On Tue, Nov 8, 2011 at 1:26 AM, Denys Vlasenko <[email protected]> wrote:
> Hmm. Can you describe in detail what is in the packet which client sends
> to server in Solicit packet? What options (with nested suboptions)?
>
Sorry for delay, below is sample of solicit/reply dialog (all IP's are fake):
# tcpdump -i vlan2 -nnXXvv udp and port 547 or 546
vlan2: dev_set_promiscuity(master, 1)
device vlan2 entered promiscuous mode
tcpdump: listening on vlan2, link-type EN10MB (Ethernet), capture size
65535 bytes
03:03:34.154603 IP6 (hlim 64, next-header UDP (17) payload length: 74)
fe80::224:8cff:fe76:f361.546 > ff02::1:2.547: [udp sum ok] dhcp6
solicit (xid=66582f (client-ID hwaddr type 1 00248c76f361) (IA_PD
IAID:0 T1:0 T2:0) (rapid-commit) (elapsed-time 0) (option-request DNS)
(IA_NA IAID:0 T1:0 T2:0))
0x0000: 3333 0001 0002 0024 8c76 f361 86dd 6000 33.....$.v.a..`.
0x0010: 0000 004a 1140 fe80 0000 0000 0000 0224 ...J.@.........$
0x0020: 8cff fe76 f361 ff02 0000 0000 0000 0000 ...v.a..........
0x0030: 0000 0001 0002 0222 0223 004a a286 0166 .......".#.J...f
0x0040: 582f 0001 000a 0003 0001 0024 8c76 f361 X/.........$.v.a
0x0050: 0019 000c 0000 0000 0000 0000 0000 0000 ................
0x0060: 000e 0000 0008 0002 0000 0006 0002 0017 ................
0x0070: 0003 000c 0000 0000 0000 0000 0000 0000 ................
03:03:34.155027 IP6 (hlim 64, next-header UDP (17) payload length:
183) fe80::21e:8cff:fe5c:bce2.35609 > fe80::224:8cff:fe76:f361.546:
[udp sum ok] dhcp6 reply (xid=66582f (client-ID hwaddr type 1
00248c76f361) (server-ID hwaddr/time type 1 time 331551314
001e8c5cbc4c) (IA_NA IAID:0 T1:100 T2:160 (IA_ADDR
2001:470:28:10a::1006 pltime:200 vltime:1800)
(rapid-commit)[|dhcp6ext]) (rapid-commit) (SIP-servers-domain) (DNS
2001:470:28:10a::1) (IA_PD IAID:0 T1:100 T2:160 (IA_PD-prefix
2003:470:28:10a::/64 pltime:200 vltime:4294967295) (opt_0) (opt_0)
(opt_0)))
0x0000: 0024 8c76 f361 001e 8c5c bce2 86dd 6000 .$.v.a...\....`.
0x0010: 0000 00b7 1140 fe80 0000 0000 0000 021e .....@..........
0x0020: 8cff fe5c bce2 fe80 0000 0000 0000 0224 ...\...........$
0x0030: 8cff fe76 f361 8b19 0222 00b7 6b6c 0766 ...v.a..."..kl.f
0x0040: 582f 0001 000a 0003 0001 0024 8c76 f361 X/.........$.v.a
0x0050: 0002 000e 0001 0001 13c3 1252 001e 8c5c ...........R...\
0x0060: bc4c 0003 0028 0000 0000 0000 0064 0000 .L...(.......d..
0x0070: 00a0 0005 0018 2001 0470 0028 010a 0000 .........p.(....
0x0080: 0000 0000 1006 0000 00c8 0000 0708 000e ................
0x0090: 0000 0015 0016 0468 6f6d 6503 6e65 7400 .......home.net.
0x00a0: 0668 6f6d 6533 3603 6f72 6700 0017 0010 .home36.org.....
0x00b0: 2001 0470 0028 010a 0000 0000 0000 0001 ...p.(..........
0x00c0: 0019 0029 0000 0000 0000 0064 0000 00a0 ...).......d....
0x00d0: 001a 0019 0000 00c8 ffff ffff 4020 0304 ............@...
0x00e0: 7000 2801 0a00 0000 0000 0000 00 p.(..........
Leonid
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