def parse_data(self):
rtnval = None
buf = ''.join([self.buf[x]
for x in range(0, self.header.length)])
crcval = calcCrc32(buf[: -4])
rst = struct.unpack('<I', bytearray(buf[-4:]))
if (crcval != rst[0]):
self.parserlogger.warning('Data field CRC32 failed. header={}'.format(self.header))
rtnval = (False, HEADER_LEN)
else:
# print 'CRC32[{}] {}'.format(base64.b16encode(buf[-4:]),
# str(self.crc32.crcValue == rst[0]))
raw_buf = buf[HEADER_LEN: self.header.length - 4]
if self.header.enc:
raw_buf = decodeAES(raw_buf)[: -self.header.pad]
#### TODO debug ####
if self.header.ack:
self.parserlogger.debug(self.header)
####################
self.output_msg_queue.put((self.header, raw_buf), timeout=10.0)
rtnval = (True, self.header.length)
return rtnval
def parse_data(self):
rtnval = None
buf = ''.join([self.buf[x]
for x in range(0, self.header.length)])
crcval = calcCrc32(buf[: -4])
rst = struct.unpack('<I', bytearray(buf[-4:]))
if (crcval != rst[0]):
self.parserlogger.warning('Data field CRC32 failed. header={}'.format(self.header))
rtnval = (False, HEADER_LEN)
else:
# print 'CRC32[{}] {}'.format(base64.b16encode(buf[-4:]),
# str(self.crc32.crcValue == rst[0]))
raw_buf = buf[HEADER_LEN: self.header.length - 4]
if self.header.enc:
raw_buf = decodeAES(raw_buf)[: -self.header.pad]
#### TODO debug ####
if self.header.ack:
self.parserlogger.debug(self.header)
####################
self.output_msg_queue.put((self.header, raw_buf), timeout=10.0)
rtnval = (True, self.header.length)
return rtnval
def pack(self):
header = ProtocolHeader()
self.head_buf = header.render(
data_length=len(self.data_buf),
session=self.session_id,
ack=0,
pad=self.pad,
enc=self.enc,
seq=self.seq,
)
self.header = header
raw_buf = ''.join([self.head_buf, self.data_buf])
crcval = calcCrc32(raw_buf)
crc_buf = struct.pack('<I', crcval)
return raw_buf + crc_buf
def pack(self):
header = ProtocolHeader()
self.head_buf = header.render(
data_length=len(self.data_buf),
session=self.session_id,
ack=0,
pad=self.pad,
enc=self.enc,
seq=self.seq,
)
self.header = header
raw_buf = ''.join([self.head_buf, self.data_buf])
crcval = calcCrc32(raw_buf)
crc_buf = struct.pack('<I', crcval)
return raw_buf + crc_buf
