blob: 2fd542e0d6a8319e18b1867204a5084e366cbd34 [file] [log] [blame]
Markus Pargmann1f8dce42016-05-15 11:07:43 +02001/* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors:
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
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
16 */
17
18#include "main.h"
19
20#include <linux/byteorder/generic.h>
21#include <linux/etherdevice.h>
22#include <linux/fs.h>
23#include <linux/if_ether.h>
24#include <linux/kernel.h>
25#include <linux/kref.h>
26#include <linux/list.h>
27#include <linux/lockdep.h>
28#include <linux/netdevice.h>
29#include <linux/pkt_sched.h>
30#include <linux/rculist.h>
31#include <linux/rcupdate.h>
32#include <linux/skbuff.h>
33#include <linux/slab.h>
34#include <linux/spinlock.h>
35#include <linux/stddef.h>
36#include <linux/string.h>
37#include <linux/types.h>
38
39#include "originator.h"
40#include "packet.h"
41#include "send.h"
42#include "tvlv.h"
43
44/**
45 * batadv_tvlv_handler_release - release tvlv handler from lists and queue for
46 * free after rcu grace period
47 * @ref: kref pointer of the tvlv
48 */
49static void batadv_tvlv_handler_release(struct kref *ref)
50{
51 struct batadv_tvlv_handler *tvlv_handler;
52
53 tvlv_handler = container_of(ref, struct batadv_tvlv_handler, refcount);
54 kfree_rcu(tvlv_handler, rcu);
55}
56
57/**
58 * batadv_tvlv_handler_put - decrement the tvlv container refcounter and
59 * possibly release it
60 * @tvlv_handler: the tvlv handler to free
61 */
62static void batadv_tvlv_handler_put(struct batadv_tvlv_handler *tvlv_handler)
63{
64 kref_put(&tvlv_handler->refcount, batadv_tvlv_handler_release);
65}
66
67/**
68 * batadv_tvlv_handler_get - retrieve tvlv handler from the tvlv handler list
69 * based on the provided type and version (both need to match)
70 * @bat_priv: the bat priv with all the soft interface information
71 * @type: tvlv handler type to look for
72 * @version: tvlv handler version to look for
73 *
74 * Return: tvlv handler if found or NULL otherwise.
75 */
76static struct batadv_tvlv_handler *
77batadv_tvlv_handler_get(struct batadv_priv *bat_priv, u8 type, u8 version)
78{
79 struct batadv_tvlv_handler *tvlv_handler_tmp, *tvlv_handler = NULL;
80
81 rcu_read_lock();
82 hlist_for_each_entry_rcu(tvlv_handler_tmp,
83 &bat_priv->tvlv.handler_list, list) {
84 if (tvlv_handler_tmp->type != type)
85 continue;
86
87 if (tvlv_handler_tmp->version != version)
88 continue;
89
90 if (!kref_get_unless_zero(&tvlv_handler_tmp->refcount))
91 continue;
92
93 tvlv_handler = tvlv_handler_tmp;
94 break;
95 }
96 rcu_read_unlock();
97
98 return tvlv_handler;
99}
100
101/**
102 * batadv_tvlv_container_release - release tvlv from lists and free
103 * @ref: kref pointer of the tvlv
104 */
105static void batadv_tvlv_container_release(struct kref *ref)
106{
107 struct batadv_tvlv_container *tvlv;
108
109 tvlv = container_of(ref, struct batadv_tvlv_container, refcount);
110 kfree(tvlv);
111}
112
113/**
114 * batadv_tvlv_container_put - decrement the tvlv container refcounter and
115 * possibly release it
116 * @tvlv: the tvlv container to free
117 */
118static void batadv_tvlv_container_put(struct batadv_tvlv_container *tvlv)
119{
120 kref_put(&tvlv->refcount, batadv_tvlv_container_release);
121}
122
123/**
124 * batadv_tvlv_container_get - retrieve tvlv container from the tvlv container
125 * list based on the provided type and version (both need to match)
126 * @bat_priv: the bat priv with all the soft interface information
127 * @type: tvlv container type to look for
128 * @version: tvlv container version to look for
129 *
130 * Has to be called with the appropriate locks being acquired
131 * (tvlv.container_list_lock).
