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Hanzhang ma cab7babbb1 update the folder organisation
2024-11-27 18:35:15 +01:00

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image-20241110210209022

root@pc1:~# tcpdump -i eth1
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on eth1, link-type EN10MB (Ethernet), snapshot length 262144 bytes
19:35:04.553056 IP6 fe80::216:3eff:fe00:2 > fe80::216:3eff:fe00:4: ICMP6, echo request, id 38058, seq 1, length 64
19:35:04.555038 IP6 fe80::216:3eff:fe00:4 > fe80::216:3eff:fe00:2: ICMP6, echo reply, id 38058, seq 1, length 64
19:35:05.554500 IP6 fe80::216:3eff:fe00:2 > fe80::216:3eff:fe00:4: ICMP6, echo request, id 38058, seq 2, length 64
19:35:05.555265 IP6 fe80::216:3eff:fe00:4 > fe80::216:3eff:fe00:2: ICMP6, echo reply, id 38058, seq 2, length 64
19:35:06.555772 IP6 fe80::216:3eff:fe00:2 > fe80::216:3eff:fe00:4: ICMP6, echo request, id 38058, seq 3, length 64
19:35:06.556673 IP6 fe80::216:3eff:fe00:4 > fe80::216:3eff:fe00:2: ICMP6, echo reply, id 38058, seq 3, length 64
19:35:07.557110 IP6 fe80::216:3eff:fe00:2 > fe80::216:3eff:fe00:4: ICMP6, echo request, id 38058, seq 4, length 64
19:35:07.557961 IP6 fe80::216:3eff:fe00:4 > fe80::216:3eff:fe00:2: ICMP6, echo reply, id 38058, seq 4, length 64
19:35:08.558528 IP6 fe80::216:3eff:fe00:2 > fe80::216:3eff:fe00:4: ICMP6, echo request, id 38058, seq 5, length 64
19:35:08.559256 IP6 fe80::216:3eff:fe00:4 > fe80::216:3eff:fe00:2: ICMP6, echo reply, id 38058, seq 5, length 64
19:35:08.722292 IP6 fe80::216:3eff:fe00:4 > fe80::216:3eff:fe00:2: ICMP6, echo request, id 10952, seq 1, length 64
19:35:08.722331 IP6 fe80::216:3eff:fe00:2 > fe80::216:3eff:fe00:4: ICMP6, echo reply, id 10952, seq 1, length 64
19:35:09.631016 IP6 fe80::216:3eff:fe00:4 > fe80::216:3eff:fe00:2: ICMP6, neighbor solicitation, who has fe80::216:3eff:fe00:2, length 32
19:35:09.631064 IP6 fe80::216:3eff:fe00:2 > fe80::216:3eff:fe00:4: ICMP6, neighbor advertisement, tgt is fe80::216:3eff:fe00:2, length 24
19:35:09.723566 IP6 fe80::216:3eff:fe00:4 > fe80::216:3eff:fe00:2: ICMP6, echo request, id 10952, seq 2, length 64
19:35:09.723596 IP6 fe80::216:3eff:fe00:2 > fe80::216:3eff:fe00:4: ICMP6, echo reply, id 10952, seq 2, length 64
19:35:10.724802 IP6 fe80::216:3eff:fe00:4 > fe80::216:3eff:fe00:2: ICMP6, echo request, id 10952, seq 3, length 64
19:35:10.724838 IP6 fe80::216:3eff:fe00:2 > fe80::216:3eff:fe00:4: ICMP6, echo reply, id 10952, seq 3, length 64
19:35:11.726031 IP6 fe80::216:3eff:fe00:4 > fe80::216:3eff:fe00:2: ICMP6, echo request, id 10952, seq 4, length 64
19:35:11.726064 IP6 fe80::216:3eff:fe00:2 > fe80::216:3eff:fe00:4: ICMP6, echo reply, id 10952, seq 4, length 64
19:35:12.727250 IP6 fe80::216:3eff:fe00:4 > fe80::216:3eff:fe00:2: ICMP6, echo request, id 10952, seq 5, length 64
19:35:12.727282 IP6 fe80::216:3eff:fe00:2 > fe80::216:3eff:fe00:4: ICMP6, echo reply, id 10952, seq 5, length 64

