From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Beverley <andy@andybev.com>
Subject: Re: libnfcontrack weirdness
Date: Mon, 02 Aug 2010 19:10:23 +0100
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To: Alex Bligh <alex@alex.org.uk>
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On Mon, 2010-08-02 at 17:20 +0100, Alex Bligh wrote:
> I may be doing something stupid here, but I can't seem to get information
> on an existing connection through libnfconntrack.
> 
> Code extract below. When passed a 4-tuple describing an existing connection,
> it prints "Found connection", when passed other stuff, it does not. So
> that much is working.
> 
> However, no ATTR_ stuff relating to the connection is printed out
> except for ATTR_ORIG_PORT_* which are synonyms of what has been
> set with nfct_set_attr.

You have to use a callback function to read any information back. Before
your nfct_query you should use nfct_callback_register to register a
callback function, which should contain your get_attr calls.

> I am having difficulty finding documentation for this,
>

The documentation is sparse, but there are some good examples in the
utils folder of the source code. Also, api.c is well commented for each
of the functions.

Regards,

Andy