408 lines
16 KiB
Go
408 lines
16 KiB
Go
package dns
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import (
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"encoding/hex"
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"net"
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"testing"
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)
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func TestPackUnpack(t *testing.T) {
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out := new(Msg)
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out.Answer = make([]RR, 1)
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key := new(DNSKEY)
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key = &DNSKEY{Flags: 257, Protocol: 3, Algorithm: RSASHA1}
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key.Hdr = RR_Header{Name: "miek.nl.", Rrtype: TypeDNSKEY, Class: ClassINET, Ttl: 3600}
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key.PublicKey = "AwEAAaHIwpx3w4VHKi6i1LHnTaWeHCL154Jug0Rtc9ji5qwPXpBo6A5sRv7cSsPQKPIwxLpyCrbJ4mr2L0EPOdvP6z6YfljK2ZmTbogU9aSU2fiq/4wjxbdkLyoDVgtO+JsxNN4bjr4WcWhsmk1Hg93FV9ZpkWb0Tbad8DFqNDzr//kZ"
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out.Answer[0] = key
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msg, err := out.Pack()
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if err != nil {
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t.Error("failed to pack msg with DNSKEY")
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}
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in := new(Msg)
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if in.Unpack(msg) != nil {
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t.Error("failed to unpack msg with DNSKEY")
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}
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sig := new(RRSIG)
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sig = &RRSIG{TypeCovered: TypeDNSKEY, Algorithm: RSASHA1, Labels: 2,
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OrigTtl: 3600, Expiration: 4000, Inception: 4000, KeyTag: 34641, SignerName: "miek.nl.",
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Signature: "AwEAAaHIwpx3w4VHKi6i1LHnTaWeHCL154Jug0Rtc9ji5qwPXpBo6A5sRv7cSsPQKPIwxLpyCrbJ4mr2L0EPOdvP6z6YfljK2ZmTbogU9aSU2fiq/4wjxbdkLyoDVgtO+JsxNN4bjr4WcWhsmk1Hg93FV9ZpkWb0Tbad8DFqNDzr//kZ"}
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sig.Hdr = RR_Header{Name: "miek.nl.", Rrtype: TypeRRSIG, Class: ClassINET, Ttl: 3600}
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out.Answer[0] = sig
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msg, err = out.Pack()
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if err != nil {
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t.Error("failed to pack msg with RRSIG")
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}
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if in.Unpack(msg) != nil {
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t.Error("failed to unpack msg with RRSIG")
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}
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}
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func TestPackUnpack2(t *testing.T) {
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m := new(Msg)
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m.Extra = make([]RR, 1)
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m.Answer = make([]RR, 1)
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dom := "miek.nl."
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rr := new(A)
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rr.Hdr = RR_Header{Name: dom, Rrtype: TypeA, Class: ClassINET, Ttl: 0}
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rr.A = net.IPv4(127, 0, 0, 1)
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x := new(TXT)
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x.Hdr = RR_Header{Name: dom, Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}
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x.Txt = []string{"heelalaollo"}
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m.Extra[0] = x
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m.Answer[0] = rr
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_, err := m.Pack()
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if err != nil {
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t.Error("Packing failed: ", err)
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return
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}
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}
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func TestPackUnpack3(t *testing.T) {
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m := new(Msg)
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m.Extra = make([]RR, 2)
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m.Answer = make([]RR, 1)
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dom := "miek.nl."
