pax_global_header00006660000000000000000000000064136163546150014524gustar00rootroot0000000000000052 comment=90052734000be120c409677a88cb517e5b49dbf4 dnsutils-2.0.0/000077500000000000000000000000001361635461500133705ustar00rootroot00000000000000dnsutils-2.0.0/.github/000077500000000000000000000000001361635461500147305ustar00rootroot00000000000000dnsutils-2.0.0/.github/workflows/000077500000000000000000000000001361635461500167655ustar00rootroot00000000000000dnsutils-2.0.0/.github/workflows/testing.yml000066400000000000000000000051161361635461500211700ustar00rootroot00000000000000name: v1 on: push: paths-ignore: - 'v[0-9]+/**' pull_request: paths-ignore: - 'v[0-9]+/**' jobs: build: name: Tests runs-on: ubuntu-latest strategy: matrix: go: [ '1.11.x', '1.12.x', '1.13.x' ] env: TEST_KDC_ADDR: 127.0.0.1 TEST_HTTP_URL: http://cname.test.gokrb5 TEST_HTTP_ADDR: 127.0.0.1 DNS_IP: 127.0.88.53 DNSUTILS_OVERRIDE_NS: 127.0.88.53:53 steps: - name: Set up Go ${{ matrix.go }} uses: actions/setup-go@v1 with: go-version: ${{ matrix.go }} - name: Checkout uses: actions/checkout@v2 with: ref: ${{ github.ref }} - name: Test well formatted with gofmt run: | # Remove major version sub directories find . -maxdepth 1 -type d -regex '\./v[0-9]+' | xargs -i rm -rf {} GO_FILES=$(find . -iname '*.go' -type f | grep -v /vendor/) test -z $(gofmt -s -d -l -e $GO_FILES | tee /dev/fd/2 | xargs | sed 's/\s//g') id: gofmt - name: Copy into GOPATH run: | # Default GOPATH=${HOME}/go mkdir -p ${HOME}/go/src/github.com/${GITHUB_REPOSITORY} cp -r $GITHUB_WORKSPACE/* /home/runner/go/src/github.com/${GITHUB_REPOSITORY} id: copyToGOPATH - name: Get dependencies run: | cd ${HOME}/go/src/github.com/${GITHUB_REPOSITORY} go get -v -t -d ./... id: goGet - name: Go vet run: | cd ${HOME}/go/src/github.com/${GITHUB_REPOSITORY} go vet $(go list ./... | grep -E -v '/v[0-9]+' | grep -v /vendor/) id: govet - name: Start integration test dependencies run: | sudo docker run -d -h ns.test.gokrb5 -v /etc/localtime:/etc/localtime:ro -e "TEST_KDC_ADDR=${TEST_KDC_ADDR}" -e "TEST_HTTP_ADDR=${TEST_HTTP_ADDR}" -p ${DNSUTILS_OVERRIDE_NS}:53 -p ${DNSUTILS_OVERRIDE_NS}:53/udp --name dns jcmturner/gokrb5:dns sudo sed -i 's/nameserver .*/nameserver '${DNS_IP}'/g' /etc/resolv.conf dig _kerberos._udp.TEST.GOKRB5 id: intgTestDeps - name: Unit tests run: | cd ${HOME}/go/src/github.com/${GITHUB_REPOSITORY} go test -race $(go list ./... | grep -E -v '/v[0-9]+' | grep -v /vendor/) env: INTEGRATION: 1 id: unitTests - name: Unit tests (32bit) run: | cd ${HOME}/go/src/github.com/${GITHUB_REPOSITORY} go test $(go list ./... | grep -E -v '/v[0-9]+' | grep -v /vendor/) env: GOARCH: 386 INTEGRATION: 1 id: unitTest32dnsutils-2.0.0/.github/workflows/testingv2.yml000066400000000000000000000035721361635461500214440ustar00rootroot00000000000000# Name of the workflow needs to match the name of the major version directory name: v2 on: push: paths: - 'v2/**' pull_request: paths: - 'v2/**' jobs: build: name: Tests runs-on: ubuntu-latest strategy: matrix: go: [ '1.11.x', '1.12.x', '1.13.x' ] env: TEST_KDC_ADDR: 127.0.0.1 TEST_HTTP_URL: http://cname.test.gokrb5 TEST_HTTP_ADDR: 127.0.0.1 DNS_IP: 127.0.88.53 DNSUTILS_OVERRIDE_NS: 127.0.88.53:53 steps: - name: Set up Go ${{ matrix.go }} uses: actions/setup-go@v1 with: go-version: ${{ matrix.go }} - name: Checkout uses: actions/checkout@v2 with: ref: ${{ github.ref }} - name: Test well formatted with gofmt run: | GO_FILES=$(find ${GITHUB_WORKFLOW} -iname '*.go' -type f | grep -v /vendor/) test -z $(gofmt -s -d -l -e $GO_FILES | tee /dev/fd/2 | xargs | sed 's/\s//g') id: gofmt - name: Go vet run: | cd ${GITHUB_WORKFLOW} go vet ./... id: govet - name: Start integration test dependencies run: | sudo docker run -d -h ns.test.gokrb5 -v /etc/localtime:/etc/localtime:ro -e "TEST_KDC_ADDR=${TEST_KDC_ADDR}" -e "TEST_HTTP_ADDR=${TEST_HTTP_ADDR}" -p ${DNSUTILS_OVERRIDE_NS}:53 -p ${DNSUTILS_OVERRIDE_NS}:53/udp --name dns jcmturner/gokrb5:dns sudo sed -i 's/nameserver .