From mboxrd@z Thu Jan  1 00:00:00 1970
From: Patrick McHardy <kaber@trash.net>
Subject: Re: Data rate of a connection using conntrack
Date: Wed, 28 Oct 2009 17:25:14 +0100
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Cc: netfilter-devel@vger.kernel.org
To: Anand Raj Manickam <anandrm@gmail.com>
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Anand Raj Manickam wrote:
> I understand from RATEEST that data rate of an interface is estimated
> using the gen_new_estimator , which is also used by the TC , qdisc n
> folks ...
> Has anybody tried to estimate the data rate of a connection using conntrack ?
> Anyone's previous attempts or experiences  are welcome.

There has been a patch a (long) while ago which was somehow
based on conntrack. You should be able to find it in the
old patch-o-matic (not -ng) repository.