def _decode_data(self, _data):
cursor = 0
self.id = MQTTUtils.decode_value(_data[cursor:cursor + 2])
cursor += 2
self.unsubscribe_list = []
while cursor < self.length:
topic, l = MQTTUtils.decode_string(_data[cursor:])
cursor += l + 2
self.unsubscribe_list.append(topic)
def _decode_data(self, _data):
self.topic, l = MQTTUtils.decode_string(_data)
cursor = l + 2
if self.qos > MQTTConstants.AT_MOST_ONCE:
self.id = MQTTUtils.decode_value(_data[cursor:cursor + 2])
cursor += 2
else:
self.id = None
self.payload = _data[cursor:]
def _decode_data(self, _data):
self.id = MQTTUtils.decode_value(_data[0:2])
cursor = 2
self.subscription_intents = []
while cursor < self.length:
topic, l = MQTTUtils.decode_string(_data[cursor:])
cursor += l + 2
qos = _data[cursor] & 0x03
cursor += 1
self.subscription_intents.append((topic, qos))
def _decode_data(self, _data):
self.protocol_name, l = MQTTUtils.decode_string(_data)
assert self.protocol_name == 'MQIsdp' or self.protocol_name == 'MQTT'
cursor = l + 2
self.protocol_version = _data[cursor]
assert self.protocol_version == 3 or self.protocol_version == 4
cursor += 1
self.has_username = (_data[cursor] & 0x80) == 0x80
self.has_passwd = (_data[cursor] & 0x40) == 0x40
self.will_retain = (_data[cursor] & 0x20) == 0x20
self.will_qos = (_data[cursor] & 0x18) >> 3
self.will_flag = (_data[cursor] & 0x04) == 0x04
self.clean_session = (_data[cursor] & 0x02) == 0x02
cursor += 1
self.keep_alive = MQTTUtils.decode_value(_data[cursor:cursor+2])
cursor += 2
self.client_uid, l = MQTTUtils.decode_string(_data[cursor:])
cursor += l
if self.will_flag:
cursor += 2
self.will_topic, l = MQTTUtils.decode_string(_data[cursor:])
cursor += l + 2
self.will_message, l = MQTTUtils.decode_string(_data[cursor:])
cursor += l
else:
self.will_topic = None
self.will_message = None
if self.has_username:
cursor += 2
self.username, l = MQTTUtils.decode_string(_data[cursor:])
cursor += l
else:
self.username = None
if self.has_passwd:
cursor += 2
if cursor < self.length - 2:
self.passwd, l = MQTTUtils.decode_string(_data[cursor:])
else:
self.passwd = None
else:
self.passwd = None