From: Brad Campbell <brad@wasp.net.au>
To: Josan Kadett <corporate@superonline.com>
Cc: "'Chris Siebenmann'" <cks@utcc.utoronto.ca>,
linux-kernel@vger.kernel.org
Subject: Re: Entirely ignoring TCP and UDP checksum in kernel level
Date: Sun, 22 Aug 2004 10:01:20 +0400 [thread overview]
Message-ID: <412836B0.4010309@wasp.net.au> (raw)
In-Reply-To: <S264980AbUHVBIi/20040822010839Z+1297@vger.kernel.org>
Josan Kadett wrote:
> Well, the device fails only in one type of operation, that is when it has to
> receive packets from an internal port, it sends packets via its external IP
> address.
>
> I have managed to disable IP header checksumming by hacking the kernel (in
> file ip_input.c). Now I have to do the same for tcp_input.c and udp.c .
> Packet mangling will not be required because when I turn the rp_filter off,
> the kernel does not care whether it is coming from the intended source or
> not.
>
Just a completely random thought. What about re-calculating the checksum and correcting it when the
packet hits the IP layer prior to it being passed out to the relevant protocol handlers?
Regards,
Brad
next prev parent reply other threads:[~2004-08-22 6:01 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <04Aug21.205911edt.41960@gpu.utcc.utoronto.ca>
2004-08-22 2:08 ` Entirely ignoring TCP and UDP checksum in kernel level Josan Kadett
2004-08-22 6:01 ` Brad Campbell [this message]
2004-08-22 7:06 ` Josan Kadett
[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
2004-08-22 9:19 Brad Campbell
-- strict thread matches above, loose matches on Subject: below --
2004-08-22 6:17 Brad Campbell
2004-08-22 7:18 ` Josan Kadett
2004-08-22 7:24 ` Josan Kadett
2004-08-22 7:04 ` Brad Campbell
2004-08-22 8:12 ` Josan Kadett
2004-08-22 8:29 ` Brad Campbell
[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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