Commit | Line | Data |
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0046b040 | 1 | /* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors: |
fc957275 ML |
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 | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
fc957275 ML |
16 | */ |
17 | ||
a2d08166 | 18 | #include "bat_iv_ogm.h" |
fc957275 | 19 | #include "main.h" |
1e2c2a4f SE |
20 | |
21 | #include <linux/atomic.h> | |
22 | #include <linux/bitmap.h> | |
23 | #include <linux/bitops.h> | |
24 | #include <linux/bug.h> | |
25 | #include <linux/byteorder/generic.h> | |
26 | #include <linux/cache.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/etherdevice.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/if_ether.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/jiffies.h> | |
f0d97253 | 33 | #include <linux/kernel.h> |
77ae32e8 | 34 | #include <linux/kref.h> |
fcafa5e7 | 35 | #include <linux/list.h> |
64ae7445 | 36 | #include <linux/lockdep.h> |
1e2c2a4f SE |
37 | #include <linux/netdevice.h> |
38 | #include <linux/pkt_sched.h> | |
39 | #include <linux/printk.h> | |
40 | #include <linux/random.h> | |
41 | #include <linux/rculist.h> | |
42 | #include <linux/rcupdate.h> | |
43 | #include <linux/seq_file.h> | |
44 | #include <linux/skbuff.h> | |
45 | #include <linux/slab.h> | |
46 | #include <linux/spinlock.h> | |
47 | #include <linux/stddef.h> | |
48 | #include <linux/string.h> | |
49 | #include <linux/types.h> | |
50 | #include <linux/workqueue.h> | |
51 | ||
a2d08166 | 52 | #include "bat_algo.h" |
1e2c2a4f SE |
53 | #include "bitarray.h" |
54 | #include "hard-interface.h" | |
55 | #include "hash.h" | |
ba412080 | 56 | #include "log.h" |
1e2c2a4f | 57 | #include "network-coding.h" |
fc957275 | 58 | #include "originator.h" |
1e2c2a4f | 59 | #include "packet.h" |
fc957275 | 60 | #include "routing.h" |
fc957275 | 61 | #include "send.h" |
1e2c2a4f | 62 | #include "translation-table.h" |
1f8dce49 | 63 | #include "tvlv.h" |
fc957275 | 64 | |
f0d97253 AQ |
65 | static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct *work); |
66 | ||
791c2a2d | 67 | /** |
95298a91 | 68 | * enum batadv_dup_status - duplicate status |
9f52ee19 | 69 | * @BATADV_NO_DUP: the packet is no duplicate |
791c2a2d AQ |
70 | * @BATADV_ORIG_DUP: OGM is a duplicate in the originator (but not for the |
71 | * neighbor) | |
72 | * @BATADV_NEIGH_DUP: OGM is a duplicate for the neighbor | |
73 | * @BATADV_PROTECTED: originator is currently protected (after reboot) | |
74 | */ | |
75 | enum batadv_dup_status { | |
76 | BATADV_NO_DUP = 0, | |
77 | BATADV_ORIG_DUP, | |
78 | BATADV_NEIGH_DUP, | |
79 | BATADV_PROTECTED, | |
80 | }; | |
81 | ||
24a5deeb AQ |
82 | /** |
83 | * batadv_ring_buffer_set - update the ring buffer with the given value | |
84 | * @lq_recv: pointer to the ring buffer | |
85 | * @lq_index: index to store the value at | |
86 | * @value: value to store in the ring buffer | |
87 | */ | |
6b5e971a | 88 | static void batadv_ring_buffer_set(u8 lq_recv[], u8 *lq_index, u8 value) |
24a5deeb AQ |
89 | { |
90 | lq_recv[*lq_index] = value; | |
91 | *lq_index = (*lq_index + 1) % BATADV_TQ_GLOBAL_WINDOW_SIZE; | |
92 | } | |
93 | ||
94 | /** | |
d491dbb6 | 95 | * batadv_ring_buffer_avg - compute the average of all non-zero values stored |
24a5deeb AQ |
96 | * in the given ring buffer |
97 | * @lq_recv: pointer to the ring buffer | |
98 | * | |
62fe710f | 99 | * Return: computed average value. |
24a5deeb | 100 | */ |
6b5e971a | 101 | static u8 batadv_ring_buffer_avg(const u8 lq_recv[]) |
24a5deeb | 102 | { |
6b5e971a SE |
103 | const u8 *ptr; |
104 | u16 count = 0; | |
105 | u16 i = 0; | |
106 | u16 sum = 0; | |
24a5deeb AQ |
107 | |
108 | ptr = lq_recv; | |
109 | ||
110 | while (i < BATADV_TQ_GLOBAL_WINDOW_SIZE) { | |
111 | if (*ptr != 0) { | |
112 | count++; | |
113 | sum += *ptr; | |
114 | } | |
115 | ||
116 | i++; | |
117 | ptr++; | |
118 | } | |
119 | ||
120 | if (count == 0) | |
121 | return 0; | |
122 | ||
6b5e971a | 123 | return (u8)(sum / count); |
24a5deeb | 124 | } |
d98cae64 | 125 | |
d0015fdd AQ |
126 | /** |
127 | * batadv_iv_ogm_orig_free - free the private resources allocated for this | |
128 | * orig_node | |
129 | * @orig_node: the orig_node for which the resources have to be free'd | |
130 | */ | |
131 | static void batadv_iv_ogm_orig_free(struct batadv_orig_node *orig_node) | |
132 | { | |
133 | kfree(orig_node->bat_iv.bcast_own); | |
134 | kfree(orig_node->bat_iv.bcast_own_sum); | |
135 | } | |
136 | ||
137 | /** | |
138 | * batadv_iv_ogm_orig_add_if - change the private structures of the orig_node to | |
139 | * include the new hard-interface | |
140 | * @orig_node: the orig_node that has to be changed | |
141 | * @max_if_num: the current amount of interfaces | |
142 | * | |
62fe710f | 143 | * Return: 0 on success, a negative error code otherwise. |
d0015fdd AQ |
144 | */ |
145 | static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node *orig_node, | |
146 | int max_if_num) | |
147 | { | |
148 | void *data_ptr; | |
0185dda6 | 149 | size_t old_size; |
d0015fdd AQ |
150 | int ret = -ENOMEM; |
151 | ||
152 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
153 | ||
d0015fdd | 154 | old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS; |
0185dda6 AQ |
155 | data_ptr = kmalloc_array(max_if_num, |
156 | BATADV_NUM_WORDS * sizeof(unsigned long), | |
157 | GFP_ATOMIC); | |
d0015fdd AQ |
158 | if (!data_ptr) |
159 | goto unlock; | |
160 | ||
161 | memcpy(data_ptr, orig_node->bat_iv.bcast_own, old_size); | |
162 | kfree(orig_node->bat_iv.bcast_own); | |
163 | orig_node->bat_iv.bcast_own = data_ptr; | |
164 | ||
6b5e971a | 165 | data_ptr = kmalloc_array(max_if_num, sizeof(u8), GFP_ATOMIC); |
f7dcdf5f | 166 | if (!data_ptr) |
d0015fdd | 167 | goto unlock; |
d0015fdd AQ |
168 | |
169 | memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum, | |
6b5e971a | 170 | (max_if_num - 1) * sizeof(u8)); |
d0015fdd AQ |
171 | kfree(orig_node->bat_iv.bcast_own_sum); |
172 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
173 | ||
174 | ret = 0; | |
175 | ||
176 | unlock: | |
177 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
178 | ||
179 | return ret; | |
180 | } | |
181 | ||
182 | /** | |
64ae7445 | 183 | * batadv_iv_ogm_drop_bcast_own_entry - drop section of bcast_own |
d0015fdd AQ |
184 | * @orig_node: the orig_node that has to be changed |
185 | * @max_if_num: the current amount of interfaces | |
186 | * @del_if_num: the index of the interface being removed | |
d0015fdd | 187 | */ |
64ae7445 SE |
188 | static void |
189 | batadv_iv_ogm_drop_bcast_own_entry(struct batadv_orig_node *orig_node, | |
190 | int max_if_num, int del_if_num) | |
d0015fdd | 191 | { |
64ae7445 SE |
192 | size_t chunk_size; |
193 | size_t if_offset; | |
194 | void *data_ptr; | |
d0015fdd | 195 | |
64ae7445 | 196 | lockdep_assert_held(&orig_node->bat_iv.ogm_cnt_lock); |
d0015fdd AQ |
197 | |
198 | chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS; | |
0185dda6 | 199 | data_ptr = kmalloc_array(max_if_num, chunk_size, GFP_ATOMIC); |
d0015fdd | 200 | if (!data_ptr) |
64ae7445 SE |
201 | /* use old buffer when new one could not be allocated */ |
202 | data_ptr = orig_node->bat_iv.bcast_own; | |
d0015fdd AQ |
203 | |
204 | /* copy first part */ | |
64ae7445 | 205 | memmove(data_ptr, orig_node->bat_iv.bcast_own, del_if_num * chunk_size); |
d0015fdd AQ |
206 | |
207 | /* copy second part */ | |
13bbdd37 | 208 | if_offset = (del_if_num + 1) * chunk_size; |
64ae7445 SE |
209 | memmove((char *)data_ptr + del_if_num * chunk_size, |
210 | (uint8_t *)orig_node->bat_iv.bcast_own + if_offset, | |
211 | (max_if_num - del_if_num) * chunk_size); | |
d0015fdd | 212 | |
64ae7445 SE |
213 | /* bcast_own was shrunk down in new buffer; free old one */ |
214 | if (orig_node->bat_iv.bcast_own != data_ptr) { | |
215 | kfree(orig_node->bat_iv.bcast_own); | |
216 | orig_node->bat_iv.bcast_own = data_ptr; | |
217 | } | |
218 | } | |
d0015fdd | 219 | |
64ae7445 SE |
220 | /** |
221 | * batadv_iv_ogm_drop_bcast_own_sum_entry - drop section of bcast_own_sum | |
222 | * @orig_node: the orig_node that has to be changed | |
223 | * @max_if_num: the current amount of interfaces | |
224 | * @del_if_num: the index of the interface being removed | |
225 | */ | |
226 | static void | |
227 | batadv_iv_ogm_drop_bcast_own_sum_entry(struct batadv_orig_node *orig_node, | |
228 | int max_if_num, int del_if_num) | |
229 | { | |
230 | size_t if_offset; | |
231 | void *data_ptr; | |
232 | ||
233 | lockdep_assert_held(&orig_node->bat_iv.ogm_cnt_lock); | |
d0015fdd | 234 | |
6b5e971a | 235 | data_ptr = kmalloc_array(max_if_num, sizeof(u8), GFP_ATOMIC); |
64ae7445 SE |
236 | if (!data_ptr) |
237 | /* use old buffer when new one could not be allocated */ | |
238 | data_ptr = orig_node->bat_iv.bcast_own_sum; | |
d0015fdd | 239 | |
64ae7445 SE |
240 | memmove(data_ptr, orig_node->bat_iv.bcast_own_sum, |
241 | del_if_num * sizeof(u8)); | |
d0015fdd | 242 | |
6b5e971a | 243 | if_offset = (del_if_num + 1) * sizeof(u8); |
64ae7445 SE |
244 | memmove((char *)data_ptr + del_if_num * sizeof(u8), |
245 | orig_node->bat_iv.bcast_own_sum + if_offset, | |
246 | (max_if_num - del_if_num) * sizeof(u8)); | |
247 | ||
248 | /* bcast_own_sum was shrunk down in new buffer; free old one */ | |
249 | if (orig_node->bat_iv.bcast_own_sum != data_ptr) { | |
250 | kfree(orig_node->bat_iv.bcast_own_sum); | |
251 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
252 | } | |
253 | } | |
d0015fdd | 254 | |
64ae7445 SE |
255 | /** |
256 | * batadv_iv_ogm_orig_del_if - change the private structures of the orig_node to | |
257 | * exclude the removed interface | |
258 | * @orig_node: the orig_node that has to be changed | |
259 | * @max_if_num: the current amount of interfaces | |
260 | * @del_if_num: the index of the interface being removed | |
261 | * | |
262 | * Return: 0 on success, a negative error code otherwise. | |
263 | */ | |
264 | static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node *orig_node, | |
265 | int max_if_num, int del_if_num) | |
266 | { | |
267 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
268 | ||
269 | if (max_if_num == 0) { | |
270 | kfree(orig_node->bat_iv.bcast_own); | |
271 | kfree(orig_node->bat_iv.bcast_own_sum); | |
272 | orig_node->bat_iv.bcast_own = NULL; | |
273 | orig_node->bat_iv.bcast_own_sum = NULL; | |
274 | } else { | |
275 | batadv_iv_ogm_drop_bcast_own_entry(orig_node, max_if_num, | |
276 | del_if_num); | |
277 | batadv_iv_ogm_drop_bcast_own_sum_entry(orig_node, max_if_num, | |
278 | del_if_num); | |
279 | } | |
d0015fdd | 280 | |
d0015fdd AQ |
281 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
282 | ||
64ae7445 | 283 | return 0; |
d0015fdd AQ |
284 | } |
285 | ||
bbad0a5e AQ |
286 | /** |
287 | * batadv_iv_ogm_orig_get - retrieve or create (if does not exist) an originator | |
288 | * @bat_priv: the bat priv with all the soft interface information | |
289 | * @addr: mac address of the originator | |
290 | * | |
62fe710f | 291 | * Return: the originator object corresponding to the passed mac address or NULL |
bbad0a5e AQ |
292 | * on failure. |
293 | * If the object does not exists it is created an initialised. | |
294 | */ | |
295 | static struct batadv_orig_node * | |
6b5e971a | 296 | batadv_iv_ogm_orig_get(struct batadv_priv *bat_priv, const u8 *addr) |
bbad0a5e AQ |
297 | { |
298 | struct batadv_orig_node *orig_node; | |
299 | int size, hash_added; | |
300 | ||
301 | orig_node = batadv_orig_hash_find(bat_priv, addr); | |
302 | if (orig_node) | |
