Hi,
trying to get everything ready for a little Duke3D LAN Party, we needed a way to quickly setup a simple file containing all the IP adresses for all the participating players. This due to the fact that the Linux Version of Duke3D has no support for auto discovery.
Realizing that this problem strives for a reusable solution, I created Tiny Discovery. I hacked this up on one day, so there might be some issues with this code, but it seems to work for now.
For instructions, what this tool does exactly, see the linked page.
Have fun
-Richard