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5beef3c9 | 1 | /* |
9b6d10b7 | 2 | * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors: |
5beef3c9 AL |
3 | * |
4 | * Marek Lindner, Simon Wunderlich | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of version 2 of the GNU General Public | |
8 | * License as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
18 | * 02110-1301, USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #include "main.h" | |
47fdf097 | 23 | #include "bat_sysfs.h" |
5beef3c9 AL |
24 | #include "routing.h" |
25 | #include "send.h" | |
8a2e042c | 26 | #include "originator.h" |
5beef3c9 AL |
27 | #include "soft-interface.h" |
28 | #include "device.h" | |
29 | #include "translation-table.h" | |
30 | #include "hard-interface.h" | |
31 | #include "types.h" | |
32 | #include "vis.h" | |
33 | #include "hash.h" | |
5beef3c9 AL |
34 | |
35 | struct list_head if_list; | |
36 | struct hlist_head forw_bat_list; | |
37 | struct hlist_head forw_bcast_list; | |
38 | struct hashtable_t *orig_hash; | |
39 | ||
40 | DEFINE_SPINLOCK(orig_hash_lock); | |
41 | DEFINE_SPINLOCK(forw_bat_list_lock); | |
42 | DEFINE_SPINLOCK(forw_bcast_list_lock); | |
43 | ||
5beef3c9 | 44 | atomic_t vis_interval; |
19dae340 SW |
45 | atomic_t bcast_queue_left; |
46 | atomic_t batman_queue_left; | |
47 | ||
5beef3c9 | 48 | int16_t num_hna; |
5beef3c9 AL |
49 | |
50 | struct net_device *soft_device; | |
51 | ||
5beef3c9 AL |
52 | unsigned char broadcastAddr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
53 | atomic_t module_state; | |
54 | ||
e7017195 | 55 | static struct packet_type batman_adv_packet_type __read_mostly = { |
b9b27e4e | 56 | .type = __constant_htons(ETH_P_BATMAN), |
e7017195 SW |
57 | .func = batman_skb_recv, |
58 | }; | |
59 | ||
5beef3c9 AL |
60 | struct workqueue_struct *bat_event_workqueue; |
61 | ||
734cc82a | 62 | #ifdef CONFIG_BATMAN_ADV_DEBUG |
bad2239e AL |
63 | int debug; |
64 | ||
65 | module_param(debug, int, 0644); | |
66 | ||
67 | int bat_debug_type(int type) | |
68 | { | |
69 | return debug & type; | |
70 | } | |
71 | #endif | |
72 | ||
5beef3c9 AL |
73 | int init_module(void) |
74 | { | |
75 | int retval; | |
76 | ||
77 | INIT_LIST_HEAD(&if_list); | |
78 | INIT_HLIST_HEAD(&forw_bat_list); | |
79 | INIT_HLIST_HEAD(&forw_bcast_list); | |
80 | ||
81 | atomic_set(&module_state, MODULE_INACTIVE); | |
82 | ||
5beef3c9 AL |
83 | atomic_set(&vis_interval, 1000);/* TODO: raise this later, this is only |
84 | * for debugging now. */ | |
19dae340 SW |
85 | atomic_set(&bcast_queue_left, BCAST_QUEUE_LEN); |
86 | atomic_set(&batman_queue_left, BATMAN_QUEUE_LEN); | |
5beef3c9 AL |
87 | |
88 | /* the name should not be longer than 10 chars - see | |
89 | * http://lwn.net/Articles/23634/ */ | |
90 | bat_event_workqueue = create_singlethread_workqueue("bat_events"); | |
91 | ||
92 | if (!bat_event_workqueue) | |
93 | return -ENOMEM; | |
94 | ||
5beef3c9 AL |
95 | bat_device_init(); |
96 | ||
