pcapsipdump is an open-source libpcap-based SIP sniffer.

pcapsipdump is an open-source libpcap-based SIP sniffer.

pcapsipdump An open-source libpcap-based SIP sniffer. Listens on a network interface and saves SIP/RTP sessions to files. Each session goes in a separate, fancy-named .pcap file. Those could be opened with tcpdump, wireshark and friends.

pcapsipdump

Dependencies:
+ Subversion
+ make and gcc
+ libpcap-dev

Usage and install:

Source: http://pcapsipdump.sourceforge.net/