How can I inject raw packets onto my network

Question

In testing certain network device driver receive features, I need to send special packets on the wire. I know I need to open a raw socket and push the bytes out. Is there some well-known example (C, perl, whatever) code already available for playing at this level?

(added later) I would prefer non-platform-specific answers, they'll be the most useful for everyone.

Answer 1

Look at the documentation for packet. Basically, you create a socket with SOCK_RAW or SOCK_DGRAM, then write to the socket using normal socket i/o. However, the data you send will be put directly on the line, rather than automatically getting the headers that are necessary for most network interop.

Answer 2

http://www.codeproject.com/KB/IP/sendrawpacket.aspx

There's already an existing project that may be able to help you with this.