Tried using pypcap but it didn't seem to do anything and I am too lazy to compile python-libpcap.

Requires:
- pcapy python module (http://oss.coresecurity.com/projects/pcapy.html)
- impacket python module (http://oss.coresecurity.com/projects/impacket.html)
- pcap library, for Windows use WinPCap (http://www.winpcap.org/)

Sources:
- http://oss.coresecurity.com/pcapy/doc/pt01.html
- http://www.thescripts.com/forum/post2740081-5.html