[lwip-devel] [bug #57452] CHECKSUM_ON_COPY leads to random bit error in TCP checksum

[Victor Brzeski]

Follow-up Comment #3, bug #57452 (project lwip):

Hello Simon,

I spent some time this week looking at this issue.
 - Very likely not an issue with the memcpy/csum routines
 - Likely not an issue my netif (I did make some improvements)
 - UDP checksum on copy works fine
 - Turning off all non-lwip macros doesn't aid the problem
 - Using lwIP's checksum on copy algorithm doesn't aid the problem

I may have come full circle with my work on this, but it doesn't seem to be
present with UDP from what I can tell so far.

I will try and dedicate a bit more time in the next few months to work on this
further, but I need to ignore the feature for now.



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