Netlink Sockets: Addind a new socket family

• Kernel version 3.13, Ubuntu 14.04
• $ uname -a
  Linux ubuntu 3.13.0-37-generic #64-Ubuntu SMP Mon Sep 22 21:28:38 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
• We need two changes:
• User space
  • Locate the file “netlink.h”
  • $ sudo locate “netlink.h”
  • You would get the header file at “/usr/include/linux/netlink.h”
  • Add the new family
  • #define NETLINK_MY     17
  • Keep the number less than 32
  • In you user application, add “#define NELINK_MY 17”
• Kernel space
  • Locate the netlikn file for kernel space
  • /usr/src/linux-headers-3.13.0-24/include/uapi/linux/netlink.h
  • Add exact definition here as well
• No recompilation of kernel is required.
• References:
  • http://stackoverflow.com/questions/15215865/netlink-sockets-in-c-using-the-3-x-linux-kernel