1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (C) 2007-2019 B.A.T.M.A.N. contributors: 3 * 4 * Marek Lindner, Simon Wunderlich 5 */ 6 7 #include "main.h" 8 9 #include <linux/byteorder/generic.h> 10 #include <linux/etherdevice.h> 11 #include <linux/gfp.h> 12 #include <linux/if_ether.h> 13 #include <linux/kernel.h> 14 #include <linux/kref.h> 15 #include <linux/list.h> 16 #include <linux/lockdep.h> 17 #include <linux/netdevice.h> 18 #include <linux/pkt_sched.h> 19 #include <linux/rculist.h> 20 #include <linux/rcupdate.h> 21 #include <linux/skbuff.h> 22 #include <linux/slab.h> 23 #include <linux/spinlock.h> 24 #include <linux/stddef.h> 25 #include <linux/string.h> 26 #include <linux/types.h> 27 #include <uapi/linux/batadv_packet.h> 28 29 #include "originator.h" 30 #include "send.h" 31 #include "tvlv.h" 32 33 /** 34 * batadv_tvlv_handler_release() - release tvlv handler from lists and queue for 35 * free after rcu grace period 36 * @ref: kref pointer of the tvlv 37 */ 38 static void batadv_tvlv_handler_release(struct kref *ref) 39 { 40 struct batadv_tvlv_handler *tvlv_handler; 41 42 tvlv_handler = container_of(ref, struct batadv_tvlv_handler, refcount); 43 kfree_rcu(tvlv_handler, rcu); 44 } 45 46 /** 47 * batadv_tvlv_handler_put() - decrement the tvlv container refcounter and 48 * possibly release it 49 * @tvlv_handler: the tvlv handler to free 50 */ 51 static void batadv_tvlv_handler_put(struct batadv_tvlv_handler *tvlv_handler) 52 { 53 kref_put(&tvlv_handler->refcount, batadv_tvlv_handler_release); 54 } 55 56 /** 57 * batadv_tvlv_handler_get() - retrieve tvlv handler from the tvlv handler list 58 * based on the provided type and version (both need to match) 59 * @bat_priv: the bat priv with all the soft interface information 60 * @type: tvlv handler type to look for 61 * @version: tvlv handler version to look for 62 * 63 * Return: tvlv handler if found or NULL otherwise. 64 */ 65 static struct batadv_tvlv_handler * 66 batadv_tvlv_handler_get(struct batadv_priv *bat_priv, u8 type, u8 version) 67 { 68 struct batadv_tvlv_handler *tvlv_handler_tmp, *tvlv_handler = NULL; 69 70 rcu_read_lock(); 71 hlist_for_each_entry_rcu(tvlv_handler_tmp, 72 &bat_priv->tvlv.handler_list, list) { 73 if (tvlv_handler_tmp->type != type) 74 continue; 75 76 if (tvlv_handler_tmp->version != version) 77 continue; 78 79 if (!kref_get_unless_zero(&tvlv_handler_tmp->refcount)) 80 continue; 81 82 tvlv_handler = tvlv_handler_tmp; 83 break; 84 } 85 rcu_read_unlock(); 86 87 return tvlv_handler; 88 } 89 90 /** 91 * batadv_tvlv_container_release() - release tvlv from lists and free 92 * @ref: kref pointer of the tvlv 93 */ 94 static void batadv_tvlv_container_release(struct kref *ref) 95 { 96 struct batadv_tvlv_container *tvlv; 97 98 tvlv = container_of(ref, struct batadv_tvlv_container, refcount); 99 kfree(tvlv); 100 } 101 102 /** 103 * batadv_tvlv_container_put() - decrement the tvlv container refcounter and 104 * possibly release it 105 * @tvlv: the tvlv container to free 106 */ 107 static void batadv_tvlv_container_put(struct batadv_tvlv_container *tvlv) 108 { 109 kref_put(&tvlv->refcount, batadv_tvlv_container_release); 110 } 111 112 /** 113 * batadv_tvlv_container_get() - retrieve tvlv container from the tvlv container 114 * list based on the provided type and version (both need to match) 115 * @bat_priv: the bat priv with all the soft interface information 116 * @type: tvlv container type to look for 117 * @version: tvlv container version to look for 118 * 119 * Has to be called with the appropriate locks being acquired 120 * (tvlv.container_list_lock). 121 * 122 * Return: tvlv container if found or NULL otherwise. 123 */ 124 static struct batadv_tvlv_container * 125 batadv_tvlv_container_get(struct batadv_priv *bat_priv, u8 type, u8 version) 126 { 127 struct batadv_tvlv_container *tvlv_tmp, *tvlv = NULL; 128 129 lockdep_assert_held(&bat_priv->tvlv.container_list_lock); 130 131 hlist_for_each_entry(tvlv_tmp, &bat_priv->tvlv.container_list, list) { 132 if (tvlv_tmp->tvlv_hdr.type != type) 133 continue; 134 135 if (tvlv_tmp->tvlv_hdr.version != version) 136 continue; 137 138 kref_get(&tvlv_tmp->refcount); 139 tvlv = tvlv_tmp; 140 break; 141 } 142 143 return tvlv; 144 } 145 146 /** 147 * batadv_tvlv_container_list_size() - calculate the size of the tvlv container 148 * list entries 149 * @bat_priv: the bat priv with all the soft interface information 150 * 151 * Has to be called with the appropriate locks being acquired 152 * (tvlv.container_list_lock). 