xt_comment.c revision 1d93a9cbad608f6398ba6c5b588c504ccd35a2ca
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 12MODULE_AUTHOR("Brad Fisher <brad@info-link.net>"); 13MODULE_DESCRIPTION("iptables comment match module"); 14MODULE_LICENSE("GPL"); 15MODULE_ALIAS("ipt_comment"); 16MODULE_ALIAS("ip6t_comment"); 17 18static bool 19match(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 bool *hotdrop) 27{ 28 /* We always match */ 29 return true; 30} 31 32static 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 49static int __init xt_comment_init(void) 50{ 51 return xt_register_matches(xt_comment_match, 52 ARRAY_SIZE(xt_comment_match)); 53} 54 55static void __exit xt_comment_fini(void) 56{ 57 xt_unregister_matches(xt_comment_match, ARRAY_SIZE(xt_comment_match)); 58} 59 60module_init(xt_comment_init); 61module_exit(xt_comment_fini); 62