1 // Copyright 2012, Google, Inc. All rights reserved.
2 // Copyright 2009-2011 Andreas Krennmair. All rights reserved.
4 // Use of this source code is governed by a BSD-style license
5 // that can be found in the LICENSE file in the root of the source
14 "github.com/google/gopacket"
17 // testUDPPacketDNS is the packet:
18 // 10:33:07.883637 IP 172.16.255.1.53 > 172.29.20.15.35181: 47320 7/0/0 MX ALT2.ASPMX.L.GOOGLE.com. 20, MX ASPMX2.GOOGLEMAIL.com. 30, MX ASPMX3.GOOGLEMAIL.com. 30, MX ASPMX4.GOOGLEMAIL.com. 30, MX ASPMX5.GOOGLEMAIL.com. 30, MX ASPMX.L.GOOGLE.com. 10, MX ALT1.ASPMX.L.GOOGLE.com. 20 (202)
19 // 0x0000: 24be 0527 0b17 001f cab3 75c0 0800 4500 $..'......u...E.
20 // 0x0010: 00e6 68cf 0000 3f11 a6f9 ac10 ff01 ac1d ..h...?.........
21 // 0x0020: 140f 0035 896d 00d2 754a b8d8 8180 0001 ...5.m..uJ......
22 // 0x0030: 0007 0000 0000 0478 6b63 6403 636f 6d00 .......xkcd.com.
23 // 0x0040: 000f 0001 c00c 000f 0001 0000 0258 0018 .............X..
24 // 0x0050: 0014 0441 4c54 3205 4153 504d 5801 4c06 ...ALT2.ASPMX.L.
25 // 0x0060: 474f 4f47 4c45 c011 c00c 000f 0001 0000 GOOGLE..........
26 // 0x0070: 0258 0016 001e 0641 5350 4d58 320a 474f .X.....ASPMX2.GO
27 // 0x0080: 4f47 4c45 4d41 494c c011 c00c 000f 0001 OGLEMAIL........
28 // 0x0090: 0000 0258 000b 001e 0641 5350 4d58 33c0 ...X.....ASPMX3.
29 // 0x00a0: 53c0 0c00 0f00 0100 0002 5800 0b00 1e06 S.........X.....
30 // 0x00b0: 4153 504d 5834 c053 c00c 000f 0001 0000 ASPMX4.S........
31 // 0x00c0: 0258 000b 001e 0641 5350 4d58 35c0 53c0 .X.....ASPMX5.S.
32 // 0x00d0: 0c00 0f00 0100 0002 5800 0400 0ac0 2dc0 ........X.....-.
33 // 0x00e0: 0c00 0f00 0100 0002 5800 0900 1404 414c ........X.....AL
34 // 0x00f0: 5431 c02d T1.-
35 // Packet generated by doing DNS query for 'xkcd.com'
36 var testUDPPacketDNS = []byte{
37 0x24, 0xbe, 0x05, 0x27, 0x0b, 0x17, 0x00, 0x1f, 0xca, 0xb3, 0x75, 0xc0, 0x08, 0x00, 0x45, 0x00,
38 0x00, 0xe6, 0x68, 0xcf, 0x00, 0x00, 0x3f, 0x11, 0xa6, 0xf9, 0xac, 0x10, 0xff, 0x01, 0xac, 0x1d,
39 0x14, 0x0f, 0x00, 0x35, 0x89, 0x6d, 0x00, 0xd2, 0x75, 0x4a, 0xb8, 0xd8, 0x81, 0x80, 0x00, 0x01,
40 0x00, 0x07, 0x00, 0x00, 0x00, 0x00, 0x04, 0x78, 0x6b, 0x63, 0x64, 0x03, 0x63, 0x6f, 0x6d, 0x00,
41 0x00, 0x0f, 0x00, 0x01, 0xc0, 0x0c, 0x00, 0x0f, 0x00, 0x01, 0x00, 0x00, 0x02, 0x58, 0x00, 0x18,
