sk_buff examples

[Steven J Scott]

Hello,

I am trying to decode packets within the kernel using netfilter hooks, and 
I have read through multiple examples of parsing the src and dst address, 
ports, etc., but I am unable to find any information on parsing the 
payload of the packet.  What I am trying to do is examine payload to find 
a string match. Could anyone point me in the right direction.

Thanks a lot.

Steve