netdev - Re: [0/7] [PPP]: Fix shared/cloned/non-linear skb bugs (was: malformed captured packets)

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Message-ID: <20070919115148.GB19866@gondor.apana.org.au>
Date:	Wed, 19 Sep 2007 19:51:48 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Toralf Förster <toralf.foerster@....de>
Cc:	netdev@...r.kernel.org, Paul Mackerras <paulus@...ba.org>,
	James Chapman <jchapman@...alix.com>
Subject: Re: [0/7] [PPP]: Fix shared/cloned/non-linear skb bugs (was: malformed captured packets)

On Tue, Sep 11, 2007 at 08:12:50PM +0200, Toralf Förster wrote:
> 
> I'm wondering why some UDP packets of the MS messenger protocol (with the usual
> text like "please click at www.we-destroy-your-computer.com") always have wrong
> check sums regardless whether sniffed at ppp0 or eth0 interface.

Maybe your wireshark is broken? I've tried wireshark and tcpdump
here and the sums look fine.

> and I'm wondering why it is still possible to capture such packets at eth0.

tcpdump happens before the packet goes into the IP stack which
is whare iptables lives.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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