def build_publish_pkt(self, mid, topic, payload, qos, retain, dup):
"""Build PUBLISH packet."""
pkt = MqttPkt()
payloadlen = len(payload)
packetlen = 2 + len(topic) + payloadlen
if qos > 0:
packetlen += 2
pkt.mid = mid
pkt.command = NC.CMD_PUBLISH | ((dup & 0x1) << 3) | (qos << 1) | retain
pkt.remaining_length = packetlen
ret = pkt.alloc()
if ret != NC.ERR_SUCCESS:
return ret, None
#variable header : Topic String
pkt.write_string(topic)
if qos > 0:
pkt.write_uint16(mid)
#payloadlen
if payloadlen > 0:
pkt.write_bytes(payload, payloadlen)
return NC.ERR_SUCCESS, pkt
def build_publish_pkt(self, mid, topic, payload, qos, retain, dup):
"""Build PUBLISH packet."""
pkt = MqttPkt()
payloadlen = len(payload)
packetlen = 2 + len(topic) + payloadlen
if qos > 0:
packetlen += 2
pkt.mid = mid
pkt.command = NC.CMD_PUBLISH | ((dup & 0x1) << 3) | (qos << 1) | retain
pkt.remaining_length = packetlen
rc = pkt.alloc()
if rc != NC.ERR_SUCCESS:
return rc, None
#variable header : Topic String
pkt.write_string(topic, len(topic))
if qos > 0:
pkt.write_uint16(mid)
#payloadlen
if payloadlen > 0:
pkt.write_bytes(payload, payloadlen)
return NC.ERR_SUCCESS, pkt
def send_simple_command(self, cmd):
pkt = MqttPkt()
pkt.command = cmd
pkt.remaining_length = 0
rc = pkt.alloc()
if rc != NC.ERR_SUCCESS:
return rc
return self.packet_queue(pkt)
def send_simple_command(self, cmd):
"""Send simple mqtt commands."""
pkt = MqttPkt()
pkt.command = cmd
pkt.remaining_length = 0
ret = pkt.alloc()
if ret != NC.ERR_SUCCESS:
return ret
return self.packet_queue(pkt)
def send_simple_command(self, cmd):
"""Send simple mqtt commands."""
pkt = MqttPkt()
pkt.command = cmd
pkt.remaining_length = 0
ret = pkt.alloc()
if ret != NC.ERR_SUCCESS:
return ret
return self.packet_queue(pkt)
def pubcomp(self, mid):
"""Send PUBCOMP response to server."""
if self.sock == NC.INVALID_SOCKET:
return NC.ERR_NO_CONN
self.logger.info("Send PUBCOMP (msgid=%s)", mid)
pkt = MqttPkt()
pkt.command = NC.CMD_PUBCOMP
pkt.remaining_length = 2
ret = pkt.alloc()
if ret != NC.ERR_SUCCESS:
return ret
#variable header: acknowledged message id
pkt.write_uint16(mid)
return self.packet_queue(pkt)
def pubcomp(self, mid):
"""Send PUBCOMP response to server."""
if self.sock == NC.INVALID_SOCKET:
return NC.ERR_NO_CONN
self.logger.info("Send PUBCOMP (msgid=%s)", mid)
pkt = MqttPkt()
pkt.command = NC.CMD_PUBCOMP
pkt.remaining_length = 2
ret = pkt.alloc()
if ret != NC.ERR_SUCCESS:
return ret
#variable header: acknowledged message id
pkt.write_uint16(mid)
return self.packet_queue(pkt)
def send_unsubscribe(self, dup, topic):
"""Send unsubscribe COMMAND to server."""
pkt = MqttPkt()
pktlen = 2 + 2 + len(topic)
pkt.command = NC.CMD_UNSUBSCRIBE | (dup << 3) | (1 << 1)
pkt.remaining_length = pktlen
ret = pkt.alloc()
if ret != NC.ERR_SUCCESS:
return ret
#variable header
mid = self.mid_generate()
pkt.write_uint16(mid)
#payload
pkt.write_string(topic)
return self.packet_queue(pkt)
def send_unsubscribe(self, dup, topic):
"""Send unsubscribe COMMAND to server."""
pkt = MqttPkt()
pktlen = 2 + 2 + len(topic)
pkt.command = NC.CMD_UNSUBSCRIBE | (dup << 3) | (1 << 1)
pkt.remaining_length = pktlen
ret = pkt.alloc()
if ret != NC.ERR_SUCCESS:
return ret
#variable header
mid = self.mid_generate()
pkt.write_uint16(mid)
#payload
pkt.write_string(topic)
return self.packet_queue(pkt)