Hi, I want to make a multiplayer game. For now people can only play each other using local connections. So they will be a menu/lobby where available local game rooms will be shown in a list. The trouble is I don't know how to make clients check whether there are any rooms in the local connection. Should the clients listen to the specified port (like my defined DEFAULT_PORT constant), IP (like 127.0.0.1), or what? I have searched about this lobby multiplayer mechanisms but I found nothing :(