[lwip-devel] [bug #57734] MQTT broken with muti-segments data

[Paul RATHGEB]

Follow-up Comment #7, bug #57734 (project lwip):

When data are segmented, mqtt_message_receive() (mqtt.c line 913 on master -
3f47b04f16a874c05def88dcda6b3e0a2d6684ce) fails. It returns -1 because it is a
short PUBLISH packet (mqtt.c line 729).

mqtt_parse_incoming don't support segmented data.

mqtt_message_received should probably not be called if msg_rem_len != 0. Also,
in case of segmented data, the length must be adapted when
mqtt_message_received is called.
It was the purpose of cpy_start up to the commit
        2cc420e434744f9f217f2e68f39cf08379517a94 it seems. Segmented data was OK
until then.

Also, commit df0699c143842e656176dfe65d89e183e697ef53 introduced another
problem by calling mqtt_message_received with incomplete data in the case of
multiple segments.

    _______________________________________________________

Reply to this item at:

  <https://savannah.nongnu.org/bugs/?57734>

_______________________________________________
  Message posté via Savannah
  https://savannah.nongnu.org/