Is anyone familiar with any free/open source software that can generate arbitrary volumes of valid but fake ethernet packets on a network? I'm working on an analysis system that uses pcap/tcpdump to sniff traffic, but there are logistical/policy issues about sniffing real networks. It'd be real sweet if the contents of those packets (balance of IP vs. other traffic, specific IP protocols/ports. etc.) were configurable to provide an interesting mix of traffic, but that's not essential at this point.

I assume you want a wrapper for libnet, but I stopped following libnet development around version 0.99

tbench, part of the dbench suite.

Cheers

Also, smbtorture, which is another (newer) component of the dbench suite.

Cheers

Heh, sounds like you should talk to Roger. He's just posted about how his product is making Cisco routers fall over.