On Thu, Nov 13, 2003 at 07:41:51AM -0600, Casey Carter wrote: > The intuition here is to think about exactly what needs to be subtracted > from the whole-packet checksum to get the TCP checksum: the IP header > checksum. And the IP header checksum, since we know that it must be > correct, must be zero. Subtracting zero from a checksum leaves it > unchanged. Thus, the subtraction is implicit. > I'm enlightened! Thanks /npat -- Freedom, morality, and the human dignity of the individual consists precisely in this; that he does good not because he is forced to do so, but because he freely conceives it, wants it, and loves it. -- Mikhail Bakunin - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html