42 0x00, 0x14, 0x04, 0x41, 0x4c, 0x54, 0x32, 0x05, 0x41, 0x53, 0x50, 0x4d, 0x58, 0x01, 0x4c, 0x06,
43 0x47, 0x4f, 0x4f, 0x47, 0x4c, 0x45, 0xc0, 0x11, 0xc0, 0x0c, 0x00, 0x0f, 0x00, 0x01, 0x00, 0x00,
44 0x02, 0x58, 0x00, 0x16, 0x00, 0x1e, 0x06, 0x41, 0x53, 0x50, 0x4d, 0x58, 0x32, 0x0a, 0x47, 0x4f,
45 0x4f, 0x47, 0x4c, 0x45, 0x4d, 0x41, 0x49, 0x4c, 0xc0, 0x11, 0xc0, 0x0c, 0x00, 0x0f, 0x00, 0x01,
46 0x00, 0x00, 0x02, 0x58, 0x00, 0x0b, 0x00, 0x1e, 0x06, 0x41, 0x53, 0x50, 0x4d, 0x58, 0x33, 0xc0,
47 0x53, 0xc0, 0x0c, 0x00, 0x0f, 0x00, 0x01, 0x00, 0x00, 0x02, 0x58, 0x00, 0x0b, 0x00, 0x1e, 0x06,
48 0x41, 0x53, 0x50, 0x4d, 0x58, 0x34, 0xc0, 0x53, 0xc0, 0x0c, 0x00, 0x0f, 0x00, 0x01, 0x00, 0x00,
49 0x02, 0x58, 0x00, 0x0b, 0x00, 0x1e, 0x06, 0x41, 0x53, 0x50, 0x4d, 0x58, 0x35, 0xc0, 0x53, 0xc0,
50 0x0c, 0x00, 0x0f, 0x00, 0x01, 0x00, 0x00, 0x02, 0x58, 0x00, 0x04, 0x00, 0x0a, 0xc0, 0x2d, 0xc0,
51 0x0c, 0x00, 0x0f, 0x00, 0x01, 0x00, 0x00, 0x02, 0x58, 0x00, 0x09, 0x00, 0x14, 0x04, 0x41, 0x4c,
52 0x54, 0x31, 0xc0, 0x2d,
55 func TestUDPPacketDNS(t *testing.T) {
56 p := gopacket.NewPacket(testUDPPacketDNS, LinkTypeEthernet, gopacket.Default)
57 if p.ErrorLayer() != nil {
58 t.Error("Failed to decode packet:", p.ErrorLayer().Error())
60 checkLayers(p, []gopacket.LayerType{LayerTypeEthernet, LayerTypeIPv4, LayerTypeUDP, LayerTypeDNS}, t)
61 if got, ok := p.TransportLayer().(*UDP); ok {
64 Contents: []byte{0x0, 0x35, 0x89, 0x6d, 0x0, 0xd2, 0x75, 0x4a},
65 Payload: []byte{0xb8, 0xd8, 0x81, 0x80, 0x0, 0x1, 0x0,
66 0x7, 0x0, 0x0, 0x0, 0x0, 0x4, 0x78, 0x6b, 0x63, 0x64, 0x3, 0x63, 0x6f,
67 0x6d, 0x0, 0x0, 0xf, 0x0, 0x1, 0xc0, 0xc, 0x0, 0xf, 0x0, 0x1, 0x0, 0x0,
68 0x2, 0x58, 0x0, 0x18, 0x0, 0x14, 0x4, 0x41, 0x4c, 0x54, 0x32, 0x5, 0x41,
69 0x53, 0x50, 0x4d, 0x58, 0x1, 0x4c, 0x6, 0x47, 0x4f, 0x4f, 0x47, 0x4c,
70 0x45, 0xc0, 0x11, 0xc0, 0xc, 0x0, 0xf, 0x0, 0x1, 0x0, 0x0, 0x2, 0x58, 0x0,
71 0x16, 0x0, 0x1e, 0x6, 0x41, 0x53, 0x50, 0x4d, 0x58, 0x32, 0xa, 0x47, 0x4f,
72 0x4f, 0x47, 0x4c, 0x45, 0x4d, 0x41, 0x49, 0x4c, 0xc0, 0x11, 0xc0, 0xc,
73 0x0, 0xf, 0x0, 0x1, 0x0, 0x0, 0x2, 0x58, 0x0, 0xb, 0x0, 0x1e, 0x6, 0x41,
74 0x53, 0x50, 0x4d, 0x58, 0x33, 0xc0, 0x53, 0xc0, 0xc, 0x0, 0xf, 0x0, 0x1,
75 0x0, 0x0, 0x2, 0x58, 0x0, 0xb, 0x0, 0x1e, 0x6, 0x41, 0x53, 0x50, 0x4d,