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rr := new(A)
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rr.Hdr = RR_Header{Name: dom, Rrtype: TypeA, Class: ClassINET, Ttl: 0}
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rr.A = net.IPv4(127, 0, 0, 1)
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x1 := new(TXT)
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x1.Hdr = RR_Header{Name: dom, Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}
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x1.Txt = []string{}
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x2 := new(TXT)
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x2.Hdr = RR_Header{Name: dom, Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}
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x2.Txt = []string{"heelalaollo"}
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m.Extra[0] = x1
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m.Extra[1] = x2
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m.Answer[0] = rr
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b, err := m.Pack()
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if err != nil {
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t.Error("packing failed: ", err)
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return
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}
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var unpackMsg Msg
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err = unpackMsg.Unpack(b)
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if err != nil {
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t.Error("unpacking failed")
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return
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}
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}
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func TestBailiwick(t *testing.T) {
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yes := map[string]string{
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"miek1.nl": "miek1.nl",
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"miek.nl": "ns.miek.nl",
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".": "miek.nl",
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}
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for parent, child := range yes {
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if !IsSubDomain(parent, child) {
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t.Errorf("%s should be child of %s", child, parent)
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t.Errorf("comparelabels %d", CompareDomainName(parent, child))
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t.Errorf("lenlabels %d %d", CountLabel(parent), CountLabel(child))
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}
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}
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no := map[string]string{
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"www.miek.nl": "ns.miek.nl",
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"m\\.iek.nl": "ns.miek.nl",
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"w\\.iek.nl": "w.iek.nl",
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"p\\\\.iek.nl": "ns.p.iek.nl", // p\\.iek.nl , literal \ in domain name
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"miek.nl": ".",
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}
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for parent, child := range no {
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if IsSubDomain(parent, child) {
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t.Errorf("%s should not be child of %s", child, parent)
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t.Errorf("comparelabels %d", CompareDomainName(parent, child))
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t.Errorf("lenlabels %d %d", CountLabel(parent), CountLabel(child))
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}
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}
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}
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func TestPackNAPTR(t *testing.T) {
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for _, n := range []string{
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`apple.com. IN NAPTR 100 50 "se" "SIP+D2U" "" _sip._udp.apple.com.`,
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`apple.com. IN NAPTR 90 50 "se" "SIP+D2T" "" _sip._tcp.apple.com.`,
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`apple.com. IN NAPTR 50 50 "se" "SIPS+D2T" "" _sips._tcp.apple.com.`,
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} {
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rr := testRR(n)
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msg := make([]byte, rr.len())
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if off, err := PackRR(rr, msg, 0, nil, false); err != nil {
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t.Errorf("packing failed: %v", err)
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t.Errorf("length %d, need more than %d", rr.len(), off)
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}
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}
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}
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func TestCompressLength(t *testing.T) {
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m := new(Msg)
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m.SetQuestion("miek.nl", TypeMX)
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ul := m.Len()
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m.Compress = true
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if ul != m.Len() {
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t.Fatalf("should be equal")
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}
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}
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// Does the predicted length match final packed length?
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func TestMsgCompressLength(t *testing.T) {
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makeMsg := func(question string, ans, ns, e []RR) *Msg {
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msg := new(Msg)
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msg.SetQuestion(Fqdn(question), TypeANY)
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msg.Answer = append(msg.Answer, ans...)
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msg.Ns = append(msg.Ns, ns...)
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msg.Extra = append(msg.Extra, e...)
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msg.Compress = true
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return msg
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}
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name1 := "12345678901234567890123456789012345.12345678.123."
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rrA := testRR(name1 + " 3600 IN A 192.0.2.1")
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rrMx := testRR(name1 + " 3600 IN MX 10 " + name1)
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tests := []*Msg{
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makeMsg(name1, []RR{rrA}, nil, nil),
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makeMsg(name1, []RR{rrMx, rrMx}, nil, nil)}
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for _, msg := range tests {
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predicted := msg.Len()
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buf, err := msg.Pack()
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if err != nil {
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t.Error(err)
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}
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if predicted < len(buf) {
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t.Errorf("predicted compressed length is wrong: predicted %s (len=%d) %d, actual %d",
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msg.Question[0].Name, len(msg.Answer), predicted, len(buf))
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}
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}
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}
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func TestMsgLength(t *testing.T) {
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makeMsg := func(question string, ans, ns, e []RR) *Msg {
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msg := new(Msg)
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msg.SetQuestion(Fqdn(question), TypeANY)
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msg.Answer = append(msg.Answer, ans...)
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msg.Ns = append(msg.Ns, ns...)
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msg.Extra = append(msg.Extra, e...)
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return msg
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}
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name1 := "12345678901234567890123456789012345.12345678.123."
