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 const struct xt_table security_table = {
29 .valid_hooks = SECURITY_VALID_HOOKS,
32 .priority = NF_IP6_PRI_SECURITY,
36 ip6table_security_hook(void *priv, struct sk_buff *skb,
37 const struct nf_hook_state *state)
39 return ip6t_do_table(skb, state, priv);
42 static struct nf_hook_ops *sectbl_ops __read_mostly;
44 static int ip6table_security_table_init(struct net *net)
46 struct ip6t_replace *repl;
49 repl = ip6t_alloc_initial_table(&security_table);
52 ret = ip6t_register_table(net, &security_table, repl, sectbl_ops);
57 static void __net_exit ip6table_security_net_pre_exit(struct net *net)
59 ip6t_unregister_table_pre_exit(net, "security");
62 static void __net_exit ip6table_security_net_exit(struct net *net)
64 ip6t_unregister_table_exit(net, "security");
67 static struct pernet_operations ip6table_security_net_ops = {
68 .pre_exit = ip6table_security_net_pre_exit,
69 .exit = ip6table_security_net_exit,
72 static int __init ip6table_security_init(void)
74 int ret = xt_register_template(&security_table,
75 ip6table_security_table_init);
80 sectbl_ops = xt_hook_ops_alloc(&security_table, ip6table_security_hook);
81 if (IS_ERR(sectbl_ops)) {
82 xt_unregister_template(&security_table);
83 return PTR_ERR(sectbl_ops);
86 ret = register_pernet_subsys(&ip6table_security_net_ops);
89 xt_unregister_template(&security_table);
96 static void __exit ip6table_security_fini(void)
98 unregister_pernet_subsys(&ip6table_security_net_ops);
99 xt_unregister_template(&security_table);
103 module_init(ip6table_security_init);
104 module_exit(ip6table_security_fini);