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 #include <linux/slab.h>
9
10 #define RAW_VALID_HOOKS ((1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT))
11
12 static const struct xt_table packet_raw = {
13 .name = "raw",
14 .valid_hooks = RAW_VALID_HOOKS,
15 .me = THIS_MODULE,
16 .af = NFPROTO_IPV6,
17 .priority = NF_IP6_PRI_RAW,
18 };
19
20 /* The work comes in here from netfilter.c. */
21 static unsigned int
ip6table_raw_hook(void * priv,struct sk_buff * skb,const struct nf_hook_state * state)22 ip6table_raw_hook(void *priv, struct sk_buff *skb,
23 const struct nf_hook_state *state)
24 {
25 return ip6t_do_table(skb, state, state->net->ipv6.ip6table_raw);
26 }
27
28 static struct nf_hook_ops *rawtable_ops __read_mostly;
29
ip6table_raw_net_init(struct net * net)30 static int __net_init ip6table_raw_net_init(struct net *net)
31 {
32 struct ip6t_replace *repl;
33
34 repl = ip6t_alloc_initial_table(&packet_raw);
35 if (repl == NULL)
36 return -ENOMEM;
37 net->ipv6.ip6table_raw =
38 ip6t_register_table(net, &packet_raw, repl);
39 kfree(repl);
40 return PTR_ERR_OR_ZERO(net->ipv6.ip6table_raw);
41 }
42
ip6table_raw_net_exit(struct net * net)43 static void __net_exit ip6table_raw_net_exit(struct net *net)
44 {
45 ip6t_unregister_table(net, net->ipv6.ip6table_raw);
46 }
47
48 static struct pernet_operations ip6table_raw_net_ops = {
49 .init = ip6table_raw_net_init,
50 .exit = ip6table_raw_net_exit,
51 };
52
ip6table_raw_init(void)53 static int __init ip6table_raw_init(void)
54 {
55 int ret;
56
57 ret = register_pernet_subsys(&ip6table_raw_net_ops);
58 if (ret < 0)
59 return ret;
60
61 /* Register hooks */
62 rawtable_ops = xt_hook_link(&packet_raw, ip6table_raw_hook);
63 if (IS_ERR(rawtable_ops)) {
64 ret = PTR_ERR(rawtable_ops);
65 goto cleanup_table;
66 }
67
68 return ret;
69
70 cleanup_table:
71 unregister_pernet_subsys(&ip6table_raw_net_ops);
72 return ret;
73 }
74
ip6table_raw_fini(void)75 static void __exit ip6table_raw_fini(void)
76 {
77 xt_hook_unlink(&packet_raw, rawtable_ops);
78 unregister_pernet_subsys(&ip6table_raw_net_ops);
79 }
80
81 module_init(ip6table_raw_init);
82 module_exit(ip6table_raw_fini);
83 MODULE_LICENSE("GPL");
84