st = zExpectDirGenerate case zExpectDirGenerate: if l.value != zString { t <- &Token{Error: &ParseError{f, "expecting $GENERATE value, not this...", l}} return } if errMsg := generate(l, c, t, origin); errMsg != "" { t <- &Token{Error: &ParseError{f, errMsg, l}} return } st = zExpectOwnerDir case zExpectOwnerBl: if l.value != zBlank { t <- &Token{Error: &ParseError{f, "no blank after owner", l}} return } st = zExpectAny case zExpectAny: switch l.value { case zRrtpe: if defttl == nil { t <- &Token{Error: &ParseError{f, "missing TTL with no previous value", l}} return } h.Rrtype = l.torc st = zExpectRdata case zClass: h.Class = l.torc st = zExpectAnyNoClassBl case zString: ttl, ok := stringToTTL(l.token) if !ok { t <- &Token{Error: &ParseError{f, "not a TTL", l}} return } h.Ttl = ttl if defttl == nil || !defttl.isByDirective { defttl = &ttlState{ttl, false} } st = zExpectAnyNoTTLBl default: t <- &Token{Error: &ParseError{f, "expecting RR type, TTL or class, not this...", l}} return } case zExpectAnyNoClassBl: if l.value != zBlank { t <- &Token{Error: &ParseError{f, "no blank before class", l}} return } st = zExpectAnyNoClass case zExpectAnyNoTTLBl: if l.value != zBlank { t <- &Token{Error: &ParseError{f, "no blank before TTL", l}} return } st = zExpectAnyNoTTL case zExpectAnyNoTTL: switch l.value { case zClass: h.Class = l.torc st = zExpectRrtypeBl case zRrtpe: h.Rrtype = l.torc st = zExpectRdata default: t <- &Token{Error: &ParseError{f, "expecting RR type or class, not this...", l}} return } case zExpectAnyNoClass: switch l.value { case zString: ttl, ok := stringToTTL(l.token) if !ok { t <- &Token{Error: &ParseError{f, "not a TTL", l}} return } h.Ttl = ttl if defttl == nil || !defttl.isByDirective { defttl = &ttlState{ttl, false} } st = zExpectRrtypeBl case zRrtpe: h.Rrtype = l.torc st = zExpectRdata default: t <- &Token{Error: &ParseError{f, "expecting RR type or TTL, not this...", l}} return } case zExpectRrtypeBl: if l.value != zBlank { t <- &Token{Error: &ParseError{f, "no blank before RR type", l}} return } st = zExpectRrtype case zExpectRrtype: if l.value != zRrtpe { t <- &Token{Error: &ParseError{f, "unknown RR type", l}} return } h.Rrtype = l.torc st = zExpectRdata case zExpectRdata: r, e, c1 := setRR(h, c, origin, f) if e != nil { // If e.lex is nil than we have encounter a unknown RR type // in that case we substitute our current lex token if e.lex.token == "" && e.lex.value == 0 { e.lex = l // Uh, dirty } t <- &Token{Error: e} return } t <- &Token{RR: r, Comment: c1} st = zExpectOwnerDir } } // If we get here, we and the h.Rrtype is still zero, we haven't parsed anything, this // is not an error, because an empty zone file is still a zone file. } // zlexer scans the sourcefile and returns tokens on the channel c. func zlexer(s *scan, c chan lex) { var l lex str := make([]byte, maxTok) // Should be enough for any token stri := 0 // Offset in str (0 means empty) com := make([]byte, maxTok) // Hold comment text comi := 0 quote := false escape := false space := false commt := false rrtype := false owner := true brace := 0 x, err := s.tokenText() defer close(c) for err == nil { l.column = s.position.Column l.line = s.position.Line if stri >= maxTok { l.token = "token length insufficient for parsing" l.err = true c <- l return } if comi >= maxTok { l.token = "comment length insufficient for parsing" l.err = true c <- l return } switch x { case ' ', '\t': if escape { escape = false str[stri] = x stri++ break } if quote { // Inside quotes this is legal str[stri] = x stri++ break } if commt { com[comi] = x comi++ break } if stri == 0 { // Space directly in the beginning, handled in the grammar } else if owner { // If we have a string and its the first, make it an owner l.value = zOwner l.token = string(str[:stri]) l.tokenUpper = strings.ToUpper(l.token) l.length = stri // escape $... start with a \ not a $, so this will work switch l.tokenUpper { case "$TTL": l.value = zDirTTL case "$ORIGIN": l.value = zDirOrigin case "$INCLUDE": l.value = zDirInclude case "$GENERATE": l.value = zDirGenerate } c <- l } else { l.value = zString l.token = string(str[:stri]) l.tokenUpper = strings.ToUpper(l.token) l.length = stri if !rrtype { if t, ok := StringToType[l.tokenUpper]; ok { l.value = zRrtpe l.torc = t rrtype = true } else { if strings.HasPrefix(l.tokenUpper, "TYPE") { t, ok := typeToInt(l.token) if !ok { l.token = "unknown RR type" l.err = true c <- l return } l.value = zRrtpe rrtype = true l.torc = t } } if t, ok := StringToClass[l.tokenUpper]; ok { l.value = zClass l.torc = t } else { if strings.HasPrefix(l.tokenUpper, "CLASS") { t, ok := classToInt(l.token) if !ok { l.token = "unknown class" l.err = true c <- l return } l.value = zClass l.torc = t } } } c <- l } stri = 0 if !space && !commt { l.value = zBlank l.token = " " l.length = 1 c <- l } owner = false space = true case ';': if escape { escape = false str[stri] = x stri++ break } if quote { // Inside quotes this is legal str[stri] = x stri++ break } if stri > 0 { l.value = zString l.token = string(str[:stri]) l.tokenUpper = strings.ToUpper(l.token) l.length = stri c <- l stri = 0 } commt = true com[comi] = ';' comi++ case '\r': escape = false if quote { str[stri] = x stri++ break } // discard if outside of quotes case '\n': escape = false // Escaped newline if quote { str[stri] = x stri++ break } // inside quotes this is legal if commt { // Reset a comment commt = false rrtype = false stri = 0 // If not in a brace this ends the comment AND the RR if brace == 0 { owner = true owner = true l.value = zNewline l.token = "\n" l.tokenUpper = l.token l.length = 1 l.comment = string(com[:comi]) c <- l l.comment = "" comi = 0 break } com[comi] = ' ' // convert newline to space comi++ break } if brace == 0 { // If there is previous text, we should output it here if stri != 0 { l.value = zString l.token = string(str[:stri]) l.tokenUpper = strings.ToUpper(l.token) l.length = stri if !rrtype { if t, ok := StringToType[l.tokenUpper]; ok { l.value = zRrtpe l.torc = t rrtype = true } } c <- l } l.value = zNewline l.token = "\n" l.tokenUpper = l.token l.length = 1 c <- l stri = 0 commt = false rrtype = false owner = true comi = 0 } case '\\': // comments do not get escaped chars, everything is copied if commt { com[comi] = x comi++ break } // something already escaped must be in string if escape { str[stri] = x stri++ escape = false break } // something escaped outside of string gets added to string str[stri] = x stri++ escape = true case '"': if commt { com[comi] = x comi++ break } if escape { str[stri] = x stri++ escape = false break } space = false // send previous gathered text and the quote if stri != 0 { l.value = zString l.token = string(str[:stri]) l.tokenUpper = strings.ToUpper(l.token) l.length = stri c <- l stri = 0 } // send quote itself as separate token l.value = zQuote l.token = "\"" l.tokenUpper = l.token l.length = 1 c <- l quote = !quote case '(', ')': if commt { com[comi] = x comi++ break } if escape { str[stri] = x stri++ escape = false break } if quote { str[stri] = x stri++ break } switch x { case ')': brace-- if brace < 0 { l.token = "extra closing brace" l.tokenUpper = l.token l.err = true c <- l return } case '(': brace++ } default: escape = false if commt { com[comi] = x comi++ break } str[stri] = x stri++ space = false } x, err = s.tokenText() } if stri > 0 { // Send remainder l.token = string(str[:stri]) l.tokenUpper = strings.ToUpper(l.token) l.length = stri l.value = zString c <- l } if brace != 0 { l.token = "unbalanced brace" l.tokenUpper = l.token l.err = true c <- l } } // Extract the class number from CLASSxx func classToInt(token string) (uint16, bool) { offset := 5 if len(token) < offset+1 { return 0, false } class, err := strconv.ParseUint(token[offset:], 10, 16) if err != nil { return 0, false } return uint16(class), true } // Extract the rr number from TYPExxx func typeToInt(token string) (uint16, bool) { offset := 4 if len(token) < offset+1 { return 0, false } typ, err := strconv.ParseUint(token[offset:], 10, 16) if err != nil { return 0, false } return uint16(typ), true } // stringToTTL parses things like 2w, 2m, etc, and returns the time in seconds. func stringToTTL(token string) (uint32, bool) { s := uint32(0) i := uint32(0) for _, c := range token { switch c { case 's', 'S': s += i i = 0 case 'm', 'M': s += i * 60 i = 0 case 'h', 'H': s += i * 60 * 60 i = 0 case 'd', 'D': s += i * 60 * 60 * 24 i = 0 case 'w', 'W': s += i * 60 * 60 * 24 * 7 i = 0 case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': i *= 10 i += uint32(c) - '0' default: return 0, false } } return s + i, true } // Parse LOC records' [.][mM] into a // mantissa exponent format. Token should contain the entire // string (i.e. no spaces allowed) func stringToCm(token string) (e, m uint8, ok bool) { if token[len(token)-1] == 'M' || token[len(token)-1] == 'm' { token = token[0 : len(token)-1] } s := strings.SplitN(token, ".", 2) var meters, cmeters, val int var err error switch len(s) { case 2: if cmeters, err = strconv.Atoi(s[1]); err != nil { return } fallthrough case 1: if meters, err = strconv.Atoi(s[0]); err != nil { return } case 0: // huh? return 0, 0, false } ok = true if meters > 0 { e = 2 val = meters } else { e = 0 val = cmeters } for val > 10 { e++ val /= 10 } if e > 9 { ok = false } m = uint8(val) return } func toAbsoluteName(name, origin string) (absolute string, ok bool) { // check for an explicit origin reference if name == "@" { // require a nonempty origin if origin == "" { return "", false } return origin, true } // require a valid domain name _, ok = IsDomainName(name) if !ok || name == "" { return "", false } // check if name is already absolute if name[len(name)-1] == '.' { return name, true } // require a nonempty origin if origin == "" { return "", false } return appendOrigin(name, origin), true } func appendOrigin(name, origin string) string { if origin == "." { return name + origin } return name + "." + origin } // LOC record helper function func locCheckNorth(token string, latitude uint32) (uint32, bool) { switch token { case "n", "N": return LOC_EQUATOR + latitude, true case "s", "S": return LOC_EQUATOR - latitude, true } return latitude, false } // LOC record helper function func locCheckEast(token string, longitude uint32) (uint32, bool) { switch token { case "e", "E": return LOC_EQUATOR + longitude, true case "w", "W": return LOC_EQUATOR - longitude, true } return longitude, false } // "Eat" the rest of the "line". Return potential comments func slurpRemainder(c chan lex, f string) (*ParseError, string) { l := <-c com := "" switch l.value { case zBlank: l = <-c com = l.comment if l.value != zNewline && l.value != zEOF { return &ParseError{f, "garbage after rdata", l}, "" } case zNewline: com = l.comment case zEOF: default: return &ParseError{f, "garbage after rdata", l}, "" } return nil, com } // Parse a 64 bit-like ipv6 address: "0014:4fff:ff20:ee64" // Used for NID and L64 record. func stringToNodeID(l lex) (uint64, *ParseError) { if len(l.token) < 19 { return 0, &ParseError{l.token, "bad NID/L64 NodeID/Locator64", l} } // There must be three colons at fixes postitions, if not its a parse error if l.token[4] != ':' && l.token[9] != ':' && l.token[14] != ':' { return 0, &ParseError{l.token, "bad NID/L64 NodeID/Locator64", l} } s := l.token[0:4] + l.token[5:9] + l.token[10:14] + l.token[15:19] u, err := strconv.ParseUint(s, 16, 64) if err != nil { return 0, &ParseError{l.token, "bad NID/L64 NodeID/Locator64", l} } return u, nil } golang-github-miekg-dns-1.0.4+ds/scan_rr.go000066400000000000000000001410741325625637500205240ustar00rootroot00000000000000package dns import ( "encoding/base64" "net" "strconv" "strings" ) type parserFunc struct { // Func defines the function that parses the tokens and returns the RR // or an error. The last string contains any comments in the line as // they returned by the lexer as well. Func func(h RR_Header, c chan lex, origin string, file string) (RR, *ParseError, string) // Signals if the RR ending is of variable length, like TXT or records // that have Hexadecimal or Base64 as their last element in the Rdata. Records // that have a fixed ending or for instance A, AAAA, SOA and etc. Variable bool } // Parse the rdata of each rrtype. // All data from the channel c is either zString or zBlank. // After the rdata there may come a zBlank and then a zNewline // or immediately a zNewline. If this is not the case we flag // an *ParseError: garbage after rdata. func setRR(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { parserfunc, ok := typeToparserFunc[h.Rrtype] if ok { r, e, cm := parserfunc.Func(h, c, o, f) if parserfunc.Variable { return r, e, cm } if e != nil { return nil, e, "" } e, cm = slurpRemainder(c, f) if e != nil { return nil, e, "" } return r, nil, cm } // RFC3957 RR (Unknown RR handling) return setRFC3597(h, c, o, f) } // A remainder of the rdata with embedded spaces, return the parsed string (sans the spaces) // or an error func endingToString(c chan lex, errstr, f string) (string, *ParseError, string) { s := "" l := <-c // zString for l.value != zNewline && l.value != zEOF { if l.err { return s, &ParseError{f, errstr, l}, "" } switch l.value { case zString: s += l.token case zBlank: // Ok default: return "", &ParseError{f, errstr, l}, "" } l = <-c } return s, nil, l.comment } // A remainder of the rdata with embedded spaces, split on unquoted whitespace // and return the parsed string slice or an error func endingToTxtSlice(c chan lex, errstr, f string) ([]string, *ParseError, string) { // Get the remaining data until we see a zNewline l := <-c if l.err { return nil, &ParseError{f, errstr, l}, "" } // Build the slice s := make([]string, 0) quote := false empty := false for l.value != zNewline && l.value != zEOF { if l.err { return nil, &ParseError{f, errstr, l}, "" } switch l.value { case zString: empty = false if len(l.token) > 255 { // split up tokens that are larger than 255 into 255-chunks sx := []string{} p, i := 0, 255 for { if i <= len(l.token) { sx = append(sx, l.token[p:i]) } else { sx = append(sx, l.token[p:]) break } p, i = p+255, i+255 } s = append(s, sx...) break } s = append(s, l.token) case zBlank: if quote { // zBlank can only be seen in between txt parts. return nil, &ParseError{f, errstr, l}, "" } case zQuote: if empty && quote { s = append(s, "") } quote = !quote empty = true default: return nil, &ParseError{f, errstr, l}, "" } l = <-c } if quote { return nil, &ParseError{f, errstr, l}, "" } return s, nil, l.comment } func setA(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(A) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } rr.A = net.ParseIP(l.token) if rr.A == nil || l.err { return nil, &ParseError{f, "bad A A", l}, "" } return rr, nil, "" } func setAAAA(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(AAAA) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } rr.AAAA = net.ParseIP(l.token) if rr.AAAA == nil || l.err { return nil, &ParseError{f, "bad AAAA AAAA", l}, "" } return rr, nil, "" } func setNS(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(NS) rr.Hdr = h l := <-c rr.Ns = l.token if l.length == 0 { // dynamic update rr. return rr, nil, "" } name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad NS Ns", l}, "" } rr.Ns = name return rr, nil, "" } func setPTR(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(PTR) rr.Hdr = h l := <-c rr.Ptr = l.token if l.length == 0 { // dynamic update rr. return rr, nil, "" } name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad PTR Ptr", l}, "" } rr.Ptr = name return rr, nil, "" } func setNSAPPTR(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(NSAPPTR) rr.Hdr = h l := <-c rr.Ptr = l.token if l.length == 0 { // dynamic update rr. return rr, nil, "" } name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad NSAP-PTR Ptr", l}, "" } rr.Ptr = name return rr, nil, "" } func setRP(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(RP) rr.Hdr = h l := <-c rr.Mbox = l.token if l.length == 0 { // dynamic update rr. return rr, nil, "" } mbox, mboxOk := toAbsoluteName(l.token, o) if l.err || !mboxOk { return nil, &ParseError{f, "bad RP Mbox", l}, "" } rr.Mbox = mbox <-c // zBlank l = <-c rr.Txt = l.token txt, txtOk := toAbsoluteName(l.token, o) if l.err || !txtOk { return nil, &ParseError{f, "bad RP Txt", l}, "" } rr.Txt = txt return rr, nil, "" } func setMR(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(MR) rr.Hdr = h l := <-c rr.Mr = l.token if l.length == 0 { // dynamic update rr. return rr, nil, "" } name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad MR Mr", l}, "" } rr.Mr = name return rr, nil, "" } func setMB(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(MB) rr.Hdr = h l := <-c rr.Mb = l.token if l.length == 0 { // dynamic update rr. return rr, nil, "" } name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad MB Mb", l}, "" } rr.Mb = name return rr, nil, "" } func setMG(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(MG) rr.Hdr = h l := <-c rr.Mg = l.token if l.length == 0 { // dynamic update rr. return rr, nil, "" } name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad MG Mg", l}, "" } rr.Mg = name return rr, nil, "" } func setHINFO(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(HINFO) rr.Hdr = h chunks, e, c1 := endingToTxtSlice(c, "bad HINFO Fields", f) if e != nil { return nil, e, c1 } if ln := len(chunks); ln == 0 { return rr, nil, "" } else if ln == 1 { // Can we split it? if out := strings.Fields(chunks[0]); len(out) > 1 { chunks = out } else { chunks = append(chunks, "") } } rr.Cpu = chunks[0] rr.Os = strings.Join(chunks[1:], " ") return rr, nil, "" } func setMINFO(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(MINFO) rr.Hdr = h l := <-c rr.Rmail = l.token if l.length == 0 { // dynamic update rr. return rr, nil, "" } rmail, rmailOk := toAbsoluteName(l.token, o) if l.err || !rmailOk { return nil, &ParseError{f, "bad MINFO Rmail", l}, "" } rr.Rmail = rmail <-c // zBlank l = <-c rr.Email = l.token email, emailOk := toAbsoluteName(l.token, o) if l.err || !emailOk { return nil, &ParseError{f, "bad MINFO Email", l}, "" } rr.Email = email return rr, nil, "" } func setMF(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(MF) rr.Hdr = h l := <-c rr.Mf = l.token if l.length == 0 { // dynamic update rr. return rr, nil, "" } name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad MF Mf", l}, "" } rr.Mf = name return rr, nil, "" } func setMD(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(MD) rr.Hdr = h l := <-c rr.Md = l.token if l.length == 0 { // dynamic update rr. return rr, nil, "" } name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad MD Md", l}, "" } rr.Md = name return rr, nil, "" } func setMX(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(MX) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad MX Pref", l}, "" } rr.Preference = uint16(i) <-c // zBlank l = <-c // zString rr.Mx = l.token name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad MX Mx", l}, "" } rr.Mx = name return rr, nil, "" } func setRT(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(RT) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil { return nil, &ParseError{f, "bad RT Preference", l}, "" } rr.Preference = uint16(i) <-c // zBlank l = <-c // zString rr.Host = l.token name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad RT Host", l}, "" } rr.Host = name return rr, nil, "" } func setAFSDB(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(AFSDB) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad AFSDB Subtype", l}, "" } rr.Subtype = uint16(i) <-c // zBlank l = <-c // zString rr.Hostname = l.token name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad AFSDB Hostname", l}, "" } rr.Hostname = name return rr, nil, "" } func setX25(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(X25) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } if l.err { return nil, &ParseError{f, "bad X25 PSDNAddress", l}, "" } rr.PSDNAddress = l.token return rr, nil, "" } func setKX(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(KX) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad KX Pref", l}, "" } rr.Preference = uint16(i) <-c // zBlank l = <-c // zString rr.Exchanger = l.token name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad KX Exchanger", l}, "" } rr.Exchanger = name return rr, nil, "" } func setCNAME(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(CNAME) rr.Hdr = h l := <-c rr.Target = l.token if l.length == 0 { // dynamic update rr. return rr, nil, "" } name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad CNAME Target", l}, "" } rr.Target = name return rr, nil, "" } func setDNAME(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(DNAME) rr.Hdr = h l := <-c rr.Target = l.token if l.length == 0 { // dynamic update rr. return rr, nil, "" } name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad DNAME Target", l}, "" } rr.Target = name return rr, nil, "" } func setSOA(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(SOA) rr.Hdr = h l := <-c rr.Ns = l.token if l.length == 0 { // dynamic update rr. return rr, nil, "" } ns, nsOk := toAbsoluteName(l.token, o) if l.err || !nsOk { return nil, &ParseError{f, "bad SOA Ns", l}, "" } rr.Ns = ns <-c // zBlank l = <-c rr.Mbox = l.token mbox, mboxOk := toAbsoluteName(l.token, o) if l.err || !mboxOk { return nil, &ParseError{f, "bad SOA Mbox", l}, "" } rr.Mbox = mbox <-c // zBlank var ( v uint32 ok bool ) for i := 0; i < 5; i++ { l = <-c if l.err { return nil, &ParseError{f, "bad SOA zone parameter", l}, "" } if j, e := strconv.ParseUint(l.token, 10, 32); e != nil { if i == 0 { // Serial must be a number return nil, &ParseError{f, "bad SOA zone parameter", l}, "" } // We allow other fields to be unitful duration strings if v, ok = stringToTTL(l.token); !ok { return nil, &ParseError{f, "bad SOA zone parameter", l}, "" } } else { v = uint32(j) } switch i { case 0: rr.Serial = v <-c // zBlank case 1: rr.Refresh = v <-c // zBlank case 2: rr.Retry = v <-c // zBlank case 3: rr.Expire = v <-c // zBlank case 4: rr.Minttl = v } } return rr, nil, "" } func setSRV(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(SRV) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad SRV Priority", l}, "" } rr.Priority = uint16(i) <-c // zBlank l = <-c // zString i, e = strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad SRV Weight", l}, "" } rr.Weight = uint16(i) <-c // zBlank l = <-c // zString i, e = strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad SRV Port", l}, "" } rr.Port = uint16(i) <-c // zBlank l = <-c // zString rr.Target = l.token name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad SRV Target", l}, "" } rr.Target = name return rr, nil, "" } func setNAPTR(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(NAPTR) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad NAPTR Order", l}, "" } rr.Order = uint16(i) <-c // zBlank l = <-c // zString i, e = strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad NAPTR Preference", l}, "" } rr.Preference = uint16(i) // Flags <-c // zBlank l = <-c // _QUOTE if l.value != zQuote { return nil, &ParseError{f, "bad NAPTR Flags", l}, "" } l = <-c // Either String or Quote if l.value == zString { rr.Flags = l.token l = <-c // _QUOTE if l.value != zQuote { return nil, &ParseError{f, "bad NAPTR Flags", l}, "" } } else if l.value == zQuote { rr.Flags = "" } else { return nil, &ParseError{f, "bad NAPTR Flags", l}, "" } // Service <-c // zBlank l = <-c // _QUOTE if l.value != zQuote { return nil, &ParseError{f, "bad NAPTR Service", l}, "" } l = <-c // Either String or Quote if l.value == zString { rr.Service = l.token l = <-c // _QUOTE if l.value != zQuote { return nil, &ParseError{f, "bad NAPTR Service", l}, "" } } else if l.value == zQuote { rr.Service = "" } else { return nil, &ParseError{f, "bad NAPTR Service", l}, "" } // Regexp <-c // zBlank l = <-c // _QUOTE if l.value != zQuote { return nil, &ParseError{f, "bad NAPTR Regexp", l}, "" } l = <-c // Either String or Quote if l.value == zString { rr.Regexp = l.token l = <-c // _QUOTE if l.value != zQuote { return nil, &ParseError{f, "bad NAPTR Regexp", l}, "" } } else if l.value == zQuote { rr.Regexp = "" } else { return nil, &ParseError{f, "bad NAPTR Regexp", l}, "" } // After quote no space?? <-c // zBlank l = <-c // zString rr.Replacement = l.token name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad NAPTR Replacement", l}, "" } rr.Replacement = name return rr, nil, "" } func setTALINK(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(TALINK) rr.Hdr = h l := <-c rr.PreviousName = l.token if l.length == 0 { // dynamic update rr. return rr, nil, "" } previousName, previousNameOk := toAbsoluteName(l.token, o) if l.err || !previousNameOk { return nil, &ParseError{f, "bad TALINK PreviousName", l}, "" } rr.PreviousName = previousName <-c // zBlank l = <-c rr.NextName = l.token nextName, nextNameOk := toAbsoluteName(l.token, o) if l.err || !nextNameOk { return nil, &ParseError{f, "bad TALINK NextName", l}, "" } rr.NextName = nextName return rr, nil, "" } func setLOC(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(LOC) rr.Hdr = h // Non zero defaults for LOC record, see RFC 1876, Section 3. rr.HorizPre = 165 // 10000 rr.VertPre = 162 // 10 rr.Size = 18 // 1 ok := false // North l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 32) if e != nil || l.err { return nil, &ParseError{f, "bad LOC Latitude", l}, "" } rr.Latitude = 1000 * 60 * 60 * uint32(i) <-c // zBlank // Either number, 'N' or 'S' l = <-c if rr.Latitude, ok = locCheckNorth(l.token, rr.Latitude); ok { goto East } i, e = strconv.ParseUint(l.token, 10, 32) if e != nil || l.err { return nil, &ParseError{f, "bad LOC Latitude minutes", l}, "" } rr.Latitude += 1000 * 60 * uint32(i) <-c // zBlank l = <-c if i, e := strconv.ParseFloat(l.token, 32); e != nil || l.err { return nil, &ParseError{f, "bad LOC Latitude seconds", l}, "" } else { rr.Latitude += uint32(1000 * i) } <-c // zBlank // Either number, 'N' or 'S' l = <-c if rr.Latitude, ok = locCheckNorth(l.token, rr.Latitude); ok { goto East } // If still alive, flag an error return nil, &ParseError{f, "bad LOC Latitude North/South", l}, "" East: // East <-c // zBlank l = <-c if i, e := strconv.ParseUint(l.token, 10, 32); e != nil || l.err { return nil, &ParseError{f, "bad LOC Longitude", l}, "" } else { rr.Longitude = 1000 * 60 * 60 * uint32(i) } <-c // zBlank // Either number, 'E' or 'W' l = <-c if rr.Longitude, ok = locCheckEast(l.token, rr.Longitude); ok { goto Altitude } if i, e := strconv.ParseUint(l.token, 10, 32); e != nil || l.err { return nil, &ParseError{f, "bad LOC Longitude minutes", l}, "" } else { rr.Longitude += 1000 * 60 * uint32(i) } <-c // zBlank l = <-c if i, e := strconv.ParseFloat(l.token, 32); e != nil || l.err { return nil, &ParseError{f, "bad LOC Longitude seconds", l}, "" } else { rr.Longitude += uint32(1000 * i) } <-c // zBlank // Either number, 'E' or 'W' l = <-c if rr.Longitude, ok = locCheckEast(l.token, rr.Longitude); ok { goto Altitude } // If still alive, flag an error return nil, &ParseError{f, "bad LOC Longitude East/West", l}, "" Altitude: <-c // zBlank l = <-c if l.length == 0 || l.err { return nil, &ParseError{f, "bad LOC Altitude", l}, "" } if l.token[len(l.token)-1] == 'M' || l.token[len(l.token)-1] == 'm' { l.token = l.token[0 : len(l.token)-1] } if i, e := strconv.ParseFloat(l.token, 32); e != nil { return nil, &ParseError{f, "bad LOC Altitude", l}, "" } else { rr.Altitude = uint32(i*100.0 + 10000000.0 + 0.5) } // And now optionally the other values l = <-c count := 0 for l.value != zNewline && l.value != zEOF { switch l.value { case zString: switch count { case 0: // Size e, m, ok := stringToCm(l.token) if !ok { return nil, &ParseError{f, "bad LOC Size", l}, "" } rr.Size = (e & 0x0f) | (m << 4 & 0xf0) case 1: // HorizPre e, m, ok := stringToCm(l.token) if !ok { return nil, &ParseError{f, "bad LOC HorizPre", l}, "" } rr.HorizPre = (e & 0x0f) | (m << 4 & 0xf0) case 2: // VertPre e, m, ok := stringToCm(l.token) if !ok { return nil, &ParseError{f, "bad LOC VertPre", l}, "" } rr.VertPre = (e & 0x0f) | (m << 4 & 0xf0) } count++ case zBlank: // Ok default: return nil, &ParseError{f, "bad LOC Size, HorizPre or VertPre", l}, "" } l = <-c } return rr, nil, "" } func setHIP(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(HIP) rr.Hdr = h // HitLength is not represented l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, l.comment } i, e := strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad HIP PublicKeyAlgorithm", l}, "" } rr.PublicKeyAlgorithm = uint8(i) <-c // zBlank l = <-c // zString if l.length == 0 || l.err { return nil, &ParseError{f, "bad HIP Hit", l}, "" } rr.Hit = l.token // This can not contain spaces, see RFC 5205 Section 6. rr.HitLength = uint8(len(rr.Hit)) / 2 <-c // zBlank l = <-c // zString if l.length == 0 || l.err { return nil, &ParseError{f, "bad HIP PublicKey", l}, "" } rr.PublicKey = l.token // This cannot contain spaces rr.PublicKeyLength = uint16(base64.StdEncoding.DecodedLen(len(rr.PublicKey))) // RendezvousServers (if any) l = <-c var xs []string for l.value != zNewline && l.value != zEOF { switch l.value { case zString: name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad HIP RendezvousServers", l}, "" } xs = append(xs, name) case zBlank: // Ok default: return nil, &ParseError{f, "bad HIP RendezvousServers", l}, "" } l = <-c } rr.RendezvousServers = xs return rr, nil, l.comment } func setCERT(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(CERT) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, l.comment } if v, ok := StringToCertType[l.token]; ok { rr.Type = v } else if i, e := strconv.ParseUint(l.token, 10, 16); e != nil { return nil, &ParseError{f, "bad CERT Type", l}, "" } else { rr.Type = uint16(i) } <-c // zBlank l = <-c // zString i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad CERT KeyTag", l}, "" } rr.KeyTag = uint16(i) <-c // zBlank l = <-c // zString if v, ok := StringToAlgorithm[l.token]; ok { rr.Algorithm = v } else if i, e := strconv.ParseUint(l.token, 10, 8); e != nil { return nil, &ParseError{f, "bad CERT Algorithm", l}, "" } else { rr.Algorithm = uint8(i) } s, e1, c1 := endingToString(c, "bad CERT Certificate", f) if e1 != nil { return nil, e1, c1 } rr.Certificate = s return rr, nil, c1 } func setOPENPGPKEY(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(OPENPGPKEY) rr.Hdr = h s, e, c1 := endingToString(c, "bad OPENPGPKEY PublicKey", f) if e != nil { return nil, e, c1 } rr.PublicKey = s return rr, nil, c1 } func setCSYNC(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(CSYNC) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, l.comment } j, e := strconv.ParseUint(l.token, 10, 32) if e != nil { // Serial must be a number return nil, &ParseError{f, "bad CSYNC serial", l}, "" } rr.Serial = uint32(j) <-c // zBlank l = <-c j, e = strconv.ParseUint(l.token, 10, 16) if e != nil { // Serial must be a number return nil, &ParseError{f, "bad CSYNC flags", l}, "" } rr.Flags = uint16(j) rr.TypeBitMap = make([]uint16, 0) var ( k uint16 ok bool ) l = <-c for l.value != zNewline && l.value != zEOF { switch l.value { case zBlank: // Ok case zString: if k, ok = StringToType[l.tokenUpper]; !ok { if k, ok = typeToInt(l.tokenUpper); !ok { return nil, &ParseError{f, "bad CSYNC TypeBitMap", l}, "" } } rr.TypeBitMap = append(rr.TypeBitMap, k) default: return nil, &ParseError{f, "bad CSYNC TypeBitMap", l}, "" } l = <-c } return rr, nil, l.comment } func setSIG(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { r, e, s := setRRSIG(h, c, o, f) if r != nil { return &SIG{*r.