netdev - Re: libpcap and tc filters

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Date:	Tue, 05 Jul 2011 09:56:53 -0400
From:	jamal <hadi@...erus.ca>
To:	Adam Katz <adamkatz0@...il.com>
Cc:	netdev@...r.kernel.org
Subject: Re: libpcap and tc filters

On Tue, 2011-07-05 at 16:07 +0300, Adam Katz wrote:

> second, I just took at the libpcap source code and it seems it's using
> the same ETH_P_ALL option when binding to an interface. So based on
> what you're saying, the same solution of patching libpcap and
> replacing ETH_P_ALL with  ETH_P_IP should also make these rules work
> with traffic sent using pure libpcap or any libpcap - based
> application.

ETH_P_ALL makes sense if you are unsure it is going to be IP. So i would
change/optimize apps only for IP if they are intended to deal with IP
only (same for ARP etc).
In your case, it seems it is tcp only - which runs on top of IP. So
it makes sense to do it for that specific use case etc.

cheers,
jamal


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