From 621e49bb465f500cc46d47e39e828cf76d6381d7 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Tue, 24 Jul 2018 14:35:44 +0200 Subject: update vendor --- .../x/net/dns/dnsmessage/message_test.go | 1451 ++++++++++++++++++++ 1 file changed, 1451 insertions(+) create mode 100644 vendor/golang.org/x/net/dns/dnsmessage/message_test.go (limited to 'vendor/golang.org/x/net/dns/dnsmessage/message_test.go') diff --git a/vendor/golang.org/x/net/dns/dnsmessage/message_test.go b/vendor/golang.org/x/net/dns/dnsmessage/message_test.go new file mode 100644 index 0000000..25ba8f0 --- /dev/null +++ b/vendor/golang.org/x/net/dns/dnsmessage/message_test.go @@ -0,0 +1,1451 @@ +// Copyright 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. + +package dnsmessage + +import ( + "bytes" + "fmt" + "reflect" + "strings" + "testing" +) + +func TestPrintPaddedUint8(t *testing.T) { + tests := []struct { + num uint8 + want string + }{ + {0, "000"}, + {1, "001"}, + {9, "009"}, + {10, "010"}, + {99, "099"}, + {100, "100"}, + {124, "124"}, + {104, "104"}, + {120, "120"}, + {255, "255"}, + } + + for _, test := range tests { + if got := printPaddedUint8(test.num); got != test.want { + t.Errorf("got printPaddedUint8(%d) = %s, want = %s", test.num, got, test.want) + } + } +} + +func TestPrintUint8Bytes(t *testing.T) { + tests := []uint8{ + 0, + 1, + 9, + 10, + 99, + 100, + 124, + 104, + 120, + 255, + } + + for _, test := range tests { + if got, want := string(printUint8Bytes(nil, test)), fmt.Sprint(test); got != want { + t.Errorf("got printUint8Bytes(%d) = %s, want = %s", test, got, want) + } + } +} + +func TestPrintUint16(t *testing.T) { + tests := []uint16{ + 65535, + 0, + 1, + 10, + 100, + 1000, + 10000, + 324, + 304, + 320, + } + + for _, test := range tests { + if got, want := printUint16(test), fmt.Sprint(test); got != want { + t.Errorf("got printUint16(%d) = %s, want = %s", test, got, want) + } + } +} + +func TestPrintUint32(t *testing.T) { + tests := []uint32{ + 4294967295, + 65535, + 0, + 1, + 10, + 100, + 1000, + 10000, + 100000, + 1000000, + 10000000, + 100000000, + 1000000000, + 324, + 304, + 320, + } + + for _, test := range tests { + if got, want := printUint32(test), fmt.Sprint(test); got != want { + t.Errorf("got printUint32(%d) = %s, want = %s", test, got, want) + } + } +} + +func mustEDNS0ResourceHeader(l int, extrc RCode, do bool) ResourceHeader { + h := ResourceHeader{Class: ClassINET} + if err := h.SetEDNS0(l, extrc, do); err != nil { + panic(err) + } + return h +} + +func (m *Message) String() string { + s := fmt.Sprintf("Message: %#v\n", &m.Header) + if len(m.Questions) > 0 { + s += "-- Questions\n" + for _, q := range m.Questions { + s += fmt.Sprintf("%#v\n", q) + } + } + if len(m.Answers) > 0 { + s += "-- Answers\n" + for _, a := range m.Answers { + s += fmt.Sprintf("%#v\n", a) + } + } + if len(m.Authorities) > 0 { + s += "-- Authorities\n" + for _, ns := range m.Authorities { + s += fmt.Sprintf("%#v\n", ns) + } + } + if len(m.Additionals) > 0 { + s += "-- Additionals\n" + for _, e := range m.Additionals { + s += fmt.Sprintf("%#v\n", e) + } + } + return s +} + +func TestNameString(t *testing.T) { + want := "foo" + name := MustNewName(want) + if got := fmt.Sprint(name); got != want { + t.Errorf("got fmt.Sprint(%#v) = %s, want = %s", name, got, want) + } +} + +func TestQuestionPackUnpack(t *testing.T) { + want := Question{ + Name: MustNewName("."), + Type: TypeA, + Class: ClassINET, + } + buf, err := want.pack(make([]byte, 1, 50), map[string]int{}, 1) + if err != nil { + t.Fatal("Question.pack() =", err) + } + var p Parser + p.msg = buf + p.header.questions = 1 + p.section = sectionQuestions + p.off = 1 + got, err := p.Question() + if err != nil { + t.Fatalf("Parser{%q}.Question() = %v", string(buf[1:]), err) + } + if p.off != len(buf) { + t.Errorf("unpacked different amount than packed: got = %d, want = %d", p.off, len(buf)) + } + if !reflect.DeepEqual(got, want) { + t.Errorf("got from Parser.Question() = %+v, want = %+v", got, want) + } +} + +func TestName(t *testing.T) { + tests := []string{ + "", + ".", + "google..com", + "google.com", + "google..com.", + "google.com.", + ".google.com.", + "www..google.com.", + "www.google.com.", + } + + for _, test := range tests { + n, err := NewName(test) + if err != nil { + t.Errorf("NewName(%q) = %v", test, err) + continue + } + if ns := n.String(); ns != test { + t.Errorf("got %#v.String() = %q, want = %q", n, ns, test) + continue + } + } +} + +func TestNamePackUnpack(t *testing.T) { + tests := []struct { + in string + want string + err error + }{ + {"", "", errNonCanonicalName}, + {".", ".", nil}, + {"google..com", "", errNonCanonicalName}, + {"google.com", "", errNonCanonicalName}, + {"google..com.", "", errZeroSegLen}, + {"google.com.", "google.com.", nil}, + {".google.com.", "", errZeroSegLen}, + {"www..google.com.", "", errZeroSegLen}, + {"www.google.com.", "www.google.com.", nil}, + } + + for _, test := range tests { + in := MustNewName(test.in) + want := MustNewName(test.want) + buf, err := in.pack(make([]byte, 0, 30), map[string]int{}, 0) + if err != test.err { + t.Errorf("got %q.pack() = %v, want = %v", test.in, err, test.err) + continue + } + if test.err != nil { + continue + } + var got Name + n, err := got.unpack(buf, 0) + if err != nil { + t.Errorf("%q.unpack() = %v", test.in, err) + continue + } + if n != len(buf) { + t.Errorf( + "unpacked different amount than packed for %q: got = %d, want = %d", + test.in, + n, + len(buf), + ) + } + if got != want { + t.Errorf("unpacking packing of %q: got = %#v, want = %#v", test.in, got, want) + } + } +} + +func TestIncompressibleName(t *testing.T) { + name := MustNewName("example.com.") + compression := map[string]int{} + buf, err := name.pack(make([]byte, 0, 100), compression, 0) + if err != nil { + t.Fatal("first Name.pack() =", err) + } + buf, err = name.pack(buf, compression, 0) + if err != nil { + t.Fatal("second Name.pack() =", err) + } + var n1 Name + off, err := n1.unpackCompressed(buf, 0, false /* allowCompression */) + if err != nil { + t.Fatal("unpacking incompressible name without pointers failed:", err) + } + var n2 Name + if _, err := n2.unpackCompressed(buf, off, false /* allowCompression */); err != errCompressedSRV { + t.Errorf("unpacking compressed incompressible name with pointers: got %v, want = %v", err, errCompressedSRV) + } +} + +func checkErrorPrefix(err error, prefix string) bool { + e, ok := err.(*nestedError) + return ok && e.s == prefix +} + +func TestHeaderUnpackError(t *testing.T) { + wants := []string{ + "id", + "bits", + "questions", + "answers", + "authorities", + "additionals", + } + var buf []byte + var h header + for _, want := range wants { + n, err := h.unpack(buf, 0) + if n != 0 || !checkErrorPrefix(err, want) { + t.Errorf("got header.unpack([%d]byte, 0) = %d, %v, want = 0, %s", len(buf), n, err, want) + } + buf = append(buf, 0, 0) + } +} + +func TestParserStart(t *testing.T) { + const want = "unpacking header" + var p Parser + for i := 0; i <= 1; i++ { + _, err := p.Start([]byte{}) + if !checkErrorPrefix(err, want) { + t.Errorf("got Parser.Start(nil) = _, %v, want = _, %s", err, want) + } + } +} + +func TestResourceNotStarted(t *testing.T) { + tests := []struct { + name string + fn func(*Parser) error + }{ + {"CNAMEResource", func(p *Parser) error { _, err := p.CNAMEResource(); return err }}, + {"MXResource", func(p *Parser) error { _, err := p.MXResource(); return err }}, + {"NSResource", func(p *Parser) error { _, err := p.NSResource(); return err }}, + {"PTRResource", func(p *Parser) error { _, err := p.PTRResource(); return err }}, + {"SOAResource", func(p *Parser) error { _, err := p.SOAResource(); return err }}, + {"TXTResource", func(p *Parser) error { _, err := p.TXTResource(); return err }}, + {"SRVResource", func(p *Parser) error { _, err := p.SRVResource(); return err }}, + {"AResource", func(p *Parser) error { _, err := p.AResource(); return err }}, + {"AAAAResource", func(p *Parser) error { _, err := p.AAAAResource(); return err }}, + } + + for _, test := range tests { + if err := test.fn(&Parser{}); err != ErrNotStarted { + t.Errorf("got Parser.%s() = _ , %v, want = _, %v", test.name, err, ErrNotStarted) + } + } +} + +func TestDNSPackUnpack(t *testing.T) { + wants := []Message{ + { + Questions: []Question{ + { + Name: MustNewName("."), + Type: TypeAAAA, + Class: ClassINET, + }, + }, + Answers: []Resource{}, + Authorities: []Resource{}, + Additionals: []Resource{}, + }, + largeTestMsg(), + } + for i, want := range wants { + b, err := want.Pack() + if err != nil { + t.Fatalf("%d: Message.Pack() = %v", i, err) + } + var got Message + err = got.Unpack(b) + if err != nil { + t.Fatalf("%d: Message.Unapck() = %v", i, err) + } + if !reflect.DeepEqual(got, want) { + t.Errorf("%d: Message.Pack/Unpack() roundtrip: got = %+v, want = %+v", i, &got, &want) + } + } +} + +func TestDNSAppendPackUnpack(t *testing.T) { + wants := []Message{ + { + Questions: []Question{ + { + Name: MustNewName("."), + Type: TypeAAAA, + Class: ClassINET, + }, + }, + Answers: []Resource{}, + Authorities: []Resource{}, + Additionals: []Resource{}, + }, + largeTestMsg(), + } + for i, want := range wants { + b := make([]byte, 2, 514) + b, err := want.AppendPack(b) + if err != nil { + t.Fatalf("%d: Message.AppendPack() = %v", i, err) + } + b = b[2:] + var got Message + err = got.Unpack(b) + if err != nil { + t.Fatalf("%d: Message.Unapck() = %v", i, err) + } + if !reflect.DeepEqual(got, want) { + t.Errorf("%d: Message.AppendPack/Unpack() roundtrip: got = %+v, want = %+v", i, &got, &want) + } + } +} + +func TestSkipAll(t *testing.T) { + msg := largeTestMsg() + buf, err := msg.Pack() + if err != nil { + t.Fatal("Message.Pack() =", err) + } + var p Parser + if _, err := p.Start(buf); err != nil { + t.Fatal("Parser.Start(non-nil) =", err) + } + + tests := []struct { + name string + f func() error + }{ + {"SkipAllQuestions", p.SkipAllQuestions}, + {"SkipAllAnswers", p.SkipAllAnswers}, + {"SkipAllAuthorities", p.SkipAllAuthorities}, + {"SkipAllAdditionals", p.SkipAllAdditionals}, + } + for _, test := range tests { + for i := 1; i <= 3; i++ { + if err := test.f(); err != nil { + t.Errorf("%d: Parser.