153 * 154 * Return: size of all currently registered tvlv containers in bytes. 155 */ 156 static u16 batadv_tvlv_container_list_size(struct batadv_priv *bat_priv) 157 { 158 struct batadv_tvlv_container *tvlv; 159 u16 tvlv_len = 0; 160 161 lockdep_assert_held(&bat_priv->tvlv.container_list_lock); 162 163 hlist_for_each_entry(tvlv, &bat_priv->tvlv.container_list, list) { 164 tvlv_len += sizeof(struct batadv_tvlv_hdr); 165 tvlv_len += ntohs(tvlv->tvlv_hdr.len); 166 } 167 168 return tvlv_len; 169 } 170 171 /** 172 * batadv_tvlv_container_remove() - remove tvlv container from the tvlv 173 * container list 174 * @bat_priv: the bat priv with all the soft interface information 175 * @tvlv: the to be removed tvlv container 176 * 177 * Has to be called with the appropriate locks being acquired 178 * (tvlv.container_list_lock). 179 */ 180 static void batadv_tvlv_container_remove(struct batadv_priv *bat_priv, 181 struct batadv_tvlv_container *tvlv) 182 { 183 lockdep_assert_held(&bat_priv->tvlv.container_list_lock); 184 185 if (!tvlv) 186 return; 187 188 hlist_del(&tvlv->list); 189 190 /* first call to decrement the counter, second call to free */ 191 batadv_tvlv_container_put(tvlv); 192 batadv_tvlv_container_put(tvlv); 193 } 194 195 /** 196 * batadv_tvlv_container_unregister() - unregister tvlv container based on the 197 * provided type and version (both need to match) 198 * @bat_priv: the bat priv with all the soft interface information 199 * @type: tvlv container type to unregister 200 * @version: tvlv container type to unregister 201 */ 202 void batadv_tvlv_container_unregister(struct batadv_priv *bat_priv, 203 u8 type, u8 version) 204 { 205 struct batadv_tvlv_container *tvlv; 206 207 spin_lock_bh(&bat_priv->tvlv.container_list_lock); 208 tvlv = batadv_tvlv_container_get(bat_priv, type, version); 209 batadv_tvlv_container_remove(bat_priv, tvlv); 210 spin_unlock_bh(&bat_priv->tvlv.container_list_lock); 211 } 212 213 /** 214 * batadv_tvlv_container_register() - register tvlv type, version and content 215 * to be propagated with each (primary interface) OGM 216 * @bat_priv: the bat priv with all the soft interface information 217 * @type: tvlv container type 218 * @version: tvlv container version 219 * @tvlv_value: tvlv container content 220 * @tvlv_value_len: tvlv container content length 221 * 222 * If a container of the same type and version was already registered the new 223 * content is going to replace the old one. 224 */ 225 void batadv_tvlv_container_register(struct batadv_priv *bat_priv, 226 u8 type, u8 version, 227 void *tvlv_value, u16 tvlv_value_len) 228 { 229 struct batadv_tvlv_container *tvlv_old, *tvlv_new; 230 231 if (!tvlv_value) 232 tvlv_value_len = 0; 233 234 tvlv_new = kzalloc(sizeof(*tvlv_new) + tvlv_value_len, GFP_ATOMIC); 235 if (!tvlv_new) 236 return; 237 238 tvlv_new->tvlv_hdr.version = version; 239 tvlv_new->tvlv_hdr.type = type; 240 tvlv_new->tvlv_hdr.len = htons(tvlv_value_len); 241 242 memcpy(tvlv_new + 1, tvlv_value, ntohs(tvlv_new->tvlv_hdr.len)); 243 INIT_HLIST_NODE(&tvlv_new->list); 244 kref_init(&tvlv_new->refcount); 245 246 spin_lock_bh(&bat_priv->tvlv.container_list_lock); 247 tvlv_old = batadv_tvlv_container_get(bat_priv, type, version); 248 batadv_tvlv_container_remove(bat_priv, tvlv_old); 249 250 kref_get(&tvlv_new->refcount); 251 hlist_add_head(&tvlv_new->list, &bat_priv->tvlv.container_list); 252 spin_unlock_bh(&bat_priv->tvlv.container_list_lock); 253 254 /* don't return reference to new tvlv_container */ 255 batadv_tvlv_container_put(tvlv_new); 256 } 257 258 /** 259 * batadv_tvlv_realloc_packet_buff() - reallocate packet buffer to accommodate 260 * requested packet size 261 * @packet_buff: packet buffer 262 * @packet_buff_len: packet buffer size 263 * @min_packet_len: requested packet minimum size 264 * @additional_packet_len: requested additional packet size on top of minimum 265 * size 266 * 267 * Return: true of the packet buffer could be changed to the requested size, 268 * false otherwise. 