1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2007-2018 B.A.T.M.A.N. contributors:
3 *
4 * Marek Lindner, Simon Wunderlich
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of version 2 of the GNU General Public
8 * License as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
17 */
18
19 #include "main.h"
20
21 #include <linux/byteorder/generic.h>
22 #include <linux/etherdevice.h>
23 #include <linux/gfp.h>
24 #include <linux/if_ether.h>
25 #include <linux/kernel.h>
26 #include <linux/kref.h>
27 #include <linux/list.h>
28 #include <linux/lockdep.h>
29 #include <linux/netdevice.h>
30 #include <linux/pkt_sched.h>
31 #include <linux/rculist.h>
32 #include <linux/rcupdate.h>
33 #include <linux/skbuff.h>
34 #include <linux/slab.h>
35 #include <linux/spinlock.h>
36 #include <linux/stddef.h>
37 #include <linux/string.h>
38 #include <linux/types.h>
39 #include <uapi/linux/batadv_packet.h>
40
41 #include "originator.h"
42 #include "send.h"
43 #include "tvlv.h"
44
45 /**
46 * batadv_tvlv_handler_release() - release tvlv handler from lists and queue for
47 * free after rcu grace period
48 * @ref: kref pointer of the tvlv
49 */
50 static void batadv_tvlv_handler_release(struct kref *ref)
51 {
52 struct batadv_tvlv_handler *tvlv_handler;
53
54 tvlv_handler = container_of(ref, struct batadv_tvlv_handler, refcount);
55 kfree_rcu(tvlv_handler, rcu);
56 }
57
58 /**
59 * batadv_tvlv_handler_put() - decrement the tvlv container refcounter and
60 * possibly release it
61 * @tvlv_handler: the tvlv handler to free
62 */
63 static void batadv_tvlv_handler_put(struct batadv_tvlv_handler *tvlv_handler)
64 {
65 kref_put(&tvlv_handler->refcount, batadv_tvlv_handler_release);
66 }
67
68 /**
69 * batadv_tvlv_handler_get() - retrieve tvlv handler from the tvlv handler list
70 * based on the provided type and version (both need to match)
71 * @bat_priv: the bat priv with all the soft interface information
72 * @type: tvlv handler type to look for
73 * @version: tvlv handler version to look for
74 *
75 * Return: tvlv handler if found or NULL otherwise.
76 */
77 static struct batadv_tvlv_handler *
78 batadv_tvlv_handler_get(struct batadv_priv *bat_priv, u8 type, u8 version)
79 {
80 struct batadv_tvlv_handler *tvlv_handler_tmp, *tvlv_handler = NULL;
81
82 rcu_read_lock();
83 hlist_for_each_entry_rcu(tvlv_handler_tmp,
84 &bat_priv->tvlv.handler_list, list) {
85 if (tvlv_handler_tmp->type != type)
86 continue;
87
88 if (tvlv_handler_tmp->version != version)
89 continue;
90
91 if (!kref_get_unless_zero(&tvlv_handler_tmp->refcount))
92 continue;
93
94 tvlv_handler = tvlv_handler_tmp;
95 break;
96 }
97 rcu_read_unlock();
98
99 return tvlv_handler;
100 }
101
102 /**
103 * batadv_tvlv_container_release() - release tvlv from lists and free
104 * @ref: kref pointer of the tvlv
105 */
106 static void batadv_tvlv_container_release(struct kref *ref)
107 {
108 struct batadv_tvlv_container *tvlv;
109
110 tvlv = container_of(ref, struct batadv_tvlv_container, refcount);
111 kfree(tvlv);
112 }
113
114 /**
115 * batadv_tvlv_container_put() - decrement the tvlv container refcounter and
116 * possibly release it
117 * @tvlv: the tvlv container to free
118 */
119 static void batadv_tvlv_container_put(struct batadv_tvlv_container *tvlv)
120 {
121 kref_put(&tvlv->refcount, batadv_tvlv_container_release);
122 }
123
124 /**
125 * batadv_tvlv_container_get() - retrieve tvlv container from the tvlv container
126 * list based on the provided type and version (both need to match)
127 * @bat_priv: the bat priv with all the soft interface information
128 * @type: tvlv container type to look for
129 * @version: tvlv container version to look for
130 *
131 * Has to be called with the appropriate locks being acquired
132 * (tvlv.container_list_lock).
