これを読むとよさげなツールなのですが、いかんせん使い方が難しそう・・・。
Scapy is a powerful interactive packet manipulation tool, packet generator,
network scanner, network discovery, packet sniffer, etc. It can for the moment
replace hping, 85% of nmap, arpspoof, arp-sk, arping, tcpdump, tethereal,
p0f, ....