root@pc1:~# python3 208.py
Ether / fe80::216:3eff:fe00:2 > ff02::16 (0) / IPv6ExtHdrHopByHop / ICMPv6MLReport2
Ether / fe80::216:3eff:fe00:2 > ff02::16 (0) / IPv6ExtHdrHopByHop / ICMPv6MLReport2
Ether / fe80::216:3eff:fe00:4 > ff02::16 (0) / IPv6ExtHdrHopByHop / ICMPv6MLReport2
Ether / fe80::216:3eff:fe00:4 > ff02::16 (0) / IPv6ExtHdrHopByHop / ICMPv6MLReport2
Ether / IPv6 / ICMPv6 Echo Request (id: 0x3d3d seq: 0x1)
Ether / IPv6 / ICMPv6 Echo Reply (id: 0x3d3d seq: 0x1)
Ether / IPv6 / ICMPv6 Echo Request (id: 0x3d3d seq: 0x2)
Ether / IPv6 / ICMPv6 Echo Reply (id: 0x3d3d seq: 0x2)
Ether / IPv6 / ICMPv6 Echo Request (id: 0x3d3d seq: 0x3)
Ether / IPv6 / ICMPv6 Echo Reply (id: 0x3d3d seq: 0x3)
Ether / IPv6 / ICMPv6 Echo Request (id: 0x3d3d seq: 0x4)
Ether / IPv6 / ICMPv6 Echo Reply (id: 0x3d3d seq: 0x4)
Ether / IPv6 / ICMPv6 Echo Request (id: 0x3d3d seq: 0x5)
Ether / IPv6 / ICMPv6 Echo Reply (id: 0x3d3d seq: 0x5)
Ether / IPv6 / ICMPv6 Echo Request (id: 0x6b18 seq: 0x1)
Ether / IPv6 / ICMPv6 Echo Reply (id: 0x6b18 seq: 0x1)
Ether / IPv6 / ICMPv6 Echo Request (id: 0x6b18 seq: 0x2)
Ether / IPv6 / ICMPv6 Echo Reply (id: 0x6b18 seq: 0x2)
Ether / IPv6 / ICMPv6 Echo Request (id: 0x6b18 seq: 0x3)
Ether / IPv6 / ICMPv6 Echo Reply (id: 0x6b18 seq: 0x3)
Ether / IPv6 / ICMPv6 Echo Request (id: 0x6b18 seq: 0x4)                                                                                                                                                                                     Ether / IPv6 / ICMPv6 Echo Reply (id: 0x6b18 seq: 0x4)
Ether / IPv6 / ICMPv6 Echo Request (id: 0x6b18 seq: 0x5)
Ether / IPv6 / ICMPv6 Echo Reply (id: 0x6b18 seq: 0x5)