76 0x58, 0x34, 0xc0, 0x53, 0xc0, 0xc, 0x0, 0xf, 0x0, 0x1, 0x0, 0x0, 0x2,
77 0x58, 0x0, 0xb, 0x0, 0x1e, 0x6, 0x41, 0x53, 0x50, 0x4d, 0x58, 0x35, 0xc0,
78 0x53, 0xc0, 0xc, 0x0, 0xf, 0x0, 0x1, 0x0, 0x0, 0x2, 0x58, 0x0, 0x4, 0x0,
79 0xa, 0xc0, 0x2d, 0xc0, 0xc, 0x0, 0xf, 0x0, 0x1, 0x0, 0x0, 0x2, 0x58, 0x0,
80 0x9, 0x0, 0x14, 0x4, 0x41, 0x4c, 0x54, 0x31, 0xc0, 0x2d},
86 sPort: []byte{0x0, 0x35},
87 dPort: []byte{0x89, 0x6d},
89 if !reflect.DeepEqual(got, want) {
90 t.Errorf("UDP packet mismatch:\ngot :\n%#v\n\nwant :\n%#v\n\n", got, want)
93 t.Error("Transport layer packet not UDP")
97 func loadDNS(dnspacket []byte, t *testing.T) *DNS {
98 p := gopacket.NewPacket(dnspacket, LinkTypeEthernet, gopacket.Default)
99 if p.ErrorLayer() != nil {
100 t.Error("Failed to decode packet:", p.ErrorLayer().Error())
102 checkLayers(p, []gopacket.LayerType{LayerTypeEthernet, LayerTypeIPv4,
103 LayerTypeUDP, LayerTypeDNS}, t)
105 dnsL := p.Layer(LayerTypeDNS)
107 t.Error("No DNS Layer found")
110 dns, ok := dnsL.(*DNS)
117 var testDNSQueryA = []byte{
118 0xfe, 0x54, 0x00, 0x3e, 0x00, 0x96, 0x52, 0x54, /* .T.>..RT */
119 0x00, 0xbd, 0x1c, 0x70, 0x08, 0x00, 0x45, 0x00, /* ...p..E. */
120 0x00, 0x3c, 0x22, 0xe0, 0x00, 0x00, 0x40, 0x11, /* .<"...@. */
121 0xe2, 0x38, 0xc0, 0xa8, 0x7a, 0x46, 0xc0, 0xa8, /* .8..zF.. */
122 0x7a, 0x01, 0xc3, 0x35, 0x00, 0x35, 0x00, 0x28, /* z..5.5.( */
123 0x75, 0xd2, 0x52, 0x41, 0x01, 0x00, 0x00, 0x01, /* u.RA.... */
124 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x77, /* .......w */
125 0x77, 0x77, 0x06, 0x67, 0x6f, 0x6f, 0x67, 0x6c, /* ww.googl */
126 0x65, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x00, 0x01, /* e.com... */
130 func TestDNSQueryA(t *testing.T) {
131 dns := loadDNS(testDNSQueryA, t)
133 t.Fatal("Failed to get a pointer to DNS struct")
136 if uint16(len(dns.Questions)) != dns.QDCount {
137 t.Fatal("Invalid query decoding, not the right number of questions")
140 if string(dns.Questions[0].Name) != "www.google.com" {
141 t.Errorf("Invalid query decoding, expecting 'www.google.com', got '%s'",
142 dns.Questions[0].Name)
144 if dns.Questions[0].Class != DNSClassIN {
145 t.Errorf("Invalid query decoding, expecting Class IN, got '%d'",
146 dns.Questions[0].Class)
149 if dns.Questions[0].Type != DNSTypeA {
150 t.Errorf("Invalid query decoding, expecting Type A, got '%d'",