132 *
133 * Return: tvlv container if found or NULL otherwise.
134 */
135static struct batadv_tvlv_container *
136batadv_tvlv_container_get(struct batadv_priv *bat_priv, u8 type, u8 version)
137{
138 struct batadv_tvlv_container *tvlv_tmp, *tvlv = NULL;
139
140 lockdep_assert_held(&bat_priv->tvlv.container_list_lock);
141
142 hlist_for_each_entry(tvlv_tmp, &bat_priv->tvlv.container_list, list) {
143 if (tvlv_tmp->tvlv_hdr.type != type)
144 continue;
145
146 if (tvlv_tmp->tvlv_hdr.version != version)
147 continue;
148
149 kref_get(&tvlv_tmp->refcount);
150 tvlv = tvlv_tmp;
151 break;
152 }
153
154 return tvlv;
155}
156
157/**
158 * batadv_tvlv_container_list_size - calculate the size of the tvlv container
159 * list entries
160 * @bat_priv: the bat priv with all the soft interface information
161 *
162 * Has to be called with the appropriate locks being acquired
163 * (tvlv.container_list_lock).
164 *
165 * Return: size of all currently registered tvlv containers in bytes.
166 */
167static u16 batadv_tvlv_container_list_size(struct batadv_priv *bat_priv)
168{
169 struct batadv_tvlv_container *tvlv;
170 u16 tvlv_len = 0;
171
172 lockdep_assert_held(&bat_priv->tvlv.container_list_lock);
173
174 hlist_for_each_entry(tvlv, &bat_priv->tvlv.container_list, list) {
175 tvlv_len += sizeof(struct batadv_tvlv_hdr);
176 tvlv_len += ntohs(tvlv->tvlv_hdr.len);
177 }
178
179 return tvlv_len;
180}
181
182/**
183 * batadv_tvlv_container_remove - remove tvlv container from the tvlv container
184 * list
185 * @bat_priv: the bat priv with all the soft interface information
186 * @tvlv: the to be removed tvlv container
187 *
188 * Has to be called with the appropriate locks being acquired
189 * (tvlv.container_list_lock).
190 */
191static void batadv_tvlv_container_remove(struct batadv_priv *bat_priv,
192 struct batadv_tvlv_container *tvlv)
193{
194 lockdep_assert_held(&bat_priv->tvlv.container_list_lock);
195
196 if (!tvlv)
197 return;
198
199 hlist_del(&tvlv->list);
200
201 /* first call to decrement the counter, second call to free */
202 batadv_tvlv_container_put(tvlv);
203 batadv_tvlv_container_put(tvlv);
204}
205
206/**
207 * batadv_tvlv_container_unregister - unregister tvlv container based on the
208 * provided type and version (both need to match)
209 * @bat_priv: the bat priv with all the soft interface information
210 * @type: tvlv container type to unregister
211 * @version: tvlv container type to unregister
212 */
213void batadv_tvlv_container_unregister(struct batadv_priv *bat_priv,
214 u8 type, u8 version)
215{
216 struct batadv_tvlv_container *tvlv;
217
218 spin_lock_bh(&bat_priv->tvlv.container_list_lock);
219 tvlv = batadv_tvlv_container_get(bat_priv, type, version);
220 batadv_tvlv_container_remove(bat_priv, tvlv);
221 spin_unlock_bh(&bat_priv->tvlv.container_list_lock);
222}
223
224/**
225 * batadv_tvlv_container_register - register tvlv type, version and content
226 * to be propagated with each (primary interface) OGM
227 * @bat_priv: the bat priv with all the soft interface information
228 * @type: tvlv container type
229 * @version: tvlv container version
230 * @tvlv_value: tvlv container content
231 * @tvlv_value_len: tvlv container content length
232 *
233 * If a container of the same type and version was already registered the new
234 * content is going to replace the old one.