image-20241114215255732

image-20241114221022240

image-20241120144256948

buf :255 255 255 255 255 255 174 171 50 9 142 180 8 6 0 1 8 0 6 4 0 1 174 171 50 9 142 180 10 5 1 1 0 0 0 0 0 0 10 5 1 2 0 0 0 0 0 0 0 0 0 0 0 22 58 0 5 2 0 0 1 0 143 0 117 226 0 0 0 1 4 0 0 0 255 2 0 0 0 0 0 0 0 0 0 1 255 9 142 180 0 0 0 0 0 0 0 0 0 0 0 0 0 0 156 111 139 231 79 127 0 0 95 154 127 103 0 0 0 0 1 0 0 0 0 0 0 0 228 77 109 231 79 127 0 0 240 212 138 231 79 127 0 0 9 0 0 0 0 0 0 0 164 115 139 231 79 127 0 0 196 0 0 0 0 0 0 0 16 78 110 231 79 127 0 0 0 112 138 231 79 127 0 0 216 182 6 248 254 127 0 0 212 182 6 248 254 127 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 16 78 110 231 79 127 0 0 224 111 109 231 79 127 0 0 49 217 138 231 79 127 0 0 95 154 127 103 0 0 0 0 105 254 157 1 0 0 0 0 212 182 6 248 254 127 0 0 32 117 138 231 79 127 0 0 160 183 6 248 254 127 0 0 240 212 138 231 79 127 0 0 144 183 6 248 254 127 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 95 154 127 103 0 0 0 0 232 148 141 231 79 127 0 0 49 217 138 231 79 127 0 0 184 184 6 248 254 127 0 0 144 183 6 248 254 127 0 0 160 183 6 248 254 127 0 0 225 124 139 231 79 127 0 0 1 0 0 0 0 0 0 0 168 121 138 231 79 127 0 0 9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 232 137 141 231 79 127 0 0 48 151 141 231 79 127 0 0 168 121 138 231 79 127 0 0 232 137 141 231 79 127 0 0 0 0 0 0 1 0 0 0 232 148 141 231 79 127 0 0 0 0 0 0 0 0 0 0 216 210 10 248 254 127 0 0 184 209 10 248 254 127 0 0 255 255 255 255 0 0 0 0 83 143 48 104 0 0 0 0 64 130 109 231 79 127 0 0 0 112 138 231 79 127 0 0 88 151 141 231 79 127 0 0 176 184 6 248 254 127 0 0 192 185 6 248 254 127 0 0 3 0 0 0 0 0 0 0 208 184 6 248 254 127 0 0 100 223 139 231 79 127 0 0 217 118 141 231 79 127 0 0 80 223 138 231 79 127 0 0 48 185 6 248 254 127 0 0 7 0 0 0 0 0 0 0 7 0 0 0 8 0 0 0 240 212 138 231 79 127 0 0 232 137 141 231 79 127 0 0 77 146 139 231 79 127 0 0 0 0 0 0 0 0 0 0 216 160 139 231 79 127 0 0 128 184 6 248 254 127 0 0 200 197 110 231 79 127 0 0 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 185 6 248 254 127 0 0 0 0 0 0 0 0 0 0 0 185 6 248 254 127 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 96 215 138 231 79 127 0 0 232 148 141 231 79 127 0 0 132 217 138 231 79 127 0 0 48 212 138 231 79 127 0 0 72 128 141 231 79 127 0 0 0 208 138 231 79 127 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 64 130 109 231 79 127 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 186 183 144 108 127 166 0 0 3 232 138 108 127 166 0 0 128 145 141 231 79 127 0 0 128 145 141 231 79 127 0 0 232 70 140 231 79 127 0 0 208 187 6 248 254 127 0 0 31 27 139 231 79 127 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 64 133 138 231 79 127 0 0 128 144 141 231 79 127 0 0 0 0 0 0 0 0 0 0 1 189 6 248 254 127 0 0 1 151 141 231 79 127 0 0 232 137 141 231 79 127 0 0 184 185 6 248 254 127 0 0 3 232 138 108 127 166 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 24 210 10 248 254 127 0 0 0 0 0 0 32 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 246 117 174 3 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 230 207 6 248 254 127 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 194 0 0 0 0 0 0 0 215 187 6 248 254 127 0 0 149 84 245 242 222 85 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Read 42 bytes from device tap0

