1/*
2 * (C) 2003,2004 USAGI/WIDE Project <http://www.linux-ipv6.org>
3 *
4 * Based largely upon the original ip_conntrack code which
5 * had the following copyright information:
6 *
7 * (C) 1999-2001 Paul `Rusty' Russell
8 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * Author:
15 *	Yasuyuki Kozakai @USAGI	<yasuyuki.kozakai@toshiba.co.jp>
16 */
17
18#include <linux/types.h>
19#include <linux/ip.h>
20#include <linux/netfilter.h>
21#include <linux/module.h>
22#include <linux/skbuff.h>
23#include <linux/icmp.h>
24#include <linux/sysctl.h>
25#include <net/ip.h>
26
27#include <linux/netfilter_ipv4.h>
28#include <net/netfilter/nf_conntrack.h>
29#include <net/netfilter/nf_conntrack_l4proto.h>
30#include <net/netfilter/nf_conntrack_l3proto.h>
31#include <net/netfilter/nf_conntrack_core.h>
32#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
33
34#define DEBUGP(format, args...)
35
36static int generic_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
37				struct nf_conntrack_tuple *tuple)
38{
39	memset(&tuple->src.u3, 0, sizeof(tuple->src.u3));
40	memset(&tuple->dst.u3, 0, sizeof(tuple->dst.u3));
41
42	return 1;
43}
44
45static int generic_invert_tuple(struct nf_conntrack_tuple *tuple,
46			   const struct nf_conntrack_tuple *orig)
47{
48	memset(&tuple->src.u3, 0, sizeof(tuple->src.u3));
49	memset(&tuple->dst.u3, 0, sizeof(tuple->dst.u3));
50
51	return 1;
52}
53
54static int generic_print_tuple(struct seq_file *s,
55			    const struct nf_conntrack_tuple *tuple)
56{
57	return 0;
58}
59
60static int generic_print_conntrack(struct seq_file *s,
61				const struct nf_conn *conntrack)
62{
63	return 0;
64}
65
66static int
67generic_prepare(struct sk_buff **pskb, unsigned int hooknum,
68		unsigned int *dataoff, u_int8_t *protonum)
69{
70	/* Never track !!! */
71	return -NF_ACCEPT;
72}
73
74
75static u_int32_t generic_get_features(const struct nf_conntrack_tuple *tuple)
76
77{
78	return NF_CT_F_BASIC;
79}
80
81struct nf_conntrack_l3proto nf_conntrack_l3proto_generic = {
82	.l3proto	 = PF_UNSPEC,
83	.name		 = "unknown",
84	.pkt_to_tuple	 = generic_pkt_to_tuple,
85	.invert_tuple	 = generic_invert_tuple,
86	.print_tuple	 = generic_print_tuple,
87	.print_conntrack = generic_print_conntrack,
88	.prepare	 = generic_prepare,
89	.get_features	 = generic_get_features,
90};
91EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_generic);
92