Date: Fri, 3 Feb 2006 15:07:03 +0300 From: Gleb Smirnoff <glebius@FreeBSD.org> To: kamal kc <kamal_ckk@yahoo.com> Cc: freebsd-net@FreeBSD.org Subject: Re: offloading ip checksum calculation to the NIC Message-ID: <20060203120703.GT60276@FreeBSD.org> In-Reply-To: <20060203103054.38501.qmail@web30007.mail.mud.yahoo.com> References: <20060203082021.GL60276@FreeBSD.org> <20060203103054.38501.qmail@web30007.mail.mud.yahoo.com>
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On Fri, Feb 03, 2006 at 02:30:54AM -0800, kamal kc wrote: k> so what do i need to do if i don't want to calculate k> the ip checksum myself ? k> k> right now i am taking off packet from the kernel k> and modifying some of the data content, and k> outputting to the IFQ_HANDOFF myself. and i k> am calculating the checksum myself. k> k> i guess if xl would support the k> hardware checksumming i could use that k> feature. k> k> i am just a beginner and i am not getting k> the clear picture. If interfaces has enabled capabilities for checksum offloading, then the kernel skips checksum calculation. See http://people.freebsd.org/~jlemon/csum.txt -- Totus tuus, Glebius. GLEBIUS-RIPN GLEB-RIPE
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