buf :FF FF FF FF FF FF AE AB 32 09 8E B4 08 06 00 01 08 00 06 04 00 01 AE AB 32 09 8E B4 0A 05 01 01 00 00 00 00 00 00 0A 05 01 02 00 00 00 00 00 00 00 00 00 00 00 16 3A 00 05 02 00 00 01 00 8F 00 75 E2 00 00 00 01 04 00 00 00 FF 02 00 00 00 00 00 00 00 00 00 01 FF 09 8E B4 00 00 00 00 00 00 00 00 00 00 00 00 00 00 9C CF 46 E5 67 7F 00 00 5F 9A 7F 67 00 00 00 00 01 00 00 00 00 00 00 00 E4 AD 28 E5 67 7F 00 00 F0 34 46 E5 67 7F 00 00 09 00 00 00 00 00 00 00 A4 D3 46 E5 67 7F 00 00 C4 00 00 00 00 00 00 00 10 AE 29 E5 67 7F 00 00 00 D0 45 E5 67 7F 00 00 88 E3 64 9A FE 7F 00 00 84 E3 64 9A FE 7F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10 AE 29 E5 67 7F 00 00 E0 CF 28 E5 67 7F 00 00 31 39 46 E5 67 7F 00 00 5F 9A 7F 67 00 00 00 00 69 FE 9D 01 00 00 00 00 84 E3 64 9A FE 7F 00 00 20 D5 45 E5 67 7F 00 00 50 E4 64 9A FE 7F 00 00 F0 34 46 E5 67 7F 00 00 40 E4 64 9A FE 7F 00 00 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 5F 9A 7F 67 00 00 00 00 E8 F4 48 E5 67 7F 00 00 31 39 46 E5 67 7F 00 00 68 E5 64 9A FE 7F 00 00 40 E4 64 9A FE 7F 00 00 50 E4 64 9A FE 7F 00 00 E1 DC 46 E5 67 7F 00 00 01 00 00 00 00 00 00 00 A8 D9 45 E5 67 7F 00 00 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 E8 E9 48 E5 67 7F 00 00 30 F7 48 E5 67 7F 00 00 A8 D9 45 E5 67 7F 00 00 E8 E9 48 E5 67 7F 00 00 00 00 00 00 01 00 00 00 E8 F4 48 E5 67 7F 00 00 00 00 00 00 00 00 00 00 D8 52 6F 9A FE 7F 00 00 B8 51 6F 9A FE 7F 00 00 FF FF FF FF 00 00 00 00 53 8F 30 68 00 00 00 00 40 E2 28 E5 67 7F 00 00 00 D0 45 E5 67 7F 00 00 58 F7 48 E5 67 7F 00 00 60 E5 64 9A FE 7F 00 00 70 E6 64 9A FE 7F 00 00 03 00 00 00 00 00 00 00 80 E5 64 9A FE 7F 00 00 64 3F 47 E5 67 7F 00 00 D9 D6 48 E5 67 7F 00 00 50 3F 46 E5 67 7F 00 00 E0 E5 64 9A FE 7F 00 00 07 00 00 00 00 00 00 00 07 00 00 00 08 00 00 00 F0 34 46 E5 67 7F 00 00 E8 E9 48 E5 67 7F 00 00 4D F2 46 E5 67 7F 00 00 00 00 00 00 00 00 00 00 D8 00 47 E5 67 7F 00 00 30 E5 64 9A FE 7F 00 00 C8 25 2A E5 67 7F 00 00 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 B0 E5 64 9A FE 7F 00 00 00 00 00 00 00 00 00 00 B0 E5 64 9A FE 7F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 60 37 46 E5 67 7F 00 00 E8 F4 48 E5 67 7F 00 00 84 39 46 E5 67 7F 00 00 30 34 46 E5 67 7F 00 00 48 E0 48 E5 67 7F 00 00 00 30 46 E5 67 7F 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 40 E2 28 E5 67 7F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 01 33 C8 BC BE A7 00 00 3F 90 B0 BC BE A7 00 00 80 F1 48 E5 67 7F 00 00 80 F1 48 E5 67 7F 00 00 E8 A6 47 E5 67 7F 00 00 80 E8 64 9A FE 7F 00 00 1F 7B 46 E5 67 7F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 40 E5 45 E5 67 7F 00 00 80 F0 48 E5 67 7F 00 00 00 00 00 00 00 00 00 00 01 EA 64 9A FE 7F 00 00 01 F7 48 E5 67 7F 00 00 E8 E9 48 E5 67 7F 00 00 68 E6 64 9A FE 7F 00 00 3F 90 B0 BC BE A7 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 18 52 6F 9A FE 7F 00 00 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 F6 75 AE 03 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 E6 EF 64 9A FE 7F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C2 00 00 00 00 00 00 00 87 E8 64 9A FE 7F 00 00 F5 64 7B 22 E1 55 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Read 42 bytes from device tap0

buf :FF FF FF FF FF FF AE AB 32 09 8E B4 08 06 00 01 08 00 06 04 00 01 AE AB 32 09 8E B4 0A 05 01 01 00 00 00 00 00 00 0A 05 01 02
Read 42 bytes from device tap0

buf :FF FF FF FF FF FF AE AB 32 09 8E B4 08 06 00 01 08 00 06 04 00 01 AE AB 32 09 8E B4 0A 05 01 01 00 00 00 00 00 00 0A 05 01 03
Read 42 bytes from device tap0

