Of course you can code a netfilter target extension module. Changing
the main kernel network code directly is not necessairy.

Check out the pdf for writing such modules under

http://jengelh.medozas.de/

Check out the
Greetings
t.

On Thu, Aug 28, 2008 at 4:48 PM, Thiago Lacerda <thiagotbl@gmail.com> wrote:
quoted text
> Hi everyone, I'm a Computer Science student from Brazil.
>
> Hope that you can help me with my undergraduate conclusion project.
>
> I have to capture packets at kernel level. More specifically, I have
> to write a kernel module (for kernel 2.6) that access all the packets
> that are coming through my network interface, then perform some
> operations on that packets and then decide if they can go to user land
> or not.
>
> Please note that I can't do it as a firewall, because I can't
> interfere on the  applications that  work with network. My kernel
> module will get communicated with traffic classifier, that will be
> executing at user land and will inspect the packets that the module
> passed to it.
>
> Can you help me on how can I develop it?
>
> Thanks in advance
>
> Best regards
>
>
> --
> Thiago de Barros Lacerda
> Computer Science Undergraduate Student - CIn/UFPE - 2004.2
> Researcher/Software Developer - GPRT - Networking and
> Telecommunications Research Group
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