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