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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" | |
23 | #include "proc.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 | ||
44 | atomic_t originator_interval; | |
45 | atomic_t vis_interval; | |
837b8248 | 46 | atomic_t vis_mode; |
5beef3c9 AL |
47 | atomic_t aggregation_enabled; |
48 | int16_t num_hna; | |
49 | int16_t num_ifs; | |
50 | ||
51 | struct net_device *soft_device; | |
52 | ||
5beef3c9 AL |
53 | unsigned char broadcastAddr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
54 | atomic_t module_state; | |
55 | ||
e7017195 | 56 | static struct packet_type batman_adv_packet_type __read_mostly = { |
b9b27e4e | 57 | .type = __constant_htons(ETH_P_BATMAN), |
e7017195 SW |
58 | .func = batman_skb_recv, |
59 | }; | |
60 | ||
5beef3c9 AL |
61 | struct workqueue_struct *bat_event_workqueue; |
62 | ||
734cc82a | 63 | #ifdef CONFIG_BATMAN_ADV_DEBUG |
bad2239e AL |
64 | int debug; |
65 | ||
66 | module_param(debug, int, 0644); | |
67 | ||
68 | int bat_debug_type(int type) | |
69 | { | |
70 | return debug & type; | |
71 | } | |
72 | #endif | |
73 | ||
5beef3c9 AL |
74 | int init_module(void) |
75 | { | |
76 | int retval; | |
77 | ||
78 | INIT_LIST_HEAD(&if_list); | |
79 | INIT_HLIST_HEAD(&forw_bat_list); | |
80 | INIT_HLIST_HEAD(&forw_bcast_list); | |
81 | ||
82 | atomic_set(&module_state, MODULE_INACTIVE); | |
83 | ||
84 | atomic_set(&originator_interval, 1000); | |
85 | atomic_set(&vis_interval, 1000);/* TODO: raise this later, this is only | |
86 | * for debugging now. */ | |
837b8248 | 87 | atomic_set(&vis_mode, VIS_TYPE_CLIENT_UPDATE); |
5beef3c9 AL |
88 | atomic_set(&aggregation_enabled, 1); |
89 | ||
90 | /* the name should not be longer than 10 chars - see | |
91 | * http://lwn.net/Articles/23634/ */ | |
92 | bat_event_workqueue = create_singlethread_workqueue("bat_events"); | |
93 | ||
94 | if (!bat_event_workqueue) | |
95 | return -ENOMEM; | |
96 | ||
97 | retval = setup_procfs(); | |
98 | if (retval < 0) | |
99 | return retval; | |
100 | ||
101 | bat_device_init(); | |
102 | ||
103 | /* initialize layer 2 interface */ | |
104 | soft_device = alloc_netdev(sizeof(struct bat_priv) , "bat%d", | |
105 | interface_setup); | |
106 | ||
107 | if (!soft_device) { | |
bad2239e | 108 | printk(KERN_ERR "batman-adv:Unable to allocate the batman interface\n"); |
5beef3c9 AL |
109 | goto end; |
110 | } | |
111 | ||
112 | retval = register_netdev(soft_device); | |
113 | ||
114 | if (retval < 0) { | |
bad2239e | 115 | printk(KERN_ERR "batman-adv:Unable to register the batman interface: %i\n", retval); |
5beef3c9 AL |
116 | goto free_soft_device; |
117 | } | |
118 | ||
119 | register_netdevice_notifier(&hard_if_notifier); | |
e7017195 | 120 | dev_add_pack(&batman_adv_packet_type); |
5beef3c9 | 121 | |
bad2239e AL |
122 | printk(KERN_INFO "batman-adv:B.A.T.M.A.N. advanced %s%s (compatibility version %i) loaded \n", |
123 | SOURCE_VERSION, REVISION_VERSION_STR, COMPAT_VERSION); | |
5beef3c9 AL |
124 | |
125 | return 0; | |
126 | ||
127 | free_soft_device: | |
128 | free_netdev(soft_device); | |
129 | soft_device = NULL; | |
130 | end: | |
131 | return -ENOMEM; | |
132 | } | |
133 | ||
134 | void cleanup_module(void) | |
135 | { | |
136 | shutdown_module(); | |
137 | ||
138 | if (soft_device) { | |
139 | unregister_netdev(soft_device); | |
140 | soft_device = NULL; | |
141 | } | |
142 | ||
e7017195 SW |
143 | dev_remove_pack(&batman_adv_packet_type); |
144 | ||
5beef3c9 AL |
145 | unregister_netdevice_notifier(&hard_if_notifier); |
146 | cleanup_procfs(); | |
147 | ||
148 | destroy_workqueue(bat_event_workqueue); | |
149 | bat_event_workqueue = NULL; | |
150 | } | |
151 | ||
152 | /* activates the module, creates bat device, starts timer ... */ | |
