From mboxrd@z Thu Jan  1 00:00:00 1970
From: Srinivasa T N <seenutn@linux.vnet.ibm.com>
Subject: Re: [NFLOG] How to determine the connection a packet belongs to?
Date: Tue, 07 Jun 2011 17:55:02 +0530
Message-ID: <4DEE189E.8070403@linux.vnet.ibm.com>
References: <BANLkTimnO5UzNvq6SfuWc7osck=QL=HrMw@mail.gmail.com> <4DED6538.3090404@netfilter.org> <BANLkTi=7eDTNM+OEuDnZucX2sc4Bck_Q6w@mail.gmail.com>
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To: Clemens Eisserer <linuxhippy@gmail.com>
Cc: netfilter@vger.kernel.org

On 06/07/2011 04:10 PM, Clemens Eisserer wrote:
> Hi,
>
>> You can build the tuple from the packet in user-space to look up the
>> conntrack via libnetfilter_conntrack.
>
> How can I do that?
>
> Assuming there are two open connections:
> IP1:80<---->  IP2:39678
> IP1:39678<----->  IP2:80
>
> How can I know which packet belongs to which connection?
>
> Thanks, Clemens
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Am not an expert, but can't you match the src and dst address/port in 
each packet?

Regards,
Seenu.