The Corelatus Blog
E1/T1 and SDH/SONET telecommunications

Live Wireshark captures on Windows

Posted June 15th 2011

Update 23. January 2014: the -c switch is needed to force save_to_pcap to emit data in classic Pcap format, instead of Pcap-NG. Wireshark 1.10.5 doesn't allow Pcap-NG in pipes.

I've written about using Wireshark to look at signalling captured from an E1/T1 before. As of a few days ago, it's possible to do live captures on Windows, like this:

 save_to_pcap -c 1A 2A 16 \\.\pipe\ss7.1
 wireshark -k -i \\.\pipe\ss7.1

When you're capturing live, the SS7 packets appear in Wireshark in real-time.

The new version of 'save_to_pcap' program is part of the C examples, the .zip file contains both source (compiles on Unix and Windows) and .exe files.

It's always been possible to do live captures on Unix, you just pipe stdout:

./save_to_pcap -c gth21 1A 2A 16 - | wireshark -k -i -

Permalink | Tags: GTH, C, Windows, telecom-signalling, wireshark