/*
   * (C) 2003,2004 USAGI/WIDE Project <http://www.linux-ipv6.org>
   *
   * Based largely upon the original ip_conntrack code which
   * had the following copyright information:
   *
   * (C) 1999-2001 Paul `Rusty' Russell
   * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   *
   * Author:
   *	Yasuyuki Kozakai @USAGI	<yasuyuki.kozakai@toshiba.co.jp>
   */

  #include <linux/types.h>
  #include <linux/ip.h>
  #include <linux/netfilter.h>
  #include <linux/module.h>
  #include <linux/skbuff.h>
  #include <linux/icmp.h>
  #include <linux/sysctl.h>
  #include <net/ip.h>
  
  #include <linux/netfilter_ipv4.h>
  #include <net/netfilter/nf_conntrack.h>

  #include <net/netfilter/nf_conntrack_l4proto.h>

  #include <net/netfilter/nf_conntrack_l3proto.h>
  #include <net/netfilter/nf_conntrack_core.h>
  #include <net/netfilter/ipv4/nf_conntrack_ipv4.h>

  static bool generic_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
  				 struct nf_conntrack_tuple *tuple)

  {
  	memset(&tuple->src.u3, 0, sizeof(tuple->src.u3));
  	memset(&tuple->dst.u3, 0, sizeof(tuple->dst.u3));

  	return true;

  }

  static bool generic_invert_tuple(struct nf_conntrack_tuple *tuple,
  				 const struct nf_conntrack_tuple *orig)

  {
  	memset(&tuple->src.u3, 0, sizeof(tuple->src.u3));
  	memset(&tuple->dst.u3, 0, sizeof(tuple->dst.u3));

  	return true;

  }
  
  static int generic_print_tuple(struct seq_file *s,
  			    const struct nf_conntrack_tuple *tuple)
  {
  	return 0;
  }

  static int generic_get_l4proto(const struct sk_buff *skb, unsigned int nhoff,
  			       unsigned int *dataoff, u_int8_t *protonum)

  {
  	/* Never track !!! */
  	return -NF_ACCEPT;
  }

  struct nf_conntrack_l3proto nf_conntrack_l3proto_generic __read_mostly = {

  	.l3proto	 = PF_UNSPEC,
  	.name		 = "unknown",
  	.pkt_to_tuple	 = generic_pkt_to_tuple,
  	.invert_tuple	 = generic_invert_tuple,
  	.print_tuple	 = generic_print_tuple,

  	.get_l4proto	 = generic_get_l4proto,

  };

  EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_generic);