*/nameserver '${DNS_IP}'/g' /etc/resolv.conf dig _kerberos._udp.TEST.GOKRB5 id: intgTestDeps - name: Unit tests run: | cd ${GITHUB_WORKFLOW} go test -race ./... env: INTEGRATION: 1 id: unitTests - name: Unit tests (32bit) run: | cd ${GITHUB_WORKFLOW} go test ./... env: GOARCH: 386 INTEGRATION: 1 id: unitTest32dnsutils-2.0.0/.gitignore000066400000000000000000000004231361635461500153570ustar00rootroot00000000000000# Binaries for programs and plugins *.exe *.dll *.so *.dylib # Test binary, build with `go test -c` *.test # Output of the go coverage tool, specifically when used with LiteIDE *.out # Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736 .glide/ dnsutils-2.0.0/LICENSE000066400000000000000000000261351361635461500144040ustar00rootroot00000000000000 Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. 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See the License for the specific language governing permissions and limitations under the License. dnsutils-2.0.0/srv.go000066400000000000000000000043151361635461500145340ustar00rootroot00000000000000package dnsutils import ( "math/rand" "net" "sort" ) // OrderedSRV returns a count of the results and a map keyed on the order they should be used. // This based on the records' priority and randomised selection based on their relative weighting. // The function's inputs are the same as those for net.LookupSRV // To use in the correct order: // // count, orderedSRV, err := OrderedSRV(service, proto, name) // i := 1 // for i <= count { // srv := orderedSRV[i] // // Do something such as dial this SRV. If fails move on the the next or break if it succeeds. // i += 1 // } func OrderedSRV(service, proto, name string) (int, map[int]*net.SRV, error) { _, addrs, err := net.LookupSRV(service, proto, name) if err != nil { return 0, make(map[int]*net.SRV), err } index, osrv := orderSRV(addrs) return index, osrv, nil } func orderSRV(addrs []*net.SRV) (int, map[int]*net.SRV) { // Initialise the ordered map var o int osrv := make(map[int]*net.SRV) prioMap := make(map[int][]*net.SRV, 0) for _, srv := range addrs { prioMap[int(srv.Priority)] = append(prioMap[int(srv.Priority)], srv) } priorities := make([]int, 0) for p := range prioMap { priorities = append(priorities, p) } var count int sort.Ints(priorities) for _, p := range priorities { tos := weightedOrder(prioMap[p]) for i, s := range tos { count += 1 osrv[o+i] = s } o += len(tos) } return count, osrv } func weightedOrder(srvs []*net.SRV) map[int]*net.SRV { // Get the total weight var tw int for _, s := range srvs { tw += int(s.Weight) } // Initialise the ordered map o := 1 osrv := make(map[int]*net.SRV) // Whilst there are still entries to be ordered l := len(srvs) for l > 0 { i := rand.Intn(l) s := srvs[i] var rw int if tw > 0 { // Greater the weight the more likely this will be zero or less rw = rand.Intn(tw) - int(s.Weight) } if rw <= 0 { // Put entry in position osrv[o] = s if len(srvs) > 1 { // Remove the entry from the source slice by swapping with the last entry and truncating srvs[len(srvs)-1], srvs[i] = srvs[i], srvs[len(srvs)-1] srvs = srvs[:len(srvs)-1] l = len(srvs) } else { l = 0 } o += 1 tw = tw - int(s.Weight) } } return osrv } dnsutils-2.0.0/srv_integration_test.go000066400000000000000000000017551361635461500202030ustar00rootroot00000000000000package dnsutils import ( "github.com/stretchr/testify/assert" "os" "strconv" "strings" "testing" ) func TestResolveKDC(t *testing.T) { if os.Getenv("INTEGRATION") != "1" { t.Skip("Skipping integration test") } for i := 0; i < 100; i++ { count, res, err := OrderedSRV("kerberos", "tcp", "test.gokrb5") if err != nil { t.Errorf("error resolving SRV DNS records: %v", err) } expected := []string{ "kdc.test.gokrb5:88", "kdc1a.test.gokrb5:88", "kdc2a.test.gokrb5:88", "kdc1b.test.gokrb5:88", "kdc2b.test.gokrb5:88", } assert.Equal(t, len(expected), count, "Number of SRV records not as expected: %v", res) assert.Equal(t, count, len(res), "Map size does not match: %v", res) for _, s := range expected { var found bool for _, v := range res { srvStr := strings.TrimRight(v.Target, ".") + ":" + strconv.Itoa(int(v.Port)) if s == srvStr { found = true break } } assert.True(t, found, "Record %s not found in results", s) } } } dnsutils-2.0.0/srv_test.go000066400000000000000000000014601361635461500155710ustar00rootroot00000000000000package dnsutils import ( "github.com/stretchr/testify/assert" "net" "testing" ) func TestOrderSRV(t *testing.T) { srv11 := net.SRV{ Target: "t11", Port: 1234, Priority: 1, Weight: 100, } srv12 := net.SRV{ Target: "t12", Port: 1234, Priority: 1, Weight: 100, } srv13 := net.SRV{ Target: "t13", Port: 1234, Priority: 1, Weight: 20, } srv21 := net.SRV{ Target: "t21", Port: 1234, Priority: 2, Weight: 1, } addrs := []*net.SRV{ &srv11, &srv21, &srv12, &srv13, } count, orderedSRV := orderSRV(addrs) assert.Equal(t, len(addrs), count, "Index not the expected size") assert.Equal(t, len(addrs), len(orderedSRV), "orderedSRV not the expected size") assert.Equal(t, uint16(2), orderedSRV[4].Priority, "Priority order not as expected") } dnsutils-2.0.0/v2/000077500000000000000000000000001361635461500137175ustar00rootroot00000000000000dnsutils-2.0.0/v2/go.mod000066400000000000000000000001351361635461500150240ustar00rootroot00000000000000module github.com/jcmturner/dnsutils/v2 go 1.13 require github.com/stretchr/testify v1.4.0 dnsutils-2.0.0/v2/go.sum000066400000000000000000000015431361635461500150550ustar00rootroot00000000000000github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8= github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk= github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4= gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw= gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= dnsutils-2.0.0/v2/srv.go000066400000000000000000000043151361635461500150630ustar00rootroot00000000000000package dnsutils import ( "math/rand" "net" "sort" ) // OrderedSRV returns a count of the results and a map keyed on the order they should be used. // This based on the records' priority and randomised selection based on their relative weighting. // The function's inputs are the same as those for net.LookupSRV // To use in the correct order: // // count, orderedSRV, err := OrderedSRV(service, proto, name) // i := 1 // for i <= count { // srv := orderedSRV[i] // // Do something such as dial this SRV. If fails move on the the next or