151 dns.Questions[0].Type)
155 var testDNSRRA = []byte{
156 0x52, 0x54, 0x00, 0xbd, 0x1c, 0x70, 0xfe, 0x54, /* RT...p.T */
157 0x00, 0x3e, 0x00, 0x96, 0x08, 0x00, 0x45, 0x00, /* .>....E. */
158 0x01, 0x24, 0x00, 0x00, 0x40, 0x00, 0x40, 0x11, /* .$..@.@. */
159 0xc4, 0x30, 0xc0, 0xa8, 0x7a, 0x01, 0xc0, 0xa8, /* .0..z... */
160 0x7a, 0x46, 0x00, 0x35, 0xc3, 0x35, 0x01, 0x10, /* zF.5.5.. */
161 0x76, 0xba, 0x52, 0x41, 0x81, 0x80, 0x00, 0x01, /* v.RA.... */
162 0x00, 0x06, 0x00, 0x04, 0x00, 0x04, 0x03, 0x77, /* .......w */
163 0x77, 0x77, 0x06, 0x67, 0x6f, 0x6f, 0x67, 0x6c, /* ww.googl */
164 0x65, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x00, 0x01, /* e.com... */
165 0x00, 0x01, 0xc0, 0x0c, 0x00, 0x01, 0x00, 0x01, /* ........ */
166 0x00, 0x00, 0x01, 0x2c, 0x00, 0x04, 0x4a, 0x7d, /* ...,..J} */
167 0xc3, 0x67, 0xc0, 0x0c, 0x00, 0x01, 0x00, 0x01, /* .g...... */
168 0x00, 0x00, 0x01, 0x2c, 0x00, 0x04, 0x4a, 0x7d, /* ...,..J} */
169 0xc3, 0x68, 0xc0, 0x0c, 0x00, 0x01, 0x00, 0x01, /* .h...... */
170 0x00, 0x00, 0x01, 0x2c, 0x00, 0x04, 0x4a, 0x7d, /* ...,..J} */
171 0xc3, 0x69, 0xc0, 0x0c, 0x00, 0x01, 0x00, 0x01, /* .i...... */
172 0x00, 0x00, 0x01, 0x2c, 0x00, 0x04, 0x4a, 0x7d, /* ...,..J} */
173 0xc3, 0x6a, 0xc0, 0x0c, 0x00, 0x01, 0x00, 0x01, /* .j...... */
174 0x00, 0x00, 0x01, 0x2c, 0x00, 0x04, 0x4a, 0x7d, /* ...,..J} */
175 0xc3, 0x93, 0xc0, 0x0c, 0x00, 0x01, 0x00, 0x01, /* ........ */
176 0x00, 0x00, 0x01, 0x2c, 0x00, 0x04, 0x4a, 0x7d, /* ...,..J} */
177 0xc3, 0x63, 0xc0, 0x10, 0x00, 0x02, 0x00, 0x01, /* .c...... */
178 0x00, 0x02, 0xa3, 0x00, 0x00, 0x06, 0x03, 0x6e, /* .......n */
179 0x73, 0x32, 0xc0, 0x10, 0xc0, 0x10, 0x00, 0x02, /* s2...... */
180 0x00, 0x01, 0x00, 0x02, 0xa3, 0x00, 0x00, 0x06, /* ........ */
181 0x03, 0x6e, 0x73, 0x33, 0xc0, 0x10, 0xc0, 0x10, /* .ns3.... */
182 0x00, 0x02, 0x00, 0x01, 0x00, 0x02, 0xa3, 0x00, /* ........ */
183 0x00, 0x06, 0x03, 0x6e, 0x73, 0x31, 0xc0, 0x10, /* ...ns1.. */
184 0xc0, 0x10, 0x00, 0x02, 0x00, 0x01, 0x00, 0x02, /* ........ */
185 0xa3, 0x00, 0x00, 0x06, 0x03, 0x6e, 0x73, 0x34, /* .....ns4 */
186 0xc0, 0x10, 0xc0, 0xb0, 0x00, 0x01, 0x00, 0x01, /* ........ */
187 0x00, 0x02, 0xa3, 0x00, 0x00, 0x04, 0xd8, 0xef, /* ........ */
188 0x20, 0x0a, 0xc0, 0x8c, 0x00, 0x01, 0x00, 0x01, /* ....... */
