Commit | Line | Data |
---|---|---|
1da177e4 LT |
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_ipv4/ip_tables.h> | |
10 | #include <linux/netfilter_ipv4/ipt_comment.h> | |
11 | ||
12 | MODULE_AUTHOR("Brad Fisher <brad@info-link.net>"); | |
13 | MODULE_DESCRIPTION("iptables comment match module"); | |
14 | MODULE_LICENSE("GPL"); | |
15 | ||
16 | static int | |
17 | match(const struct sk_buff *skb, | |
18 | const struct net_device *in, | |
19 | const struct net_device *out, | |
20 | const void *matchinfo, | |
21 | int offset, | |
22 | int *hotdrop) | |
23 | { | |
24 | /* We always match */ | |
25 | return 1; | |
26 | } | |
27 | ||
28 | static int | |
29 | checkentry(const char *tablename, | |
30 | const struct ipt_ip *ip, | |
31 | void *matchinfo, | |
32 | unsigned int matchsize, | |
33 | unsigned int hook_mask) | |
34 | { | |
35 | /* Check the size */ | |
36 | if (matchsize != IPT_ALIGN(sizeof(struct ipt_comment_info))) | |
37 | return 0; | |
38 | return 1; | |
39 | } | |
40 | ||
41 | static struct ipt_match comment_match = { | |
42 | .name = "comment", | |
43 | .match = match, | |
44 | .checkentry = checkentry, | |
45 | .me = THIS_MODULE | |
46 | }; | |
47 | ||
48 | static int __init init(void) | |
49 | { | |
50 | return ipt_register_match(&comment_match); | |
51 | } | |
52 | ||
53 | static void __exit fini(void) | |
54 | { | |
55 | ipt_unregister_match(&comment_match); | |
56 | } | |
57 | ||
58 | module_init(init); | |
59 | module_exit(fini); |