303 | return orig_node; | |
304 | ||
305 | orig_node = batadv_orig_node_new(bat_priv, addr); | |
306 | if (!orig_node) | |
307 | return NULL; | |
308 | ||
309 | spin_lock_init(&orig_node->bat_iv.ogm_cnt_lock); | |
310 | ||
311 | size = bat_priv->num_ifaces * sizeof(unsigned long) * BATADV_NUM_WORDS; | |
312 | orig_node->bat_iv.bcast_own = kzalloc(size, GFP_ATOMIC); | |
313 | if (!orig_node->bat_iv.bcast_own) | |
314 | goto free_orig_node; | |
315 | ||
6b5e971a | 316 | size = bat_priv->num_ifaces * sizeof(u8); |
bbad0a5e AQ |
317 | orig_node->bat_iv.bcast_own_sum = kzalloc(size, GFP_ATOMIC); |
318 | if (!orig_node->bat_iv.bcast_own_sum) | |
a5a5cb8c | 319 | goto free_orig_node; |
bbad0a5e AQ |
320 | |
321 | hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig, | |
322 | batadv_choose_orig, orig_node, | |
323 | &orig_node->hash_entry); | |
324 | if (hash_added != 0) | |
a5a5cb8c | 325 | goto free_orig_node; |
bbad0a5e AQ |
326 | |
327 | return orig_node; | |
328 | ||
bbad0a5e | 329 | free_orig_node: |
b2262df7 | 330 | /* free twice, as batadv_orig_node_new sets refcount to 2 */ |
5d967310 SE |
331 | batadv_orig_node_put(orig_node); |
332 | batadv_orig_node_put(orig_node); | |
bbad0a5e AQ |
333 | |
334 | return NULL; | |
335 | } | |
336 | ||
56303d34 SE |
337 | static struct batadv_neigh_node * |
338 | batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface, | |
6b5e971a | 339 | const u8 *neigh_addr, |
56303d34 | 340 | struct batadv_orig_node *orig_node, |
863dd7a8 | 341 | struct batadv_orig_node *orig_neigh) |
7ae8b285 | 342 | { |
741aa06b | 343 | struct batadv_neigh_node *neigh_node; |
7ae8b285 | 344 | |
6f0a6b5e ML |
345 | neigh_node = batadv_neigh_node_get_or_create(orig_node, |
346 | hard_iface, neigh_addr); | |
7ae8b285 ML |
347 | if (!neigh_node) |
348 | goto out; | |
349 | ||
89652331 | 350 | neigh_node->orig_node = orig_neigh; |
7ae8b285 | 351 | |
7ae8b285 ML |
352 | out: |
353 | return neigh_node; | |
354 | } | |
355 | ||
56303d34 | 356 | static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 357 | { |
96412690 | 358 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 359 | unsigned char *ogm_buff; |
6b5e971a | 360 | u32 random_seqno; |
d7d32ec0 ML |
361 | |
362 | /* randomize initial seqno to avoid collision */ | |
363 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
14511519 | 364 | atomic_set(&hard_iface->bat_iv.ogm_seqno, random_seqno); |
d0b9fd89 | 365 | |
14511519 ML |
366 | hard_iface->bat_iv.ogm_buff_len = BATADV_OGM_HLEN; |
367 | ogm_buff = kmalloc(hard_iface->bat_iv.ogm_buff_len, GFP_ATOMIC); | |
368 | if (!ogm_buff) | |
42d9f2cb | 369 | return -ENOMEM; |
77af7575 | 370 | |
14511519 ML |
371 | hard_iface->bat_iv.ogm_buff = ogm_buff; |
372 | ||
373 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; | |
a40d9b07 SW |
374 | batadv_ogm_packet->packet_type = BATADV_IV_OGM; |
375 | batadv_ogm_packet->version = BATADV_COMPAT_VERSION; | |
376 | batadv_ogm_packet->ttl = 2; | |
96412690 | 377 | batadv_ogm_packet->flags = BATADV_NO_FLAGS; |
414254e3 | 378 | batadv_ogm_packet->reserved = 0; |
96412690 | 379 | batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; |
77af7575 | 380 | |
42d9f2cb | 381 | return 0; |
d0b9fd89 ML |
382 | } |
383 | ||
56303d34 | 384 | static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface *hard_iface) |
00a50076 | 385 | { |
14511519 ML |
386 | kfree(hard_iface->bat_iv.ogm_buff); |
387 | hard_iface->bat_iv.ogm_buff = NULL; | |
00a50076 ML |
388 | } |
389 | ||
56303d34 | 390 | static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 391 | { |
96412690 | 392 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 393 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 394 | |
14511519 | 395 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
8fdd0153 AQ |
396 | ether_addr_copy(batadv_ogm_packet->orig, |
397 | hard_iface->net_dev->dev_addr); | |
398 | ether_addr_copy(batadv_ogm_packet->prev_sender, | |
399 | hard_iface->net_dev->dev_addr); | |
d0b9fd89 ML |
400 | } |
401 | ||
56303d34 SE |
402 | static void |
403 | batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) | |
d0b9fd89 | 404 | { |
96412690 | 405 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 406 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 407 | |
14511519 | 408 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
a40d9b07 | 409 | batadv_ogm_packet->ttl = BATADV_TTL; |
d0b9fd89 ML |
410 | } |
411 | ||
b9dacc52 | 412 | /* when do we schedule our own ogm to be sent */ |
fe8bc396 | 413 | static unsigned long |
56303d34 | 414 | batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) |
b9dacc52 | 415 | { |
42d0b044 SE |
416 | unsigned int msecs; |
417 | ||
418 | msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; | |
e76e4320 | 419 | msecs += prandom_u32() % (2 * BATADV_JITTER); |
42d0b044 SE |
420 | |
421 | return jiffies + msecs_to_jiffies(msecs); | |
b9dacc52 ML |
422 | } |
423 | ||
424 | /* when do we schedule a ogm packet to be sent */ | |
fe8bc396 | 425 | static unsigned long batadv_iv_ogm_fwd_send_time(void) |
b9dacc52 | 426 | { |
e76e4320 | 427 | return jiffies + msecs_to_jiffies(prandom_u32() % (BATADV_JITTER / 2)); |
b9dacc52 ML |
428 | } |
429 | ||
430 | /* apply hop penalty for a normal link */ | |
6b5e971a | 431 | static u8 batadv_hop_penalty(u8 tq, const struct batadv_priv *bat_priv) |
b9dacc52 ML |
432 | { |
433 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); | |
42d0b044 SE |
434 | int new_tq; |
435 | ||
436 | new_tq = tq * (BATADV_TQ_MAX_VALUE - hop_penalty); | |
437 | new_tq /= BATADV_TQ_MAX_VALUE; | |
438 | ||
439 | return new_tq; | |
b9dacc52 ML |
440 | } |
441 | ||
600184b7 SW |
442 | /** |
443 | * batadv_iv_ogm_aggr_packet - checks if there is another OGM attached | |
444 | * @buff_pos: current position in the skb | |
445 | * @packet_len: total length of the skb | |
446 | * @tvlv_len: tvlv length of the previously considered OGM | |
447 | * | |
448 | * Return: true if there is enough space for another OGM, false otherwise. | |
449 | */ | |
9fd9b19e MP |
450 | static bool batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, |
451 | __be16 tvlv_len) | |
fc957275 | 452 | { |
08c36d3e SE |
453 | int next_buff_pos = 0; |
454 | ||
7e071c79 | 455 | next_buff_pos += buff_pos + BATADV_OGM_HLEN; |
ef261577 | 456 | next_buff_pos += ntohs(tvlv_len); |
fc957275 ML |
457 | |
458 | return (next_buff_pos <= packet_len) && | |
42d0b044 | 459 | (next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES); |
fc957275 ML |
460 | } |
461 | ||
b9dacc52 | 462 | /* send a batman ogm to a given interface */ |
56303d34 SE |
463 | static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, |
464 | struct batadv_hard_iface *hard_iface) | |
b9dacc52 | 465 | { |
56303d34 | 466 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
de12baec | 467 | const char *fwd_str; |
6b5e971a SE |
468 | u8 packet_num; |
469 | s16 buff_pos; | |
96412690 | 470 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 471 | struct sk_buff *skb; |
6b5e971a | 472 | u8 *packet_pos; |
b9dacc52 | 473 | |
e9a4f295 | 474 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
b9dacc52 ML |
475 | return; |
476 | ||
477 | packet_num = 0; | |
478 | buff_pos = 0; | |
c67893d1 SE |
479 | packet_pos = forw_packet->skb->data; |
480 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
481 | |
482 | /* adjust all flags and log packets */ | |
fe8bc396 | 483 | while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len, |
ef261577 | 484 | batadv_ogm_packet->tvlv_len)) { |
b9dacc52 | 485 | /* we might have aggregated direct link packets with an |
9cfc7bd6 SE |
486 | * ordinary base packet |
487 | */ | |
8de47de5 SE |
488 | if (forw_packet->direct_link_flags & BIT(packet_num) && |
489 | forw_packet->if_incoming == hard_iface) | |
96412690 | 490 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 491 | else |
96412690 | 492 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 493 | |
c67893d1 SE |
494 | if (packet_num > 0 || !forw_packet->own) |
495 | fwd_str = "Forwarding"; | |
496 | else | |
497 | fwd_str = "Sending own"; | |
498 | ||
39c75a51 | 499 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
e1bf0c14 | 500 | "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s) on interface %s [%pM]\n", |
1eda58bf | 501 | fwd_str, (packet_num > 0 ? "aggregated " : ""), |
96412690 SE |
502 | batadv_ogm_packet->orig, |
503 | ntohl(batadv_ogm_packet->seqno), | |
a40d9b07 | 504 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl, |
a2f2b6cd | 505 | ((batadv_ogm_packet->flags & BATADV_DIRECTLINK) ? |
1eda58bf | 506 | "on" : "off"), |
e1bf0c14 | 507 | hard_iface->net_dev->name, |
1eda58bf | 508 | hard_iface->net_dev->dev_addr); |
b9dacc52 | 509 | |
7e071c79 | 510 | buff_pos += BATADV_OGM_HLEN; |
ef261577 | 511 | buff_pos += ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 512 | packet_num++; |
c67893d1 SE |
513 | packet_pos = forw_packet->skb->data + buff_pos; |
514 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
515 | } |
516 | ||
517 | /* create clone because function is called more than once */ | |
518 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
f8214865 | 519 | if (skb) { |
d69909d2 SE |
520 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); |
521 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, | |
f8214865 | 522 | skb->len + ETH_HLEN); |
95d39278 | 523 | batadv_send_broadcast_skb(skb, hard_iface); |
f8214865 | 524 | } |
b9dacc52 ML |
525 | } |
526 | ||
527 | /* send a batman ogm packet */ | |
56303d34 | 528 | static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) |
b9dacc52 | 529 | { |
b9dacc52 | 530 | struct net_device *soft_iface; |
56303d34 SE |
531 | struct batadv_priv *bat_priv; |
532 | struct batadv_hard_iface *primary_if = NULL; | |
b9dacc52 ML |
533 | |
534 | if (!forw_packet->if_incoming) { | |
86ceb360 | 535 | pr_err("Error - can't forward packet: incoming iface not specified\n"); |
b9dacc52 ML |
536 | goto out; |
537 | } | |
538 | ||
539 | soft_iface = forw_packet->if_incoming->soft_iface; | |
540 | bat_priv = netdev_priv(soft_iface); | |
541 | ||
ef0a937f | 542 | if (WARN_ON(!forw_packet->if_outgoing)) |
b9dacc52 ML |
543 | goto out; |
544 | ||
ef0a937f | 545 | if (WARN_ON(forw_packet->if_outgoing->soft_iface != soft_iface)) |
b9dacc52 ML |
546 | goto out; |
547 | ||
ef0a937f | 548 | if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) |
b9dacc52 | 549 | goto out; |
b9dacc52 | 550 | |
ef0a937f SW |
551 | primary_if = batadv_primary_if_get_selected(bat_priv); |
552 | if (!primary_if) | |
553 | goto out; | |
b9dacc52 | 554 | |
ef0a937f SW |
555 | /* only for one specific outgoing interface */ |
556 | batadv_iv_ogm_send_to_if(forw_packet, forw_packet->if_outgoing); | |
b9dacc52 ML |
557 | |
558 | out: | |
559 | if (primary_if) | |
82047ad7 | 560 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
561 | } |
562 | ||
ef0a937f SW |
563 | /** |
564 | * batadv_iv_ogm_can_aggregate - find out if an OGM can be aggregated on an | |
565 | * existing forward packet | |
566 | * @new_bat_ogm_packet: OGM packet to be aggregated | |
567 | * @bat_priv: the bat priv with all the soft interface information | |
568 | * @packet_len: (total) length of the OGM | |
569 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
95298a91 | 570 | * @directlink: true if this is a direct link packet |
ef0a937f SW |
571 | * @if_incoming: interface where the packet was received |
572 | * @if_outgoing: interface for which the retransmission should be considered | |