189 0x00, 0x02, 0xa3, 0x00, 0x00, 0x04, 0xd8, 0xef, /* ........ */
190 0x22, 0x0a, 0xc0, 0x9e, 0x00, 0x01, 0x00, 0x01, /* "....... */
191 0x00, 0x02, 0xa3, 0x00, 0x00, 0x04, 0xd8, 0xef, /* ........ */
192 0x24, 0x0a, 0xc0, 0xc2, 0x00, 0x01, 0x00, 0x01, /* $....... */
193 0x00, 0x02, 0xa3, 0x00, 0x00, 0x04, 0xd8, 0xef, /* ........ */
197 func TestDNSRRA(t *testing.T) {
198 dns := loadDNS(testDNSRRA, t)
200 t.Fatal("Failed to get a pointer to DNS struct")
204 if uint16(len(dns.Questions)) != dns.QDCount {
205 t.Fatal("Invalid query decoding, not the right number of questions")
206 } else if uint16(len(dns.Answers)) != dns.ANCount {
207 t.Fatal("Invalid query decoding, not the right number of answers")
208 } else if uint16(len(dns.Authorities)) != dns.NSCount {
209 t.Fatal("Invalid query decoding, not the right number of authorities")
210 } else if uint16(len(dns.Additionals)) != dns.ARCount {
211 t.Fatal("Invalid query decoding, not the right number of additionals info")
214 if string(dns.Questions[0].Name) != "www.google.com" {
215 t.Errorf("Invalid query decoding, expecting 'www.google.com', got '%s'",
216 dns.Questions[0].Name)
218 if string(dns.Answers[0].Name) != "www.google.com" {
219 t.Errorf("Invalid query decoding, expecting 'www.google.com', got '%d'",
220 dns.Questions[0].Class)
222 if dns.Answers[0].Class != DNSClassIN {
223 t.Errorf("Invalid query decoding, expecting Class IN, got '%d'",
224 dns.Questions[0].Class)
226 if dns.Answers[0].Type != DNSTypeA {
227 t.Errorf("Invalid query decoding, expecting Type A, got '%d'",
228 dns.Questions[0].Type)
230 if !dns.Answers[0].IP.Equal([]byte{74, 125, 195, 103}) {
231 t.Errorf("Invalid query decoding, invalid IP address,"+
232 " expecting '74.125.195.103', got '%s'",
233 dns.Answers[0].IP.String())
235 if len(dns.Answers) != 6 {
236 t.Errorf("No correct number of answers, expecting 6, go '%d'",
239 if len(dns.Authorities) != 4 {
240 t.Errorf("No correct number of answers, expecting 4, go '%d'",
243 if len(dns.Additionals) != 4 {
244 t.Errorf("No correct number of answers, expecting 4, go '%d'",
247 for i, want := range []string{
253 if got := string(dns.Additionals[i].Name); got != want {
254 t.Errorf("got %q want %q", got, want)
260 var testDNSAAAA = []byte{
