1 // SPDX-License-Identifier: GPL-2.0-only
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_ipv4/ip_tables.h>
17 #include <linux/slab.h>
20 MODULE_LICENSE("GPL");
21 MODULE_AUTHOR("James Morris <jmorris <at> redhat.com>");
22 MODULE_DESCRIPTION("iptables security table, for MAC rules");
24 #define SECURITY_VALID_HOOKS (1 << NF_INET_LOCAL_IN) | \
25 (1 << NF_INET_FORWARD) | \
26 (1 << NF_INET_LOCAL_OUT)
28 static const struct xt_table security_table = {
30 .valid_hooks = SECURITY_VALID_HOOKS,
33 .priority = NF_IP_PRI_SECURITY,
36 static struct nf_hook_ops *sectbl_ops __read_mostly;
38 static int iptable_security_table_init(struct net *net)
40 struct ipt_replace *repl;
43 repl = ipt_alloc_initial_table(&security_table);
46 ret = ipt_register_table(net, &security_table, repl, sectbl_ops);
51 static void __net_exit iptable_security_net_pre_exit(struct net *net)
53 ipt_unregister_table_pre_exit(net, "security");
56 static void __net_exit iptable_security_net_exit(struct net *net)
58 ipt_unregister_table_exit(net, "security");
61 static struct pernet_operations iptable_security_net_ops = {
62 .pre_exit = iptable_security_net_pre_exit,
63 .exit = iptable_security_net_exit,
66 static int __init iptable_security_init(void)
68 int ret = xt_register_template(&security_table,
69 iptable_security_table_init);
74 sectbl_ops = xt_hook_ops_alloc(&security_table, ipt_do_table);
75 if (IS_ERR(sectbl_ops)) {
76 xt_unregister_template(&security_table);
77 return PTR_ERR(sectbl_ops);
80 ret = register_pernet_subsys(&iptable_security_net_ops);
82 xt_unregister_template(&security_table);
90 static void __exit iptable_security_fini(void)
92 unregister_pernet_subsys(&iptable_security_net_ops);
94 xt_unregister_template(&security_table);
97 module_init(iptable_security_init);
98 module_exit(iptable_security_fini);