573 | * @forw_packet: the forwarded packet which should be checked | |
574 | * | |
62fe710f | 575 | * Return: true if new_packet can be aggregated with forw_packet |
ef0a937f | 576 | */ |
fe8bc396 | 577 | static bool |
96412690 | 578 | batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, |
56303d34 | 579 | struct batadv_priv *bat_priv, |
fe8bc396 SE |
580 | int packet_len, unsigned long send_time, |
581 | bool directlink, | |
56303d34 | 582 | const struct batadv_hard_iface *if_incoming, |
ef0a937f | 583 | const struct batadv_hard_iface *if_outgoing, |
56303d34 | 584 | const struct batadv_forw_packet *forw_packet) |
b9dacc52 | 585 | { |
96412690 | 586 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 587 | int aggregated_bytes = forw_packet->packet_len + packet_len; |
56303d34 | 588 | struct batadv_hard_iface *primary_if = NULL; |
b9dacc52 | 589 | bool res = false; |
42d0b044 | 590 | unsigned long aggregation_end_time; |
b9dacc52 | 591 | |
96412690 | 592 | batadv_ogm_packet = (struct batadv_ogm_packet *)forw_packet->skb->data; |
42d0b044 SE |
593 | aggregation_end_time = send_time; |
594 | aggregation_end_time += msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); | |
b9dacc52 | 595 | |
9cfc7bd6 | 596 | /* we can aggregate the current packet to this aggregated packet |
b9dacc52 ML |
597 | * if: |
598 | * | |
599 | * - the send time is within our MAX_AGGREGATION_MS time | |
600 | * - the resulting packet wont be bigger than | |
601 | * MAX_AGGREGATION_BYTES | |
8f34b388 | 602 | * otherwise aggregation is not possible |
b9dacc52 | 603 | */ |
8f34b388 MP |
604 | if (!time_before(send_time, forw_packet->send_time) || |
605 | !time_after_eq(aggregation_end_time, forw_packet->send_time)) | |
606 | return false; | |
607 | ||
608 | if (aggregated_bytes > BATADV_MAX_AGGREGATION_BYTES) | |
609 | return false; | |
610 | ||
611 | /* packet is not leaving on the same interface. */ | |
612 | if (forw_packet->if_outgoing != if_outgoing) | |
613 | return false; | |
614 | ||
615 | /* check aggregation compatibility | |
616 | * -> direct link packets are broadcasted on | |
617 | * their interface only | |
618 | * -> aggregate packet if the current packet is | |
619 | * a "global" packet as well as the base | |
620 | * packet | |
621 | */ | |
622 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
623 | if (!primary_if) | |
624 | return false; | |
ef0a937f | 625 | |
8f34b388 MP |
626 | /* packets without direct link flag and high TTL |
627 | * are flooded through the net | |
628 | */ | |
629 | if (!directlink && | |
630 | !(batadv_ogm_packet->flags & BATADV_DIRECTLINK) && | |
631 | batadv_ogm_packet->ttl != 1 && | |
632 | ||
633 | /* own packets originating non-primary | |
634 | * interfaces leave only that interface | |
635 | */ | |
636 | (!forw_packet->own || | |
637 | forw_packet->if_incoming == primary_if)) { | |
638 | res = true; | |
639 | goto out; | |
640 | } | |
b9dacc52 | 641 | |
8f34b388 MP |
642 | /* if the incoming packet is sent via this one |
643 | * interface only - we still can aggregate | |
644 | */ | |
645 | if (directlink && | |
646 | new_bat_ogm_packet->ttl == 1 && | |
647 | forw_packet->if_incoming == if_incoming && | |
648 | ||
649 | /* packets from direct neighbors or | |
650 | * own secondary interface packets | |
651 | * (= secondary interface packets in general) | |
652 | */ | |
653 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK || | |
654 | (forw_packet->own && | |
655 | forw_packet->if_incoming != primary_if))) { | |
656 | res = true; | |
657 | goto out; | |
b9dacc52 ML |
658 | } |
659 | ||
660 | out: | |
661 | if (primary_if) | |
82047ad7 | 662 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
663 | return res; |
664 | } | |
665 | ||
1b371d13 SW |
666 | /** |
667 | * batadv_iv_ogm_aggregate_new - create a new aggregated packet and add this | |
ef0a937f SW |
668 | * packet to it. |
669 | * @packet_buff: pointer to the OGM | |
670 | * @packet_len: (total) length of the OGM | |
671 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
672 | * @direct_link: whether this OGM has direct link status | |
673 | * @if_incoming: interface where the packet was received | |
674 | * @if_outgoing: interface for which the retransmission should be considered | |
675 | * @own_packet: true if it is a self-generated ogm | |
676 | */ | |
fe8bc396 SE |
677 | static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, |
678 | int packet_len, unsigned long send_time, | |
679 | bool direct_link, | |
56303d34 | 680 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 681 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 682 | int own_packet) |
b9dacc52 | 683 | { |
56303d34 SE |
684 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
685 | struct batadv_forw_packet *forw_packet_aggr; | |
b9dacc52 | 686 | unsigned char *skb_buff; |
42d0b044 | 687 | unsigned int skb_size; |
b9dacc52 | 688 | |
b9dacc52 ML |
689 | /* own packet should always be scheduled */ |
690 | if (!own_packet) { | |
3e34819e | 691 | if (!batadv_atomic_dec_not_zero(&bat_priv->batman_queue_left)) { |
39c75a51 | 692 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 693 | "batman packet queue full\n"); |
17a86915 | 694 | return; |
b9dacc52 ML |
695 | } |
696 | } | |
697 | ||
698 | forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC); | |
940d156f MP |
699 | if (!forw_packet_aggr) |
700 | goto out_nomem; | |
b9dacc52 | 701 | |
940d156f MP |
702 | if (atomic_read(&bat_priv->aggregated_ogms) && |
703 | packet_len < BATADV_MAX_AGGREGATION_BYTES) | |
5b246574 | 704 | skb_size = BATADV_MAX_AGGREGATION_BYTES; |
b9dacc52 | 705 | else |
5b246574 SE |
706 | skb_size = packet_len; |
707 | ||
41ab6c48 | 708 | skb_size += ETH_HLEN; |
b9dacc52 | 709 | |
41ab6c48 | 710 | forw_packet_aggr->skb = netdev_alloc_skb_ip_align(NULL, skb_size); |
940d156f MP |
711 | if (!forw_packet_aggr->skb) |
712 | goto out_free_forw_packet; | |
c54f38c9 | 713 | forw_packet_aggr->skb->priority = TC_PRIO_CONTROL; |
41ab6c48 | 714 | skb_reserve(forw_packet_aggr->skb, ETH_HLEN); |
b9dacc52 | 715 | |
b9dacc52 ML |
716 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
717 | forw_packet_aggr->packet_len = packet_len; | |
718 | memcpy(skb_buff, packet_buff, packet_len); | |
719 | ||
17a86915 SE |
720 | kref_get(&if_incoming->refcount); |
721 | kref_get(&if_outgoing->refcount); | |
b9dacc52 ML |
722 | forw_packet_aggr->own = own_packet; |
723 | forw_packet_aggr->if_incoming = if_incoming; | |
ef0a937f | 724 | forw_packet_aggr->if_outgoing = if_outgoing; |
b9dacc52 | 725 | forw_packet_aggr->num_packets = 0; |
42d0b044 | 726 | forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; |
b9dacc52 ML |
727 | forw_packet_aggr->send_time = send_time; |
728 | ||
729 | /* save packet direct link flag status */ | |
730 | if (direct_link) | |
731 | forw_packet_aggr->direct_link_flags |= 1; | |
732 | ||
733 | /* add new packet to packet list */ | |
734 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
735 | hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list); | |
736 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
737 | ||
738 | /* start timer for this packet */ | |
739 | INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, | |
f0d97253 | 740 | batadv_iv_send_outstanding_bat_ogm_packet); |
3193e8fd | 741 | queue_delayed_work(batadv_event_workqueue, |
b9dacc52 ML |
742 | &forw_packet_aggr->delayed_work, |
743 | send_time - jiffies); | |
744 | ||
745 | return; | |
940d156f MP |
746 | out_free_forw_packet: |
747 | kfree(forw_packet_aggr); | |
748 | out_nomem: | |
749 | if (!own_packet) | |
750 | atomic_inc(&bat_priv->batman_queue_left); | |
b9dacc52 ML |
751 | } |
752 | ||
753 | /* aggregate a new packet into the existing ogm packet */ | |
56303d34 | 754 | static void batadv_iv_ogm_aggregate(struct batadv_forw_packet *forw_packet_aggr, |
fe8bc396 SE |
755 | const unsigned char *packet_buff, |
756 | int packet_len, bool direct_link) | |
b9dacc52 ML |
757 | { |
758 | unsigned char *skb_buff; | |
8de47de5 | 759 | unsigned long new_direct_link_flag; |
b9dacc52 ML |
760 | |
761 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); | |
762 | memcpy(skb_buff, packet_buff, packet_len); | |
763 | forw_packet_aggr->packet_len += packet_len; | |
764 | forw_packet_aggr->num_packets++; | |
765 | ||
766 | /* save packet direct link flag status */ | |
8de47de5 SE |
767 | if (direct_link) { |
768 | new_direct_link_flag = BIT(forw_packet_aggr->num_packets); | |
769 | forw_packet_aggr->direct_link_flags |= new_direct_link_flag; | |
770 | } | |
b9dacc52 ML |
771 | } |
772 | ||
ef0a937f SW |
773 | /** |
774 | * batadv_iv_ogm_queue_add - queue up an OGM for transmission | |
775 | * @bat_priv: the bat priv with all the soft interface information | |
776 | * @packet_buff: pointer to the OGM | |
777 | * @packet_len: (total) length of the OGM | |
778 | * @if_incoming: interface where the packet was received | |
779 | * @if_outgoing: interface for which the retransmission should be considered | |
780 | * @own_packet: true if it is a self-generated ogm | |
781 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
782 | */ | |
56303d34 | 783 | static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, |
fe8bc396 SE |
784 | unsigned char *packet_buff, |
785 | int packet_len, | |
56303d34 | 786 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 787 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 788 | int own_packet, unsigned long send_time) |
b9dacc52 | 789 | { |
9cfc7bd6 | 790 | /* _aggr -> pointer to the packet we want to aggregate with |
b9dacc52 ML |
791 | * _pos -> pointer to the position in the queue |
792 | */ | |
56303d34 SE |
793 | struct batadv_forw_packet *forw_packet_aggr = NULL; |
794 | struct batadv_forw_packet *forw_packet_pos = NULL; | |
96412690 | 795 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 796 | bool direct_link; |
42d0b044 | 797 | unsigned long max_aggregation_jiffies; |
b9dacc52 | 798 | |
96412690 | 799 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
56489151 | 800 | direct_link = !!(batadv_ogm_packet->flags & BATADV_DIRECTLINK); |
42d0b044 | 801 | max_aggregation_jiffies = msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
b9dacc52 ML |
802 | |
803 | /* find position for the packet in the forward queue */ | |
804 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
805 | /* own packets are not to be aggregated */ | |
56489151 | 806 | if (atomic_read(&bat_priv->aggregated_ogms) && !own_packet) { |
b67bfe0d | 807 | hlist_for_each_entry(forw_packet_pos, |
b9dacc52 | 808 | &bat_priv->forw_bat_list, list) { |
96412690 | 809 | if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet, |
fe8bc396 SE |
810 | bat_priv, packet_len, |
811 | send_time, direct_link, | |
812 | if_incoming, | |
ef0a937f | 813 | if_outgoing, |
fe8bc396 | 814 | forw_packet_pos)) { |
b9dacc52 ML |
815 | forw_packet_aggr = forw_packet_pos; |
816 | break; | |
817 | } | |
818 | } | |
819 | } | |
820 | ||
821 | /* nothing to aggregate with - either aggregation disabled or no | |
9cfc7bd6 SE |
822 | * suitable aggregation packet found |
823 | */ | |
b9dacc52 ML |
824 | if (!forw_packet_aggr) { |
825 | /* the following section can run without the lock */ | |
826 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
827 | ||
9cfc7bd6 | 828 | /* if we could not aggregate this packet with one of the others |
b9dacc52 ML |
829 | * we hold it back for a while, so that it might be aggregated |
830 | * later on | |
831 | */ | |
42d0b044 SE |
832 | if (!own_packet && atomic_read(&bat_priv->aggregated_ogms)) |
