batman-adv: filter ARP packets with invalid MAC addresses in DAT
[~shefty/rdma-dev.git] / net / batman-adv / hard-interface.h
1 /* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
2  *
3  * Marek Lindner, Simon Wunderlich
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of version 2 of the GNU General Public
7  * License as published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope that it will be useful, but
10  * WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17  * 02110-1301, USA
18  */
19
20 #ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_
21 #define _NET_BATMAN_ADV_HARD_INTERFACE_H_
22
23 enum batadv_hard_if_state {
24         BATADV_IF_NOT_IN_USE,
25         BATADV_IF_TO_BE_REMOVED,
26         BATADV_IF_INACTIVE,
27         BATADV_IF_ACTIVE,
28         BATADV_IF_TO_BE_ACTIVATED,
29         BATADV_IF_I_WANT_YOU,
30 };
31
32 extern struct notifier_block batadv_hard_if_notifier;
33
34 struct batadv_hard_iface*
35 batadv_hardif_get_by_netdev(const struct net_device *net_dev);
36 int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
37                                    const char *iface_name);
38 void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface);
39 void batadv_hardif_remove_interfaces(void);
40 int batadv_hardif_min_mtu(struct net_device *soft_iface);
41 void batadv_update_min_mtu(struct net_device *soft_iface);
42 void batadv_hardif_free_rcu(struct rcu_head *rcu);
43 bool batadv_is_wifi_iface(int ifindex);
44
45 static inline void
46 batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface)
47 {
48         if (atomic_dec_and_test(&hard_iface->refcount))
49                 call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu);
50 }
51
52 static inline struct batadv_hard_iface *
53 batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
54 {
55         struct batadv_hard_iface *hard_iface;
56
57         rcu_read_lock();
58         hard_iface = rcu_dereference(bat_priv->primary_if);
59         if (!hard_iface)
60                 goto out;
61
62         if (!atomic_inc_not_zero(&hard_iface->refcount))
63                 hard_iface = NULL;
64
65 out:
66         rcu_read_unlock();
67         return hard_iface;
68 }
69
70 #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */