From mboxrd@z Thu Jan  1 00:00:00 1970
From: Patrick McHardy <kaber@trash.net>
Subject: Re: [PATCH] new 'tcpack' match
Date: Sun, 03 Apr 2005 20:15:49 +0200
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To: Jonas Berlin <xkr47@outerspace.dyndns.org>
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Jonas Berlin wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Matches TCP packets that has no payload, i.e. contains only ACKs.
> 
> ~  iptables -A INPUT -p tcp -m tcpack --tcpack -j CLASSIFY 1:10
> 
> Or match non-ack packets:
> 
> ~  iptables -A INPUT -p tcp -m tcpack ! --tcpack -j CLASSIFY 1:12

I can see that it would be useful, given all the half-working ACK
matching rules for shaping floating around, but we already a tcp
match, so it should be done in there, and, if possible, kept a little
bit more generic. Perhaps a data-len match option.

Regards
Patrick