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helenalinux 05-11-2010 10:20 AM

Netfilter hooks
 
Hello all,

I am researcher currently working on a project that requires me to implement a Netfilter hook to do some actions on some particular packets, by queuing them to the user space where I need to process them further and then send these packets back into the network stack.

I am a Netfilter newbie, so I don't really know how to start dealing with this problem. I've been searching for tutorials and clear explanations, but could not find something relevant.

I am using a linux kernel 2.6.31.14, and this hook is intended to be used coupled with a linux bridge.

So if you have any recommendations or document that might help me developing this, please feel free to share them here!

Thanks in advance for your help !

Saptarshi4031 05-12-2010 10:21 AM

For understanding hooks,check out Rusty Russels document...on lwn
and linux bridges ,check out Understanding Linux Nework Internals....(2.4)

paulsm4 05-13-2010 09:49 AM

Hi, Helenalinux:

Two good resources:

http://netfilter.org/documentation/H...g-HOWTO-4.html

http://ebtables.sourceforge.net/br_fw_ia/br_fw_ia.html

However, it sounds like you're probably going to need to dig into the iptables code.

'Hope that helps .. PSM


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