From mboxrd@z Thu Jan  1 00:00:00 1970
From: Patrick McHardy <kaber@trash.net>
Subject: Re: Iptables Match on Direction (IP_CT_IS_REPLY)
Date: Sat, 05 Mar 2005 00:27:08 +0100
Message-ID: <4228EECC.5000504@trash.net>
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Cc: netfilter-devel@lists.netfilter.org
To: Peter Lenci <peterlenci@yahoo.ca>
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Peter Lenci wrote:
> I studied conntrack but didn't find a way to read the direction
> of the packet. In fact I was thinking about writing a patch for that
> module to add an option "--direction original|reply|both".
> 
> How exactly would you determine the direction with conntrack?

CTINFO2DIR(ctinfo) of ctinfo returned by ip_conntrack_get gives you the
direction. If you want to make a patch for ipt_conntrack it should be
similar to Rusty's recent patch "Add bitops to ipt_MARK without breaking
compatbility".

Regards
Patrick