def extract_payload_data(packet_info: cp.processing):
# print(packet_info.reduced_bytes)
if not packet_info.reduced_bytes.__len__() < 2:
# Extract client id
packet_info.client_identifier = cp.extract_string(packet_info)
if (not packet_info.reduced_bytes.__len__() < 2
) and packet_info.connect_flags.will_flag:
# Extract will topic
packet_info.will_topic = cp.extract_string(packet_info)
if (not packet_info.reduced_bytes.__len__() < 2
) and packet_info.connect_flags.will_flag:
# Extract will message
packet_info.will_message = cp.extract_string(packet_info)
if (not packet_info.reduced_bytes.__len__() < 2
) and packet_info.connect_flags.user_name:
# Extract user name
packet_info.user_name = cp.extract_string(packet_info)
if (not packet_info.reduced_bytes.__len__() < 2
) and packet_info.connect_flags.password:
# Extract password
packet_info.password = cp.extract_string(packet_info)
def extract_variable_header(packet_info: cp.processing):
if packet_info.reduced_bytes.__len__() < 2:
raise Exception("Topic name not found")
packet_info.published_topic = cp.extract_string(packet_info)
if (packet_info.qosLevel == 1) or (packet_info.qosLevel == 2):
packet_info.packet_identifier_msb = packet_info.pop_a_msb()
packet_info.packet_identifier_lsb = packet_info.pop_a_msb()
def extract_string(packet_info: cp.processing):
msb = packet_info.pop_a_msb()
lsb = packet_info.pop_a_msb()
string_length = (msb << 1) | lsb
ascii_list = []
for c in range(0, string_length):
ascii_list.append(packet_info.pop_a_msb())
return "".join(chr(i) for i in ascii_list)
def extract_payload_data(packet_info: cp.processing):
# print(packet_info.reduced_bytes)
len = packet_info.reduced_bytes.__len__()
while len != 0:
len -= 1
packet_info.published_message.append(packet_info.pop_a_msb())
def extract_payload_data(packet_info: cp.processing):
# print(packet_info.reduced_bytes)
while True:
topic_qos_pair = []
if packet_info.reduced_bytes.__len__() < 2:
return
topic_qos_pair.append(cp.extract_string(packet_info))
topic_qos_pair.append(packet_info.pop_a_msb())
packet_info.subscribed_topics.append(topic_qos_pair)
def extract_variable_header(packet_info: cp.processing):
iterations = 2
for index in range(0, iterations):
if packet_info.reduced_bytes.__len__() < iterations:
raise Exception(
"Error in packet size, can not get variable packet header "
)
byte = packet_info.reduced_bytes[0]
packet_info.pop_a_msb()
# print("byte:", byte)
if index == 0:
if byte != 0:
raise Exception("Invalid packet identifier 1")
packet_info.packet_identifier = ((byte & 255) << 8)
packet_info.packet_identifier_msb = byte
# FIXME : Paho request of subscribe doesnt' match documentation of MQTTv311 section 3.8.2.1, figure 3.21
# Documentation says the packet identifier lsb should be 10
# But the paho is sending the packet identifier lsb equal to 1
elif index == 1:
# if byte != 10:
# print(byte)
# raise Exception("Invalid packet identifier 2")
packet_info.packet_identifier = packet_info.packet_identifier | (
byte & 255)
# packet_info.packet_identifier_lsb = 10
packet_info.packet_identifier_lsb = byte
def extract_variable_header(packet_info: cp.processing):
iterations = 10
for index in range(0, iterations):
if packet_info.reduced_bytes.__len__() < iterations:
raise Exception(
"Error in packet size, can not get variable packet header "
)
byte = packet_info.reduced_bytes[0]
packet_info.pop_a_msb()
# print("byte:", byte)
if index == 0:
if byte != 0:
raise Exception("Invalid Protocol (a)")
elif index == 1:
if byte != 4:
raise Exception("Invalid Protocol2 (b)")
elif index == 2:
if byte != 77:
raise Exception("Invalid Protocol (c)")
elif index == 3:
if byte != 81:
raise Exception("Invalid Protocol (d)")
elif index == 4:
if byte != 84:
raise Exception("Invalid Protocol (e)")
elif index == 5:
if byte != 84:
raise Exception("Invalid Protocol (f)")
elif index == 6:
packet_info.protocol_level = byte
elif index == 7:
packet_info.connect_flags = cp.connect_flags(byte)
elif index == 8:
packet_info.keep_alive = (byte & 255) << 8
elif index == 9:
packet_info.keep_alive = packet_info.keep_alive | (byte & 255)
def extract_variable_header(packet_info: cp.processing):
iterations = 2
for index in range(0, iterations):
if packet_info.reduced_bytes.__len__() < iterations:
raise Exception(
"Error in packet size, can not get variable packet header "
)
byte = packet_info.reduced_bytes[0]
packet_info.pop_a_msb()
if index == 0:
if byte != 0:
raise Exception("Invalid packet identifier 1")
packet_info.packet_identifier = ((byte & 255) << 8)
packet_info.packet_identifier_msb = byte
elif index == 1:
packet_info.packet_identifier = packet_info.packet_identifier | (
byte & 255)
packet_info.packet_identifier_lsb = byte