%s() = %v", i, test.name, err) + } + } + } +} + +func TestSkipEach(t *testing.T) { + msg := smallTestMsg() + + buf, err := msg.Pack() + if err != nil { + t.Fatal("Message.Pack() =", err) + } + var p Parser + if _, err := p.Start(buf); err != nil { + t.Fatal("Parser.Start(non-nil) =", err) + } + + tests := []struct { + name string + f func() error + }{ + {"SkipQuestion", p.SkipQuestion}, + {"SkipAnswer", p.SkipAnswer}, + {"SkipAuthority", p.SkipAuthority}, + {"SkipAdditional", p.SkipAdditional}, + } + for _, test := range tests { + if err := test.f(); err != nil { + t.Errorf("first Parser.%s() = %v, want = nil", test.name, err) + } + if err := test.f(); err != ErrSectionDone { + t.Errorf("second Parser.%s() = %v, want = %v", test.name, err, ErrSectionDone) + } + } +} + +func TestSkipAfterRead(t *testing.T) { + msg := smallTestMsg() + + buf, err := msg.Pack() + if err != nil { + t.Fatal("Message.Pack() =", err) + } + var p Parser + if _, err := p.Start(buf); err != nil { + t.Fatal("Parser.Srart(non-nil) =", err) + } + + tests := []struct { + name string + skip func() error + read func() error + }{ + {"Question", p.SkipQuestion, func() error { _, err := p.Question(); return err }}, + {"Answer", p.SkipAnswer, func() error { _, err := p.Answer(); return err }}, + {"Authority", p.SkipAuthority, func() error { _, err := p.Authority(); return err }}, + {"Additional", p.SkipAdditional, func() error { _, err := p.Additional(); return err }}, + } + for _, test := range tests { + if err := test.read(); err != nil { + t.Errorf("got Parser.%s() = _, %v, want = _, nil", test.name, err) + } + if err := test.skip(); err != ErrSectionDone { + t.Errorf("got Parser.Skip%s() = %v, want = %v", test.name, err, ErrSectionDone) + } + } +} + +func TestSkipNotStarted(t *testing.T) { + var p Parser + + tests := []struct { + name string + f func() error + }{ + {"SkipAllQuestions", p.SkipAllQuestions}, + {"SkipAllAnswers", p.SkipAllAnswers}, + {"SkipAllAuthorities", p.SkipAllAuthorities}, + {"SkipAllAdditionals", p.SkipAllAdditionals}, + } + for _, test := range tests { + if err := test.f(); err != ErrNotStarted { + t.Errorf("got Parser.%s() = %v, want = %v", test.name, err, ErrNotStarted) + } + } +} + +func TestTooManyRecords(t *testing.T) { + const recs = int(^uint16(0)) + 1 + tests := []struct { + name string + msg Message + want error + }{ + { + "Questions", + Message{ + Questions: make([]Question, recs), + }, + errTooManyQuestions, + }, + { + "Answers", + Message{ + Answers: make([]Resource, recs), + }, + errTooManyAnswers, + }, + { + "Authorities", + Message{ + Authorities: make([]Resource, recs), + }, + errTooManyAuthorities, + }, + { + "Additionals", + Message{ + Additionals: make([]Resource, recs), + }, + errTooManyAdditionals, + }, + } + + for _, test := range tests { + if _, got := test.msg.Pack(); got != test.want { + t.Errorf("got Message.Pack() for %d %s = %v, want = %v", recs, test.name, got, test.want) + } + } +} + +func TestVeryLongTxt(t *testing.T) { + want := Resource{ + ResourceHeader{ + Name: MustNewName("foo.bar.example.com."), + Type: TypeTXT, + Class: ClassINET, + }, + &TXTResource{[]string{ + "", + "", + "foo bar", + "", + "www.example.com", + "www.example.com.", + strings.Repeat(".", 255), + }}, + } + buf, err := want.pack(make([]byte, 0, 8000), map[string]int{}, 0) + if err != nil { + t.Fatal("Resource.pack() =", err) + } + var got Resource + off, err := got.Header.unpack(buf, 0) + if err != nil { + t.Fatal("ResourceHeader.unpack() =", err) + } + body, n, err := unpackResourceBody(buf, off, got.Header) + if err != nil { + t.Fatal("unpackResourceBody() =", err) + } + got.Body = body + if n != len(buf) { + t.Errorf("unpacked different amount than packed: got = %d, want = %d", n, len(buf)) + } + if !reflect.DeepEqual(got, want) { + t.Errorf("Resource.pack/unpack() roundtrip: got = %#v, want = %#v", got, want) + } +} + +func TestTooLongTxt(t *testing.T) { + rb := TXTResource{[]string{strings.Repeat(".", 256)}} + if _, err := rb.pack(make([]byte, 0, 8000), map[string]int{}, 0); err != errStringTooLong { + t.Errorf("packing TXTResource with 256 character string: got err = %v, want = %v", err, errStringTooLong) + } +} + +func TestStartAppends(t *testing.T) { + buf := make([]byte, 2, 514) + wantBuf := []byte{4, 44} + copy(buf, wantBuf) + + b := NewBuilder(buf, Header{}) + b.EnableCompression() + + buf, err := b.Finish() + if err != nil { + t.Fatal("Builder.Finish() =", err) + } + if got, want := len(buf), headerLen+2; got != want { + t.Errorf("got len(buf) = %d, want = %d", got, want) + } + if string(buf[:2]) != string(wantBuf) { + t.Errorf("original data not preserved, got = %#v, want = %#v", buf[:2], wantBuf) + } +} + +func TestStartError(t *testing.T) { + tests := []struct { + name string + fn func(*Builder) error + }{ + {"Questions", func(b *Builder) error { return b.StartQuestions() }}, + {"Answers", func(b *Builder) error { return b.StartAnswers() }}, + {"Authorities", func(b *Builder) error { return b.StartAuthorities() }}, + {"Additionals", func(b *Builder) error { return b.StartAdditionals() }}, + } + + envs := []struct { + name string + fn func() *Builder + want error + }{ + {"sectionNotStarted", func() *Builder { return &Builder{section: sectionNotStarted} }, ErrNotStarted}, + {"sectionDone", func() *Builder { return &Builder{section: sectionDone} }, ErrSectionDone}, + } + + for _, env := range envs { + for _, test := range tests { + if got := test.fn(env.fn()); got != env.want { + t.Errorf("got Builder{%s}.Start%s() = %v, want = %v", env.name, test.name, got, env.want) + } + } + } +} + +func TestBuilderResourceError(t *testing.T) { + tests := []struct { + name string + fn func(*Builder) error + }{ + {"CNAMEResource", func(b *Builder) error { return b.CNAMEResource(ResourceHeader{}, CNAMEResource{}) }}, + {"MXResource", func(b *Builder) error { return b.MXResource(ResourceHeader{}, MXResource{}) }}, + {"NSResource", func(b *Builder) error { return b.NSResource(ResourceHeader{}, NSResource{}) }}, + {"PTRResource", func(b *Builder) error { return b.PTRResource(ResourceHeader{}, PTRResource{}) }}, + {"SOAResource", func(b *Builder) error { return b.SOAResource(ResourceHeader{}, SOAResource{}) }}, + {"TXTResource", func(b *Builder) error { return b.TXTResource(ResourceHeader{}, TXTResource{}) }}, + {"SRVResource", func(b *Builder) error { return b.SRVResource(ResourceHeader{}, SRVResource{}) }}, + {"AResource", func(b *Builder) error { return b.AResource(ResourceHeader{}, AResource{}) }}, + {"AAAAResource", func(b *Builder) error { return b.AAAAResource(ResourceHeader{}, AAAAResource{}) }}, + {"OPTResource", func(b *Builder) error { return b.OPTResource(ResourceHeader{}, OPTResource{}) }}, + } + + envs := []struct { + name string + fn func() *Builder + want error + }{ + {"sectionNotStarted", func() *Builder { return &Builder{section: sectionNotStarted} }, ErrNotStarted}, + {"sectionHeader", func() *Builder { return &Builder{section: sectionHeader} }, ErrNotStarted}, + {"sectionQuestions", func() *Builder { return &Builder{section: sectionQuestions} }, ErrNotStarted}, + {"sectionDone", func() *Builder { return &Builder{section: sectionDone} }, ErrSectionDone}, + } + + for _, env := range envs { + for _, test := range tests { + if got := test.fn(env.fn()); got != env.want { + t.Errorf("got Builder{%s}.%s() = %v, want = %v", env.name, test.name, got, env.want) + } + } + } +} + +func TestFinishError(t *testing.T) { + var b Builder + want := ErrNotStarted + if _, got := b.Finish(); got != want { + t.Errorf("got Builder.Finish() = %v, want = %v", got, want) + } +} + +func TestBuilder(t *testing.T) { + msg := largeTestMsg() + want, err := msg.Pack() + if err != nil { + t.Fatal("Message.Pack() =", err) + } + + b := NewBuilder(nil, msg.Header) + b.EnableCompression() + + if err := b.StartQuestions(); err != nil { + t.Fatal("Builder.StartQuestions() =", err) + } + for _, q := range msg.Questions { + if err := b.Question(q); err != nil { + t.Fatalf("Builder.Question(%#v) = %v", q, err) + } + } + + if err := b.StartAnswers(); err != nil { + t.Fatal("Builder.StartAnswers() =", err) + } + for _, a := range msg.Answers { + switch a.Header.Type { + case TypeA: + if err := b.AResource(a.Header, *a.Body.(*AResource)); err != nil { + t.Fatalf("Builder.AResource(%#v) = %v", a, err) + } + case TypeNS: + if err := b.NSResource(a.Header, *a.Body.(*NSResource)); err != nil { + t.Fatalf("Builder.NSResource(%#v) = %v", a, err) + } + case TypeCNAME: + if err := b.CNAMEResource(a.Header, *a.Body.(*CNAMEResource)); err != nil { + t.Fatalf("Builder.CNAMEResource(%#v) = %v", a, err) + } + case TypeSOA: + if err := b.SOAResource(a.Header, *a.Body.(*SOAResource)); err != nil { + t.Fatalf("Builder.SOAResource(%#v) = %v", a, err) + } + case TypePTR: + if err := b.PTRResource(a.Header, *a.Body.(*PTRResource)); err != nil { + t.Fatalf("Builder.PTRResource(%#v) = %v", a, err) + } + case TypeMX: + if err := b.MXResource(a.Header, *a.Body.(*MXResource)); err != nil { + t.Fatalf("Builder.MXResource(%#v) = %v", a, err) + } + case TypeTXT: + if err := b.TXTResource(a.Header, *a.Body.(*TXTResource)); err != nil { + t.Fatalf("Builder.TXTResource(%#v) = %v", a, err) + } + case TypeAAAA: + if err := b.AAAAResource(a.Header, *a.Body.(*AAAAResource)); err != nil { + t.Fatalf("Builder.AAAAResource(%#v) = %v", a, err) + } + case TypeSRV: + if err := b.SRVResource(a.Header, *a.Body.(*SRVResource)); err != nil { + t.Fatalf("Builder.SRVResource(%#v) = %v", a, err) + } + } + } + + if err := b.StartAuthorities(); err != nil { + t.Fatal("Builder.StartAuthorities() =", err) + } + for _, a := range msg.Authorities { + if err := b.NSResource(a.Header, *a.Body.(*NSResource)); err != nil { + t.Fatalf("Builder.NSResource(%#v) = %v", a, err) + } + } + + if err := b.StartAdditionals(); err != nil { + t.Fatal("Builder.StartAdditionals() =", err) + } + for _, a := range msg.Additionals { + switch a.Body.(type) { + case *TXTResource: + if err := b.TXTResource(a.Header, *a.Body.(*TXTResource)); err != nil { + t.Fatalf("Builder.TXTResource(%#v) = %v", a, err) + } + case *OPTResource: + if err := b.OPTResource(a.Header, *a.Body.