133 *
134 * Return: tvlv container if found or NULL otherwise.
135 */
136 static struct batadv_tvlv_container *
137 batadv_tvlv_container_get(struct batadv_priv *bat_priv, u8 type, u8 version)
138 {
139 struct batadv_tvlv_container *tvlv_tmp, *tvlv = NULL;
140
141 lockdep_assert_held(&bat_priv->tvlv.container_list_lock);
142
143 hlist_for_each_entry(tvlv_tmp, &bat_priv->tvlv.container_list, list) {
144 if (tvlv_tmp->tvlv_hdr.type != type)
145 continue;
146
147 if (tvlv_tmp->tvlv_hdr.version != version)
148 continue;
149
150 kref_get(&tvlv_tmp->refcount);
151 tvlv = tvlv_tmp;
152 break;
153 }
154
155 return tvlv;
156 }
157
158 /**
159 * batadv_tvlv_container_list_size() - calculate the size of the tvlv container
160 * list entries
161 * @bat_priv: the bat priv with all the soft interface information
162 *
163 * Has to be called with the appropriate locks being acquired
164 * (tvlv.container_list_lock).
165 *
166 * Return: size of all currently registered tvlv containers in bytes.
167 */
168 static u16 batadv_tvlv_container_list_size(struct batadv_priv *bat_priv)
169 {
170 struct batadv_tvlv_container *tvlv;
171 u16 tvlv_len = 0;
172
173 lockdep_assert_held(&bat_priv->tvlv.container_list_lock);
174
175 hlist_for_each_entry(tvlv, &bat_priv->tvlv.container_list, list) {
176 tvlv_len += sizeof(struct batadv_tvlv_hdr);
177 tvlv_len += ntohs(tvlv->tvlv_hdr.len);
178 }
179
180 return tvlv_len;
181 }
182
183 /**
184 * batadv_tvlv_container_remove() - remove tvlv container from the tvlv
185 * container list
186 * @bat_priv: the bat priv with all the soft interface information
187 * @tvlv: the to be removed tvlv container
188 *
189 * Has to be called with the appropriate locks being acquired
190 * (tvlv.container_list_lock).
191 */
192 static void batadv_tvlv_container_remove(struct batadv_priv *bat_priv,
193 struct batadv_tvlv_container *tvlv)
194 {
195 lockdep_assert_held(&bat_priv->tvlv.container_list_lock);
196
197 if (!tvlv)
198 return;
199
200 hlist_del(&tvlv->list);
201
202 /* first call to decrement the counter, second call to free */
203 batadv_tvlv_container_put(tvlv);
204 batadv_tvlv_container_put(tvlv);
205 }
206
207 /**
208 * batadv_tvlv_container_unregister() - unregister tvlv container based on the
209 * provided type and version (both need to match)
210 * @bat_priv: the bat priv with all the soft interface information
211 * @type: tvlv container type to unregister
212 * @version: tvlv container type to unregister
213 */
214 void batadv_tvlv_container_unregister(struct batadv_priv *bat_priv,
215 u8 type, u8 version)
216 {
217 struct batadv_tvlv_container *tvlv;
218
219 spin_lock_bh(&bat_priv->tvlv.container_list_lock);
220 tvlv = batadv_tvlv_container_get(bat_priv, type, version);
221 batadv_tvlv_container_remove(bat_priv, tvlv);
222 spin_unlock_bh(&bat_priv->tvlv.container_list_lock);
223 }
224
225 /**
226 * batadv_tvlv_container_register() - register tvlv type, version and content
227 * to be propagated with each (primary interface) OGM
228 * @bat_priv: the bat priv with all the soft interface information
229 * @type: tvlv container type
230 * @version: tvlv container version
231 * @tvlv_value: tvlv container content
232 * @tvlv_value_len: tvlv container content length
233 *
234 * If a container of the same type and version was already registered the new
235 * content is going to replace the old one.