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rrA := testRR(name1 + " 3600 IN A 192.0.2.1")
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rrMx := testRR(name1 + " 3600 IN MX 10 " + name1)
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tests := []*Msg{
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makeMsg(name1, []RR{rrA}, nil, nil),
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makeMsg(name1, []RR{rrMx, rrMx}, nil, nil)}
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for _, msg := range tests {
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predicted := msg.Len()
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buf, err := msg.Pack()
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if err != nil {
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t.Error(err)
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}
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if predicted < len(buf) {
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t.Errorf("predicted length is wrong: predicted %s (len=%d), actual %d",
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msg.Question[0].Name, predicted, len(buf))
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}
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}
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}
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func TestMsgLength2(t *testing.T) {
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// Serialized replies
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var testMessages = []string{
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// google.com. IN A?
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"064e81800001000b0004000506676f6f676c6503636f6d0000010001c00c00010001000000050004adc22986c00c00010001000000050004adc22987c00c00010001000000050004adc22988c00c00010001000000050004adc22989c00c00010001000000050004adc2298ec00c00010001000000050004adc22980c00c00010001000000050004adc22981c00c00010001000000050004adc22982c00c00010001000000050004adc22983c00c00010001000000050004adc22984c00c00010001000000050004adc22985c00c00020001000000050006036e7331c00cc00c00020001000000050006036e7332c00cc00c00020001000000050006036e7333c00cc00c00020001000000050006036e7334c00cc0d800010001000000050004d8ef200ac0ea00010001000000050004d8ef220ac0fc00010001000000050004d8ef240ac10e00010001000000050004d8ef260a0000290500000000050000",
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// amazon.com. IN A? (reply has no EDNS0 record)
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// TODO(miek): this one is off-by-one, need to find out why
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//"6de1818000010004000a000806616d617a6f6e03636f6d0000010001c00c000100010000000500044815c2d4c00c000100010000000500044815d7e8c00c00010001000000050004b02062a6c00c00010001000000050004cdfbf236c00c000200010000000500140570646e733408756c747261646e73036f726700c00c000200010000000500150570646e733508756c747261646e7304696e666f00c00c000200010000000500160570646e733608756c747261646e7302636f02756b00c00c00020001000000050014036e7331037033310664796e656374036e657400c00c00020001000000050006036e7332c0cfc00c00020001000000050006036e7333c0cfc00c00020001000000050006036e7334c0cfc00c000200010000000500110570646e733108756c747261646e73c0dac00c000200010000000500080570646e7332c127c00c000200010000000500080570646e7333c06ec0cb00010001000000050004d04e461fc0eb00010001000000050004cc0dfa1fc0fd00010001000000050004d04e471fc10f00010001000000050004cc0dfb1fc12100010001000000050004cc4a6c01c121001c000100000005001020010502f3ff00000000000000000001c13e00010001000000050004cc4a6d01c13e001c0001000000050010261000a1101400000000000000000001",
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// yahoo.com. IN A?
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"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",
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// microsoft.com. IN A?
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"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",
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// google.com. IN MX?
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"724b8180000100050004000b06676f6f676c6503636f6d00000f0001c00c000f000100000005000c000a056173706d78016cc00cc00c000f0001000000050009001404616c7431c02ac00c000f0001000000050009001e04616c7432c02ac00c000f0001000000050009002804616c7433c02ac00c000f0001000000050009003204616c7434c02ac00c00020001000000050006036e7332c00cc00c00020001000000050006036e7333c00cc00c00020001000000050006036e7334c00cc00c00020001000000050006036e7331c00cc02a00010001000000050004adc2421bc02a001c00010000000500102a00145040080c01000000000000001bc04200010001000000050004adc2461bc05700010001000000050004adc2451bc06c000100010000000500044a7d8f1bc081000100010000000500044a7d191bc0ca00010001000000050004d8ef200ac09400010001000000050004d8ef220ac0a600010001000000050004d8ef240ac0b800010001000000050004d8ef260a0000290500000000050000",
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// reddit.com. IN A?
