This source file includes following definitions.
- ip6table_security_hook
- ip6table_security_table_init
- ip6table_security_net_exit
- ip6table_security_init
- ip6table_security_fini
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15 #include <linux/module.h>
16 #include <linux/netfilter_ipv6/ip6_tables.h>
17 #include <linux/slab.h>
18
19 MODULE_LICENSE("GPL");
20 MODULE_AUTHOR("James Morris <jmorris <at> redhat.com>");
21 MODULE_DESCRIPTION("ip6tables security table, for MAC rules");
22
23 #define SECURITY_VALID_HOOKS (1 << NF_INET_LOCAL_IN) | \
24 (1 << NF_INET_FORWARD) | \
25 (1 << NF_INET_LOCAL_OUT)
26
27 static int __net_init ip6table_security_table_init(struct net *net);
28
29 static const struct xt_table security_table = {
30 .name = "security",
31 .valid_hooks = SECURITY_VALID_HOOKS,
32 .me = THIS_MODULE,
33 .af = NFPROTO_IPV6,
34 .priority = NF_IP6_PRI_SECURITY,
35 .table_init = ip6table_security_table_init,
36 };
37
38 static unsigned int
39 ip6table_security_hook(void *priv, struct sk_buff *skb,
40 const struct nf_hook_state *state)
41 {
42 return ip6t_do_table(skb, state, state->net->ipv6.ip6table_security);
43 }
44
45 static struct nf_hook_ops *sectbl_ops __read_mostly;
46
47 static int __net_init ip6table_security_table_init(struct net *net)
48 {
49 struct ip6t_replace *repl;
50 int ret;
51
52 if (net->ipv6.ip6table_security)
53 return 0;
54
55 repl = ip6t_alloc_initial_table(&security_table);
56 if (repl == NULL)
57 return -ENOMEM;
58 ret = ip6t_register_table(net, &security_table, repl, sectbl_ops,
59 &net->ipv6.ip6table_security);
60 kfree(repl);
61 return ret;
62 }
63
64 static void __net_exit ip6table_security_net_exit(struct net *net)
65 {
66 if (!net->ipv6.ip6table_security)
67 return;
68 ip6t_unregister_table(net, net->ipv6.ip6table_security, sectbl_ops);
69 net->ipv6.ip6table_security = NULL;
70 }
71
72 static struct pernet_operations ip6table_security_net_ops = {
73 .exit = ip6table_security_net_exit,
74 };
75
76 static int __init ip6table_security_init(void)
77 {
78 int ret;
79
80 sectbl_ops = xt_hook_ops_alloc(&security_table, ip6table_security_hook);
81 if (IS_ERR(sectbl_ops))
82 return PTR_ERR(sectbl_ops);
83
84 ret = register_pernet_subsys(&ip6table_security_net_ops);
85 if (ret < 0) {
86 kfree(sectbl_ops);
87 return ret;
88 }
89
90 ret = ip6table_security_table_init(&init_net);
91 if (ret) {
92 unregister_pernet_subsys(&ip6table_security_net_ops);
93 kfree(sectbl_ops);
94 }
95 return ret;
96 }
97
98 static void __exit ip6table_security_fini(void)
99 {
100 unregister_pernet_subsys(&ip6table_security_net_ops);
101 kfree(sectbl_ops);
102 }
103
104 module_init(ip6table_security_init);
105 module_exit(ip6table_security_fini);