235 */
236void batadv_tvlv_container_register(struct batadv_priv *bat_priv,
237 u8 type, u8 version,
238 void *tvlv_value, u16 tvlv_value_len)
239{
240 struct batadv_tvlv_container *tvlv_old, *tvlv_new;
241
242 if (!tvlv_value)
243 tvlv_value_len = 0;
244
245 tvlv_new = kzalloc(sizeof(*tvlv_new) + tvlv_value_len, GFP_ATOMIC);
246 if (!tvlv_new)
247 return;
248
249 tvlv_new->tvlv_hdr.version = version;
250 tvlv_new->tvlv_hdr.type = type;
251 tvlv_new->tvlv_hdr.len = htons(tvlv_value_len);
252
253 memcpy(tvlv_new + 1, tvlv_value, ntohs(tvlv_new->tvlv_hdr.len));
254 INIT_HLIST_NODE(&tvlv_new->list);
255 kref_init(&tvlv_new->refcount);
256
257 spin_lock_bh(&bat_priv->tvlv.container_list_lock);
258 tvlv_old = batadv_tvlv_container_get(bat_priv, type, version);
259 batadv_tvlv_container_remove(bat_priv, tvlv_old);
260 hlist_add_head(&tvlv_new->list, &bat_priv->tvlv.container_list);
261 spin_unlock_bh(&bat_priv->tvlv.container_list_lock);
262}
263
264/**
265 * batadv_tvlv_realloc_packet_buff - reallocate packet buffer to accommodate
266 * requested packet size
267 * @packet_buff: packet buffer
268 * @packet_buff_len: packet buffer size
269 * @min_packet_len: requested packet minimum size
270 * @additional_packet_len: requested additional packet size on top of minimum
271 * size
272 *
273 * Return: true of the packet buffer could be changed to the requested size,
274 * false otherwise.
275 */
276static bool batadv_tvlv_realloc_packet_buff(unsigned char **packet_buff,
277 int *packet_buff_len,
278 int min_packet_len,
279 int additional_packet_len)
280{
281 unsigned char *new_buff;
282
283 new_buff = kmalloc(min_packet_len + additional_packet_len, GFP_ATOMIC);
284
285 /* keep old buffer if kmalloc should fail */
286 if (!new_buff)
287 return false;
288
289 memcpy(new_buff, *packet_buff, min_packet_len);
290 kfree(*packet_buff);
291 *packet_buff = new_buff;
292 *packet_buff_len = min_packet_len + additional_packet_len;
293
294 return true;
295}
296
297/**
298 * batadv_tvlv_container_ogm_append - append tvlv container content to given
299 * OGM packet buffer
300 * @bat_priv: the bat priv with all the soft interface information
301 * @packet_buff: ogm packet buffer
302 * @packet_buff_len: ogm packet buffer size including ogm header and tvlv
303 * content
304 * @packet_min_len: ogm header size to be preserved for the OGM itself
305 *
306 * The ogm packet might be enlarged or shrunk depending on the current size
307 * and the size of the to-be-appended tvlv containers.
308 *
309 * Return: size of all appended tvlv containers in bytes.
310 */
311u16 batadv_tvlv_container_ogm_append(struct batadv_priv *bat_priv,
312 unsigned char **packet_buff,
313 int *packet_buff_len, int packet_min_len)
314{
315 struct batadv_tvlv_container *tvlv;
316 struct batadv_tvlv_hdr *tvlv_hdr;
317 u16 tvlv_value_len;
318 void *tvlv_value;
319 bool ret;
320
321 spin_lock_bh(&bat_priv->tvlv.container_list_lock);
322 tvlv_value_len = batadv_tvlv_container_list_size(bat_priv);
323
324 ret = batadv_tvlv_realloc_packet_buff(packet_buff, packet_buff_len,
325 packet_min_len, tvlv_value_len);
326
327 if (!ret)
328 goto end;
329
330 if (!tvlv_value_len)
331 goto end;
332
333 tvlv_value = (*packet_buff) + packet_min_len;
334
335 hlist_for_each_entry(tvlv, &bat_priv->tvlv.container_list, list) {
336 tvlv_hdr = tvlv_value;
337 tvlv_hdr->type = tvlv->tvlv_hdr.type;
338 tvlv_hdr->version = tvlv->tvlv_hdr.version;
339 tvlv_hdr->len = tvlv->tvlv_hdr.len;
340 tvlv_value = tvlv_hdr + 1;
341 memcpy(tvlv_value, tvlv + 1, ntohs(tvlv->tvlv_hdr.len));
342 tvlv_value = (u8 *)tvlv_value + ntohs(tvlv->tvlv_hdr.len);
343 }
344
345end:
346 spin_unlock_bh(&bat_priv->tvlv.container_list_lock);
347 return tvlv_value_len;
348}
349
350/**
351 * batadv_tvlv_call_handler - parse the given tvlv buffer to call the
352 * appropriate handlers
353 * @bat_priv: the bat priv with all the soft interface information
354 * @tvlv_handler: tvlv callback function handling the tvlv content
355 * @ogm_source: flag indicating whether the tvlv is an ogm or a unicast packet
356 * @orig_node: orig node emitting the ogm packet
357 * @src: source mac address of the unicast packet
358 * @dst: destination mac address of the unicast packet
359 * @tvlv_value: tvlv content
360 * @tvlv_value_len: tvlv content length
361 *
362 * Return: success if handler was not found or the return value of the handler
363 * callback.
