netdev - Re: csum offload and af

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Message-ID: <48A2C4DE.20005@trash.net>
Date:	Wed, 13 Aug 2008 13:26:22 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Herbert Xu <herbert@...dor.apana.org.au>
CC:	David Miller <davem@...emloft.net>, netdev@...eo.de,
	rusty@...tcorp.com.au, anthony@...emonkey.ws,
	netdev@...r.kernel.org
Subject: Re: csum offload and af_packet

Herbert Xu wrote:
> On Tue, Aug 12, 2008 at 05:55:32PM -0700, David Miller wrote:
>
>   
>> I kind of hope that libpcap/tcpdump has been taught about auxdata
>> by now, has it? :-/
>>     
>
> Unfortunately no.  This also means that if we do do this in AF_PACKET,
> then running a packet dump on a fast outbound interface may become more
> expensive.

Actually the current CVS version understands auxdata and uses it to
reconstruct VLAN headers. CVS seems to be broken though, I can send
you a tarball with the current version if you want.
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