Re: [lwip-users] Assertion "pcb->snd_queuelen >= pbuf_clen(next->p)" failed after TCP handshake

[Tomas Mudrunka]

Can somebody please explain what exactly the assertion means?
I don't know where to start with investigation.

Assertion "pcb->snd_queuelen >= pbuf_clen(next->p)" FAILED


I tried to set CONFIG_FREERTOS_UNICORE=y to make sure it's not
caused by some data race between two cores, but it didn't helped.


Also here is screenshot from the WireShark if it does help:
https://i.imgur.com/tKSAkl0.png

192.168.48.10 is my Linux laptop
192.168.48.70 is ESP32 with LWIP running my netif driver

You can see the pings are working and TCP handshake starts,
but during the last received ACK the LWIP crashes and then
it's just retransmissions...


Dne 2021-04-21 11:46, Tomas Mudrunka napsal:
> Also i think it would be fair to mention that i use
> LWIP v2.1.2 as shipped with
> esp-idf v4.2 and unfortunately i don't have any option to 
> upgrade/downgrade it.

--
S pozdravem
Best regards
     Tomáš Mudruňka - SPOJE.NET s.r.o.