You need to install the pylibpcap library (Version 0.6.4 or greater) for this recipe to work. In Debian-based Linux systems, you may install it using the following command:

$ sudo apt-get install python-libpcap
  

It is also available at SourceForge (http://sourceforge.net/projects/pylibpcap/).

Python 3 may require you to install pypcap using pip instead:

$ sudo pip install pypcap  

You also need to install the construct library, which can be installed from PyPI via pip or easy_install, as shown in the following command:

$ easy_install construct