sngrep

sngrep is a tool for displaying SIP calls message flows from terminal.

It supports live capture to display realtime SIP packets and can also be used as PCAP viewer.

Some screenshots of sngrep

Installing

Binaries

• Debian / Ubuntu
• CentOS / RedHat / Fedora
• Alpine Linux
• Gentoo
• Arch
• OSX
• OpenWRT/LEDE

Building from sources

Prerequisites

• glib2 - core library
• libncursesw5 - for UI, windows, panels.
• libpcap - for capturing packets.
• gnutls - (optional) for TLS transport decrypt using GnuTLS and libgcrypt
• libsnd - (optional) for saving RTP streams to wav files
• pulseaudio - (optional) for RTP stream player

Preparing source code

Use cmake to generate required makefiles to build the project

cmake .

All compiler flags are disabled by default, you can enable extra feature siw following flags

cmake flag	Feature
-DWITH_SSL=ON	Adds GnuTLS support to parse TLS captured messages (req. gnutls)
-DWITH_PULSE=ON	Adds Pulseaudio support for RTP playback (req. libpulse)
-DWITH_SND=ON	Adds libsnd support for RTP saving to wav (req. libsnd)
-DWITH_G729=ON	Adds G.729 support for saving and play streams (req. libbcg729)
-DUSE_IPV6=ON	Enable IPv6 packet capture support.
-DUSE_HEP=ON	Enable HEPv3 packet send/receive support.

Building and installing

cmake .
make install (as root)

You can find detailed instructions for some distributions on wiki.

Usage

See --help for a list of available flags and their syntax

For example, sngrep can be used to view SIP packets from a pcap file, also applying filters

sngrep -I file.pcap host 192.168.1.1 and port 5060

or live capturing, saving packets to a new file

sngrep -d eth0 -O save.pcap port 5060 and udp

Configuration

You can configure some options using sngreprc file

Frequent Asked Questions

Any feedback, request or question are welcomed at #sngrep channel at irc.freenode.net

See FAQ on Github Wiki

License

sngrep - SIP Messages flow viewer
Copyright (C) 2013-2019 Irontec S.L.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

In addition, as a special exception, the copyright holders give
permission to link the code of portions of this program with the
OpenSSL library under certain conditions as described in each
individual source file, and distribute linked combinations
including the two.
You must obey the GNU General Public License in all respects
for all of the code used other than OpenSSL.  If you modify
file(s) with this exception, you may extend this exception to your
version of the file(s), but you are not obligated to do so.  If you
do not wish to do so, delete this exception statement from your
version.  If you delete this exception statement from all source
files in the program, then also delete it here.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.