364 */
365static int batadv_tvlv_call_handler(struct batadv_priv *bat_priv,
366 struct batadv_tvlv_handler *tvlv_handler,
367 bool ogm_source,
368 struct batadv_orig_node *orig_node,
369 u8 *src, u8 *dst,
370 void *tvlv_value, u16 tvlv_value_len)
371{
372 if (!tvlv_handler)
373 return NET_RX_SUCCESS;
374
375 if (ogm_source) {
376 if (!tvlv_handler->ogm_handler)
377 return NET_RX_SUCCESS;
378
379 if (!orig_node)
380 return NET_RX_SUCCESS;
381
382 tvlv_handler->ogm_handler(bat_priv, orig_node,
383 BATADV_NO_FLAGS,
384 tvlv_value, tvlv_value_len);
385 tvlv_handler->flags |= BATADV_TVLV_HANDLER_OGM_CALLED;
386 } else {
387 if (!src)
388 return NET_RX_SUCCESS;
389
390 if (!dst)
391 return NET_RX_SUCCESS;
392
393 if (!tvlv_handler->unicast_handler)
394 return NET_RX_SUCCESS;
395
396 return tvlv_handler->unicast_handler(bat_priv, src,
397 dst, tvlv_value,
398 tvlv_value_len);
399 }
400
401 return NET_RX_SUCCESS;
402}
403
404/**
405 * batadv_tvlv_containers_process - parse the given tvlv buffer to call the
406 * appropriate handlers
407 * @bat_priv: the bat priv with all the soft interface information
408 * @ogm_source: flag indicating whether the tvlv is an ogm or a unicast packet
409 * @orig_node: orig node emitting the ogm packet
410 * @src: source mac address of the unicast packet
411 * @dst: destination mac address of the unicast packet
412 * @tvlv_value: tvlv content
413 * @tvlv_value_len: tvlv content length
414 *
415 * Return: success when processing an OGM or the return value of all called
416 * handler callbacks.
417 */
418int batadv_tvlv_containers_process(struct batadv_priv *bat_priv,
419 bool ogm_source,
420 struct batadv_orig_node *orig_node,
421 u8 *src, u8 *dst,
422 void *tvlv_value, u16 tvlv_value_len)
423{
424 struct batadv_tvlv_handler *tvlv_handler;
425 struct batadv_tvlv_hdr *tvlv_hdr;
426 u16 tvlv_value_cont_len;
427 u8 cifnotfound = BATADV_TVLV_HANDLER_OGM_CIFNOTFND;
428 int ret = NET_RX_SUCCESS;
429
430 while (tvlv_value_len >= sizeof(*tvlv_hdr)) {
431 tvlv_hdr = tvlv_value;
432 tvlv_value_cont_len = ntohs(tvlv_hdr->len);
433 tvlv_value = tvlv_hdr + 1;
434 tvlv_value_len -= sizeof(*tvlv_hdr);
435
436 if (tvlv_value_cont_len > tvlv_value_len)
437 break;
438
439 tvlv_handler = batadv_tvlv_handler_get(bat_priv,
440 tvlv_hdr->type,
441 tvlv_hdr->version);
442
443 ret |= batadv_tvlv_call_handler(bat_priv, tvlv_handler,
444 ogm_source, orig_node,
445 src, dst, tvlv_value,
446 tvlv_value_cont_len);
447 if (tvlv_handler)
448 batadv_tvlv_handler_put(tvlv_handler);
449 tvlv_value = (u8 *)tvlv_value + tvlv_value_cont_len;
450 tvlv_value_len -= tvlv_value_cont_len;
451 }
452
453 if (!ogm_source)
454 return ret;
455
456 rcu_read_lock();
457 hlist_for_each_entry_rcu(tvlv_handler,
458 &bat_priv->tvlv.handler_list, list) {
459 if ((tvlv_handler->flags & BATADV_TVLV_HANDLER_OGM_CIFNOTFND) &&
460 !(tvlv_handler->flags & BATADV_TVLV_HANDLER_OGM_CALLED))
