On Wed, Mar 07, 2001 at 10:47:06AM -0500, Louis A. Mamakos wrote:
>
> > To be CONSERVATIVE, the implementation MUST NOT transmit all-zero
> > computed TCP checksum as all-ones; while they are certainly equivalent
> > in one's complement arithmetics, but RFC 793 does not grant us to do
> > this co
> In two's complement arithmetics, yes. What matters here is how the
> the real checkers are implemented. For BSD-derived implementations,
> this does not matter. I don't know if others really exist. RFC 1624
> is pretty clear on this topic. The usual Internet principle is in place
> (from R
On Wed, Mar 07, 2001 at 09:58:32AM -0500, Louis A. Mamakos wrote:
> > On Wed, Mar 07, 2001 at 09:40:34AM -0500, Louis A. Mamakos wrote:
> > >
> > > > > So that the same logic applies to TCP packets as well. Currently, we
> > > > > can send a TCP packet with a checksum of 0, which is legal. Of p
> On Wed, Mar 07, 2001 at 09:40:34AM -0500, Louis A. Mamakos wrote:
> >
> > > > So that the same logic applies to TCP packets as well. Currently, we
> > > > can send a TCP packet with a checksum of 0, which is legal. Of possible
> > > > interest is that Linux doesn't do this; they alwyas send a
On Wed, Mar 07, 2001 at 09:40:34AM -0500, Louis A. Mamakos wrote:
>
> > > So that the same logic applies to TCP packets as well. Currently, we
> > > can send a TCP packet with a checksum of 0, which is legal. Of possible
> > > interest is that Linux doesn't do this; they alwyas send a non-zero
> > So that the same logic applies to TCP packets as well. Currently, we
> > can send a TCP packet with a checksum of 0, which is legal. Of possible
> > interest is that Linux doesn't do this; they alwyas send a non-zero
> > checksum in the TCP case, if a checksum was computed.
> >
> Hmm, but
On Thu, Nov 16, 2000 at 09:19:54AM -0600, Jonathan Lemon wrote:
> On Thu, Nov 16, 2000 at 12:09:36PM +0200, Ruslan Ermilov wrote:
> > Hi!
> >
> > RFC768> If the computed checksum is zero, it is transmitted as all ones
> > RFC768> (the equivalent in one's complement arithmetic). An all zero
> > R
