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9fb9cbb1 YK |
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 | * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp> | |
9 | * - enable working with L3 protocol independent connection tracking. | |
10 | * | |
11 | * Derived from net/ipv4/netfilter/ip_conntrack_proto_generic.c | |
12 | */ | |
13 | ||
14 | #include <linux/types.h> | |
15 | #include <linux/sched.h> | |
16 | #include <linux/timer.h> | |
17 | #include <linux/netfilter.h> | |
605dcad6 | 18 | #include <net/netfilter/nf_conntrack_l4proto.h> |
9fb9cbb1 | 19 | |
933a41e7 | 20 | static unsigned int nf_ct_generic_timeout __read_mostly = 600*HZ; |
9fb9cbb1 YK |
21 | |
22 | static int generic_pkt_to_tuple(const struct sk_buff *skb, | |
23 | unsigned int dataoff, | |
24 | struct nf_conntrack_tuple *tuple) | |
25 | { | |
26 | tuple->src.u.all = 0; | |
27 | tuple->dst.u.all = 0; | |
28 | ||
29 | return 1; | |
30 | } | |
31 | ||
32 | static int generic_invert_tuple(struct nf_conntrack_tuple *tuple, | |
33 | const struct nf_conntrack_tuple *orig) | |
34 | { | |
35 | tuple->src.u.all = 0; | |
36 | tuple->dst.u.all = 0; | |
37 | ||
38 | return 1; | |
39 | } | |
40 | ||
41 | /* Print out the per-protocol part of the tuple. */ | |
42 | static int generic_print_tuple(struct seq_file *s, | |
43 | const struct nf_conntrack_tuple *tuple) | |
44 | { | |
45 | return 0; | |
46 | } | |
47 | ||
48 | /* Print out the private part of the conntrack. */ | |
49 | static int generic_print_conntrack(struct seq_file *s, | |
50 | const struct nf_conn *state) | |
51 | { | |
52 | return 0; | |
53 | } | |
54 | ||
55 | /* Returns verdict for packet, or -1 for invalid. */ | |
56 | static int packet(struct nf_conn *conntrack, | |
57 | const struct sk_buff *skb, | |
58 | unsigned int dataoff, | |
59 | enum ip_conntrack_info ctinfo, | |
60 | int pf, | |
61 | unsigned int hooknum) | |
62 | { | |
63 | nf_ct_refresh_acct(conntrack, ctinfo, skb, nf_ct_generic_timeout); | |
64 | return NF_ACCEPT; | |
65 | } | |
66 | ||
67 | /* Called when a new connection for this protocol found. */ | |
68 | static int new(struct nf_conn *conntrack, const struct sk_buff *skb, | |
69 | unsigned int dataoff) | |
70 | { | |
71 | return 1; | |
72 | } | |
73 | ||
933a41e7 PM |
74 | #ifdef CONFIG_SYSCTL |
75 | static struct ctl_table_header *generic_sysctl_header; | |
76 | static struct ctl_table generic_sysctl_table[] = { | |
77 | { | |
78 | .ctl_name = NET_NF_CONNTRACK_GENERIC_TIMEOUT, | |
79 | .procname = "nf_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 | }; | |
a999e683 PM |
89 | #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT |
90 | static struct ctl_table generic_compat_sysctl_table[] = { | |
91 | { | |
92 | .ctl_name = NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT, | |
93 | .procname = "ip_conntrack_generic_timeout", | |
94 | .data = &nf_ct_generic_timeout, | |
95 | .maxlen = sizeof(unsigned int), | |
96 | .mode = 0644, | |
97 | .proc_handler = &proc_dointvec_jiffies, | |
98 | }, | |
99 | { | |
100 | .ctl_name = 0 | |
101 | } | |
102 | }; | |
103 | #endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */ | |
933a41e7 PM |
104 | #endif /* CONFIG_SYSCTL */ |
105 | ||
605dcad6 | 106 | struct nf_conntrack_l4proto nf_conntrack_l4proto_generic = |
9fb9cbb1 YK |
107 | { |
108 | .l3proto = PF_UNSPEC, | |
605dcad6 | 109 | .l4proto = 0, |
9fb9cbb1 YK |
110 | .name = "unknown", |
111 | .pkt_to_tuple = generic_pkt_to_tuple, | |
112 | .invert_tuple = generic_invert_tuple, | |
113 | .print_tuple = generic_print_tuple, | |
114 | .print_conntrack = generic_print_conntrack, | |
115 | .packet = packet, | |
116 | .new = new, | |
933a41e7 PM |
117 | #ifdef CONFIG_SYSCTL |
118 | .ctl_table_header = &generic_sysctl_header, | |
119 | .ctl_table = generic_sysctl_table, | |
a999e683 PM |
120 | #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT |
121 | .ctl_compat_table = generic_compat_sysctl_table, | |
122 | #endif | |
933a41e7 | 123 | #endif |
9fb9cbb1 | 124 | }; |