HI all,
I am working on a task which requires my netfilter based kernel
module (hooks at PRE_ROUTING and POST_ROUTING) to send same tcp packet
to multiple machines. What i have done in my hook is sk_buff_ptr =
pskb_copy(pskb) ; where pskb is original packet passed to my hook
function @ PRE_ROUTING by netfilter layer. and after modifying ip
address and ports
i do okfn(sk_buff_ptr). This is working and i am getting the desired output.
But i am not sure if this is correct way to do this kind of job ??
Or is there any other mechanism to achieve same.?? I want make sure
that the cloned packets travel the correct path in networking code and
not bypass something important.From what i have understood okfn
function will be anyway called with packet pointer passed to it
(ip_rcv_finish or similar) after the hooks . So this should not be an
issue but need confirmation/correction from netfilter community.
Thanks,
Rohit
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