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Re: [lwip-users] lwIP UDP echo server fails to send message lengths of 4
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From: |
Sylvain Rochet |
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Subject: |
Re: [lwip-users] lwIP UDP echo server fails to send message lengths of 4385 & 4386 |
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Date: |
Fri, 3 Feb 2023 22:39:15 +0100 |
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User-agent: |
Mutt/1.5.23 (2014-03-12) |
Hi,
On Fri, Feb 03, 2023 at 01:24:48PM -0800, Dan Nygren wrote:
> Peter wrote:
>
> > 4385/4386 could be 3x MTU ? ...
>
> Peter, thanks for responding!
> Yes, it seems like I've hit some corner case.
> Is this the right place to notify the lwIP maintainers of problems? This is
> not a current problem for me as my messages are under the MTU size. I just
> hit this while developing some diagnostics for my board and I wanted to let
> others know about it.
This kind of issues set all red lights to full brightness about a low
level driver issue or a buggy MAC offloader on fragmented IP packets.
Anyway, basic rule about using fragmented IP packets: avoid (to not say
don't).
Sylvain
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