00:16:3e:00:00:04

52:5e:a1:8f:e3:6a

根据提供的 buf 内容，可以解析出这是一个 ARP 请求包。以下是详细的解析步骤。

1. ARP 数据包结构

ARP 请求包的基本结构如下：

字段名称 长度（字节） 说明
目标 MAC 地址 6 广播地址（FF:FF:FF:FF:FF:FF）
源 MAC 地址 6 发送方的 MAC 地址
上层协议类型 2 表示这是一个 ARP 包（值为 0x0806）
硬件类型 2 通常为以太网（值为 0x0001）
协议类型 2 表示 IP 协议（值为 0x0800）
硬件地址长度 1 MAC 地址的长度，通常为 6
协议地址长度 1 IP 地址的长度，通常为 4
操作码 2 0x0001 表示 ARP 请求，0x0002 表示 ARP 响应
发送方硬件地址（SHA） HLEN（6） 发送方的 MAC 地址
发送方协议地址（SPA） PLEN（4） 发送方的 IP 地址
目标硬件地址（THA） HLEN（6） 目标的 MAC 地址，ARP 请求中为全 0
目标协议地址（TPA） PLEN（4） 目标的 IP 地址

2. 提供的 buf 内容

原始数据：

FF FF FF FF FF FF AE AB 32 09 8E B4 08 06 00 01 08 00 06 04 00 01 AE AB 32 09 8E B4 0A 05 01 01 00 00 00 00 00 00 0A 05 01 02

分解字段：

偏移 字节范围 内容 解析说明
0 FF FF FF FF FF FF 目标 MAC 地址：广播地址 目标为全网广播
6 AE AB 32 09 8E B4 源 MAC 地址：AE:AB:32:09:8E:B4 PC2 的 tap0 MAC 地址
12 08 06 上层协议类型：ARP 包 (0x0806) 表示这是一个 ARP 包
14 00 01 硬件类型：以太网 (0x0001) 表示硬件类型为以太网
16 08 00 协议类型：IPv4 (0x0800) 表示要解析的协议为 IPv4
18 06 硬件地址长度（HLEN）：6 MAC 地址长度为 6 字节
19 04 协议地址长度（PLEN）：4 IP 地址长度为 4 字节
20 00 01 操作码（OPER）：请求 (0x0001) 表示这是一个 ARP 请求包
22 AE AB 32 09 8E B4 发送方硬件地址（SHA）：AE:AB:32:09:8E:B4 发送方 MAC 地址，来自 PC2 的 tap0 接口
28 0A 05 01 01 发送方协议地址（SPA）：10.5.1.1 发送方 IP 地址
32 00 00 00 00 00 00 目标硬件地址（THA）：00:00:00:00:00:00 目标 MAC 地址为空，全零（未解析）
38 0A 05 01 02 目标协议地址（TPA）：10.5.1.2 目标 IP 地址（PC1 的 tap0 接口的 IP 地址）

3. 分析说明

  • 目标 MAC 地址（广播）： 目标 MAC 地址是 FF:FF:FF:FF:FF:FF，表示这是一个广播包，发往子网内的所有设备。

  • 源 MAC 地址： 源 MAC 地址是 AE:AB:32:09:8E:B4，这对应 PC2 的 tap0 接口。

  • 操作类型（请求）： 操作码是 0x0001，表明这是一个 ARP 请求包。

  • 发送方 IP 地址和 MAC 地址： 发送方 IP 地址是 10.5.1.1，MAC 地址是 AE:AB:32:09:8E:B4。

  • 目标 IP 地址： 目标 IP 地址是 10.5.1.2，这对应 PC1 的 tap0 接口的 IP 地址。

  • 目标 MAC 地址为空： 因为这是一个 ARP 请求，目标的 MAC 地址尚未解析，所以此字段为全零。

4. 整体解析结果

PC1 的 tap0 接口收到的 buf 是一个 ARP 请求包，由 PC2 的 tap0 接口发送，目的是解析目标 IP 地址 10.5.1.2 对应的 MAC 地址。

PC1 的响应：

  • PC1 的 tap0 应该生成一个 ARP 响应包，包含以下信息：
    • 目标 MAC 地址：AE:AB:32:09:8E:B4（PC2 的 MAC 地址）。
    • 目标 IP 地址：10.5.1.1（PC2 的 IP 地址）。
    • 源 MAC 地址：PC1 的 tap0 的 MAC 地址。
    • 源 IP 地址：10.5.1.2（PC1 的 IP 地址）。