236 */
237 void batadv_tvlv_container_register(struct batadv_priv *bat_priv,
238 u8 type, u8 version,
239 void *tvlv_value, u16 tvlv_value_len)
240 {
241 struct batadv_tvlv_container *tvlv_old, *tvlv_new;
242
243 if (!tvlv_value)
244 tvlv_value_len = 0;
245
246 tvlv_new = kzalloc(sizeof(*tvlv_new) + tvlv_value_len, GFP_ATOMIC);
247 if (!tvlv_new)
248 return;
249
250 tvlv_new->tvlv_hdr.version = version;
251 tvlv_new->tvlv_hdr.type = type;
252 tvlv_new->tvlv_hdr.len = htons(tvlv_value_len);
253
254 memcpy(tvlv_new + 1, tvlv_value, ntohs(tvlv_new->tvlv_hdr.len));
255 INIT_HLIST_NODE(&tvlv_new->list);
256 kref_init(&tvlv_new->refcount);
257
258 spin_lock_bh(&bat_priv->tvlv.container_list_lock);
259 tvlv_old = batadv_tvlv_container_get(bat_priv, type, version);
260 batadv_tvlv_container_remove(bat_priv, tvlv_old);
261
262 kref_get(&tvlv_new->refcount);
263 hlist_add_head(&tvlv_new->list, &bat_priv->tvlv.container_list);
264 spin_unlock_bh(&bat_priv->tvlv.container_list_lock);
265
266 /* don't return reference to new tvlv_container */
267 batadv_tvlv_container_put(tvlv_new);
268 }
269
270 /**
271 * batadv_tvlv_realloc_packet_buff() - reallocate packet buffer to accommodate
272 * requested packet size
273 * @packet_buff: packet buffer
274 * @packet_buff_len: packet buffer size
275 * @min_packet_len: requested packet minimum size
276 * @additional_packet_len: requested additional packet size on top of minimum
277 * size
278 *
279 * Return: true of the packet buffer could be changed to the requested size,
280 * false otherwise.
281 */
282 static bool batadv_tvlv_realloc_packet_buff(unsigned char **packet_buff,
283 int *packet_buff_len,
284 int min_packet_len,
285 int additional_packet_len)
286 {
287 unsigned char *new_buff;
288
289 new_buff = kmalloc(min_packet_len + additional_packet_len, GFP_ATOMIC);
290
291 /* keep old buffer if kmalloc should fail */
292 if (!new_buff)
293 return false;
294
295 memcpy(new_buff, *packet_buff, min_packet_len);
296 kfree(*packet_buff);
297 *packet_buff = new_buff;
298 *packet_buff_len = min_packet_len + additional_packet_len;
299
300 return true;
301 }
302
303 /**
304 * batadv_tvlv_container_ogm_append() - append tvlv container content to given
305 * OGM packet buffer
306 * @bat_priv: the bat priv with all the soft interface information
307 * @packet_buff: ogm packet buffer
308 * @packet_buff_len: ogm packet buffer size including ogm header and tvlv
309 * content
310 * @packet_min_len: ogm header size to be preserved for the OGM itself
311 *
312 * The ogm packet might be enlarged or shrunk depending on the current size
313 * and the size of the to-be-appended tvlv containers.
314 *
315 * Return: size of all appended tvlv containers in bytes.
316 */
317 u16 batadv_tvlv_container_ogm_append(struct batadv_priv *bat_priv,
318 unsigned char **packet_buff,
319 int *packet_buff_len, int packet_min_len)
320 {
321 struct batadv_tvlv_container *tvlv;
322 struct batadv_tvlv_hdr *tvlv_hdr;
323 u16 tvlv_value_len;
324 void *tvlv_value;
325 bool ret;
326
327 spin_lock_bh(&bat_priv->tvlv.container_list_lock);
328 tvlv_value_len = batadv_tvlv_container_list_size(bat_priv);
329
330 ret = batadv_tvlv_realloc_packet_buff(packet_buff, packet_buff_len,
331 packet_min_len, tvlv_value_len);
332
333 if (!ret)
334 goto end;
335
336 if (!tvlv_value_len)
337 goto end;
338
339 tvlv_value = (*packet_buff) + packet_min_len;
340
341 hlist_for_each_entry(tvlv, &bat_priv->tvlv.container_list, list) {
342 tvlv_hdr = tvlv_value;
343 tvlv_hdr->type = tvlv->tvlv_hdr.type;
344 tvlv_hdr->version = tvlv->tvlv_hdr.version;
345 tvlv_hdr->len = tvlv->tvlv_hdr.len;
346 tvlv_value = tvlv_hdr + 1;
347 memcpy(tvlv_value, tvlv + 1, ntohs(tvlv->tvlv_hdr.len));
348 tvlv_value = (u8 *)tvlv_value + ntohs(tvlv->tvlv_hdr.len);
349 }
350
351 end:
352 spin_unlock_bh(&bat_priv->tvlv.container_list_lock);
353 return tvlv_value_len;
354 }
355
356 /**
357 * batadv_tvlv_call_handler() - parse the given tvlv buffer to call the
358 * appropriate handlers
359 * @bat_priv: the bat priv with all the soft interface information
360 * @tvlv_handler: tvlv callback function handling the tvlv content
361 * @ogm_source: flag indicating whether the tvlv is an ogm or a unicast packet
362 * @orig_node: orig node emitting the ogm packet
363 * @src: source mac address of the unicast packet
364 * @dst: destination mac address of the unicast packet
365 * @tvlv_value: tvlv content
366 * @tvlv_value_len: tvlv content length
367 *
368 * Return: success if handler was not found or the return value of the handler
369 * callback.