833 | send_time += max_aggregation_jiffies; | |
b9dacc52 | 834 | |
fe8bc396 SE |
835 | batadv_iv_ogm_aggregate_new(packet_buff, packet_len, |
836 | send_time, direct_link, | |
ef0a937f SW |
837 | if_incoming, if_outgoing, |
838 | own_packet); | |
b9dacc52 | 839 | } else { |
fe8bc396 SE |
840 | batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, |
841 | packet_len, direct_link); | |
b9dacc52 ML |
842 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
843 | } | |
844 | } | |
845 | ||
56303d34 | 846 | static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, |
fe8bc396 | 847 | const struct ethhdr *ethhdr, |
96412690 | 848 | struct batadv_ogm_packet *batadv_ogm_packet, |
fe8bc396 SE |
849 | bool is_single_hop_neigh, |
850 | bool is_from_best_next_hop, | |
ef0a937f SW |
851 | struct batadv_hard_iface *if_incoming, |
852 | struct batadv_hard_iface *if_outgoing) | |
b9dacc52 | 853 | { |
56303d34 | 854 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
6b5e971a | 855 | u16 tvlv_len; |
b9dacc52 | 856 | |
a40d9b07 | 857 | if (batadv_ogm_packet->ttl <= 1) { |
39c75a51 | 858 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); |
b9dacc52 ML |
859 | return; |
860 | } | |
861 | ||
13b2541b ML |
862 | if (!is_from_best_next_hop) { |
863 | /* Mark the forwarded packet when it is not coming from our | |
864 | * best next hop. We still need to forward the packet for our | |
865 | * neighbor link quality detection to work in case the packet | |
866 | * originated from a single hop neighbor. Otherwise we can | |
867 | * simply drop the ogm. | |
868 | */ | |
869 | if (is_single_hop_neigh) | |
96412690 | 870 | batadv_ogm_packet->flags |= BATADV_NOT_BEST_NEXT_HOP; |
13b2541b ML |
871 | else |
872 | return; | |
873 | } | |
b9dacc52 | 874 | |
ef261577 | 875 | tvlv_len = ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 876 | |
a40d9b07 | 877 | batadv_ogm_packet->ttl--; |
8fdd0153 | 878 | ether_addr_copy(batadv_ogm_packet->prev_sender, ethhdr->h_source); |
b9dacc52 | 879 | |
b9dacc52 | 880 | /* apply hop penalty */ |
96412690 | 881 | batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, |
fe8bc396 | 882 | bat_priv); |
b9dacc52 | 883 | |
39c75a51 | 884 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 885 | "Forwarding packet: tq: %i, ttl: %i\n", |
a40d9b07 | 886 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl); |
b9dacc52 | 887 | |
75cd33f8 | 888 | if (is_single_hop_neigh) |
96412690 | 889 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 890 | else |
96412690 | 891 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 892 | |
96412690 | 893 | batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, |
ef261577 | 894 | BATADV_OGM_HLEN + tvlv_len, |
ef0a937f SW |
895 | if_incoming, if_outgoing, 0, |
896 | batadv_iv_ogm_fwd_send_time()); | |
b9dacc52 ML |
897 | } |
898 | ||
d9896617 AQ |
899 | /** |
900 | * batadv_iv_ogm_slide_own_bcast_window - bitshift own OGM broadcast windows for | |
901 | * the given interface | |
902 | * @hard_iface: the interface for which the windows have to be shifted | |
903 | */ | |
904 | static void | |
905 | batadv_iv_ogm_slide_own_bcast_window(struct batadv_hard_iface *hard_iface) | |
906 | { | |
907 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); | |
908 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
909 | struct hlist_head *head; | |
910 | struct batadv_orig_node *orig_node; | |
911 | unsigned long *word; | |
6b5e971a | 912 | u32 i; |
d9896617 | 913 | size_t word_index; |
6b5e971a | 914 | u8 *w; |
bbad0a5e | 915 | int if_num; |
d9896617 AQ |
916 | |
917 | for (i = 0; i < hash->size; i++) { | |
918 | head = &hash->table[i]; | |
919 | ||
920 | rcu_read_lock(); | |
921 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
bbad0a5e | 922 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 | 923 | word_index = hard_iface->if_num * BATADV_NUM_WORDS; |
32db6aaa | 924 | word = &orig_node->bat_iv.bcast_own[word_index]; |
d9896617 AQ |
925 | |
926 | batadv_bit_get_packet(bat_priv, word, 1, 0); | |
bbad0a5e AQ |
927 | if_num = hard_iface->if_num; |
928 | w = &orig_node->bat_iv.bcast_own_sum[if_num]; | |
d9896617 | 929 | *w = bitmap_weight(word, BATADV_TQ_LOCAL_WINDOW_SIZE); |
bbad0a5e | 930 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 AQ |
931 | } |
932 | rcu_read_unlock(); | |
933 | } | |
934 | } | |
935 | ||
56303d34 | 936 | static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) |
b9dacc52 | 937 | { |
56303d34 | 938 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
14511519 | 939 | unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff; |
96412690 | 940 | struct batadv_ogm_packet *batadv_ogm_packet; |
ef0a937f | 941 | struct batadv_hard_iface *primary_if, *tmp_hard_iface; |
14511519 | 942 | int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len; |
6b5e971a SE |
943 | u32 seqno; |
944 | u16 tvlv_len = 0; | |
ef0a937f | 945 | unsigned long send_time; |
b9dacc52 | 946 | |
f0d97253 AQ |
947 | if ((hard_iface->if_status == BATADV_IF_NOT_IN_USE) || |
948 | (hard_iface->if_status == BATADV_IF_TO_BE_REMOVED)) | |
949 | return; | |
950 | ||
951 | /* the interface gets activated here to avoid race conditions between | |
952 | * the moment of activating the interface in | |
953 | * hardif_activate_interface() where the originator mac is set and | |
954 | * outdated packets (especially uninitialized mac addresses) in the | |
955 | * packet queue | |
956 | */ | |
957 | if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED) | |
958 | hard_iface->if_status = BATADV_IF_ACTIVE; | |
959 | ||
e5d89254 | 960 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 | 961 | |
e1bf0c14 ML |
962 | if (hard_iface == primary_if) { |
963 | /* tt changes have to be committed before the tvlv data is | |
964 | * appended as it may alter the tt tvlv container | |
965 | */ | |
966 | batadv_tt_local_commit_changes(bat_priv); | |
ef261577 ML |
967 | tvlv_len = batadv_tvlv_container_ogm_append(bat_priv, ogm_buff, |
968 | ogm_buff_len, | |
969 | BATADV_OGM_HLEN); | |
e1bf0c14 | 970 | } |
be9aa4c1 | 971 | |
14511519 | 972 | batadv_ogm_packet = (struct batadv_ogm_packet *)(*ogm_buff); |
ef261577 | 973 | batadv_ogm_packet->tvlv_len = htons(tvlv_len); |
b9dacc52 ML |
974 | |
975 | /* change sequence number to network order */ | |
6b5e971a | 976 | seqno = (u32)atomic_read(&hard_iface->bat_iv.ogm_seqno); |
bbb1f90e | 977 | batadv_ogm_packet->seqno = htonl(seqno); |
14511519 | 978 | atomic_inc(&hard_iface->bat_iv.ogm_seqno); |
b9dacc52 | 979 | |
d9896617 | 980 | batadv_iv_ogm_slide_own_bcast_window(hard_iface); |
b9dacc52 | 981 | |
ef0a937f SW |
982 | send_time = batadv_iv_ogm_emit_send_time(bat_priv); |
983 | ||
984 | if (hard_iface != primary_if) { | |
985 | /* OGMs from secondary interfaces are only scheduled on their | |
986 | * respective interfaces. | |
987 | */ | |
988 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, *ogm_buff_len, | |
989 | hard_iface, hard_iface, 1, send_time); | |
990 | goto out; | |
991 | } | |
992 | ||
993 | /* OGMs from primary interfaces are scheduled on all | |
994 | * interfaces. | |
995 | */ | |
996 | rcu_read_lock(); | |
997 | list_for_each_entry_rcu(tmp_hard_iface, &batadv_hardif_list, list) { | |
998 | if (tmp_hard_iface->soft_iface != hard_iface->soft_iface) | |
87b40f53 | 999 | continue; |
27353446 SE |
1000 | |
1001 | if (!kref_get_unless_zero(&tmp_hard_iface->refcount)) | |
1002 | continue; | |
1003 | ||
ef0a937f SW |
1004 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, |
1005 | *ogm_buff_len, hard_iface, | |
1006 | tmp_hard_iface, 1, send_time); | |
27353446 SE |
1007 | |
1008 | batadv_hardif_put(tmp_hard_iface); | |
ef0a937f SW |
1009 | } |
1010 | rcu_read_unlock(); | |
1011 | ||
1012 | out: | |
b9dacc52 | 1013 | if (primary_if) |
82047ad7 | 1014 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
1015 | } |
1016 | ||
89652331 SW |
1017 | /** |
1018 | * batadv_iv_ogm_orig_update - use OGM to update corresponding data in an | |
1019 | * originator | |
1020 | * @bat_priv: the bat priv with all the soft interface information | |
1021 | * @orig_node: the orig node who originally emitted the ogm packet | |
7351a482 | 1022 | * @orig_ifinfo: ifinfo for the outgoing interface of the orig_node |
89652331 SW |
1023 | * @ethhdr: Ethernet header of the OGM |
1024 | * @batadv_ogm_packet: the ogm packet | |
1025 | * @if_incoming: interface where the packet was received | |
1026 | * @if_outgoing: interface for which the retransmission should be considered | |
89652331 SW |
1027 | * @dup_status: the duplicate status of this ogm packet. |
1028 | */ | |
fe8bc396 | 1029 | static void |
56303d34 SE |
1030 | batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, |
1031 | struct batadv_orig_node *orig_node, | |
7351a482 | 1032 | struct batadv_orig_ifinfo *orig_ifinfo, |
fe8bc396 | 1033 | const struct ethhdr *ethhdr, |
96412690 | 1034 | const struct batadv_ogm_packet *batadv_ogm_packet, |
56303d34 | 1035 | struct batadv_hard_iface *if_incoming, |
89652331 | 1036 | struct batadv_hard_iface *if_outgoing, |
7c24bbbe | 1037 | enum batadv_dup_status dup_status) |
fc957275 | 1038 | { |
89652331 SW |
1039 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL; |
1040 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
4f248cff SE |
1041 | struct batadv_neigh_node *neigh_node = NULL; |
1042 | struct batadv_neigh_node *tmp_neigh_node = NULL; | |
56303d34 SE |
1043 | struct batadv_neigh_node *router = NULL; |
1044 | struct batadv_orig_node *orig_node_tmp; | |
7caf69fb | 1045 | int if_num; |
6b5e971a SE |
1046 | u8 sum_orig, sum_neigh; |
1047 | u8 *neigh_addr; | |
1048 | u8 tq_avg; | |
fc957275 | 1049 | |
39c75a51 | 1050 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1051 | "update_originator(): Searching and updating originator entry of received packet\n"); |
fc957275 ML |
1052 | |
1053 | rcu_read_lock(); | |
b67bfe0d | 1054 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 1055 | &orig_node->neigh_list, list) { |
1eda58bf SE |
1056 | neigh_addr = tmp_neigh_node->addr; |
1057 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && | |
1058 | tmp_neigh_node->if_incoming == if_incoming && | |
77ae32e8 | 1059 | kref_get_unless_zero(&tmp_neigh_node->refcount)) { |
38dc40ef | 1060 | if (WARN(neigh_node, "too many matching neigh_nodes")) |
25bb2509 | 1061 | batadv_neigh_node_put(neigh_node); |
fc957275 ML |
1062 | neigh_node = tmp_neigh_node; |
1063 | continue; | |
1064 | } | |
1065 | ||
7c24bbbe | 1066 | if (dup_status != BATADV_NO_DUP) |
fc957275 ML |
1067 | continue; |
1068 | ||
89652331 SW |
1069 | /* only update the entry for this outgoing interface */ |
1070 | neigh_ifinfo = batadv_neigh_ifinfo_get(tmp_neigh_node, | |
1071 | if_outgoing); | |
1072 | if (!neigh_ifinfo) | |
1073 | continue; | |
1074 | ||
1075 | spin_lock_bh(&tmp_neigh_node->ifinfo_lock); | |
1076 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1077 | &neigh_ifinfo->bat_iv.tq_index, 0); | |
1078 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); | |
1079 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1080 | spin_unlock_bh(&tmp_neigh_node->ifinfo_lock); | |
1081 | ||
044fa3ae | 1082 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 1083 | neigh_ifinfo = NULL; |
fc957275 ML |
1084 | } |
1085 | ||
1086 | if (!neigh_node) { | |
56303d34 | 1087 | struct batadv_orig_node *orig_tmp; |
fc957275 | 1088 | |
bbad0a5e | 1089 | orig_tmp = batadv_iv_ogm_orig_get(bat_priv, ethhdr->h_source); |
fc957275 ML |
1090 | if (!orig_tmp) |
1091 | goto unlock; | |
1092 | ||
fe8bc396 SE |