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"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",
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}
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for i, hexData := range testMessages {
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// we won't fail the decoding of the hex
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input, _ := hex.DecodeString(hexData)
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m := new(Msg)
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m.Unpack(input)
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m.Compress = true
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lenComp := m.Len()
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b, _ := m.Pack()
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pacComp := len(b)
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m.Compress = false
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lenUnComp := m.Len()
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b, _ = m.Pack()
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pacUnComp := len(b)
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if pacComp+1 != lenComp {
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t.Errorf("msg.Len(compressed)=%d actual=%d for test %d", lenComp, pacComp, i)
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}
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if pacUnComp+1 != lenUnComp {
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t.Errorf("msg.Len(uncompressed)=%d actual=%d for test %d", lenUnComp, pacUnComp, i)
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}
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}
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}
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func TestMsgLengthCompressionMalformed(t *testing.T) {
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// SOA with empty hostmaster, which is illegal
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soa := &SOA{Hdr: RR_Header{Name: ".", Rrtype: TypeSOA, Class: ClassINET, Ttl: 12345},
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Ns: ".",
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Mbox: "",
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Serial: 0,
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Refresh: 28800,
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Retry: 7200,
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Expire: 604800,
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Minttl: 60}
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m := new(Msg)
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m.Compress = true
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m.Ns = []RR{soa}
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m.Len() // Should not crash.
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}
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func TestMsgCompressLength2(t *testing.T) {
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msg := new(Msg)
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msg.Compress = true
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msg.SetQuestion(Fqdn("bliep."), TypeANY)
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msg.Answer = append(msg.Answer, &SRV{Hdr: RR_Header{Name: "blaat.", Rrtype: 0x21, Class: 0x1, Ttl: 0x3c}, Port: 0x4c57, Target: "foo.bar."})
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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}})
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predicted := msg.Len()
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buf, err := msg.Pack()
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if err != nil {
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t.Error(err)
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}
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if predicted != len(buf) {
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t.Errorf("predicted compressed length is wrong: predicted %s (len=%d) %d, actual %d",
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msg.Question[0].Name, len(msg.Answer), predicted, len(buf))
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}
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}
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func TestToRFC3597(t *testing.T) {
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a := testRR("miek.nl. IN A 10.0.1.1")
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x := new(RFC3597)
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x.ToRFC3597(a)
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if x.String() != `miek.nl. 3600 CLASS1 TYPE1 \# 4 0a000101` {
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t.Errorf("string mismatch, got: %s", x)
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}
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b := testRR("miek.nl. IN MX 10 mx.miek.nl.")
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x.ToRFC3597(b)
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if x.String() != `miek.nl. 3600 CLASS1 TYPE15 \# 14 000a026d78046d69656b026e6c00` {
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t.Errorf("string mismatch, got: %s", x)
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}
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}
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func TestNoRdataPack(t *testing.T) {
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data := make([]byte, 1024)
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for typ, fn := range TypeToRR {
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r := fn()
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*r.Header() = RR_Header{Name: "miek.nl.", Rrtype: typ, Class: ClassINET, Ttl: 16}
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_, err := PackRR(r, data, 0, nil, false)
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if err != nil {
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t.Errorf("failed to pack RR with zero rdata: %s: %v", TypeToString[typ], err)
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}
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}
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}
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func TestNoRdataUnpack(t *testing.T) {
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data := make([]byte, 1024)
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for typ, fn := range TypeToRR {
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if typ == TypeSOA || typ == TypeTSIG {
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// SOA, TSIG will not be seen (like this) in dyn. updates?
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continue
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}
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r := fn()
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*r.Header() = RR_Header{Name: "miek.nl.", Rrtype: typ, Class: ClassINET, Ttl: 16}
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off, err := PackRR(r, data, 0, nil, false)
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if err != nil {
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// Should always works, TestNoDataPack should have caught this
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t.Errorf("failed to pack RR: %v", err)
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continue
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}
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if _, _, err := UnpackRR(data[:off], 0); err != nil {
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t.Errorf("failed to unpack RR with zero rdata: %s: %v", TypeToString[typ], err)
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}
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}
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}
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func TestRdataOverflow(t *testing.T) {
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rr := new(RFC3597)
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rr.Hdr.Name = "."
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rr.Hdr.Class = ClassINET
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rr.Hdr.Rrtype = 65280
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rr.Rdata = hex.EncodeToString(make([]byte, 0xFFFF))
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buf := make([]byte, 0xFFFF*2)
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if _, err := PackRR(rr, buf, 0, nil, false); err != nil {
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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
|
|
}
|
|
}
|
|
}
|