5 * Bart De Schuymer <bdschuym@pandora.be>
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
= {
26 static struct ebt_replace_kernel initial_table
= {
28 .valid_hooks
= 1 << NF_BR_BROUTING
,
29 .entries_size
= sizeof(struct ebt_entries
),
31 [NF_BR_BROUTING
] = &initial_chain
,
33 .entries
= (char *)&initial_chain
,
36 static int check(const struct ebt_table_info
*info
, unsigned int valid_hooks
)
38 if (valid_hooks
& ~(1 << NF_BR_BROUTING
))
43 static const struct ebt_table broute_table
= {
45 .table
= &initial_table
,
46 .valid_hooks
= 1 << NF_BR_BROUTING
,
51 static int ebt_broute(struct sk_buff
*skb
)
53 struct nf_hook_state state
;
56 nf_hook_state_init(&state
, NULL
, NF_BR_BROUTING
, INT_MIN
,
57 NFPROTO_BRIDGE
, skb
->dev
, NULL
, NULL
,
58 dev_net(skb
->dev
), NULL
);
60 ret
= ebt_do_table(skb
, &state
, state
.net
->xt
.broute_table
);
62 return 1; /* route it */
63 return 0; /* bridge it */
66 static int __net_init
broute_net_init(struct net
*net
)
68 net
->xt
.broute_table
= ebt_register_table(net
, &broute_table
);
69 return PTR_ERR_OR_ZERO(net
->xt
.broute_table
);
72 static void __net_exit
broute_net_exit(struct net
*net
)
74 ebt_unregister_table(net
, net
->xt
.broute_table
);
77 static struct pernet_operations broute_net_ops
= {
78 .init
= broute_net_init
,
79 .exit
= broute_net_exit
,
82 static int __init
ebtable_broute_init(void)
86 ret
= register_pernet_subsys(&broute_net_ops
);
90 RCU_INIT_POINTER(br_should_route_hook
,
91 (br_should_route_hook_t
*)ebt_broute
);
95 static void __exit
ebtable_broute_fini(void)
97 RCU_INIT_POINTER(br_should_route_hook
, NULL
);
99 unregister_pernet_subsys(&broute_net_ops
);
102 module_init(ebtable_broute_init
);
103 module_exit(ebtable_broute_fini
);
104 MODULE_LICENSE("GPL");