(*RRSIG)}, e, s } return nil, e, s } func setRRSIG(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(RRSIG) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, l.comment } if t, ok := StringToType[l.tokenUpper]; !ok { if strings.HasPrefix(l.tokenUpper, "TYPE") { t, ok = typeToInt(l.tokenUpper) if !ok { return nil, &ParseError{f, "bad RRSIG Typecovered", l}, "" } rr.TypeCovered = t } else { return nil, &ParseError{f, "bad RRSIG Typecovered", l}, "" } } else { rr.TypeCovered = t } <-c // zBlank l = <-c i, err := strconv.ParseUint(l.token, 10, 8) if err != nil || l.err { return nil, &ParseError{f, "bad RRSIG Algorithm", l}, "" } rr.Algorithm = uint8(i) <-c // zBlank l = <-c i, err = strconv.ParseUint(l.token, 10, 8) if err != nil || l.err { return nil, &ParseError{f, "bad RRSIG Labels", l}, "" } rr.Labels = uint8(i) <-c // zBlank l = <-c i, err = strconv.ParseUint(l.token, 10, 32) if err != nil || l.err { return nil, &ParseError{f, "bad RRSIG OrigTtl", l}, "" } rr.OrigTtl = uint32(i) <-c // zBlank l = <-c if i, err := StringToTime(l.token); err != nil { // Try to see if all numeric and use it as epoch if i, err := strconv.ParseInt(l.token, 10, 64); err == nil { // TODO(miek): error out on > MAX_UINT32, same below rr.Expiration = uint32(i) } else { return nil, &ParseError{f, "bad RRSIG Expiration", l}, "" } } else { rr.Expiration = i } <-c // zBlank l = <-c if i, err := StringToTime(l.token); err != nil { if i, err := strconv.ParseInt(l.token, 10, 64); err == nil { rr.Inception = uint32(i) } else { return nil, &ParseError{f, "bad RRSIG Inception", l}, "" } } else { rr.Inception = i } <-c // zBlank l = <-c i, err = strconv.ParseUint(l.token, 10, 16) if err != nil || l.err { return nil, &ParseError{f, "bad RRSIG KeyTag", l}, "" } rr.KeyTag = uint16(i) <-c // zBlank l = <-c rr.SignerName = l.token name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad RRSIG SignerName", l}, "" } rr.SignerName = name s, e, c1 := endingToString(c, "bad RRSIG Signature", f) if e != nil { return nil, e, c1 } rr.Signature = s return rr, nil, c1 } func setNSEC(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(NSEC) rr.Hdr = h l := <-c rr.NextDomain = l.token if l.length == 0 { // dynamic update rr. return rr, nil, l.comment } name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad NSEC NextDomain", l}, "" } rr.NextDomain = name rr.TypeBitMap = make([]uint16, 0) var ( k uint16 ok bool ) l = <-c for l.value != zNewline && l.value != zEOF { switch l.value { case zBlank: // Ok case zString: if k, ok = StringToType[l.tokenUpper]; !ok { if k, ok = typeToInt(l.tokenUpper); !ok { return nil, &ParseError{f, "bad NSEC TypeBitMap", l}, "" } } rr.TypeBitMap = append(rr.TypeBitMap, k) default: return nil, &ParseError{f, "bad NSEC TypeBitMap", l}, "" } l = <-c } return rr, nil, l.comment } func setNSEC3(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(NSEC3) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, l.comment } i, e := strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad NSEC3 Hash", l}, "" } rr.Hash = uint8(i) <-c // zBlank l = <-c i, e = strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad NSEC3 Flags", l}, "" } rr.Flags = uint8(i) <-c // zBlank l = <-c i, e = strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad NSEC3 Iterations", l}, "" } rr.Iterations = uint16(i) <-c l = <-c if len(l.token) == 0 || l.err { return nil, &ParseError{f, "bad NSEC3 Salt", l}, "" } rr.SaltLength = uint8(len(l.token)) / 2 rr.Salt = l.token <-c l = <-c if len(l.token) == 0 || l.err { return nil, &ParseError{f, "bad NSEC3 NextDomain", l}, "" } rr.HashLength = 20 // Fix for NSEC3 (sha1 160 bits) rr.NextDomain = l.token rr.TypeBitMap = make([]uint16, 0) var ( k uint16 ok bool ) l = <-c for l.value != zNewline && l.value != zEOF { switch l.value { case zBlank: // Ok case zString: if k, ok = StringToType[l.tokenUpper]; !ok { if k, ok = typeToInt(l.tokenUpper); !ok { return nil, &ParseError{f, "bad NSEC3 TypeBitMap", l}, "" } } rr.TypeBitMap = append(rr.TypeBitMap, k) default: return nil, &ParseError{f, "bad NSEC3 TypeBitMap", l}, "" } l = <-c } return rr, nil, l.comment } func setNSEC3PARAM(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(NSEC3PARAM) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad NSEC3PARAM Hash", l}, "" } rr.Hash = uint8(i) <-c // zBlank l = <-c i, e = strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad NSEC3PARAM Flags", l}, "" } rr.Flags = uint8(i) <-c // zBlank l = <-c i, e = strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad NSEC3PARAM Iterations", l}, "" } rr.Iterations = uint16(i) <-c l = <-c rr.SaltLength = uint8(len(l.token)) rr.Salt = l.token return rr, nil, "" } func setEUI48(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(EUI48) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } if l.length != 17 || l.err { return nil, &ParseError{f, "bad EUI48 Address", l}, "" } addr := make([]byte, 12) dash := 0 for i := 0; i < 10; i += 2 { addr[i] = l.token[i+dash] addr[i+1] = l.token[i+1+dash] dash++ if l.token[i+1+dash] != '-' { return nil, &ParseError{f, "bad EUI48 Address", l}, "" } } addr[10] = l.token[15] addr[11] = l.token[16] i, e := strconv.ParseUint(string(addr), 16, 48) if e != nil { return nil, &ParseError{f, "bad EUI48 Address", l}, "" } rr.Address = i return rr, nil, "" } func setEUI64(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(EUI64) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } if l.length != 23 || l.err { return nil, &ParseError{f, "bad EUI64 Address", l}, "" } addr := make([]byte, 16) dash := 0 for i := 0; i < 14; i += 2 { addr[i] = l.token[i+dash] addr[i+1] = l.token[i+1+dash] dash++ if l.token[i+1+dash] != '-' { return nil, &ParseError{f, "bad EUI64 Address", l}, "" } } addr[14] = l.token[21] addr[15] = l.token[22] i, e := strconv.ParseUint(string(addr), 16, 64) if e != nil { return nil, &ParseError{f, "bad EUI68 Address", l}, "" } rr.Address = uint64(i) return rr, nil, "" } func setSSHFP(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(SSHFP) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad SSHFP Algorithm", l}, "" } rr.Algorithm = uint8(i) <-c // zBlank l = <-c i, e = strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad SSHFP Type", l}, "" } rr.Type = uint8(i) <-c // zBlank s, e1, c1 := endingToString(c, "bad SSHFP Fingerprint", f) if e1 != nil { return nil, e1, c1 } rr.FingerPrint = s return rr, nil, "" } func setDNSKEYs(h RR_Header, c chan lex, o, f, typ string) (RR, *ParseError, string) { rr := new(DNSKEY) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, l.comment } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad " + typ + " Flags", l}, "" } rr.Flags = uint16(i) <-c // zBlank l = <-c // zString i, e = strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad " + typ + " Protocol", l}, "" } rr.Protocol = uint8(i) <-c // zBlank l = <-c // zString i, e = strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad " + typ + " Algorithm", l}, "" } rr.Algorithm = uint8(i) s, e1, c1 := endingToString(c, "bad "+typ+" PublicKey", f) if e1 != nil { return nil, e1, c1 } rr.PublicKey = s return rr, nil, c1 } func setKEY(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { r, e, s := setDNSKEYs(h, c, o, f, "KEY") if r != nil { return &KEY{*r.(*DNSKEY)}, e, s } return nil, e, s } func setDNSKEY(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { r, e, s := setDNSKEYs(h, c, o, f, "DNSKEY") return r, e, s } func setCDNSKEY(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { r, e, s := setDNSKEYs(h, c, o, f, "CDNSKEY") if r != nil { return &CDNSKEY{*r.(*DNSKEY)}, e, s } return nil, e, s } func setRKEY(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(RKEY) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, l.comment } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad RKEY Flags", l}, "" } rr.Flags = uint16(i) <-c // zBlank l = <-c // zString i, e = strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad RKEY Protocol", l}, "" } rr.Protocol = uint8(i) <-c // zBlank l = <-c // zString i, e = strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad RKEY Algorithm", l}, "" } rr.Algorithm = uint8(i) s, e1, c1 := endingToString(c, "bad RKEY PublicKey", f) if e1 != nil { return nil, e1, c1 } rr.PublicKey = s return rr, nil, c1 } func setEID(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(EID) rr.Hdr = h s, e, c1 := endingToString(c, "bad EID Endpoint", f) if e != nil { return nil, e, c1 } rr.Endpoint = s return rr, nil, c1 } func setNIMLOC(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(NIMLOC) rr.Hdr = h s, e, c1 := endingToString(c, "bad NIMLOC Locator", f) if e != nil { return nil, e, c1 } rr.Locator = s return rr, nil, c1 } func setGPOS(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(GPOS) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } _, e := strconv.ParseFloat(l.token, 64) if e != nil || l.err { return nil, &ParseError{f, "bad GPOS Longitude", l}, "" } rr.Longitude = l.token <-c // zBlank l = <-c _, e = strconv.ParseFloat(l.token, 64) if e != nil || l.err { return nil, &ParseError{f, "bad GPOS Latitude", l}, "" } rr.Latitude = l.token <-c // zBlank l = <-c _, e = strconv.ParseFloat(l.token, 64) if e != nil || l.err { return nil, &ParseError{f, "bad GPOS Altitude", l}, "" } rr.Altitude = l.token return rr, nil, "" } func setDSs(h RR_Header, c chan lex, o, f, typ string) (RR, *ParseError, string) { rr := new(DS) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, l.comment } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad " + typ + " KeyTag", l}, "" } rr.KeyTag = uint16(i) <-c // zBlank l = <-c if i, e = strconv.ParseUint(l.token, 10, 8); e != nil { i, ok := StringToAlgorithm[l.tokenUpper] if !ok || l.err { return nil, &ParseError{f, "bad " + typ + " Algorithm", l}, "" } rr.Algorithm = i } else { rr.Algorithm = uint8(i) } <-c // zBlank l = <-c i, e = strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad " + typ + " DigestType", l}, "" } rr.DigestType = uint8(i) s, e1, c1 := endingToString(c, "bad "+typ+" Digest", f) if e1 != nil { return nil, e1, c1 } rr.Digest = s return rr, nil, c1 } func setDS(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { r, e, s := setDSs(h, c, o, f, "DS") return r, e, s } func setDLV(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { r, e, s := setDSs(h, c, o, f, "DLV") if r != nil { return &DLV{*r.(*DS)}, e, s } return nil, e, s } func setCDS(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { r, e, s := setDSs(h, c, o, f, "CDS") if r != nil { return &CDS{*r.(*DS)}, e, s } return nil, e, s } func setTA(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(TA) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, l.comment } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad TA KeyTag", l}, "" } rr.KeyTag = uint16(i) <-c // zBlank l = <-c if i, e := strconv.ParseUint(l.token, 10, 8); e != nil { i, ok := StringToAlgorithm[l.tokenUpper] if !ok || l.err { return nil, &ParseError{f, "bad TA Algorithm", l}, "" } rr.Algorithm = i } else { rr.Algorithm = uint8(i) } <-c // zBlank l = <-c i, e = strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad TA DigestType", l}, "" } rr.DigestType = uint8(i) s, e, c1 := endingToString(c, "bad TA Digest", f) if e != nil { return nil, e.(*ParseError), c1 } rr.Digest = s return rr, nil, c1 } func setTLSA(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(TLSA) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, l.comment } i, e := strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad TLSA Usage", l}, "" } rr.Usage = uint8(i) <-c // zBlank l = <-c i, e = strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad TLSA Selector", l}, "" } rr.Selector = uint8(i) <-c // zBlank l = <-c i, e = strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad TLSA MatchingType", l}, "" } rr.MatchingType = uint8(i) // So this needs be e2 (i.e. different than e), because...??t s, e2, c1 := endingToString(c, "bad TLSA Certificate", f) if e2 != nil { return nil, e2, c1 } rr.Certificate = s return rr, nil, c1 } func setSMIMEA(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(SMIMEA) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, l.comment } i, e := strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad SMIMEA Usage", l}, "" } rr.Usage = uint8(i) <-c // zBlank l = <-c i, e = strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad SMIMEA Selector", l}, "" } rr.Selector = uint8(i) <-c // zBlank l = <-c i, e = strconv.ParseUint(l.token, 10, 8) if e != nil || l.err { return nil, &ParseError{f, "bad SMIMEA MatchingType", l}, "" } rr.MatchingType = uint8(i) // So this needs be e2 (i.e. different than e), because...??t s, e2, c1 := endingToString(c, "bad SMIMEA Certificate", f) if e2 != nil { return nil, e2, c1 } rr.Certificate = s return rr, nil, c1 } func setRFC3597(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(RFC3597) rr.Hdr = h l := <-c if l.token != "\\#" { return nil, &ParseError{f, "bad RFC3597 Rdata", l}, "" } <-c // zBlank l = <-c rdlength, e := strconv.Atoi(l.token) if e != nil || l.err { return nil, &ParseError{f, "bad RFC3597 Rdata ", l}, "" } s, e1, c1 := endingToString(c, "bad RFC3597 Rdata", f) if e1 != nil { return nil, e1, c1 } if rdlength*2 != len(s) { return nil, &ParseError{f, "bad RFC3597 Rdata", l}, "" } rr.Rdata = s return rr, nil, c1 } func setSPF(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(SPF) rr.Hdr = h s, e, c1 := endingToTxtSlice(c, "bad SPF Txt", f) if e != nil { return nil, e, "" } rr.Txt = s return rr, nil, c1 } func setAVC(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(AVC) rr.Hdr = h s, e, c1 := endingToTxtSlice(c, "bad AVC Txt", f) if e != nil { return nil, e, "" } rr.Txt = s return rr, nil, c1 } func setTXT(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(TXT) rr.Hdr = h // no zBlank reading here, because all this rdata is TXT s, e, c1 := endingToTxtSlice(c, "bad TXT Txt", f) if e != nil { return nil, e, "" } rr.Txt = s return rr, nil, c1 } // identical to setTXT func setNINFO(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(NINFO) rr.Hdr = h s, e, c1 := endingToTxtSlice(c, "bad NINFO ZSData", f) if e != nil { return nil, e, "" } rr.ZSData = s return rr, nil, c1 } func setURI(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(URI) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad URI Priority", l}, "" } rr.Priority = uint16(i) <-c // zBlank l = <-c i, e = strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad URI Weight", l}, "" } rr.Weight = uint16(i) <-c // zBlank s, err, c1 := endingToTxtSlice(c, "bad URI Target", f) if err != nil { return nil, err, "" } if len(s) != 1 { return nil, &ParseError{f, "bad URI Target", l}, "" } rr.Target = s[0] return rr, nil, c1 } func setDHCID(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { // awesome record to parse! rr := new(DHCID) rr.Hdr = h s, e, c1 := endingToString(c, "bad DHCID Digest", f) if e != nil { return nil, e, c1 } rr.Digest = s return rr, nil, c1 } func setNID(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(NID) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad NID Preference", l}, "" } rr.Preference = uint16(i) <-c // zBlank l = <-c // zString u, err := stringToNodeID(l) if err != nil || l.err { return nil, err, "" } rr.NodeID = u return rr, nil, "" } func setL32(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(L32) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad L32 Preference", l}, "" } rr.Preference = uint16(i) <-c // zBlank l = <-c // zString rr.Locator32 = net.ParseIP(l.token) if rr.Locator32 == nil || l.err { return nil, &ParseError{f, "bad L32 Locator", l}, "" } return rr, nil, "" } func setLP(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(LP) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad LP Preference", l}, "" } rr.Preference = uint16(i) <-c // zBlank l = <-c // zString rr.Fqdn = l.token name, nameOk := toAbsoluteName(l.token, o) if l.err || !nameOk { return nil, &ParseError{f, "bad LP Fqdn", l}, "" } rr.Fqdn = name return rr, nil, "" } func setL64(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(L64) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad L64 Preference", l}, "" } rr.Preference = uint16(i) <-c // zBlank l = <-c // zString u, err := stringToNodeID(l) if err != nil || l.err { return nil, err, "" } rr.Locator64 = u return rr, nil, "" } func setUID(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(UID) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 32) if e != nil || l.err { return nil, &ParseError{f, "bad UID Uid", l}, "" } rr.Uid = uint32(i) return rr, nil, "" } func setGID(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(GID) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 32) if e != nil || l.err { return nil, &ParseError{f, "bad GID Gid", l}, "" } rr.Gid = uint32(i) return rr, nil, "" } func setUINFO(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(UINFO) rr.Hdr = h s, e, c1 := endingToTxtSlice(c, "bad UINFO Uinfo", f) if e != nil { return nil, e, c1 } if ln := len(s); ln == 0 { return rr, nil, c1 } rr.Uinfo = s[0] // silently discard anything after the first character-string return rr, nil, c1 } func setPX(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(PX) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, "" } i, e := strconv.ParseUint(l.token, 10, 16) if e != nil || l.err { return nil, &ParseError{f, "bad PX Preference", l}, "" } rr.Preference = uint16(i) <-c // zBlank l = <-c // zString rr.Map822 = l.token map822, map822Ok := toAbsoluteName(l.token, o) if l.err || !map822Ok { return nil, &ParseError{f, "bad PX Map822", l}, "" } rr.Map822 = map822 <-c // zBlank l = <-c // zString rr.Mapx400 = l.token mapx400, mapx400Ok := toAbsoluteName(l.token, o) if l.err || !mapx400Ok { return nil, &ParseError{f, "bad PX Mapx400", l}, "" } rr.Mapx400 = mapx400 return rr, nil, "" } func setCAA(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(CAA) rr.Hdr = h l := <-c if l.length == 0 { // dynamic update rr. return rr, nil, l.comment } i, err := strconv.ParseUint(l.token, 10, 8) if err != nil || l.err { return nil, &ParseError{f, "bad CAA Flag", l}, "" } rr.Flag = uint8(i) <-c // zBlank l = <-c // zString if l.value != zString { return nil, &ParseError{f, "bad CAA Tag", l}, "" } rr.Tag = l.token <-c // zBlank s, e, c1 := endingToTxtSlice(c, "bad CAA Value", f) if e != nil { return nil, e, "" } if len(s) != 1 { return nil, &ParseError{f, "bad CAA Value", l}, "" } rr.Value = s[0] return rr, nil, c1 } func setTKEY(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) { rr := new(TKEY) rr.Hdr = h l := <-c // Algorithm if l.value != zString { return nil, &ParseError{f, "bad TKEY algorithm", l}, "" } rr.Algorithm = l.token <-c // zBlank // Get the key length and key values l = <-c i, err := strconv.ParseUint(l.token, 10, 8) if err != nil || l.err { return nil, &ParseError{f, "bad TKEY key length", l}, "" } rr.KeySize = uint16(i) <-c // zBlank l = <-c if l.value != zString { return nil, &ParseError{f, "bad TKEY key", l}, "" } rr.Key = l.token <-c // zBlank // Get the otherdata length and string data l = <-c i, err = strconv.ParseUint(l.token, 10, 8) if err != nil || l.err { return nil, &ParseError{f, "bad TKEY otherdata length", l}, "" } rr.OtherLen = uint16(i) <-c // zBlank l = <-c if l.value != zString { return nil, &ParseError{f, "bad TKEY otherday", l}, "" } rr.OtherData = l.token return rr, nil, "" } var typeToparserFunc = map[uint16]parserFunc{ TypeAAAA: {setAAAA, false}, TypeAFSDB: {setAFSDB, false}, TypeA: {setA, false}, TypeCAA: {setCAA, true}, TypeCDS: {setCDS, true}, TypeCDNSKEY: {setCDNSKEY, true}, TypeCERT: {setCERT, true}, TypeCNAME: {setCNAME, false}, TypeCSYNC: {setCSYNC, true}, TypeDHCID: {setDHCID, true}, TypeDLV: {setDLV, true}, TypeDNAME: {setDNAME, false}, TypeKEY: {setKEY, true}, TypeDNSKEY: {setDNSKEY, true}, TypeDS: {setDS, true}, TypeEID: {setEID, true}, TypeEUI48: {setEUI48, false}, TypeEUI64: {setEUI64, false}, TypeGID: {setGID, false}, TypeGPOS: {setGPOS, false}, TypeHINFO: {setHINFO, true}, TypeHIP: {setHIP, true}, TypeKX: {setKX, false}, TypeL32: {setL32, false}, TypeL64: {setL64, false}, TypeLOC: {setLOC, true}, TypeLP: {setLP, false}, TypeMB: {setMB, false}, TypeMD: {setMD, false}, TypeMF: {setMF, false}, TypeMG: {setMG, false}, TypeMINFO: {setMINFO, false}, TypeMR: {setMR, false}, TypeMX: {setMX, false}, TypeNAPTR: {setNAPTR, false}, TypeNID: {setNID, false}, TypeNIMLOC: {setNIMLOC, true}, TypeNINFO: {setNINFO, true}, TypeNSAPPTR: {setNSAPPTR, false}, TypeNSEC3PARAM: {setNSEC3PARAM, false}, TypeNSEC3: {setNSEC3, true}, TypeNSEC: {setNSEC, true}, TypeNS: {setNS, false}, TypeOPENPGPKEY: {setOPENPGPKEY, true}, TypePTR: {setPTR, false}, TypePX: {setPX, false}, TypeSIG: {setSIG, true}, TypeRKEY: {setRKEY, true}, TypeRP: {setRP, false}, TypeRRSIG: {setRRSIG, true}, TypeRT: {setRT, false}, TypeSMIMEA: {setSMIMEA, true}, TypeSOA: {setSOA, false}, TypeSPF: {setSPF, true}, TypeAVC: {setAVC, true}, TypeSRV: {setSRV, false}, TypeSSHFP: {setSSHFP, true}, TypeTALINK: {setTALINK, false}, TypeTA: {setTA, true}, TypeTLSA: {setTLSA, true}, TypeTXT: {setTXT, true}, TypeUID: {setUID, false}, TypeUINFO: {setUINFO, true}, TypeURI: {setURI, true}, TypeX25: {setX25, false}, TypeTKEY: {setTKEY, true}, } golang-github-miekg-dns-1.0.4+ds/scan_test.go000066400000000000000000000023651325625637500210570ustar00rootroot00000000000000package dns import ( "io/ioutil" "os" "strings" "testing" ) func TestParseZoneInclude(t *testing.T) { tmpfile, err := ioutil.TempFile("", "dns") if err != nil { t.Fatalf("could not create tmpfile for test: %s", err) } if _, err := tmpfile.WriteString("foo\tIN\tA\t127.0.0.1"); err != nil { t.Fatalf("unable to write content to tmpfile %q: %s", tmpfile.Name(), err) } if err := tmpfile.Close(); err != nil { t.Fatalf("could not close tmpfile %q: %s", tmpfile.Name(), err) } zone := "$ORIGIN example.org.\n$INCLUDE " + tmpfile.Name() tok := ParseZone(strings.NewReader(zone), "", "") for x := range tok { if x.Error != nil { t.Fatalf("expected no error, but got %s", x.Error) } if x.RR.Header().Name != "foo.example.org." { t.Fatalf("expected %s, but got %s", "foo.example.org.", x.RR.Header().Name) } } os.Remove(tmpfile.Name()) tok = ParseZone(strings.NewReader(zone), "", "") for x := range tok { if x.Error == nil { t.Fatalf("expected first token to contain an error but it didn't") } if !strings.Contains(x.Error.Error(), "failed to open") || !strings.Contains(x.Error.Error(), tmpfile.Name()) { t.Fatalf(`expected error to contain: "failed to open" and %q but got: %s`, tmpfile.Name(), x.Error) } } } golang-github-miekg-dns-1.0.4+ds/scanner.go000066400000000000000000000020061325625637500205150ustar00rootroot00000000000000package dns // Implement a simple scanner, return a byte stream from an io reader. import ( "bufio" "context" "io" "text/scanner" ) type scan struct { src *bufio.Reader position scanner.Position eof bool // Have we just seen a eof ctx context.Context } func scanInit(r io.Reader) (*scan, context.CancelFunc) { s := new(scan) s.src = bufio.NewReader(r) s.position.Line = 1 ctx, cancel := context.WithCancel(context.Background()) s.ctx = ctx return s, cancel } // tokenText returns the next byte from the input func (s *scan) tokenText() (byte, error) { c, err := s.src.ReadByte() if err != nil { return c, err } select { case <-s.ctx.Done(): return c, context.Canceled default: break } // delay the newline handling until the next token is delivered, // fixes off-by-one errors when reporting a parse error. if s.eof == true { s.position.Line++ s.position.Column = 0 s.eof = false } if c == '\n' { s.eof = true return c, nil } s.position.Column++ return c, nil } golang-github-miekg-dns-1.0.4+ds/server.go000066400000000000000000000470321325625637500204020ustar00rootroot00000000000000// DNS server implementation. package dns import ( "bytes" "crypto/tls" "encoding/binary" "io" "net" "sync" "time" ) // Maximum number of TCP queries before we close the socket. const maxTCPQueries = 128 // Handler is implemented by any value that implements ServeDNS. type Handler interface { ServeDNS(w ResponseWriter, r *Msg) } // A ResponseWriter interface is used by an DNS handler to // construct an DNS response. type ResponseWriter interface { // LocalAddr returns the net.Addr of the server LocalAddr() net.Addr // RemoteAddr returns the net.Addr of the client that sent the current request. RemoteAddr() net.Addr // WriteMsg writes a reply back to the client. WriteMsg(*Msg) error // Write writes a raw buffer back to the client. Write([]byte) (int, error) // Close closes the connection. Close() error // TsigStatus returns the status of the Tsig. TsigStatus() error // TsigTimersOnly sets the tsig timers only boolean. TsigTimersOnly(bool) // Hijack lets the caller take over the connection. // After a call to Hijack(), the DNS package will not do anything with the connection. Hijack() } type response struct { hijacked bool // connection has been hijacked by handler tsigStatus error tsigTimersOnly bool tsigRequestMAC string tsigSecret map[string]string // the tsig secrets udp *net.UDPConn // i/o connection if UDP was used tcp net.Conn // i/o connection if TCP was used udpSession *SessionUDP // oob data to get egress interface right remoteAddr net.Addr // address of the client writer Writer // writer to output the raw DNS bits } // ServeMux is an DNS request multiplexer. It matches the // zone name of each incoming request against a list of // registered patterns add calls the handler for the pattern // that most closely matches the zone name. ServeMux is DNSSEC aware, meaning // that queries for the DS record are redirected to the parent zone (if that // is also registered), otherwise the child gets the query. // ServeMux is also safe for concurrent access from multiple goroutines. type ServeMux struct { z map[string]Handler m *sync.RWMutex } // NewServeMux allocates and returns a new ServeMux. func NewServeMux() *ServeMux { return &ServeMux{z: make(map[string]Handler), m: new(sync.RWMutex)} } // DefaultServeMux is the default ServeMux used by Serve. var DefaultServeMux = NewServeMux() // The HandlerFunc type is an adapter to allow the use of // ordinary functions as DNS handlers. If f is a function // with the appropriate signature, HandlerFunc(f) is a // Handler object that calls f. type HandlerFunc func(ResponseWriter, *Msg) // ServeDNS calls f(w, r). func (f HandlerFunc) ServeDNS(w ResponseWriter, r *Msg) { f(w, r) } // HandleFailed returns a HandlerFunc that returns SERVFAIL for every request it gets. func HandleFailed(w ResponseWriter, r *Msg) { m := new(Msg) m.SetRcode(r, RcodeServerFailure) // does not matter if this write fails w.WriteMsg(m) } func failedHandler() Handler { return HandlerFunc(HandleFailed) } // ListenAndServe Starts a server on address and network specified Invoke handler // for incoming queries. func ListenAndServe(addr string, network string, handler Handler) error { server := &Server{Addr: addr, Net: network, Handler: handler} return server.ListenAndServe() } // ListenAndServeTLS acts like http.ListenAndServeTLS, more information in // http://golang.org/pkg/net/http/#ListenAndServeTLS func ListenAndServeTLS(addr, certFile, keyFile string, handler Handler) error { cert, err := tls.LoadX509KeyPair(certFile, keyFile) if err != nil { return err } config := tls.Config{ Certificates: []tls.Certificate{cert}, } server := &Server{ Addr: addr, Net: "tcp-tls", TLSConfig: &config, Handler: handler, } return server.ListenAndServe() } // ActivateAndServe activates a server with a listener from systemd, // l and p should not both be non-nil. // If both l and p are not nil only p will be used. // Invoke handler for incoming queries. func ActivateAndServe(l net.Listener, p net.PacketConn, handler Handler) error { server := &Server{Listener: l, PacketConn: p, Handler: handler} return server.ActivateAndServe() } func (mux *ServeMux) match(q string, t uint16) Handler { mux.m.RLock() defer mux.m.RUnlock() var handler Handler b := make([]byte, len(q)) // worst case, one label of length q off := 0 end := false for { l := len(q[off:]) for i := 0; i < l; i++ { b[i] = q[off+i] if b[i] >= 'A' && b[i] <= 'Z' { b[i] |= ('a' - 'A') } } if h, ok := mux.z[string(b[:l])]; ok { // causes garbage, might want to change the map key if t != TypeDS { return h } // Continue for DS to see if we have a parent too, if so delegeate to the parent handler = h } off, end = NextLabel(q, off) if end { break } } // Wildcard match, if we have found nothing try the root zone as a last resort. if h, ok := mux.z["."]; ok { return h } return handler } // Handle adds a handler to the ServeMux for pattern. func (mux *ServeMux) Handle(pattern string, handler Handler) { if pattern == "" { panic("dns: invalid pattern " + pattern) } mux.m.Lock() mux.z[Fqdn(pattern)] = handler mux.m.Unlock() } // HandleFunc adds a handler function to the ServeMux for pattern. func (mux *ServeMux) HandleFunc(pattern string, handler func(ResponseWriter, *Msg)) { mux.Handle(pattern, HandlerFunc(handler)) } // HandleRemove