261 0x52, 0x54, 0x00, 0xbd, 0x1c, 0x70, 0xfe, 0x54, /* RT...p.T */
262 0x00, 0x3e, 0x00, 0x96, 0x08, 0x00, 0x45, 0x00, /* .>....E. */
263 0x00, 0xe0, 0x00, 0x00, 0x40, 0x00, 0x40, 0x11, /* ....@.@. */
264 0xc4, 0x74, 0xc0, 0xa8, 0x7a, 0x01, 0xc0, 0xa8, /* .t..z... */
265 0x7a, 0x46, 0x00, 0x35, 0xdb, 0x13, 0x00, 0xcc, /* zF.5.... */
266 0x76, 0x76, 0xf3, 0x03, 0x81, 0x80, 0x00, 0x01, /* vv...... */
267 0x00, 0x01, 0x00, 0x04, 0x00, 0x04, 0x03, 0x77, /* .......w */
268 0x77, 0x77, 0x06, 0x67, 0x6f, 0x6f, 0x67, 0x6c, /* ww.googl */
269 0x65, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x00, 0x1c, /* e.com... */
270 0x00, 0x01, 0xc0, 0x0c, 0x00, 0x1c, 0x00, 0x01, /* ........ */
271 0x00, 0x00, 0x01, 0x2c, 0x00, 0x10, 0x2a, 0x00, /* ...,..*. */
272 0x14, 0x50, 0x40, 0x0c, 0x0c, 0x01, 0x00, 0x00, /* .P@..... */
273 0x00, 0x00, 0x00, 0x00, 0x00, 0x69, 0xc0, 0x10, /* .....i.. */
274 0x00, 0x02, 0x00, 0x01, 0x00, 0x02, 0xa3, 0x00, /* ........ */
275 0x00, 0x06, 0x03, 0x6e, 0x73, 0x34, 0xc0, 0x10, /* ...ns4.. */
276 0xc0, 0x10, 0x00, 0x02, 0x00, 0x01, 0x00, 0x02, /* ........ */
277 0xa3, 0x00, 0x00, 0x06, 0x03, 0x6e, 0x73, 0x32, /* .....ns2 */
278 0xc0, 0x10, 0xc0, 0x10, 0x00, 0x02, 0x00, 0x01, /* ........ */
279 0x00, 0x02, 0xa3, 0x00, 0x00, 0x06, 0x03, 0x6e, /* .......n */
280 0x73, 0x31, 0xc0, 0x10, 0xc0, 0x10, 0x00, 0x02, /* s1...... */
281 0x00, 0x01, 0x00, 0x02, 0xa3, 0x00, 0x00, 0x06, /* ........ */
282 0x03, 0x6e, 0x73, 0x33, 0xc0, 0x10, 0xc0, 0x6c, /* .ns3...l */
283 0x00, 0x01, 0x00, 0x01, 0x00, 0x02, 0xa3, 0x00, /* ........ */
284 0x00, 0x04, 0xd8, 0xef, 0x20, 0x0a, 0xc0, 0x5a, /* .... ..Z */
285 0x00, 0x01, 0x00, 0x01, 0x00, 0x02, 0xa3, 0x00, /* ........ */
286 0x00, 0x04, 0xd8, 0xef, 0x22, 0x0a, 0xc0, 0x7e, /* ...."..~ */
287 0x00, 0x01, 0x00, 0x01, 0x00, 0x02, 0xa3, 0x00, /* ........ */
288 0x00, 0x04, 0xd8, 0xef, 0x24, 0x0a, 0xc0, 0x48, /* ....$..H */
289 0x00, 0x01, 0x00, 0x01, 0x00, 0x02, 0xa3, 0x00, /* ........ */
290 0x00, 0x04, 0xd8, 0xef, 0x26, 0x0a, /* ....&. */
293 func TestDNSAAAA(t *testing.T) {
294 dns := loadDNS(testDNSAAAA, t)
296 t.Error("Failed to get a pointer to DNS struct")
300 if len(dns.Questions) != 1 {
301 t.Error("Invalid number of question")
304 if dns.Questions[0].Type != DNSTypeAAAA {
305 t.Errorf("Invalid question, Type is not AAAA, found %d",
