// SPDX-License-Identifier: GPL-2.0-only/* * Implements a dummy match to allow attaching comments to rules * * 2003-05-13 Brad Fisher (brad@info-link.net) */ #include <linux/module.h>#include <linux/skbuff.h>#include <linux/netfilter/x_tables.h>#include <linux/netfilter/xt_comment.h> MODULE_AUTHOR("Brad Fisher <brad@info-link.net>");MODULE_DESCRIPTION("Xtables: No-op match which can be tagged with a comment");MODULE_LICENSE("GPL");MODULE_ALIAS("ipt_comment");MODULE_ALIAS("ip6t_comment"); static boolcomment_mt(const struct sk_buff *skb, struct xt_action_param *par){	/* We always match */	return true;} static struct xt_match comment_mt_reg __read_mostly = {	.name      = "comment",	.revision  = 0,	.family    = NFPROTO_UNSPEC,	.match     = comment_mt,	.matchsize = sizeof(struct xt_comment_info),	.me        = THIS_MODULE,}; static int __init comment_mt_init(void){	return xt_register_match(&comment_mt_reg);} static void __exit comment_mt_exit(void){	xt_unregister_match(&comment_mt_reg);} module_init(comment_mt_init);module_exit(comment_mt_exit);