From: "francois donzet" <fdonzet@yahoo.fr>
To: linux-kernel@vger.kernel.org
Subject: checksum offloading
Date: Mon, 10 Nov 2003 12:29:33 +0100 (CET) [thread overview]
Message-ID: <20031110112933.52101.qmail@web25203.mail.ukl.yahoo.com> (raw)
Hi,
i have a little question :
When tcp checksum offloading is enabled, the chip
computes a sum on all words of the packet contents and
stores the result in skb->csum, setting skb->ip_summed
to CHECKSUM_HW. (see for example, e100_main.c)
Then, when packet reaches tcp layer, via
tcp_checksum_init(), tcp checksum is verified (using
together skb->csum and the pseudo header checksum).
How does TCP deal with skb->csum, as it doesn't cover
only the tcpheader+data (but ipheader+tcpheader+data)
Thanks.
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next reply other threads:[~2003-11-10 11:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-10 11:29 francois donzet [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-11-07 16:40 francois donzet
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