[NETFILTER]: x_tables: return new table from {arp,ip,ip6}t_register_table()
[linux-2.6.git] / net / ipv6 / netfilter / ip6table_raw.c
1 /*
2  * IPv6 raw table, a port of the IPv4 raw table to IPv6
3  *
4  * Copyright (C) 2003 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
5  */
6 #include <linux/module.h>
7 #include <linux/netfilter_ipv6/ip6_tables.h>
8
9 #define RAW_VALID_HOOKS ((1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT))
10
11 static struct
12 {
13         struct ip6t_replace repl;
14         struct ip6t_standard entries[2];
15         struct ip6t_error term;
16 } initial_table __initdata = {
17         .repl = {
18                 .name = "raw",
19                 .valid_hooks = RAW_VALID_HOOKS,
20                 .num_entries = 3,
21                 .size = sizeof(struct ip6t_standard) * 2 + sizeof(struct ip6t_error),
22                 .hook_entry = {
23                         [NF_INET_PRE_ROUTING] = 0,
24                         [NF_INET_LOCAL_OUT] = sizeof(struct ip6t_standard)
25                 },
26                 .underflow = {
27                         [NF_INET_PRE_ROUTING] = 0,
28                         [NF_INET_LOCAL_OUT] = sizeof(struct ip6t_standard)
29                 },
30         },
31         .entries = {
32                 IP6T_STANDARD_INIT(NF_ACCEPT),  /* PRE_ROUTING */
33                 IP6T_STANDARD_INIT(NF_ACCEPT),  /* LOCAL_OUT */
34         },
35         .term = IP6T_ERROR_INIT,                /* ERROR */
36 };
37
38 static struct xt_table __packet_raw = {
39         .name = "raw",
40         .valid_hooks = RAW_VALID_HOOKS,
41         .lock = RW_LOCK_UNLOCKED,
42         .me = THIS_MODULE,
43         .af = AF_INET6,
44 };
45 static struct xt_table *packet_raw;
46
47 /* The work comes in here from netfilter.c. */
48 static unsigned int
49 ip6t_hook(unsigned int hook,
50          struct sk_buff *skb,
51          const struct net_device *in,
52          const struct net_device *out,
53          int (*okfn)(struct sk_buff *))
54 {
55         return ip6t_do_table(skb, hook, in, out, packet_raw);
56 }
57
58 static struct nf_hook_ops ip6t_ops[] __read_mostly = {
59         {
60           .hook = ip6t_hook,
61           .pf = PF_INET6,
62           .hooknum = NF_INET_PRE_ROUTING,
63           .priority = NF_IP6_PRI_FIRST,
64           .owner = THIS_MODULE,
65         },
66         {
67           .hook = ip6t_hook,
68           .pf = PF_INET6,
69           .hooknum = NF_INET_LOCAL_OUT,
70           .priority = NF_IP6_PRI_FIRST,
71           .owner = THIS_MODULE,
72         },
73 };
74
75 static int __init ip6table_raw_init(void)
76 {
77         int ret;
78
79         /* Register table */
80         packet_raw = ip6t_register_table(&__packet_raw, &initial_table.repl);
81         if (IS_ERR(packet_raw))
82                 return PTR_ERR(packet_raw);
83
84         /* Register hooks */
85         ret = nf_register_hooks(ip6t_ops, ARRAY_SIZE(ip6t_ops));
86         if (ret < 0)
87                 goto cleanup_table;
88
89         return ret;
90
91  cleanup_table:
92         ip6t_unregister_table(packet_raw);
93         return ret;
94 }
95
96 static void __exit ip6table_raw_fini(void)
97 {
98         nf_unregister_hooks(ip6t_ops, ARRAY_SIZE(ip6t_ops));
99         ip6t_unregister_table(packet_raw);
100 }
101
102 module_init(ip6table_raw_init);
103 module_exit(ip6table_raw_fini);
104 MODULE_LICENSE("GPL");