How to perform valid UDP bidirectional connection

[arziel12]

Hello, for some time i still facing the same issue, but for now i moved from local (which i fixed in past, and even my local wifi network), but for now i facing a mobile hotspot.

My issue is still the same, i can't create a valid bidirectional client-server udp communication.

The client is behind the NAT and makes traversing the ports, i know what the issue is.

There should be

• message from client to server
• client should listening on that port which used
• server should response messages to same port from which client send message

But the problem is i don't know on what port i should listen and also, if i try listen to same port which i bound for sender, it failed because is already in use.

Do i something wrong? It just seems for me I something missleading, cause this must be most trivial thing, which is for sure implemented somehow.

Can you please help me with some response, cause i just can't get it worked.

[ayumax]

Details are unknown because I am not used to communication beyond NAT. However, if NAT supports bidirectional translation, I don't think you need to know the private IP address and port.

[arziel12]

Client itself needed that information because he must start listen at that port. :)

[arziel12]

After some hours, i make it work with combination of getnamo's udp wrapper, which i use for perform udp hole punch. :]