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CallX (Call eXtractor)

1. Overview
2. Running CallX
2.1 Compile and install Boost
2.2 Compile and install the GSM library
2.3 Compile and run CallX
3. License

##1. Overview CallX is an application for the extraction of signaling and media data in VoIP Networks. It comes with a built-in SIP signaling traffic analyzer to classify callers (behavioral analysis). The signaling-based analysis consists of the following 6 individual analyses:

  • Call Attempts
  • Call Completion
  • Call Duration Average
  • Call Duration Cumulative
  • Calls Closed by Callee
  • Calls Concurrent The classification (normal/suspicious) is based on configurable thresholds.

CallX can be configured to be used as a standalone application or in conjunction with the VIAT fingerprint generator FeatureX (Feature eXtractor). The media data can be exported to wave files (standalone application) or it can be sent over the network using the TCP protocol to another application (e.g. FeatureX). The export may be dependent (configurable) on the user classification (preselection). Depending on the hardware CallX should be able to process several hundred calls in parallel.

A data flow diagram of CallX is available here:

##2. Running CallX The source code should compile successful with GCC 4.7. It has been tested on Debian 7 (Wheezy) with GCC 4.7.2. To simplify this document, it is assumed that you are running a Debian 7 system. The prerequisites are some Boost libraries (system, date_time, filesystem, regex, log, chrono, thread) and the GSM library written by Jutta Degener and Carsten Bormann.

It follows a short installation guideline.

###2.1 Compile and install Boost Download Boost at (Version >= 1.54)

You will first have to install some Debian packages:

    sudo apt-get install build-essential python-dev libpcap0.8-dev libpqxx3-dev

There may be some more packages missing, depending on your system configuration.

    $ ./ --with-libraries=system,date_time,filesystem,regex,log,\
    chrono,thread --prefix=/usr/local --includedir=include --libdir=lib
    $ sudo ./b2 install --prefix=/usr/local/

###2.2 Compile and install the GSM library Download and extract the source code from (Version 1.0 patchlevel 13). You should read the files COPYRIGHT, README and INSTALL. It may be sufficient if you type:

    $ make
    $ mkdir /usr/local/include/gsm
    $ cp inc/* /usr/local/include/gsm
    $ cp lib/libgsm.a /usr/local/lib/

###2.3 Compile and run CallX Change the working directory to callx/Release and type

    $ make all

There is an config example (src/callx.cfg). You should edit this file before starting the application. CallX assumes that a config file named callx.cfg is located in the directory /etc/viat. You may specify another config file using the -c option.

You should now be able to start the application.

    $ ./callx [-c <config file>]

CallX needs the capability to set the device into promiscuous mode.

+++ Check the log file +++

It is possible to connect to the console port using a terminal program. Be careful if you enable the console. There are no special safety precautions other than the limitation to localhost.

In case of having serious trouble compiling/running CallX send an email to

##3. License 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

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