370 */
371 static int batadv_tvlv_call_handler(struct batadv_priv *bat_priv,
372 struct batadv_tvlv_handler *tvlv_handler,
373 bool ogm_source,
374 struct batadv_orig_node *orig_node,
375 u8 *src, u8 *dst,
376 void *tvlv_value, u16 tvlv_value_len)
377 {
378 if (!tvlv_handler)
379 return NET_RX_SUCCESS;
380
381 if (ogm_source) {
382 if (!tvlv_handler->ogm_handler)
383 return NET_RX_SUCCESS;
384
385 if (!orig_node)
386 return NET_RX_SUCCESS;
387
388 tvlv_handler->ogm_handler(bat_priv, orig_node,
389 BATADV_NO_FLAGS,
390 tvlv_value, tvlv_value_len);
391 tvlv_handler->flags |= BATADV_TVLV_HANDLER_OGM_CALLED;
392 } else {
393 if (!src)
394 return NET_RX_SUCCESS;
395
396 if (!dst)
397 return NET_RX_SUCCESS;
398
399 if (!tvlv_handler->unicast_handler)
400 return NET_RX_SUCCESS;
401
402 return tvlv_handler->unicast_handler(bat_priv, src,
403 dst, tvlv_value,
404 tvlv_value_len);
405 }
406
407 return NET_RX_SUCCESS;
408 }
409
410 /**
411 * batadv_tvlv_containers_process() - parse the given tvlv buffer to call the
412 * appropriate handlers
413 * @bat_priv: the bat priv with all the soft interface information
414 * @ogm_source: flag indicating whether the tvlv is an ogm or a unicast packet
415 * @orig_node: orig node emitting the ogm packet
416 * @src: source mac address of the unicast packet
417 * @dst: destination mac address of the unicast packet
418 * @tvlv_value: tvlv content
419 * @tvlv_value_len: tvlv content length
420 *
421 * Return: success when processing an OGM or the return value of all called
422 * handler callbacks.
423 */
424 int batadv_tvlv_containers_process(struct batadv_priv *bat_priv,
425 bool ogm_source,
426 struct batadv_orig_node *orig_node,
427 u8 *src, u8 *dst,
428 void *tvlv_value, u16 tvlv_value_len)
429 {
430 struct batadv_tvlv_handler *tvlv_handler;
431 struct batadv_tvlv_hdr *tvlv_hdr;
432 u16 tvlv_value_cont_len;
433 u8 cifnotfound = BATADV_TVLV_HANDLER_OGM_CIFNOTFND;
434 int ret = NET_RX_SUCCESS;
435
436 while (tvlv_value_len >= sizeof(*tvlv_hdr)) {
437 tvlv_hdr = tvlv_value;
438 tvlv_value_cont_len = ntohs(tvlv_hdr->len);
439 tvlv_value = tvlv_hdr + 1;
440 tvlv_value_len -= sizeof(*tvlv_hdr);
441
442 if (tvlv_value_cont_len > tvlv_value_len)
443 break;
444
445 tvlv_handler = batadv_tvlv_handler_get(bat_priv,
446 tvlv_hdr->type,
447 tvlv_hdr->version);
448
449 ret |= batadv_tvlv_call_handler(bat_priv, tvlv_handler,
450 ogm_source, orig_node,
451 src, dst, tvlv_value,
452 tvlv_value_cont_len);
453 if (tvlv_handler)
454 batadv_tvlv_handler_put(tvlv_handler);
455 tvlv_value = (u8 *)tvlv_value + tvlv_value_cont_len;
456 tvlv_value_len -= tvlv_value_cont_len;
457 }
458
459 if (!ogm_source)
460 return ret;
461
462 rcu_read_lock();
463 hlist_for_each_entry_rcu(tvlv_handler,
464 &bat_priv->tvlv.handler_list, list) {
465 if ((tvlv_handler->flags & BATADV_TVLV_HANDLER_OGM_CIFNOTFND) &&
466 !(tvlv_handler->flags & BATADV_TVLV_HANDLER_OGM_CALLED))
467 tvlv_handler->ogm_handler(bat_priv, orig_node,
468 cifnotfound, NULL, 0);
469
470 tvlv_handler->flags &= ~BATADV_TVLV_HANDLER_OGM_CALLED;