97 | /* initialize layer 2 interface */ | |
98 | soft_device = alloc_netdev(sizeof(struct bat_priv) , "bat%d", | |
99 | interface_setup); | |
100 | ||
101 | if (!soft_device) { | |
6d45d8df SE |
102 | printk(KERN_ERR "batman-adv:" |
103 | "Unable to allocate the batman interface\n"); | |
5beef3c9 AL |
104 | goto end; |
105 | } | |
106 | ||
107 | retval = register_netdev(soft_device); | |
108 | ||
109 | if (retval < 0) { | |
6d45d8df SE |
110 | printk(KERN_ERR "batman-adv:" |
111 | "Unable to register the batman interface: %i\n", retval); | |
5beef3c9 AL |
112 | goto free_soft_device; |
113 | } | |
114 | ||
47fdf097 ML |
115 | retval = sysfs_add_meshif(soft_device); |
116 | ||
117 | if (retval < 0) | |
118 | goto unreg_soft_device; | |
119 | ||
5beef3c9 | 120 | register_netdevice_notifier(&hard_if_notifier); |
e7017195 | 121 | dev_add_pack(&batman_adv_packet_type); |
5beef3c9 | 122 | |
6d45d8df SE |
123 | printk(KERN_INFO "batman-adv:" |
124 | "B.A.T.M.A.N. advanced %s%s (compatibility version %i) loaded\n", | |
125 | SOURCE_VERSION, REVISION_VERSION_STR, COMPAT_VERSION); | |
5beef3c9 AL |
126 | |
127 | return 0; | |
128 | ||
47fdf097 | 129 | unreg_soft_device: |
20c8a44b | 130 | unregister_netdev(soft_device); |
3d9b2358 SE |
131 | soft_device = NULL; |
132 | return -ENOMEM; | |
133 | ||
5beef3c9 AL |
134 | free_soft_device: |
135 | free_netdev(soft_device); | |
136 | soft_device = NULL; | |
137 | end: | |
138 | return -ENOMEM; | |
139 | } | |
140 | ||
141 | void cleanup_module(void) | |
142 | { | |
208e13e4 ML |
143 | deactivate_module(); |
144 | ||
145 | unregister_netdevice_notifier(&hard_if_notifier); | |
146 | hardif_remove_interfaces(); | |
5beef3c9 AL |
147 | |
148 | if (soft_device) { | |
47fdf097 | 149 | sysfs_del_meshif(soft_device); |
5beef3c9 AL |
150 | unregister_netdev(soft_device); |
151 | soft_device = NULL; | |
152 | } | |
153 | ||
e7017195 SW |
154 | dev_remove_pack(&batman_adv_packet_type); |
155 | ||
5beef3c9 AL |
156 | destroy_workqueue(bat_event_workqueue); |
157 | bat_event_workqueue = NULL; | |
158 | } | |
159 | ||
160 | /* activates the module, creates bat device, starts timer ... */ | |
161 | void activate_module(void) | |
162 | { | |
163 | if (originator_init() < 1) | |
164 | goto err; | |
165 | ||
166 | if (hna_local_init() < 1) | |
167 | goto err; | |
168 | ||
169 | if (hna_global_init() < 1) | |
170 | goto err; | |
171 | ||
172 | hna_local_add(soft_device->dev_addr); | |
173 | ||
174 | if (bat_device_setup() < 1) | |
175 | goto end; | |
176 | ||
177 | if (vis_init() < 1) | |
178 | goto err; | |
179 | ||
5beef3c9 AL |
180 | update_min_mtu(); |
181 | atomic_set(&module_state, MODULE_ACTIVE); | |
182 | goto end; | |
183 | ||
184 | err: | |
6d45d8df SE |
185 | printk(KERN_ERR "batman-adv:" |
186 | "Unable to allocate memory for mesh information structures: " | |
187 | "out of mem ?\n"); | |
208e13e4 | 188 | deactivate_module(); |
5beef3c9 AL |
189 | end: |
190 | return; | |
191 | } | |
192 | ||
193 | /* shuts down the whole module.*/ | |
208e13e4 | 194 | void deactivate_module(void) |
5beef3c9 AL |
195 | { |
196 | atomic_set(&module_state, MODULE_DEACTIVATING); | |
197 | ||
208e13e4 | 198 | purge_outstanding_packets(NULL); |
5beef3c9 AL |
199 | flush_workqueue(bat_event_workqueue); |
200 | ||
201 | vis_quit(); | |
202 | ||
e7017195 | 203 | /* TODO: unregister BATMAN pack */ |
5beef3c9 AL |
204 | |
205 | originator_free(); | |
206 | ||
207 | hna_local_free(); | |
208 | hna_global_free(); | |
209 | ||
210 | synchronize_net(); | |
211 | bat_device_destroy(); | |
212 | ||
5beef3c9 AL |
213 | synchronize_rcu(); |
214 | atomic_set(&module_state, MODULE_INACTIVE); | |
215 | } | |
216 | ||
217 | void inc_module_count(void) | |
218 | { | |
219 | try_module_get(THIS_MODULE); | |
220 | } | |
221 | ||
222 | void dec_module_count(void) | |
223 | { | |
224 | module_put(THIS_MODULE); | |
225 | } | |
226 | ||
227 | int addr_to_string(char *buff, uint8_t *addr) | |
228 | { | |
6d45d8df | 229 | return sprintf(buff, MAC_FMT, |
5beef3c9 AL |
230 | addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); |
231 | } | |
232 | ||
233 | /* returns 1 if they are the same originator */ | |
234 | ||
235 | int compare_orig(void *data1, void *data2) | |
236 | { | |
237 | return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); | |
238 | } | |
239 | ||
240 | /* hashfunction to choose an entry in a hash table of given size */ | |
241 | /* hash algorithm from http://en.wikipedia.org/wiki/Hash_table */ | |
242 | int choose_orig(void *data, int32_t size) | |
243 | { | |
244 | unsigned char *key = data; | |
245 | uint32_t hash = 0; | |
246 | size_t i; | |
247 | ||
248 | for (i = 0; i < 6; i++) { | |
249 | hash += key[i]; | |
250 | hash += (hash << 10); | |
251 | hash ^= (hash >> 6); | |
252 | } | |
253 | ||
254 | hash += (hash << 3); | |
255 | hash ^= (hash >> 11); | |
256 | hash += (hash << 15); | |
257 | ||
258 | return hash % size; | |
259 | } | |
260 | ||
261 | int is_my_mac(uint8_t *addr) | |
262 | { | |
263 | struct batman_if *batman_if; | |
264 | rcu_read_lock(); | |
265 | list_for_each_entry_rcu(batman_if, &if_list, list) { | |
266 | if ((batman_if->net_dev) && | |
267 | (compare_orig(batman_if->net_dev->dev_addr, addr))) { | |
268 | rcu_read_unlock(); | |
269 | return 1; | |
270 | } | |
271 | } | |
272 | rcu_read_unlock(); | |
273 | return 0; | |
274 | ||
275 | } | |
276 | ||
277 | int is_bcast(uint8_t *addr) | |
278 | { | |
279 | return (addr[0] == (uint8_t)0xff) && (addr[1] == (uint8_t)0xff); | |
280 | } | |
281 | ||
282 | int is_mcast(uint8_t *addr) | |
283 | { | |
284 | return *addr & 0x01; | |
285 | } | |
286 | ||
287 | MODULE_LICENSE("GPL"); | |
288 | ||
289 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
290 | MODULE_DESCRIPTION(DRIVER_DESC); | |
291 | MODULE_SUPPORTED_DEVICE(DRIVER_DEVICE); | |
292 | #ifdef REVISION_VERSION | |
293 | MODULE_VERSION(SOURCE_VERSION "-" REVISION_VERSION); | |
294 | #else | |
295 | MODULE_VERSION(SOURCE_VERSION); | |
296 | #endif |