RE: Entirely ignoring TCP and UDP checksum in kernel level

[Josan Kadett]

That is not much of an intelligible idea. A way to hack the kernel could be
found as I still presume. "Turn off checksums" but not by re-writing the
whole tcp code in the kernel. Isn't that possible ? Linux is an operating
system of infinite possibilities, right ? But only if you know how to hack
it...

-----Original Message-----
From: Denis Vlasenko [mailto:vda@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx] 
Sent: Saturday, August 21, 2004 10:11 AM
To: Josan Kadett; 'Aidas Kasparas'
Cc: linux-kernel@xxxxxxxxxxxxxxx
Subject: RE: Entirely ignoring TCP and UDP checksum in kernel level

On Saturday 21 August 2004 12:00, Josan Kadett wrote:
> The problem is that the interface 192.168.1.1 does not allow any
> tranmission to occur. An implementation error I think... We send packets
to
> 192.168.1.1, we get no reply, but when we send packets to 192.168.77.1 we
> get the replies (that is where the abnormality begins). However; the
> replies are now sourced from 192.168.1.1 instead. That is, the blasted
code
> in the device calculates the checksum using the wrong IP address which it
> thinks it is assigned to...

Maybe dust off some old Pentium 133 and replace that piece of electronic
crap with decent Linux machine?
-- 
vda




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