471 }
472 rcu_read_unlock();
473
474 return NET_RX_SUCCESS;
475 }
476
477 /**
478 * batadv_tvlv_ogm_receive() - process an incoming ogm and call the appropriate
479 * handlers
480 * @bat_priv: the bat priv with all the soft interface information
481 * @batadv_ogm_packet: ogm packet containing the tvlv containers
482 * @orig_node: orig node emitting the ogm packet
483 */
484 void batadv_tvlv_ogm_receive(struct batadv_priv *bat_priv,
485 struct batadv_ogm_packet *batadv_ogm_packet,
486 struct batadv_orig_node *orig_node)
487 {
488 void *tvlv_value;
489 u16 tvlv_value_len;
490
491 if (!batadv_ogm_packet)
492 return;
493
494 tvlv_value_len = ntohs(batadv_ogm_packet->tvlv_len);
495 if (!tvlv_value_len)
496 return;
497
498 tvlv_value = batadv_ogm_packet + 1;
499
500 batadv_tvlv_containers_process(bat_priv, true, orig_node, NULL, NULL,
501 tvlv_value, tvlv_value_len);
502 }
503
504 /**
505 * batadv_tvlv_handler_register() - register tvlv handler based on the provided
506 * type and version (both need to match) for ogm tvlv payload and/or unicast
507 * payload
508 * @bat_priv: the bat priv with all the soft interface information
509 * @optr: ogm tvlv handler callback function. This function receives the orig
510 * node, flags and the tvlv content as argument to process.
511 * @uptr: unicast tvlv handler callback function. This function receives the
512 * source & destination of the unicast packet as well as the tvlv content
513 * to process.
514 * @type: tvlv handler type to be registered
515 * @version: tvlv handler version to be registered
516 * @flags: flags to enable or disable TVLV API behavior
517 */
518 void batadv_tvlv_handler_register(struct batadv_priv *bat_priv,
519 void (*optr)(struct batadv_priv *bat_priv,
520 struct batadv_orig_node *orig,
521 u8 flags,
522 void *tvlv_value,
523 u16 tvlv_value_len),
524 int (*uptr)(struct batadv_priv *bat_priv,
525 u8 *src, u8 *dst,
526 void *tvlv_value,
527 u16 tvlv_value_len),
528 u8 type, u8 version, u8 flags)
529 {
530 struct batadv_tvlv_handler *tvlv_handler;
531
532 spin_lock_bh(&bat_priv->tvlv.handler_list_lock);
533
534 tvlv_handler = batadv_tvlv_handler_get(bat_priv, type, version);
535 if (tvlv_handler) {
536 spin_unlock_bh(&bat_priv->tvlv.handler_list_lock);
537 batadv_tvlv_handler_put(tvlv_handler);
538 return;
539 }
540
541 tvlv_handler = kzalloc(sizeof(*tvlv_handler), GFP_ATOMIC);
542 if (!tvlv_handler) {
543 spin_unlock_bh(&bat_priv->tvlv.handler_list_lock);
544 return;
545 }
546
547 tvlv_handler->ogm_handler = optr;
548 tvlv_handler->unicast_handler = uptr;
549 tvlv_handler->type = type;
550 tvlv_handler->version = version;
551 tvlv_handler->flags = flags;
552 kref_init(&tvlv_handler->refcount);
553 INIT_HLIST_NODE(&tvlv_handler->list);
554
555 kref_get(&tvlv_handler->refcount);
556 hlist_add_head_rcu(&tvlv_handler->list, &bat_priv->tvlv.handler_list);
557 spin_unlock_bh(&bat_priv->tvlv.handler_list_lock);
558
559 /* don't return reference to new tvlv_handler */
560 batadv_tvlv_handler_put(tvlv_handler);
