def from_bytes(data):
length = len(data)
if length == 0:
return KeepAliveMessage()
offset, type = Network.read_byte_as_int(data, 0)
if type == PeerMessageType.Piece: return PieceMessage.from_bytes(data)
if type == PeerMessageType.Choke: return ChokeMessage.from_bytes(data)
if type == PeerMessageType.Unchoke:
return UnchokeMessage.from_bytes(data)
if type == PeerMessageType.Interested:
return InterestedMessage.from_bytes(data)
if type == PeerMessageType.Uninterested:
return UninterestedMessage.from_bytes(data)
if type == PeerMessageType.Have: return HaveMessage.from_bytes(data)
if type == PeerMessageType.Bitfield:
return BitfieldMessage.from_bytes(data)
if type == PeerMessageType.Request:
return RequestMessage.from_bytes(data)
if type == PeerMessageType.Port: return PortMessage.from_bytes(data)
if type == PeerMessageType.Cancel:
return CancelMessage.from_bytes(data)
if type == PeerMessageType.HaveAll:
return HaveAllMessage.from_bytes(data)
if type == PeerMessageType.HaveNone:
return HaveNoneMessage.from_bytes(data)
if type == PeerMessageType.AllowedFast:
return AllowedFastMessage.from_bytes(data)
if type == PeerMessageType.SuggestPiece:
return SuggestPieceMessage.from_bytes(data)
if type == PeerMessageType.RejectRequest:
return RejectRequestMessage.from_bytes(data)
if type == PeerMessageType.ExtensionMessage:
offset, extension_message_type = Network.read_byte_as_int(
data, offset)
if extension_message_type == 0:
return ExtensionHandshakeMessage.from_bytes(data)
if extension_message_type == ExtensionProtocolMessageType.PeerExchange:
return PeerExchangeMessage.from_bytes(data)
if extension_message_type == ExtensionProtocolMessageType.Metadata:
return MetadataMessage.from_bytes(data)
Logger().write(LogVerbosity.Info,
"Unknown message! type = " + str(type))
def from_bytes(cls, data):
if not check_bytes_length(data, 68):
return None
offset = 0
offset, length = Network.read_byte_as_int(data, offset)
offset, protocol = Network.read_bytes(data, 19, offset)
offset, reserved = Network.read_bytes(data, 8, offset)
offset, info_hash = Network.read_bytes(data, 20, offset)
offset, peer_id = Network.read_bytes(data, 20, offset)
result = cls(info_hash)
result.length = length
result.protocol = protocol
result.reserved = reserved
result.peer_id = peer_id
return result