Playing with Network Stack

Greetings,

I hoping someone here can help point me in the right direction. I had an
idea for project, but I lack some of the know how. I was wonder if it might
be possible to have a kernel module or an application that can inspect
and mangle a packet before it gets routed? I don't want to just sniff the
traffic. I want to be able to look at the packet and then hand it back to
the network stack for processing. If so is there some reading or example
code I could look at?


Thanks in advance,

-James
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From: kernelnewbies-bounces+jharan=bytemobile.com@kernelnewbies.org [mailto:kernelnewbies-bounces+jharan=bytemobile.com at kernelnewbies.org] On Behalf Of james jones
Sent: Tuesday, March 13, 2012 1:50 PM
To: kernelnewbies at kernelnewbies.org
Subject: Playing with Network Stack

Greetings,

I hoping someone here can help point me in the right direction. I had an idea for project, but I lack some of the know how. I was wonder if it might be possible to have a kernel module or an application that can inspect and mangle a packet before it gets routed? I don't want to just sniff the traffic. I want to be able to look at the packet and then hand it back to the network stack for processing. If so is there some reading or example code I could look at?


Thanks in advance,

-James

You probably want to do a search on "netfilter hook".

Jeff Haran


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You can try lipipq
http://linux.die.net/man/3/libipq

Regards,
Sankalp.
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libipq will not give me what I want. I want this to be complete transparent
to the user space.

On Wed, Mar 14, 2012 at 12:42 AM, Sankalp Bagaria [off-list ref]wrote:

You can try lipipq
http://linux.die.net/man/3/libipq

Regards,
Sankalp.

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