Wrapper on top of libnfnetlink using FFI

 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.
 .
 This package contains a small, still incomplete, wrapper around libnfnetlink.