Match-all classifier

modulename: cls_matchall.ko

configname: CONFIG_NET_CLS_MATCHALL

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>QoS and/or fair queueing
└─>Match-all classifier
In linux kernel since version 4.1 (release Date: 2015-06-21)  
If you say Y here, you will be able to classify packets based on
nothing. Every packet will match.

To compile this code as a module, choose M here: the module will
be called cls_matchall.

source code: