Hi,
I have registered my own protocol handler using dev_add_pack. When I receive the packet my function is being invoked correctly with the skb. If I print the skb data using printk it shows correctly but if I queue up the skb or do any other operation on it the kernel crashes. I would be thankful if someone could point out the problem.

Thanks in advance,

Imran Sadat.

I can only speak from writing interrupt service routines in assembly code back in school, but I remember running into problems from not storing values in certain registers and restoring them after I was done. Also, you have to make sure to call the proper handler from your own handler so as not to break the chain. For instance, if A() calls B(), but your method X() replaces A(), and DOESN'T call B(), well then the system is broken. I assume your code is just a hook and not meant to replace the existing code. To make things work as planned, I would imagine you want your method X() to call A() so that it can in turn call B() and keep the cycle going.

Dunno if any of that helped, but I'm trying to answer what few posts I may be vaguely helpful with

Thanks for your reply.
I rewrote the whole thing again from scratch and its now working. The code had grown quite complex and now I have completely modularized it.

Pardon me, but what code is that?

Its my final year project. I am implementing a high speed data transfer protocol on Linux.