deregistrars the handler specific for pattern from the ServeMux. func (mux *ServeMux) HandleRemove(pattern string) { if pattern == "" { panic("dns: invalid pattern " + pattern) } mux.m.Lock() delete(mux.z, Fqdn(pattern)) mux.m.Unlock() } // ServeDNS dispatches the request to the handler whose // pattern most closely matches the request message. If DefaultServeMux // is used the correct thing for DS queries is done: a possible parent // is sought. // If no handler is found a standard SERVFAIL message is returned // If the request message does not have exactly one question in the // question section a SERVFAIL is returned, unlesss Unsafe is true. func (mux *ServeMux) ServeDNS(w ResponseWriter, request *Msg) { var h Handler if len(request.Question) < 1 { // allow more than one question h = failedHandler() } else { if h = mux.match(request.Question[0].Name, request.Question[0].Qtype); h == nil { h = failedHandler() } } h.ServeDNS(w, request) } // Handle registers the handler with the given pattern // in the DefaultServeMux. The documentation for // ServeMux explains how patterns are matched. func Handle(pattern string, handler Handler) { DefaultServeMux.Handle(pattern, handler) } // HandleRemove deregisters the handle with the given pattern // in the DefaultServeMux. func HandleRemove(pattern string) { DefaultServeMux.HandleRemove(pattern) } // HandleFunc registers the handler function with the given pattern // in the DefaultServeMux. func HandleFunc(pattern string, handler func(ResponseWriter, *Msg)) { DefaultServeMux.HandleFunc(pattern, handler) } // Writer writes raw DNS messages; each call to Write should send an entire message. type Writer interface { io.Writer } // Reader reads raw DNS messages; each call to ReadTCP or ReadUDP should return an entire message. type Reader interface { // ReadTCP reads a raw message from a TCP connection. Implementations may alter // connection properties, for example the read-deadline. ReadTCP(conn net.Conn, timeout time.Duration) ([]byte, error) // ReadUDP reads a raw message from a UDP connection. Implementations may alter // connection properties, for example the read-deadline. ReadUDP(conn *net.UDPConn, timeout time.Duration) ([]byte, *SessionUDP, error) } // defaultReader is an adapter for the Server struct that implements the Reader interface // using the readTCP and readUDP func of the embedded Server. type defaultReader struct { *Server } func (dr *defaultReader) ReadTCP(conn net.Conn, timeout time.Duration) ([]byte, error) { return dr.readTCP(conn, timeout) } func (dr *defaultReader) ReadUDP(conn *net.UDPConn, timeout time.Duration) ([]byte, *SessionUDP, error) { return dr.readUDP(conn, timeout) } // DecorateReader is a decorator hook for extending or supplanting the functionality of a Reader. // Implementations should never return a nil Reader. type DecorateReader func(Reader) Reader // DecorateWriter is a decorator hook for extending or supplanting the functionality of a Writer. // Implementations should never return a nil Writer. type DecorateWriter func(Writer) Writer // A Server defines parameters for running an DNS server. type Server struct { // Address to listen on, ":dns" if empty. Addr string // if "tcp" or "tcp-tls" (DNS over TLS) it will invoke a TCP listener, otherwise an UDP one Net string // TCP Listener to use, this is to aid in systemd's socket activation. Listener net.Listener // TLS connection configuration TLSConfig *tls.Config // UDP "Listener" to use, this is to aid in systemd's socket activation. PacketConn net.PacketConn // Handler to invoke, dns.DefaultServeMux if nil. Handler Handler // Default buffer size to use to read incoming UDP messages. If not set // it defaults to MinMsgSize (512 B). UDPSize int // The net.Conn.SetReadTimeout value for new connections, defaults to 2 * time.Second. ReadTimeout time.Duration // The net.Conn.SetWriteTimeout value for new connections, defaults to 2 * time.Second. WriteTimeout time.Duration // TCP idle timeout for multiple queries, if nil, defaults to 8 * time.Second (RFC 5966). IdleTimeout func() time.Duration // Secret(s) for Tsig map[]. The zonename must be in canonical form (lowercase, fqdn, see RFC 4034 Section 6.2). TsigSecret map[string]string // Unsafe instructs the server to disregard any sanity checks and directly hand the message to // the handler. It will specifically not check if the query has the QR bit not set. Unsafe bool // If NotifyStartedFunc is set it is called once the server has started listening. NotifyStartedFunc func() // DecorateReader is optional, allows customization of the process that reads raw DNS messages. DecorateReader DecorateReader // DecorateWriter is optional, allows customization of the process that writes raw DNS messages. DecorateWriter DecorateWriter // Shutdown handling lock sync.RWMutex started bool } // ListenAndServe starts a nameserver on the configured address in *Server. func (srv *Server) ListenAndServe() error { srv.lock.Lock() defer srv.lock.Unlock() if srv.started { return &Error{err: "server already started"} } addr := srv.Addr if addr == "" { addr = ":domain" } if srv.UDPSize == 0 { srv.UDPSize = MinMsgSize } switch srv.Net { case "tcp", "tcp4", "tcp6": a, err := net.ResolveTCPAddr(srv.Net, addr) if err != nil { return err } l, err := net.ListenTCP(srv.Net, a) if err != nil { return err } srv.Listener = l srv.started = true srv.lock.Unlock() err = srv.serveTCP(l) srv.lock.Lock() // to satisfy the defer at the top return err case "tcp-tls", "tcp4-tls", "tcp6-tls": network := "tcp" if srv.Net == "tcp4-tls" { network = "tcp4" } else if srv.Net == "tcp6-tls" { network = "tcp6" } l, err := tls.Listen(network, addr, srv.TLSConfig) if err != nil { return err } srv.Listener = l srv.started = true srv.lock.Unlock() err = srv.serveTCP(l) srv.lock.Lock() // to satisfy the defer at the top return err case "udp", "udp4", "udp6": a, err := net.ResolveUDPAddr(srv.Net, addr) if err != nil { return err } l, err := net.ListenUDP(srv.Net, a) if err != nil { return err } if e := setUDPSocketOptions(l); e != nil { return e } srv.PacketConn = l srv.started = true srv.lock.Unlock() err = srv.serveUDP(l) srv.lock.Lock() // to satisfy the defer at the top return err } return &Error{err: "bad network"} } // ActivateAndServe starts a nameserver with the PacketConn or Listener // configured in *Server. Its main use is to start a server from systemd. func (srv *Server) ActivateAndServe() error { srv.lock.Lock() defer srv.lock.Unlock() if srv.started { return &Error{err: "server already started"} } pConn := srv.PacketConn l := srv.Listener if pConn != nil { if srv.UDPSize == 0 { srv.UDPSize = MinMsgSize } // Check PacketConn interface's type is valid and value // is not nil if t, ok := pConn.(*net.UDPConn); ok && t != nil { if e := setUDPSocketOptions(t); e != nil { return e } srv.started = true srv.lock.Unlock() e := srv.serveUDP(t) srv.lock.Lock() // to satisfy the defer at the top return e } } if l != nil { srv.started = true srv.lock.Unlock() e := srv.serveTCP(l) srv.lock.Lock() // to satisfy the defer at the top return e } return &Error{err: "bad listeners"} } // Shutdown shuts down a server. After a call to Shutdown, ListenAndServe and // ActivateAndServe will return. func (srv *Server) Shutdown() error { srv.lock.Lock() if !srv.started { srv.lock.Unlock() return &Error{err: "server not started"} } srv.started = false srv.lock.Unlock() if srv.PacketConn != nil { srv.PacketConn.Close() } if srv.Listener != nil { srv.Listener.Close() } return nil } // getReadTimeout is a helper func to use system timeout if server did not intend to change it. func (srv *Server) getReadTimeout() time.Duration { rtimeout := dnsTimeout if srv.ReadTimeout != 0 { rtimeout = srv.ReadTimeout } return rtimeout } // serveTCP starts a TCP listener for the server. // Each request is handled in a separate goroutine. func (srv *Server) serveTCP(l net.Listener) error { defer l.Close() if srv.NotifyStartedFunc != nil { srv.NotifyStartedFunc() } reader := Reader(&defaultReader{srv}) if srv.DecorateReader != nil { reader = srv.DecorateReader(reader) } handler := srv.Handler if handler == nil { handler = DefaultServeMux } rtimeout := srv.getReadTimeout() // deadline is not used here for { rw, err := l.Accept() srv.lock.RLock() if !srv.started { srv.lock.RUnlock() return nil } srv.lock.RUnlock() if err != nil { if neterr, ok := err.(net.Error); ok && neterr.Temporary() { continue } return err } go func() { m, err := reader.ReadTCP(rw, rtimeout) if err != nil { rw.Close() return } srv.serve(rw.RemoteAddr(), handler, m, nil, nil, rw) }() } } // serveUDP starts a UDP listener for the server. // Each request is handled in a separate goroutine. func (srv *Server) serveUDP(l *net.UDPConn) error { defer l.Close() if srv.NotifyStartedFunc != nil { srv.NotifyStartedFunc() } reader := Reader(&defaultReader{srv}) if srv.DecorateReader != nil { reader = srv.DecorateReader(reader) } handler := srv.Handler if handler == nil { handler = DefaultServeMux } rtimeout := srv.getReadTimeout() // deadline is not used here for { m, s, err := reader.ReadUDP(l, rtimeout) srv.lock.RLock() if !srv.started { srv.lock.RUnlock() return nil } srv.lock.RUnlock() if err != nil { if netErr, ok := err.(net.Error); ok && netErr.Temporary() { continue } return err } if len(m) < headerSize { continue } go srv.serve(s.RemoteAddr(), handler, m, l, s, nil) } } // Serve a new connection. func (srv *Server) serve(a net.Addr, h Handler, m []byte, u *net.UDPConn, s *SessionUDP, t net.Conn) { w := &response{tsigSecret: srv.TsigSecret, udp: u, tcp: t, remoteAddr: a, udpSession: s} if srv.DecorateWriter != nil { w.writer = srv.DecorateWriter(w) } else { w.writer = w } q := 0 // counter for the amount of TCP queries we get reader := Reader(&defaultReader{srv}) if srv.DecorateReader != nil { reader = srv.DecorateReader(reader) } Redo: req := new(Msg) err := req.Unpack(m) if err != nil { // Send a FormatError back x := new(Msg) x.SetRcodeFormatError(req) w.WriteMsg(x) goto Exit } if !srv.Unsafe && req.Response { goto Exit } w.tsigStatus = nil if w.tsigSecret != nil { if t := req.IsTsig(); t != nil { secret := t.Hdr.Name if _, ok := w.tsigSecret[secret]; !ok { w.tsigStatus = ErrKeyAlg } w.tsigStatus = TsigVerify(m, w.tsigSecret[secret], "", false) w.tsigTimersOnly = false w.tsigRequestMAC = req.Extra[len(req.Extra)-1].(*TSIG).MAC } } h.ServeDNS(w, req) // Writes back to the client Exit: if w.tcp == nil { return } // TODO(miek): make this number configurable? if q > maxTCPQueries { // close socket after this many queries w.Close() return } if w.hijacked { return // client calls Close() } if u != nil { // UDP, "close" and return w.Close() return } idleTimeout := tcpIdleTimeout if srv.IdleTimeout != nil { idleTimeout = srv.IdleTimeout() } m, err = reader.ReadTCP(w.tcp, idleTimeout) if err == nil { q++ goto Redo } w.Close() return } func (srv *Server) readTCP(conn net.Conn, timeout time.Duration) ([]byte, error) { conn.SetReadDeadline(time.Now().Add(timeout)) l := make([]byte, 2) n, err := conn.Read(l) if err != nil || n != 2 { if err != nil { return nil, err } return nil, ErrShortRead } length := binary.BigEndian.Uint16(l) if length == 0 { return nil, ErrShortRead } m := make([]byte, int(length)) n, err = conn.Read(m[:int(length)]) if err != nil || n == 0 { if err != nil { return nil, err } return nil, ErrShortRead } i := n for i < int(length) { j, err := conn.Read(m[i:int(length)]) if err != nil { return nil, err } i += j } n = i m = m[:n] return m, nil } func (srv *Server) readUDP(conn *net.UDPConn, timeout time.Duration) ([]byte, *SessionUDP, error) { conn.SetReadDeadline(time.Now().Add(timeout)) m := make([]byte, srv.UDPSize) n, s, err := ReadFromSessionUDP(conn, m) if err != nil { return nil, nil, err } m = m[:n] return m, s, nil } // WriteMsg implements the ResponseWriter.WriteMsg method. func (w *response) WriteMsg(m *Msg) (err error) { var data []byte if w.tsigSecret != nil { // if no secrets, dont check for the tsig (which is a longer check) if t := m.IsTsig(); t != nil { data, w.tsigRequestMAC, err = TsigGenerate(m, w.tsigSecret[t.Hdr.Name], w.tsigRequestMAC, w.tsigTimersOnly) if err != nil { return err } _, err = w.writer.Write(data) return err } } data, err = m.Pack() if err != nil { return err } _, err = w.writer.Write(data) return err } // Write implements the ResponseWriter.Write method. func (w *response) Write(m []byte) (int, error) { switch { case w.udp != nil: n, err := WriteToSessionUDP(w.udp, m, w.udpSession) return n, err case w.tcp != nil: lm := len(m) if lm < 2 { return 0, io.ErrShortBuffer } if lm > MaxMsgSize { return 0, &Error{err: "message too large"} } l := make([]byte, 2, 2+lm) binary.BigEndian.PutUint16(l, uint16(lm)) m = append(l, m...) n, err := io.Copy(w.tcp, bytes.NewReader(m)) return int(n), err } panic("not reached") } // LocalAddr implements the ResponseWriter.LocalAddr method. func (w *response) LocalAddr() net.Addr { if w.tcp != nil { return w.tcp.LocalAddr() } return w.udp.LocalAddr() } // RemoteAddr implements the ResponseWriter.RemoteAddr method. func (w *response) RemoteAddr() net.Addr { return w.remoteAddr } // TsigStatus implements the ResponseWriter.TsigStatus method. func (w *response) TsigStatus() error { return w.tsigStatus } // TsigTimersOnly implements the ResponseWriter.TsigTimersOnly method. func (w *response) TsigTimersOnly(b bool) { w.tsigTimersOnly = b } // Hijack implements the ResponseWriter.Hijack method. func (w *response) Hijack() { w.hijacked = true } // Close implements the ResponseWriter.Close method func (w *response) Close() error { // Can't close the udp conn, as that is actually the listener. if w.tcp != nil { e := w.tcp.Close() w.tcp = nil return e } return nil } golang-github-miekg-dns-1.0.4+ds/server_test.go000066400000000000000000000456541325625637500214510ustar00rootroot00000000000000package dns import ( "crypto/tls" "fmt" "io" "net" "runtime" "sync" "testing" "time" ) func HelloServer(w ResponseWriter, req *Msg) { m := new(Msg) m.SetReply(req) m.Extra = make([]RR, 1) m.Extra[0] = &TXT{Hdr: RR_Header{Name: m.Question[0].Name, Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}, Txt: []string{"Hello world"}} w.WriteMsg(m) } func HelloServerBadID(w ResponseWriter, req *Msg) { m := new(Msg) m.SetReply(req) m.Id++ m.Extra = make([]RR, 1) m.Extra[0] = &TXT{Hdr: RR_Header{Name: m.Question[0].Name, Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}, Txt: []string{"Hello world"}} w.WriteMsg(m) } func HelloServerEchoAddrPort(w ResponseWriter, req *Msg) { m := new(Msg) m.SetReply(req) remoteAddr := w.RemoteAddr().String() m.Extra = make([]RR, 1) m.Extra[0] = &TXT{Hdr: RR_Header{Name: m.Question[0].Name, Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}, Txt: []string{remoteAddr}} w.WriteMsg(m) } func AnotherHelloServer(w ResponseWriter, req *Msg) { m := new(Msg) m.SetReply(req) m.Extra = make([]RR, 1) m.Extra[0] = &TXT{Hdr: RR_Header{Name: m.Question[0].Name, Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}, Txt: []string{"Hello example"}} w.WriteMsg(m) } func RunLocalUDPServer(laddr string) (*Server, string, error) { server, l, _, err := RunLocalUDPServerWithFinChan(laddr) return server, l, err } func RunLocalUDPServerWithFinChan(laddr string) (*Server, string, chan struct{}, error) { pc, err := net.ListenPacket("udp", laddr) if err != nil { return nil, "", nil, err } server := &Server{PacketConn: pc, ReadTimeout: time.Hour, WriteTimeout: time.Hour} waitLock := sync.Mutex{} waitLock.Lock() server.NotifyStartedFunc = waitLock.Unlock fin := make(chan struct{}, 0) go func() { server.ActivateAndServe() close(fin) pc.Close() }() waitLock.Lock() return server, pc.LocalAddr().String(), fin, nil } func RunLocalUDPServerUnsafe(laddr string) (*Server, string, error) { pc, err := net.ListenPacket("udp", laddr) if err != nil { return nil, "", err } server := &Server{PacketConn: pc, Unsafe: true, ReadTimeout: time.Hour, WriteTimeout: time.Hour} waitLock := sync.Mutex{} waitLock.Lock() server.NotifyStartedFunc = waitLock.Unlock go func() { server.ActivateAndServe() pc.Close() }() waitLock.Lock() return server, pc.LocalAddr().String(), nil } func RunLocalTCPServer(laddr string) (*Server, string, error) { l, err := net.Listen("tcp", laddr) if err != nil { return nil, "", err } server := &Server{Listener: l, ReadTimeout: time.Hour, WriteTimeout: time.Hour} waitLock := sync.Mutex{} waitLock.Lock() server.NotifyStartedFunc = waitLock.Unlock go func() { server.ActivateAndServe() l.Close() }() waitLock.Lock() return server, l.Addr().String(), nil } func RunLocalTLSServer(laddr string, config *tls.Config) (*Server, string, error) { l, err := tls.Listen("tcp", laddr, config) if err != nil { return nil, "", err } server := &Server{Listener: l, ReadTimeout: time.Hour, WriteTimeout: time.Hour} waitLock := sync.Mutex{} waitLock.Lock() server.NotifyStartedFunc = waitLock.Unlock go func() { server.ActivateAndServe() l.Close() }() waitLock.Lock() return server, l.Addr().String(), nil } func TestServing(t *testing.T) { HandleFunc("miek.nl.", HelloServer) HandleFunc("example.com.", AnotherHelloServer) defer HandleRemove("miek.nl.") defer HandleRemove("example.com.") s, addrstr, err := RunLocalUDPServer(":0") if err != nil { t.Fatalf("unable to run test server: %v", err) } defer s.Shutdown() c := new(Client) m := new(Msg) m.SetQuestion("miek.nl.", TypeTXT) r, _, err := c.Exchange(m, addrstr) if err != nil || len(r.Extra) == 0 { t.Fatal("failed to exchange miek.nl", err) } txt := r.Extra[0].(*TXT).Txt[0] if txt != "Hello world" { t.Error("unexpected result for miek.nl", txt, "!= Hello world") } m.SetQuestion("example.com.", TypeTXT) r, _, err = c.Exchange(m, addrstr) if err != nil { t.Fatal("failed to exchange example.com", err) } txt = r.Extra[0].(*TXT).Txt[0] if txt != "Hello example" { t.Error("unexpected result for example.com", txt, "!= Hello example") } // Test Mixes cased as noticed by Ask. m.SetQuestion("eXaMplE.cOm.", TypeTXT) r, _, err = c.Exchange(m, addrstr) if err != nil { t.Error("failed to exchange eXaMplE.cOm", err) } txt = r.Extra[0].(*TXT).Txt[0] if txt != "Hello example" { t.Error("unexpected result for example.com", txt, "!= Hello example") } } func TestServingTLS(t *testing.T) { HandleFunc("miek.nl.", HelloServer) HandleFunc("example.com.", AnotherHelloServer) defer HandleRemove("miek.nl.") defer HandleRemove("example.com.") cert, err := tls.X509KeyPair(CertPEMBlock, KeyPEMBlock) if err != nil { t.Fatalf("unable to build certificate: %v", err) } config := tls.Config{ Certificates: []tls.Certificate{cert}, } s, addrstr, err := RunLocalTLSServer(":0", &config) if err != nil { t.Fatalf("unable to run test server: %v", err) } defer s.Shutdown() c := new(Client) c.Net = "tcp-tls" c.TLSConfig = &tls.Config{ InsecureSkipVerify: true, } m := new(Msg) m.SetQuestion("miek.nl.", TypeTXT) r, _, err := c.Exchange(m, addrstr) if err != nil || len(r.Extra) == 0 { t.Fatal("failed to exchange miek.nl", err) } txt := r.Extra[0].(*TXT).Txt[0] if txt != "Hello world" { t.Error("unexpected result for miek.nl", txt, "!= Hello world") } m.SetQuestion("example.com.", TypeTXT) r, _, err = c.Exchange(m, addrstr) if err != nil { t.Fatal("failed to exchange example.com", err) } txt = r.Extra[0].(*TXT).Txt[0] if txt != "Hello example" { t.Error("unexpected result for example.com", txt, "!= Hello example") } // Test Mixes cased as noticed by Ask. m.SetQuestion("eXaMplE.cOm.", TypeTXT) r, _, err = c.Exchange(m, addrstr) if err != nil { t.Error("failed to exchange eXaMplE.cOm", err) } txt = r.Extra[0].(*TXT).Txt[0] if txt != "Hello example" { t.Error("unexpected result for example.com", txt, "!= Hello example") } } func TestServingListenAndServe(t *testing.T) { HandleFunc("example.com.", AnotherHelloServer) defer HandleRemove("example.com.") waitLock := sync.Mutex{} server := &Server{Addr: ":0", Net: "udp", ReadTimeout: time.Hour, WriteTimeout: time.Hour, NotifyStartedFunc: waitLock.Unlock} waitLock.Lock() go func() { server.ListenAndServe() }() waitLock.Lock() c, m := new(Client), new(Msg) m.SetQuestion("example.com.", TypeTXT) addr := server.PacketConn.LocalAddr().String() // Get address via the PacketConn that gets set. r, _, err := c.Exchange(m, addr) if err != nil { t.Fatal("failed to exchange example.com", err) } txt := r.Extra[0].(*TXT).Txt[0] if txt != "Hello example" { t.Error("unexpected result for example.com", txt, "!= Hello example") } server.Shutdown() } func TestServingListenAndServeTLS(t *testing.T) { HandleFunc("example.com.", AnotherHelloServer) defer HandleRemove("example.com.") cert, err := tls.X509KeyPair(CertPEMBlock, KeyPEMBlock) if err != nil { t.Fatalf("unable to build certificate: %v", err) } config := &tls.Config{ Certificates: []tls.Certificate{cert}, } waitLock := sync.Mutex{} server := &Server{Addr: ":0", Net: "tcp", TLSConfig: config, ReadTimeout: time.Hour, WriteTimeout: time.Hour, NotifyStartedFunc: waitLock.Unlock} waitLock.Lock() go func() { server.ListenAndServe() }() waitLock.Lock() c, m := new(Client), new(Msg) c.Net = "tcp" m.SetQuestion("example.com.", TypeTXT) addr := server.Listener.Addr().String() // Get address via the Listener that gets set. r, _, err := c.Exchange(m, addr) if err != nil { t.Fatal(err) } txt := r.Extra[0].(*TXT).Txt[0] if txt != "Hello example" { t.Error("unexpected result for example.com", txt, "!= Hello example") } server.Shutdown() } func BenchmarkServe(b *testing.B) { b.StopTimer() HandleFunc("miek.nl.", HelloServer) defer HandleRemove("miek.nl.") a := runtime.GOMAXPROCS(4) s, addrstr, err := RunLocalUDPServer(":0") if err != nil { b.Fatalf("unable to run test server: %v", err) } defer s.Shutdown() c := new(Client) m := new(Msg) m.SetQuestion("miek.nl", TypeSOA) b.StartTimer() for i := 0; i < b.N; i++ { c.Exchange(m, addrstr) } runtime.GOMAXPROCS(a) } func benchmarkServe6(b *testing.B) { b.StopTimer() HandleFunc("miek.nl.", HelloServer) defer HandleRemove("miek.nl.") a := runtime.GOMAXPROCS(4) s, addrstr, err := RunLocalUDPServer("[::1]:0") if err != nil { b.Fatalf("unable to run test server: %v", err) } defer s.Shutdown() c := new(Client) m := new(Msg) m.SetQuestion("miek.nl", TypeSOA) b.StartTimer() for i := 0; i < b.N; i++ { c.Exchange(m, addrstr) } runtime.GOMAXPROCS(a) } func HelloServerCompress(w ResponseWriter, req *Msg) { m := new(Msg) m.SetReply(req) m.Extra = make([]RR, 1) m.Extra[0] = &TXT{Hdr: RR_Header{Name: m.Question[0].Name, Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}, Txt: []string{"Hello world"}} m.Compress = true w.WriteMsg(m) } func BenchmarkServeCompress(b *testing.B) { b.StopTimer() HandleFunc("miek.nl.", HelloServerCompress) defer HandleRemove("miek.nl.") a := runtime.GOMAXPROCS(4) s, addrstr, err := RunLocalUDPServer(":0") if err != nil { b.Fatalf("unable to run test server: %v", err) } defer s.Shutdown() c := new(Client) m := new(Msg) m.SetQuestion("miek.nl", TypeSOA) b.StartTimer() for i := 0; i < b.N; i++ { c.Exchange(m, addrstr) } runtime.GOMAXPROCS(a) } func TestDotAsCatchAllWildcard(t *testing.T) { mux := NewServeMux() mux.Handle(".", HandlerFunc(HelloServer)) mux.Handle("example.com.", HandlerFunc(AnotherHelloServer)) handler := mux.match("www.miek.nl.", TypeTXT) if handler == nil { t.Error("wildcard match failed") } handler = mux.match("www.example.com.", TypeTXT) if handler == nil { t.Error("example.com match failed") } handler = mux.match("a.www.example.com.", TypeTXT) if handler == nil { t.Error("a.www.example.com match failed") } handler = mux.match("boe.", TypeTXT) if handler == nil { t.Error("boe. match failed") } } func TestCaseFolding(t *testing.T) { mux := NewServeMux() mux.Handle("_udp.example.com.", HandlerFunc(HelloServer)) handler := mux.match("_dns._udp.example.com.", TypeSRV) if handler == nil { t.Error("case sensitive characters folded") } handler = mux.match("_DNS._UDP.EXAMPLE.COM.", TypeSRV) if handler == nil { t.Error("case insensitive characters not folded") } } func TestRootServer(t *testing.T) { mux := NewServeMux() mux.Handle(".", HandlerFunc(HelloServer)) handler := mux.match(".", TypeNS) if handler == nil { t.Error("root match failed") } } type maxRec struct { max int sync.RWMutex } var M = new(maxRec) func HelloServerLargeResponse(resp ResponseWriter, req *Msg) { m := new(Msg) m.SetReply(req) m.Authoritative = true m1 := 0 M.RLock() m1 = M.max M.RUnlock() for i := 0; i < m1; i++ { aRec := &A{ Hdr: RR_Header{ Name: req.Question[0].Name, Rrtype: TypeA, Class: ClassINET, Ttl: 0, }, A: net.ParseIP(fmt.Sprintf("127.0.0.%d", i+1)).To4(), } m.Answer = append(m.Answer, aRec) } resp.WriteMsg(m) } func TestServingLargeResponses(t *testing.T) { HandleFunc("example.", HelloServerLargeResponse) defer HandleRemove("example.") s, addrstr, err := RunLocalUDPServer(":0") if err != nil { t.Fatalf("unable to run test server: %v", err) } defer s.Shutdown() // Create request m := new(Msg) m.SetQuestion("web.service.example.", TypeANY) c := new(Client) c.Net = "udp" M.Lock() M.max = 2 M.Unlock() _, _, err = c.Exchange(m, addrstr) if err != nil { t.Errorf("failed to exchange: %v", err) } // This must fail M.Lock() M.max = 20 M.Unlock() _, _, err = c.Exchange(m, addrstr) if err == nil { t.Error("failed to fail exchange, this should generate packet error") } // But this must work again c.UDPSize = 7000 _, _, err = c.Exchange(m, addrstr) if err != nil { t.Errorf("failed to exchange: %v", err) } } func TestServingResponse(t *testing.T) { if testing.Short() { t.Skip("skipping test in short mode.") } HandleFunc("miek.nl.", HelloServer) s, addrstr, err := RunLocalUDPServer(":0") if err != nil { t.Fatalf("unable to run test server: %v", err) } c := new(Client) m := new(Msg) m.SetQuestion("miek.nl.", TypeTXT) m.Response = false _, _, err = c.Exchange(m, addrstr) if err != nil { t.Fatal("failed to exchange", err) } m.Response = true _, _, err = c.Exchange(m, addrstr) if err == nil { t.Fatal("exchanged response message") } s.Shutdown() s, addrstr, err = RunLocalUDPServerUnsafe(":0") if err != nil { t.Fatalf("unable to run test server: %v", err) } defer s.Shutdown() m.Response = true _, _, err = c.Exchange(m, addrstr) if err != nil { t.Fatal("could exchanged response message in Unsafe mode") } } func TestShutdownTCP(t *testing.T) { s, _, err := RunLocalTCPServer(":0") if err != nil { t.Fatalf("unable to run test server: %v", err) } err = s.Shutdown() if err != nil { t.Errorf("could not shutdown test TCP server, %v", err) } } func TestShutdownTLS(t *testing.T) { cert, err := tls.X509KeyPair(CertPEMBlock, KeyPEMBlock) if err != nil { t.Fatalf("unable to build certificate: %v", err) } config := tls.Config{ Certificates: []tls.Certificate{cert}, } s, _, err := RunLocalTLSServer(":0", &config) if err != nil { t.Fatalf("unable to run test server: %v", err) } err = s.Shutdown() if err != nil { t.Errorf("could not shutdown test TLS server, %v", err) } } type trigger struct { done bool sync.RWMutex } func (t *trigger) Set() { t.Lock() defer t.Unlock() t.done = true } func (t *trigger) Get() bool { t.RLock() defer t.RUnlock() return t.done } func TestHandlerCloseTCP(t *testing.T) { ln, err := net.Listen("tcp", ":0") if err != nil { panic(err) } addr := ln.Addr().String() server := &Server{Addr: addr, Net: "tcp", Listener: ln} hname := "testhandlerclosetcp." triggered := &trigger{} HandleFunc(hname, func(w ResponseWriter, r *Msg) { triggered.Set() w.Close() }) defer HandleRemove(hname) go func() { defer server.Shutdown() c := &Client{Net: "tcp"} m := new(Msg).SetQuestion(hname, 1) tries := 0 exchange: _, _, err := c.Exchange(m, addr) if err != nil && err != io.EOF { t.Errorf("exchange failed: %s\n", err) if tries == 3 { return } time.Sleep(time.Second / 10) tries++ goto exchange } }() server.ActivateAndServe() if !triggered.Get() { t.Fatalf("handler never called") } } func TestShutdownUDP(t *testing.T) { s, _, fin, err := RunLocalUDPServerWithFinChan(":0") if err != nil { t.Fatalf("unable to run test server: %v", err) } err = s.Shutdown() if err != nil { t.Errorf("could not shutdown test UDP server, %v", err) } select { case <-fin: case <-time.After(2 * time.Second): t.Error("could not shutdown test UDP server. Gave up waiting") } } func TestServerStartStopRace(t *testing.T) { for i := 0; i < 10; i++ { var err error s := &Server{} s, _, _, err = RunLocalUDPServerWithFinChan(":0") if err != nil { t.Fatalf("could not start server: %s", err) } go func() { if err := s.Shutdown(); err != nil { t.Fatalf("could not stop server: %s", err) } }() } } type ExampleFrameLengthWriter struct { Writer } func (e *ExampleFrameLengthWriter) Write(m []byte) (int, error) { fmt.Println("writing raw DNS message of length", len(m)) return e.Writer.Write(m) } func ExampleDecorateWriter() { // instrument raw DNS message writing wf := DecorateWriter(func(w Writer) Writer { return &ExampleFrameLengthWriter{w} }) // simple UDP server pc, err := net.ListenPacket("udp", ":0") if err != nil { fmt.Println(err.Error()) return } server := &Server{ PacketConn: pc, DecorateWriter: wf, ReadTimeout: time.Hour, WriteTimeout: time.Hour, } waitLock := sync.Mutex{} waitLock.Lock() server.NotifyStartedFunc = waitLock.Unlock defer server.Shutdown() go func() { server.ActivateAndServe() pc.Close() }() waitLock.Lock() HandleFunc("miek.nl.", HelloServer) c := new(Client) m := new(Msg) m.SetQuestion("miek.nl.", TypeTXT) _, _, err = c.Exchange(m, pc.LocalAddr().String()) if err != nil { fmt.Println("failed to exchange", err.Error()) return } // Output: writing raw DNS message of length 56 } var ( // CertPEMBlock is a X509 data used to test TLS servers (used with tls.X509KeyPair) CertPEMBlock = []byte(`-----BEGIN CERTIFICATE----- MIIDAzCCAeugAwIBAgIRAJFYMkcn+b8dpU15wjf++GgwDQYJKoZIhvcNAQELBQAw EjEQMA4GA1UEChMHQWNtZSBDbzAeFw0xNjAxMDgxMjAzNTNaFw0xNzAxMDcxMjAz NTNaMBIxEDAOBgNVBAoTB0FjbWUgQ28wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAw ggEKAoIBAQDXjqO6skvP03k58CNjQggd9G/mt+Wa+xRU+WXiKCCHttawM8x+slq5 yfsHCwxlwsGn79HmJqecNqgHb2GWBXAvVVokFDTcC1hUP4+gp2gu9Ny27UHTjlLm O0l/xZ5MN8tfKyYlFw18tXu3fkaPyHj8v/D1RDkuo4ARdFvGSe8TqisbhLk2+9ow xfIGbEM9Fdiw8qByC2+d+FfvzIKz3GfQVwn0VoRom8L6NBIANq1IGrB5JefZB6nv DnfuxkBmY7F1513HKuEJ8KsLWWZWV9OPU4j4I4Rt+WJNlKjbD2srHxyrS2RDsr91 8nCkNoWVNO3sZq0XkWKecdc921vL4ginAgMBAAGjVDBSMA4GA1UdDwEB/wQEAwIC pDATBgNVHSUEDDAKBggrBgEFBQcDATAPBgNVHRMBAf8EBTADAQH/MBoGA1UdEQQT MBGCCWxvY2FsaG9zdIcEfwAAATANBgkqhkiG9w0BAQsFAAOCAQEAGcU3iyLBIVZj