On 6/6/2008 2:40 AM Mick said the following:
On Tuesday 03 June 2008, Drew Tomlinson wrote:
Ever since I upgraded my gentoo-sources kernel from 2.6.23 to 2.6.25, I
can no longer see packets on my wireless network for any device other
than my own. The tcpdump output looks like this:
20:49:32.909144 00:12:bf:2a:2c:76 (oui Unknown) Unknown SSAP 0x10 >
00:1f:32:5f:fe:06 (oui Unknown) Unknown DSAP 0xc2 Unnumbered, disc,
Flags [Final], length 44
20:49:32.912775 00:12:bf:2a:2c:76 (oui Unknown) Unknown SSAP 0x10 >
00:1f:32:5f:fe:06 (oui Unknown) Unknown DSAP 0xc2 Information, send seq
42, rcv seq 0, Flags [Response], length 204
20:49:32.916874 00:12:bf:2a:2c:76 (oui Unknown) Unknown SSAP 0x10 >
00:1f:32:5f:fe:06 (oui Unknown) Unknown DSAP 0xc2 Supervisory, Receiver
not Ready, rcv seq 0, Flags [Response], length 169
20:49:32.976738 00:12:bf:2a:2c:76 (oui Unknown) Unknown SSAP 0x10 >
00:1f:32:5f:fe:06 (oui Unknown) Unknown DSAP 0xc2 Information, send seq
43, rcv seq 0, Flags [Response], length 64
20:49:33.047570 00:12:bf:2a:2c:76 (oui Unknown) > 00:1f:32:5f:fe:06 (oui
Unknown), ethertype Unknown (0x05ec), length 1530:
0x0000: c211 5700 c393 1b7b 838f 366c 27c5 f97a ..W....{..6l'..z
0x0010: 5111 7d1a 1e33 bebd a432 ff30 5a35 e0ad Q.}..3...2.0Z5..
0x0020: ba16 2b31 f1e9 d905 5967 f333 d3a1 4ba3 ..+1....Yg.3..K.
0x0030: 1e32 0f18 fcc2
I've Googled for an answer and think that my problem is that I am unable
to decrypt WEP packets for any device other than my own. This is a
simple 64 bit WEP network in my home. Unfortunately I did not find
anything that applied to my situation.
One thing different about my new kernel config is that because I have a
Broadcom card, I moved to the new b43 driver instead of the old
b43_legacy driver. I am using version 4 firmware however I had the same
problem with version 3 firmware. I was hoping that would fix it but no
luck.
I am also using the new MAC80211 stack instead of the older IEEE80211
stack.
Any ideas on what I have done wrong?
How do you invoke tcpdump? Are you placing your interface in promiscuous
mode? If you iface is 00:12:bf:2a:2c:76 which one is 00:1f:32:5f:fe:06 ?
The router? Does setting -s 65535 provide more packet info?
As root:
tcpdump -i wlan0
My iface is 00:14:a5:fc:3b:b2 and is not shown in my log snippet. In
the log snippet, one MAC is my access point and the other is a Wii
gaming console.
Please note that this same command on this same network was just fine
when I was running kernel 2.6.23. Problems began when I upgraded to
kernel 2.6.25. Thus I suspect there is either some change with .25 or
more likely, I turned something on/off in my kernel config that I should
not have. I just don't know what that "something" might be.
Thanks for your reply.
Drew
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