1 // SPDX-License-Identifier: GPL-2.0-only
3 * "security" table for IPv6
5 * This is for use by Mandatory Access Control (MAC) security models,
6 * which need to be able to manage security policy in separate context
9 * Based on iptable_mangle.c
11 * Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
12 * Copyright (C) 2000-2004 Netfilter Core Team <coreteam <at> netfilter.org>
13 * Copyright (C) 2008 Red Hat, Inc., James Morris <jmorris <at> redhat.com>
15 #include <linux/module.h>
16 #include <linux/netfilter_ipv6/ip6_tables.h>
17 #include <linux/slab.h>
19 MODULE_LICENSE("GPL");
20 MODULE_AUTHOR("James Morris <jmorris <at> redhat.com>");
21 MODULE_DESCRIPTION("ip6tables security table, for MAC rules");
23 #define SECURITY_VALID_HOOKS (1 << NF_INET_LOCAL_IN) | \
24 (1 << NF_INET_FORWARD) | \
25 (1 << NF_INET_LOCAL_OUT)
27 static int __net_init ip6table_security_table_init(struct net *net);
29 static const struct xt_table security_table = {
31 .valid_hooks = SECURITY_VALID_HOOKS,
34 .priority = NF_IP6_PRI_SECURITY,
35 .table_init = ip6table_security_table_init,
39 ip6table_security_hook(void *priv, struct sk_buff *skb,
40 const struct nf_hook_state *state)
42 return ip6t_do_table(skb, state, state->net->ipv6.ip6table_security);
45 static struct nf_hook_ops *sectbl_ops __read_mostly;
47 static int __net_init ip6table_security_table_init(struct net *net)
49 struct ip6t_replace *repl;
52 if (net->ipv6.ip6table_security)
55 repl = ip6t_alloc_initial_table(&security_table);
58 ret = ip6t_register_table(net, &security_table, repl, sectbl_ops,
59 &net->ipv6.ip6table_security);
64 static void __net_exit ip6table_security_net_exit(struct net *net)
66 if (!net->ipv6.ip6table_security)
68 ip6t_unregister_table(net, net->ipv6.ip6table_security, sectbl_ops);
69 net->ipv6.ip6table_security = NULL;
72 static struct pernet_operations ip6table_security_net_ops = {
73 .exit = ip6table_security_net_exit,
76 static int __init ip6table_security_init(void)
80 sectbl_ops = xt_hook_ops_alloc(&security_table, ip6table_security_hook);
81 if (IS_ERR(sectbl_ops))
82 return PTR_ERR(sectbl_ops);
84 ret = register_pernet_subsys(&ip6table_security_net_ops);
90 ret = ip6table_security_table_init(&init_net);
92 unregister_pernet_subsys(&ip6table_security_net_ops);
98 static void __exit ip6table_security_fini(void)
100 unregister_pernet_subsys(&ip6table_security_net_ops);
104 module_init(ip6table_security_init);
105 module_exit(ip6table_security_fini);