1093 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1094 | ethhdr->h_source, | |
863dd7a8 | 1095 | orig_node, orig_tmp); |
fc957275 | 1096 | |
5d967310 | 1097 | batadv_orig_node_put(orig_tmp); |
fc957275 ML |
1098 | if (!neigh_node) |
1099 | goto unlock; | |
23badd6d | 1100 | } else { |
39c75a51 | 1101 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1102 | "Updating existing last-hop neighbor of originator\n"); |
23badd6d | 1103 | } |
fc957275 ML |
1104 | |
1105 | rcu_read_unlock(); | |
89652331 SW |
1106 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1107 | if (!neigh_ifinfo) | |
1108 | goto out; | |
fc957275 | 1109 | |
d7b2a97e | 1110 | neigh_node->last_seen = jiffies; |
fc957275 | 1111 | |
89652331 SW |
1112 | spin_lock_bh(&neigh_node->ifinfo_lock); |
1113 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1114 | &neigh_ifinfo->bat_iv.tq_index, | |
96412690 | 1115 | batadv_ogm_packet->tq); |
89652331 SW |
1116 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); |
1117 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1118 | spin_unlock_bh(&neigh_node->ifinfo_lock); | |
fc957275 | 1119 | |
7c24bbbe | 1120 | if (dup_status == BATADV_NO_DUP) { |
7351a482 | 1121 | orig_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
89652331 | 1122 | neigh_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
fc957275 ML |
1123 | } |
1124 | ||
fc957275 | 1125 | /* if this neighbor already is our next hop there is nothing |
9cfc7bd6 SE |
1126 | * to change |
1127 | */ | |
7351a482 | 1128 | router = batadv_orig_router_get(orig_node, if_outgoing); |
fc957275 | 1129 | if (router == neigh_node) |
e1bf0c14 | 1130 | goto out; |
fc957275 | 1131 | |
89652331 SW |
1132 | if (router) { |
1133 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
1134 | if (!router_ifinfo) | |
1135 | goto out; | |
1136 | ||
1137 | /* if this neighbor does not offer a better TQ we won't | |
1138 | * consider it | |
1139 | */ | |
1140 | if (router_ifinfo->bat_iv.tq_avg > neigh_ifinfo->bat_iv.tq_avg) | |
1141 | goto out; | |
1142 | } | |
fc957275 ML |
1143 | |
1144 | /* if the TQ is the same and the link not more symmetric we | |
9cfc7bd6 SE |
1145 | * won't consider it either |
1146 | */ | |
89652331 | 1147 | if (router_ifinfo && |
01b97a3e | 1148 | neigh_ifinfo->bat_iv.tq_avg == router_ifinfo->bat_iv.tq_avg) { |
fc957275 | 1149 | orig_node_tmp = router->orig_node; |
bbad0a5e | 1150 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1151 | if_num = router->if_incoming->if_num; |
bbad0a5e AQ |
1152 | sum_orig = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1153 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 ML |
1154 | |
1155 | orig_node_tmp = neigh_node->orig_node; | |
bbad0a5e | 1156 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1157 | if_num = neigh_node->if_incoming->if_num; |
bbad0a5e AQ |
1158 | sum_neigh = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1159 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 | 1160 | |
bbb1f90e | 1161 | if (sum_orig >= sum_neigh) |
e1bf0c14 | 1162 | goto out; |
fc957275 ML |
1163 | } |
1164 | ||
7351a482 | 1165 | batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node); |
fc957275 ML |
1166 | goto out; |
1167 | ||
1168 | unlock: | |
1169 | rcu_read_unlock(); | |
1170 | out: | |
1171 | if (neigh_node) | |
25bb2509 | 1172 | batadv_neigh_node_put(neigh_node); |
fc957275 | 1173 | if (router) |
25bb2509 | 1174 | batadv_neigh_node_put(router); |
89652331 | 1175 | if (neigh_ifinfo) |
044fa3ae | 1176 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 1177 | if (router_ifinfo) |
044fa3ae | 1178 | batadv_neigh_ifinfo_put(router_ifinfo); |
fc957275 ML |
1179 | } |
1180 | ||
89652331 SW |
1181 | /** |
1182 | * batadv_iv_ogm_calc_tq - calculate tq for current received ogm packet | |
1183 | * @orig_node: the orig node who originally emitted the ogm packet | |
1184 | * @orig_neigh_node: the orig node struct of the neighbor who sent the packet | |
1185 | * @batadv_ogm_packet: the ogm packet | |
1186 | * @if_incoming: interface where the packet was received | |
1187 | * @if_outgoing: interface for which the retransmission should be considered | |
1188 | * | |
4b426b10 | 1189 | * Return: true if the link can be considered bidirectional, false otherwise |
89652331 | 1190 | */ |
4b426b10 SE |
1191 | static bool batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, |
1192 | struct batadv_orig_node *orig_neigh_node, | |
1193 | struct batadv_ogm_packet *batadv_ogm_packet, | |
1194 | struct batadv_hard_iface *if_incoming, | |
1195 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1196 | { |
56303d34 SE |
1197 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1198 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; | |
89652331 | 1199 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
6b5e971a SE |
1200 | u8 total_count; |
1201 | u8 orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; | |
42d0b044 | 1202 | unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; |
d285f52c SE |
1203 | int if_num; |
1204 | unsigned int tq_asym_penalty, inv_asym_penalty; | |
42d0b044 | 1205 | unsigned int combined_tq; |
d285f52c | 1206 | unsigned int tq_iface_penalty; |
4b426b10 | 1207 | bool ret = false; |
fc957275 ML |
1208 | |
1209 | /* find corresponding one hop neighbor */ | |
1210 | rcu_read_lock(); | |
b67bfe0d | 1211 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 1212 | &orig_neigh_node->neigh_list, list) { |
1eda58bf SE |
1213 | if (!batadv_compare_eth(tmp_neigh_node->addr, |
1214 | orig_neigh_node->orig)) | |
fc957275 ML |
1215 | continue; |
1216 | ||
1217 | if (tmp_neigh_node->if_incoming != if_incoming) | |
1218 | continue; | |
1219 | ||
77ae32e8 | 1220 | if (!kref_get_unless_zero(&tmp_neigh_node->refcount)) |
fc957275 ML |
1221 | continue; |
1222 | ||
1223 | neigh_node = tmp_neigh_node; | |
1224 | break; | |
1225 | } | |
1226 | rcu_read_unlock(); | |
1227 | ||
1228 | if (!neigh_node) | |
fe8bc396 SE |
1229 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1230 | orig_neigh_node->orig, | |
1231 | orig_neigh_node, | |
863dd7a8 | 1232 | orig_neigh_node); |
fc957275 ML |
1233 | |
1234 | if (!neigh_node) | |
1235 | goto out; | |
1236 | ||
d7b2a97e | 1237 | /* if orig_node is direct neighbor update neigh_node last_seen */ |
fc957275 | 1238 | if (orig_node == orig_neigh_node) |
d7b2a97e | 1239 | neigh_node->last_seen = jiffies; |
fc957275 | 1240 | |
d7b2a97e | 1241 | orig_node->last_seen = jiffies; |
fc957275 ML |
1242 | |
1243 | /* find packet count of corresponding one hop neighbor */ | |
bbad0a5e AQ |
1244 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
1245 | if_num = if_incoming->if_num; | |
1246 | orig_eq_count = orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
89652331 SW |
1247 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1248 | if (neigh_ifinfo) { | |
1249 | neigh_rq_count = neigh_ifinfo->bat_iv.real_packet_count; | |
044fa3ae | 1250 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 SW |
1251 | } else { |
1252 | neigh_rq_count = 0; | |
1253 | } | |
bbad0a5e | 1254 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
fc957275 ML |
1255 | |
1256 | /* pay attention to not get a value bigger than 100 % */ | |
c67893d1 SE |
1257 | if (orig_eq_count > neigh_rq_count) |
1258 | total_count = neigh_rq_count; | |
1259 | else | |
1260 | total_count = orig_eq_count; | |
fc957275 | 1261 | |
9cfc7bd6 SE |
1262 | /* if we have too few packets (too less data) we set tq_own to zero |
1263 | * if we receive too few packets it is not considered bidirectional | |
1264 | */ | |
42d0b044 SE |
1265 | if (total_count < BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM || |
1266 | neigh_rq_count < BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM) | |
fc957275 ML |
1267 | tq_own = 0; |
1268 | else | |
1269 | /* neigh_node->real_packet_count is never zero as we | |
1270 | * only purge old information when getting new | |
9cfc7bd6 SE |
1271 | * information |
1272 | */ | |
42d0b044 | 1273 | tq_own = (BATADV_TQ_MAX_VALUE * total_count) / neigh_rq_count; |
fc957275 | 1274 | |
21a1236b | 1275 | /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does |
fc957275 ML |
1276 | * affect the nearly-symmetric links only a little, but |
1277 | * punishes asymmetric links more. This will give a value | |
1278 | * between 0 and TQ_MAX_VALUE | |
1279 | */ | |
42d0b044 SE |
1280 | neigh_rq_inv = BATADV_TQ_LOCAL_WINDOW_SIZE - neigh_rq_count; |
1281 | neigh_rq_inv_cube = neigh_rq_inv * neigh_rq_inv * neigh_rq_inv; | |
1282 | neigh_rq_max_cube = BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1283 | BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1284 | BATADV_TQ_LOCAL_WINDOW_SIZE; | |
1285 | inv_asym_penalty = BATADV_TQ_MAX_VALUE * neigh_rq_inv_cube; | |
1286 | inv_asym_penalty /= neigh_rq_max_cube; | |
1287 | tq_asym_penalty = BATADV_TQ_MAX_VALUE - inv_asym_penalty; | |
1288 | ||
c0398768 SW |
1289 | /* penalize if the OGM is forwarded on the same interface. WiFi |
1290 | * interfaces and other half duplex devices suffer from throughput | |
1291 | * drops as they can't send and receive at the same time. | |
1292 | */ | |
1293 | tq_iface_penalty = BATADV_TQ_MAX_VALUE; | |
1294 | if (if_outgoing && (if_incoming == if_outgoing) && | |
1295 | batadv_is_wifi_netdev(if_outgoing->net_dev)) | |
1296 | tq_iface_penalty = batadv_hop_penalty(BATADV_TQ_MAX_VALUE, | |
1297 | bat_priv); | |
1298 | ||
1299 | combined_tq = batadv_ogm_packet->tq * | |
1300 | tq_own * | |
1301 | tq_asym_penalty * | |
1302 | tq_iface_penalty; | |
1303 | combined_tq /= BATADV_TQ_MAX_VALUE * | |
1304 | BATADV_TQ_MAX_VALUE * | |
1305 | BATADV_TQ_MAX_VALUE; | |
96412690 | 1306 | batadv_ogm_packet->tq = combined_tq; |
fc957275 | 1307 | |
39c75a51 | 1308 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
c0398768 | 1309 | "bidirectional: orig = %-15pM neigh = %-15pM => own_bcast = %2i, real recv = %2i, local tq: %3i, asym_penalty: %3i, iface_penalty: %3i, total tq: %3i, if_incoming = %s, if_outgoing = %s\n", |
1eda58bf | 1310 | orig_node->orig, orig_neigh_node->orig, total_count, |
c0398768 SW |
1311 | neigh_rq_count, tq_own, tq_asym_penalty, tq_iface_penalty, |
1312 | batadv_ogm_packet->tq, if_incoming->net_dev->name, | |
1313 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT"); | |
fc957275 ML |
1314 | |
1315 | /* if link has the minimum required transmission quality | |
9cfc7bd6 SE |
1316 | * consider it bidirectional |
1317 | */ | |
96412690 | 1318 | if (batadv_ogm_packet->tq >= BATADV_TQ_TOTAL_BIDRECT_LIMIT) |
4b426b10 | 1319 | ret = true; |
fc957275 ML |
1320 | |
1321 | out: | |
1322 | if (neigh_node) | |
25bb2509 | 1323 | batadv_neigh_node_put(neigh_node); |
fc957275 ML |
1324 | return ret; |
1325 | } | |
1326 | ||
7c24bbbe SW |
1327 | /** |
1328 | * batadv_iv_ogm_update_seqnos - process a batman packet for all interfaces, | |
1329 | * adjust the sequence number and find out whether it is a duplicate | |
1330 | * @ethhdr: ethernet header of the packet | |
1331 | * @batadv_ogm_packet: OGM packet to be considered | |
1332 | * @if_incoming: interface on which the OGM packet was received | |
89652331 | 1333 | * @if_outgoing: interface for which the retransmission should be considered |
7c24bbbe | 1334 | * |
62fe710f | 1335 | * Return: duplicate status as enum batadv_dup_status |
fc957275 | 1336 | */ |
7c24bbbe | 1337 | static enum batadv_dup_status |
fe8bc396 | 1338 | batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, |
96412690 | 1339 | const struct batadv_ogm_packet *batadv_ogm_packet, |
