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 = 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