Feature request: Add access to client udp port (UDP hole punching)

[motmot80]

Description

I need to know the client udp port which is randomly assigned to the socket, so I can use it to punch a UDP hole from the server to the client (f.e. Full-cone NAT).

SERVER:7777 =UDP-PUNCH=> CLIENT:<RANDOM>

Without access to the udp client port (socket port) I cannot punch these holes during the connection phase.

Feature request

Public method to access the assigned client udp port.

You did great work!

Thanks in advance and best regards, Thomas