buildroot

config BR2_PACKAGE_LIBNFNETLINK

    bool "libnfnetlink"

    help

      libnfnetlink is the low-level library for netfilter related

      kernel/userspace communication.

      It provides a generic messaging infrastructure for in-kernel

      netfilter subsystems (such as nfnetlink_log, nfnetlink_queue,

      nfnetlink_conntrack) and their respective users

      and/or management tools in userspace.

​

      http://www.netfilter.org/projects/libnfnetlink/