From mboxrd@z Thu Jan  1 00:00:00 1970
From: apawar.linux@gmail.com (Abhijit Pawar)
Date: Thu, 17 Nov 2011 14:06:50 +0530
Subject: Registering for only Specific Packets from Net-Filter!!!!
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On 11/17/2011 12:03 PM, Mulyadi Santosa wrote:
> On Wed, Nov 16, 2011 at 17:50, Kesava Srinivas<vunnavafuture@gmail.com>  wrote:
>> HI Guys,
>>
>> I'm a Newbie to Linux Kernel Development. Need some Clarification in
>> understanding Net-Filter Hooks.
>>
>> Can I register only for the Necessary Packets [Ex: IPSEC etc...] from the
>> Net-Filters?? AFAIK ; Net-Filter Module send the Packets to the
>> Corresponding Module based on pre-defined HOOKS. Let us say; there are Many
>> Packets reaching that Hooks; and if I am Interested only in some Packets
>> from Net-Filter module; can I do that ???
> something like:
> iptables [some rules] -j ULOG
> ?
>
> Check "man iptables" and see if that suits your need. FYI ULOG target
> uses netlink to deliver the packet to user space for further
> processing.
>
>
>
Hi Kesava Srinivas,
If this is for any application in user space, I would recommend you take 
a look at libPcap.

Regards,
Abhijit Pawar