Is there a system tool you can use? It's pretty easy to pipe data in Perl, so I imagine you could just feed it to a pipe to a command-line tool, or refer the tool to a file and then have the tool send it.

Perl does have some UDP/TCP functionality, so you can check if someone's made a library already to do a "you: sending filename and write settings" "reply: ready to receive" "you: $data"