aDzSvEDHUd1bnLBl1C58Xu/CyKlPqVU7mLfK0JcgEaYQTSX6fCJVNLbbCrcGLsPJ fbjlBbyeLjTV413fxPVuona62pBFjqdtbli2Qe8FRH2KBdm41JUJGdo+SdsFu7nc BFOcubdw6LLIXvsTvwndKcHWx1rMX709QU1Vn1GAIsbJV/DWI231Jyyb+lxAUx/C 8vce5uVxiKcGS+g6OjsN3D3TtiEQGSXLh013W6Wsih8td8yMCMZ3w8LQ38br1GUe ahLIgUJ9l6HDguM17R7kGqxNvbElsMUHfTtXXP7UDQUiYXDakg8xDP6n9DCDhJ8Y bSt7OLB7NQ== -----END CERTIFICATE-----`) // KeyPEMBlock is a X509 data used to test TLS servers (used with tls.X509KeyPair) KeyPEMBlock = []byte(`-----BEGIN RSA PRIVATE KEY----- MIIEpQIBAAKCAQEA146jurJLz9N5OfAjY0IIHfRv5rflmvsUVPll4iggh7bWsDPM frJaucn7BwsMZcLBp+/R5iannDaoB29hlgVwL1VaJBQ03AtYVD+PoKdoLvTctu1B 045S5jtJf8WeTDfLXysmJRcNfLV7t35Gj8h4/L/w9UQ5LqOAEXRbxknvE6orG4S5 NvvaMMXyBmxDPRXYsPKgcgtvnfhX78yCs9xn0FcJ9FaEaJvC+jQSADatSBqweSXn 2Qep7w537sZAZmOxdeddxyrhCfCrC1lmVlfTj1OI+COEbfliTZSo2w9rKx8cq0tk Q7K/dfJwpDaFlTTt7GatF5FinnHXPdtby+IIpwIDAQABAoIBAAJK4RDmPooqTJrC JA41MJLo+5uvjwCT9QZmVKAQHzByUFw1YNJkITTiognUI0CdzqNzmH7jIFs39ZeG proKusO2G6xQjrNcZ4cV2fgyb5g4QHStl0qhs94A+WojduiGm2IaumAgm6Mc5wDv ld6HmknN3Mku/ZCyanVFEIjOVn2WB7ZQLTBs6ZYaebTJG2Xv6p9t2YJW7pPQ9Xce s9ohAWohyM4X/OvfnfnLtQp2YLw/BxwehBsCR5SXM3ibTKpFNtxJC8hIfTuWtxZu 2ywrmXShYBRB1WgtZt5k04bY/HFncvvcHK3YfI1+w4URKtwdaQgPUQRbVwDwuyBn flfkCJECgYEA/eWt01iEyE/lXkGn6V9lCocUU7lCU6yk5UT8VXVUc5If4KZKPfCk p4zJDOqwn2eM673aWz/mG9mtvAvmnugaGjcaVCyXOp/D/GDmKSoYcvW5B/yjfkLy dK6Yaa5LDRVYlYgyzcdCT5/9Qc626NzFwKCZNI4ncIU8g7ViATRxWJ8CgYEA2Ver vZ0M606sfgC0H3NtwNBxmuJ+lIF5LNp/wDi07lDfxRR1rnZMX5dnxjcpDr/zvm8J WtJJX3xMgqjtHuWKL3yKKony9J5ZPjichSbSbhrzfovgYIRZLxLLDy4MP9L3+CX/ yBXnqMWuSnFX+M5fVGxdDWiYF3V+wmeOv9JvavkCgYEAiXAPDFzaY+R78O3xiu7M r0o3wqqCMPE/wav6O/hrYrQy9VSO08C0IM6g9pEEUwWmzuXSkZqhYWoQFb8Lc/GI T7CMXAxXQLDDUpbRgG79FR3Wr3AewHZU8LyiXHKwxcBMV4WGmsXGK3wbh8fyU1NO 6NsGk+BvkQVOoK1LBAPzZ1kCgYEAsBSmD8U33T9s4dxiEYTrqyV0lH3g/SFz8ZHH pAyNEPI2iC1ONhyjPWKlcWHpAokiyOqeUpVBWnmSZtzC1qAydsxYB6ShT+sl9BHb RMix/QAauzBJhQhUVJ3OIys0Q1UBDmqCsjCE8SfOT4NKOUnA093C+YT+iyrmmktZ zDCJkckCgYEAndqM5KXGk5xYo+MAA1paZcbTUXwaWwjLU+XSRSSoyBEi5xMtfvUb 7+a1OMhLwWbuz+pl64wFKrbSUyimMOYQpjVE/1vk/kb99pxbgol27hdKyTH1d+ov kFsxKCqxAnBVGEWAvVZAiiTOxleQFjz5RnL0BQp9Lg2cQe+dvuUmIAA= -----END RSA PRIVATE KEY-----`) ) golang-github-miekg-dns-1.0.4+ds/sig0.go000066400000000000000000000116751325625637500177420ustar00rootroot00000000000000package dns import ( "crypto" "crypto/dsa" "crypto/ecdsa" "crypto/rsa" "encoding/binary" "math/big" "strings" "time" ) // Sign signs a dns.Msg. It fills the signature with the appropriate data. // The SIG record should have the SignerName, KeyTag, Algorithm, Inception // and Expiration set. func (rr *SIG) Sign(k crypto.Signer, m *Msg) ([]byte, error) { if k == nil { return nil, ErrPrivKey } if rr.KeyTag == 0 || len(rr.SignerName) == 0 || rr.Algorithm == 0 { return nil, ErrKey } rr.Header().Rrtype = TypeSIG rr.Header().Class = ClassANY rr.Header().Ttl = 0 rr.Header().Name = "." rr.OrigTtl = 0 rr.TypeCovered = 0 rr.Labels = 0 buf := make([]byte, m.Len()+rr.len()) mbuf, err := m.PackBuffer(buf) if err != nil { return nil, err } if &buf[0] != &mbuf[0] { return nil, ErrBuf } off, err := PackRR(rr, buf, len(mbuf), nil, false) if err != nil { return nil, err } buf = buf[:off:cap(buf)] hash, ok := AlgorithmToHash[rr.Algorithm] if !ok { return nil, ErrAlg } hasher := hash.New() // Write SIG rdata hasher.Write(buf[len(mbuf)+1+2+2+4+2:]) // Write message hasher.Write(buf[:len(mbuf)]) signature, err := sign(k, hasher.Sum(nil), hash, rr.Algorithm) if err != nil { return nil, err } rr.Signature = toBase64(signature) buf = append(buf, signature...) if len(buf) > int(^uint16(0)) { return nil, ErrBuf } // Adjust sig data length rdoff := len(mbuf) + 1 + 2 + 2 + 4 rdlen := binary.BigEndian.Uint16(buf[rdoff:]) rdlen += uint16(len(signature)) binary.BigEndian.PutUint16(buf[rdoff:], rdlen) // Adjust additional count adc := binary.BigEndian.Uint16(buf[10:]) adc++ binary.BigEndian.PutUint16(buf[10:], adc) return buf, nil } // Verify validates the message buf using the key k. // It's assumed that buf is a valid message from which rr was unpacked. func (rr *SIG) Verify(k *KEY, buf []byte) error { if k == nil { return ErrKey } if rr.KeyTag == 0 || len(rr.SignerName) == 0 || rr.Algorithm == 0 { return ErrKey } var hash crypto.Hash switch rr.Algorithm { case DSA, RSASHA1: hash = crypto.SHA1 case RSASHA256, ECDSAP256SHA256: hash = crypto.SHA256 case ECDSAP384SHA384: hash = crypto.SHA384 case RSASHA512: hash = crypto.SHA512 default: return ErrAlg } hasher := hash.New() buflen := len(buf) qdc := binary.BigEndian.Uint16(buf[4:]) anc := binary.BigEndian.Uint16(buf[6:]) auc := binary.BigEndian.Uint16(buf[8:]) adc := binary.BigEndian.Uint16(buf[10:]) offset := 12 var err error for i := uint16(0); i < qdc && offset < buflen; i++ { _, offset, err = UnpackDomainName(buf, offset) if err != nil { return err } // Skip past Type and Class offset += 2 + 2 } for i := uint16(1); i < anc+auc+adc && offset < buflen; i++ { _, offset, err = UnpackDomainName(buf, offset) if err != nil { return err } // Skip past Type, Class and TTL offset += 2 + 2 + 4 if offset+1 >= buflen { continue } var rdlen uint16 rdlen = binary.BigEndian.Uint16(buf[offset:]) offset += 2 offset += int(rdlen) } if offset >= buflen { return &Error{err: "overflowing unpacking signed message"} } // offset should be just prior to SIG bodyend := offset // owner name SHOULD be root _, offset, err = UnpackDomainName(buf, offset) if err != nil { return err } // Skip Type, Class, TTL, RDLen offset += 2 + 2 + 4 + 2 sigstart := offset // Skip Type Covered, Algorithm, Labels, Original TTL offset += 2 + 1 + 1 + 4 if offset+4+4 >= buflen { return &Error{err: "overflow unpacking signed message"} } expire := binary.BigEndian.Uint32(buf[offset:]) offset += 4 incept := binary.BigEndian.Uint32(buf[offset:]) offset += 4 now := uint32(time.Now().Unix()) if now < incept || now > expire { return ErrTime } // Skip key tag offset += 2 var signername string signername, offset, err = UnpackDomainName(buf, offset) if err != nil { return err } // If key has come from the DNS name compression might // have mangled the case of the name if strings.ToLower(signername) != strings.ToLower(k.Header().Name) { return &Error{err: "signer name doesn't match key name"} } sigend := offset hasher.Write(buf[sigstart:sigend]) hasher.Write(buf[:10]) hasher.Write([]byte{ byte((adc - 1) << 8), byte(adc - 1), }) hasher.Write(buf[12:bodyend]) hashed := hasher.Sum(nil) sig := buf[sigend:] switch k.Algorithm { case DSA: pk := k.publicKeyDSA() sig = sig[1:] r := big.NewInt(0) r.SetBytes(sig[:len(sig)/2]) s := big.NewInt(0) s.SetBytes(sig[len(sig)/2:]) if pk != nil { if dsa.Verify(pk, hashed, r, s) { return nil } return ErrSig } case RSASHA1, RSASHA256, RSASHA512: pk := k.publicKeyRSA() if pk != nil { return rsa.VerifyPKCS1v15(pk, hash, hashed, sig) } case ECDSAP256SHA256, ECDSAP384SHA384: pk := k.publicKeyECDSA() r := big.NewInt(0) r.SetBytes(sig[:len(sig)/2]) s := big.NewInt(0) s.SetBytes(sig[len(sig)/2:]) if pk != nil { if ecdsa.Verify(pk, hashed, r, s) { return nil } return ErrSig } } return ErrKeyAlg } golang-github-miekg-dns-1.0.4+ds/sig0_test.go000066400000000000000000000043051325625637500207710ustar00rootroot00000000000000package dns import ( "crypto" "testing" "time" ) func TestSIG0(t *testing.T) { if testing.Short() { t.Skip("skipping test in short mode.") } m := new(Msg) m.SetQuestion("example.org.", TypeSOA) for _, alg := range []uint8{ECDSAP256SHA256, ECDSAP384SHA384, RSASHA1, RSASHA256, RSASHA512} { algstr := AlgorithmToString[alg] keyrr := new(KEY) keyrr.Hdr.Name = algstr + "." keyrr.Hdr.Rrtype = TypeKEY keyrr.Hdr.Class = ClassINET keyrr.Algorithm = alg keysize := 1024 switch alg { case ECDSAP256SHA256: keysize = 256 case ECDSAP384SHA384: keysize = 384 } pk, err := keyrr.Generate(keysize) if err != nil { t.Errorf("failed to generate key for “%s”: %v", algstr, err) continue } now := uint32(time.Now().Unix()) sigrr := new(SIG) sigrr.Hdr.Name = "." sigrr.Hdr.Rrtype = TypeSIG sigrr.Hdr.Class = ClassANY sigrr.Algorithm = alg sigrr.Expiration = now + 300 sigrr.Inception = now - 300 sigrr.KeyTag = keyrr.KeyTag() sigrr.SignerName = keyrr.Hdr.Name mb, err := sigrr.Sign(pk.(crypto.Signer), m) if err != nil { t.Errorf("failed to sign message using “%s”: %v", algstr, err) continue } m := new(Msg) if err := m.Unpack(mb); err != nil { t.Errorf("failed to unpack message signed using “%s”: %v", algstr, err) continue } if len(m.Extra) != 1 { t.Errorf("missing SIG for message signed using “%s”", algstr) continue } var sigrrwire *SIG switch rr := m.Extra[0].(type) { case *SIG: sigrrwire = rr default: t.Errorf("expected SIG RR, instead: %v", rr) continue } for _, rr := range []*SIG{sigrr, sigrrwire} { id := "sigrr" if rr == sigrrwire { id = "sigrrwire" } if err := rr.Verify(keyrr, mb); err != nil { t.Errorf("failed to verify “%s” signed SIG(%s): %v", algstr, id, err) continue } } mb[13]++ if err := sigrr.Verify(keyrr, mb); err == nil { t.Errorf("verify succeeded on an altered message using “%s”", algstr) continue } sigrr.Expiration = 2 sigrr.Inception = 1 mb, _ = sigrr.Sign(pk.(crypto.Signer), m) if err := sigrr.Verify(keyrr, mb); err == nil { t.Errorf("verify succeeded on an expired message using “%s”", algstr) continue } } } golang-github-miekg-dns-1.0.4+ds/singleinflight.go000066400000000000000000000027111325625637500220750ustar00rootroot00000000000000// Copyright 2013 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // Adapted for dns package usage by Miek Gieben. package dns import "sync" import "time" // call is an in-flight or completed singleflight.Do call type call struct { wg sync.WaitGroup val *Msg rtt time.Duration err error dups int } // singleflight represents a class of work and forms a namespace in // which units of work can be executed with duplicate suppression. type singleflight struct { sync.Mutex // protects m m map[string]*call // lazily initialized } // Do executes and returns the results of the given function, making // sure that only one execution is in-flight for a given key at a // time. If a duplicate comes in, the duplicate caller waits for the // original to complete and receives the same results. // The return value shared indicates whether v was given to multiple callers. func (g *singleflight) Do(key string, fn func() (*Msg, time.Duration, error)) (v *Msg, rtt time.Duration, err error, shared bool) { g.Lock() if g.m == nil { g.m = make(map[string]*call) } if c, ok := g.m[key]; ok { c.dups++ g.Unlock() c.wg.Wait() return c.val, c.rtt, c.err, true } c := new(call) c.wg.Add(1) g.m[key] = c g.Unlock() c.val, c.rtt, c.err = fn() c.wg.Done() g.Lock() delete(g.m, key) g.Unlock() return c.val, c.rtt, c.err, c.dups > 0 } golang-github-miekg-dns-1.0.4+ds/smimea.go000066400000000000000000000025621325625637500203460ustar00rootroot00000000000000package dns import ( "crypto/sha256" "crypto/x509" "encoding/hex" ) // Sign creates a SMIMEA record from an SSL certificate. func (r *SMIMEA) Sign(usage, selector, matchingType int, cert *x509.Certificate) (err error) { r.Hdr.Rrtype = TypeSMIMEA r.Usage = uint8(usage) r.Selector = uint8(selector) r.MatchingType = uint8(matchingType) r.Certificate, err = CertificateToDANE(r.Selector, r.MatchingType, cert) if err != nil { return err } return nil } // Verify verifies a SMIMEA record against an SSL certificate. If it is OK // a nil error is returned. func (r *SMIMEA) Verify(cert *x509.Certificate) error { c, err := CertificateToDANE(r.Selector, r.MatchingType, cert) if err != nil { return err // Not also ErrSig? } if r.Certificate == c { return nil } return ErrSig // ErrSig, really? } // SMIMEAName returns the ownername of a SMIMEA resource record as per the // format specified in RFC 'draft-ietf-dane-smime-12' Section 2 and 3 func SMIMEAName(email, domain string) (string, error) { hasher := sha256.New() hasher.Write([]byte(email)) // RFC Section 3: "The local-part is hashed using the SHA2-256 // algorithm with the hash truncated to 28 octets and // represented in its hexadecimal representation to become the // left-most label in the prepared domain name" return hex.EncodeToString(hasher.Sum(nil)[:28]) + "." + "_smimecert." + domain, nil } golang-github-miekg-dns-1.0.4+ds/tlsa.go000066400000000000000000000022141325625637500200300ustar00rootroot00000000000000package dns import ( "crypto/x509" "net" "strconv" ) // Sign creates a TLSA record from an SSL certificate. func (r *TLSA) Sign(usage, selector, matchingType int, cert *x509.Certificate) (err error) { r.Hdr.Rrtype = TypeTLSA r.Usage = uint8(usage) r.Selector = uint8(selector) r.MatchingType = uint8(matchingType) r.Certificate, err = CertificateToDANE(r.Selector, r.MatchingType, cert) if err != nil { return err } return nil } // Verify verifies a TLSA record against an SSL certificate. If it is OK // a nil error is returned. func (r *TLSA) Verify(cert *x509.Certificate) error { c, err := CertificateToDANE(r.Selector, r.MatchingType, cert) if err != nil { return err // Not also ErrSig? } if r.Certificate == c { return nil } return ErrSig // ErrSig, really? } // TLSAName returns the ownername of a TLSA resource record as per the // rules specified in RFC 6698, Section 3. func TLSAName(name, service, network string) (string, error) { if !IsFqdn(name) { return "", ErrFqdn } p, err := net.LookupPort(network, service) if err != nil { return "", err } return "_" + strconv.Itoa(p) + "._" + network + "." + name, nil } golang-github-miekg-dns-1.0.4+ds/tsig.go000066400000000000000000000224041325625637500200360ustar00rootroot00000000000000package dns import ( "crypto/hmac" "crypto/md5" "crypto/sha1" "crypto/sha256" "crypto/sha512" "encoding/binary" "encoding/hex" "hash" "strconv" "strings" "time" ) // HMAC hashing codes. These are transmitted as domain names. const ( HmacMD5 = "hmac-md5.sig-alg.reg.int." HmacSHA1 = "hmac-sha1." HmacSHA256 = "hmac-sha256." HmacSHA512 = "hmac-sha512." ) // TSIG is the RR the holds the transaction signature of a message. // See RFC 2845 and RFC 4635. type TSIG struct { Hdr RR_Header Algorithm string `dns:"domain-name"` TimeSigned uint64 `dns:"uint48"` Fudge uint16 MACSize uint16 MAC string `dns:"size-hex:MACSize"` OrigId uint16 Error uint16 OtherLen uint16 OtherData string `dns:"size-hex:OtherLen"` } // TSIG has no official presentation format, but this will suffice. func (rr *TSIG) String() string { s := "\n;; TSIG PSEUDOSECTION:\n" s += rr.Hdr.String() + " " + rr.Algorithm + " " + tsigTimeToString(rr.TimeSigned) + " " + strconv.Itoa(int(rr.Fudge)) + " " + strconv.Itoa(int(rr.MACSize)) + " " + strings.ToUpper(rr.MAC) + " " + strconv.Itoa(int(rr.OrigId)) + " " + strconv.Itoa(int(rr.Error)) + // BIND prints NOERROR " " + strconv.Itoa(int(rr.OtherLen)) + " " + rr.OtherData return s } // The following values must be put in wireformat, so that the MAC can be calculated. // RFC 2845, section 3.4.2. TSIG Variables. type tsigWireFmt struct { // From RR_Header Name string `dns:"domain-name"` Class uint16 Ttl uint32 // Rdata of the TSIG Algorithm string `dns:"domain-name"` TimeSigned uint64 `dns:"uint48"` Fudge uint16 // MACSize, MAC and OrigId excluded Error uint16 OtherLen uint16 OtherData string `dns:"size-hex:OtherLen"` } // If we have the MAC use this type to convert it to wiredata. Section 3.4.3. Request MAC type macWireFmt struct { MACSize uint16 MAC string `dns:"size-hex:MACSize"` } // 3.3. Time values used in TSIG calculations type timerWireFmt struct { TimeSigned uint64 `dns:"uint48"` Fudge uint16 } // TsigGenerate fills out the TSIG record attached to the message. // The message should contain // a "stub" TSIG RR with the algorithm, key name (owner name of the RR), // time fudge (defaults to 300 seconds) and the current time // The TSIG MAC is saved in that Tsig RR. // When TsigGenerate is called for the first time requestMAC is set to the empty string and // timersOnly is false. // If something goes wrong an error is returned, otherwise it is nil. func TsigGenerate(m *Msg, secret, requestMAC string, timersOnly bool) ([]byte, string, error) { if m.IsTsig() == nil { panic("dns: TSIG not last RR in additional") } // If we barf here, the caller is to blame rawsecret, err := fromBase64([]byte(secret)) if err != nil { return nil, "", err } rr := m.Extra[len(m.Extra)-1].(*TSIG) m.Extra = m.Extra[0 : len(m.Extra)-1] // kill the TSIG from the msg mbuf, err := m.Pack() if err != nil { return nil, "", err } buf := tsigBuffer(mbuf, rr, requestMAC, timersOnly) t := new(TSIG) var h hash.Hash switch strings.ToLower(rr.Algorithm) { case HmacMD5: h = hmac.New(md5.New, []byte(rawsecret)) case HmacSHA1: h = hmac.New(sha1.New, []byte(rawsecret)) case HmacSHA256: h = hmac.New(sha256.New, []byte(rawsecret)) case HmacSHA512: h = hmac.New(sha512.New, []byte(rawsecret)) default: return nil, "", ErrKeyAlg } h.Write(buf) t.MAC = hex.EncodeToString(h.Sum(nil)) t.MACSize = uint16(len(t.MAC) / 2) // Size is half! t.Hdr = RR_Header{Name: rr.Hdr.Name, Rrtype: TypeTSIG, Class: ClassANY, Ttl: 0} t.Fudge = rr.Fudge t.TimeSigned = rr.TimeSigned t.Algorithm = rr.Algorithm t.OrigId = m.Id tbuf := make([]byte, t.len()) if off, err := PackRR(t, tbuf, 0, nil, false); err == nil { tbuf = tbuf[:off] // reset to actual size used } else { return nil, "", err } mbuf = append(mbuf, tbuf...) // Update the ArCount directly in the buffer. binary.BigEndian.PutUint16(mbuf[10:], uint16(len(m.Extra)+1)) return mbuf, t.MAC, nil } // TsigVerify verifies the TSIG on a message. // If the signature does not validate err contains the // error, otherwise it is nil. func TsigVerify(msg []byte, secret, requestMAC string, timersOnly bool) error { rawsecret, err := fromBase64([]byte(secret)) if err != nil { return err } // Strip the TSIG from the incoming msg stripped, tsig, err := stripTsig(msg) if err != nil { return err } msgMAC, err := hex.DecodeString(tsig.MAC) if err != nil { return err } buf := tsigBuffer(stripped, tsig, requestMAC, timersOnly) // Fudge factor works both ways. A message can arrive before it was signed because // of clock skew. now := uint64(time.Now().Unix()) ti := now - tsig.TimeSigned if now < tsig.TimeSigned { ti = tsig.TimeSigned - now } if uint64(tsig.Fudge) < ti { return ErrTime } var h hash.Hash switch strings.ToLower(tsig.Algorithm) { case HmacMD5: h = hmac.New(md5.New, rawsecret) case HmacSHA1: h = hmac.New(sha1.New, rawsecret) case HmacSHA256: h = hmac.New(sha256.New, rawsecret) case HmacSHA512: h = hmac.New(sha512.New, rawsecret) default: return ErrKeyAlg } h.Write(buf) if !hmac.Equal(h.Sum(nil), msgMAC) { return ErrSig } return nil } // Create a wiredata buffer for the MAC calculation. func tsigBuffer(msgbuf []byte, rr *TSIG, requestMAC string, timersOnly bool) []byte { var buf []byte if rr.TimeSigned == 0 { rr.TimeSigned = uint64(time.Now().Unix()) } if rr.Fudge == 0 { rr.Fudge = 300 // Standard (RFC) default. } // Replace message ID in header with original ID from TSIG binary.BigEndian.PutUint16(msgbuf[0:2], rr.OrigId) if requestMAC != "" { m := new(macWireFmt) m.MACSize = uint16(len(requestMAC) / 2) m.MAC = requestMAC buf = make([]byte, len(requestMAC)) // long enough n, _ := packMacWire(m, buf) buf = buf[:n] } tsigvar := make([]byte, DefaultMsgSize) if timersOnly { tsig := new(timerWireFmt) tsig.TimeSigned = rr.TimeSigned tsig.Fudge = rr.Fudge n, _ := packTimerWire(tsig, tsigvar) tsigvar = tsigvar[:n] } else { tsig := new(tsigWireFmt) tsig.Name = strings.ToLower(rr.Hdr.Name) tsig.Class = ClassANY tsig.Ttl = rr.Hdr.Ttl tsig.Algorithm = strings.ToLower(rr.Algorithm) tsig.TimeSigned = rr.TimeSigned tsig.Fudge = rr.Fudge tsig.Error = rr.Error tsig.OtherLen = rr.OtherLen tsig.OtherData = rr.OtherData n, _ := packTsigWire(tsig, tsigvar) tsigvar = tsigvar[:n] } if requestMAC != "" { x := append(buf, msgbuf...) buf = append(x, tsigvar...) } else { buf = append(msgbuf, tsigvar...) } return buf } // Strip the TSIG from the raw message. func stripTsig(msg []byte) ([]byte, *TSIG, error) { // Copied from msg.go's Unpack() Header, but modified. var ( dh Header err error ) off, tsigoff := 0, 0 if dh, off, err = unpackMsgHdr(msg, off); err != nil { return nil, nil, err } if dh.Arcount == 0 { return nil, nil, ErrNoSig } // Rcode, see msg.go Unpack() if int(dh.Bits&0xF) == RcodeNotAuth { return nil, nil, ErrAuth } for i := 0; i < int(dh.Qdcount); i++ { _, off, err = unpackQuestion(msg, off) if err != nil { return nil, nil, err } } _, off, err = unpackRRslice(int(dh.Ancount), msg, off) if err != nil { return nil, nil, err } _, off, err = unpackRRslice(int(dh.Nscount), msg, off) if err != nil { return nil, nil, err } rr := new(TSIG) var extra RR for i := 0; i < int(dh.Arcount); i++ { tsigoff = off extra, off, err = UnpackRR(msg, off) if err != nil { return nil, nil, err } if extra.Header().Rrtype == TypeTSIG { rr = extra.(*TSIG) // Adjust Arcount. arcount := binary.BigEndian.Uint16(msg[10:]) binary.BigEndian.PutUint16(msg[10:], arcount-1) break } } if rr == nil { return nil, nil, ErrNoSig } return msg[:tsigoff], rr, nil } // Translate the TSIG time signed into a date. There is no // need for RFC1982 calculations as this date is 48 bits. func tsigTimeToString(t uint64) string { ti := time.Unix(int64(t), 0).UTC() return ti.Format("20060102150405") } func packTsigWire(tw *tsigWireFmt, msg []byte) (int, error) { // copied from zmsg.go TSIG packing // RR_Header off, err := PackDomainName(tw.Name, msg, 0, nil, false) if err != nil { return off, err } off, err = packUint16(tw.Class, msg, off) if err != nil { return off, err } off, err = packUint32(tw.Ttl, msg, off) if err != nil { return off, err } off, err = PackDomainName(tw.Algorithm, msg, off, nil, false) if err != nil { return off, err } off, err = packUint48(tw.TimeSigned, msg, off) if err != nil { return off, err } off, err = packUint16(tw.Fudge, msg, off) if err != nil { return off, err } off, err = packUint16(tw.Error, msg, off) if err != nil { return off, err } off, err = packUint16(tw.OtherLen, msg, off) if err != nil { return off, err } off, err = packStringHex(tw.OtherData, msg, off) if err != nil { return off, err } return off, nil } func packMacWire(mw *macWireFmt, msg []byte) (int, error) { off, err := packUint16(mw.MACSize, msg, 0) if err != nil { return off, err } off, err = packStringHex(mw.MAC, msg, off) if err != nil { return off, err } return off, nil } func packTimerWire(tw *timerWireFmt, msg []byte) (int, error) { off, err := packUint48(tw.TimeSigned, msg, 0) if err != nil { return off, err } off, err = packUint16(tw.Fudge, msg, off) if err != nil { return off, err } return off, nil } golang-github-miekg-dns-1.0.4+ds/tsig_test.go000066400000000000000000000022421325625637500210730ustar00rootroot00000000000000package dns import ( "encoding/binary" "testing" "time" ) func newTsig(algo string) *Msg { m := new(Msg) m.SetQuestion("example.org.", TypeA) m.SetTsig("example.", algo, 300, time.Now().Unix()) return m } func TestTsig(t *testing.T) { m := newTsig(HmacMD5) buf, _, err := TsigGenerate(m, "pRZgBrBvI4NAHZYhxmhs/Q==", "", false) if err != nil { t.Fatal(err) } err = TsigVerify(buf, "pRZgBrBvI4NAHZYhxmhs/Q==", "", false) if err != nil { t.Fatal(err) } // TSIG accounts for ID substitution. This means if the message ID is // changed by a forwarder, we should still be able to verify the TSIG. m = newTsig(HmacMD5) buf, _, err = TsigGenerate(m, "pRZgBrBvI4NAHZYhxmhs/Q==", "", false) if err != nil { t.Fatal(err) } binary.BigEndian.PutUint16(buf[0:2], uint16(42)) err = TsigVerify(buf, "pRZgBrBvI4NAHZYhxmhs/Q==", "", false) if err != nil { t.Fatal(err) } } func TestTsigCase(t *testing.T) { m := newTsig("HmAc-mD5.sig-ALg.rEg.int.") // HmacMD5 buf, _, err := TsigGenerate(m, "pRZgBrBvI4NAHZYhxmhs/Q==", "", false) if err != nil { t.Fatal(err) } err = TsigVerify(buf, "pRZgBrBvI4NAHZYhxmhs/Q==", "", false) if err != nil { t.Fatal(err) } } golang-github-miekg-dns-1.0.4+ds/types.go000066400000000000000000000772131325625637500202440ustar00rootroot00000000000000package dns import ( "fmt" "net" "strconv" "strings" "time" ) type ( // Type is a DNS type. Type uint16 // Class is a DNS class. Class uint16 // Name is a DNS domain name. Name string ) // Packet formats // Wire constants and supported types. const ( // valid RR_Header.Rrtype and Question.qtype TypeNone uint16 = 0 TypeA uint16 = 1 TypeNS uint16 = 2 TypeMD uint16 = 3 TypeMF uint16 = 4 TypeCNAME uint16 = 5 TypeSOA uint16 = 6 TypeMB uint16 = 7 TypeMG uint16 = 8 TypeMR uint16 = 9 TypeNULL uint16 = 10 TypePTR uint16 = 12 TypeHINFO uint16 = 13 TypeMINFO uint16 = 14 TypeMX uint16 = 15 TypeTXT uint16 = 16 TypeRP uint16 = 17 TypeAFSDB uint16 = 18 TypeX25 uint16 = 19 TypeISDN uint16 = 20 TypeRT uint16 = 21 TypeNSAPPTR uint16 = 23 TypeSIG uint16 = 24 TypeKEY uint16 = 25 TypePX uint16 = 26 TypeGPOS uint16 = 27 TypeAAAA uint16 = 28 TypeLOC uint16 = 29 TypeNXT uint16 = 30 TypeEID uint16 = 31 TypeNIMLOC uint16 = 32 TypeSRV uint16 = 33 TypeATMA uint16 = 34 TypeNAPTR uint16 = 35 TypeKX uint16 = 36 TypeCERT uint16 = 37 TypeDNAME uint16 = 39 TypeOPT uint16 = 41 // EDNS TypeDS uint16 = 43 TypeSSHFP uint16 = 44 TypeRRSIG uint16 = 46 TypeNSEC uint16 = 47 TypeDNSKEY uint16 = 48 TypeDHCID uint16 = 49 TypeNSEC3 uint16 = 50 TypeNSEC3PARAM uint16 = 51 TypeTLSA uint16 = 52 TypeSMIMEA uint16 = 53 TypeHIP uint16 = 55 TypeNINFO uint16 = 56 TypeRKEY uint16 = 57 TypeTALINK uint16 = 58 TypeCDS uint16 = 59 TypeCDNSKEY uint16 = 60 TypeOPENPGPKEY uint16 = 61 TypeCSYNC uint16 = 62 TypeSPF uint16 = 99 TypeUINFO uint16 = 100 TypeUID uint16 = 101 TypeGID uint16 = 102 TypeUNSPEC uint16 = 103 TypeNID uint16 = 104 TypeL32 uint16 = 105 TypeL64 uint16 = 106 TypeLP uint16 = 107 TypeEUI48 uint16 = 108 TypeEUI64 uint16 = 109 TypeURI uint16 = 256 TypeCAA uint16 = 257 TypeAVC uint16 = 258 TypeTKEY uint16 = 249 TypeTSIG uint16 = 250 // valid Question.Qtype only TypeIXFR uint16 = 251 TypeAXFR uint16 = 252 TypeMAILB uint16 = 253 TypeMAILA uint16 = 254 TypeANY uint16 = 255 TypeTA uint16 = 32768 TypeDLV uint16 = 32769 TypeReserved uint16 = 65535 // valid Question.Qclass ClassINET = 1 ClassCSNET = 2 ClassCHAOS = 3 ClassHESIOD = 4 ClassNONE = 254 ClassANY = 255 // Message Response Codes, see https://www.iana.org/assignments/dns-parameters/dns-parameters.xhtml RcodeSuccess = 0 // NoError - No Error [DNS] RcodeFormatError = 1 // FormErr - Format Error [DNS] RcodeServerFailure = 2 // ServFail - Server Failure [DNS] RcodeNameError = 3 // NXDomain - Non-Existent Domain [DNS] RcodeNotImplemented = 4 // NotImp - Not Implemented [DNS] RcodeRefused = 5 // Refused - Query Refused [DNS] RcodeYXDomain = 6 // YXDomain - Name Exists when it should not [DNS Update] RcodeYXRrset = 7 // YXRRSet - RR Set Exists when it should not [DNS Update] RcodeNXRrset = 8 // NXRRSet - RR Set that should exist does not [DNS Update] RcodeNotAuth = 9 // NotAuth - Server Not Authoritative for zone [DNS Update] RcodeNotZone = 10 // NotZone - Name not contained in zone [DNS Update/TSIG] RcodeBadSig = 16 // BADSIG - TSIG Signature Failure [TSIG] RcodeBadVers = 16 // BADVERS - Bad OPT Version [EDNS0] RcodeBadKey = 17 // BADKEY - Key not recognized [TSIG] RcodeBadTime = 18 // BADTIME - Signature out of time window [TSIG] RcodeBadMode = 19 // BADMODE - Bad TKEY Mode [TKEY] RcodeBadName = 20 // BADNAME - Duplicate key name [TKEY] RcodeBadAlg = 21 // BADALG - Algorithm not supported [TKEY] RcodeBadTrunc = 22 // BADTRUNC - Bad Truncation [TSIG] RcodeBadCookie = 23 // BADCOOKIE - Bad/missing Server Cookie [DNS Cookies] // Message Opcodes. There is no 3. OpcodeQuery = 0 OpcodeIQuery = 1 OpcodeStatus = 2 OpcodeNotify = 4 OpcodeUpdate = 5 ) // Header is the wire format for the DNS packet header. type Header struct { Id uint16 Bits uint16 Qdcount, Ancount, Nscount, Arcount uint16 } const ( headerSize = 12 // Header.Bits _QR = 1 << 15 // query/response (response=1) _AA = 1 << 10 // authoritative _TC = 1 << 9 // truncated _RD = 1 << 8 // recursion desired _RA = 1 << 7 // recursion available _Z = 1 << 6 // Z _AD = 1 << 5 // authticated data _CD = 1 << 4 // checking disabled ) // Various constants used in the LOC RR, See RFC 1887. const ( LOC_EQUATOR = 1 << 31 // RFC 1876, Section 2. LOC_PRIMEMERIDIAN = 1 << 31 // RFC 1876, Section 2. LOC_HOURS = 60 * 1000 LOC_DEGREES = 60 * LOC_HOURS LOC_ALTITUDEBASE = 100000 ) // Different Certificate Types, see RFC 4398, Section 2.1 const ( CertPKIX = 1 + iota CertSPKI CertPGP CertIPIX CertISPKI CertIPGP CertACPKIX CertIACPKIX CertURI = 253 CertOID = 254 ) // CertTypeToString converts the Cert Type to its string representation. // See RFC 4398 and RFC 6944. var CertTypeToString = map[uint16]string{ CertPKIX: "PKIX", CertSPKI: "SPKI", CertPGP: "PGP", CertIPIX: "IPIX", CertISPKI: "ISPKI", CertIPGP: "IPGP", CertACPKIX: "ACPKIX", CertIACPKIX: "IACPKIX", CertURI: "URI", CertOID: "OID", } // StringToCertType is the reverseof CertTypeToString. var StringToCertType = reverseInt16(CertTypeToString) //go:generate go run types_generate.go // Question holds a DNS question. There can be multiple questions in the // question section of a message. Usually there is just one. type Question struct { Name string `dns:"cdomain-name"` // "cdomain-name" specifies encoding (and may be compressed) Qtype uint16 Qclass uint16 } func (q *Question) len() int { return len(q.Name) + 1 + 2 + 2 } func (q *Question) String() (s string) { // prefix with ; (as in dig) s = ";" + sprintName(q.Name) + "\t" s += Class(q.Qclass).String() + "\t" s += " " + Type(q.Qtype).String() return s } // ANY is a wildcard record. See RFC 1035, Section 3.2.3. ANY // is named "*" there. type ANY struct { Hdr RR_Header // Does not have any rdata } func (rr *ANY) String() string { return rr.Hdr.String() } // CNAME RR. See RFC 1034. type CNAME struct { Hdr RR_Header Target string `dns:"cdomain-name"` } func (rr *CNAME) String() string { return rr.Hdr.String() + sprintName(rr.Target) } // HINFO RR. See RFC 1034. type HINFO struct { Hdr RR_Header Cpu string Os string } func (rr *HINFO) String() string { return rr.Hdr.String() + sprintTxt([]string{rr.Cpu, rr.Os}) } // MB RR. See RFC 1035. type MB struct { Hdr RR_Header Mb string `dns:"cdomain-name"` } func (rr *MB) String() string { return rr.Hdr.String() + sprintName(rr.Mb) } // MG RR. See RFC 1035. type MG struct { Hdr RR_Header Mg string `dns:"cdomain-name"` } func (rr *MG) String() string { return rr.Hdr.String() + sprintName(rr.Mg) } // MINFO RR. See RFC 1035. type MINFO struct { Hdr RR_Header Rmail string `dns:"cdomain-name"` Email string `dns:"cdomain-name"` } func (rr *MINFO) String() string { return rr.Hdr.String() + sprintName(rr.Rmail) + " " + sprintName(rr.Email) } // MR RR. See RFC 1035. type MR struct { Hdr RR_Header Mr string `dns:"cdomain-name"` } func (rr *MR) String() string { return rr.Hdr.String() + sprintName(rr.Mr) } // MF RR. See RFC 1035. type MF struct { Hdr RR_Header Mf string `dns:"cdomain-name"` } func (rr *MF) String() string { return rr.Hdr.String() + sprintName(rr.Mf) } // MD RR. See RFC 1035. type MD struct { Hdr RR_Header Md string `dns:"cdomain-name"` } func (rr *MD) String() string { return rr.Hdr.String() + sprintName(rr.Md) } // MX RR. See RFC 1035. type MX struct { Hdr RR_Header Preference uint16 Mx string `dns:"cdomain-name"` } func (rr *MX) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) + " " + sprintName(rr.Mx) } // AFSDB RR. See RFC 1183. type AFSDB struct { Hdr RR_Header Subtype uint16 Hostname string `dns:"cdomain-name"` } func (rr *AFSDB) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.Subtype)) + " " + sprintName(rr.Hostname) } // X25 RR. See RFC 1183, Section 3.1. type X25 struct { Hdr RR_Header PSDNAddress string } func (rr *X25) String() string { return rr.Hdr.String() + rr.PSDNAddress } // RT RR. See RFC 1183, Section 3.3. type RT struct { Hdr RR_Header Preference uint16 Host string `dns:"cdomain-name"` } func (rr *RT) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) + " " + sprintName(rr.Host) } // NS RR. See RFC 1035. type NS struct { Hdr RR_Header Ns string `dns:"cdomain-name"` } func (rr *NS) String() string { return rr.Hdr.String() + sprintName(rr.Ns) } // PTR RR. See RFC 1035. type PTR struct { Hdr RR_Header Ptr string `dns:"cdomain-name"` } func (rr *PTR) String() string { return rr.Hdr.String() + sprintName(rr.Ptr) } // RP RR. See RFC 1138, Section 2.2. type RP struct { Hdr RR_Header Mbox string `dns:"domain-name"` Txt string `dns:"domain-name"` } func (rr *RP) String() string { return rr.Hdr.String() + rr.Mbox + " " + sprintTxt([]string{rr.Txt}) } // SOA RR. See RFC 1035. type SOA struct { Hdr RR_Header Ns string `dns:"cdomain-name"` Mbox string `dns:"cdomain-name"` Serial uint32 Refresh uint32 Retry uint32 Expire uint32 Minttl uint32 } func (rr *SOA) String() string { return rr.Hdr.String() + sprintName(rr.Ns) + " " + sprintName(rr.Mbox) + " " + strconv.FormatInt(int64(rr.Serial), 10) + " " + strconv.FormatInt(int64(rr.Refresh), 10) + " " + strconv.FormatInt(int64(rr.Retry), 10) + " " + strconv.FormatInt(int64(rr.Expire), 10) + " " + strconv.FormatInt(int64(rr.Minttl), 10) } // TXT RR. See RFC 1035. type TXT struct { Hdr RR_Header Txt []string `dns:"txt"` } func (rr *TXT) String() string { return rr.Hdr.String() + sprintTxt(rr.Txt) } func sprintName(s string) string { src := []byte(s) dst := make([]byte, 0, len(src)) for i := 0; i < len(src); { if i+1 < len(src) && src[i] == '\\' && src[i+1] == '.' { dst = append(dst, src[i:i+2]...) i += 2 } else { b, n := nextByte(src, i) if n == 0 { i++ // dangling back slash } else if b == '.' { dst = append(dst, b) } else { dst = appendDomainNameByte(dst, b) } i += n } } return string(dst) } func sprintTxtOctet(s string) string { src := []byte(s) dst := make([]byte, 0, len(src)) dst = append(dst, '"') for i := 0; i < len(src); { if i+1 < len(src) && src[i] == '\\' && src[i+1] == '.' { dst = append(dst, src[i:i+2]...) i += 2 } else { b, n := nextByte(src, i) if n == 0 { i++ // dangling back slash } else if b == '.' { dst = append(dst, b) } else { if b < ' ' || b > '~' { dst = appendByte(dst, b) } else { dst = append(dst, b) } } i += n } } dst = append(dst, '"') return string(dst) } func sprintTxt(txt []string) string { var out []byte for i, s := range txt { if i > 0 { out = append(out, ` "`...) } else { out = append(out, '"') } bs := []byte(s) for j := 0; j < len(bs); { b, n := nextByte(bs, j) if n == 0 { break } out = appendTXTStringByte(out, b) j += n } out = append(out, '"') } return string(out) } func appendDomainNameByte(s []byte, b byte) []byte { switch b { case '.', ' ', '\'', '@', ';', '(', ')': // additional chars to escape return append(s, '\\', b) } return appendTXTStringByte(s, b) } func appendTXTStringByte(s []byte, b byte) []byte { switch b { case '"', '\\': return append(s, '\\', b) } if b < ' ' || b > '~' { return appendByte(s, b) } return append(s, b) } func appendByte(s []byte, b byte) []byte { var buf [3]byte bufs := strconv.AppendInt(buf[:0], int64(b), 10) s = append(s, '\\') for i := 0; i < 3-len(bufs); i++ { s = append(s, '0') } for _, r := range bufs { s = append(s, r) } return s } func nextByte(b []byte, offset int) (byte, int) { if offset >= len(b) { return 0, 0 } if b[offset] != '\\' { // not an escape sequence return b[offset], 1 } switch len(b) - offset { case 1: // dangling escape return 0, 0 case 2, 3: // too short to be \ddd default: // maybe \ddd if isDigit(b[offset+1]) && isDigit(b[offset+2]) && isDigit(b[offset+3]) { return dddToByte(b[offset+1:]), 4 } } // not \ddd, just an RFC 1035 "quoted" character return b[offset+1], 2 } // SPF RR. See RFC 4408, Section 3.1.1. type SPF struct { Hdr RR_Header Txt []string `dns:"txt"` } func (rr *SPF) String() string { return rr.Hdr.String() + sprintTxt(rr.Txt) } // AVC RR. See https://www.iana.org/assignments/dns-parameters/AVC/avc-completed-template. type AVC struct { Hdr RR_Header Txt []string `dns:"txt"` } func (rr *AVC) String() string { return rr.Hdr.String() + sprintTxt(rr.Txt) } // SRV RR. See RFC 2782. type SRV struct { Hdr RR_Header Priority uint16 Weight uint16 Port uint16 Target string `dns:"domain-name"` } func (rr *SRV) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.Priority)) + " " + strconv.Itoa(int(rr.Weight)) + " " + strconv.Itoa(int(rr.Port)) + " " + sprintName(rr.Target) } // NAPTR RR. See RFC 2915. type NAPTR struct { Hdr RR_Header Order uint16 Preference uint16 Flags string Service string Regexp string Replacement string `dns:"domain-name"` } func (rr *NAPTR) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.Order)) + " " + strconv.Itoa(int(rr.Preference)) + " " + "\"" + rr.Flags + "\" " + "\"" + rr.Service + "\" " + "\"" + rr.Regexp + "\" " + rr.Replacement } // CERT RR. See RFC 4398. type CERT struct { Hdr RR_Header Type uint16 KeyTag uint16 Algorithm uint8 Certificate string `dns:"base64"` } func (rr *CERT) String() string { var ( ok bool certtype, algorithm string ) if certtype, ok = CertTypeToString[rr.Type]; !ok { certtype = strconv.Itoa(int(rr.Type)) } if algorithm, ok = AlgorithmToString[rr.Algorithm]; !ok { algorithm = strconv.Itoa(int(rr.Algorithm)) } return rr.Hdr.String() + certtype + " " + strconv.Itoa(int(rr.KeyTag)) + " " + algorithm + " " + rr.Certificate } // DNAME RR. See RFC 2672. type DNAME struct { Hdr RR_Header Target string `dns:"domain-name"` } func (rr *DNAME) String() string { return rr.Hdr.String() + sprintName(rr.Target) } // A RR. See RFC 1035. type A struct { Hdr RR_Header A net.IP `dns:"a"` } func (rr *A) String() string { if rr.A == nil { return rr.Hdr.String() } return rr.Hdr.String() + rr.A.String() } // AAAA RR. See RFC 3596. type AAAA struct { Hdr RR_Header AAAA net.IP `dns:"aaaa"` } func (rr *AAAA) String() string { if rr.AAAA == nil { return rr.Hdr.String() } return rr.Hdr.String() + rr.AAAA.String() } // PX RR. See RFC 2163. type PX struct { Hdr RR_Header Preference uint16 Map822 string `dns:"domain-name"` Mapx400 string `dns:"domain-name"` } func (rr *PX) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) + " " + sprintName(rr.Map822) + " " + sprintName(rr.Mapx400) } // GPOS RR. See RFC 1712. type GPOS struct { Hdr RR_Header Longitude string Latitude string Altitude string } func (rr *GPOS) String() string { return rr.Hdr.String() + rr.Longitude + " " + rr.Latitude + " " + rr.Altitude } // LOC RR. See RFC RFC 1876. type LOC struct { Hdr RR_Header Version uint8 Size uint8 HorizPre uint8 VertPre uint8 Latitude uint32 Longitude uint32 Altitude uint32 } // cmToM takes a cm value expressed in RFC1876 SIZE mantissa/exponent // format and returns a string in m (two decimals for the cm) func cmToM(m, e uint8) string { if e < 2 { if e == 1 { m *= 10 } return fmt.Sprintf("0.%02d", m) } s := fmt.Sprintf("%d", m) for e > 2 { s += "0" e-- } return s } func (rr *LOC) String() string { s := rr.Hdr.String() lat := rr.Latitude ns := "N" if lat > LOC_EQUATOR { lat = lat - LOC_EQUATOR } else { ns = "S" lat = LOC_EQUATOR - lat } h := lat / LOC_DEGREES lat = lat % LOC_DEGREES m := lat / LOC_HOURS lat = lat % LOC_HOURS s += fmt.Sprintf("%02d %02d %0.3f %s ", h, m, (float64(lat) / 1000), ns) lon := rr.Longitude ew := "E" if lon > LOC_PRIMEMERIDIAN { lon = lon - LOC_PRIMEMERIDIAN } else { ew = "W" lon = LOC_PRIMEMERIDIAN - lon } h = lon / LOC_DEGREES lon = lon % LOC_DEGREES m = lon / LOC_HOURS lon = lon % LOC_HOURS s += fmt.Sprintf("%02d %02d %0.3f %s ", h, m, (float64(lon) / 1000), ew) var alt = float64(rr.Altitude) / 100 alt -= LOC_ALTITUDEBASE if rr.Altitude%100 != 0 { s += fmt.Sprintf("%.2fm ", alt) } else { s += fmt.Sprintf("%.0fm ", alt) } s += cmToM((rr.Size&0xf0)>>4, rr.Size&0x0f) + "m " s += cmToM((rr.HorizPre&0xf0)>>4, rr.HorizPre&0x0f) + "m " s += cmToM((rr.VertPre&0xf0)>>4, rr.VertPre&0x0f) + "m" return s } // SIG RR. See RFC 2535. The SIG RR is identical to RRSIG and nowadays only used for SIG(0), See RFC 2931. type SIG struct { RRSIG } // RRSIG RR. See RFC 4034 and RFC 3755. type RRSIG struct { Hdr RR_Header TypeCovered uint16 Algorithm uint8 Labels uint8 OrigTtl uint32 Expiration uint32 Inception uint32 KeyTag uint16 SignerName string `dns:"domain-name"` Signature string `dns:"base64"` } func (rr *RRSIG) String() string { s := rr.Hdr.String() s += Type(rr.TypeCovered).String() s += " " + strconv.Itoa(int(rr.Algorithm)) + " " + strconv.Itoa(int(rr.Labels)) + " " + strconv.FormatInt(int64(rr.OrigTtl), 10) + " " + TimeToString(rr.Expiration) + " " + TimeToString(rr.Inception) + " " + strconv.Itoa(int(rr.KeyTag)) + " " + sprintName(rr.SignerName) + " " + rr.Signature return s } // NSEC RR. See RFC 4034 and RFC 3755. type NSEC struct { Hdr RR_Header NextDomain string `dns:"domain-name"` TypeBitMap []uint16 `dns:"nsec"` } func (rr *NSEC) String() string { s := rr.Hdr.String() + sprintName(rr.NextDomain) for i := 0; i < len(rr.TypeBitMap); i++ { s += " " + Type(rr.TypeBitMap[i]).String() } return s } func (rr *NSEC) len() int { l := rr.Hdr.len() + len(rr.NextDomain) + 1 lastwindow := uint32(2 ^ 32 + 1) for _, t := range rr.TypeBitMap { window := t / 256 if uint32(window) != lastwindow { l += 1 + 32 } lastwindow = uint32(window) } return l } // DLV RR. See RFC 4431. type DLV struct{ DS } // CDS RR. See RFC 7344. type CDS struct{ DS } // DS RR. See RFC 4034 and RFC 3658. type DS struct { Hdr RR_Header KeyTag uint16 Algorithm uint8 DigestType uint8 Digest string `dns:"hex"` } func (rr *DS) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.KeyTag)) + " " + strconv.Itoa(int(rr.Algorithm)) + " " + strconv.Itoa(int(rr.DigestType)) + " " + strings.ToUpper(rr.Digest) } // KX RR. See RFC 2230. type KX struct { Hdr RR_Header Preference uint16 Exchanger string `dns:"domain-name"` } func (rr *KX) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) + " " + sprintName(rr.Exchanger) } // TA RR. See http://www.watson.org/~weiler/INI1999-19.pdf. type TA struct { Hdr RR_Header KeyTag uint16 Algorithm uint8 DigestType uint8 Digest string `dns:"hex"` } func (rr *TA) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.KeyTag)) + " " + strconv.Itoa(int(rr.Algorithm)) + " " + strconv.Itoa(int(rr.DigestType)) + " " + strings.ToUpper(rr.Digest) } // TALINK RR. See https://www.iana.org/assignments/dns-parameters/TALINK/talink-completed-template. type TALINK struct { Hdr RR_Header PreviousName string `dns:"domain-name"` NextName string `dns:"domain-name"` } func (rr *TALINK) String() string { return rr.Hdr.String() + sprintName(rr.PreviousName) + " " + sprintName(rr.NextName) } // SSHFP RR. See RFC RFC 4255. type SSHFP struct { Hdr RR_Header Algorithm uint8 Type uint8 FingerPrint string `dns:"hex"` } func (rr *SSHFP) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.Algorithm)) + " " + strconv.Itoa(int(rr.Type)) + " " + strings.ToUpper(rr.FingerPrint) } // KEY RR. See RFC RFC 2535. type KEY struct { DNSKEY } // CDNSKEY RR. See RFC 7344. type CDNSKEY struct { DNSKEY } // DNSKEY RR. See RFC 4034 and RFC 3755. type DNSKEY struct { Hdr RR_Header Flags uint16 Protocol uint8 Algorithm uint8 PublicKey string `dns:"base64"` } func (rr *DNSKEY) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.Flags)) + " " + strconv.Itoa(int(rr.Protocol)) + " " + strconv.Itoa(int(rr.Algorithm)) + " " + rr.PublicKey } // RKEY RR. See https://www.iana.org/assignments/dns-parameters/RKEY/rkey-completed-template. type RKEY struct { Hdr RR_Header Flags uint16 Protocol uint8 Algorithm uint8 PublicKey string `dns:"base64"` } func (rr *RKEY) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.Flags)) + " " + strconv.Itoa(int(rr.Protocol)) + " " + strconv.Itoa(int(rr.Algorithm)) + " " + rr.PublicKey } // NSAPPTR RR. See RFC 1348. type NSAPPTR struct { Hdr RR_Header Ptr string `dns:"domain-name"` } func (rr *NSAPPTR) String() string { return rr.Hdr.String() + sprintName(rr.Ptr) } // NSEC3 RR. See RFC 5155. type NSEC3 struct { Hdr RR_Header Hash uint8 Flags uint8 Iterations uint16 SaltLength uint8 Salt string `dns:"size-hex:SaltLength"` HashLength uint8 NextDomain string `dns:"size-base32:HashLength"` TypeBitMap []uint16 `dns:"nsec"` } func (rr *NSEC3) String() string { s := rr.Hdr.String() s += strconv.Itoa(int(rr.Hash)) + " " + strconv.Itoa(int(rr.Flags)) + " " + strconv.Itoa(int(rr.Iterations)) + " " + saltToString(rr.Salt) + " " + rr.NextDomain for i := 0; i < len(rr.TypeBitMap); i++ { s += " " + Type(rr.TypeBitMap[i]).String() } return s } func (rr *NSEC3) len() int { l := rr.Hdr.len() + 6 + len(rr.Salt)/2 + 1 + len(rr.NextDomain) + 1 lastwindow := uint32(2 ^ 32 + 1) for _, t := range rr.TypeBitMap { window := t / 256 if uint32(window) != lastwindow { l += 1 + 32 } lastwindow = uint32(window) } return l } // NSEC3PARAM RR. See RFC 5155. type NSEC3PARAM struct { Hdr RR_Header Hash uint8 Flags uint8 Iterations uint16 SaltLength uint8 Salt string `dns:"size-hex:SaltLength"` } func (rr *NSEC3PARAM) String() string { s := rr.Hdr.String() s += strconv.Itoa(int(rr.Hash)) + " " + strconv.Itoa(int(rr.Flags)) + " " + strconv.Itoa(int(rr.Iterations)) + " " + saltToString(rr.Salt) return s } // TKEY RR. See RFC 2930. type TKEY struct { Hdr RR_Header Algorithm string `dns:"domain-name"` Inception uint32 Expiration uint32 Mode uint16 Error uint16 KeySize uint16 Key string `dns:"size-hex:KeySize"` OtherLen uint16 OtherData string `dns:"size-hex:OtherLen"` } // TKEY has no official presentation format, but this will suffice. func (rr *TKEY) String() string { s := "\n;; TKEY PSEUDOSECTION:\n" s += rr.Hdr.String() + " " + rr.Algorithm + " " + strconv.Itoa(int(rr.KeySize)) + " " + rr.Key + " " + strconv.Itoa(int(rr.OtherLen)) + " " + rr.OtherData return s } // RFC3597 represents an unknown/generic RR. See RFC 3597. type RFC3597 struct { Hdr RR_Header Rdata string `dns:"hex"` } func (rr *RFC3597) String() string { // Let's call it a hack s := rfc3597Header(rr.Hdr) s += "\\# " + strconv.Itoa(len(rr.Rdata)/2) + " " + rr.Rdata return s } func rfc3597Header(h RR_Header) string { var s string s += sprintName(h.Name) + "\t" s += strconv.FormatInt(int64(h.Ttl), 10) + "\t" s += "CLASS" + strconv.Itoa(int(h.Class)) + "\t" s += "TYPE" + strconv.Itoa(int(h.Rrtype)) + "\t" return s } // URI RR. See RFC 7553. type URI struct { Hdr RR_Header Priority uint16 Weight uint16 Target string `dns:"octet"` } func (rr *URI) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.Priority)) + " " + strconv.Itoa(int(rr.Weight)) + " " + sprintTxtOctet(rr.Target) } // DHCID RR. See RFC 4701. type DHCID struct { Hdr RR_Header Digest string `dns:"base64"` } func (rr *DHCID) String() string { return rr.Hdr.String() + rr.Digest } // TLSA RR. See RFC 6698. type TLSA struct { Hdr RR_Header Usage uint8 Selector uint8 MatchingType uint8 Certificate string `dns:"hex"` } func (rr *TLSA) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.Usage)) + " " + strconv.Itoa(int(rr.Selector)) + " " + strconv.Itoa(int(rr.MatchingType)) + " " + rr.Certificate } // SMIMEA RR. See RFC 8162. type SMIMEA struct { Hdr RR_Header Usage uint8 Selector uint8 MatchingType uint8 Certificate string `dns:"hex"` } func (rr *SMIMEA) String() string { s := rr.Hdr.String() + strconv.Itoa(int(rr.Usage)) + " " + strconv.Itoa(int(rr.Selector)) + " " + strconv.Itoa(int(rr.MatchingType)) // Every Nth char needs a space on this output. If we output // this as one giant line, we can't read it can in because in some cases // the cert length overflows scan.maxTok (2048). sx := splitN(rr.Certificate, 1024) // conservative value here s += " " + strings.Join(sx, " ") return s } // HIP RR. See RFC 8005. type HIP struct { Hdr RR_Header HitLength uint8 PublicKeyAlgorithm uint8 PublicKeyLength uint16 Hit string `dns:"size-hex:HitLength"` PublicKey string `dns:"size-base64:PublicKeyLength"` RendezvousServers []string `dns:"domain-name"` } func (rr *HIP) String() string { s := rr.Hdr.String() + strconv.Itoa(int(rr.PublicKeyAlgorithm)) + " " + rr.Hit + " " + rr.PublicKey for _, d := range rr.RendezvousServers { s += " " + sprintName(d) } return s } // NINFO RR. See https://www.iana.org/assignments/dns-parameters/NINFO/ninfo-completed-template. type NINFO struct { Hdr RR_Header ZSData []string `dns:"txt"` } func (rr *NINFO) String() string { return rr.Hdr.String() + sprintTxt(rr.ZSData) } // NID RR. See RFC RFC 6742. type NID struct { Hdr RR_Header Preference uint16 NodeID uint64 } func (rr *NID) String() string { s := rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) node := fmt.Sprintf("%0.16x", rr.NodeID) s += " " + node[0:4] + ":" + node[4:8] + ":" + node[8:12] + ":" + node[12:16] return s } // L32 RR, See RFC 6742. type L32 struct { Hdr RR_Header Preference uint16 Locator32 net.IP `dns:"a"` } func (rr *L32) String() string { if rr.Locator32 == nil { return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) } return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) + " " + rr.Locator32.String() } // L64 RR, See RFC 6742. type L64 struct { Hdr RR_Header Preference uint16 Locator64 uint64 } func (rr *L64) String() string { s := rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) node := fmt.Sprintf("%0.16X", rr.Locator64) s += " " + node[0:4] + ":" + node[4:8] + ":" + node[8:12] + ":" + node[12:16] return s } // LP RR. See RFC 6742. type LP struct { Hdr RR_Header Preference uint16 Fqdn string `dns:"domain-name"` } func (rr *LP) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) + " " + sprintName(rr.Fqdn) } // EUI48 RR. See RFC 7043. type EUI48 struct { Hdr RR_Header Address uint64 `dns:"uint48"` } func (rr *EUI48) String() string { return rr.Hdr.String() + euiToString(rr.Address, 48) } // EUI64 RR. See RFC 7043. type EUI64 struct { Hdr RR_Header Address uint64 } func (rr *EUI64) String() string { return rr.Hdr.String() + euiToString(rr.Address, 64) } // CAA RR. See RFC 6844. type CAA struct { Hdr RR_Header Flag uint8 Tag string Value string `dns:"octet"` } func (rr *CAA) String() string { return rr.Hdr.String() + strconv.Itoa(int(rr.Flag)) + " " + rr.Tag + " " + sprintTxtOctet(rr.Value) } // UID RR. Deprecated, IANA-Reserved. type UID struct { Hdr RR_Header Uid uint32 } func (rr *UID) String() string { return rr.Hdr.String() + strconv.FormatInt(int64(rr.Uid), 10) } // GID RR. Deprecated, IANA-Reserved. type GID struct { Hdr RR_Header Gid uint32 } func (rr *GID) String() string { return rr.Hdr.String() + strconv.FormatInt(int64(rr.Gid), 10) } // UINFO RR. Deprecated, IANA-Reserved. type UINFO struct { Hdr RR_Header Uinfo string } func (rr *UINFO) String() string { return rr.Hdr.String() + sprintTxt([]string{rr.Uinfo}) } // EID RR. See http://ana-3.lcs.mit.edu/~jnc/nimrod/dns.txt. type EID struct { Hdr RR_Header Endpoint string `dns:"hex"` } func (rr *EID) String() string { return rr.Hdr.String() + strings.ToUpper(rr.Endpoint) } // NIMLOC RR. See http://ana-3.lcs.mit.edu/~jnc/nimrod/dns.txt. type NIMLOC struct { Hdr RR_Header Locator string `dns:"hex"` } func (rr *NIMLOC) String() string { return rr.Hdr.String() + strings.ToUpper(rr.Locator) } // OPENPGPKEY RR. See RFC 7929. type OPENPGPKEY struct { Hdr RR_Header PublicKey string `dns:"base64"` } func (rr *OPENPGPKEY) String() string { return rr.Hdr.String() + rr.PublicKey } // CSYNC RR. See RFC 7477. type CSYNC struct { Hdr RR_Header Serial uint32 Flags uint16 TypeBitMap []uint16 `dns:"nsec"` } func (rr *CSYNC) String() string { s := rr.Hdr.String() + strconv.FormatInt(int64(rr.Serial), 10) + " " + strconv.Itoa(int(rr.Flags)) for i := 0; i < len(rr.TypeBitMap); i++ { s += " " + Type(rr.TypeBitMap[i]).String() } return s } func (rr *CSYNC) len() int { l := rr.Hdr.len() + 4 + 2 lastwindow := uint32(2 ^ 32 + 1) for _, t := range rr.TypeBitMap { window := t / 256 if uint32(window) != lastwindow { l += 1 + 32 } lastwindow = uint32(window) } return l } // TimeToString translates the RRSIG's incep. and expir. times to the // string representation used when printing the record. // It takes serial arithmetic (RFC 1982) into account. func TimeToString(t uint32) string { mod := ((int64(t) - time.Now().Unix()) / year68) - 1 if mod < 0 { mod = 0 } ti := time.Unix(int64(t)-(mod*year68), 0).UTC() return ti.Format("20060102150405") } // StringToTime translates the RRSIG's incep. and expir. times from // string values like "20110403154150" to an 32 bit integer. // It takes serial arithmetic (RFC 1982) into account. func StringToTime(s string) (uint32, error) { t, err := time.Parse("20060102150405", s) if err != nil { return 0, err } mod := (t.Unix() / year68) - 1 if mod < 0 { mod = 0 } return uint32(t.Unix() - (mod * year68)), nil } // saltToString converts a NSECX salt to uppercase and returns "-" when it is empty. func saltToString(s string) string { if len(s) == 0 { return "-" } return strings.ToUpper(s) } func euiToString(eui uint64, bits int) (hex string) { switch bits { case 64: hex = fmt.Sprintf("%16.16x", eui) hex = hex[0:2] + "-" + hex[2:4] + "-" + hex[4:6] + "-" + hex[6:8] + "-" + hex[8:10] + "-" + hex[10:12] + "-" + hex[12:14] + "-" + hex[14:16] case 48: hex = fmt.Sprintf("%12.12x", eui) hex = hex[0:2] + "-" + hex[2:4] + "-" + hex[4:6] + "-" + hex[6:8] + "-" + hex[8:10] + "-" + hex[10:12] } return } // copyIP returns a copy of ip. func copyIP(ip net.IP) net.IP { p := make(net.IP, len(ip)) copy(p, ip) return p } // SplitN splits a string into N sized string chunks. // This might become an exported function once. func splitN(s string, n int) []string { if len(s) < n { return []string{s} } sx := []string{} p, i := 0, n for { if i <= len(s) { sx = append(sx, s[p:i]) } else { sx = append(sx, s[p:]) break } p, i = p+n, i+n } return sx } golang-github-miekg-dns-1.0.4+ds/types_generate.go000066400000000000000000000156001325625637500221060ustar00rootroot00000000000000//+build ignore // types_generate.go is meant to run with go generate. It will use // go/{importer,types} to track down all the RR struct types. Then for each type // it will generate conversion tables (TypeToRR and TypeToString) and banal // methods (len, Header, copy) based on the struct tags. The generated source is // written to ztypes.go, and is meant to be checked into git. package main import ( "bytes" "fmt" "go/format" "go/importer" "go/types" "log" "os" "strings" "text/template" ) var skipLen = map[string]struct{}{ "NSEC": {}, "NSEC3": {}, "OPT": {}, "CSYNC": {}, } var packageHdr = ` // Code generated by "go run types_generate.go"; DO NOT EDIT. package dns import ( "encoding/base64" "net" ) ` var TypeToRR = template.Must(template.New("TypeToRR").Parse(` // TypeToRR is a map of constructors for each RR type. var TypeToRR = map[uint16]func() RR{ {{range .}}{{if ne . "RFC3597"}} Type{{.}}: func() RR { return new({{.}}) }, {{end}}{{end}} } `)) var typeToString = template.Must(template.New("typeToString").Parse(` // TypeToString is a map of strings for each RR type. var TypeToString = map[uint16]string{ {{range .}}{{if ne . "NSAPPTR"}} Type{{.}}: "{{.}}", {{end}}{{end}} TypeNSAPPTR: "NSAP-PTR", } `)) var headerFunc = template.Must(template.New("headerFunc").Parse(` {{range .}} func (rr *{{.}}) Header() *RR_Header { return &rr.Hdr } {{end}} `)) // getTypeStruct will take a type and the package scope, and return the // (innermost) struct if the type is considered a RR type (currently defined as // those structs beginning with a RR_Header, could be redefined as implementing // the RR interface). The bool return value indicates if embedded structs were // resolved. func getTypeStruct(t types.Type, scope *types.Scope) (*types.Struct, bool) { st, ok := t.Underlying().(*types.Struct) if !ok { return nil, false } if st.Field(0).Type() == scope.Lookup("RR_Header").Type() { return st, false } if st.Field(0).Anonymous() { st, _ := getTypeStruct(st.Field(0).Type(), scope) return st, true } return nil, false } func main() { // Import and type-check the package pkg, err := importer.Default().Import("github.com/miekg/dns") fatalIfErr(err) scope := pkg.Scope() // Collect constants like TypeX var numberedTypes []string for _, name := range scope.Names() { o := scope.Lookup(name) if o == nil || !o.Exported() { continue } b, ok := o.Type().(*types.Basic) if !ok || b.Kind() != types.Uint16 { continue } if !strings.HasPrefix(o.Name(), "Type") { continue } name := strings.TrimPrefix(o.Name(), "Type") if name == "PrivateRR" { continue } numberedTypes = append(numberedTypes, name) } // Collect actual types (*X) var namedTypes []string for _, name := range scope.Names() { o := scope.Lookup(name) if o == nil || !o.Exported() { continue } if st, _ := getTypeStruct(o.Type(), scope); st == nil { continue } if name == "PrivateRR" { continue } // Check if corresponding TypeX exists if scope.Lookup("Type"+o.Name()) == nil && o.Name() != "RFC3597" { log.Fatalf("Constant Type%s does not exist.", o.Name()) } namedTypes = append(namedTypes, o.Name()) } b := &bytes.Buffer{} b.WriteString(packageHdr) // Generate TypeToRR fatalIfErr(TypeToRR.Execute(b, namedTypes)) // Generate typeToString fatalIfErr(typeToString.Execute(b, numberedTypes)) // Generate headerFunc fatalIfErr(headerFunc.Execute(b, namedTypes)) // Generate len() fmt.Fprint(b, "// len() functions\n") for _, name := range namedTypes { if _, ok := skipLen[name]; ok { continue } o := scope.Lookup(name) st, isEmbedded := getTypeStruct(o.Type(), scope) if isEmbedded { continue } fmt.Fprintf(b, "func (rr *%s) len() int {\n", name) fmt.Fprintf(b, "l := rr.Hdr.len()\n") for i := 1; i < st.NumFields(); i++ { o := func(s string) { fmt.Fprintf(b, s, st.Field(i).Name()) } if _, ok := st.Field(i).Type().(*types.Slice); ok { switch st.Tag(i) { case `dns:"-"`: // ignored case `dns:"cdomain-name"`, `dns:"domain-name"`, `dns:"txt"`: o("for _, x := range rr.%s { l += len(x) + 1 }\n") default: log.Fatalln(name, st.Field(i).Name(), st.Tag(i)) } continue } switch { case st.Tag(i) == `dns:"-"`: // ignored case st.Tag(i) == `dns:"cdomain-name"`, st.Tag(i) == `dns:"domain-name"`: o("l += len(rr.%s) + 1\n") case st.Tag(i) == `dns:"octet"`: o("l += len(rr.%s)\n") case strings.HasPrefix(st.Tag(i), `dns:"size-base64`): fallthrough case st.Tag(i) == `dns:"base64"`: o("l += base64.StdEncoding.DecodedLen(len(rr.%s))\n") case strings.HasPrefix(st.Tag(i), `dns:"size-hex:`): // this has an extra field where the length is stored o("l += len(rr.%s)/2\n") case strings.HasPrefix(st.Tag(i), `dns:"size-hex`): fallthrough case st.Tag(i) == `dns:"hex"`: o("l += len(rr.%s)/2 + 1\n") case st.Tag(i) == `dns:"a"`: o("l += net.IPv4len // %s\n") case st.Tag(i) == `dns:"aaaa"`: o("l += net.IPv6len // %s\n") case st.Tag(i) == `dns:"txt"`: o("for _, t := range rr.%s { l += len(t) + 1 }\n") case st.Tag(i) == `dns:"uint48"`: o("l += 6 // %s\n") case st.Tag(i) == "": switch st.Field(i).Type().(*types.Basic).Kind() { case types.Uint8: o("l++ // %s\n") case types.Uint16: o("l += 2 // %s\n") case types.Uint32: o("l += 4 // %s\n") case types.Uint64: o("l += 8 // %s\n") case types.String: o("l += len(rr.%s) + 1\n") default: log.Fatalln(name, st.Field(i).Name()) } default: log.Fatalln(name, st.Field(i).Name(), st.Tag(i)) } } fmt.Fprintf(b, "return l }\n") } // Generate copy() fmt.Fprint(b, "// copy() functions\n") for _, name := range namedTypes { o := scope.Lookup(name) st, isEmbedded := getTypeStruct(o.Type(), scope) if isEmbedded { continue } fmt.Fprintf(b, "func (rr *%s) copy() RR {\n", name) fields := []string{"*rr.Hdr.copyHeader()"} for i := 1; i < st.NumFields(); i++ { f := st.Field(i).Name() if sl, ok := st.Field(i).Type().(*types.Slice); ok { t := sl.Underlying().String() t = strings.TrimPrefix(t, "[]") if strings.Contains(t, ".") { splits := strings.Split(t, ".") t = splits[len(splits)-1] } fmt.Fprintf(b, "%s := make([]%s, len(rr.%s)); copy(%s, rr.%s)\n", f, t, f, f, f) fields = append(fields, f) continue } if st.Field(i).Type().String() == "net.IP" { fields = append(fields, "copyIP(rr."+f+")") continue } fields = append(fields, "rr."