using skbuff functions in kernel module

[cranium2003]

Hello,
I want to add new header between IP and ETHERNET
layer. I want to ask can it be done using netfilter
hooks? 

Can skb functions (skb_reserve,skb_push,skb_pull)be
allowed to use in kernel module so that i can add at
NF_IP_LOCAL_OUT and pull my own header at
NF_IP_LOCAL_IN?
I want to add header using kernel modules.

regards,
cranium


		
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