461 tvlv_handler->ogm_handler(bat_priv, orig_node,
462 cifnotfound, NULL, 0);
463
464 tvlv_handler->flags &= ~BATADV_TVLV_HANDLER_OGM_CALLED;
465 }
466 rcu_read_unlock();
467
468 return NET_RX_SUCCESS;
469}
470
471/**
472 * batadv_tvlv_ogm_receive - process an incoming ogm and call the appropriate
473 * handlers
474 * @bat_priv: the bat priv with all the soft interface information
475 * @batadv_ogm_packet: ogm packet containing the tvlv containers
476 * @orig_node: orig node emitting the ogm packet
477 */
478void batadv_tvlv_ogm_receive(struct batadv_priv *bat_priv,
479 struct batadv_ogm_packet *batadv_ogm_packet,
480 struct batadv_orig_node *orig_node)
481{
482 void *tvlv_value;
483 u16 tvlv_value_len;
484
485 if (!batadv_ogm_packet)
486 return;
487
488 tvlv_value_len = ntohs(batadv_ogm_packet->tvlv_len);
489 if (!tvlv_value_len)
490 return;
491
492 tvlv_value = batadv_ogm_packet + 1;
493
494 batadv_tvlv_containers_process(bat_priv, true, orig_node, NULL, NULL,
495 tvlv_value, tvlv_value_len);
496}
497
498/**
499 * batadv_tvlv_handler_register - register tvlv handler based on the provided
500 * type and version (both need to match) for ogm tvlv payload and/or unicast
501 * payload
502 * @bat_priv: the bat priv with all the soft interface information
503 * @optr: ogm tvlv handler callback function. This function receives the orig
504 * node, flags and the tvlv content as argument to process.
505 * @uptr: unicast tvlv handler callback function. This function receives the
506 * source & destination of the unicast packet as well as the tvlv content
507 * to process.
508 * @type: tvlv handler type to be registered
509 * @version: tvlv handler version to be registered
510 * @flags: flags to enable or disable TVLV API behavior
511 */
512void batadv_tvlv_handler_register(struct batadv_priv *bat_priv,
513 void (*optr)(struct batadv_priv *bat_priv,
514 struct batadv_orig_node *orig,
515 u8 flags,
516 void *tvlv_value,
517 u16 tvlv_value_len),
518 int (*uptr)(struct batadv_priv *bat_priv,
519 u8 *src, u8 *dst,
520 void *tvlv_value,
521 u16 tvlv_value_len),
522 u8 type, u8 version, u8 flags)
523{
524 struct batadv_tvlv_handler *tvlv_handler;
525
526 tvlv_handler = batadv_tvlv_handler_get(bat_priv, type, version);
527 if (tvlv_handler) {
528 batadv_tvlv_handler_put(tvlv_handler);
529 return;
530 }
531
532 tvlv_handler = kzalloc(sizeof(*tvlv_handler), GFP_ATOMIC);
533 if (!tvlv_handler)
534 return;
535
536 tvlv_handler->ogm_handler = optr;
537 tvlv_handler->unicast_handler = uptr;
538 tvlv_handler->type = type;
539 tvlv_handler->version = version;
540 tvlv_handler->flags = flags;
541 kref_init(&tvlv_handler->refcount);
542 INIT_HLIST_NODE(&tvlv_handler->list);
543
544 spin_lock_bh(&bat_priv->tvlv.handler_list_lock);
545 hlist_add_head_rcu(&tvlv_handler->list, &bat_priv->tvlv.handler_list);
546 spin_unlock_bh(&bat_priv->tvlv.handler_list_lock);
547}
548
549/**
550 * batadv_tvlv_handler_unregister - unregister tvlv handler based on the
