nf_tables fib / ip route lookup support

modulename: nft_fib_ipv4.ko

configname: CONFIG_NFT_FIB_IPV4

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>IP: Netfilter Configuration
└─>nf_tables fib / ip route lookup support
In linux kernel since version 4.1 (release Date: 2015-06-21)  
This module enables IPv4 FIB lookups, e.g. for reverse path filtering.
It also allows query of the FIB for the route type, e.g. local, unicast,
multicast or blackhole.

source code: