10 Sep
2015
10 Sep
'15
4:56 p.m.
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http://cgit.osmocom.org/osmo-pcap/commit/?id=b7a834b4cb6a0cdd53d4fb06c1981e…
commit b7a834b4cb6a0cdd53d4fb06c1981e8d2af1c949
Author: Holger Hans Peter Freyther <holger(a)moiji-mobile.com>
Date: Thu Sep 10 16:45:45 2015 +0200
gprs: Add a custom GPRS filter
Allow to inspect UDP messages and check for GPRS, NS, BSSGP
and then filter LLC frames. Parsing the vL datastructure with
the libpcap syntax is a pain. It could be done using BPF but
we do not want to use bpf asm to specify the entire ruleset.
I looked into using libepan/libwireshark but this has memory
issues and is painful too. So let's parse UDP, NS, BSSGP using
the info we already have. I tried a bit of editcap to generate
a bit of broken data. The length check might still be bad.
I used my crash_20100602.pcap file to count the LLC frames we
detect and compare that to wireshark it ended with the right
number.
pcap add-filter gprs
can be used to enable the new filtering option after the OS
has received the packet.
Fixes: ONW#1314
-----------------------------------------------------------------------
Summary of changes:
configure.ac | 1 +
include/osmo-pcap/osmo_pcap_client.h | 1 +
src/Makefile.am | 2 +-
src/osmo_client_core.c | 119 +++++++++++++++++++++++++++++++++++
src/osmo_client_vty.c | 23 +++++++
5 files changed, 145 insertions(+), 1 deletion(-)
hooks/post-receive
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Tools to centralize packet capture and storing