+f) } fmt.Fprintf(b, "return &%s{%s}\n", name, strings.Join(fields, ",")) fmt.Fprintf(b, "}\n") } // gofmt res, err := format.Source(b.Bytes()) if err != nil { b.WriteTo(os.Stderr) log.Fatal(err) } // write result f, err := os.Create("ztypes.go") fatalIfErr(err) defer f.Close() f.Write(res) } func fatalIfErr(err error) { if err != nil { log.Fatal(err) } } golang-github-miekg-dns-1.0.4+ds/types_test.go000066400000000000000000000020731325625637500212730ustar00rootroot00000000000000package dns import ( "testing" ) func TestCmToM(t *testing.T) { s := cmToM(0, 0) if s != "0.00" { t.Error("0, 0") } s = cmToM(1, 0) if s != "0.01" { t.Error("1, 0") } s = cmToM(3, 1) if s != "0.30" { t.Error("3, 1") } s = cmToM(4, 2) if s != "4" { t.Error("4, 2") } s = cmToM(5, 3) if s != "50" { t.Error("5, 3") } s = cmToM(7, 5) if s != "7000" { t.Error("7, 5") } s = cmToM(9, 9) if s != "90000000" { t.Error("9, 9") } } func TestSplitN(t *testing.T) { xs := splitN("abc", 5) if len(xs) != 1 && xs[0] != "abc" { t.Errorf("failure to split abc") } s := "" for i := 0; i < 255; i++ { s += "a" } xs = splitN(s, 255) if len(xs) != 1 && xs[0] != s { t.Errorf("failure to split 255 char long string") } s += "b" xs = splitN(s, 255) if len(xs) != 2 || xs[1] != "b" { t.Errorf("failure to split 256 char long string: %d", len(xs)) } // Make s longer for i := 0; i < 255; i++ { s += "a" } xs = splitN(s, 255) if len(xs) != 3 || xs[2] != "a" { t.Errorf("failure to split 510 char long string: %d", len(xs)) } } golang-github-miekg-dns-1.0.4+ds/udp.go000066400000000000000000000046431325625637500176650ustar00rootroot00000000000000// +build !windows package dns import ( "net" "golang.org/x/net/ipv4" "golang.org/x/net/ipv6" ) // SessionUDP holds the remote address and the associated // out-of-band data. type SessionUDP struct { raddr *net.UDPAddr context []byte } // RemoteAddr returns the remote network address. func (s *SessionUDP) RemoteAddr() net.Addr { return s.raddr } // ReadFromSessionUDP acts just like net.UDPConn.ReadFrom(), but returns a session object instead of a // net.UDPAddr. func ReadFromSessionUDP(conn *net.UDPConn, b []byte) (int, *SessionUDP, error) { oob := make([]byte, 40) n, oobn, _, raddr, err := conn.ReadMsgUDP(b, oob) if err != nil { return n, nil, err } return n, &SessionUDP{raddr, oob[:oobn]}, err } // WriteToSessionUDP acts just like net.UDPConn.WriteTo(), but uses a *SessionUDP instead of a net.Addr. func WriteToSessionUDP(conn *net.UDPConn, b []byte, session *SessionUDP) (int, error) { oob := correctSource(session.context) n, _, err := conn.WriteMsgUDP(b, oob, session.raddr) return n, err } func setUDPSocketOptions(conn *net.UDPConn) error { // Try setting the flags for both families and ignore the errors unless they // both error. err6 := ipv6.NewPacketConn(conn).SetControlMessage(ipv6.FlagDst|ipv6.FlagInterface, true) err4 := ipv4.NewPacketConn(conn).SetControlMessage(ipv4.FlagDst|ipv4.FlagInterface, true) if err6 != nil && err4 != nil { return err4 } return nil } // parseDstFromOOB takes oob data and returns the destination IP. func parseDstFromOOB(oob []byte) net.IP { // Start with IPv6 and then fallback to IPv4 // TODO(fastest963): Figure out a way to prefer one or the other. Looking at // the lvl of the header for a 0 or 41 isn't cross-platform. var dst net.IP cm6 := new(ipv6.ControlMessage) if cm6.Parse(oob) == nil { dst = cm6.Dst } if dst == nil { cm4 := new(ipv4.ControlMessage) if cm4.Parse(oob) == nil { dst = cm4.Dst } } return dst } // correctSource takes oob data and returns new oob data with the Src equal to the Dst func correctSource(oob []byte) []byte { dst := parseDstFromOOB(oob) if dst == nil { return nil } // If the dst is definitely an IPv6, then use ipv6's ControlMessage to // respond otherwise use ipv4's because ipv6's marshal ignores ipv4 // addresses. if dst.To4() == nil { cm := new(ipv6.ControlMessage) cm.Src = dst oob = cm.Marshal() } else { cm := new(ipv4.ControlMessage) cm.Src = dst oob = cm.Marshal() } return oob } golang-github-miekg-dns-1.0.4+ds/udp_test.go000066400000000000000000000074761325625637500207330ustar00rootroot00000000000000// +build linux,!appengine package dns import ( "bytes" "net" "strings" "testing" "time" "golang.org/x/net/ipv4" "golang.org/x/net/ipv6" ) func TestSetUDPSocketOptions(t *testing.T) { // returns an error if we cannot resolve that address testFamily := func(n, addr string) error { a, err := net.ResolveUDPAddr(n, addr) if err != nil { return err } c, err := net.ListenUDP(n, a) if err != nil { return err } if err := setUDPSocketOptions(c); err != nil { t.Fatalf("failed to set socket options: %v", err) } ch := make(chan *SessionUDP) go func() { // Set some deadline so this goroutine doesn't hang forever c.SetReadDeadline(time.Now().Add(time.Minute)) b := make([]byte, 1) _, sess, err := ReadFromSessionUDP(c, b) if err != nil { t.Fatalf("failed to read from conn: %v", err) } ch <- sess }() c2, err := net.Dial("udp", c.LocalAddr().String()) if err != nil { t.Fatalf("failed to dial udp: %v", err) } if _, err := c2.Write([]byte{1}); err != nil { t.Fatalf("failed to write to conn: %v", err) } sess := <-ch if len(sess.context) == 0 { t.Fatalf("empty session context: %v", sess) } ip := parseDstFromOOB(sess.context) if ip == nil { t.Fatalf("failed to parse dst: %v", sess) } if !strings.Contains(c.LocalAddr().String(), ip.String()) { t.Fatalf("dst was different than listen addr: %v != %v", ip.String(), c.LocalAddr().String()) } return nil } // we require that ipv4 be supported if err := testFamily("udp4", "127.0.0.1:0"); err != nil { t.Fatalf("failed to test socket options on IPv4: %v", err) } // IPv6 might not be supported so these will just log if err := testFamily("udp6", "[::1]:0"); err != nil { t.Logf("failed to test socket options on IPv6-only: %v", err) } if err := testFamily("udp", "[::1]:0"); err != nil { t.Logf("failed to test socket options on IPv6/IPv4: %v", err) } } func TestParseDstFromOOB(t *testing.T) { // dst is :ffff:100.100.100.100 oob := []byte{36, 0, 0, 0, 0, 0, 0, 0, 41, 0, 0, 0, 50, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 100, 100, 100, 100, 2, 0, 0, 0} dst := parseDstFromOOB(oob) dst4 := dst.To4() if dst4 == nil { t.Errorf("failed to parse IPv4 in IPv6: %v", dst) } else if dst4.String() != "100.100.100.100" { t.Errorf("unexpected IPv4: %v", dst4) } // dst is 2001:db8::1 oob = []byte{36, 0, 0, 0, 0, 0, 0, 0, 41, 0, 0, 0, 50, 0, 0, 0, 32, 1, 13, 184, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0} dst = parseDstFromOOB(oob) dst6 := dst.To16() if dst6 == nil { t.Errorf("failed to parse IPv6: %v", dst) } else if dst6.String() != "2001:db8::1" { t.Errorf("unexpected IPv6: %v", dst4) } // dst is 100.100.100.100 but was received on 10.10.10.10 oob = []byte{28, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 2, 0, 0, 0, 10, 10, 10, 10, 100, 100, 100, 100, 0, 0, 0, 0} dst = parseDstFromOOB(oob) dst4 = dst.To4() if dst4 == nil { t.Errorf("failed to parse IPv4: %v", dst) } else if dst4.String() != "100.100.100.100" { t.Errorf("unexpected IPv4: %v", dst4) } } func TestCorrectSource(t *testing.T) { // dst is :ffff:100.100.100.100 which should be counted as IPv4 oob := []byte{36, 0, 0, 0, 0, 0, 0, 0, 41, 0, 0, 0, 50, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 100, 100, 100, 100, 2, 0, 0, 0} soob := correctSource(oob) cm4 := new(ipv4.ControlMessage) cm4.Src = net.ParseIP("100.100.100.100") if !bytes.Equal(soob, cm4.Marshal()) { t.Errorf("unexpected oob for ipv4 address: %v", soob) } // dst is 2001:db8::1 oob = []byte{36, 0, 0, 0, 0, 0, 0, 0, 41, 0, 0, 0, 50, 0, 0, 0, 32, 1, 13, 184, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0} soob = correctSource(oob) cm6 := new(ipv6.ControlMessage) cm6.Src = net.ParseIP("2001:db8::1") if !bytes.Equal(soob, cm6.Marshal()) { t.Errorf("unexpected oob for IPv6 address: %v", soob) } } golang-github-miekg-dns-1.0.4+ds/udp_windows.go000066400000000000000000000023011325625637500214240ustar00rootroot00000000000000// +build windows package dns import "net" // SessionUDP holds the remote address type SessionUDP struct { raddr *net.UDPAddr } // RemoteAddr returns the remote network address. func (s *SessionUDP) RemoteAddr() net.Addr { return s.raddr } // ReadFromSessionUDP acts just like net.UDPConn.ReadFrom(), but returns a session object instead of a // net.UDPAddr. // TODO(fastest963): Once go1.10 is released, use ReadMsgUDP. func ReadFromSessionUDP(conn *net.UDPConn, b []byte) (int, *SessionUDP, error) { n, raddr, err := conn.ReadFrom(b) if err != nil { return n, nil, err } session := &SessionUDP{raddr.(*net.UDPAddr)} return n, session, err } // WriteToSessionUDP acts just like net.UDPConn.WriteTo(), but uses a *SessionUDP instead of a net.Addr. // TODO(fastest963): Once go1.10 is released, use WriteMsgUDP. func WriteToSessionUDP(conn *net.UDPConn, b []byte, session *SessionUDP) (int, error) { n, err := conn.WriteTo(b, session.raddr) return n, err } // TODO(fastest963): Once go1.10 is released and we can use *MsgUDP methods // use the standard method in udp.go for these. func setUDPSocketOptions(*net.UDPConn) error { return nil } func parseDstFromOOB([]byte, net.IP) net.IP { return nil } golang-github-miekg-dns-1.0.4+ds/update.go000066400000000000000000000061221325625637500203510ustar00rootroot00000000000000package dns // NameUsed sets the RRs in the prereq section to // "Name is in use" RRs. RFC 2136 section 2.4.4. func (u *Msg) NameUsed(rr []RR) { if u.Answer == nil { u.Answer = make([]RR, 0, len(rr)) } for _, r := range rr { u.Answer = append(u.Answer, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: TypeANY, Class: ClassANY}}) } } // NameNotUsed sets the RRs in the prereq section to // "Name is in not use" RRs. RFC 2136 section 2.4.5. func (u *Msg) NameNotUsed(rr []RR) { if u.Answer == nil { u.Answer = make([]RR, 0, len(rr)) } for _, r := range rr { u.Answer = append(u.Answer, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: TypeANY, Class: ClassNONE}}) } } // Used sets the RRs in the prereq section to // "RRset exists (value dependent -- with rdata)" RRs. RFC 2136 section 2.4.2. func (u *Msg) Used(rr []RR) { if len(u.Question) == 0 { panic("dns: empty question section") } if u.Answer == nil { u.Answer = make([]RR, 0, len(rr)) } for _, r := range rr { r.Header().Class = u.Question[0].Qclass u.Answer = append(u.Answer, r) } } // RRsetUsed sets the RRs in the prereq section to // "RRset exists (value independent -- no rdata)" RRs. RFC 2136 section 2.4.1. func (u *Msg) RRsetUsed(rr []RR) { if u.Answer == nil { u.Answer = make([]RR, 0, len(rr)) } for _, r := range rr { u.Answer = append(u.Answer, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: r.Header().Rrtype, Class: ClassANY}}) } } // RRsetNotUsed sets the RRs in the prereq section to // "RRset does not exist" RRs. RFC 2136 section 2.4.3. func (u *Msg) RRsetNotUsed(rr []RR) { if u.Answer == nil { u.Answer = make([]RR, 0, len(rr)) } for _, r := range rr { u.Answer = append(u.Answer, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: r.Header().Rrtype, Class: ClassNONE}}) } } // Insert creates a dynamic update packet that adds an complete RRset, see RFC 2136 section 2.5.1. func (u *Msg) Insert(rr []RR) { if len(u.Question) == 0 { panic("dns: empty question section") } if u.Ns == nil { u.Ns = make([]RR, 0, len(rr)) } for _, r := range rr { r.Header().Class = u.Question[0].Qclass u.Ns = append(u.Ns, r) } } // RemoveRRset creates a dynamic update packet that deletes an RRset, see RFC 2136 section 2.5.2. func (u *Msg) RemoveRRset(rr []RR) { if u.Ns == nil { u.Ns = make([]RR, 0, len(rr)) } for _, r := range rr { u.Ns = append(u.Ns, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: r.Header().Rrtype, Class: ClassANY}}) } } // RemoveName creates a dynamic update packet that deletes all RRsets of a name, see RFC 2136 section 2.5.3 func (u *Msg) RemoveName(rr []RR) { if u.Ns == nil { u.Ns = make([]RR, 0, len(rr)) } for _, r := range rr { u.Ns = append(u.Ns, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: TypeANY, Class: ClassANY}}) } } // Remove creates a dynamic update packet deletes RR from a RRSset, see RFC 2136 section 2.5.4 func (u *Msg) Remove(rr []RR) { if u.Ns == nil { u.Ns = make([]RR, 0, len(rr)) } for _, r := range rr { r.Header().Class = ClassNONE r.Header().Ttl = 0 u.Ns = append(u.Ns, r) } } golang-github-miekg-dns-1.0.4+ds/update_test.go000066400000000000000000000104211325625637500214050ustar00rootroot00000000000000package dns import ( "bytes" "testing" ) func TestDynamicUpdateParsing(t *testing.T) { prefix := "example.com. IN " for _, typ := range TypeToString { if typ == "OPT" || typ == "AXFR" || typ == "IXFR" || typ == "ANY" || typ == "TKEY" || typ == "TSIG" || typ == "ISDN" || typ == "UNSPEC" || typ == "NULL" || typ == "ATMA" || typ == "Reserved" || typ == "None" || typ == "NXT" || typ == "MAILB" || typ == "MAILA" { continue } if _, err := NewRR(prefix + typ); err != nil { t.Errorf("failure to parse: %s %s: %v", prefix, typ, err) } } } func TestDynamicUpdateUnpack(t *testing.T) { // From https://github.com/miekg/dns/issues/150#issuecomment-62296803 // It should be an update message for the zone "example.", // deleting the A RRset "example." and then adding an A record at "example.". // class ANY, TYPE A buf := []byte{171, 68, 40, 0, 0, 1, 0, 0, 0, 2, 0, 0, 7, 101, 120, 97, 109, 112, 108, 101, 0, 0, 6, 0, 1, 192, 12, 0, 1, 0, 255, 0, 0, 0, 0, 0, 0, 192, 12, 0, 1, 0, 1, 0, 0, 0, 0, 0, 4, 127, 0, 0, 1} msg := new(Msg) err := msg.Unpack(buf) if err != nil { t.Errorf("failed to unpack: %v\n%s", err, msg.String()) } } func TestDynamicUpdateZeroRdataUnpack(t *testing.T) { m := new(Msg) rr := &RR_Header{Name: ".", Rrtype: 0, Class: 1, Ttl: ^uint32(0), Rdlength: 0} m.Answer = []RR{rr, rr, rr, rr, rr} m.Ns = m.Answer for n, s := range TypeToString { rr.Rrtype = n bytes, err := m.Pack() if err != nil { t.Errorf("failed to pack %s: %v", s, err) continue } if err := new(Msg).Unpack(bytes); err != nil { t.Errorf("failed to unpack %s: %v", s, err) } } } func TestRemoveRRset(t *testing.T) { // Should add a zero data RR in Class ANY with a TTL of 0 // for each set mentioned in the RRs provided to it. rr := testRR(". 100 IN A 127.0.0.1") m := new(Msg) m.Ns = []RR{&RR_Header{Name: ".", Rrtype: TypeA, Class: ClassANY, Ttl: 0, Rdlength: 0}} expectstr := m.String() expect, err := m.Pack() if err != nil { t.Fatalf("error packing expected msg: %v", err) } m.Ns = nil m.RemoveRRset([]RR{rr}) actual, err := m.Pack() if err != nil { t.Fatalf("error packing actual msg: %v", err) } if !bytes.Equal(actual, expect) { tmp := new(Msg) if err := tmp.Unpack(actual); err != nil { t.Fatalf("error unpacking actual msg: %v\nexpected: %v\ngot: %v\n", err, expect, actual) } t.Errorf("expected msg:\n%s", expectstr) t.Errorf("actual msg:\n%v", tmp) } } func TestPreReqAndRemovals(t *testing.T) { // Build a list of multiple prereqs and then somes removes followed by an insert. // We should be able to add multiple prereqs and updates. m := new(Msg) m.SetUpdate("example.org.") m.Id = 1234 // Use a full set of RRs each time, so we are sure the rdata is stripped. rrName1 := testRR("name_used. 3600 IN A 127.0.0.1") rrName2 := testRR("name_not_used. 3600 IN A 127.0.0.1") rrRemove1 := testRR("remove1. 3600 IN A 127.0.0.1") rrRemove2 := testRR("remove2. 3600 IN A 127.0.0.1") rrRemove3 := testRR("remove3. 3600 IN A 127.0.0.1") rrInsert := testRR("insert. 3600 IN A 127.0.0.1") rrRrset1 := testRR("rrset_used1. 3600 IN A 127.0.0.1") rrRrset2 := testRR("rrset_used2. 3600 IN A 127.0.0.1") rrRrset3 := testRR("rrset_not_used. 3600 IN A 127.0.0.1") // Handle the prereqs. m.NameUsed([]RR{rrName1}) m.NameNotUsed([]RR{rrName2}) m.RRsetUsed([]RR{rrRrset1}) m.Used([]RR{rrRrset2}) m.RRsetNotUsed([]RR{rrRrset3}) // and now the updates. m.RemoveName([]RR{rrRemove1}) m.RemoveRRset([]RR{rrRemove2}) m.Remove([]RR{rrRemove3}) m.Insert([]RR{rrInsert}) // This test function isn't a Example function because we print these RR with tabs at the // end and the Example function trim these, thus they never match. // TODO(miek): don't print these tabs and make this into an Example function. expect := `;; opcode: UPDATE, status: NOERROR, id: 1234 ;; flags:; QUERY: 1, ANSWER: 5, AUTHORITY: 4, ADDITIONAL: 0 ;; QUESTION SECTION: ;example.org. IN SOA ;; ANSWER SECTION: name_used. 0 CLASS255 ANY name_not_used. 0 NONE ANY rrset_used1. 0 CLASS255 A rrset_used2. 3600 IN A 127.0.0.1 rrset_not_used. 0 NONE A ;; AUTHORITY SECTION: remove1. 0 CLASS255 ANY remove2. 0 CLASS255 A remove3. 0 NONE A 127.0.0.1 insert. 3600 IN A 127.0.0.1 ` if m.String() != expect { t.Errorf("expected msg:\n%s", expect) t.Errorf("actual msg:\n%v", m.String()) } } golang-github-miekg-dns-1.0.4+ds/version.go000066400000000000000000000004221325625637500205510ustar00rootroot00000000000000package dns import "fmt" // Version is current version of this library. var Version = V{1, 0, 4} // V holds the version of this library. type V struct { Major, Minor, Patch int } func (v V) String() string { return fmt.Sprintf("%d.%d.%d", v.Major, v.Minor, v.Patch) } golang-github-miekg-dns-1.0.4+ds/version_test.go000066400000000000000000000002641325625637500216140ustar00rootroot00000000000000package dns import "testing" func TestVersion(t *testing.T) { v := V{1, 0, 0} if x := v.String(); x != "1.0.0" { t.Fatalf("Failed to convert version %v, got: %s", v, x) } } golang-github-miekg-dns-1.0.4+ds/xfr.go000066400000000000000000000145531325625637500176750ustar00rootroot00000000000000package dns import ( "fmt" "time" ) // Envelope is used when doing a zone transfer with a remote server. type Envelope struct { RR []RR // The set of RRs in the answer section of the xfr reply message. Error error // If something went wrong, this contains the error. } // A Transfer defines parameters that are used during a zone transfer. type Transfer struct { *Conn DialTimeout time.Duration // net.DialTimeout, defaults to 2 seconds ReadTimeout time.Duration // net.Conn.SetReadTimeout value for connections, defaults to 2 seconds WriteTimeout time.Duration // net.Conn.SetWriteTimeout value for connections, defaults to 2 seconds TsigSecret map[string]string // Secret(s) for Tsig map[], zonename must be in canonical form (lowercase, fqdn, see RFC 4034 Section 6.2) tsigTimersOnly bool } // Think we need to away to stop the transfer // In performs an incoming transfer with the server in a. // If you would like to set the source IP, or some other attribute // of a Dialer for a Transfer, you can do so by specifying the attributes // in the Transfer.Conn: // // d := net.Dialer{LocalAddr: transfer_source} // con, err := d.Dial("tcp", master) // dnscon := &dns.Conn{Conn:con} // transfer = &dns.Transfer{Conn: dnscon} // channel, err := transfer.In(message, master) // func (t *Transfer) In(q *Msg, a string) (env chan *Envelope, err error) { timeout := dnsTimeout if t.DialTimeout != 0 { timeout = t.DialTimeout } if t.Conn == nil { t.Conn, err = DialTimeout("tcp", a, timeout) if err != nil { return nil, err } } if err := t.WriteMsg(q); err != nil { return nil, err } env = make(chan *Envelope) go func() { if q.Question[0].Qtype == TypeAXFR { go t.inAxfr(q, env) return } if q.Question[0].Qtype == TypeIXFR { go t.inIxfr(q, env) return } }() return env, nil } func (t *Transfer) inAxfr(q *Msg, c chan *Envelope) { first := true defer t.Close() defer close(c) timeout := dnsTimeout if t.ReadTimeout != 0 { timeout = t.ReadTimeout } for { t.Conn.SetReadDeadline(time.Now().Add(timeout)) in, err := t.ReadMsg() if err != nil { c <- &Envelope{nil, err} return } if q.Id != in.Id { c <- &Envelope{in.Answer, ErrId} return } if first { if in.Rcode != RcodeSuccess { c <- &Envelope{in.Answer, &Error{err: fmt.Sprintf(errXFR, in.Rcode)}} return } if !isSOAFirst(in) { c <- &Envelope{in.Answer, ErrSoa} return } first = !first // only one answer that is SOA, receive more if len(in.Answer) == 1 { t.tsigTimersOnly = true c <- &Envelope{in.Answer, nil} continue } } if !first { t.tsigTimersOnly = true // Subsequent envelopes use this. if isSOALast(in) { c <- &Envelope{in.Answer, nil} return } c <- &Envelope{in.Answer, nil} } } } func (t *Transfer) inIxfr(q *Msg, c chan *Envelope) { serial := uint32(0) // The first serial seen is the current server serial axfr := true n := 0 qser := q.Ns[0].(*SOA).Serial defer t.Close() defer close(c) timeout := dnsTimeout if t.ReadTimeout != 0 { timeout = t.ReadTimeout } for { t.SetReadDeadline(time.Now().Add(timeout)) in, err := t.ReadMsg() if err != nil { c <- &Envelope{nil, err} return } if q.Id != in.Id { c <- &Envelope{in.Answer, ErrId} return } if in.Rcode != RcodeSuccess { c <- &Envelope{in.Answer, &Error{err: fmt.Sprintf(errXFR, in.Rcode)}} return } if n == 0 { // Check if the returned answer is ok if !isSOAFirst(in) { c <- &Envelope{in.Answer, ErrSoa} return } // This serial is important serial = in.Answer[0].(*SOA).Serial // Check if there are no changes in zone if qser >= serial { c <- &Envelope{in.Answer, nil} return } } // Now we need to check each message for SOA records, to see what we need to do t.tsigTimersOnly = true for _, rr := range in.Answer { if v, ok := rr.(*SOA); ok { if v.Serial == serial { n++ // quit if it's a full axfr or the the servers' SOA is repeated the third time if axfr && n == 2 || n == 3 { c <- &Envelope{in.Answer, nil} return } } else if axfr { // it's an ixfr axfr = false } } } c <- &Envelope{in.Answer, nil} } } // Out performs an outgoing transfer with the client connecting in w. // Basic use pattern: // // ch := make(chan *dns.Envelope) // tr := new(dns.Transfer) // go tr.Out(w, r, ch) // ch <- &dns.Envelope{RR: []dns.RR{soa, rr1, rr2, rr3, soa}} // close(ch) // w.Hijack() // // w.Close() // Client closes connection // // The server is responsible for sending the correct sequence of RRs through the // channel ch. func (t *Transfer) Out(w ResponseWriter, q *Msg, ch chan *Envelope) error { for x := range ch { r := new(Msg) // Compress? r.SetReply(q) r.Authoritative = true // assume it fits TODO(miek): fix r.Answer = append(r.Answer, x.RR...) if err := w.WriteMsg(r); err != nil { return err } } w.TsigTimersOnly(true) return nil } // ReadMsg reads a message from the transfer connection t. func (t *Transfer) ReadMsg() (*Msg, error) { m := new(Msg) p := make([]byte, MaxMsgSize) n, err := t.Read(p) if err != nil && n == 0 { return nil, err } p = p[:n] if err := m.Unpack(p); err != nil { return nil, err } if ts := m.IsTsig(); ts != nil && t.TsigSecret != nil { if _, ok := t.TsigSecret[ts.Hdr.Name]; !ok { return m, ErrSecret } // Need to work on the original message p, as that was used to calculate the tsig. err = TsigVerify(p, t.TsigSecret[ts.Hdr.Name], t.tsigRequestMAC, t.tsigTimersOnly) t.tsigRequestMAC = ts.MAC } return m, err } // WriteMsg writes a message through the transfer connection t. func (t *Transfer) WriteMsg(m *Msg) (err error) { var out []byte if ts := m.IsTsig(); ts != nil && t.TsigSecret != nil { if _, ok := t.TsigSecret[ts.Hdr.Name]; !ok { return ErrSecret } out, t.tsigRequestMAC, err = TsigGenerate(m, t.TsigSecret[ts.Hdr.Name], t.tsigRequestMAC, t.tsigTimersOnly) } else { out, err = m.Pack() } if err != nil { return err } if _, err = t.Write(out); err != nil { return err } return nil } func isSOAFirst(in *Msg) bool { if len(in.Answer) > 0 { return in.Answer[0].Header().Rrtype == TypeSOA } return false } func isSOALast(in *Msg) bool { if len(in.Answer) > 0 { return in.Answer[len(in.Answer)-1].Header().Rrtype == TypeSOA } return false } const errXFR = "bad xfr rcode: %d" golang-github-miekg-dns-1.0.4+ds/zcompress.go000066400000000000000000000055521325625637500211220ustar00rootroot00000000000000// Code generated by "go run compress_generate.go"; DO NOT EDIT. package dns func compressionLenHelperType(c map[string]int, r RR) { switch x := r.(type) { case *AFSDB: compressionLenHelper(c, x.Hostname) case *CNAME: compressionLenHelper(c, x.Target) case *DNAME: compressionLenHelper(c, x.Target) case *HIP: for i := range x.RendezvousServers { compressionLenHelper(c, x.RendezvousServers[i]) } case *KX: compressionLenHelper(c, x.Exchanger) case *LP: compressionLenHelper(c, x.Fqdn) case *MB: compressionLenHelper(c, x.Mb) case *MD: compressionLenHelper(c, x.Md) case *MF: compressionLenHelper(c, x.Mf) case *MG: compressionLenHelper(c, x.Mg) case *MINFO: compressionLenHelper(c, x.Rmail) compressionLenHelper(c, x.Email) case *MR: compressionLenHelper(c, x.Mr) case *MX: compressionLenHelper(c, x.Mx) case *NAPTR: compressionLenHelper(c, x.Replacement) case *NS: compressionLenHelper(c, x.Ns) case *NSAPPTR: compressionLenHelper(c, x.Ptr) case *NSEC: compressionLenHelper(c, x.NextDomain) case *PTR: compressionLenHelper(c, x.Ptr) case *PX: compressionLenHelper(c, x.Map822) compressionLenHelper(c, x.Mapx400) case *RP: compressionLenHelper(c, x.Mbox) compressionLenHelper(c, x.Txt) case *RRSIG: compressionLenHelper(c, x.SignerName) case *RT: compressionLenHelper(c, x.Host) case *SIG: compressionLenHelper(c, x.SignerName) case *SOA: compressionLenHelper(c, x.Ns) compressionLenHelper(c, x.Mbox) case *SRV: compressionLenHelper(c, x.Target) case *TALINK: compressionLenHelper(c, x.PreviousName) compressionLenHelper(c, x.NextName) case *TKEY: compressionLenHelper(c, x.Algorithm) case *TSIG: compressionLenHelper(c, x.Algorithm) } } func compressionLenSearchType(c map[string]int, r RR) (int, bool) { switch x := r.(type) { case *AFSDB: k1, ok1 := compressionLenSearch(c, x.Hostname) return k1, ok1 case *CNAME: k1, ok1 := compressionLenSearch(c, x.Target) return k1, ok1 case *MB: k1, ok1 := compressionLenSearch(c, x.Mb) return k1, ok1 case *MD: k1, ok1 := compressionLenSearch(c, x.Md) return k1, ok1 case *MF: k1, ok1 := compressionLenSearch(c, x.Mf) return k1, ok1 case *MG: k1, ok1 := compressionLenSearch(c, x.Mg) return k1, ok1 case *MINFO: k1, ok1 := compressionLenSearch(c, x.Rmail) k2, ok2 := compressionLenSearch(c, x.Email) return k1 + k2, ok1 && ok2 case *MR: k1, ok1 := compressionLenSearch(c, x.Mr) return k1, ok1 case *MX: k1, ok1 := compressionLenSearch(c, x.Mx) return k1, ok1 case *NS: k1, ok1 := compressionLenSearch(c, x.Ns) return k1, ok1 case *PTR: k1, ok1 := compressionLenSearch(c, x.Ptr) return k1, ok1 case *RT: k1, ok1 := compressionLenSearch(c, x.Host) return k1, ok1 case *SOA: k1, ok1 := compressionLenSearch(c, x.Ns) k2, ok2 := compressionLenSearch(c, x.Mbox) return k1 + k2, ok1 && ok2 } return 0, false } golang-github-miekg-dns-1.0.4+ds/zmsg.go000066400000000000000000002301411325625637500200470ustar00rootroot00000000000000// Code generated by "go run msg_generate.go"; DO NOT EDIT. package dns // pack*() functions func (rr *A) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packDataA(rr.A, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *AAAA) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packDataAAAA(rr.AAAA, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *AFSDB) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Subtype, msg, off) if err != nil { return off, err } off, err = PackDomainName(rr.Hostname, msg, off, compression, compress) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *ANY) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *AVC) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packStringTxt(rr.Txt, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *CAA) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint8(rr.Flag, msg, off) if err != nil { return off, err } off, err = packString(rr.Tag, msg, off) if err != nil { return off, err } off, err = packStringOctet(rr.Value, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *CDNSKEY) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Flags, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Protocol, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Algorithm, msg, off) if err != nil { return off, err } off, err = packStringBase64(rr.PublicKey, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *CDS) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.KeyTag, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Algorithm, msg, off) if err != nil { return off, err } off, err = packUint8(rr.DigestType, msg, off) if err != nil { return off, err } off, err = packStringHex(rr.Digest, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *CERT) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Type, msg, off) if err != nil { return off, err } off, err = packUint16(rr.KeyTag, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Algorithm, msg, off) if err != nil { return off, err } off, err = packStringBase64(rr.Certificate, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *CNAME) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.Target, msg, off, compression, compress) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *CSYNC) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint32(rr.Serial, msg, off) if err != nil { return off, err } off, err = packUint16(rr.Flags, msg, off) if err != nil { return off, err } off, err = packDataNsec(rr.TypeBitMap, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *DHCID) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packStringBase64(rr.Digest, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *DLV) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.KeyTag, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Algorithm, msg, off) if err != nil { return off, err } off, err = packUint8(rr.DigestType, msg, off) if err != nil { return off, err } off, err = packStringHex(rr.Digest, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *DNAME) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.Target, msg, off, compression, false) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *DNSKEY) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Flags, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Protocol, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Algorithm, msg, off) if err != nil { return off, err } off, err = packStringBase64(rr.PublicKey, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *DS) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.KeyTag, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Algorithm, msg, off) if err != nil { return off, err } off, err = packUint8(rr.DigestType, msg, off) if err != nil { return off, err } off, err = packStringHex(rr.Digest, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *EID) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packStringHex(rr.Endpoint, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *EUI48) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint48(rr.Address, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *EUI64) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint64(rr.Address, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *GID) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint32(rr.Gid, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *GPOS) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packString(rr.Longitude, msg, off) if err != nil { return off, err } off, err = packString(rr.Latitude, msg, off) if err != nil { return off, err } off, err = packString(rr.Altitude, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *HINFO) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packString(rr.Cpu, msg, off) if err != nil { return off, err } off, err = packString(rr.Os, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *HIP) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint8(rr.HitLength, msg, off) if err != nil { return off, err } off, err = packUint8(rr.PublicKeyAlgorithm, msg, off) if err != nil { return off, err } off, err = packUint16(rr.PublicKeyLength, msg, off) if err != nil { return off, err } off, err = packStringHex(rr.Hit, msg, off) if err != nil { return off, err } off, err = packStringBase64(rr.PublicKey, msg, off) if err != nil { return off, err } off, err = packDataDomainNames(rr.RendezvousServers, msg, off, compression, compress) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *KEY) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Flags, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Protocol, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Algorithm, msg, off) if err != nil { return off, err } off, err = packStringBase64(rr.PublicKey, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *KX) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Preference, msg, off) if err != nil { return off, err } off, err = PackDomainName(rr.Exchanger, msg, off, compression, false) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *L32) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Preference, msg, off) if err != nil { return off, err } off, err = packDataA(rr.Locator32, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *L64) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Preference, msg, off) if err != nil { return off, err } off, err = packUint64(rr.Locator64, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *LOC) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint8(rr.Version, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Size, msg, off) if err != nil { return off, err } off, err = packUint8(rr.HorizPre, msg, off) if err != nil { return off, err } off, err = packUint8(rr.VertPre, msg, off) if err != nil { return off, err } off, err = packUint32(rr.Latitude, msg, off) if err != nil { return off, err } off, err = packUint32(rr.Longitude, msg, off) if err != nil { return off, err } off, err = packUint32(rr.Altitude, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *LP) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Preference, msg, off) if err != nil { return off, err } off, err = PackDomainName(rr.Fqdn, msg, off, compression, false) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *MB) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.Mb, msg, off, compression, compress) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *MD) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.Md, msg, off, compression, compress) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *MF) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.Mf, msg, off, compression, compress) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *MG) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.Mg, msg, off, compression, compress) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *MINFO) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.Rmail, msg, off, compression, compress) if err != nil { return off, err } off, err = PackDomainName(rr.Email, msg, off, compression, compress) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *MR) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.Mr, msg, off, compression, compress) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *MX) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Preference, msg, off) if err != nil { return off, err } off, err = PackDomainName(rr.Mx, msg, off, compression, compress) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *NAPTR) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Order, msg, off) if err != nil { return off, err } off, err = packUint16(rr.Preference, msg, off) if err != nil { return off, err } off, err = packString(rr.Flags, msg, off) if err != nil { return off, err } off, err = packString(rr.Service, msg, off) if err != nil { return off, err } off, err = packString(rr.Regexp, msg, off) if err != nil { return off, err } off, err = PackDomainName(rr.Replacement, msg, off, compression, false) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *NID) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Preference, msg, off) if err != nil { return off, err } off, err = packUint64(rr.NodeID, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *NIMLOC) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packStringHex(rr.Locator, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *NINFO) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packStringTxt(rr.ZSData, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *NS) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.Ns, msg, off, compression, compress) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *NSAPPTR) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.Ptr, msg, off, compression, false) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *NSEC) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.NextDomain, msg, off, compression, false) if err != nil { return off, err } off, err = packDataNsec(rr.TypeBitMap, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *NSEC3) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint8(rr.Hash, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Flags, msg, off) if err != nil { return off, err } off, err = packUint16(rr.Iterations, msg, off) if err != nil { return off, err } off, err = packUint8(rr.SaltLength, msg, off) if err != nil { return off, err } // Only pack salt if value is not "-", i.e. empty if rr.Salt != "-" { off, err = packStringHex(rr.Salt, msg, off) if err != nil { return off, err } } off, err = packUint8(rr.HashLength, msg, off) if err != nil { return off, err } off, err = packStringBase32(rr.NextDomain, msg, off) if err != nil { return off, err } off, err = packDataNsec(rr.TypeBitMap, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *NSEC3PARAM) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint8(rr.Hash, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Flags, msg, off) if err != nil { return off, err } off, err = packUint16(rr.Iterations, msg, off) if err != nil { return off, err } off, err = packUint8(rr.SaltLength, msg, off) if err != nil { return off, err } // Only pack salt if value is not "-", i.e. empty if rr.Salt != "-" { off, err = packStringHex(rr.Salt, msg, off) if err != nil { return off, err } } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *OPENPGPKEY) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packStringBase64(rr.PublicKey, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *OPT) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packDataOpt(rr.Option, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *PTR) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.Ptr, msg, off, compression, compress) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *PX) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Preference, msg, off) if err != nil { return off, err } off, err = PackDomainName(rr.Map822, msg, off, compression, false) if err != nil { return off, err } off, err = PackDomainName(rr.Mapx400, msg, off, compression, false) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *RFC3597) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packStringHex(rr.Rdata, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *RKEY) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Flags, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Protocol, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Algorithm, msg, off) if err != nil { return off, err } off, err = packStringBase64(rr.PublicKey, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *RP) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.Mbox, msg, off, compression, false) if err != nil { return off, err } off, err = PackDomainName(rr.Txt, msg, off, compression, false) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *RRSIG) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.TypeCovered, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Algorithm, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Labels, msg, off) if err != nil { return off, err } off, err = packUint32(rr.OrigTtl, msg, off) if err != nil { return off, err } off, err = packUint32(rr.Expiration, msg, off) if err != nil { return off, err } off, err = packUint32(rr.Inception, msg, off) if err != nil { return off, err } off, err = packUint16(rr.KeyTag, msg, off) if err != nil { return off, err } off, err = PackDomainName(rr.SignerName, msg, off, compression, false) if err != nil { return off, err } off, err = packStringBase64(rr.Signature, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *RT) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Preference, msg, off) if err != nil { return off, err } off, err = PackDomainName(rr.Host, msg, off, compression, compress) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *SIG) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.TypeCovered, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Algorithm, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Labels, msg, off) if err != nil { return off, err } off, err = packUint32(rr.OrigTtl, msg, off) if err != nil { return off, err } off, err = packUint32(rr.Expiration, msg, off) if err != nil { return off, err } off, err = packUint32(rr.Inception, msg, off) if err != nil { return off, err } off, err = packUint16(rr.KeyTag, msg, off) if err != nil { return off, err } off, err = PackDomainName(rr.SignerName, msg, off, compression, false) if err != nil { return off, err } off, err = packStringBase64(rr.Signature, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *SMIMEA) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint8(rr.Usage, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Selector, msg, off) if err != nil { return off, err } off, err = packUint8(rr.MatchingType, msg, off) if err != nil { return off, err } off, err = packStringHex(rr.Certificate, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *SOA) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.Ns, msg, off, compression, compress) if err != nil { return off, err } off, err = PackDomainName(rr.Mbox, msg, off, compression, compress) if err != nil { return off, err } off, err = packUint32(rr.Serial, msg, off) if err != nil { return off, err } off, err = packUint32(rr.Refresh, msg, off) if err != nil { return off, err } off, err = packUint32(rr.Retry, msg, off) if err != nil { return off, err } off, err = packUint32(rr.Expire, msg, off) if err != nil { return off, err } off, err = packUint32(rr.Minttl, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *SPF) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packStringTxt(rr.Txt, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *SRV) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Priority, msg, off) if err != nil { return off, err } off, err = packUint16(rr.Weight, msg, off) if err != nil { return off, err } off, err = packUint16(rr.Port, msg, off) if err != nil { return off, err } off, err = PackDomainName(rr.Target, msg, off, compression, false) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *SSHFP) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint8(rr.Algorithm, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Type, msg, off) if err != nil { return off, err } off, err = packStringHex(rr.FingerPrint, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *TA) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.KeyTag, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Algorithm, msg, off) if err != nil { return off, err } off, err = packUint8(rr.DigestType, msg, off) if err != nil { return off, err } off, err = packStringHex(rr.Digest, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *TALINK) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.PreviousName, msg, off, compression, false) if err != nil { return off, err } off, err = PackDomainName(rr.NextName, msg, off, compression, false) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *TKEY) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.Algorithm, msg, off, compression, false) if err != nil { return off, err } off, err = packUint32(rr.Inception, msg, off) if err != nil { return off, err } off, err = packUint32(rr.Expiration, msg, off) if err != nil { return off, err } off, err = packUint16(rr.Mode, msg, off) if err != nil { return off, err } off, err = packUint16(rr.Error, msg, off) if err != nil { return off, err } off, err = packUint16(rr.KeySize, msg, off) if err != nil { return off, err } off, err = packStringHex(rr.Key, msg, off) if err != nil { return off, err } off, err = packUint16(rr.OtherLen, msg, off) if err != nil { return off, err } off, err = packStringHex(rr.OtherData, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *TLSA) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint8(rr.Usage, msg, off) if err != nil { return off, err } off, err = packUint8(rr.Selector, msg, off) if err != nil { return off, err } off, err = packUint8(rr.MatchingType, msg, off) if err != nil { return off, err } off, err = packStringHex(rr.Certificate, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *TSIG) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = PackDomainName(rr.Algorithm, msg, off, compression, false) if err != nil { return off, err } off, err = packUint48(rr.TimeSigned, msg, off) if err != nil { return off, err } off, err = packUint16(rr.Fudge, msg, off) if err != nil { return off, err } off, err = packUint16(rr.MACSize, msg, off) if err != nil { return off, err } off, err = packStringHex(rr.MAC, msg, off) if err != nil { return off, err } off, err = packUint16(rr.OrigId, msg, off) if err != nil { return off, err } off, err = packUint16(rr.Error, msg, off) if err != nil { return off, err } off, err = packUint16(rr.OtherLen, msg, off) if err != nil { return off, err } off, err = packStringHex(rr.OtherData, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *TXT) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packStringTxt(rr.Txt, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *UID) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint32(rr.Uid, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *UINFO) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packString(rr.Uinfo, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *URI) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packUint16(rr.Priority, msg, off) if err != nil { return off, err } off, err = packUint16(rr.Weight, msg, off) if err != nil { return off, err } off, err = packStringOctet(rr.Target, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } func (rr *X25) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) { off, err := rr.Hdr.pack(msg, off, compression, compress) if err != nil { return off, err } headerEnd := off off, err = packString(rr.PSDNAddress, msg, off) if err != nil { return off, err } rr.Header().Rdlength = uint16(off - headerEnd) return off, nil } // unpack*() functions func unpackA(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(A) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.A, off, err = unpackDataA(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackAAAA(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(AAAA) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.AAAA, off, err = unpackDataAAAA(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackAFSDB(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(AFSDB) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Subtype, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Hostname, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackANY(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(ANY) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart return rr, off, err } func unpackAVC(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(AVC) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Txt, off, err = unpackStringTxt(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackCAA(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(CAA) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Flag, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Tag, off, err = unpackString(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Value, off, err = unpackStringOctet(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackCDNSKEY(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(CDNSKEY) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Flags, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Protocol, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Algorithm, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.PublicKey, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackCDS(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(CDS) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.KeyTag, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Algorithm, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.DigestType, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Digest, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackCERT(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(CERT) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Type, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.KeyTag, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Algorithm, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Certificate, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackCNAME(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(CNAME) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Target, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackCSYNC(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(CSYNC) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Serial, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Flags, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.TypeBitMap, off, err = unpackDataNsec(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackDHCID(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(DHCID) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Digest, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackDLV(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(DLV) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.KeyTag, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Algorithm, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.DigestType, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Digest, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackDNAME(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(DNAME) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Target, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackDNSKEY(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(DNSKEY) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Flags, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Protocol, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Algorithm, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.PublicKey, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackDS(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(DS) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.KeyTag, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Algorithm, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.DigestType, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Digest, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackEID(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(EID) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Endpoint, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackEUI48(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(EUI48) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Address, off, err = unpackUint48(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackEUI64(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(EUI64) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Address, off, err = unpackUint64(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackGID(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(GID) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Gid, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackGPOS(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(GPOS) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Longitude, off, err = unpackString(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Latitude, off, err = unpackString(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Altitude, off, err = unpackString(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackHINFO(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(HINFO) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Cpu, off, err = unpackString(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Os, off, err = unpackString(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackHIP(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(HIP) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.HitLength, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.PublicKeyAlgorithm, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.PublicKeyLength, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Hit, off, err = unpackStringHex(msg, off, off+int(rr.HitLength)) if err != nil { return rr, off, err } rr.PublicKey, off, err = unpackStringBase64(msg, off, off+int(rr.PublicKeyLength)) if err != nil { return rr, off, err } rr.RendezvousServers, off, err = unpackDataDomainNames(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackKEY(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(KEY) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Flags, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Protocol, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Algorithm, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.PublicKey, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackKX(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(KX) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Preference, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Exchanger, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackL32(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(L32) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Preference, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Locator32, off, err = unpackDataA(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackL64(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(L64) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Preference, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Locator64, off, err = unpackUint64(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackLOC(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(LOC) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Version, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Size, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.HorizPre, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.VertPre, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Latitude, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Longitude, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Altitude, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackLP(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(LP) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Preference, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Fqdn, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackMB(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(MB) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Mb, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackMD(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(MD) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Md, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackMF(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(MF) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Mf, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackMG(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(MG) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Mg, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackMINFO(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(MINFO) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Rmail, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Email, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackMR(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(MR) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Mr, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackMX(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(MX) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Preference, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Mx, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackNAPTR(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(NAPTR) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Order, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Preference, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Flags, off, err = unpackString(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Service, off, err = unpackString(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Regexp, off, err = unpackString(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Replacement, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackNID(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(NID) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Preference, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.NodeID, off, err = unpackUint64(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackNIMLOC(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(NIMLOC) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Locator, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackNINFO(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(NINFO) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.ZSData, off, err = unpackStringTxt(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackNS(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(NS) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Ns, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackNSAPPTR(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(NSAPPTR) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Ptr, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackNSEC(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(NSEC) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.NextDomain, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.TypeBitMap, off, err = unpackDataNsec(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackNSEC3(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(NSEC3) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Hash, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Flags, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Iterations, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.SaltLength, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Salt, off, err = unpackStringHex(msg, off, off+int(rr.SaltLength)) if err != nil { return rr, off, err } rr.HashLength, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.NextDomain, off, err = unpackStringBase32(msg, off, off+int(rr.HashLength)) if err != nil { return rr, off, err } rr.TypeBitMap, off, err = unpackDataNsec(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackNSEC3PARAM(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(NSEC3PARAM) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Hash, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Flags, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Iterations, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.SaltLength, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Salt, off, err = unpackStringHex(msg, off, off+int(rr.SaltLength)) if err != nil { return rr, off, err } return rr, off, err } func unpackOPENPGPKEY(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(OPENPGPKEY) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.PublicKey, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackOPT(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(OPT) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Option, off, err = unpackDataOpt(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackPTR(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(PTR) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Ptr, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackPX(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(PX) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Preference, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Map822, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Mapx400, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackRFC3597(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(RFC3597) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Rdata, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackRKEY(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(RKEY) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Flags, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Protocol, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Algorithm, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.PublicKey, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackRP(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(RP) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Mbox, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Txt, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackRRSIG(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(RRSIG) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.TypeCovered, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Algorithm, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Labels, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.OrigTtl, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Expiration, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Inception, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.KeyTag, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.SignerName, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Signature, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackRT(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(RT) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Preference, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Host, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackSIG(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(SIG) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.TypeCovered, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Algorithm, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Labels, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.OrigTtl, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Expiration, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Inception, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.KeyTag, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.SignerName, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Signature, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackSMIMEA(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(SMIMEA) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Usage, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Selector, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.MatchingType, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Certificate, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackSOA(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(SOA) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Ns, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Mbox, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Serial, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Refresh, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Retry, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Expire, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Minttl, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackSPF(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(SPF) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Txt, off, err = unpackStringTxt(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackSRV(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(SRV) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Priority, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Weight, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Port, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Target, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackSSHFP(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(SSHFP) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Algorithm, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Type, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.FingerPrint, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackTA(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(TA) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.KeyTag, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Algorithm, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.DigestType, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Digest, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackTALINK(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(TALINK) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.PreviousName, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.NextName, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackTKEY(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(TKEY) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Algorithm, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Inception, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Expiration, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Mode, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Error, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.KeySize, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Key, off, err = unpackStringHex(msg, off, off+int(rr.KeySize)) if err != nil { return rr, off, err } rr.OtherLen, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.OtherData, off, err = unpackStringHex(msg, off, off+int(rr.OtherLen)) if err != nil { return rr, off, err } return rr, off, err } func unpackTLSA(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(TLSA) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Usage, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Selector, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.MatchingType, off, err = unpackUint8(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Certificate, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength)) if err != nil { return rr, off, err } return rr, off, err } func unpackTSIG(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(TSIG) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Algorithm, off, err = UnpackDomainName(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.TimeSigned, off, err = unpackUint48(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Fudge, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.MACSize, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.MAC, off, err = unpackStringHex(msg, off, off+int(rr.MACSize)) if err != nil { return rr, off, err } rr.OrigId, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Error, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.OtherLen, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.OtherData, off, err = unpackStringHex(msg, off, off+int(rr.OtherLen)) if err != nil { return rr, off, err } return rr, off, err } func unpackTXT(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(TXT) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Txt, off, err = unpackStringTxt(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackUID(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(UID) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Uid, off, err = unpackUint32(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackUINFO(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(UINFO) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Uinfo, off, err = unpackString(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackURI(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(URI) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.Priority, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Weight, off, err = unpackUint16(msg, off) if err != nil { return rr, off, err } if off == len(msg) { return rr, off, nil } rr.Target, off, err = unpackStringOctet(msg, off) if err != nil { return rr, off, err } return rr, off, err } func unpackX25(h RR_Header, msg []byte, off int) (RR, int, error) { rr := new(X25) rr.Hdr = h if noRdata(h) { return rr, off, nil } var err error rdStart := off _ = rdStart rr.PSDNAddress, off, err = unpackString(msg, off) if err != nil { return rr, off, err } return rr, off, err } var typeToUnpack = map[uint16]func(RR_Header, []byte, int) (RR, int, error){ TypeA: unpackA, TypeAAAA: unpackAAAA, TypeAFSDB: unpackAFSDB, TypeANY: unpackANY, TypeAVC: unpackAVC, TypeCAA: unpackCAA, TypeCDNSKEY: unpackCDNSKEY, TypeCDS: unpackCDS, TypeCERT: unpackCERT, TypeCNAME: unpackCNAME, TypeCSYNC: unpackCSYNC, TypeDHCID: unpackDHCID, TypeDLV: unpackDLV, TypeDNAME: unpackDNAME, TypeDNSKEY: unpackDNSKEY, TypeDS: unpackDS, TypeEID: unpackEID, TypeEUI48: unpackEUI48, TypeEUI64: unpackEUI64, TypeGID: unpackGID, TypeGPOS: unpackGPOS, TypeHINFO: unpackHINFO, TypeHIP: unpackHIP, TypeKEY: unpackKEY, TypeKX: unpackKX, TypeL32: unpackL32, TypeL64: unpackL64, TypeLOC: unpackLOC, TypeLP: unpackLP, TypeMB: unpackMB, TypeMD: unpackMD, TypeMF: unpackMF, TypeMG: unpackMG, TypeMINFO: unpackMINFO, TypeMR: unpackMR, TypeMX: unpackMX, TypeNAPTR: unpackNAPTR, TypeNID: unpackNID, TypeNIMLOC: unpackNIMLOC, TypeNINFO: unpackNINFO, TypeNS: unpackNS, TypeNSAPPTR: unpackNSAPPTR, TypeNSEC: unpackNSEC, TypeNSEC3: unpackNSEC3, TypeNSEC3PARAM: unpackNSEC3PARAM, TypeOPENPGPKEY: unpackOPENPGPKEY, TypeOPT: unpackOPT, TypePTR: unpackPTR, TypePX: unpackPX, TypeRKEY: unpackRKEY, TypeRP: unpackRP, TypeRRSIG: unpackRRSIG, TypeRT: unpackRT, TypeSIG: unpackSIG, TypeSMIMEA: unpackSMIMEA, TypeSOA: unpackSOA, TypeSPF: unpackSPF, TypeSRV: unpackSRV, TypeSSHFP: unpackSSHFP, TypeTA: unpackTA, TypeTALINK: unpackTALINK, TypeTKEY: unpackTKEY, TypeTLSA: unpackTLSA, TypeTSIG: unpackTSIG, TypeTXT: unpackTXT, TypeUID: unpackUID, TypeUINFO: unpackUINFO, TypeURI: unpackURI, TypeX25: unpackX25, } golang-github-miekg-dns-1.0.4+ds/ztypes.go000066400000000000000000000574001325625637500204320ustar00rootroot00000000000000// Code generated by "go run types_generate.go"; DO NOT EDIT. package dns import ( "encoding/base64" "net" ) // TypeToRR is a map of constructors for each RR type. var TypeToRR = map[uint16]func() RR{ TypeA: func() RR { return new(A) }, TypeAAAA: func() RR { return new(AAAA) }, TypeAFSDB: func() RR { return new(AFSDB) }, TypeANY: func() RR { return new(ANY) }, TypeAVC: func() RR { return new(AVC) }, TypeCAA: func() RR { return new(CAA) }, TypeCDNSKEY: func() RR { return new(CDNSKEY) }, TypeCDS: func() RR { return new(CDS) }, TypeCERT: func() RR { return new(CERT) }, TypeCNAME: func() RR { return new(CNAME) }, TypeCSYNC: func() RR { return new(CSYNC) }, TypeDHCID: func() RR { return new(DHCID) }, TypeDLV: func() RR { return new(DLV) }, TypeDNAME: func() RR { return new(DNAME) }, TypeDNSKEY: func() RR { return new(DNSKEY) }, TypeDS: func() RR { return new(DS) }, TypeEID: func() RR { return new(EID) }, TypeEUI48: func() RR { return new(EUI48) }, TypeEUI64: func() RR { return new(EUI64) }, TypeGID: func() RR { return new(GID) }, TypeGPOS: func() RR { return new(GPOS) }, TypeHINFO: func() RR { return new(HINFO) }, TypeHIP: func() RR { return new(HIP) }, TypeKEY: func() RR { return new(KEY) }, TypeKX: func() RR { return new(KX) }, TypeL32: func() RR { return new(L32) }, TypeL64: func() RR { return new(L64) }, TypeLOC: func() RR { return new(LOC) }, TypeLP: func() RR { return new(LP) }, TypeMB: func() RR { return new(MB) }, TypeMD: func() RR { return new(MD) }, TypeMF: func() RR { return new(MF) }, TypeMG: func() RR { return new(MG) }, TypeMINFO: func() RR { return new(MINFO) }, TypeMR: func() RR { return new(MR) }, TypeMX: func() RR { return new(MX) }, TypeNAPTR: func() RR { return new(NAPTR) }, TypeNID: func() RR { return new(NID) }, TypeNIMLOC: func() RR { return new(NIMLOC) }, TypeNINFO: func() RR { return new(NINFO) }, TypeNS: func() RR { return new(NS) }, TypeNSAPPTR: func() RR { return new(NSAPPTR) }, TypeNSEC: func() RR { return new(NSEC) }, TypeNSEC3: func() RR { return new(NSEC3) }, TypeNSEC3PARAM: func() RR { return new(NSEC3PARAM) }, TypeOPENPGPKEY: func() RR { return new(OPENPGPKEY) }, TypeOPT: func() RR { return new(OPT) }, TypePTR: func() RR { return new(PTR) }, TypePX: func() RR { return new(PX) }, TypeRKEY: func() RR { return new(RKEY) }, TypeRP: func() RR { return new(RP) }, TypeRRSIG: func() RR { return new(RRSIG) }, TypeRT: func() RR { return new(RT) }, TypeSIG: func() RR { return new(SIG) }, TypeSMIMEA: func() RR { return new(SMIMEA) }, TypeSOA: func() RR { return new(SOA) }, TypeSPF: func() RR { return new(SPF) }, TypeSRV: func() RR { return new(SRV) }, TypeSSHFP: func() RR { return new(SSHFP) }, TypeTA: func() RR { return new(TA) }, TypeTALINK: func() RR { return new(TALINK) }, TypeTKEY: func() RR { return new(TKEY) }, TypeTLSA: func() RR { return new(TLSA) }, TypeTSIG: func() RR { return new(TSIG) }, TypeTXT: func() RR { return new(TXT) }, TypeUID: func() RR { return new(UID) }, TypeUINFO: func() RR { return new(UINFO) }, TypeURI: func() RR { return new(URI) }, TypeX25: func() RR { return new(X25) }, } // TypeToString is a map of strings for each RR type. var TypeToString = map[uint16]string{ TypeA: "A", TypeAAAA: "AAAA", TypeAFSDB: "AFSDB", TypeANY: "ANY", TypeATMA: "ATMA", TypeAVC: "AVC", TypeAXFR: "AXFR", TypeCAA: "CAA", TypeCDNSKEY: "CDNSKEY", TypeCDS: "CDS", TypeCERT: "CERT", TypeCNAME: "CNAME", TypeCSYNC: "CSYNC", TypeDHCID: "DHCID", TypeDLV: "DLV", TypeDNAME: "DNAME", TypeDNSKEY: "DNSKEY", TypeDS: "DS", TypeEID: "EID", TypeEUI48: "EUI48", TypeEUI64: "EUI64", TypeGID: "GID", TypeGPOS: "GPOS", TypeHINFO: "HINFO", TypeHIP: "HIP", TypeISDN: "ISDN", TypeIXFR: "IXFR", TypeKEY: "KEY", TypeKX: "KX", TypeL32: "L32", TypeL64: "L64", TypeLOC: "LOC", TypeLP: "LP", TypeMAILA: "MAILA", TypeMAILB: "MAILB", TypeMB: "MB", TypeMD: "MD", TypeMF: "MF", TypeMG: "MG", TypeMINFO: "MINFO", TypeMR: "MR", TypeMX: "MX", TypeNAPTR: "NAPTR", TypeNID: "NID", TypeNIMLOC: "NIMLOC", TypeNINFO: "NINFO", TypeNS: "NS", TypeNSEC: "NSEC", TypeNSEC3: "NSEC3", TypeNSEC3PARAM: "NSEC3PARAM", TypeNULL: "NULL", TypeNXT: "NXT", TypeNone: "None", TypeOPENPGPKEY: "OPENPGPKEY", TypeOPT: "OPT", TypePTR: "PTR", TypePX: "PX", TypeRKEY: "RKEY", TypeRP: "RP", TypeRRSIG: "RRSIG", TypeRT: "RT", TypeReserved: "Reserved", TypeSIG: "SIG", TypeSMIMEA: "SMIMEA", TypeSOA: "SOA", TypeSPF: "SPF", TypeSRV: "SRV", TypeSSHFP: "SSHFP", TypeTA: "TA", TypeTALINK: "TALINK", TypeTKEY: "TKEY", TypeTLSA: "TLSA", TypeTSIG: "TSIG", TypeTXT: "TXT", TypeUID: "UID", TypeUINFO: "UINFO", TypeUNSPEC: "UNSPEC", TypeURI: "URI", TypeX25: "X25", TypeNSAPPTR: "NSAP-PTR", } func (rr *A) Header() *RR_Header { return &rr.Hdr } func (rr *AAAA) Header() *RR_Header { return &rr.Hdr } func (rr *AFSDB) Header() *RR_Header { return &rr.Hdr } func (rr *ANY) Header() *RR_Header { return &rr.Hdr } func (rr *AVC) Header() *RR_Header { return &rr.Hdr } func (rr *CAA) Header() *RR_Header { return &rr.Hdr } func (rr *CDNSKEY) Header() *RR_Header { return &rr.Hdr } func (rr *CDS) Header() *RR_Header { return &rr.Hdr } func (rr *CERT) Header() *RR_Header { return &rr.Hdr } func (rr *CNAME) Header() *RR_Header { return &rr.Hdr } func (rr *CSYNC) Header() *RR_Header { return &rr.Hdr } func (rr *DHCID) Header() *RR_Header { return &rr.Hdr } func (rr *DLV) Header() *RR_Header { return &rr.Hdr } func (rr *DNAME) Header() *RR_Header { return &rr.Hdr } func (rr *DNSKEY) Header() *RR_Header { return &rr.Hdr } func (rr *DS) Header() *RR_Header { return &rr.Hdr } func (rr *EID) Header() *RR_Header { return &rr.Hdr } func (rr *EUI48) Header() *RR_Header { return &rr.Hdr } func (rr *EUI64) Header() *RR_Header { return &rr.Hdr } func (rr *GID) Header() *RR_Header { return &rr.Hdr } func (rr *GPOS) Header() *RR_Header { return &rr.Hdr } func (rr *HINFO) Header() *RR_Header { return &rr.Hdr } func (rr *HIP) Header() *RR_Header { return &rr.Hdr } func (rr *KEY) Header() *RR_Header { return &rr.Hdr } func (rr *KX) Header() *RR_Header { return &rr.Hdr } func (rr *L32) Header() *RR_Header { return &rr.Hdr } func (rr *L64) Header() *RR_Header { return &rr.Hdr } func (rr *LOC) Header() *RR_Header { return &rr.Hdr } func (rr *LP) Header() *RR_Header { return &rr.Hdr } func (rr *MB) Header() *RR_Header { return &rr.Hdr } func (rr *MD) Header() *RR_Header { return &rr.Hdr } func (rr *MF) Header() *RR_Header { return &rr.Hdr } func (rr *MG) Header() *RR_Header { return &rr.Hdr } func (rr *MINFO) Header() *RR_Header { return &rr.Hdr } func (rr *MR) Header() *RR_Header { return &rr.Hdr } func (rr *MX) Header() *RR_Header { return &rr.Hdr } func (rr *NAPTR) Header() *RR_Header { return &rr.Hdr } func (rr *NID) Header() *RR_Header { return &rr.Hdr } func (rr *NIMLOC) Header() *RR_Header { return &rr.Hdr } func (rr *NINFO) Header() *RR_Header { return &rr.Hdr } func (rr *NS) Header() *RR_Header { return &rr.Hdr } func (rr *NSAPPTR) Header() *RR_Header { return &rr.Hdr } func (rr *NSEC) Header() *RR_Header { return &rr.Hdr } func (rr *NSEC3) Header() *RR_Header { return &rr.Hdr } func (rr *NSEC3PARAM) Header() *RR_Header { return &rr.Hdr } func (rr *OPENPGPKEY) Header() *RR_Header { return &rr.Hdr } func (rr *OPT) Header() *RR_Header { return &rr.Hdr } func (rr *PTR) Header() *RR_Header { return &rr.Hdr } func (rr *PX) Header() *RR_Header { return &rr.Hdr } func (rr *RFC3597) Header() *RR_Header { return &rr.Hdr } func (rr *RKEY) Header() *RR_Header { return &rr.Hdr } func (rr *RP) Header() *RR_Header { return &rr.Hdr } func (rr *RRSIG) Header() *RR_Header { return &rr.Hdr } func (rr *RT) Header() *RR_Header { return &rr.Hdr } func (rr *SIG) Header() *RR_Header { return &rr.Hdr } func (rr *SMIMEA) Header() *RR_Header { return &rr.Hdr } func (rr *SOA) Header() *RR_Header { return &rr.Hdr } func (rr *SPF) Header() *RR_Header { return &rr.Hdr } func (rr *SRV) Header() *RR_Header { return &rr.Hdr } func (rr *SSHFP) Header() *RR_Header { return &rr.Hdr } func (rr *TA) Header() *RR_Header { return &rr.Hdr } func (rr *TALINK) Header() *RR_Header { return &rr.Hdr } func (rr *TKEY) Header() *RR_Header { return &rr.Hdr } func (rr *TLSA) Header() *RR_Header { return &rr.Hdr } func (rr *TSIG) Header() *RR_Header { return &rr.Hdr } func (rr *TXT) Header() *RR_Header { return &rr.Hdr } func (rr *UID) Header() *RR_Header { return &rr.Hdr } func (rr *UINFO) Header() *RR_Header { return &rr.Hdr } func (rr *URI) Header() *RR_Header { return &rr.Hdr } func (rr *X25) Header() *RR_Header { return &rr.Hdr } // len() functions func (rr *A) len() int { l := rr.Hdr.len() l += net.IPv4len // A return l } func (rr *AAAA) len() int { l := rr.Hdr.len() l += net.IPv6len // AAAA return l } func (rr *AFSDB) len() int { l := rr.Hdr.len() l += 2 // Subtype l += len(rr.Hostname) + 1 return l } func (rr *ANY) len() int { l := rr.Hdr.len() return l } func (rr *AVC) len() int { l := rr.Hdr.len() for _, x := range rr.Txt { l += len(x) + 1 } return l } func (rr *CAA) len() int { l := rr.Hdr.len() l++ // Flag l += len(rr.Tag) + 1 l += len(rr.Value) return l } func (rr *CERT) len() int { l := rr.Hdr.len() l += 2 // Type l += 2 // KeyTag l++ // Algorithm l += base64.StdEncoding.DecodedLen(len(rr.Certificate)) return l } func (rr *CNAME) len() int { l := rr.Hdr.len() l += len(rr.Target) + 1 return l } func (rr *DHCID) len() int { l := rr.Hdr.len() l += base64.StdEncoding.DecodedLen(len(rr.Digest)) return l } func (rr *DNAME) len() int { l := rr.Hdr.len() l += len(rr.Target) + 1 return l } func (rr *DNSKEY) len() int { l := rr.Hdr.len() l += 2 // Flags l++ // Protocol l++ // Algorithm l += base64.StdEncoding.DecodedLen(len(rr.PublicKey)) return l } func (rr *DS) len() int { l := rr.Hdr.len() l += 2 // KeyTag l++ // Algorithm l++ // DigestType l += len(rr.Digest)/2 + 1 return l } func (rr *EID) len() int { l := rr.Hdr.len() l += len(rr.Endpoint)/2 + 1 return l } func (rr *EUI48) len() int { l := rr.Hdr.len() l += 6 // Address return l } func (rr *EUI64) len() int { l := rr.Hdr.len() l += 8 // Address return l } func (rr *GID) len() int { l := rr.Hdr.len() l += 4 // Gid return l } func (rr *GPOS) len() int { l := rr.Hdr.len() l += len(rr.Longitude) + 1 l += len(rr.Latitude) + 1 l += len(rr.Altitude) + 1 return l } func (rr *HINFO) len() int { l := rr.Hdr.len() l += len(rr.Cpu) + 1 l += len(rr.Os) + 1 return l } func (rr *HIP) len() int { l := rr.Hdr.len() l++ // HitLength l++ // PublicKeyAlgorithm l += 2 // PublicKeyLength l += len(rr.Hit) / 2 l += base64.StdEncoding.DecodedLen(len(rr.PublicKey)) for _, x := range rr.RendezvousServers { l += len(x) + 1 } return l } func (rr *KX) len() int { l := rr.Hdr.len() l += 2 // Preference l += len(rr.Exchanger) + 1 return l } func (rr *L32) len() int { l := rr.Hdr.len() l += 2 // Preference l += net.IPv4len // Locator32 return l } func (rr *L64) len() int { l := rr.Hdr.len() l += 2 // Preference l += 8 // Locator64 return l } func (rr *LOC) len() int { l := rr.Hdr.len() l++ // Version l++ // Size l++ // HorizPre l++ // VertPre l += 4 // Latitude l += 4 // Longitude l += 4 // Altitude return l } func (rr *LP) len() int { l := rr.Hdr.len() l += 2 // Preference l += len(rr.Fqdn) + 1 return l } func (rr *MB) len() int { l := rr.Hdr.len() l += len(rr.Mb) + 1 return l } func (rr *MD) len() int { l := rr.Hdr.len() l += len(rr.Md) + 1 return l } func (rr *MF) len() int { l := rr.Hdr.len() l += len(rr.Mf) + 1 return l } func (rr *MG) len() int { l := rr.Hdr.len() l += len(rr.Mg) + 1 return l } func (rr *MINFO) len() int { l := rr.Hdr.len() l += len(rr.Rmail) + 1 l += len(rr.Email) + 1 return l } func (rr *MR) len() int { l := rr.Hdr.len() l += len(rr.Mr) + 1 return l } func (rr *MX) len() int { l := rr.Hdr.len() l += 2 // Preference l += len(rr.Mx) + 1 return l } func (rr *NAPTR) len() int { l := rr.Hdr.len() l += 2 // Order l += 2 // Preference l += len(rr.Flags) + 1 l += len(rr.Service) + 1 l += len(rr.Regexp) + 1 l += len(rr.Replacement) + 1 return l } func (rr *NID) len() int { l := rr.Hdr.len() l += 2 // Preference l += 8 // NodeID return l } func (rr *NIMLOC) len() int { l := rr.Hdr.len() l += len(rr.Locator)/2 + 1 return l } func (rr *NINFO) len() int { l := rr.Hdr.len() for _, x := range rr.ZSData { l += len(x) + 1 } return l } func (rr *NS) len() int { l := rr.Hdr.len() l += len(rr.Ns) + 1 return l } func (rr *NSAPPTR) len() int { l := rr.Hdr.len() l += len(rr.Ptr) + 1 return l } func (rr *NSEC3PARAM) len() int { l := rr.Hdr.len() l++ // Hash l++ // Flags l += 2 // Iterations l++ // SaltLength l += len(rr.Salt) / 2 return l } func (rr *OPENPGPKEY) len() int { l := rr.Hdr.len() l += base64.StdEncoding.DecodedLen(len(rr.PublicKey)) return l } func (rr *PTR) len() int { l := rr.Hdr.len() l += len(rr.Ptr) + 1 return l } func (rr *PX) len() int { l := rr.Hdr.len() l += 2 // Preference l += len(rr.Map822) + 1 l += len(rr.Mapx400) + 1 return l } func (rr *RFC3597) len() int { l := rr.Hdr.len() l += len(rr.Rdata)/2 + 1 return l } func (rr *RKEY) len() int { l := rr.Hdr.len() l += 2 // Flags l++ // Protocol l++ // Algorithm l += base64.StdEncoding.DecodedLen(len(rr.PublicKey)) return l } func (rr *RP) len() int { l := rr.Hdr.len() l += len(rr.Mbox) + 1 l += len(rr.Txt) + 1 return l } func (rr *RRSIG) len() int { l := rr.Hdr.len() l += 2 // TypeCovered l++ // Algorithm l++ // Labels l += 4 // OrigTtl l += 4 // Expiration l += 4 // Inception l += 2 // KeyTag l += len(rr.SignerName) + 1 l += base64.StdEncoding.DecodedLen(len(rr.Signature)) return l } func (rr *RT) len() int { l := rr.Hdr.len() l += 2 // Preference l += len(rr.Host) + 1 return l } func (rr *SMIMEA) len() int { l := rr.Hdr.len() l++ // Usage l++ // Selector l++ // MatchingType l += len(rr.Certificate)/2 + 1 return l } func (rr *SOA) len() int { l := rr.Hdr.len() l += len(rr.Ns) + 1 l += len(rr.Mbox) + 1 l += 4 // Serial l += 4 // Refresh l += 4 // Retry l += 4 // Expire l += 4 // Minttl return l } func (rr *SPF) len() int { l := rr.Hdr.len() for _, x := range rr.Txt { l += len(x) + 1 } return l } func (rr *SRV) len() int { l := rr.Hdr.len() l += 2 // Priority l += 2 // Weight l += 2 // Port l += len(rr.Target) + 1 return l } func (rr *SSHFP) len() int { l := rr.Hdr.len() l++ // Algorithm l++ // Type l += len(rr.FingerPrint)/2 + 1 return l } func (rr *TA) len() int { l := rr.Hdr.len() l += 2 // KeyTag l++ // Algorithm l++ // DigestType l += len(rr.Digest)/2 + 1 return l } func (rr *TALINK) len() int { l := rr.Hdr.len() l += len(rr.PreviousName) + 1 l += len(rr.NextName) + 1 return l } func (rr *TKEY) len() int { l := rr.Hdr.len() l += len(rr.Algorithm) + 1 l += 4 // Inception l += 4 // Expiration l += 2 // Mode l += 2 // Error l += 2 // KeySize l += len(rr.Key) / 2 l += 2 // OtherLen l += len(rr.OtherData) / 2 return l } func (rr *TLSA) len() int { l := rr.Hdr.len() l++ // Usage l++ // Selector l++ // MatchingType l += len(rr.Certificate)/2 + 1 return l } func (rr *TSIG) len() int { l := rr.Hdr.len() l += len(rr.Algorithm) + 1 l += 6 // TimeSigned l += 2 // Fudge l += 2 // MACSize l += len(rr.MAC) / 2 l += 2 // OrigId l += 2 // Error l += 2 // OtherLen l += len(rr.OtherData) / 2 return l } func (rr *TXT) len() int { l := rr.Hdr.len() for _, x := range rr.Txt { l += len(x) + 1 } return l } func (rr *UID) len() int { l := rr.Hdr.len() l += 4 // Uid return l } func (rr *UINFO) len() int { l := rr.Hdr.len() l += len(rr.Uinfo) + 1 return l } func (rr *URI) len() int { l := rr.Hdr.len() l += 2 // Priority l += 2 // Weight l += len(rr.Target) return l } func (rr *X25) len() int { l := rr.Hdr.len() l += len(rr.PSDNAddress) + 1 return l } // copy() functions func (rr *A) copy() RR { return &A{*rr.Hdr.copyHeader(), copyIP(rr.A)} } func (rr *AAAA) copy() RR { return &AAAA{*rr.Hdr.copyHeader(), copyIP(rr.AAAA)} } func (rr *AFSDB) copy() RR { return &AFSDB{*rr.Hdr.copyHeader(), rr.Subtype, rr.Hostname} } func (rr *ANY) copy() RR { return &ANY{*rr.Hdr.copyHeader()} } func (rr *AVC) copy() RR { Txt := make([]string, len(rr.Txt)) copy(Txt, rr.Txt) return &AVC{*rr.Hdr.copyHeader(), Txt} } func (rr *CAA) copy() RR { return &CAA{*rr.Hdr.copyHeader(), rr.Flag, rr.Tag, rr.Value} } func (rr *CERT) copy() RR { return &CERT{*rr.Hdr.copyHeader(), rr.Type, rr.KeyTag, rr.Algorithm, rr.Certificate} } func (rr *CNAME) copy() RR { return &CNAME{*rr.Hdr.copyHeader(), rr.Target} } func (rr *CSYNC) copy() RR { TypeBitMap := make([]uint16, len(rr.TypeBitMap)) copy(TypeBitMap, rr.TypeBitMap) return &CSYNC{*rr.Hdr.copyHeader(), rr.Serial, rr.Flags, TypeBitMap} } func (rr *DHCID) copy() RR { return &DHCID{*rr.Hdr.copyHeader(), rr.Digest} } func (rr *DNAME) copy() RR { return &DNAME{*rr.Hdr.copyHeader(), rr.Target} } func (rr *DNSKEY) copy() RR { return &DNSKEY{*rr.Hdr.copyHeader(), rr.Flags, rr.Protocol, rr.Algorithm, rr.PublicKey} } func (rr *DS) copy() RR { return &DS{*rr.Hdr.copyHeader(), rr.KeyTag, rr.Algorithm, rr.DigestType, rr.Digest} } func (rr *EID) copy() RR { return &EID{*rr.Hdr.copyHeader(), rr.Endpoint} } func (rr *EUI48) copy() RR { return &EUI48{*rr.Hdr.copyHeader(), rr.Address} } func (rr *EUI64) copy() RR { return &EUI64{*rr.Hdr.copyHeader(), rr.Address} } func (rr *GID) copy() RR { return &GID{*rr.Hdr.copyHeader(), rr.Gid} } func (rr *GPOS) copy() RR { return &GPOS{*rr.Hdr.copyHeader(), rr.Longitude, rr.Latitude, rr.Altitude} } func (rr *HINFO) copy() RR { return &HINFO{*rr.Hdr.copyHeader(), rr.Cpu, rr.Os} } func (rr *HIP) copy() RR { RendezvousServers := make([]string, len(rr.RendezvousServers)) copy(RendezvousServers, rr.RendezvousServers) return &HIP{*rr.Hdr.copyHeader(), rr.HitLength, rr.PublicKeyAlgorithm, rr.PublicKeyLength, rr.Hit, rr.PublicKey, RendezvousServers} } func (rr *KX) copy() RR { return &KX{*rr.Hdr.copyHeader(), rr.Preference, rr.Exchanger} } func (rr *L32) copy() RR { return &L32{*rr.Hdr.copyHeader(), rr.Preference, copyIP(rr.Locator32)} } func (rr *L64) copy() RR { return &L64{*rr.Hdr.copyHeader(), rr.Preference, rr.Locator64} } func (rr *LOC) copy() RR { return &LOC{*rr.Hdr.copyHeader(), rr.Version, rr.Size, rr.HorizPre, rr.VertPre, rr.Latitude, rr.Longitude, rr.Altitude} } func (rr *LP) copy() RR { return &LP{*rr.Hdr.copyHeader(), rr.Preference, rr.Fqdn} } func (rr *MB) copy() RR { return &MB{*rr.Hdr.copyHeader(), rr.Mb} } func (rr *MD) copy() RR { return &MD{*rr.Hdr.copyHeader(), rr.Md} } func (rr *MF) copy() RR { return &MF{*rr.Hdr.copyHeader(), rr.Mf} } func (rr *MG) copy() RR { return &MG{*rr.Hdr.copyHeader(), rr.Mg} } func (rr *MINFO) copy() RR { return &MINFO{*rr.Hdr.copyHeader(), rr.Rmail, rr.Email} } func (rr *MR) copy() RR { return &MR{*rr.Hdr.copyHeader(), rr.Mr} } func (rr *MX) copy() RR { return &MX{*rr.Hdr.copyHeader(), rr.Preference, rr.Mx} } func (rr *NAPTR) copy() RR { return &NAPTR{*rr.Hdr.copyHeader(), rr.Order, rr.Preference, rr.Flags, rr.Service, rr.Regexp, rr.Replacement} } func (rr *NID) copy() RR { return &NID{*rr.Hdr.copyHeader(), rr.Preference, rr.NodeID} } func (rr *NIMLOC) copy() RR { return &NIMLOC{*rr.Hdr.copyHeader(), rr.Locator} } func (rr *NINFO) copy() RR { ZSData := make([]string, len(rr.ZSData)) copy(ZSData, rr.ZSData) return &NINFO{*rr.Hdr.copyHeader(), ZSData} } func (rr *NS) copy() RR { return &NS{*rr.Hdr.copyHeader(), rr.Ns} } func (rr *NSAPPTR) copy() RR { return &NSAPPTR{*rr.Hdr.copyHeader(), rr.Ptr} } func (rr *NSEC) copy() RR { TypeBitMap := make([]uint16, len(rr.TypeBitMap)) copy(TypeBitMap, rr.TypeBitMap) return &NSEC{*rr.Hdr.copyHeader(), rr.NextDomain, TypeBitMap} } func (rr *NSEC3) copy() RR { TypeBitMap := make([]uint16, len(rr.TypeBitMap)) copy(TypeBitMap, rr.TypeBitMap) return &NSEC3{*rr.Hdr.copyHeader(), rr.Hash, rr.Flags, rr.Iterations, rr.SaltLength, rr.Salt, rr.HashLength, rr.NextDomain, TypeBitMap} } func (rr *NSEC3PARAM) copy() RR { return &NSEC3PARAM{*rr.Hdr.copyHeader(), rr.Hash, rr.Flags, rr.Iterations, rr.SaltLength, rr.Salt} } func (rr *OPENPGPKEY) copy() RR { return &OPENPGPKEY{*rr.Hdr.copyHeader(), rr.PublicKey} } func (rr *OPT) copy() RR { Option := make([]EDNS0, len(rr.Option)) copy(Option, rr.Option) return &OPT{*rr.Hdr.copyHeader(), Option} } func (rr *PTR) copy() RR { return &PTR{*rr.Hdr.copyHeader(), rr.Ptr} } func (rr *PX) copy() RR { return &PX{*rr.Hdr.copyHeader(), rr.Preference, rr.Map822, rr.Mapx400} } func (rr *RFC3597) copy() RR { return &RFC3597{*rr.Hdr.copyHeader(), rr.Rdata} } func (rr *RKEY) copy() RR { return &RKEY{*rr.Hdr.copyHeader(), rr.Flags, rr.Protocol, rr.Algorithm, rr.PublicKey} } func (rr *RP) copy() RR { return &RP{*rr.Hdr.copyHeader(), rr.Mbox, rr.Txt} } func (rr *RRSIG) copy() RR { return &RRSIG{*rr.Hdr.copyHeader(), rr.TypeCovered, rr.Algorithm, rr.Labels, rr.OrigTtl, rr.Expiration, rr.Inception, rr.KeyTag, rr.SignerName, rr.Signature} } func (rr *RT) copy() RR { return &RT{*rr.Hdr.copyHeader(), rr.Preference, rr.Host} } func (rr *SMIMEA) copy() RR { return &SMIMEA{*rr.Hdr.copyHeader(), rr.Usage, rr.Selector, rr.MatchingType, rr.Certificate} } func (rr *SOA) copy() RR { return &SOA{*rr.Hdr.copyHeader(), rr.Ns, rr.Mbox, rr.Serial, rr.Refresh, rr.Retry, rr.Expire, rr.Minttl} } func (rr *SPF) copy() RR { Txt := make([]string, len(rr.Txt)) copy(Txt, rr.Txt) return &SPF{*rr.Hdr.copyHeader(), Txt} } func (rr *SRV) copy() RR { return &SRV{*rr.Hdr.copyHeader(), rr.Priority, rr.Weight, rr.Port, rr.Target} } func (rr *SSHFP) copy() RR { return &SSHFP{*rr.Hdr.copyHeader(), rr.Algorithm, rr.Type, rr.FingerPrint} } func (rr *TA) copy() RR { return &TA{*rr.Hdr.copyHeader(), rr.KeyTag, rr.Algorithm, rr.DigestType, rr.Digest} } func (rr *TALINK) copy() RR { return &TALINK{*rr.Hdr.copyHeader(), rr.PreviousName, rr.NextName} } func (rr *TKEY) copy() RR { return &TKEY{*rr.Hdr.copyHeader(), rr.Algorithm, rr.Inception, rr.Expiration, rr.Mode, rr.Error, rr.KeySize, rr.Key, rr.OtherLen, rr.OtherData} } func (rr *TLSA) copy() RR { return &TLSA{*rr.Hdr.copyHeader(), rr.Usage, rr.Selector, rr.MatchingType, rr.Certificate} } func (rr *TSIG) copy() RR { return &TSIG{*rr.Hdr.copyHeader(), rr.Algorithm, rr.TimeSigned, rr.Fudge, rr.MACSize, rr.MAC, rr.OrigId, rr.Error, rr.OtherLen, rr.OtherData} } func (rr *TXT) copy() RR { Txt := make([]string, len(rr.Txt)) copy(Txt, rr.Txt) return &TXT{*rr.Hdr.copyHeader(), Txt} } func (rr *UID) copy() RR { return &UID{*rr.Hdr.copyHeader(), rr.Uid} } func (rr *UINFO) copy() RR { return &UINFO{*rr.Hdr.copyHeader(), rr.Uinfo} } func (rr *URI) copy() RR { return &URI{*rr.Hdr.copyHeader(), rr.Priority, rr.Weight, rr.Target} } func (rr *X25) copy() RR { return &X25{*rr.Hdr.copyHeader(), rr.PSDNAddress} }