Commit | Line | Data |
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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
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> | |
2e4e6a17 HW |
10 | #include <linux/netfilter/x_tables.h> |
11 | #include <linux/netfilter/xt_comment.h> | |
1da177e4 LT |
12 | |
13 | MODULE_AUTHOR("Brad Fisher <brad@info-link.net>"); | |
2ae15b64 | 14 | MODULE_DESCRIPTION("Xtables: No-op match which can be tagged with a comment"); |
1da177e4 | 15 | MODULE_LICENSE("GPL"); |
2e4e6a17 HW |
16 | MODULE_ALIAS("ipt_comment"); |
17 | MODULE_ALIAS("ip6t_comment"); | |
1da177e4 | 18 | |
1d93a9cb | 19 | static bool |
62fc8051 | 20 | comment_mt(const struct sk_buff *skb, struct xt_action_param *par) |
1da177e4 LT |
21 | { |
22 | /* We always match */ | |
1d93a9cb | 23 | return true; |
1da177e4 LT |
24 | } |
25 | ||
ab4f21e6 JE |
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, | |
1da177e4 LT |
33 | }; |
34 | ||
d3c5ee6d | 35 | static int __init comment_mt_init(void) |
1da177e4 | 36 | { |
ab4f21e6 | 37 | return xt_register_match(&comment_mt_reg); |
1da177e4 LT |
38 | } |
39 | ||
d3c5ee6d | 40 | static void __exit comment_mt_exit(void) |
1da177e4 | 41 | { |
ab4f21e6 | 42 | xt_unregister_match(&comment_mt_reg); |
1da177e4 LT |
43 | } |
44 | ||
d3c5ee6d JE |
45 | module_init(comment_mt_init); |
46 | module_exit(comment_mt_exit); |