func upnp_setup():
	var upnp = UPNP.new()
	
	var discover_result = upnp.discover()
	assert(discover_result == UPNP.UPNP_RESULT_SUCCESS, \
		"UPNP Discover Failed! Error %s" % discover_result)

	assert(upnp.get_gateway() and upnp.get_gateway().is_valid_gateway(), \
		"UPNP Invalid Gateway!")

	var map_result = upnp.add_port_mapping(PORT)
	assert(map_result == UPNP.UPNP_RESULT_SUCCESS, \
		"UPNP Port Mapping Failed! Error %s" % map_result)
	
	print("Success! Join Address: %s" % upnp.query_external_address())