[lwip-users] lwIP UDP echo server fails to send message lengths of 4385 & 4386

[Peter]

4385/4386 could be 3x MTU ?

Not a lot surprises me, after spending many days on this

https://www.eevblog.com/forum/microcontrollers/anyone-here-familiar-with-lwip/msg4660942/#msg4660942

Peter



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>   1. lwIP UDP echo server fails to send message lengths of 4385 &
>      4386 (Dan Nygren)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Wed, 1 Feb 2023 14:10:10 -0800
>From: Dan Nygren <dan.nygren@gmail.com>
>To: lwip-users@nongnu.org
>Subject: [lwip-users] lwIP UDP echo server fails to send message
>       lengths of 4385 & 4386
>Message-ID:
>       <CAOX4OhwmKDE9vYUpk-FcDBz7Nxbj+zpb86vKo39_PeN81YwD9w@mail.gmail.com>
>Content-Type: text/plain; charset="utf-8"
>
>Hello fellow lwIP users. Can anyone point me in the right direction on how
>to resolve or report to the right folks the below issue?
>
>I'm seeing rather bizarre behavior in that messages of length 4385 and 4386
>I send to a lwIP based UDP echo server are not received back. udp_sendto()
>appears to be getting called and completing successfully. Wireshark
>indicates there are "bogus, payload length" errors with these lengths.
>
>I have a detailed write up showing the behavior here:
>https://github.com/Xilinx/embeddedsw/issues/212
>
>I can copy the info above into an email for this mailing list if you prefer.
>
>Let me know your suggestions on how to proceed. ...   Dan Nygren
>
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