153 | void activate_module(void) | |
154 | { | |
155 | if (originator_init() < 1) | |
156 | goto err; | |
157 | ||
158 | if (hna_local_init() < 1) | |
159 | goto err; | |
160 | ||
161 | if (hna_global_init() < 1) | |
162 | goto err; | |
163 | ||
164 | hna_local_add(soft_device->dev_addr); | |
165 | ||
166 | if (bat_device_setup() < 1) | |
167 | goto end; | |
168 | ||
169 | if (vis_init() < 1) | |
170 | goto err; | |
171 | ||
5beef3c9 AL |
172 | update_min_mtu(); |
173 | atomic_set(&module_state, MODULE_ACTIVE); | |
174 | goto end; | |
175 | ||
176 | err: | |
bad2239e | 177 | printk(KERN_ERR "batman-adv:Unable to allocate memory for mesh information structures: out of mem ?\n"); |
5beef3c9 AL |
178 | shutdown_module(); |
179 | end: | |
180 | return; | |
181 | } | |
182 | ||
183 | /* shuts down the whole module.*/ | |
184 | void shutdown_module(void) | |
185 | { | |
186 | atomic_set(&module_state, MODULE_DEACTIVATING); | |
187 | ||
188 | purge_outstanding_packets(); | |
189 | flush_workqueue(bat_event_workqueue); | |
190 | ||
191 | vis_quit(); | |
192 | ||
e7017195 | 193 | /* TODO: unregister BATMAN pack */ |
5beef3c9 AL |
194 | |
195 | originator_free(); | |
196 | ||
197 | hna_local_free(); | |
198 | hna_global_free(); | |
199 | ||
200 | synchronize_net(); | |
201 | bat_device_destroy(); | |
202 | ||
203 | hardif_remove_interfaces(); | |
204 | synchronize_rcu(); | |
205 | atomic_set(&module_state, MODULE_INACTIVE); | |
206 | } | |
207 | ||
208 | void inc_module_count(void) | |
209 | { | |
210 | try_module_get(THIS_MODULE); | |
211 | } | |
212 | ||
213 | void dec_module_count(void) | |
214 | { | |
215 | module_put(THIS_MODULE); | |
216 | } | |
217 | ||
218 | int addr_to_string(char *buff, uint8_t *addr) | |
219 | { | |
220 | return sprintf(buff, "%02x:%02x:%02x:%02x:%02x:%02x", | |
221 | addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); | |
222 | } | |
223 | ||
224 | /* returns 1 if they are the same originator */ | |
225 | ||
226 | int compare_orig(void *data1, void *data2) | |
227 | { | |
228 | return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); | |
229 | } | |
230 | ||
231 | /* hashfunction to choose an entry in a hash table of given size */ | |
232 | /* hash algorithm from http://en.wikipedia.org/wiki/Hash_table */ | |
233 | int choose_orig(void *data, int32_t size) | |
234 | { | |
235 | unsigned char *key = data; | |
236 | uint32_t hash = 0; | |
237 | size_t i; | |
238 | ||
239 | for (i = 0; i < 6; i++) { | |
240 | hash += key[i]; | |
241 | hash += (hash << 10); | |
242 | hash ^= (hash >> 6); | |
243 | } | |
244 | ||
245 | hash += (hash << 3); | |
246 | hash ^= (hash >> 11); | |
247 | hash += (hash << 15); | |
248 | ||
249 | return hash % size; | |
250 | } | |
251 | ||
252 | int is_my_mac(uint8_t *addr) | |
253 | { | |
254 | struct batman_if *batman_if; | |
255 | rcu_read_lock(); | |
256 | list_for_each_entry_rcu(batman_if, &if_list, list) { | |
257 | if ((batman_if->net_dev) && | |
258 | (compare_orig(batman_if->net_dev->dev_addr, addr))) { | |
259 | rcu_read_unlock(); | |
260 | return 1; | |
261 | } | |
262 | } | |
263 | rcu_read_unlock(); | |
264 | return 0; | |
265 | ||
266 | } | |
267 | ||
268 | int is_bcast(uint8_t *addr) | |
269 | { | |
270 | return (addr[0] == (uint8_t)0xff) && (addr[1] == (uint8_t)0xff); | |
271 | } | |
272 | ||
273 | int is_mcast(uint8_t *addr) | |
274 | { | |
275 | return *addr & 0x01; | |
276 | } | |
277 | ||
278 | MODULE_LICENSE("GPL"); | |
279 | ||
280 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
281 | MODULE_DESCRIPTION(DRIVER_DESC); | |
282 | MODULE_SUPPORTED_DEVICE(DRIVER_DEVICE); | |
283 | #ifdef REVISION_VERSION | |
284 | MODULE_VERSION(SOURCE_VERSION "-" REVISION_VERSION); | |
285 | #else | |
286 | MODULE_VERSION(SOURCE_VERSION); | |
287 | #endif |