def from_bytes(cls, payload):
payload_length, message_id, piece_index = unpack(
">IBI", payload[:cls.total_length])
if message_id != cls.message_id:
raise msgexcp.Message_Exception("Not a Have message")
return Have(piece_index)
def from_bytes(cls, payload):
payload_length, message_id, piece_index, block_offset, block_length = unpack(
">IBIII", payload[:cls.total_length])
if message_id != cls.message_id:
raise msgexcp.Message_Exception("Not a Cancel message")
return Cancel(piece_index, block_offset, block_length)
def from_bytes(cls, payload):
payload_length, message_id = unpack(">IB", payload[:cls.total_length])
if message_id != cls.message_id:
raise msgexcp.Message_Exception("Not an UnChoke message")
return UnChoke()
def from_bytes(cls, payload):
payload_length = unpack(">I", payload[:cls.total_length])
if payload_length != 0:
raise msgexcp.Message_Exception("Not a Keep Alive message")
return KeepAlive()
def from_bytes(cls, payload):
payload_length, message_id, listen_port = unpack(
">IBI", payload[:cls.total_length])
if message_id != cls.message_id:
raise msgexcp.Message_Exception("Not a Port message")
return Port(listen_port)
def from_bytes(cls, payload):
block_length = len(payload) - 13
payload_length, message_id, piece_index, block_offset, block = unpack(
">IBII{}s".format(block_length), payload[:13 + block_length])
if message_id != cls.message_id:
raise msgexcp.Message_Exception("Not a Piece message")
return Piece(block_length, piece_index, block_offset, block)
def dispatch(self):
try:
payload_length, message_id, = unpack(">IB", self.payload[:5])
except Exception as e:
logging.warning("Error when unpacking message : %s" % e.__str__())
return None
map_id_to_message = {
0: Choke,
1: UnChoke,
2: Interested,
3: NotInterested,
4: Have,
5: BitField,
6: Request,
7: Piece,
8: Cancel,
9: Port
}
if message_id not in list(map_id_to_message.keys()):
raise msgexcp.Message_Exception("Wrong message id")
return map_id_to_message[message_id].from_bytes(self.payload)
def from_bytes(cls, payload):
payload_length, message_id = unpack(">IB", payload[:cls.total_length])
if message_id != cls.message_id:
raise msgexcp.Message_Exception("Not a Non Interested message")
return Interested()