bpf filtering for GTP-U

["Ambika Pr. Tripathy" <tripaam () nethawk fi>]

Hi,

I have a capture file having protocol stack as eth-II/ip/udp/gtp-u/ip/tcp/application.
And my ip filter expecting packets having ip address x.x.x.x over GTP-U.
But i found the filter "rc host x.x.x.x" only takes the IP header over eth-ii
layer for its filtering.

Is it possible to filter the IP over GTP using current BPF-syntax or any
tips to modify the codes for bpf so that it will work for gtp.

Ambika Prasad Tripathy

NetHawk Networks India Pvt. Ltd.
Mob: +91-94375 47730
mail: ambika.tripathy () nethawkgroup com
web: www.nethawk.fi


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