[Bug 1213173] Re: Does not handle 802.1Q tagged frames correctly

[Karl-Heinz Pape]

Hello!
I've installed kernel 2.6.38-16-generic and still have the same error.
So is it really an issue with the kernel?

If it IS an issue with the kernel building a new version of libpcap and
tcpdump will not help.

So I might have to set up a System with 10.04 to verify...

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Title:
  Does not handle 802.1Q tagged frames correctly

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[Bug 1213173] Re: Does not handle 802.1Q tagged frames correctly

[Karl-Heinz Pape]

I've got the same bug.
Additional information:
If I use the vlan tag in the capture filter I only see frames with stacked 
vlans.
If I use vlan 1 I will only see frames with vöan 1 as the inner tag.
More:
The vlan information in the frame I capture is at location ether[14,2].
If I filter on that location the frames are filtered at [18,2] although I did 
not
have any vlan in the capture filter string.
It seems that there is in implicit vlan tag in the capture filter. that 
produces an offset
within the frame if a (n outer) vlan is present!

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https://bugs.launchpad.net/bugs/1213173

Title:
  Does not handle 802.1Q tagged frames correctly

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https://bugs.launchpad.net/ubuntu/+source/libpcap/+bug/1213173/+subscriptions

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