I have an application where I have potentially many processes must send a message to one process. I figured the most expedient way to do this would be to just send a UDP datagram.
When opening a socket, I need to specify which port to listen to. As I just want to fire and forget the UDP datagram, I’d like to just have the OS pick an available port. I’d rather not have to hunt for one, especially as many instances of my process may be running. Is there a way I can tell the OS to just pick an available port (or better yet, not even open a listening socket) to fire and forget my UDP datagram?
Yes. Specify 0 as the port. The OS will pick an available port for you.