Accessing Skbuff in RTLinux

Hi,

I am a student and newbie to RTLinux and I am using
free version of RTLinux.

I am using linux kernel 2.4.20 for a small networking
project. I divert the linux network packets from
netfilter post route hooks to my kernel module and add
my own ethernet addresses in the eth header and sends
the packet out by calling dev_queue_xmit() at a
precise time interval .

Now I want to achieve the same with RTLinux. 

My questions are
1) Can I access skbuff pointer in Linux kernel module
and as well as RTLinux process at the same time? If
yes how to achieve the synchronization between these
two? If not, can it be achieved by calling alloc_skb()
in RTLinux process and copying the original buffer
through FIFOs?

2) How can we achieve synchronization between my linux
kernel module and my RTLinux module?

3) Can I access ethernet driver functions (like
dev_queue_xmit) from RTLinux module?

4) I have a softIRQ in my linux kernel module. Does it
work seemly with RTLinux module?

Thanks & Regards,
GVS

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