pax_global_header00006660000000000000000000000064125667701640014530gustar00rootroot0000000000000052 comment=f667a5f5f3d4daf264cf2f05d16b539b8bb6ccf7 golang-github-coreos-go-iptables-0.0~git20150805/000077500000000000000000000000001256677016400213415ustar00rootroot00000000000000golang-github-coreos-go-iptables-0.0~git20150805/LICENSE000066400000000000000000000240411256677016400223470ustar00rootroot00000000000000Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. 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See the License for the specific language governing permissions and limitations under the License. golang-github-coreos-go-iptables-0.0~git20150805/README.md000066400000000000000000000011571256677016400226240ustar00rootroot00000000000000# go-iptables [![Build Status](https://travis-ci.org/coreos/go-iptables.png?branch=master)](https://travis-ci.org/coreos/go-iptables) Go bindings for iptables utility. In-kernel netfilter does not have a good userspace API. The tables are manipulated via setsockopt that sets/replaces the entire table. Changes to existing table need to be resolved by userspace code which is difficult and error-prone. Netfilter developers heavily advocate using iptables utlity for programmatic manipulation. go-iptables wraps invokation of iptables utility with functions to append and delete rules; create, clear and delete chains. golang-github-coreos-go-iptables-0.0~git20150805/build000077500000000000000000000006311256677016400223660ustar00rootroot00000000000000#!/bin/bash -e ORG_PATH="github.com/coreos" REPO_PATH="${ORG_PATH}/go-iptables" if [ ! -h gopath/src/${REPO_PATH} ]; then mkdir -p gopath/src/${ORG_PATH} ln -s ../../../.. gopath/src/${REPO_PATH} || exit 255 fi export GOBIN=${PWD}/bin export GOPATH=${PWD}/gopath eval $(go env) if [ ${GOOS} = "linux" ]; then echo "Building go-iptables..." go build ${REPO_PATH}/iptables else echo "Not on Linux" fi golang-github-coreos-go-iptables-0.0~git20150805/build-check000077500000000000000000000011021256677016400234330ustar00rootroot00000000000000#!/bin/bash -e # # Run all go-iptables tests # ./test # ./test -v # # Run tests for one package # PKG=./unit ./test # PKG=ssh ./test # # Invoke ./cover for HTML output COVER=${COVER:-"-cover"} source ./build FORMATTABLE="iptables" # user has not provided PKG override if [ -z "$PKG" ]; then FMT=$FORMATTABLE # user has provided PKG override else # strip out slashes and dots from PKG=./foo/ FMT=${PKG//\//} fi echo "Checking gofmt..." fmtRes=$(gofmt -l $FMT) if [ -n "${fmtRes}" ]; then echo -e "gofmt checking failed:\n${fmtRes}" exit 255 fi echo "Success" golang-github-coreos-go-iptables-0.0~git20150805/iptables/000077500000000000000000000000001256677016400231445ustar00rootroot00000000000000golang-github-coreos-go-iptables-0.0~git20150805/iptables/iptables.go000066400000000000000000000144301256677016400253000ustar00rootroot00000000000000// Copyright 2015 CoreOS, Inc. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package iptables import ( "bytes" "fmt" "log" "os/exec" "regexp" "strconv" "strings" "syscall" ) // Adds the output of stderr to exec.ExitError type Error struct { exec.ExitError msg string } func (e *Error) ExitStatus() int { return e.Sys().(syscall.WaitStatus).ExitStatus() } func (e *Error) Error() string { return fmt.Sprintf("exit status %v: %v", e.ExitStatus(), e.msg) } type IPTables struct { path string } func New() (*IPTables, error) { path, err := exec.LookPath("iptables") if err != nil { return nil, err } return &IPTables{path}, nil } // Exists checks if given rulespec in specified table/chain exists func (ipt *IPTables) Exists(table, chain string, rulespec ...string) (bool, error) { checkPresent, err := getIptablesHasCheckCommand() if err != nil { log.Printf("Error checking iptables version, assuming version at least 1.4.11: %v", err) checkPresent = true } if !checkPresent { cmd := append([]string{"-A", chain}, rulespec...) return existsForOldIpTables(table, strings.Join(cmd, " ")) } else { cmd := append([]string{"-t", table, "-C", chain}, rulespec...) err := ipt.run(cmd...) switch { case err == nil: return true, nil case err.(*Error).ExitStatus() == 1: return false, nil default: return false, err } } } // Insert inserts rulespec to specified table/chain (in specified pos) func (ipt *IPTables) Insert(table, chain string, pos int, rulespec ...string) error { cmd := append([]string{"-t", table, "-I", chain, strconv.Itoa(pos)}, rulespec...) return ipt.run(cmd...) } // Append appends rulespec to specified table/chain func (ipt *IPTables) Append(table, chain string, rulespec ...string) error { cmd := append([]string{"-t", table, "-A", chain}, rulespec...) return ipt.run(cmd...) } // AppendUnique acts like Append except that it won't add a duplicate func (ipt *IPTables) AppendUnique(table, chain string, rulespec ...string) error { exists, err := ipt.Exists(table, chain, rulespec...) if err != nil { return err } if !exists { return ipt.Append(table, chain, rulespec...) } return nil } // Delete removes rulespec in specified table/chain func (ipt *IPTables) Delete(table, chain string, rulespec ...string) error { cmd := append([]string{"-t", table, "-D", chain}, rulespec...) return ipt.run(cmd...) } // List rules in specified table/chain func (ipt *IPTables) List(table, chain string) ([]string, error) { var stdout, stderr bytes.Buffer cmd := exec.Cmd{ Path: ipt.path, Args: []string{ipt.path, "--wait", "-t", table, "-S", chain}, Stdout: &stdout, Stderr: &stderr, } if err := cmd.Run(); err != nil { return nil, &Error{*(err.(*exec.ExitError)), stderr.String()} } rules := strings.Split(stdout.String(), "\n") if len(rules) > 0 && rules[len(rules)-1] == "" { rules = rules[:len(rules)-1] } return rules, nil } func (ipt *IPTables) NewChain(table, chain string) error { return ipt.run("-t", table, "-N", chain) } // ClearChain flushed (deletes all rules) in the specifed table/chain. // If the chain does not exist, new one will be created func (ipt *IPTables) ClearChain(table, chain string) error { err := ipt.NewChain(table, chain) switch { case err == nil: return nil case err.(*Error).ExitStatus() == 1: // chain already exists. Flush (clear) it. return ipt.run("-t", table, "-F", chain) default: return err } } // DeleteChain deletes the chain in the specified table. // The chain must be empty func (ipt *IPTables) DeleteChain(table, chain string) error { return ipt.run("-t", table, "-X", chain) } func (ipt *IPTables) run(args ...string) error { var stderr bytes.Buffer args = append([]string{"--wait"}, args...) cmd := exec.Cmd{ Path: ipt.path, Args: append([]string{ipt.path}, args...), Stderr: &stderr, } if err := cmd.Run(); err != nil { return &Error{*(err.(*exec.ExitError)), stderr.String()} } return nil } // Checks if iptables has the "-C" flag func getIptablesHasCheckCommand() (bool, error) { vstring, err := getIptablesVersionString() if err != nil { return false, err } v1, v2, v3, err := extractIptablesVersion(vstring) if err != nil { return false, err } return iptablesHasCheckCommand(v1, v2, v3), nil } // getIptablesVersion returns the first three components of the iptables version. // e.g. "iptables v1.3.66" would return (1, 3, 66, nil) func extractIptablesVersion(str string) (int, int, int, error) { versionMatcher := regexp.MustCompile("v([0-9]+)\\.([0-9]+)\\.([0-9]+)") result := versionMatcher.FindStringSubmatch(str) if result == nil { return 0, 0, 0, fmt.Errorf("no iptables version found in string: %s", str) } v1, err := strconv.Atoi(result[1]) if err != nil { return 0, 0, 0, err } v2, err := strconv.Atoi(result[2]) if err != nil { return 0, 0, 0, err } v3, err := strconv.Atoi(result[3]) if err != nil { return 0, 0, 0, err } return v1, v2, v3, nil } // Runs "iptables --version" to get the version string func getIptablesVersionString() (string, error) { cmd := exec.Command("iptables", "--version") var out bytes.Buffer cmd.Stdout = &out err := cmd.Run() if err != nil { return "", err } return out.String(), nil } // Checks if an iptables version is after 1.4.11, when --check was added func iptablesHasCheckCommand(v1 int, v2 int, v3 int) bool { if v1 > 1 { return true } if v1 == 1 && v2 > 4 { return true } if v1 == 1 && v2 == 4 && v3 >= 11 { return true } return false } // Checks if a rule specification exists for a table func existsForOldIpTables(table string, ruleSpec string) (bool, error) { cmd := exec.Command("iptables", "-t", table, "-S") var out bytes.Buffer cmd.Stdout = &out err := cmd.Run() if err != nil { return false, err } rules := out.String() return strings.Contains(rules, ruleSpec), nil } golang-github-coreos-go-iptables-0.0~git20150805/iptables/iptables_test.go000066400000000000000000000066751256677016400263530ustar00rootroot00000000000000// Copyright 2015 CoreOS, Inc. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package iptables import ( "crypto/rand" "math/big" "reflect" "testing" ) func randChain(t *testing.T) string { n, err := rand.Int(rand.Reader, big.NewInt(1000000)) if err != nil { t.Fatalf("Failed to generate random chain name: %v", err) } return "TEST-" + n.String() } func TestChain(t *testing.T) { chain := randChain(t) ipt, err := New() if err != nil { t.Fatalf("New failed: %v", err) } // chain shouldn't exist, this will create new err = ipt.ClearChain("filter", chain) if err != nil { t.Fatalf("ClearChain (of missing) failed: %v", err) } // chain now exists err = ipt.ClearChain("filter", chain) if err != nil { t.Fatalf("ClearChain (of empty) failed: %v", err) } // put a simple rule in err = ipt.Append("filter", chain, "-s", "0.0.0.0/0", "-j", "ACCEPT") if err != nil { t.Fatalf("Append failed: %v", err) } // can't delete non-empty chain err = ipt.DeleteChain("filter", chain) if err == nil { t.Fatalf("DeleteChain of non-empty chain did not fail") } err = ipt.ClearChain("filter", chain) if err != nil { t.Fatalf("ClearChain (of non-empty) failed: %v", err) } // chain empty, should be ok err = ipt.DeleteChain("filter", chain) if err != nil { t.Fatalf("DeleteChain of empty chain failed: %v", err) } } func TestRules(t *testing.T) { chain := randChain(t) ipt, err := New() if err != nil { t.Fatalf("New failed: %v", err) } // chain shouldn't exist, this will create new err = ipt.ClearChain("filter", chain) if err != nil { t.Fatalf("ClearChain (of missing) failed: %v", err) } err = ipt.Append("filter", chain, "-s", "10.1.0.0/16", "-d", "8.8.8.8/32", "-j", "ACCEPT") if err != nil { t.Fatalf("Append failed: %v", err) } err = ipt.AppendUnique("filter", chain, "-s", "10.1.0.0/16", "-d", "8.8.8.8/32", "-j", "ACCEPT") if err != nil { t.Fatalf("AppendUnique failed: %v", err) } err = ipt.Append("filter", chain, "-s", "10.2.0.0/16", "-d", "8.8.8.8/32", "-j", "ACCEPT") if err != nil { t.Fatalf("Append failed: %v", err) } err = ipt.Insert("filter", chain, 2, "-s", "10.2.0.0/16", "-d", "9.9.9.9/32", "-j", "ACCEPT") if err != nil { t.Fatalf("Insert failed: %v", err) } err = ipt.Insert("filter", chain, 1, "-s", "10.1.0.0/16", "-d", "9.9.9.9/32", "-j", "ACCEPT") if err != nil { t.Fatalf("Insert failed: %v", err) } err = ipt.Delete("filter", chain, "-s", "10.1.0.0/16", "-d", "9.9.9.9/32", "-j", "ACCEPT") if err != nil { t.Fatalf("Delete failed: %v", err) } rules, err := ipt.List("filter", chain) if err != nil { t.Fatalf("List failed: %v", err) } expected := []string{ "-N " + chain, "-A " + chain + " -s 10.1.0.0/16 -d 8.8.8.8/32 -j ACCEPT", "-A " + chain + " -s 10.2.0.0/16 -d 9.9.9.9/32 -j ACCEPT", "-A " + chain + " -s 10.2.0.0/16 -d 8.8.8.8/32 -j ACCEPT", } if !reflect.DeepEqual(rules, expected) { t.Fatalf("List mismatch: \ngot %#v \nneed %#v", rules, expected) } } golang-github-coreos-go-iptables-0.0~git20150805/test000077500000000000000000000015751256677016400222560ustar00rootroot00000000000000#!/bin/bash -e # # Run all go-iptables tests # ./test # ./test -v # # Run tests for one package # PKG=./unit ./test # PKG=ssh ./test # # Invoke ./cover for HTML output COVER=${COVER:-"-cover"} source ./build TESTABLE="iptables" FORMATTABLE="$TESTABLE" # user has not provided PKG override if [ -z "$PKG" ]; then TEST=$TESTABLE FMT=$FORMATTABLE # user has provided PKG override else # strip out slashes and dots from PKG=./foo/ TEST=${PKG//\//} TEST=${TEST//./} # only run gofmt on packages provided by user FMT="$TEST" fi # split TEST into an array and prepend REPO_PATH to each local package split=(${TEST// / }) TEST=${split[@]/#/${REPO_PATH}/} echo "Running tests..." go test -i ${TEST} go test ${COVER} $@ ${TEST} echo "Checking gofmt..." fmtRes=$(gofmt -l $FMT) if [ -n "${fmtRes}" ]; then echo -e "gofmt checking failed:\n${fmtRes}" exit 255 fi echo "Success"