89652331 SW |
1340 | const struct batadv_hard_iface *if_incoming, |
1341 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1342 | { |
56303d34 SE |
1343 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1344 | struct batadv_orig_node *orig_node; | |
7351a482 | 1345 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; |
89652331 SW |
1346 | struct batadv_neigh_node *neigh_node; |
1347 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
4b426b10 | 1348 | bool is_dup; |
6b5e971a | 1349 | s32 seq_diff; |
4b426b10 | 1350 | bool need_update = false; |
7c24bbbe SW |
1351 | int set_mark; |
1352 | enum batadv_dup_status ret = BATADV_NO_DUP; | |
6b5e971a SE |
1353 | u32 seqno = ntohl(batadv_ogm_packet->seqno); |
1354 | u8 *neigh_addr; | |
1355 | u8 packet_count; | |
0538f759 | 1356 | unsigned long *bitmap; |
fc957275 | 1357 | |
bbad0a5e | 1358 | orig_node = batadv_iv_ogm_orig_get(bat_priv, batadv_ogm_packet->orig); |
fc957275 | 1359 | if (!orig_node) |
7c24bbbe | 1360 | return BATADV_NO_DUP; |
fc957275 | 1361 | |
7351a482 SW |
1362 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1363 | if (WARN_ON(!orig_ifinfo)) { | |
5d967310 | 1364 | batadv_orig_node_put(orig_node); |
7351a482 SW |
1365 | return 0; |
1366 | } | |
1367 | ||
bbad0a5e | 1368 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
7351a482 | 1369 | seq_diff = seqno - orig_ifinfo->last_real_seqno; |
fc957275 ML |
1370 | |
1371 | /* signalize caller that the packet is to be dropped. */ | |
1e5cc266 | 1372 | if (!hlist_empty(&orig_node->neigh_list) && |
30d3c511 | 1373 | batadv_window_protected(bat_priv, seq_diff, |
81f02683 SW |
1374 | BATADV_TQ_LOCAL_WINDOW_SIZE, |
1375 | &orig_ifinfo->batman_seqno_reset, NULL)) { | |
7c24bbbe | 1376 | ret = BATADV_PROTECTED; |
fc957275 | 1377 | goto out; |
7c24bbbe | 1378 | } |
fc957275 ML |
1379 | |
1380 | rcu_read_lock(); | |
89652331 SW |
1381 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { |
1382 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, | |
1383 | if_outgoing); | |
1384 | if (!neigh_ifinfo) | |
1385 | continue; | |
1386 | ||
1387 | neigh_addr = neigh_node->addr; | |
1388 | is_dup = batadv_test_bit(neigh_ifinfo->bat_iv.real_bits, | |
7351a482 | 1389 | orig_ifinfo->last_real_seqno, |
7c24bbbe SW |
1390 | seqno); |
1391 | ||
1eda58bf | 1392 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
89652331 | 1393 | neigh_node->if_incoming == if_incoming) { |
fc957275 | 1394 | set_mark = 1; |
7c24bbbe SW |
1395 | if (is_dup) |
1396 | ret = BATADV_NEIGH_DUP; | |
1397 | } else { | |
fc957275 | 1398 | set_mark = 0; |
7c24bbbe SW |
1399 | if (is_dup && (ret != BATADV_NEIGH_DUP)) |
1400 | ret = BATADV_ORIG_DUP; | |
1401 | } | |
fc957275 ML |
1402 | |
1403 | /* if the window moved, set the update flag. */ | |
89652331 | 1404 | bitmap = neigh_ifinfo->bat_iv.real_bits; |
0538f759 | 1405 | need_update |= batadv_bit_get_packet(bat_priv, bitmap, |
0f5f9322 | 1406 | seq_diff, set_mark); |
fc957275 | 1407 | |
89652331 | 1408 | packet_count = bitmap_weight(bitmap, |
bbb1f90e | 1409 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
89652331 | 1410 | neigh_ifinfo->bat_iv.real_packet_count = packet_count; |
044fa3ae | 1411 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
fc957275 ML |
1412 | } |
1413 | rcu_read_unlock(); | |
1414 | ||
1415 | if (need_update) { | |
39c75a51 | 1416 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
7351a482 SW |
1417 | "%s updating last_seqno: old %u, new %u\n", |
1418 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT", | |
1419 | orig_ifinfo->last_real_seqno, seqno); | |
1420 | orig_ifinfo->last_real_seqno = seqno; | |
fc957275 ML |
1421 | } |
1422 | ||
fc957275 | 1423 | out: |
bbad0a5e | 1424 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
5d967310 | 1425 | batadv_orig_node_put(orig_node); |
35f94779 | 1426 | batadv_orig_ifinfo_put(orig_ifinfo); |
fc957275 ML |
1427 | return ret; |
1428 | } | |
1429 | ||
7351a482 SW |
1430 | /** |
1431 | * batadv_iv_ogm_process_per_outif - process a batman iv OGM for an outgoing if | |
1432 | * @skb: the skb containing the OGM | |
95298a91 | 1433 | * @ogm_offset: offset from skb->data to start of ogm header |
7351a482 SW |
1434 | * @orig_node: the (cached) orig node for the originator of this OGM |
1435 | * @if_incoming: the interface where this packet was received | |
1436 | * @if_outgoing: the interface for which the packet should be considered | |
1437 | */ | |
1438 | static void | |
1439 | batadv_iv_ogm_process_per_outif(const struct sk_buff *skb, int ogm_offset, | |
1440 | struct batadv_orig_node *orig_node, | |
1441 | struct batadv_hard_iface *if_incoming, | |
1442 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1443 | { |
56303d34 | 1444 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
4ff1e2a7 | 1445 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
4f248cff SE |
1446 | struct batadv_neigh_node *router = NULL; |
1447 | struct batadv_neigh_node *router_router = NULL; | |
7351a482 SW |
1448 | struct batadv_orig_node *orig_neigh_node; |
1449 | struct batadv_orig_ifinfo *orig_ifinfo; | |
56303d34 | 1450 | struct batadv_neigh_node *orig_neigh_router = NULL; |
89652331 | 1451 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
7351a482 | 1452 | struct batadv_ogm_packet *ogm_packet; |
7c24bbbe | 1453 | enum batadv_dup_status dup_status; |
7351a482 SW |
1454 | bool is_from_best_next_hop = false; |
1455 | bool is_single_hop_neigh = false; | |
1456 | bool sameseq, similar_ttl; | |
1457 | struct sk_buff *skb_priv; | |
1458 | struct ethhdr *ethhdr; | |
6b5e971a | 1459 | u8 *prev_sender; |
4b426b10 | 1460 | bool is_bidirect; |
fc957275 | 1461 | |
7351a482 SW |
1462 | /* create a private copy of the skb, as some functions change tq value |
1463 | * and/or flags. | |
fc957275 | 1464 | */ |
7351a482 SW |
1465 | skb_priv = skb_copy(skb, GFP_ATOMIC); |
1466 | if (!skb_priv) | |
fc957275 ML |
1467 | return; |
1468 | ||
7351a482 SW |
1469 | ethhdr = eth_hdr(skb_priv); |
1470 | ogm_packet = (struct batadv_ogm_packet *)(skb_priv->data + ogm_offset); | |
fc957275 | 1471 | |
7351a482 SW |
1472 | dup_status = batadv_iv_ogm_update_seqnos(ethhdr, ogm_packet, |
1473 | if_incoming, if_outgoing); | |
1474 | if (batadv_compare_eth(ethhdr->h_source, ogm_packet->orig)) | |
75cd33f8 | 1475 | is_single_hop_neigh = true; |
fc957275 | 1476 | |
7c24bbbe | 1477 | if (dup_status == BATADV_PROTECTED) { |
39c75a51 | 1478 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1479 | "Drop packet: packet within seqno protection time (sender: %pM)\n", |
1480 | ethhdr->h_source); | |
fc957275 ML |
1481 | goto out; |
1482 | } | |
1483 | ||
7351a482 | 1484 | if (ogm_packet->tq == 0) { |
39c75a51 | 1485 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1486 | "Drop packet: originator packet with tq equal 0\n"); |
fc957275 ML |
1487 | goto out; |
1488 | } | |
1489 | ||
4ff1e2a7 ML |
1490 | if (is_single_hop_neigh) { |
1491 | hardif_neigh = batadv_hardif_neigh_get(if_incoming, | |
1492 | ethhdr->h_source); | |
1493 | if (hardif_neigh) | |
1494 | hardif_neigh->last_seen = jiffies; | |
1495 | } | |
1496 | ||
7351a482 | 1497 | router = batadv_orig_router_get(orig_node, if_outgoing); |
0538f759 | 1498 | if (router) { |
7351a482 SW |
1499 | router_router = batadv_orig_router_get(router->orig_node, |
1500 | if_outgoing); | |
1501 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
0538f759 | 1502 | } |
fc957275 | 1503 | |
7351a482 | 1504 | if ((router_ifinfo && router_ifinfo->bat_iv.tq_avg != 0) && |
1eda58bf | 1505 | (batadv_compare_eth(router->addr, ethhdr->h_source))) |
13b2541b ML |
1506 | is_from_best_next_hop = true; |
1507 | ||
7351a482 | 1508 | prev_sender = ogm_packet->prev_sender; |
fc957275 ML |
1509 | /* avoid temporary routing loops */ |
1510 | if (router && router_router && | |
1eda58bf | 1511 | (batadv_compare_eth(router->addr, prev_sender)) && |
7351a482 | 1512 | !(batadv_compare_eth(ogm_packet->orig, prev_sender)) && |
1eda58bf | 1513 | (batadv_compare_eth(router->addr, router_router->addr))) { |
39c75a51 | 1514 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1515 | "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", |
1516 | ethhdr->h_source); | |
fc957275 ML |
1517 | goto out; |
1518 | } | |
1519 | ||
7351a482 SW |
1520 | if (if_outgoing == BATADV_IF_DEFAULT) |
1521 | batadv_tvlv_ogm_receive(bat_priv, ogm_packet, orig_node); | |
ef261577 | 1522 | |
fc957275 | 1523 | /* if sender is a direct neighbor the sender mac equals |
9cfc7bd6 SE |
1524 | * originator mac |
1525 | */ | |
c67893d1 SE |
1526 | if (is_single_hop_neigh) |
1527 | orig_neigh_node = orig_node; | |
1528 | else | |
bbad0a5e AQ |
1529 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, |
1530 | ethhdr->h_source); | |
c67893d1 | 1531 | |
fc957275 ML |
1532 | if (!orig_neigh_node) |
1533 | goto out; | |
1534 | ||
d56b1705 MH |
1535 | /* Update nc_nodes of the originator */ |
1536 | batadv_nc_update_nc_node(bat_priv, orig_node, orig_neigh_node, | |
7351a482 | 1537 | ogm_packet, is_single_hop_neigh); |
d56b1705 | 1538 | |
7351a482 SW |
1539 | orig_neigh_router = batadv_orig_router_get(orig_neigh_node, |
1540 | if_outgoing); | |
fc957275 ML |
1541 | |
1542 | /* drop packet if sender is not a direct neighbor and if we | |
9cfc7bd6 SE |
1543 | * don't route towards it |
1544 | */ | |
fc957275 | 1545 | if (!is_single_hop_neigh && (!orig_neigh_router)) { |
39c75a51 | 1546 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1547 | "Drop packet: OGM via unknown neighbor!\n"); |
fc957275 ML |
1548 | goto out_neigh; |
1549 | } | |
1550 | ||
fe8bc396 | 1551 | is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, |
7351a482 SW |
1552 | ogm_packet, if_incoming, |
1553 | if_outgoing); | |
fc957275 | 1554 | |
fc957275 | 1555 | /* update ranking if it is not a duplicate or has the same |
9cfc7bd6 SE |
1556 | * seqno and similar ttl as the non-duplicate |
1557 | */ | |
7351a482 SW |
1558 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1559 | if (!orig_ifinfo) | |
1560 | goto out_neigh; | |
1561 | ||
1562 | sameseq = orig_ifinfo->last_real_seqno == ntohl(ogm_packet->seqno); | |
1563 | similar_ttl = (orig_ifinfo->last_ttl - 3) <= ogm_packet->ttl; | |
1564 | ||
7c24bbbe | 1565 | if (is_bidirect && ((dup_status == BATADV_NO_DUP) || |
7351a482 SW |
1566 | (sameseq && similar_ttl))) { |
1567 | batadv_iv_ogm_orig_update(bat_priv, orig_node, | |
1568 | orig_ifinfo, ethhdr, | |
1569 | ogm_packet, if_incoming, | |
1570 | if_outgoing, dup_status); | |
1571 | } | |
35f94779 | 1572 | batadv_orig_ifinfo_put(orig_ifinfo); |
fc957275 | 1573 | |
ef0a937f SW |
1574 | /* only forward for specific interface, not for the default one. */ |
1575 | if (if_outgoing == BATADV_IF_DEFAULT) | |
1576 | goto out_neigh; | |
1577 | ||
fc957275 ML |
1578 | /* is single hop (direct) neighbor */ |
1579 | if (is_single_hop_neigh) { | |
7351a482 SW |
1580 | /* OGMs from secondary interfaces should only scheduled once |
1581 | * per interface where it has been received, not multiple times | |
1582 | */ | |
1583 | if ((ogm_packet->ttl <= 2) && | |
1584 | (if_incoming != if_outgoing)) { | |
1585 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1586 | "Drop packet: OGM from secondary interface and wrong outgoing interface\n"); | |
1587 | goto out_neigh; | |
1588 | } | |
fc957275 | 1589 | /* mark direct link on incoming interface */ |
7351a482 | 1590 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1591 | is_single_hop_neigh, |
ef0a937f SW |
1592 | is_from_best_next_hop, if_incoming, |
1593 | if_outgoing); | |
