From: Brad Campbell <brad@wasp.net.au>
To: Josan Kadett <corporate@superonline.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Entirely ignoring TCP and UDP checksum in kernel level
Date: Sun, 22 Aug 2004 11:04:28 +0400 [thread overview]
Message-ID: <4128457C.7090001@wasp.net.au> (raw)
In-Reply-To: <S266258AbUHVGYp/20040822062445Z+1742@vger.kernel.org>
Josan Kadett wrote:
> **Indeed there is no longer such a need to recalculate the IP checksum
> because I have found a way to disable it by patching the kernel. So, only
> requirement is this;
>
> Change the source address of the packet before it reaches to the socket
> buffer aka skbuff.h. Because if it reaches that code with the wrong IP
> header, the csum will just drop it away.
The main reason I suggested correcting the checksum is if it was done that way, the kernel would
behave normally for all other IP traffic and simply do a dodgy on only traffic from 192.168.1.1
If nobody else jumps in, let me think about it for a day or so and I'll see what I can do. It's been
a couple of years since I last looked at the network code though.
What kernel are you running?
Regards,
Brad
next prev parent reply other threads:[~2004-08-22 7:03 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-22 6:17 Entirely ignoring TCP and UDP checksum in kernel level Brad Campbell
2004-08-22 7:18 ` Josan Kadett
2004-08-22 7:24 ` Josan Kadett
2004-08-22 7:04 ` Brad Campbell [this message]
2004-08-22 8:12 ` Josan Kadett
2004-08-22 8:29 ` Brad Campbell
[not found] <41285DB3.6070605@wasp.net.au>
2004-08-22 10:14 ` Josan Kadett
2004-08-22 11:48 ` James Courtier-Dutton
2004-08-22 10:25 ` Josan Kadett
2004-08-22 9:36 ` Brad Campbell
2004-08-22 10:48 ` Josan Kadett
2004-08-22 13:10 ` Brad Campbell
2004-08-22 13:13 ` Brad Campbell
2004-08-22 19:27 ` Josan Kadett
2004-08-22 20:28 ` Josan Kadett
2004-08-23 3:38 ` David Meybohm
2004-08-23 5:26 ` Josan Kadett
2004-08-23 8:40 ` Josan Kadett
-- strict thread matches above, loose matches on Subject: below --
2004-08-22 9:19 Brad Campbell
[not found] <04Aug21.205911edt.41960@gpu.utcc.utoronto.ca>
2004-08-22 2:08 ` Josan Kadett
2004-08-22 6:01 ` Brad Campbell
2004-08-22 7:06 ` Josan Kadett
[not found] <1093120934.854.155.camel@krustophenia.net>
2004-08-21 20:46 ` Lee Revell
2004-08-21 21:53 ` Josan Kadett
[not found] <4126FDD8.1090101@gmc.lt>
2004-08-21 9:00 ` Josan Kadett
2004-08-21 8:11 ` Denis Vlasenko
2004-08-21 9:18 ` Josan Kadett
2004-08-21 8:26 ` Lee Revell
2004-08-21 9:35 ` Josan Kadett
2004-08-21 9:14 ` Vojtech Pavlik
[not found] <1093078213.854.76.camel@krustophenia.net>
2004-08-21 8:58 ` Lee Revell
2004-08-21 21:41 ` Josan Kadett
2004-08-21 8:27 Denis Vlasenko
2004-08-21 8:41 ` Lee Revell
2004-08-21 9:50 ` Josan Kadett
2004-08-21 9:06 ` Kalin KOZHUHAROV
2004-08-21 21:46 ` Josan Kadett
2004-08-21 9:39 ` Josan Kadett
[not found] <4126F16D.1000507@gmc.lt>
2004-08-21 8:02 ` Josan Kadett
2004-08-21 7:36 ` Kalin KOZHUHAROV
2004-08-21 8:54 ` Josan Kadett
2004-08-21 6:15 Josan Kadett
2004-08-21 7:10 ` Willy Tarreau
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