Re: [lwip-users] Re: Checksum calculations

[Kieran Mansley]

On Thu, 2008-01-24 at 10:47 +0100, Goldschmidt Simon wrote:
> >On Thu, 2008-01-24 at 09:01 +0000, Kieran Mansley wrote:
> >> On Thu, 2008-01-24 at 02:06 +0530, Sourath Roy wrote:
> >> > Am I missing something here? 
> >> 
> >> If that is the case your application changing the data after it has 
> >> told lwIP to send it is the most likely cause.
> > 
> > Sorry - that was completely wrong.  If you application was changing
> > the data you would expect the retransmissions to get the correct
> > checksum when it is recalculated.
> 
> It would? I thoght checksums are calculated only when creating a fresh
> segment, not when moving this segment between the lists
> (unsent/unacked)?
> I think your previous statement made sense!

In that case ignore everything I said, apart from the bits that are
right!

Kieran