2 * "security" table for IPv6
4 * This is for use by Mandatory Access Control (MAC) security models,
5 * which need to be able to manage security policy in separate context
8 * Based on iptable_mangle.c
10 * Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
11 * Copyright (C) 2000-2004 Netfilter Core Team <coreteam <at> netfilter.org>
12 * Copyright (C) 2008 Red Hat, Inc., James Morris <jmorris <at> redhat.com>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
18 #include <linux/module.h>
19 #include <linux/netfilter_ipv6/ip6_tables.h>
20 #include <linux/slab.h>
22 MODULE_LICENSE("GPL");
23 MODULE_AUTHOR("James Morris <jmorris <at> redhat.com>");
24 MODULE_DESCRIPTION("ip6tables security table, for MAC rules");
26 #define SECURITY_VALID_HOOKS (1 << NF_INET_LOCAL_IN) | \
27 (1 << NF_INET_FORWARD) | \
28 (1 << NF_INET_LOCAL_OUT)
30 static const struct xt_table security_table = {
32 .valid_hooks = SECURITY_VALID_HOOKS,
35 .priority = NF_IP6_PRI_SECURITY,
39 ip6table_security_hook(const struct nf_hook_ops *ops, struct sk_buff *skb,
40 const struct net_device *in,
41 const struct net_device *out,
42 int (*okfn)(struct sk_buff *))
44 const struct net *net = dev_net((in != NULL) ? in : out);
46 return ip6t_do_table(skb, ops->hooknum, in, out,
47 net->ipv6.ip6table_security);
50 static struct nf_hook_ops *sectbl_ops __read_mostly;
52 static int __net_init ip6table_security_net_init(struct net *net)
54 struct ip6t_replace *repl;
56 repl = ip6t_alloc_initial_table(&security_table);
59 net->ipv6.ip6table_security =
60 ip6t_register_table(net, &security_table, repl);
62 return PTR_ERR_OR_ZERO(net->ipv6.ip6table_security);
65 static void __net_exit ip6table_security_net_exit(struct net *net)
67 ip6t_unregister_table(net, net->ipv6.ip6table_security);
70 static struct pernet_operations ip6table_security_net_ops = {
71 .init = ip6table_security_net_init,
72 .exit = ip6table_security_net_exit,
75 static int __init ip6table_security_init(void)
79 ret = register_pernet_subsys(&ip6table_security_net_ops);
83 sectbl_ops = xt_hook_link(&security_table, ip6table_security_hook);
84 if (IS_ERR(sectbl_ops)) {
85 ret = PTR_ERR(sectbl_ops);
92 unregister_pernet_subsys(&ip6table_security_net_ops);
96 static void __exit ip6table_security_fini(void)
98 xt_hook_unlink(&security_table, sectbl_ops);
99 unregister_pernet_subsys(&ip6table_security_net_ops);
102 module_init(ip6table_security_init);
103 module_exit(ip6table_security_fini);