host = host or "127.0.0.1" port = port or 13 if arg then host = arg[1] or host port = arg[2] or port end host = toip(host) udp = udpsocket() print("Using host '" ..host.. "' and port " ..port.. "...") err = sendto(udp, "anything", host, port) if err then print(err) exit() end dgram, err = receive(udp) if not dgram then print(err) exit() end write(dgram)