561 }
562
563 /**
564 * batadv_tvlv_handler_unregister() - unregister tvlv handler based on the
565 * provided type and version (both need to match)
566 * @bat_priv: the bat priv with all the soft interface information
567 * @type: tvlv handler type to be unregistered
568 * @version: tvlv handler version to be unregistered
569 */
570 void batadv_tvlv_handler_unregister(struct batadv_priv *bat_priv,
571 u8 type, u8 version)
572 {
573 struct batadv_tvlv_handler *tvlv_handler;
574
575 tvlv_handler = batadv_tvlv_handler_get(bat_priv, type, version);
576 if (!tvlv_handler)
577 return;
578
579 batadv_tvlv_handler_put(tvlv_handler);
580 spin_lock_bh(&bat_priv->tvlv.handler_list_lock);
581 hlist_del_rcu(&tvlv_handler->list);
582 spin_unlock_bh(&bat_priv->tvlv.handler_list_lock);
583 batadv_tvlv_handler_put(tvlv_handler);
584 }
585
586 /**
587 * batadv_tvlv_unicast_send() - send a unicast packet with tvlv payload to the
588 * specified host
589 * @bat_priv: the bat priv with all the soft interface information
590 * @src: source mac address of the unicast packet
591 * @dst: destination mac address of the unicast packet
592 * @type: tvlv type
593 * @version: tvlv version
594 * @tvlv_value: tvlv content
595 * @tvlv_value_len: tvlv content length
596 */
597 void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, u8 *src,
598 u8 *dst, u8 type, u8 version,
599 void *tvlv_value, u16 tvlv_value_len)
600 {
601 struct batadv_unicast_tvlv_packet *unicast_tvlv_packet;
602 struct batadv_tvlv_hdr *tvlv_hdr;
603 struct batadv_orig_node *orig_node;
604 struct sk_buff *skb;
605 unsigned char *tvlv_buff;
606 unsigned int tvlv_len;
607 ssize_t hdr_len = sizeof(*unicast_tvlv_packet);
608
609 orig_node = batadv_orig_hash_find(bat_priv, dst);
610 if (!orig_node)
611 return;
612
613 tvlv_len = sizeof(*tvlv_hdr) + tvlv_value_len;
614
615 skb = netdev_alloc_skb_ip_align(NULL, ETH_HLEN + hdr_len + tvlv_len);
616 if (!skb)
617 goto out;
618
619 skb->priority = TC_PRIO_CONTROL;
620 skb_reserve(skb, ETH_HLEN);
621 tvlv_buff = skb_put(skb, sizeof(*unicast_tvlv_packet) + tvlv_len);
622 unicast_tvlv_packet = (struct batadv_unicast_tvlv_packet *)tvlv_buff;
623 unicast_tvlv_packet->packet_type = BATADV_UNICAST_TVLV;
624 unicast_tvlv_packet->version = BATADV_COMPAT_VERSION;
625 unicast_tvlv_packet->ttl = BATADV_TTL;
626 unicast_tvlv_packet->reserved = 0;
627 unicast_tvlv_packet->tvlv_len = htons(tvlv_len);
628 unicast_tvlv_packet->align = 0;
629 ether_addr_copy(unicast_tvlv_packet->src, src);
630 ether_addr_copy(unicast_tvlv_packet->dst, dst);
631
632 tvlv_buff = (unsigned char *)(unicast_tvlv_packet + 1);
633 tvlv_hdr = (struct batadv_tvlv_hdr *)tvlv_buff;
634 tvlv_hdr->version = version;
635 tvlv_hdr->type = type;
636 tvlv_hdr->len = htons(tvlv_value_len);
637 tvlv_buff += sizeof(*tvlv_hdr);
638 memcpy(tvlv_buff, tvlv_value, tvlv_value_len);
639
640 batadv_send_skb_to_orig(skb, orig_node, NULL);
641 out:
642 batadv_orig_node_put(orig_node);
643 }
644
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