Seen when testing sending UDP packets from an XBee Cellular 3G unit to our loopback se

"Protocol cannot be None" when decoding RX IPv4 frame in escaped API mode about xbee-python HOT 1 CLOSED

digidotcom commented on August 20, 2024

"Protocol cannot be None" when decoding RX IPv4 frame in escaped API mode

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Comments (1)

mikewadsten commented on August 20, 2024

I think I found the cause. RXIPv4Packets.create_packet takes raw, unescapes it into _raw, but then reads every field except for the data out of raw (i.e. the escaped data).

After correcting this, I then got the following exception (note that line numbers may not match the master version identically, I added some print calls to my code):

Traceback (most recent call last):
  File "/home/mike/.envs/env/src/digi-xbee/digi/xbee/reader.py", line 325, in run
    self.__execute_user_callbacks(read_packet, remote)
  File "/home/mike/.envs/env/src/digi-xbee/digi/xbee/reader.py", line 610, in __execute_user_callbacks
    print(xbee_packet)
  File "/home/mike/.envs/env/src/digi-xbee/digi/xbee/packets/base.py", line 120, in __str__
    return str(self.to_dict())
  File "/home/mike/.envs/env/src/digi-xbee/digi/xbee/packets/base.py", line 161, in to_dict
    DictKeys.FRAME_SPEC_DATA: self._get_frame_spec_data_dict(),
  File "/home/mike/.envs/env/src/digi-xbee/digi/xbee/packets/base.py", line 333, in _get_frame_spec_data_dict
    DictKeys.API_DATA:   self._get_api_packet_spec_data_dict()}
  File "/home/mike/.envs/env/src/digi-xbee/digi/xbee/packets/network.py", line 246, in _get_api_packet_spec_data_dict
    DictKeys.DATA:          bytearray(self.__data)}
  File "/home/mike/.envs/env/lib/python3.6/enum.py", line 324, in __getattr__
    raise AttributeError(name) from None
AttributeError: DATA

which is because there is no DATA item in DictKeys. There is, however, RF_DATA.

I will submit a pull request with these fixes.

from xbee-python.

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