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
12static 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. */
21static unsigned int
22ip6table_raw_hook(const struct nf_hook_ops *ops, struct sk_buff *skb,
23		  const struct nf_hook_state *state)
24{
25	const struct net *net = dev_net(state->in ? state->in : state->out);
26
27	return ip6t_do_table(skb, ops->hooknum, state, net->ipv6.ip6table_raw);
28}
29
30static struct nf_hook_ops *rawtable_ops __read_mostly;
31
32static int __net_init ip6table_raw_net_init(struct net *net)
33{
34	struct ip6t_replace *repl;
35
36	repl = ip6t_alloc_initial_table(&packet_raw);
37	if (repl == NULL)
38		return -ENOMEM;
39	net->ipv6.ip6table_raw =
40		ip6t_register_table(net, &packet_raw, repl);
41	kfree(repl);
42	return PTR_ERR_OR_ZERO(net->ipv6.ip6table_raw);
43}
44
45static void __net_exit ip6table_raw_net_exit(struct net *net)
46{
47	ip6t_unregister_table(net, net->ipv6.ip6table_raw);
48}
49
50static struct pernet_operations ip6table_raw_net_ops = {
51	.init = ip6table_raw_net_init,
52	.exit = ip6table_raw_net_exit,
53};
54
55static int __init ip6table_raw_init(void)
56{
57	int ret;
58
59	ret = register_pernet_subsys(&ip6table_raw_net_ops);
60	if (ret < 0)
61		return ret;
62
63	/* Register hooks */
64	rawtable_ops = xt_hook_link(&packet_raw, ip6table_raw_hook);
65	if (IS_ERR(rawtable_ops)) {
66		ret = PTR_ERR(rawtable_ops);
67		goto cleanup_table;
68	}
69
70	return ret;
71
72 cleanup_table:
73	unregister_pernet_subsys(&ip6table_raw_net_ops);
74	return ret;
75}
76
77static void __exit ip6table_raw_fini(void)
78{
79	xt_hook_unlink(&packet_raw, rawtable_ops);
80	unregister_pernet_subsys(&ip6table_raw_net_ops);
81}
82
83module_init(ip6table_raw_init);
84module_exit(ip6table_raw_fini);
85MODULE_LICENSE("GPL");
86