Hi, I want to extend the netfilter to user mode. I read some literature on the same which talks about a file netfilter_device.h which defines the IOCTL's ioctl(fd, NFDIOSADDCOND, &a_nfdev_condition); ioctl(fd, NFDIOSDELCOND, &a_nfdev_condition); I am unable to find the netfilter_device.h in the source code of linux. Please can anybody guide me on how to extend the NEtfilter to user space. Thanks, Ashish