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 18 static int 19 match(const struct sk_buff *skb, 20 const struct net_device *in, 21 const struct net_device *out, 22 const struct xt_match *match, 23 const void *matchinfo, 24 int offset, 25 unsigned int protooff, 26 int *hotdrop) 27 { 28 /* We always match */ 29 return 1; 30 } 31 32 static struct xt_match xt_comment_match[] = { 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 }, 47 }; 48 49 static int __init xt_comment_init(void) 50 { 51 return xt_register_matches(xt_comment_match, 52 ARRAY_SIZE(xt_comment_match)); 53 } 54 55 static void __exit xt_comment_fini(void) 56 { 57 xt_unregister_matches(xt_comment_match, ARRAY_SIZE(xt_comment_match)); 58 } 59 60 module_init(xt_comment_init); 61 module_exit(xt_comment_fini); 62