(*OPTResource)); err != nil { + t.Fatalf("Builder.OPTResource(%#v) = %v", a, err) + } + } + } + + got, err := b.Finish() + if err != nil { + t.Fatal("Builder.Finish() =", err) + } + if !bytes.Equal(got, want) { + t.Fatalf("got from Builder.Finish() = %#v\nwant = %#v", got, want) + } +} + +func TestResourcePack(t *testing.T) { + for _, tt := range []struct { + m Message + err error + }{ + { + Message{ + Questions: []Question{ + { + Name: MustNewName("."), + Type: TypeAAAA, + Class: ClassINET, + }, + }, + Answers: []Resource{{ResourceHeader{}, nil}}, + }, + &nestedError{"packing Answer", errNilResouceBody}, + }, + { + Message{ + Questions: []Question{ + { + Name: MustNewName("."), + Type: TypeAAAA, + Class: ClassINET, + }, + }, + Authorities: []Resource{{ResourceHeader{}, (*NSResource)(nil)}}, + }, + &nestedError{"packing Authority", + &nestedError{"ResourceHeader", + &nestedError{"Name", errNonCanonicalName}, + }, + }, + }, + { + Message{ + Questions: []Question{ + { + Name: MustNewName("."), + Type: TypeA, + Class: ClassINET, + }, + }, + Additionals: []Resource{{ResourceHeader{}, nil}}, + }, + &nestedError{"packing Additional", errNilResouceBody}, + }, + } { + _, err := tt.m.Pack() + if !reflect.DeepEqual(err, tt.err) { + t.Errorf("got Message{%v}.Pack() = %v, want %v", tt.m, err, tt.err) + } + } +} + +func TestResourcePackLength(t *testing.T) { + r := Resource{ + ResourceHeader{ + Name: MustNewName("."), + Type: TypeA, + Class: ClassINET, + }, + &AResource{[4]byte{127, 0, 0, 2}}, + } + + hb, _, err := r.Header.pack(nil, nil, 0) + if err != nil { + t.Fatal("ResourceHeader.pack() =", err) + } + buf := make([]byte, 0, len(hb)) + buf, err = r.pack(buf, nil, 0) + if err != nil { + t.Fatal("Resource.pack() =", err) + } + + var hdr ResourceHeader + if _, err := hdr.unpack(buf, 0); err != nil { + t.Fatal("ResourceHeader.unpack() =", err) + } + + if got, want := int(hdr.Length), len(buf)-len(hb); got != want { + t.Errorf("got hdr.Length = %d, want = %d", got, want) + } +} + +func TestOptionPackUnpack(t *testing.T) { + for _, tt := range []struct { + name string + w []byte // wire format of m.Additionals + m Message + dnssecOK bool + extRCode RCode + }{ + { + name: "without EDNS(0) options", + w: []byte{ + 0x00, 0x00, 0x29, 0x10, 0x00, 0xfe, 0x00, 0x80, + 0x00, 0x00, 0x00, + }, + m: Message{ + Header: Header{RCode: RCodeFormatError}, + Questions: []Question{ + { + Name: MustNewName("."), + Type: TypeA, + Class: ClassINET, + }, + }, + Additionals: []Resource{ + { + mustEDNS0ResourceHeader(4096, 0xfe0|RCodeFormatError, true), + &OPTResource{}, + }, + }, + }, + dnssecOK: true, + extRCode: 0xfe0 | RCodeFormatError, + }, + { + name: "with EDNS(0) options", + w: []byte{ + 0x00, 0x00, 0x29, 0x10, 0x00, 0xff, 0x00, 0x00, + 0x00, 0x00, 0x0c, 0x00, 0x0c, 0x00, 0x02, 0x00, + 0x00, 0x00, 0x0b, 0x00, 0x02, 0x12, 0x34, + }, + m: Message{ + Header: Header{RCode: RCodeServerFailure}, + Questions: []Question{ + { + Name: MustNewName("."), + Type: TypeAAAA, + Class: ClassINET, + }, + }, + Additionals: []Resource{ + { + mustEDNS0ResourceHeader(4096, 0xff0|RCodeServerFailure, false), + &OPTResource{ + Options: []Option{ + { + Code: 12, // see RFC 7828 + Data: []byte{0x00, 0x00}, + }, + { + Code: 11, // see RFC 7830 + Data: []byte{0x12, 0x34}, + }, + }, + }, + }, + }, + }, + dnssecOK: false, + extRCode: 0xff0 | RCodeServerFailure, + }, + { + // Containing multiple OPT resources in a + // message is invalid, but it's necessary for + // protocol conformance testing. + name: "with multiple OPT resources", + w: []byte{ + 0x00, 0x00, 0x29, 0x10, 0x00, 0xff, 0x00, 0x00, + 0x00, 0x00, 0x06, 0x00, 0x0b, 0x00, 0x02, 0x12, + 0x34, 0x00, 0x00, 0x29, 0x10, 0x00, 0xff, 0x00, + 0x00, 0x00, 0x00, 0x06, 0x00, 0x0c, 0x00, 0x02, + 0x00, 0x00, + }, + m: Message{ + Header: Header{RCode: RCodeNameError}, + Questions: []Question{ + { + Name: MustNewName("."), + Type: TypeAAAA, + Class: ClassINET, + }, + }, + Additionals: []Resource{ + { + mustEDNS0ResourceHeader(4096, 0xff0|RCodeNameError, false), + &OPTResource{ + Options: []Option{ + { + Code: 11, // see RFC 7830 + Data: []byte{0x12, 0x34}, + }, + }, + }, + }, + { + mustEDNS0ResourceHeader(4096, 0xff0|RCodeNameError, false), + &OPTResource{ + Options: []Option{ + { + Code: 12, // see RFC 7828 + Data: []byte{0x00, 0x00}, + }, + }, + }, + }, + }, + }, + }, + } { + w, err := tt.m.Pack() + if err != nil { + t.Errorf("Message.Pack() for %s = %v", tt.name, err) + continue + } + if !bytes.Equal(w[len(w)-len(tt.w):], tt.w) { + t.Errorf("got Message.Pack() for %s = %#v, want %#v", tt.name, w[len(w)-len(tt.w):], tt.w) + continue + } + var m Message + if err := m.Unpack(w); err != nil { + t.Errorf("Message.Unpack() for %s = %v", tt.name, err) + continue + } + if !reflect.DeepEqual(m.Additionals, tt.m.Additionals) { + t.Errorf("got Message.Pack/Unpack() roundtrip for %s = %+v, want %+v", tt.name, m, tt.m) + continue + } + } +} + +// TestGoString tests that Message.GoString produces Go code that compiles to +// reproduce the Message. +// +// This test was produced as follows: +// 1. Run (*Message).GoString on largeTestMsg(). +// 2. Remove "dnsmessage." from the output. +// 3. Paste the result in the test to store