[En-Nut-Discussion] IP Checksum calculation broken. Reenabled old algorithm for the meantime.

Nathan Moore nategoose at gmail.com
Mon Jun 18 15:45:47 CEST 2012

> I just discovered that the new IP checksum calculation which was
> introduced a few month ago is broken for some situations. I could not
> find a concrete reason so far, but I think it's an alignment question.

Years ago I was trying to squeeze performance out of Nut/OS on an
Atmega and fiddled with a gcc inline assembly checksum calculation
for it.  I'm sure that all targets could benefit from their own checksumming
routines for both performance and correctness (endian and alignment

This is a simple and often executed piece of code.


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