added 2.6.29.6 aldebaran kernel
[nao-ulib.git] / kernel / 2.6.29.6-aldebaran-rt / net / bridge / netfilter / ebtable_broute.c
blob8604dfc1fc3be0f2c36f6b84b3bceecb930cdfba
1 /*
2 * ebtable_broute
4 * Authors:
5 * Bart De Schuymer <bdschuym@pandora.be>
7 * April, 2002
9 * This table lets you choose between routing and bridging for frames
10 * entering on a bridge enslaved nic. This table is traversed before any
11 * other ebtables table. See net/bridge/br_input.c.
14 #include <linux/netfilter_bridge/ebtables.h>
15 #include <linux/module.h>
16 #include <linux/if_bridge.h>
18 /* EBT_ACCEPT means the frame will be bridged
19 * EBT_DROP means the frame will be routed
21 static struct ebt_entries initial_chain = {
22 .name = "BROUTING",
23 .policy = EBT_ACCEPT,
26 static struct ebt_replace_kernel initial_table =
28 .name = "broute",
29 .valid_hooks = 1 << NF_BR_BROUTING,
30 .entries_size = sizeof(struct ebt_entries),
31 .hook_entry = {
32 [NF_BR_BROUTING] = &initial_chain,
34 .entries = (char *)&initial_chain,
37 static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
39 if (valid_hooks & ~(1 << NF_BR_BROUTING))
40 return -EINVAL;
41 return 0;
44 static struct ebt_table broute_table =
46 .name = "broute",
47 .table = &initial_table,
48 .valid_hooks = 1 << NF_BR_BROUTING,
49 .lock = __RW_LOCK_UNLOCKED(broute_table.lock),
50 .check = check,
51 .me = THIS_MODULE,
54 static int ebt_broute(struct sk_buff *skb)
56 int ret;
58 ret = ebt_do_table(NF_BR_BROUTING, skb, skb->dev, NULL,
59 dev_net(skb->dev)->xt.broute_table);
60 if (ret == NF_DROP)
61 return 1; /* route it */
62 return 0; /* bridge it */
65 static int __net_init broute_net_init(struct net *net)
67 net->xt.broute_table = ebt_register_table(net, &broute_table);
68 if (IS_ERR(net->xt.broute_table))
69 return PTR_ERR(net->xt.broute_table);
70 return 0;
73 static void __net_exit broute_net_exit(struct net *net)
75 ebt_unregister_table(net->xt.broute_table);
78 static struct pernet_operations broute_net_ops = {
79 .init = broute_net_init,
80 .exit = broute_net_exit,
83 static int __init ebtable_broute_init(void)
85 int ret;
87 ret = register_pernet_subsys(&broute_net_ops);
88 if (ret < 0)
89 return ret;
90 /* see br_input.c */
91 rcu_assign_pointer(br_should_route_hook, ebt_broute);
92 return 0;
95 static void __exit ebtable_broute_fini(void)
97 rcu_assign_pointer(br_should_route_hook, NULL);
98 synchronize_net();
99 unregister_pernet_subsys(&broute_net_ops);
102 module_init(ebtable_broute_init);
103 module_exit(ebtable_broute_fini);
104 MODULE_LICENSE("GPL");