break if it succeeds. // i += 1 // } func OrderedSRV(service, proto, name string) (int, map[int]*net.SRV, error) { _, addrs, err := net.LookupSRV(service, proto, name) if err != nil { return 0, make(map[int]*net.SRV), err } index, osrv := orderSRV(addrs) return index, osrv, nil } func orderSRV(addrs []*net.SRV) (int, map[int]*net.SRV) { // Initialise the ordered map var o int osrv := make(map[int]*net.SRV) prioMap := make(map[int][]*net.SRV, 0) for _, srv := range addrs { prioMap[int(srv.Priority)] = append(prioMap[int(srv.Priority)], srv) } priorities := make([]int, 0) for p := range prioMap { priorities = append(priorities, p) } var count int sort.Ints(priorities) for _, p := range priorities { tos := weightedOrder(prioMap[p]) for i, s := range tos { count += 1 osrv[o+i] = s } o += len(tos) } return count, osrv } func weightedOrder(srvs []*net.SRV) map[int]*net.SRV { // Get the total weight var tw int for _, s := range srvs { tw += int(s.Weight) } // Initialise the ordered map o := 1 osrv := make(map[int]*net.SRV) // Whilst there are still entries to be ordered l := len(srvs) for l > 0 { i := rand.Intn(l) s := srvs[i] var rw int if tw > 0 { // Greater the weight the more likely this will be zero or less rw = rand.Intn(tw) - int(s.Weight) } if rw <= 0 { // Put entry in position osrv[o] = s if len(srvs) > 1 { // Remove the entry from the source slice by swapping with the last entry and truncating srvs[len(srvs)-1], srvs[i] = srvs[i], srvs[len(srvs)-1] srvs = srvs[:len(srvs)-1] l = len(srvs) } else { l = 0 } o += 1 tw = tw - int(s.Weight) } } return osrv } dnsutils-2.0.0/v2/srv_integration_test.go000066400000000000000000000017561361635461500205330ustar00rootroot00000000000000package dnsutils import ( "github.com/stretchr/testify/assert" "os" "strconv" "strings" "testing" ) func TestResolveKDC(t *testing.T) { if os.Getenv("INTEGRATION") != "1" { t.Skip("Skipping integration test.") } for i := 0; i < 100; i++ { count, res, err := OrderedSRV("kerberos", "tcp", "test.gokrb5") if err != nil { t.Errorf("error resolving SRV DNS records: %v", err) } expected := []string{ "kdc.test.gokrb5:88", "kdc1a.test.gokrb5:88", "kdc2a.test.gokrb5:88", "kdc1b.test.gokrb5:88", "kdc2b.test.gokrb5:88", } assert.Equal(t, len(expected), count, "Number of SRV records not as expected: %v", res) assert.Equal(t, count, len(res), "Map size does not match: %v", res) for _, s := range expected { var found bool for _, v := range res { srvStr := strings.TrimRight(v.Target, ".") + ":" + strconv.Itoa(int(v.Port)) if s == srvStr { found = true break } } assert.True(t, found, "Record %s not found in results", s) } } } dnsutils-2.0.0/v2/srv_test.go000066400000000000000000000014601361635461500161200ustar00rootroot00000000000000package dnsutils import ( "github.com/stretchr/testify/assert" "net" "testing" ) func TestOrderSRV(t *testing.T) { srv11 := net.SRV{ Target: "t11", Port: 1234, Priority: 1, Weight: 100, } srv12 := net.SRV{ Target: "t12", Port: 1234, Priority: 1, Weight: 100, } srv13 := net.SRV{ Target: "t13", Port: 1234, Priority: 1, Weight: 20, } srv21 := net.SRV{ Target: "t21", Port: 1234, Priority: 2, Weight: 1, } addrs := []*net.SRV{ &srv11, &srv21, &srv12, &srv13, } count, orderedSRV := orderSRV(addrs) assert.Equal(t, len(addrs), count, "Index not the expected size") assert.Equal(t, len(addrs), len(orderedSRV), "orderedSRV not the expected size") assert.Equal(t, uint16(2), orderedSRV[4].Priority, "Priority order not as expected") }