Does not work zerotier

[imtrobin]

Hi, I'm trying WinIPBroadcast with zerotier (www.zerotier.com), and using Unreal/Unity games to test the LAN broadcast to find the games. It doesn't get to relayBroadcast, all filter out before hand.

I supposed they are using the same port to broadcast/receive, I see in the notes, that it wouldn't work in such case, but doesn't majority of LAN broadcast (for games) use the same port?

[dechamps]

You can use Wireshark to figure out where your packets are going and which ports they use. This might help shed some light on your issue.

[imtrobin]

Hi Etinenne, I have some time to test more. It does work when the ports are different. I use a seperate program to test. Wireshark shows the packet being relayed, good work!

Unfortunately, the games I'm trying is using the same ports. Can I ask where in the code this is being checked? I like to try disable it. Why would it not work for the when ports are the same?

[dechamps]

It is not checked anywhere in WinIPBroadcast, nor should it. Windows simply doesn't deliver such packets to the raw socket listening on the loopback interface, so WinIPBroadcast doesn't get to see them. I have no idea why - it's probably a quirk of the Windows network stack. Keep in mind this whole thing is a giant hack in the first place and relies on a weird undocumented behavior of raw sockets on Windows, so one can't really expect it to work reliably and consistently. Believe me, if I knew how to fix it, I would :)

Feel free to experiment and see if you can find a workaround. If you do, I would be happy to hear about it. You might also want to try one of the "alternatives" that are listed in the README.

[imtrobin]

I see. that's why I couldn't find it in the code! Thanks for the explanation.

[ThymoNL]

For TCP I was able to find this: https://superuser.com/questions/1088309/windows-10-nat-port-forwarding-ip-masquerade

Most games however use UDP to find servers and above doesn't (yet) work with UDP. I haven't found anything that can solve that.