netfilter hook not work in 2.6 kernel

Hi,

I used to write a kernel module that register a netfilter hook in 
NF_BR_PRE_ROUTING and a network driver to which I can inject pcap file.My 
network driver will simulate 2 network interfaces and I'll add them to a 
bridge. Then every packet I inject will pass through the netfilter hook 
function. That was done in kernel 2.4.
Now I switch my program to kernel 2.6 and it does not work anymore. The data is 
still injected to my network driver but it won't pass through the hook 
function. I dump the data before calling netif_rx(skb) and the content is 
correct. Is there any significant change on the behavior between kernel 2.4 and 
2.6?
I'd glad to provide more info about my program if anyone needs. Thanks very 
much.



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