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

[David Bourgeois]

Follow-up Comment #2, bug #57734 (project lwip):

[comment #1 comment #1:]
> I can't find the code you mention in git head. Could you send a proposed
patch of how to fix this?

That has been changed in commit #2cc420e, at the bottom of this page: #2cc420e
<http://git.savannah.nongnu.org/cgit/lwip.git/commit/src/apps/mqtt/mqtt.c?id=2cc420e434744f9f217f2e68f39cf08379517a94>


-      pbuf_copy_partial(p, client->rx_buffer + cpy_start, cpy_len,
in_offset);
+      pbuf_copy_partial(p, client->rx_buffer + fixed_hdr_len, cpy_len,
in_offset);


I have not been able to grasp all the inner workings to patch it and there are
multiple changes after this commit for the zero-copy part. So it might be
better if I can reproduce the problem in master with a simple example.

What could I use as an example to reproduce this use case? We're using STM32
but the platform is irrelevant, so I better try with what are you using for
testing.

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