fc957275 | 1594 | |
39c75a51 | 1595 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1596 | "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); |
fc957275 ML |
1597 | goto out_neigh; |
1598 | } | |
1599 | ||
1600 | /* multihop originator */ | |
fe8bc396 | 1601 | if (!is_bidirect) { |
39c75a51 | 1602 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1603 | "Drop packet: not received via bidirectional link\n"); |
fc957275 ML |
1604 | goto out_neigh; |
1605 | } | |
1606 | ||
7c24bbbe | 1607 | if (dup_status == BATADV_NEIGH_DUP) { |
39c75a51 | 1608 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1609 | "Drop packet: duplicate packet received\n"); |
fc957275 ML |
1610 | goto out_neigh; |
1611 | } | |
1612 | ||
39c75a51 | 1613 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1614 | "Forwarding packet: rebroadcast originator packet\n"); |
7351a482 | 1615 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1616 | is_single_hop_neigh, is_from_best_next_hop, |
ef0a937f | 1617 | if_incoming, if_outgoing); |
fc957275 ML |
1618 | |
1619 | out_neigh: | |
1620 | if ((orig_neigh_node) && (!is_single_hop_neigh)) | |
5d967310 | 1621 | batadv_orig_node_put(orig_neigh_node); |
fc957275 | 1622 | out: |
c1e517fb | 1623 | if (router_ifinfo) |
044fa3ae | 1624 | batadv_neigh_ifinfo_put(router_ifinfo); |
fc957275 | 1625 | if (router) |
25bb2509 | 1626 | batadv_neigh_node_put(router); |
fc957275 | 1627 | if (router_router) |
25bb2509 | 1628 | batadv_neigh_node_put(router_router); |
fc957275 | 1629 | if (orig_neigh_router) |
25bb2509 | 1630 | batadv_neigh_node_put(orig_neigh_router); |
4ff1e2a7 | 1631 | if (hardif_neigh) |
accadc35 | 1632 | batadv_hardif_neigh_put(hardif_neigh); |
fc957275 | 1633 | |
7351a482 SW |
1634 | kfree_skb(skb_priv); |
1635 | } | |
1636 | ||
1637 | /** | |
1638 | * batadv_iv_ogm_process - process an incoming batman iv OGM | |
1639 | * @skb: the skb containing the OGM | |
1640 | * @ogm_offset: offset to the OGM which should be processed (for aggregates) | |
1641 | * @if_incoming: the interface where this packet was receved | |
1642 | */ | |
1643 | static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset, | |
1644 | struct batadv_hard_iface *if_incoming) | |
1645 | { | |
1646 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); | |
1647 | struct batadv_orig_node *orig_neigh_node, *orig_node; | |
1648 | struct batadv_hard_iface *hard_iface; | |
1649 | struct batadv_ogm_packet *ogm_packet; | |
6b5e971a | 1650 | u32 if_incoming_seqno; |
7351a482 SW |
1651 | bool has_directlink_flag; |
1652 | struct ethhdr *ethhdr; | |
1653 | bool is_my_oldorig = false; | |
1654 | bool is_my_addr = false; | |
1655 | bool is_my_orig = false; | |
1656 | ||
1657 | ogm_packet = (struct batadv_ogm_packet *)(skb->data + ogm_offset); | |
1658 | ethhdr = eth_hdr(skb); | |
1659 | ||
1660 | /* Silently drop when the batman packet is actually not a | |
1661 | * correct packet. | |
1662 | * | |
1663 | * This might happen if a packet is padded (e.g. Ethernet has a | |
1664 | * minimum frame length of 64 byte) and the aggregation interprets | |
1665 | * it as an additional length. | |
1666 | * | |
1667 | * TODO: A more sane solution would be to have a bit in the | |
1668 | * batadv_ogm_packet to detect whether the packet is the last | |
1669 | * packet in an aggregation. Here we expect that the padding | |
1670 | * is always zero (or not 0x01) | |
1671 | */ | |
1672 | if (ogm_packet->packet_type != BATADV_IV_OGM) | |
1673 | return; | |
1674 | ||
1675 | /* could be changed by schedule_own_packet() */ | |
1676 | if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); | |
1677 | ||
1678 | if (ogm_packet->flags & BATADV_DIRECTLINK) | |
1679 | has_directlink_flag = true; | |
1680 | else | |
1681 | has_directlink_flag = false; | |
1682 | ||
1683 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1684 | "Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %u, tq %d, TTL %d, V %d, IDF %d)\n", | |
1685 | ethhdr->h_source, if_incoming->net_dev->name, | |
1686 | if_incoming->net_dev->dev_addr, ogm_packet->orig, | |
1687 | ogm_packet->prev_sender, ntohl(ogm_packet->seqno), | |
1688 | ogm_packet->tq, ogm_packet->ttl, | |
1689 | ogm_packet->version, has_directlink_flag); | |
1690 | ||
1691 | rcu_read_lock(); | |
1692 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1693 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1694 | continue; | |
1695 | ||
1696 | if (hard_iface->soft_iface != if_incoming->soft_iface) | |
1697 | continue; | |
1698 | ||
1699 | if (batadv_compare_eth(ethhdr->h_source, | |
1700 | hard_iface->net_dev->dev_addr)) | |
1701 | is_my_addr = true; | |
1702 | ||
1703 | if (batadv_compare_eth(ogm_packet->orig, | |
1704 | hard_iface->net_dev->dev_addr)) | |
1705 | is_my_orig = true; | |
1706 | ||
1707 | if (batadv_compare_eth(ogm_packet->prev_sender, | |
1708 | hard_iface->net_dev->dev_addr)) | |
1709 | is_my_oldorig = true; | |
1710 | } | |
1711 | rcu_read_unlock(); | |
1712 | ||
1713 | if (is_my_addr) { | |
1714 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1715 | "Drop packet: received my own broadcast (sender: %pM)\n", | |
1716 | ethhdr->h_source); | |
1717 | return; | |
1718 | } | |
1719 | ||
1720 | if (is_my_orig) { | |
1721 | unsigned long *word; | |
1722 | int offset; | |
6b5e971a SE |
1723 | s32 bit_pos; |
1724 | s16 if_num; | |
1725 | u8 *weight; | |
7351a482 SW |
1726 | |
1727 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, | |
1728 | ethhdr->h_source); | |
1729 | if (!orig_neigh_node) | |
1730 | return; | |
1731 | ||
1732 | /* neighbor has to indicate direct link and it has to | |
1733 | * come via the corresponding interface | |
1734 | * save packet seqno for bidirectional check | |
1735 | */ | |
1736 | if (has_directlink_flag && | |
1737 | batadv_compare_eth(if_incoming->net_dev->dev_addr, | |
1738 | ogm_packet->orig)) { | |
1739 | if_num = if_incoming->if_num; | |
1740 | offset = if_num * BATADV_NUM_WORDS; | |
1741 | ||
1742 | spin_lock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
32db6aaa | 1743 | word = &orig_neigh_node->bat_iv.bcast_own[offset]; |
7351a482 SW |
1744 | bit_pos = if_incoming_seqno - 2; |
1745 | bit_pos -= ntohl(ogm_packet->seqno); | |
1746 | batadv_set_bit(word, bit_pos); | |
1747 | weight = &orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
1748 | *weight = bitmap_weight(word, | |
1749 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
1750 | spin_unlock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
1751 | } | |
1752 | ||
1753 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1754 | "Drop packet: originator packet from myself (via neighbor)\n"); | |
5d967310 | 1755 | batadv_orig_node_put(orig_neigh_node); |
7351a482 SW |
1756 | return; |
1757 | } | |
1758 | ||
1759 | if (is_my_oldorig) { | |
1760 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1761 | "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", | |
1762 | ethhdr->h_source); | |
1763 | return; | |
1764 | } | |
1765 | ||
1766 | if (ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { | |
1767 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1768 | "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", | |
1769 | ethhdr->h_source); | |
1770 | return; | |
1771 | } | |
1772 | ||
1773 | orig_node = batadv_iv_ogm_orig_get(bat_priv, ogm_packet->orig); | |
1774 | if (!orig_node) | |
1775 | return; | |
1776 | ||
1777 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, | |
1778 | if_incoming, BATADV_IF_DEFAULT); | |
1779 | ||
1780 | rcu_read_lock(); | |
1781 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1782 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1783 | continue; | |
1784 | ||
1785 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1786 | continue; | |
1787 | ||
27353446 SE |
1788 | if (!kref_get_unless_zero(&hard_iface->refcount)) |
1789 | continue; | |
1790 | ||
7351a482 SW |
1791 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, |
1792 | if_incoming, hard_iface); | |
27353446 SE |
1793 | |
1794 | batadv_hardif_put(hard_iface); | |
7351a482 SW |
1795 | } |
1796 | rcu_read_unlock(); | |
1797 | ||
5d967310 | 1798 | batadv_orig_node_put(orig_node); |
fc957275 ML |
1799 | } |
1800 | ||
f0d97253 AQ |
1801 | static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct *work) |
1802 | { | |
1803 | struct delayed_work *delayed_work; | |
1804 | struct batadv_forw_packet *forw_packet; | |
1805 | struct batadv_priv *bat_priv; | |
1806 | ||
1807 | delayed_work = to_delayed_work(work); | |
1808 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, | |
1809 | delayed_work); | |
1810 | bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface); | |
1811 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
1812 | hlist_del(&forw_packet->list); | |
1813 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
1814 | ||
1815 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) | |
1816 | goto out; | |
1817 | ||
1818 | batadv_iv_ogm_emit(forw_packet); | |
1819 | ||
1820 | /* we have to have at least one packet in the queue to determine the | |
1821 | * queues wake up time unless we are shutting down. | |
1822 | * | |
1823 | * only re-schedule if this is the "original" copy, e.g. the OGM of the | |
1824 | * primary interface should only be rescheduled once per period, but | |
1825 | * this function will be called for the forw_packet instances of the | |
1826 | * other secondary interfaces as well. | |
1827 | */ | |
1828 | if (forw_packet->own && | |
1829 | forw_packet->if_incoming == forw_packet->if_outgoing) | |
1830 | batadv_iv_ogm_schedule(forw_packet->if_incoming); | |
1831 | ||
1832 | out: | |
1833 | /* don't count own packet */ | |
1834 | if (!forw_packet->own) | |
1835 | atomic_inc(&bat_priv->batman_queue_left); | |
1836 | ||
1837 | batadv_forw_packet_free(forw_packet); | |
1838 | } | |
1839 | ||
fe8bc396 | 1840 | static int batadv_iv_ogm_receive(struct sk_buff *skb, |
56303d34 | 1841 | struct batadv_hard_iface *if_incoming) |
fc957275 | 1842 | { |
56303d34 | 1843 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
7351a482 | 1844 | struct batadv_ogm_packet *ogm_packet; |
6b5e971a | 1845 | u8 *packet_pos; |
7351a482 | 1846 | int ogm_offset; |
ef261577 | 1847 | bool ret; |
c3e29312 | 1848 | |
7e071c79 | 1849 | ret = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); |
c3e29312 ML |
1850 | if (!ret) |
1851 | return NET_RX_DROP; | |
fc957275 | 1852 | |
edbf12ba ML |
1853 | /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface |
1854 | * that does not have B.A.T.M.A.N. IV enabled ? | |
1855 | */ | |
29824a55 | 1856 | if (bat_priv->algo_ops->iface.enable != batadv_iv_ogm_iface_enable) |
edbf12ba ML |
1857 | return NET_RX_DROP; |
1858 | ||
d69909d2 SE |
1859 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX); |
1860 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, | |
f8214865 MH |
1861 | skb->len + ETH_HLEN); |
1862 | ||
7351a482 SW |
1863 | ogm_offset = 0; |
1864 | ogm_packet = (struct batadv_ogm_packet *)skb->data; | |
fc957275 ML |
1865 | |
1866 | /* unpack the aggregated packets and process them one by one */ | |
7351a482 SW |
1867 | while (batadv_iv_ogm_aggr_packet(ogm_offset, skb_headlen(skb), |
1868 | ogm_packet->tvlv_len)) { | |
1869 | batadv_iv_ogm_process(skb, ogm_offset, if_incoming); | |
fc957275 | 1870 | |
7351a482 SW |
1871 | ogm_offset += BATADV_OGM_HLEN; |
1872 | ogm_offset += ntohs(ogm_packet->tvlv_len); | |
fc957275 | 1873 | |
7351a482 SW |
1874 | packet_pos = skb->data + ogm_offset; |
1875 | ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b47506d9 | 1876 | } |
