communincation between kernel module and user space

Hi all,

I am working on one kernel module, which is using ebt hook. However, I want to control the access control through a user space program. Currently I am using the setsocketopt mechanism. When I run user space program and pass the information to the kernel module, the kernel module does detect there is information being passing into it, and is being called. However, the information which the kernel module receives is not the same as what I sent. I am not sure why.

Does anyone happen to know how to do it?

Thanks!

Xiaodong