4be80d7b87958253f16e86bc550686544e06385d
[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 bool 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 true;
25 }
26
27 static bool 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 true;
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 /* Returns verdict for packet, or -1 for invalid. */
44 static int packet(struct nf_conn *ct,
45                   const struct sk_buff *skb,
46                   unsigned int dataoff,
47                   enum ip_conntrack_info ctinfo,
48                   u_int8_t pf,
49                   unsigned int hooknum)
50 {
51         nf_ct_refresh_acct(ct, ctinfo, skb, nf_ct_generic_timeout);
52         return NF_ACCEPT;
53 }
54
55 /* Called when a new connection for this protocol found. */
56 static bool new(struct nf_conn *ct, const struct sk_buff *skb,
57                 unsigned int dataoff)
58 {
59         return true;
60 }
61
62 #ifdef CONFIG_SYSCTL
63 static struct ctl_table_header *generic_sysctl_header;
64 static struct ctl_table generic_sysctl_table[] = {
65         {
66                 .procname       = "nf_conntrack_generic_timeout",
67                 .data           = &nf_ct_generic_timeout,
68                 .maxlen         = sizeof(unsigned int),
69                 .mode           = 0644,
70                 .proc_handler   = proc_dointvec_jiffies,
71         },
72         {
73                 .ctl_name       = 0
74         }
75 };
76 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
77 static struct ctl_table generic_compat_sysctl_table[] = {
78         {
79                 .procname       = "ip_conntrack_generic_timeout",
80                 .data           = &nf_ct_generic_timeout,
81                 .maxlen         = sizeof(unsigned int),
82                 .mode           = 0644,
83                 .proc_handler   = proc_dointvec_jiffies,
84         },
85         {
86                 .ctl_name       = 0
87         }
88 };
89 #endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
90 #endif /* CONFIG_SYSCTL */
91
92 struct nf_conntrack_l4proto nf_conntrack_l4proto_generic __read_mostly =
93 {
94         .l3proto                = PF_UNSPEC,
95         .l4proto                = 0,
96         .name                   = "unknown",
97         .pkt_to_tuple           = generic_pkt_to_tuple,
98         .invert_tuple           = generic_invert_tuple,
99         .print_tuple            = generic_print_tuple,
100         .packet                 = packet,
101         .new                    = new,
102 #ifdef CONFIG_SYSCTL
103         .ctl_table_header       = &generic_sysctl_header,
104         .ctl_table              = generic_sysctl_table,
105 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
106         .ctl_compat_table       = generic_compat_sysctl_table,
107 #endif
108 #endif
109 };