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>
21 MODULE_LICENSE("GPL");
22 MODULE_AUTHOR("James Morris <jmorris <at> redhat.com>");
23 MODULE_DESCRIPTION("ip6tables security table, for MAC rules");
25 #define SECURITY_VALID_HOOKS (1 << NF_INET_LOCAL_IN) | \
26 (1 << NF_INET_FORWARD) | \
27 (1 << NF_INET_LOCAL_OUT)
31 struct ip6t_replace repl;
32 struct ip6t_standard entries[3];
33 struct ip6t_error term;
34 } initial_table __net_initdata = {
37 .valid_hooks = SECURITY_VALID_HOOKS,
39 .size = sizeof(struct ip6t_standard) * 3 + sizeof(struct ip6t_error),
41 [NF_INET_LOCAL_IN] = 0,
42 [NF_INET_FORWARD] = sizeof(struct ip6t_standard),
43 [NF_INET_LOCAL_OUT] = sizeof(struct ip6t_standard) * 2,
46 [NF_INET_LOCAL_IN] = 0,
47 [NF_INET_FORWARD] = sizeof(struct ip6t_standard),
48 [NF_INET_LOCAL_OUT] = sizeof(struct ip6t_standard) * 2,
52 IP6T_STANDARD_INIT(NF_ACCEPT), /* LOCAL_IN */
53 IP6T_STANDARD_INIT(NF_ACCEPT), /* FORWARD */
54 IP6T_STANDARD_INIT(NF_ACCEPT), /* LOCAL_OUT */
56 .term = IP6T_ERROR_INIT, /* ERROR */
59 static const struct xt_table security_table = {
61 .valid_hooks = SECURITY_VALID_HOOKS,
67 ip6table_security_hook(unsigned int hook, struct sk_buff *skb,
68 const struct net_device *in,
69 const struct net_device *out,
70 int (*okfn)(struct sk_buff *))
72 if (hook == NF_INET_LOCAL_OUT)
73 return ip6t_do_table(skb, hook, in, out,
74 dev_net(out)->ipv6.ip6table_security);
77 return ip6t_do_table(skb, hook, in, out,
78 dev_net(in)->ipv6.ip6table_security);
81 static struct nf_hook_ops ip6t_ops[] __read_mostly = {
83 .hook = ip6table_security_hook,
86 .hooknum = NF_INET_LOCAL_IN,
87 .priority = NF_IP6_PRI_SECURITY,
90 .hook = ip6table_security_hook,
93 .hooknum = NF_INET_FORWARD,
94 .priority = NF_IP6_PRI_SECURITY,
97 .hook = ip6table_security_hook,
100 .hooknum = NF_INET_LOCAL_OUT,
101 .priority = NF_IP6_PRI_SECURITY,
105 static int __net_init ip6table_security_net_init(struct net *net)
107 net->ipv6.ip6table_security =
108 ip6t_register_table(net, &security_table, &initial_table.repl);
110 if (IS_ERR(net->ipv6.ip6table_security))
111 return PTR_ERR(net->ipv6.ip6table_security);
116 static void __net_exit ip6table_security_net_exit(struct net *net)
118 ip6t_unregister_table(net, net->ipv6.ip6table_security);
121 static struct pernet_operations ip6table_security_net_ops = {
122 .init = ip6table_security_net_init,
123 .exit = ip6table_security_net_exit,
126 static int __init ip6table_security_init(void)
130 ret = register_pernet_subsys(&ip6table_security_net_ops);
134 ret = nf_register_hooks(ip6t_ops, ARRAY_SIZE(ip6t_ops));
141 unregister_pernet_subsys(&ip6table_security_net_ops);
145 static void __exit ip6table_security_fini(void)
147 nf_unregister_hooks(ip6t_ops, ARRAY_SIZE(ip6t_ops));
148 unregister_pernet_subsys(&ip6table_security_net_ops);
151 module_init(ip6table_security_init);
152 module_exit(ip6table_security_fini);