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
generic_pkt_to_tuple(const struct sk_buff * skb,unsigned int dataoff,struct nf_conntrack_tuple * tuple)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
generic_invert_tuple(struct nf_conntrack_tuple * tuple,const struct nf_conntrack_tuple * orig)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. */
generic_print_tuple(struct seq_file * s,const struct nf_conntrack_tuple * 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. */
packet(struct nf_conn * ct,const struct sk_buff * skb,unsigned int dataoff,enum ip_conntrack_info ctinfo,u_int8_t pf,unsigned int hooknum)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. */
new(struct nf_conn * ct,const struct sk_buff * skb,unsigned int dataoff)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 };
74 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
75 static struct ctl_table generic_compat_sysctl_table[] = {
76 {
77 .procname = "ip_conntrack_generic_timeout",
78 .data = &nf_ct_generic_timeout,
79 .maxlen = sizeof(unsigned int),
80 .mode = 0644,
81 .proc_handler = proc_dointvec_jiffies,
82 },
83 { }
84 };
85 #endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
86 #endif /* CONFIG_SYSCTL */
87
88 struct nf_conntrack_l4proto nf_conntrack_l4proto_generic __read_mostly =
89 {
90 .l3proto = PF_UNSPEC,
91 .l4proto = 255,
92 .name = "unknown",
93 .pkt_to_tuple = generic_pkt_to_tuple,
94 .invert_tuple = generic_invert_tuple,
95 .print_tuple = generic_print_tuple,
96 .packet = packet,
97 .new = new,
98 #ifdef CONFIG_SYSCTL
99 .ctl_table_header = &generic_sysctl_header,
100 .ctl_table = generic_sysctl_table,
101 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
102 .ctl_compat_table = generic_compat_sysctl_table,
103 #endif
104 #endif
105 };
106