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(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
28static struct nf_hook_ops *rawtable_ops __read_mostly;
29
30static 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
43static void __net_exit ip6table_raw_net_exit(struct net *net)
44{
45	ip6t_unregister_table(net, net->ipv6.ip6table_raw);
46}
47
48static struct pernet_operations ip6table_raw_net_ops = {
49	.init = ip6table_raw_net_init,
50	.exit = ip6table_raw_net_exit,
51};
52
53static 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
75static 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
81module_init(ip6table_raw_init);
82module_exit(ip6table_raw_fini);
83MODULE_LICENSE("GPL");
84