def start_connecting(self):
print "Connecting to %s:%d" % self.address
self._is_connecting = True
self._socket_to_host = socketutils.new_udp_socket()
for i in xrange(ATTEMPT_COUNT):
# Send version to identify both our version and the local port of this connection
self._socket_to_host.sendto(dumps((self.protocol_version,
self.local_host.id,
self.local_host.name)), self.address)
# Receive hello as ack and to know the remote port of this particular connection
try:
socketutils.wait_for_read([self._socket_to_host], timeout=0.5)
except socketutils.TimeoutError:
pass
else:
request, remote_address = self._socket_to_host.recvfrom(MAX_PACKET_SIZE)
request_type, request_data = loads(request)
if request_type == 'NOTCONNECTING!':
raise ConnectionFailed("Other host has stopped connecting to us!")
assert request_type == 'WELCOME!', "Expected WELCOME, received %r" % (request_type,)
print "Received welcome response"
self._publicized_data, host_ids = request_data
# The welcome is sent from a different port (not the listening port)...
self._socket_to_host.connect(remote_address)
self._listener_socks = dict([(socketutils.udp_listener_on(0), (id, name))
for id, name in host_ids])
self._send_listening_on_ports()
break
else:
raise ConnectionFailed("Cannot connect to given host")
self.update = self._attempt_connecting
def start_connecting(self):
self._is_connecting = True
self._listener_sock = socketutils.udp_listener_on(self._port)
self._awaiting_connection = None
self._already_connected = []
self.update = self._attempt_listening
