| 1 | // SPDX-License-Identifier: GPL-2.0-only |
|---|---|
| 2 | /* |
| 3 | * Implements a dummy match to allow attaching comments to rules |
| 4 | * |
| 5 | * 2003-05-13 Brad Fisher (brad@info-link.net) |
| 6 | */ |
| 7 | |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/skbuff.h> |
| 10 | #include <linux/netfilter/x_tables.h> |
| 11 | #include <linux/netfilter/xt_comment.h> |
| 12 | |
| 13 | MODULE_AUTHOR("Brad Fisher <brad@info-link.net>"); |
| 14 | MODULE_DESCRIPTION("Xtables: No-op match which can be tagged with a comment"); |
| 15 | MODULE_LICENSE("GPL"); |
| 16 | MODULE_ALIAS("ipt_comment"); |
| 17 | MODULE_ALIAS("ip6t_comment"); |
| 18 | |
| 19 | static bool |
| 20 | comment_mt(const struct sk_buff *skb, struct xt_action_param *par) |
| 21 | { |
| 22 | /* We always match */ |
| 23 | return true; |
| 24 | } |
| 25 | |
| 26 | static struct xt_match comment_mt_reg __read_mostly = { |
| 27 | .name = "comment", |
| 28 | .revision = 0, |
| 29 | .family = NFPROTO_UNSPEC, |
| 30 | .match = comment_mt, |
| 31 | .matchsize = sizeof(struct xt_comment_info), |
| 32 | .me = THIS_MODULE, |
| 33 | }; |
| 34 | |
| 35 | static int __init comment_mt_init(void) |
| 36 | { |
| 37 | return xt_register_match(target: &comment_mt_reg); |
| 38 | } |
| 39 | |
| 40 | static void __exit comment_mt_exit(void) |
| 41 | { |
| 42 | xt_unregister_match(target: &comment_mt_reg); |
| 43 | } |
| 44 | |
| 45 | module_init(comment_mt_init); |
| 46 | module_exit(comment_mt_exit); |
| 47 |