kopia lustrzana https://github.com/Yakifo/amqtt
85 wiersze
2.7 KiB
Python
85 wiersze
2.7 KiB
Python
# Copyright (c) 2015 Nicolas JOUANIN
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#
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# See the file license.txt for copying permission.
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import asyncio
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from hbmqtt.mqtt.packet import CONNACK, MQTTPacket, MQTTFixedHeader, MQTTVariableHeader
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from hbmqtt.codecs import int_to_bytes, read_or_raise, bytes_to_int
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from hbmqtt.errors import HBMQTTException
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from hbmqtt.adapters import ReaderAdapter
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CONNECTION_ACCEPTED = 0x00
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UNACCEPTABLE_PROTOCOL_VERSION = 0x01
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IDENTIFIER_REJECTED = 0x02
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SERVER_UNAVAILABLE = 0x03
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BAD_USERNAME_PASSWORD = 0x04
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NOT_AUTHORIZED = 0x05
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class ConnackVariableHeader(MQTTVariableHeader):
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def __init__(self, session_parent=None, return_code=None):
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super().__init__()
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self.session_parent = session_parent
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self.return_code = return_code
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@classmethod
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@asyncio.coroutine
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def from_stream(cls, reader: ReaderAdapter, fixed_header: MQTTFixedHeader):
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data = yield from read_or_raise(reader, 2)
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session_parent = data[0] & 0x01
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return_code = bytes_to_int(data[1])
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return cls(session_parent, return_code)
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def to_bytes(self):
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out = bytearray(2)
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# Connect acknowledge flags
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if self.session_parent:
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out[0] = 1
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else:
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out[0] = 0
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# return code
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out[1] = self.return_code
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return out
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def __repr__(self):
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return type(self).__name__ + '(session_parent={0}, return_code={1})'\
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.format(hex(self.session_parent), hex(self.return_code))
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class ConnackPacket(MQTTPacket):
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VARIABLE_HEADER = ConnackVariableHeader
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PAYLOAD = None
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@property
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def return_code(self):
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return self.variable_header.return_code
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@return_code.setter
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def return_code(self, return_code):
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self.variable_header.return_code = return_code
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@property
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def session_parent(self):
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return self.variable_header.session_parent
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@session_parent.setter
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def session_parent(self, session_parent):
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self.variable_header.session_parent = session_parent
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def __init__(self, fixed: MQTTFixedHeader=None, variable_header: ConnackVariableHeader=None, payload=None):
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if fixed is None:
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header = MQTTFixedHeader(CONNACK, 0x00)
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else:
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if fixed.packet_type is not CONNACK:
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raise HBMQTTException("Invalid fixed packet type %s for ConnackPacket init" % fixed.packet_type)
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header = fixed
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super().__init__(header)
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self.variable_header = variable_header
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self.payload = None
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@classmethod
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def build(cls, session_parent=None, return_code=None):
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v_header = ConnackVariableHeader(session_parent, return_code)
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packet = ConnackPacket(variable_header=v_header)
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return packet
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