c3e29312 ML |
1877 | |
1878 | kfree_skb(skb); | |
1879 | return NET_RX_SUCCESS; | |
fc957275 | 1880 | } |
1c280471 | 1881 | |
1b371d13 SW |
1882 | /** |
1883 | * batadv_iv_ogm_orig_print_neigh - print neighbors for the originator table | |
89652331 SW |
1884 | * @orig_node: the orig_node for which the neighbors are printed |
1885 | * @if_outgoing: outgoing interface for these entries | |
1886 | * @seq: debugfs table seq_file struct | |
1887 | * | |
1888 | * Must be called while holding an rcu lock. | |
1889 | */ | |
1890 | static void | |
1891 | batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node, | |
1892 | struct batadv_hard_iface *if_outgoing, | |
1893 | struct seq_file *seq) | |
1894 | { | |
1895 | struct batadv_neigh_node *neigh_node; | |
1896 | struct batadv_neigh_ifinfo *n_ifinfo; | |
1897 | ||
1898 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { | |
1899 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); | |
1900 | if (!n_ifinfo) | |
1901 | continue; | |
1902 | ||
1903 | seq_printf(seq, " %pM (%3i)", | |
1904 | neigh_node->addr, | |
1905 | n_ifinfo->bat_iv.tq_avg); | |
1906 | ||
044fa3ae | 1907 | batadv_neigh_ifinfo_put(n_ifinfo); |
89652331 SW |
1908 | } |
1909 | } | |
1910 | ||
737a2a22 AQ |
1911 | /** |
1912 | * batadv_iv_ogm_orig_print - print the originator table | |
1913 | * @bat_priv: the bat priv with all the soft interface information | |
1914 | * @seq: debugfs table seq_file struct | |
cb1c92ec | 1915 | * @if_outgoing: the outgoing interface for which this should be printed |
737a2a22 AQ |
1916 | */ |
1917 | static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, | |
cb1c92ec SW |
1918 | struct seq_file *seq, |
1919 | struct batadv_hard_iface *if_outgoing) | |
737a2a22 | 1920 | { |
89652331 | 1921 | struct batadv_neigh_node *neigh_node; |
737a2a22 AQ |
1922 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
1923 | int last_seen_msecs, last_seen_secs; | |
1924 | struct batadv_orig_node *orig_node; | |
89652331 | 1925 | struct batadv_neigh_ifinfo *n_ifinfo; |
737a2a22 AQ |
1926 | unsigned long last_seen_jiffies; |
1927 | struct hlist_head *head; | |
1928 | int batman_count = 0; | |
6b5e971a | 1929 | u32 i; |
737a2a22 | 1930 | |
925a6f37 AQ |
1931 | seq_puts(seq, |
1932 | " Originator last-seen (#/255) Nexthop [outgoingIF]: Potential nexthops ...\n"); | |
737a2a22 AQ |
1933 | |
1934 | for (i = 0; i < hash->size; i++) { | |
1935 | head = &hash->table[i]; | |
1936 | ||
1937 | rcu_read_lock(); | |
1938 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
7351a482 | 1939 | neigh_node = batadv_orig_router_get(orig_node, |
cb1c92ec | 1940 | if_outgoing); |
737a2a22 AQ |
1941 | if (!neigh_node) |
1942 | continue; | |
1943 | ||
89652331 | 1944 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, |
cb1c92ec | 1945 | if_outgoing); |
89652331 SW |
1946 | if (!n_ifinfo) |
1947 | goto next; | |
1948 | ||
1949 | if (n_ifinfo->bat_iv.tq_avg == 0) | |
737a2a22 AQ |
1950 | goto next; |
1951 | ||
1952 | last_seen_jiffies = jiffies - orig_node->last_seen; | |
1953 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1954 | last_seen_secs = last_seen_msecs / 1000; | |
1955 | last_seen_msecs = last_seen_msecs % 1000; | |
1956 | ||
1957 | seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:", | |
1958 | orig_node->orig, last_seen_secs, | |
89652331 | 1959 | last_seen_msecs, n_ifinfo->bat_iv.tq_avg, |
737a2a22 AQ |
1960 | neigh_node->addr, |
1961 | neigh_node->if_incoming->net_dev->name); | |
1962 | ||
cb1c92ec SW |
1963 | batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing, |
1964 | seq); | |
737a2a22 AQ |
1965 | seq_puts(seq, "\n"); |
1966 | batman_count++; | |
1967 | ||
1968 | next: | |
25bb2509 | 1969 | batadv_neigh_node_put(neigh_node); |
89652331 | 1970 | if (n_ifinfo) |
044fa3ae | 1971 | batadv_neigh_ifinfo_put(n_ifinfo); |
737a2a22 AQ |
1972 | } |
1973 | rcu_read_unlock(); | |
1974 | } | |
1975 | ||
1976 | if (batman_count == 0) | |
1977 | seq_puts(seq, "No batman nodes in range ...\n"); | |
1978 | } | |
1979 | ||
7587405a ML |
1980 | /** |
1981 | * batadv_iv_hardif_neigh_print - print a single hop neighbour node | |
1982 | * @seq: neighbour table seq_file struct | |
1983 | * @hardif_neigh: hardif neighbour information | |
1984 | */ | |
1985 | static void | |
1986 | batadv_iv_hardif_neigh_print(struct seq_file *seq, | |
1987 | struct batadv_hardif_neigh_node *hardif_neigh) | |
1988 | { | |
1989 | int last_secs, last_msecs; | |
1990 | ||
1991 | last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000; | |
1992 | last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000; | |
1993 | ||
1994 | seq_printf(seq, " %10s %pM %4i.%03is\n", | |
1995 | hardif_neigh->if_incoming->net_dev->name, | |
1996 | hardif_neigh->addr, last_secs, last_msecs); | |
1997 | } | |
1998 | ||
1999 | /** | |
2000 | * batadv_iv_ogm_neigh_print - print the single hop neighbour list | |
2001 | * @bat_priv: the bat priv with all the soft interface information | |
2002 | * @seq: neighbour table seq_file struct | |
2003 | */ | |
2004 | static void batadv_iv_neigh_print(struct batadv_priv *bat_priv, | |
2005 | struct seq_file *seq) | |
2006 | { | |
2007 | struct net_device *net_dev = (struct net_device *)seq->private; | |
2008 | struct batadv_hardif_neigh_node *hardif_neigh; | |
2009 | struct batadv_hard_iface *hard_iface; | |
2010 | int batman_count = 0; | |
2011 | ||
925a6f37 | 2012 | seq_puts(seq, " IF Neighbor last-seen\n"); |
7587405a ML |
2013 | |
2014 | rcu_read_lock(); | |
2015 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
2016 | if (hard_iface->soft_iface != net_dev) | |
2017 | continue; | |
2018 | ||
2019 | hlist_for_each_entry_rcu(hardif_neigh, | |
2020 | &hard_iface->neigh_list, list) { | |
2021 | batadv_iv_hardif_neigh_print(seq, hardif_neigh); | |
2022 | batman_count++; | |
2023 | } | |
2024 | } | |
2025 | rcu_read_unlock(); | |
2026 | ||
2027 | if (batman_count == 0) | |
2028 | seq_puts(seq, "No batman nodes in range ...\n"); | |
2029 | } | |
2030 | ||
a3285a8f AQ |
2031 | /** |
2032 | * batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors | |
2033 | * @neigh1: the first neighbor object of the comparison | |
89652331 | 2034 | * @if_outgoing1: outgoing interface for the first neighbor |
a3285a8f | 2035 | * @neigh2: the second neighbor object of the comparison |
89652331 | 2036 | * @if_outgoing2: outgoing interface for the second neighbor |
a3285a8f | 2037 | * |
62fe710f | 2038 | * Return: a value less, equal to or greater than 0 if the metric via neigh1 is |
a3285a8f AQ |
2039 | * lower, the same as or higher than the metric via neigh2 |
2040 | */ | |
2041 | static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1, | |
89652331 SW |
2042 | struct batadv_hard_iface *if_outgoing1, |
2043 | struct batadv_neigh_node *neigh2, | |
2044 | struct batadv_hard_iface *if_outgoing2) | |
a3285a8f | 2045 | { |
89652331 | 2046 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
6b5e971a | 2047 | u8 tq1, tq2; |
89652331 SW |
2048 | int diff; |
2049 | ||
2050 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); | |
2051 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
a3285a8f | 2052 | |
89652331 SW |
2053 | if (!neigh1_ifinfo || !neigh2_ifinfo) { |
2054 | diff = 0; | |
2055 | goto out; | |
2056 | } | |
a3285a8f | 2057 | |
89652331 SW |
2058 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; |
2059 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
2060 | diff = tq1 - tq2; | |
2061 | ||
2062 | out: | |
2063 | if (neigh1_ifinfo) | |
044fa3ae | 2064 | batadv_neigh_ifinfo_put(neigh1_ifinfo); |
89652331 | 2065 | if (neigh2_ifinfo) |
044fa3ae | 2066 | batadv_neigh_ifinfo_put(neigh2_ifinfo); |
89652331 SW |
2067 | |
2068 | return diff; | |
a3285a8f AQ |
2069 | } |
2070 | ||
c43c981e | 2071 | /** |
18165f6f SW |
2072 | * batadv_iv_ogm_neigh_is_sob - check if neigh1 is similarly good or better |
2073 | * than neigh2 from the metric prospective | |
c43c981e | 2074 | * @neigh1: the first neighbor object of the comparison |
95298a91 | 2075 | * @if_outgoing1: outgoing interface for the first neighbor |
c43c981e | 2076 | * @neigh2: the second neighbor object of the comparison |
89652331 | 2077 | * @if_outgoing2: outgoing interface for the second neighbor |
95298a91 | 2078 | * |
62fe710f | 2079 | * Return: true if the metric via neigh1 is equally good or better than |
89652331 | 2080 | * the metric via neigh2, false otherwise. |
c43c981e | 2081 | */ |
89652331 | 2082 | static bool |
18165f6f | 2083 | batadv_iv_ogm_neigh_is_sob(struct batadv_neigh_node *neigh1, |
89652331 SW |
2084 | struct batadv_hard_iface *if_outgoing1, |
2085 | struct batadv_neigh_node *neigh2, | |
2086 | struct batadv_hard_iface *if_outgoing2) | |
c43c981e | 2087 | { |
89652331 | 2088 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
6b5e971a | 2089 | u8 tq1, tq2; |
89652331 | 2090 | bool ret; |
c43c981e | 2091 | |
89652331 SW |
2092 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); |
2093 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
2094 | ||
2095 | /* we can't say that the metric is better */ | |
2096 | if (!neigh1_ifinfo || !neigh2_ifinfo) { | |
2097 | ret = false; | |
2098 | goto out; | |
2099 | } | |
2100 | ||
2101 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; | |
2102 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
2103 | ret = (tq1 - tq2) > -BATADV_TQ_SIMILARITY_THRESHOLD; | |
2104 | ||
2105 | out: | |
2106 | if (neigh1_ifinfo) | |
044fa3ae | 2107 | batadv_neigh_ifinfo_put(neigh1_ifinfo); |
89652331 | 2108 | if (neigh2_ifinfo) |
044fa3ae | 2109 | batadv_neigh_ifinfo_put(neigh2_ifinfo); |
89652331 SW |
2110 | |
2111 | return ret; | |
c43c981e AQ |
2112 | } |
2113 | ||
f0d97253 AQ |
2114 | static void batadv_iv_iface_activate(struct batadv_hard_iface *hard_iface) |
2115 | { | |
2116 | /* begin scheduling originator messages on that interface */ | |
2117 | batadv_iv_ogm_schedule(hard_iface); | |
2118 | } | |
2119 | ||
56303d34 | 2120 | static struct batadv_algo_ops batadv_batman_iv __read_mostly = { |
519d3497 | 2121 | .name = "BATMAN_IV", |
29824a55 AQ |
2122 | .iface = { |
2123 | .activate = batadv_iv_iface_activate, | |
2124 | .enable = batadv_iv_ogm_iface_enable, | |
2125 | .disable = batadv_iv_ogm_iface_disable, | |
2126 | .update_mac = batadv_iv_ogm_iface_update_mac, | |
2127 | .primary_set = batadv_iv_ogm_primary_iface_set, | |
2128 | }, | |
2129 | .neigh = { | |
2130 | .cmp = batadv_iv_ogm_neigh_cmp, | |
2131 | .is_similar_or_better = batadv_iv_ogm_neigh_is_sob, | |
2132 | .print = batadv_iv_neigh_print, | |
2133 | }, | |
2134 | .orig = { | |
2135 | .print = batadv_iv_ogm_orig_print, | |
2136 | .free = batadv_iv_ogm_orig_free, | |
2137 | .add_if = batadv_iv_ogm_orig_add_if, | |
2138 | .del_if = batadv_iv_ogm_orig_del_if, | |
2139 | }, | |
1c280471 ML |
2140 | }; |
2141 | ||
81c524f7 | 2142 | int __init batadv_iv_init(void) |
1c280471 | 2143 | { |
c3e29312 ML |
2144 | int ret; |
2145 | ||
2146 | /* batman originator packet */ | |
acd34afa SE |
2147 | ret = batadv_recv_handler_register(BATADV_IV_OGM, |
2148 | batadv_iv_ogm_receive); | |
c3e29312 ML |
2149 | if (ret < 0) |
2150 | goto out; | |
2151 | ||
fe8bc396 | 2152 | ret = batadv_algo_register(&batadv_batman_iv); |
c3e29312 ML |
2153 | if (ret < 0) |
2154 | goto handler_unregister; | |
2155 | ||
2156 | goto out; | |
2157 | ||
2158 | handler_unregister: | |
acd34afa | 2159 | batadv_recv_handler_unregister(BATADV_IV_OGM); |
c3e29312 ML |
2160 | out: |
2161 | return ret; | |
1c280471 | 2162 | } |