it in msg. +// 4. Also put the original output in the test to store in want. +func TestGoString(t *testing.T) { + msg := Message{Header: Header{ID: 0, Response: true, OpCode: 0, Authoritative: true, Truncated: false, RecursionDesired: false, RecursionAvailable: false, RCode: RCodeSuccess}, Questions: []Question{{Name: MustNewName("foo.bar.example.com."), Type: TypeA, Class: ClassINET}}, Answers: []Resource{{Header: ResourceHeader{Name: MustNewName("foo.bar.example.com."), Type: TypeA, Class: ClassINET, TTL: 0, Length: 0}, Body: &AResource{A: [4]byte{127, 0, 0, 1}}}, {Header: ResourceHeader{Name: MustNewName("foo.bar.example.com."), Type: TypeA, Class: ClassINET, TTL: 0, Length: 0}, Body: &AResource{A: [4]byte{127, 0, 0, 2}}}, {Header: ResourceHeader{Name: MustNewName("foo.bar.example.com."), Type: TypeAAAA, Class: ClassINET, TTL: 0, Length: 0}, Body: &AAAAResource{AAAA: [16]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}}}, {Header: ResourceHeader{Name: MustNewName("foo.bar.example.com."), Type: TypeCNAME, Class: ClassINET, TTL: 0, Length: 0}, Body: &CNAMEResource{CNAME: MustNewName("alias.example.com.")}}, {Header: ResourceHeader{Name: MustNewName("foo.bar.example.com."), Type: TypeSOA, Class: ClassINET, TTL: 0, Length: 0}, Body: &SOAResource{NS: MustNewName("ns1.example.com."), MBox: MustNewName("mb.example.com."), Serial: 1, Refresh: 2, Retry: 3, Expire: 4, MinTTL: 5}}, {Header: ResourceHeader{Name: MustNewName("foo.bar.example.com."), Type: TypePTR, Class: ClassINET, TTL: 0, Length: 0}, Body: &PTRResource{PTR: MustNewName("ptr.example.com.")}}, {Header: ResourceHeader{Name: MustNewName("foo.bar.example.com."), Type: TypeMX, Class: ClassINET, TTL: 0, Length: 0}, Body: &MXResource{Pref: 7, MX: MustNewName("mx.example.com.")}}, {Header: ResourceHeader{Name: MustNewName("foo.bar.example.com."), Type: TypeSRV, Class: ClassINET, TTL: 0, Length: 0}, Body: &SRVResource{Priority: 8, Weight: 9, Port: 11, Target: MustNewName("srv.example.com.")}}}, Authorities: []Resource{{Header: ResourceHeader{Name: MustNewName("foo.bar.example.com."), Type: TypeNS, Class: ClassINET, TTL: 0, Length: 0}, Body: &NSResource{NS: MustNewName("ns1.example.com.")}}, {Header: ResourceHeader{Name: MustNewName("foo.bar.example.com."), Type: TypeNS, Class: ClassINET, TTL: 0, Length: 0}, Body: &NSResource{NS: MustNewName("ns2.example.com.")}}}, Additionals: []Resource{{Header: ResourceHeader{Name: MustNewName("foo.bar.example.com."), Type: TypeTXT, Class: ClassINET, TTL: 0, Length: 0}, Body: &TXTResource{TXT: []string{"So Long\x2c and Thanks for All the Fish"}}}, {Header: ResourceHeader{Name: MustNewName("foo.bar.example.com."), Type: TypeTXT, Class: ClassINET, TTL: 0, Length: 0}, Body: &TXTResource{TXT: []string{"Hamster Huey and the Gooey Kablooie"}}}, {Header: ResourceHeader{Name: MustNewName("."), Type: TypeOPT, Class: 4096, TTL: 4261412864, Length: 0}, Body: &OPTResource{Options: []Option{{Code: 10, Data: []byte{1, 35, 69, 103, 137, 171, 205, 239}}}}}}} + if !reflect.DeepEqual(msg, largeTestMsg()) { + t.Error("Message.GoString lost information or largeTestMsg changed: msg != largeTestMsg()") + } + got := msg.GoString() + want := `dnsmessage.Message{Header: dnsmessage.Header{ID: 0, Response: true, OpCode: 0, Authoritative: true, Truncated: false, RecursionDesired: false, RecursionAvailable: false, RCode: dnsmessage.RCodeSuccess}, Questions: []dnsmessage.Question{dnsmessage.Question{Name: dnsmessage.MustNewName("foo.bar.example.com."), Type: dnsmessage.TypeA, Class: dnsmessage.ClassINET}}, Answers: []dnsmessage.Resource{dnsmessage.Resource{Header: dnsmessage.ResourceHeader{Name: dnsmessage.MustNewName("foo.bar.example.com."), Type: dnsmessage.TypeA, Class: dnsmessage.ClassINET, TTL: 0, Length: 0}, Body: &dnsmessage.AResource{A: [4]byte{127, 0, 0, 1}}}, dnsmessage.Resource{Header: dnsmessage.ResourceHeader{Name: dnsmessage.MustNewName("foo.bar.example.com."), Type: dnsmessage.TypeA, Class: dnsmessage.ClassINET, TTL: 0, Length: 0}, Body: &dnsmessage.AResource{A: [4]byte{127, 0, 0, 2}}}, dnsmessage.Resource{Header: dnsmessage.ResourceHeader{Name: dnsmessage.MustNewName("foo.bar.example.com."), Type: dnsmessage.TypeAAAA, Class: dnsmessage.ClassINET, TTL: 0, Length: 0}, Body: &dnsmessage.AAAAResource{AAAA: [16]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}}}, dnsmessage.Resource{Header: dnsmessage.ResourceHeader{Name: dnsmessage.MustNewName("foo.bar.example.com."), Type: dnsmessage.TypeCNAME, Class: dnsmessage.ClassINET, TTL: 0, Length: 0}, Body: &dnsmessage.CNAMEResource{CNAME: dnsmessage.MustNewName("alias.example.com.")}}, dnsmessage.Resource{Header: dnsmessage.ResourceHeader{Name: dnsmessage.MustNewName("foo.bar.example.com."), Type: dnsmessage.TypeSOA, Class: dnsmessage.ClassINET, TTL: 0, Length: 0}, Body: &dnsmessage.SOAResource{NS: dnsmessage.MustNewName("ns1.example.com."), MBox: dnsmessage.MustNewName("mb.example.com."), Serial: 1, Refresh: 2, Retry: 3, Expire: 4, MinTTL: 5}}, dnsmessage.Resource{Header: dnsmessage.ResourceHeader{Name: dnsmessage.MustNewName("foo.bar.example.com."), Type: dnsmessage.TypePTR, Class: dnsmessage.ClassINET, TTL: 0, Length: 0}, Body: &dnsmessage.PTRResource{PTR: dnsmessage.MustNewName("ptr.example.com.")