抓包工具验证

你可以使用 tcpdump 或 Wireshark 来验证 ARP 包的内容：

sudo tcpdump -i tap0 -vv arp

或者在 Wireshark 中直接查看 ARP 请求的详细信息，与上述解析进行对比。

image-20241120184425244

buf :FF FF FF FF FF FF AE AB 32 09 8E B4 08 06 00 01 08 00 06 04 00 01 AE AB 32 09 8E B4 0A 05 01 01 00 00 00 00 00 00 0A 05 01 02 00 00 00 00 00 00 00 00 00 00 00 00

======= image-20241119151751751

image-20241119153648360

root@pc1:~# tcpdump -i eth1 tcpdump: verbose output suppressed, use -v[v]... for full protocol decode listening on eth1, link-type EN10MB (Ethernet), snapshot length 262144 bytes 10:53:47.911087 IP6 2001:db8:5::2 > ff02::1:ff00:1: ICMP6, neighbor solicitation, who has 2001:db8:5::1, length 32 10:53:47.911189 IP6 2001:db8:5::1 > 2001:db8:5::2: ICMP6, neighbor advertisement, tgt is 2001:db8:5::1, length 32 10:53:47.912325 IP6 2001:db8:5::2 > 2001:db8:5::1: ICMP6, echo request, id 56760, seq 1, length 64 10:53:47.912349 IP6 2001:db8:5::1 > 2001:db8:5::2: ICMP6, echo reply, id 56760, seq 1, length 64 10:53:48.904692 IP6 2001:db8:5::2 > 2001:db8:5::1: ICMP6, echo request, id 56760, seq 2, length 64 10:53:48.904719 IP6 2001:db8:5::1 > 2001:db8:5::2: ICMP6, echo reply, id 56760, seq 2, length 64 10:53:49.906078 IP6 2001:db8:5::2 > 2001:db8:5::1: ICMP6, echo request, id 56760, seq 3, length 64 10:53:49.906103 IP6 2001:db8:5::1 > 2001:db8:5::2: ICMP6, echo reply, id 56760, seq 3, length 64 10:53:50.907512 IP6 2001:db8:5::2 > 2001:db8:5::1: ICMP6, echo request, id 56760, seq 4, length 64 10:53:50.907538 IP6 2001:db8:5::1 > 2001:db8:5::2: ICMP6, echo reply, id 56760, seq 4, length 64 10:53:51.908904 IP6 2001:db8:5::2 > 2001:db8:5::1: ICMP6, echo request, id 56760, seq 5, length 64 10:53:51.908929 IP6 2001:db8:5::1 > 2001:db8:5::2: ICMP6, echo reply, id 56760, seq 5, length 64 10:53:52.926411 IP6 fe80::216:3eff:fe00:2 > 2001:db8:5::2: ICMP6, neighbor solicitation, who has 2001:db8:5::2, length 32 10:53:52.927121 IP6 2001:db8:5::2 > fe80::216:3eff:fe00:2: ICMP6, neighbor advertisement, tgt is 2001:db8:5::2, length 24

13:14:32.958532 IP6 2001:db8:5::1 > 2001:db8:5::2: ICMP6, neighbor advertisement, tgt is 2001:db8:5::2, length 32 0x0000: 0016 3e00 0004 0016 3e00 0602 86dd 6000 ..>.....>...... 0x0010: 0000 0020 3aff 2001 0db8 0005 0000 0000 ....:........... 0x0020: 0000 0000 0001 2001 0db8 0005 0000 0000 ................ 0x0030: 0000 0000 0002 8800 484c 6000 0000 2001 ........HL..... 0x0040: 0db8 0005 0000 0000 0000 0000 0002 0201 ................ 0x0050: 0016 3e00 0602 ..>...

13:14:32.958532 IP6 2001:db8:5::1 > 2001:db8:5::2: ICMP6, neighbor advertisement, tgt is 2001:db8:5::2, length 32
        0x0000:  0016 3e00 0004 0016 3e00 0602 86dd 6000  ..>.....>.....`.
        0x0010:  0000 0020 3aff 2001 0db8 0005 0000 0000  ....:...........
        0x0020:  0000 0000 0001 2001 0db8 0005 0000 0000  ................
        0x0030:  0000 0000 0002 8800 484c 6000 0000 2001  ........HL`.....
        0x0040:  0db8 0005 0000 0000 0000 0000 0002 0201  ................
        0x0050:  0016 3e00 0602                           ..>...

