Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6
[linux-2.6.git] / net / netfilter / nf_conntrack_l3proto_generic.c
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 static bool generic_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
35                                  struct nf_conntrack_tuple *tuple)
36 {
37         memset(&tuple->src.u3, 0, sizeof(tuple->src.u3));
38         memset(&tuple->dst.u3, 0, sizeof(tuple->dst.u3));
39
40         return true;
41 }
42
43 static bool generic_invert_tuple(struct nf_conntrack_tuple *tuple,
44                                  const struct nf_conntrack_tuple *orig)
45 {
46         memset(&tuple->src.u3, 0, sizeof(tuple->src.u3));
47         memset(&tuple->dst.u3, 0, sizeof(tuple->dst.u3));
48
49         return true;
50 }
51
52 static int generic_print_tuple(struct seq_file *s,
53                             const struct nf_conntrack_tuple *tuple)
54 {
55         return 0;
56 }
57
58 static int generic_get_l4proto(const struct sk_buff *skb, unsigned int nhoff,
59                                unsigned int *dataoff, u_int8_t *protonum)
60 {
61         /* Never track !!! */
62         return -NF_ACCEPT;
63 }
64
65
66 struct nf_conntrack_l3proto nf_conntrack_l3proto_generic __read_mostly = {
67         .l3proto         = PF_UNSPEC,
68         .name            = "unknown",
69         .pkt_to_tuple    = generic_pkt_to_tuple,
70         .invert_tuple    = generic_invert_tuple,
71         .print_tuple     = generic_print_tuple,
72         .get_l4proto     = generic_get_l4proto,
73 };
74 EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_generic);