Netfilter nf_tables socket match support

modulename: nft_socket.ko

configname: CONFIG_NFT_SOCKET

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>Core Netfilter Configuration
└─>The IPv6 protocol
└─>The IPv6 protocol
└─>Netfilter nf_tables socket match support
In linux kernel since version 4.2 (release Date: 2015-08-30)  
This option allows matching for the presence or absence of a
corresponding socket and its attributes.

source code:
net/netfilter/nft_socket.c