Sender IP/Port for UDP Socket

Question

Is it possible to obtain the sender IP and (dynamically obtained) port with C sockets? I have the following:

memset(&hints, 0, sizeof hints); 
hints.ai_f         


        

Answer 1

Generally you get the local address/port information with the getsockname(2), but here you don't have it yet - the socket is not connected and nothing has been sent. If this is a simple UDP client - consider using connected UDP sockets - you'd be able to see local IP/port right after the connect(2).