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Commit | Line | Data |
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17e6e59f JM |
1 | /* |
2 | * "security" table for IPv6 | |
3 | * | |
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 | |
6 | * to DAC. | |
7 | * | |
8 | * Based on iptable_mangle.c | |
9 | * | |
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> | |
13 | * | |
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. | |
17 | */ | |
18 | #include <linux/module.h> | |
19 | #include <linux/netfilter_ipv6/ip6_tables.h> | |
5a0e3ad6 | 20 | #include <linux/slab.h> |
17e6e59f JM |
21 | |
22 | MODULE_LICENSE("GPL"); | |
23 | MODULE_AUTHOR("James Morris <jmorris <at> redhat.com>"); | |
24 | MODULE_DESCRIPTION("ip6tables security table, for MAC rules"); | |
25 | ||
26 | #define SECURITY_VALID_HOOKS (1 << NF_INET_LOCAL_IN) | \ | |
27 | (1 << NF_INET_FORWARD) | \ | |
28 | (1 << NF_INET_LOCAL_OUT) | |
29 | ||
35aad0ff | 30 | static const struct xt_table security_table = { |
17e6e59f JM |
31 | .name = "security", |
32 | .valid_hooks = SECURITY_VALID_HOOKS, | |
17e6e59f | 33 | .me = THIS_MODULE, |
f88e6a8a | 34 | .af = NFPROTO_IPV6, |
2b95efe7 | 35 | .priority = NF_IP6_PRI_SECURITY, |
17e6e59f JM |
36 | }; |
37 | ||
38 | static unsigned int | |
737535c5 JE |
39 | ip6table_security_hook(unsigned int hook, struct sk_buff *skb, |
40 | const struct net_device *in, | |
41 | const struct net_device *out, | |
42 | int (*okfn)(struct sk_buff *)) | |
17e6e59f | 43 | { |
2b21e051 | 44 | const struct net *net = dev_net((in != NULL) ? in : out); |
17e6e59f | 45 | |
2b21e051 | 46 | return ip6t_do_table(skb, hook, in, out, net->ipv6.ip6table_security); |
17e6e59f JM |
47 | } |
48 | ||
2b95efe7 | 49 | static struct nf_hook_ops *sectbl_ops __read_mostly; |
17e6e59f JM |
50 | |
51 | static int __net_init ip6table_security_net_init(struct net *net) | |
52 | { | |
e3eaa991 | 53 | struct ip6t_replace *repl; |
17e6e59f | 54 | |
e3eaa991 JE |
55 | repl = ip6t_alloc_initial_table(&security_table); |
56 | if (repl == NULL) | |
57 | return -ENOMEM; | |
58 | net->ipv6.ip6table_security = | |
59 | ip6t_register_table(net, &security_table, repl); | |
60 | kfree(repl); | |
17e6e59f JM |
61 | if (IS_ERR(net->ipv6.ip6table_security)) |
62 | return PTR_ERR(net->ipv6.ip6table_security); | |
63 | ||
64 | return 0; | |
65 | } | |
66 | ||
67 | static void __net_exit ip6table_security_net_exit(struct net *net) | |
68 | { | |
f54e9367 | 69 | ip6t_unregister_table(net, net->ipv6.ip6table_security); |
17e6e59f JM |
70 | } |
71 | ||
72 | static struct pernet_operations ip6table_security_net_ops = { | |
73 | .init = ip6table_security_net_init, | |
74 | .exit = ip6table_security_net_exit, | |
75 | }; | |
76 | ||
77 | static int __init ip6table_security_init(void) | |
78 | { | |
79 | int ret; | |
80 | ||
81 | ret = register_pernet_subsys(&ip6table_security_net_ops); | |
82 | if (ret < 0) | |
83 | return ret; | |
84 | ||
2b95efe7 JE |
85 | sectbl_ops = xt_hook_link(&security_table, ip6table_security_hook); |
86 | if (IS_ERR(sectbl_ops)) { | |
87 | ret = PTR_ERR(sectbl_ops); | |
17e6e59f | 88 | goto cleanup_table; |
2b95efe7 | 89 | } |
17e6e59f JM |
90 | |
91 | return ret; | |
92 | ||
93 | cleanup_table: | |
94 | unregister_pernet_subsys(&ip6table_security_net_ops); | |
95 | return ret; | |
96 | } | |
97 | ||
98 | static void __exit ip6table_security_fini(void) | |
99 | { | |
2b95efe7 | 100 | xt_hook_unlink(&security_table, sectbl_ops); |
17e6e59f JM |
101 | unregister_pernet_subsys(&ip6table_security_net_ops); |
102 | } | |
103 | ||
104 | module_init(ip6table_security_init); | |
105 | module_exit(ip6table_security_fini); |