00:16:3e:00:00:02

这个包是一个 ICMPv6 邻居通告（Neighbor Advertisement, NA） 消息，表明发送方（2001:db8:5::1）告知接收方（2001:db8:5::2），其目标地址（tgt）的链路层（MAC）信息。

以下是对这个包的逐字段详细分析：

1. 数据包的结构

ICMPv6 邻居通告消息由以下几部分组成：

字段 长度 解释
以太网帧头 14 字节 包括源 MAC 地址、目标 MAC 地址和以太网类型。
IPv6 头 40 字节 IPv6 源地址、目的地址，及与数据包相关的信息。
ICMPv6 头 4 字节 包括类型（Type）、代码（Code）、校验和（Checksum）。
ICMPv6 数据部分 可变长度 邻居通告消息的具体内容，包括目标地址和链路层地址选项。

2. 分析具体字段

以太网帧头

0x0000:  0016 3e00 0004 0016 3e00 0602 86dd
偏移量 字段 值 解释
0x0000 目标 MAC 地址 00:16:3e:00:00:04 目标设备的链路层地址（目的 MAC 地址）。
0x0006 源 MAC 地址 00:16:3e:00:06:02 源设备的链路层地址（发送方 MAC 地址）。
0x000c 以太网类型 0x86dd 表示接下来的数据是 IPv6 数据包。

IPv6 头部

0x0010:  6000 0000 0020 3aff 2001 0db8 0005 0000
0x0020:  0000 0000 0001 2001 0db8 0005 0000 0000
0x0030:  0000 0000 0002
偏移量 字段 值 解释
0x0010 版本/流量类/流标 6000 0000 IPv6 版本号（6），流量类别（0），流标（0）。
0x0014 载荷长度 0020 载荷长度 32 字节。
0x0016 下一头部类型 3a 表示下一头部为 ICMPv6（58）。
0x0017 跳数限制 ff 初始跳数设置为 255，避免跨链路转发。
0x0018 源地址 2001:db8:5::1 发送方 IPv6 地址。
0x0028 目的地址 2001:db8:5::2 接收方 IPv6 地址。

ICMPv6 头部

0x0030:  8800 484c
偏移量 字段 值 解释
0x0030 类型（Type） 88 表示这是一个邻居通告（Neighbor Advertisement）。
0x0031 代码（Code） 00 固定为 0（邻居通告无子代码）。
0x0032 校验和 484c 校验和，确保 ICMPv6 数据的完整性。

ICMPv6 数据部分

0x0034:  6000 0000 2001 0db8 0005 0000 0000 0000 0002
0x0050:  0201 0016 3e00 0602
(a) 邻居通告标志和目标地址
0x0034:  6000 0000 2001 0db8 0005 0000 0000 0000 0002
偏移量 字段 值 解释
0x0034 目标地址 2001:db8:5::2 目标设备的 IPv6 地址，告知请求方。
(b) 链路层地址选项
0x0050:  0201 0016 3e00 0602
偏移量 字段 值 解释
0x0050 选项类型 02 链路层地址选项（Target Link-Layer Address Option）。
0x0051 选项长度 01 长度为 1（单位：8 字节）。
0x0052 MAC 地址 00:16:3e:00:06:02 目标设备的链路层地址（MAC 地址）。

3. 总结这个包的含义

  1. 包类型：
    • 这是一个 ICMPv6 邻居通告（NA） 数据包。
  2. 发送方信息：
    • IPv6 地址：2001:db8:5::1。
    • MAC 地址：00:16:3e:00:06:02。
  3. 接收方信息：
    • 目标 IPv6 地址：2001:db8:5::2。
    • 目标链路层地址（MAC）：00:16:3e:00:04。
  4. 作用：
    • 通知目标设备（2001:db8:5::2），IPv6 地址 2001:db8:5::1 解析为 MAC 地址 00:16:3e:00:06:02。
  5. 网络流程：
    • 这是对之前邻居请求（NS）消息的回复，目标设备将更新其邻居表，以便后续通信。

补充

  • 邻居通告的用途：
    • 用于响应邻居请求。
    • 通知链路上的其他设备该地址的链路层信息。
  • 校验关键点：
    • 确认 IPv6 头部和 ICMPv6 数据是否正确匹配。
    • 确保链路层地址和目标地址一致。

如果你需要进一步分析或有其他问题，请随时补充！