# sngrep

sngrep is a tool for displaying SIP calls message flows.

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

## Prerequisites

 - libncurse5 - for UI , windows, panels.
 - libpcap - for capturing packets.

## Installing
 
On most systems the commands to build will be the standard atotools procedure: 

	./configure
	make
	make install (as root)

If you dont want to use libpcap (because is not available in your system or
don't want to install more development libraries), you can use release 0.0.0
available at https://github.com/irontec/sngrep/releases

## Usage

sngrep can be used to view SIP packets from a pcap file

    sngrep file.pcap

or live capturing

	sngrep port 5060 and udp

You can configure some options using a sngreprc file

## Frequent Asked Questions
 <dl>
  <dt>Why a new tool from network filtering?</dt>
  <dd>Don't know. I didn't find any console tool that will display call flows.</dd>
  <dt>Why dont you filter packages in online mode instead of using ngrep?</dt>
  <dd>You can actually capture disabling ngrep using only pcap filters (see Installing options above)</dd>
  <dt>Why only parsing SIP Messages?</dt>
  <dd>Because it's useful for us</dd>
  <dt>Extended Call flow window doesn't work</dt>
  <dd>If you want to make relations between different dialogs (extended callflow)
   a header must be present in of the dialogs referencing the other one.
   This header can be X-CID or X-Call-ID and must contain the Call-ID of the 
   other related dialog.</dd>
  <dt>I have found a bug, what should I do?</dt>
  <dd>There are LOTS of bugs. The strange thing will be you haven't found one.
   Just write an issue at github and I will try to fix it.</dd>
  <dt>I think the idea is better than the tool.</dt>
  <dd> I think that too. If you want to start a new tool with the same purpose
   send me an email, I'll want to contribute.</dd>
</dl>

## License 
    sngrep - SIP callflow viewer using ngrep
    Copyright (C) 2013 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.

    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/>.