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>"); |
Jan Engelhardt | 2ae15b6 | 2008-01-14 23:42:28 -0800 | [diff] [blame] | 13 | MODULE_DESCRIPTION("Xtables: No-op match which can be tagged with a comment"); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 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 |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 19 | comment_mt(const struct sk_buff *skb, const struct net_device *in, |
| 20 | const struct net_device *out, const struct xt_match *match, |
| 21 | const void *matchinfo, int offset, unsigned int protooff, |
| 22 | bool *hotdrop) |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 23 | { |
| 24 | /* We always match */ |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 25 | return true; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 26 | } |
| 27 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 28 | static struct xt_match comment_mt_reg[] __read_mostly = { |
Patrick McHardy | 4470bbc | 2006-08-22 00:34:04 -0700 | [diff] [blame] | 29 | { |
| 30 | .name = "comment", |
| 31 | .family = AF_INET, |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 32 | .match = comment_mt, |
Patrick McHardy | 4470bbc | 2006-08-22 00:34:04 -0700 | [diff] [blame] | 33 | .matchsize = sizeof(struct xt_comment_info), |
| 34 | .me = THIS_MODULE |
| 35 | }, |
| 36 | { |
| 37 | .name = "comment", |
| 38 | .family = AF_INET6, |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 39 | .match = comment_mt, |
Patrick McHardy | 4470bbc | 2006-08-22 00:34:04 -0700 | [diff] [blame] | 40 | .matchsize = sizeof(struct xt_comment_info), |
| 41 | .me = THIS_MODULE |
| 42 | }, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 43 | }; |
| 44 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 45 | static int __init comment_mt_init(void) |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 46 | { |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 47 | return xt_register_matches(comment_mt_reg, ARRAY_SIZE(comment_mt_reg)); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 48 | } |
| 49 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 50 | static void __exit comment_mt_exit(void) |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 51 | { |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 52 | xt_unregister_matches(comment_mt_reg, ARRAY_SIZE(comment_mt_reg)); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 53 | } |
| 54 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 55 | module_init(comment_mt_init); |
| 56 | module_exit(comment_mt_exit); |