306 dns.Questions[0].Type)
309 if len(dns.Answers) != 1 {
310 t.Error("Invalid number of answers")
312 if !dns.Answers[0].IP.Equal([]byte{0x2a, 0x00, 0x14, 0x50, 0x40,
313 0x0c, 0x0c, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x69}) {
314 t.Error("Invalid IP address, found ",
315 dns.Answers[0].IP.String())
319 var testDNSMXSOA = []byte{
320 0x52, 0x54, 0x00, 0xbd, 0x1c, 0x70, 0xfe, 0x54, /* RT...p.T */
321 0x00, 0x3e, 0x00, 0x96, 0x08, 0x00, 0x45, 0x00, /* .>....E. */
322 0x00, 0x6e, 0x00, 0x00, 0x40, 0x00, 0x40, 0x11, /* .n..@.@. */
323 0xc4, 0xe6, 0xc0, 0xa8, 0x7a, 0x01, 0xc0, 0xa8, /* ....z... */
324 0x7a, 0x46, 0x00, 0x35, 0x9c, 0x60, 0x00, 0x5a, /* zF.5.`.Z */
325 0x76, 0x04, 0xfc, 0x7a, 0x81, 0x80, 0x00, 0x01, /* v..z.... */
326 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x03, 0x77, /* .......w */
327 0x77, 0x77, 0x06, 0x67, 0x6f, 0x6f, 0x67, 0x6c, /* ww.googl */
328 0x65, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x00, 0x0f, /* e.com... */
329 0x00, 0x01, 0xc0, 0x10, 0x00, 0x06, 0x00, 0x01, /* ........ */
330 0x00, 0x00, 0x00, 0x3c, 0x00, 0x26, 0x03, 0x6e, /* ...<.&.n */
331 0x73, 0x31, 0xc0, 0x10, 0x09, 0x64, 0x6e, 0x73, /* s1...dns */
332 0x2d, 0x61, 0x64, 0x6d, 0x69, 0x6e, 0xc0, 0x10, /* -admin.. */
333 0x00, 0x17, 0x9f, 0x64, 0x00, 0x00, 0x1c, 0x20, /* ...d... */
334 0x00, 0x00, 0x07, 0x08, 0x00, 0x12, 0x75, 0x00, /* ......u. */
335 0x00, 0x00, 0x01, 0x2c, /* ..., */
338 func TestDNSMXSOA(t *testing.T) {
339 dns := loadDNS(testDNSMXSOA, t)
341 t.Error("Failed to get a pointer to DNS struct")
345 if len(dns.Authorities) != 1 {
346 t.Error("Invalid number of authoritative answers, found ",
347 len(dns.Authorities))
352 func BenchmarkDecodeDNS(b *testing.B) {
353 for i := 0; i < b.N; i++ {
354 gopacket.NewPacket(testDNSQueryA, LinkTypeEthernet, gopacket.NoCopy)
357 func BenchmarkDecodeDNSLayer(b *testing.B) {
359 for i := 0; i < b.N; i++ {
360 dns.DecodeFromBytes(testDNSAAAA[ /*eth*/ 14+ /*ipv4*/ 20+ /*udp*/ 8:], gopacket.NilDecodeFeedback)
363 func TestDNSDoesNotMalloc(t *testing.T) {
365 if n := testing.AllocsPerRun(1000, func() {
366 if err := dns.DecodeFromBytes(testDNSAAAA[ /*eth*/ 14+ /*ipv4*/ 20+ /*udp*/ 8:], gopacket.NilDecodeFeedback); err != nil {
370 t.Error(n, "mallocs decoding DNS")