// 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 bool comment_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); |