I need to have a UDP server which allow me to receive/send informations from/to clients which dynamically will open a socket with a free port (so it will be differente from device and device). The client will send and receive in the same port, so the server must be able to communicate with it.
how could I set the server to stay open in every port? if I had 250 thousand users how could I handle them without tails problem and preventing the port to be occupied from another client?
I thought about open every port with different sockets in a different thread, but I don't know if this is a correct way.
A UDP Server can listen and be open on only one port. All clients can send data to that port. The server will have to handle each data and respond if needed to the peer who sent its data. This should happen even if more than one client wish to send data to server. In UDP context one client will not hog the server port.(Unless the application is badly written).