RE: [lwip-users] Checksum Incorrect caused by Concatenation

[Hervé GARAT : Audemat]

Ok, this modification seems to be WRONG! But If I use the LWIP code "as is", 
when LWIP use pbuf_cat, the segment which is sent has checksum error.

So I would like to know if in yours applications, you are using this function 
and if the checksum is OK.
This checksum error is very exasperating because this message is never 
acknowledged and he's resent TCP_MAXRTX time.

The solutions that I found are to reduce this TCP_MAXRTX to 1 or to comment 
code part where the concatenation is doing. But it seems not to be good ideas.
I think there is a reason of this checksum error. 

Thanks for your Help