Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 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("iptables comment match module"); |
| 14 | MODULE_LICENSE("GPL"); |
| 15 | MODULE_ALIAS("ipt_comment"); |
| 16 | MODULE_ALIAS("ip6t_comment"); |
| 17 | |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 18 | static bool |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 19 | match(const struct sk_buff *skb, |
| 20 | const struct net_device *in, |
| 21 | const struct net_device *out, |
Patrick McHardy | c498673 | 2006-03-20 18:02:56 -0800 | [diff] [blame] | 22 | const struct xt_match *match, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 23 | const void *matchinfo, |
| 24 | int offset, |
| 25 | unsigned int protooff, |
Jan Engelhardt | cff533a | 2007-07-07 22:15:12 -0700 | [diff] [blame] | 26 | bool *hotdrop) |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 27 | { |
| 28 | /* We always match */ |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 29 | return true; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 30 | } |
| 31 | |
Patrick McHardy | 9f15c53 | 2007-07-07 22:22:02 -0700 | [diff] [blame] | 32 | static struct xt_match xt_comment_match[] __read_mostly = { |
Patrick McHardy | 4470bbc | 2006-08-22 00:34:04 -0700 | [diff] [blame] | 33 | { |
| 34 | .name = "comment", |
| 35 | .family = AF_INET, |
| 36 | .match = match, |
| 37 | .matchsize = sizeof(struct xt_comment_info), |
| 38 | .me = THIS_MODULE |
| 39 | }, |
| 40 | { |
| 41 | .name = "comment", |
| 42 | .family = AF_INET6, |
| 43 | .match = match, |
| 44 | .matchsize = sizeof(struct xt_comment_info), |
| 45 | .me = THIS_MODULE |
| 46 | }, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 47 | }; |
| 48 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 49 | static int __init xt_comment_init(void) |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 50 | { |
Patrick McHardy | 4470bbc | 2006-08-22 00:34:04 -0700 | [diff] [blame] | 51 | return xt_register_matches(xt_comment_match, |
| 52 | ARRAY_SIZE(xt_comment_match)); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 53 | } |
| 54 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 55 | static void __exit xt_comment_fini(void) |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 56 | { |
Patrick McHardy | 4470bbc | 2006-08-22 00:34:04 -0700 | [diff] [blame] | 57 | xt_unregister_matches(xt_comment_match, ARRAY_SIZE(xt_comment_match)); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 58 | } |
| 59 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 60 | module_init(xt_comment_init); |
| 61 | module_exit(xt_comment_fini); |