/*
   * Implements a dummy match to allow attaching comments to rules
   *
   * 2003-05-13 Brad Fisher (brad@info-link.net)
   */
  
  #include <linux/module.h>
  #include <linux/skbuff.h>
  #include <linux/netfilter/x_tables.h>
  #include <linux/netfilter/xt_comment.h>
  
  MODULE_AUTHOR("Brad Fisher <brad@info-link.net>");
  MODULE_DESCRIPTION("Xtables: No-op match which can be tagged with a comment");
  MODULE_LICENSE("GPL");
  MODULE_ALIAS("ipt_comment");
  MODULE_ALIAS("ip6t_comment");
  
  static bool
  comment_mt(const struct sk_buff *skb, struct xt_action_param *par)
  {
  	/* We always match */
  	return true;
  }
  
  static struct xt_match comment_mt_reg __read_mostly = {
  	.name      = "comment",
  	.revision  = 0,
  	.family    = NFPROTO_UNSPEC,
  	.match     = comment_mt,
  	.matchsize = sizeof(struct xt_comment_info),
  	.me        = THIS_MODULE,
  };
  
  static int __init comment_mt_init(void)
  {
  	return xt_register_match(&comment_mt_reg);
  }
  
  static void __exit comment_mt_exit(void)
  {
  	xt_unregister_match(&comment_mt_reg);
  }
  
  module_init(comment_mt_init);
  module_exit(comment_mt_exit);