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Linux/net/netfilter/xt_comment.c

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  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("Xtables: No-op match which can be tagged with a comment");
 14 MODULE_LICENSE("GPL");
 15 MODULE_ALIAS("ipt_comment");
 16 MODULE_ALIAS("ip6t_comment");
 17 
 18 static bool
 19 comment_mt(const struct sk_buff *skb, struct xt_action_param *par)
 20 {
 21         /* We always match */
 22         return true;
 23 }
 24 
 25 static struct xt_match comment_mt_reg __read_mostly = {
 26         .name      = "comment",
 27         .revision  = 0,
 28         .family    = NFPROTO_UNSPEC,
 29         .match     = comment_mt,
 30         .matchsize = sizeof(struct xt_comment_info),
 31         .me        = THIS_MODULE,
 32 };
 33 
 34 static int __init comment_mt_init(void)
 35 {
 36         return xt_register_match(&comment_mt_reg);
 37 }
 38 
 39 static void __exit comment_mt_exit(void)
 40 {
 41         xt_unregister_match(&comment_mt_reg);
 42 }
 43 
 44 module_init(comment_mt_init);
 45 module_exit(comment_mt_exit);
 46 

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