summaryrefslogtreecommitdiff
path: root/net/batman-adv/main.c
blob: 3318ee27fe23a59cb48a7dceb661bc4c44d67221 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
/*
 * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
 *
 * Marek Lindner, Simon Wunderlich
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 *
 */

#include "main.h"
#include "bat_sysfs.h"
#include "bat_debugfs.h"
#include "routing.h"
#include "send.h"
#include "originator.h"
#include "soft-interface.h"
#include "icmp_socket.h"
#include "translation-table.h"
#include "hard-interface.h"
#include "gateway_client.h"
#include "vis.h"
#include "hash.h"


/* List manipulations on hardif_list have to be rtnl_lock()'ed,
 * list traversals just rcu-locked */
struct list_head hardif_list;

unsigned char broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};

struct workqueue_struct *bat_event_workqueue;

static int __init batman_init(void)
{
	INIT_LIST_HEAD(&hardif_list);

	/* the name should not be longer than 10 chars - see
	 * http://lwn.net/Articles/23634/ */
	bat_event_workqueue = create_singlethread_workqueue("bat_events");

	if (!bat_event_workqueue)
		return -ENOMEM;

	bat_socket_init();
	debugfs_init();

	register_netdevice_notifier(&hard_if_notifier);

	pr_info("B.A.T.M.A.N. advanced %s%s (compatibility version %i) "
		"loaded\n", SOURCE_VERSION, REVISION_VERSION_STR,
		COMPAT_VERSION);

	return 0;
}

static void __exit batman_exit(void)
{
	debugfs_destroy();
	unregister_netdevice_notifier(&hard_if_notifier);
	hardif_remove_interfaces();

	flush_workqueue(bat_event_workqueue);
	destroy_workqueue(bat_event_workqueue);
	bat_event_workqueue = NULL;

	rcu_barrier();
}

int mesh_init(struct net_device *soft_iface)
{
	struct bat_priv *bat_priv = netdev_priv(soft_iface);

	spin_lock_init(&bat_priv->forw_bat_list_lock);
	spin_lock_init(&bat_priv->forw_bcast_list_lock);
	spin_lock_init(&bat_priv->tt_lhash_lock);
	spin_lock_init(&bat_priv->tt_ghash_lock);
	spin_lock_init(&bat_priv->tt_changes_list_lock);
	spin_lock_init(&bat_priv->tt_req_list_lock);
	spin_lock_init(&bat_priv->tt_roam_list_lock);
	spin_lock_init(&bat_priv->tt_buff_lock);
	spin_lock_init(&bat_priv->gw_list_lock);
	spin_lock_init(&bat_priv->vis_hash_lock);
	spin_lock_init(&bat_priv->vis_list_lock);
	spin_lock_init(&bat_priv->softif_neigh_lock);
	spin_lock_init(&bat_priv->softif_neigh_vid_lock);

	INIT_HLIST_HEAD(&bat_priv->forw_bat_list);
	INIT_HLIST_HEAD(&bat_priv->forw_bcast_list);
	INIT_HLIST_HEAD(&bat_priv->gw_list);
	INIT_HLIST_HEAD(&bat_priv->softif_neigh_vids);
	INIT_LIST_HEAD(&bat_priv->tt_changes_list);
	INIT_LIST_HEAD(&bat_priv->tt_req_list);
	INIT_LIST_HEAD(&bat_priv->tt_roam_list);

	if (originator_init(bat_priv) < 1)
		goto err;

	if (tt_init(bat_priv) < 1)
		goto err;

	tt_local_add(soft_iface, soft_iface->dev_addr);

	if (vis_init(bat_priv) < 1)
		goto err;

	atomic_set(&bat_priv->mesh_state, MESH_ACTIVE);
	goto end;

err:
	pr_err("Unable to allocate memory for mesh information structures: "
	       "out of mem ?\n");
	mesh_free(soft_iface);
	return -1;

end:
	return 0;
}

void mesh_free(struct net_device *soft_iface)
{
	struct bat_priv *bat_priv = netdev_priv(soft_iface);

	atomic_set(&bat_priv->mesh_state, MESH_DEACTIVATING);

	purge_outstanding_packets(bat_priv, NULL);

	vis_quit(bat_priv);

	gw_node_purge(bat_priv);
	originator_free(bat_priv);

	tt_free(bat_priv);

	softif_neigh_purge(bat_priv);

	atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
}

void inc_module_count(void)
{
	try_module_get(THIS_MODULE);
}

void dec_module_count(void)
{
	module_put(THIS_MODULE);
}

int is_my_mac(const uint8_t *addr)
{
	const struct hard_iface *hard_iface;

	rcu_read_lock();
	list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
		if (hard_iface->if_status != IF_ACTIVE)
			continue;

		if (compare_eth(hard_iface->net_dev->dev_addr, addr)) {
			rcu_read_unlock();
			return 1;
		}
	}
	rcu_read_unlock();
	return 0;

}

module_init(batman_init);
module_exit(batman_exit);

MODULE_LICENSE("GPL");

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_SUPPORTED_DEVICE(DRIVER_DEVICE);
#ifdef REVISION_VERSION
MODULE_VERSION(SOURCE_VERSION "-" REVISION_VERSION);
#else
MODULE_VERSION(SOURCE_VERSION);
#endif