}}, dnsmessage.Resource{Header: dnsmessage.ResourceHeader{Name: dnsmessage.MustNewName("foo.bar.example.com."), Type: dnsmessage.TypeMX, Class: dnsmessage.ClassINET, TTL: 0, Length: 0}, Body: &dnsmessage.MXResource{Pref: 7, MX: dnsmessage.MustNewName("mx.example.com.")}}, dnsmessage.Resource{Header: dnsmessage.ResourceHeader{Name: dnsmessage.MustNewName("foo.bar.example.com."), Type: dnsmessage.TypeSRV, Class: dnsmessage.ClassINET, TTL: 0, Length: 0}, Body: &dnsmessage.SRVResource{Priority: 8, Weight: 9, Port: 11, Target: dnsmessage.MustNewName("srv.example.com.")}}}, Authorities: []dnsmessage.Resource{dnsmessage.Resource{Header: dnsmessage.ResourceHeader{Name: dnsmessage.MustNewName("foo.bar.example.com."), Type: dnsmessage.TypeNS, Class: dnsmessage.ClassINET, TTL: 0, Length: 0}, Body: &dnsmessage.NSResource{NS: dnsmessage.MustNewName("ns1.example.com.")}}, dnsmessage.Resource{Header: dnsmessage.ResourceHeader{Name: dnsmessage.MustNewName("foo.bar.example.com."), Type: dnsmessage.TypeNS, Class: dnsmessage.ClassINET, TTL: 0, Length: 0}, Body: &dnsmessage.NSResource{NS: dnsmessage.MustNewName("ns2.example.com.")}}}, Additionals: []dnsmessage.Resource{dnsmessage.Resource{Header: dnsmessage.ResourceHeader{Name: dnsmessage.MustNewName("foo.bar.example.com."), Type: dnsmessage.TypeTXT, Class: dnsmessage.ClassINET, TTL: 0, Length: 0}, Body: &dnsmessage.TXTResource{TXT: []string{"So Long\x2c and Thanks for All the Fish"}}}, dnsmessage.Resource{Header: dnsmessage.ResourceHeader{Name: dnsmessage.MustNewName("foo.bar.example.com."), Type: dnsmessage.TypeTXT, Class: dnsmessage.ClassINET, TTL: 0, Length: 0}, Body: &dnsmessage.TXTResource{TXT: []string{"Hamster Huey and the Gooey Kablooie"}}}, dnsmessage.Resource{Header: dnsmessage.ResourceHeader{Name: dnsmessage.MustNewName("."), Type: dnsmessage.TypeOPT, Class: 4096, TTL: 4261412864, Length: 0}, Body: &dnsmessage.OPTResource{Options: []dnsmessage.Option{dnsmessage.Option{Code: 10, Data: []byte{1, 35, 69, 103, 137, 171, 205, 239}}}}}}}` + if got != want { + t.Errorf("got msg1.GoString() = %s\nwant = %s", got, want) + } +} + +func benchmarkParsingSetup() ([]byte, error) { + name := MustNewName("foo.bar.example.com.") + msg := Message{ + Header: Header{Response: true, Authoritative: true}, + Questions: []Question{ + { + Name: name, + Type: TypeA, + Class: ClassINET, + }, + }, + Answers: []Resource{ + { + ResourceHeader{ + Name: name, + Class: ClassINET, + }, + &AResource{[4]byte{}}, + }, + { + ResourceHeader{ + Name: name, + Class: ClassINET, + }, + &AAAAResource{[16]byte{}}, + }, + { + ResourceHeader{ + Name: name, + Class: ClassINET, + }, + &CNAMEResource{name}, + }, + { + ResourceHeader{ + Name: name, + Class: ClassINET, + }, + &NSResource{name}, + }, + }, + } + + buf, err := msg.Pack() + if err != nil { + return nil, fmt.Errorf("Message.Pack() = %v", err) + } + return buf, nil +} + +func benchmarkParsing(tb testing.TB, buf []byte) { + var p Parser + if _, err := p.Start(buf); err != nil { + tb.Fatal("Parser.Start(non-nil) =", err) + } + + for { + _, err := p.Question() + if err == ErrSectionDone { + break + } + if err != nil { + tb.Fatal("Parser.Question() =", err) + } + } + + for { + h, err := p.AnswerHeader() + if err == ErrSectionDone { + break + } + if err != nil { + tb.Fatal("Parser.AnswerHeader() =", err) + } + + switch h.Type { + case TypeA: + if _, err := p.AResource(); err != nil { + tb.Fatal("Parser.AResource() =", err) + } + case TypeAAAA: + if _, err := p.AAAAResource(); err != nil { + tb.Fatal("Parser.AAAAResource() =", err) + } + case TypeCNAME: + if _, err := p.CNAMEResource(); err != nil { + tb.Fatal("Parser.CNAMEResource() =", err) + } + case TypeNS: + if _, err := p.NSResource(); err != nil { + tb.Fatal("Parser.NSResource() =", err) + } + case TypeOPT: + if _, err := p.OPTResource(); err != nil { + tb.Fatal("Parser.OPTResource() =", err) + } + default: + tb.Fatalf("got unknown type: %T", h) + } + } +} + +func BenchmarkParsing(b *testing.B) { + buf, err := benchmarkParsingSetup() + if err != nil { + b.Fatal(err) + } + + b.ReportAllocs() + for i := 0; i < b.N; i++ { + benchmarkParsing(b, buf) + } +} + +func TestParsingAllocs(t *testing.T) { + buf, err := benchmarkParsingSetup() + if err != nil { + t.Fatal(err) + } + + if allocs := testing.AllocsPerRun(100, func() { benchmarkParsing(t, buf) }); allocs > 0.5 { + t.Errorf("allocations during parsing: got = %f, want ~0", allocs) + } +} + +func benchmarkBuildingSetup() (Name, []byte) { + name := MustNewName("foo.bar.example.com.") + buf := make([]byte, 0, packStartingCap) + return name, buf +} + +func benchmarkBuilding(tb testing.TB, name Name, buf []byte) { + bld := NewBuilder(buf, Header{Response: true, Authoritative: true}) + + if err := bld.StartQuestions(); err != nil { + tb.Fatal("Builder.StartQuestions() =", err) + } + q := Question{ + Name: name, + Type: TypeA, + Class: ClassINET, + } + if err := bld.Question(q); err != nil { + tb.Fatalf("Builder.Question(%+v) = %v", q, err) + } + + hdr := ResourceHeader{ + Name: name, + Class: ClassINET, + } + if err := bld.StartAnswers(); err != nil { + tb.Fatal("Builder.StartQuestions() =", err) + } + + ar := AResource{[4]byte{}} + if err := bld.AResource(hdr, ar); err != nil { + tb.Fatalf("Builder.AResource(%+v, %+v) = %v", hdr, ar, err) + } + + aaar := AAAAResource{[16]byte{}} + if err := bld.AAAAResource(hdr, aaar); err != nil { + tb.Fatalf("Builder.AAAAResource(%+v, %+v) = %v", hdr, aaar, err) + } + + cnr := CNAMEResource{name} + if err := bld.CNAMEResource(hdr, cnr); err != nil { + tb.Fatalf("Builder.CNAMEResource(%+v, %+v) = %v", hdr, cnr, err) + } + + nsr := NSResource{name} + if err := bld.NSResource(hdr, nsr); err != nil { + tb.Fatalf("Builder.NSResource(%+v, %+v) = %v", hdr, nsr, err) + } + + extrc := 0xfe0 | RCodeNotImplemented + if err := (&hdr).SetEDNS0(4096, extrc, true); err != nil { + tb.Fatalf("ResourceHeader.SetEDNS0(4096, %#x, true) = %v", extrc, err) + } + optr := OPTResource{} + if err := bld.OPTResource(hdr, optr); err != nil { + tb.Fatalf("Builder.OPTResource(%+v, %+v) = %v", hdr, optr, err) + } + + if _, err := bld.Finish(); err != nil { + tb.Fatal("Builder.Finish() =", err) + } +} + +func BenchmarkBuilding(b *testing.B) { + name, buf := benchmarkBuildingSetup() + b.ReportAllocs() + for i := 0; i < b.N; i++ { + benchmarkBuilding(b, name, buf) + } +} + +func TestBuildingAllocs(t *testing.T) { + name, buf := benchmarkBuildingSetup() + if allocs := testing.AllocsPerRun(100, func() { benchmarkBuilding(t, name, buf) }); allocs > 0.5 { + t.Errorf("allocations during building: got = %f, want ~0", allocs) + } +} + +func smallTestMsg() Message { + name := MustNewName("example.com.") + return Message{ + Header: Header{Response: true, Authoritative: true}, + Questions: []Question{ + { + Name: name, + Type: TypeA, + Class: ClassINET, + }, + }, + Answers: []Resource{ + { + ResourceHeader{ + Name: name, + Type: TypeA, + Class: ClassINET, + }, + &AResource{[4]byte{127, 0, 0, 1}}, + }, + }, + Authorities: []Resource{ + { + ResourceHeader{ + Name: name, + Type: TypeA, + Class: ClassINET, + }, + &AResource{[4]byte{127, 0, 0, 1}}, + }, + }, + Additionals: []Resource{ + { + ResourceHeader{ + Name: name, + Type: TypeA, + Class: ClassINET, + }, + &AResource{[4]byte{127, 0, 0, 1}}, + }, + }, + } +} + +func BenchmarkPack(b *testing.B) { + msg := largeTestMsg() + + b.ReportAllocs() + + for i := 0; i < b.N; i++ { + if _, err := msg.Pack(); err != nil { + b.Fatal("Message.Pack() =", err) + } + } +} + +func BenchmarkAppendPack(b *testing.B) { + msg := largeTestMsg() + buf := make([]byte, 0, packStartingCap) + + b.ReportAllocs() + + for i := 0; i < b.N; i++ { + if _, err := msg.AppendPack(buf[:0]); err != nil { + b.Fatal("Message.AppendPack() = ", err) + } + } +} + +func largeTestMsg() Message { + name := MustNewName("foo.bar.example.com.") + return Message{ + Header: Header{Response: true, Authoritative: true}, + Questions: []Question{ + { + Name: name, + Type: TypeA, + Class: ClassINET, + }, + }, + Answers: []Resource{ + { + ResourceHeader{ + Name: name, + Type: TypeA, + Class: ClassINET, + }, + &AResource{[4]byte{127, 0, 0, 1}}, + }, + { + ResourceHeader{ + Name: name, + Type: TypeA, + Class: ClassINET, + }, + &AResource{[4]byte{127, 0, 0, 2}}, + }, + { + ResourceHeader{ + Name: name, + Type: TypeAAAA, + Class: ClassINET, + }, + &AAAAResource{[16]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}}, + }, + { + ResourceHeader{ + Name: name, + Type: TypeCNAME, + Class: ClassINET, + }, + &CNAMEResource{MustNewName("alias.example.com.")}, + }, + { + ResourceHeader{ + Name: name, + Type: TypeSOA, + Class: ClassINET, + }, + &SOAResource{ + NS: MustNewName("ns1.example.com."), + MBox: MustNewName("mb.example.com."), + Serial: 1, + Refresh: 2, + Retry: 3, + Expire: 4, + MinTTL: 5, + }, + }, + { + ResourceHeader{ + Name: name, + Type: TypePTR, + Class: ClassINET, + }, + &PTRResource{MustNewName("ptr.example.com.")}, + }, + { + ResourceHeader{ + Name: name, + Type: TypeMX, + Class: ClassINET, + }, + &MXResource{ + 7, + MustNewName("mx.example.com."), + }, + }, + { + ResourceHeader{ + Name: name, + Type: TypeSRV, + Class: ClassINET, + }, + &SRVResource{ + 8, + 9, + 11, + MustNewName("srv.example.com."), + }, + }, + }, + Authorities: []Resource{ + { + ResourceHeader{ + Name: name, + Type: TypeNS, + Class: ClassINET, + }, + &NSResource{MustNewName("ns1.example.com.")}, + }, + { + ResourceHeader{ + Name: name, + Type: TypeNS, + Class: ClassINET, + }, + &NSResource{MustNewName("ns2.example.com.")}, + }, + }, + Additionals: []Resource{ + { + ResourceHeader{ + Name: name, + Type: TypeTXT, + Class: ClassINET, + }, + &TXTResource{[]string{"So Long, and Thanks for All the Fish"}}, + }, + { + ResourceHeader{ + Name: name, + Type: TypeTXT, + Class: ClassINET, + }, + &TXTResource{[]string{"Hamster Huey and the Gooey Kablooie"}}, + }, + { + mustEDNS0ResourceHeader(4096, 0xfe0|RCodeSuccess, false), + &OPTResource{ + Options: []Option{ + { + Code: 10, // see RFC 7873 + Data: []byte{0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef}, + }, + }, + }, + }, + }, + } +} -- cgit v1.2.3