551 * provided type and version (both need to match)
552 * @bat_priv: the bat priv with all the soft interface information
553 * @type: tvlv handler type to be unregistered
554 * @version: tvlv handler version to be unregistered
555 */
556void batadv_tvlv_handler_unregister(struct batadv_priv *bat_priv,
557 u8 type, u8 version)
558{
559 struct batadv_tvlv_handler *tvlv_handler;
560
561 tvlv_handler = batadv_tvlv_handler_get(bat_priv, type, version);
562 if (!tvlv_handler)
563 return;
564
565 batadv_tvlv_handler_put(tvlv_handler);
566 spin_lock_bh(&bat_priv->tvlv.handler_list_lock);
567 hlist_del_rcu(&tvlv_handler->list);
568 spin_unlock_bh(&bat_priv->tvlv.handler_list_lock);
569 batadv_tvlv_handler_put(tvlv_handler);
570}
571
572/**
573 * batadv_tvlv_unicast_send - send a unicast packet with tvlv payload to the
574 * specified host
575 * @bat_priv: the bat priv with all the soft interface information
576 * @src: source mac address of the unicast packet
577 * @dst: destination mac address of the unicast packet
578 * @type: tvlv type
579 * @version: tvlv version
580 * @tvlv_value: tvlv content
581 * @tvlv_value_len: tvlv content length
582 */
583void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, u8 *src,
584 u8 *dst, u8 type, u8 version,
585 void *tvlv_value, u16 tvlv_value_len)
586{
587 struct batadv_unicast_tvlv_packet *unicast_tvlv_packet;
588 struct batadv_tvlv_hdr *tvlv_hdr;
589 struct batadv_orig_node *orig_node;
590 struct sk_buff *skb;
591 unsigned char *tvlv_buff;
592 unsigned int tvlv_len;
593 ssize_t hdr_len = sizeof(*unicast_tvlv_packet);
594
595 orig_node = batadv_orig_hash_find(bat_priv, dst);
596 if (!orig_node)
597 return;
598
599 tvlv_len = sizeof(*tvlv_hdr) + tvlv_value_len;
600
601 skb = netdev_alloc_skb_ip_align(NULL, ETH_HLEN + hdr_len + tvlv_len);
602 if (!skb)
603 goto out;
604
605 skb->priority = TC_PRIO_CONTROL;
606 skb_reserve(skb, ETH_HLEN);
607 tvlv_buff = skb_put(skb, sizeof(*unicast_tvlv_packet) + tvlv_len);
608 unicast_tvlv_packet = (struct batadv_unicast_tvlv_packet *)tvlv_buff;
609 unicast_tvlv_packet->packet_type = BATADV_UNICAST_TVLV;
610 unicast_tvlv_packet->version = BATADV_COMPAT_VERSION;
611 unicast_tvlv_packet->ttl = BATADV_TTL;
612 unicast_tvlv_packet->reserved = 0;
613 unicast_tvlv_packet->tvlv_len = htons(tvlv_len);
614 unicast_tvlv_packet->align = 0;
615 ether_addr_copy(unicast_tvlv_packet->src, src);
616 ether_addr_copy(unicast_tvlv_packet->dst, dst);
617
618 tvlv_buff = (unsigned char *)(unicast_tvlv_packet + 1);
619 tvlv_hdr = (struct batadv_tvlv_hdr *)tvlv_buff;
620 tvlv_hdr->version = version;
621 tvlv_hdr->type = type;
622 tvlv_hdr->len = htons(tvlv_value_len);
623 tvlv_buff += sizeof(*tvlv_hdr);
624 memcpy(tvlv_buff, tvlv_value, tvlv_value_len);
625
626 if (batadv_send_skb_to_orig(skb, orig_node, NULL) == NET_XMIT_DROP)
627 kfree_skb(skb);
628out:
629 batadv_orig_node_put(orig_node);
630}