d8b501878d9fbf71f1c59fea03f748364fe52120
[linux-2.6.git] / net / netfilter / nf_conntrack_proto_generic.c
1 /* (C) 1999-2001 Paul `Rusty' Russell
2  * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  */
8
9 #include <linux/types.h>
10 #include <linux/jiffies.h>
11 #include <linux/timer.h>
12 #include <linux/netfilter.h>
13 #include <net/netfilter/nf_conntrack_l4proto.h>
14
15 static unsigned int nf_ct_generic_timeout __read_mostly = 600*HZ;
16
17 static int generic_pkt_to_tuple(const struct sk_buff *skb,
18                                 unsigned int dataoff,
19                                 struct nf_conntrack_tuple *tuple)
20 {
21         tuple->src.u.all = 0;
22         tuple->dst.u.all = 0;
23
24         return 1;
25 }
26
27 static int generic_invert_tuple(struct nf_conntrack_tuple *tuple,
28                                 const struct nf_conntrack_tuple *orig)
29 {
30         tuple->src.u.all = 0;
31         tuple->dst.u.all = 0;
32
33         return 1;
34 }
35
36 /* Print out the per-protocol part of the tuple. */
37 static int generic_print_tuple(struct seq_file *s,
38                                const struct nf_conntrack_tuple *tuple)
39 {
40         return 0;
41 }
42
43 /* Print out the private part of the conntrack. */
44 static int generic_print_conntrack(struct seq_file *s,
45                                    const struct nf_conn *state)
46 {
47         return 0;
48 }
49
50 /* Returns verdict for packet, or -1 for invalid. */
51 static int packet(struct nf_conn *conntrack,
52                   const struct sk_buff *skb,
53                   unsigned int dataoff,
54                   enum ip_conntrack_info ctinfo,
55                   int pf,
56                   unsigned int hooknum)
57 {
58         nf_ct_refresh_acct(conntrack, ctinfo, skb, nf_ct_generic_timeout);
59         return NF_ACCEPT;
60 }
61
62 /* Called when a new connection for this protocol found. */
63 static int new(struct nf_conn *conntrack, const struct sk_buff *skb,
64                unsigned int dataoff)
65 {
66         return 1;
67 }
68
69 #ifdef CONFIG_SYSCTL
70 static struct ctl_table_header *generic_sysctl_header;
71 static struct ctl_table generic_sysctl_table[] = {
72         {
73                 .ctl_name       = NET_NF_CONNTRACK_GENERIC_TIMEOUT,
74                 .procname       = "nf_conntrack_generic_timeout",
75                 .data           = &nf_ct_generic_timeout,
76                 .maxlen         = sizeof(unsigned int),
77                 .mode           = 0644,
78                 .proc_handler   = &proc_dointvec_jiffies,
79         },
80         {
81                 .ctl_name       = 0
82         }
83 };
84 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
85 static struct ctl_table generic_compat_sysctl_table[] = {
86         {
87                 .ctl_name       = NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT,
88                 .procname       = "ip_conntrack_generic_timeout",
89                 .data           = &nf_ct_generic_timeout,
90                 .maxlen         = sizeof(unsigned int),
91                 .mode           = 0644,
92                 .proc_handler   = &proc_dointvec_jiffies,
93         },
94         {
95                 .ctl_name       = 0
96         }
97 };
98 #endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
99 #endif /* CONFIG_SYSCTL */
100
101 struct nf_conntrack_l4proto nf_conntrack_l4proto_generic __read_mostly =
102 {
103         .l3proto                = PF_UNSPEC,
104         .l4proto                = 0,
105         .name                   = "unknown",
106         .pkt_to_tuple           = generic_pkt_to_tuple,
107         .invert_tuple           = generic_invert_tuple,
108         .print_tuple            = generic_print_tuple,
109         .print_conntrack        = generic_print_conntrack,
110         .packet                 = packet,
111         .new                    = new,
112 #ifdef CONFIG_SYSCTL
113         .ctl_table_header       = &generic_sysctl_header,
114         .ctl_table              = generic_sysctl_table,
115 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
116         .ctl_compat_table       = generic_compat_sysctl_table,
117 #endif
118 #endif
119 };