From: Fabrice MARIE <fabrice@celestix.com>
To: "Shipman, Jeffrey E" <jeshipm@sandia.gov>,
"'linux-kernel@vger.kernel.org'" <linux-kernel@vger.kernel.org>
Subject: Re: TCP checksum?
Date: Fri, 14 Jun 2002 11:51:14 +0800 [thread overview]
Message-ID: <200206141151.14032.fabrice@celestix.com> (raw)
In-Reply-To: <03781128C7B74B4DBC27C55859C9D73809840636@es06snlnt>
Hello Jeffrey,
On Thursday 13 June 2002 23:10, Shipman, Jeffrey E wrote:
> I'm looking for a function similar to skb_checksum(), but
> for the tcphdr->check field. I'm playing around with a module
> I've written for netfilter and I would like to modify options of
> the IP and TCP headers. For example, right now I'm trying
> to set the destination IP to the source IP, but the TCP checksum
> is coming out incorrectly. How can I calculate this checksum?
> [...]
This functionallity is already provided by the ipt_MIRROR target.
If you want more info on netfilter module writting, read Rusty's
Netfilter Hacking HOWTO at :
http://www.netfilter.org/documentation/index.html#HOWTO
and if needed, post netfilter development questions on the
netfilter-devel mailing list, for more info :
http://www.netfilter.org/contact.html#devlist
Have a nice day,
Fabrice.
--
Fabrice MARIE
Senior R&D Engineer
Celestix Networks
http://www.celestix.com/
"Silly hacker, root is for administrators"
-Unknown
next prev parent reply other threads:[~2002-06-14 2:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-13 15:10 TCP checksum? Shipman, Jeffrey E
2002-06-13 15:28 ` Guillaume Morin
2002-06-13 15:34 ` Padraig Brady
2002-06-14 3:51 ` Fabrice MARIE [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-06-13 19:58 Shipman, Jeffrey E
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