269 */ 270 static bool batadv_tvlv_realloc_packet_buff(unsigned char **packet_buff, 271 int *packet_buff_len, 272 int min_packet_len, 273 int additional_packet_len) 274 { 275 unsigned char *new_buff; 276 277 new_buff = kmalloc(min_packet_len + additional_packet_len, GFP_ATOMIC); 278 279 /* keep old buffer if kmalloc should fail */ 280 if (!new_buff) 281 return false; 282 283 memcpy(new_buff, *packet_buff, min_packet_len); 284 kfree(*packet_buff); 285 *packet_buff = new_buff; 286 *packet_buff_len = min_packet_len + additional_packet_len; 287 288 return true; 289 } 290 291 /** 292 * batadv_tvlv_container_ogm_append() - append tvlv container content to given 293 * OGM packet buffer 294 * @bat_priv: the bat priv with all the soft interface information 295 * @packet_buff: ogm packet buffer 296 * @packet_buff_len: ogm packet buffer size including ogm header and tvlv 297 * content 298 * @packet_min_len: ogm header size to be preserved for the OGM itself 299 * 300 * The ogm packet might be enlarged or shrunk depending on the current size 301 * and the size of the to-be-appended tvlv containers. 302 * 303 * Return: size of all appended tvlv containers in bytes. 304 */ 305 u16 batadv_tvlv_container_ogm_append(struct batadv_priv *bat_priv, 306 unsigned char **packet_buff, 307 int *packet_buff_len, int packet_min_len) 308 { 309 struct batadv_tvlv_container *tvlv; 310 struct batadv_tvlv_hdr *tvlv_hdr; 311 u16 tvlv_value_len; 312 void *tvlv_value; 313 bool ret; 314 315 spin_lock_bh(&bat_priv->tvlv.container_list_lock); 316 tvlv_value_len = batadv_tvlv_container_list_size(bat_priv); 317 318 ret = batadv_tvlv_realloc_packet_buff(packet_buff, packet_buff_len, 319 packet_min_len, tvlv_value_len); 320 321 if (!ret) 322 goto end; 323 324 if (!tvlv_value_len) 325 goto end; 326 327 tvlv_value = (*packet_buff) + packet_min_len; 328 329 hlist_for_each_entry(tvlv, &bat_priv->tvlv.container_list, list) { 330 tvlv_hdr = tvlv_value; 331 tvlv_hdr->type = tvlv->tvlv_hdr.type; 332 tvlv_hdr->version = tvlv->tvlv_hdr.version; 333 tvlv_hdr->len = tvlv->tvlv_hdr.len; 334 tvlv_value = tvlv_hdr + 1; 335 memcpy(tvlv_value, tvlv + 1, ntohs(tvlv->tvlv_hdr.len)); 336 tvlv_value = (u8 *)tvlv_value + ntohs(tvlv->tvlv_hdr.len); 337 } 338 339 end: 340 spin_unlock_bh(&bat_priv->tvlv.container_list_lock); 341 return tvlv_value_len; 342 } 343 344 /** 345 * batadv_tvlv_call_handler() - parse the given tvlv buffer to call the 346 * appropriate handlers 347 * @bat_priv: the bat priv with all the soft interface information 348 * @tvlv_handler: tvlv callback function handling the tvlv content 349 * @ogm_source: flag indicating whether the tvlv is an ogm or a unicast packet 350 * @orig_node: orig node emitting the ogm packet 351 * @src: source mac address of the unicast packet 352 * @dst: destination mac address of the unicast packet 353 * @tvlv_value: tvlv content 354 * @tvlv_value_len: tvlv content length 355 * 356 * Return: success if handler was not found or the return value of the handler 357 * callback. 358 */ 359 static int batadv_tvlv_call_handler(struct batadv_priv *bat_priv, 360 struct batadv_tvlv_handler *tvlv_handler, 361 bool ogm_source, 362 struct batadv_orig_node *orig_node, 363 u8 *src, u8 *dst, 364 void *tvlv_value, u16 tvlv_value_len) 365 { 366 if (!tvlv_handler) 367 return NET_RX_SUCCESS; 368 369 if (ogm_source) { 370 if (!tvlv_handler->ogm_handler) 371 return NET_RX_SUCCESS; 372 373 if (!orig_node) 374 return NET_RX_SUCCESS; 375 376 tvlv_handler->ogm_handler(bat_priv, orig_node, 377 BATADV_NO_FLAGS, 378 tvlv_value, tvlv_value_len); 379 tvlv_handler->flags |= BATADV_TVLV_HANDLER_OGM_CALLED; 380 } else { 381 if (!src) 382 return NET_RX_SUCCESS; 383 384 if (!dst) 385 return NET_RX_SUCCESS; 386 387 if (!tvlv_handler->unicast_handler) 388 return NET_RX_SUCCESS; 389 390 return tvlv_handler->unicast_handler(bat_priv, src, 391 dst, tvlv_value, 392 tvlv_value_len); 393 } 394 395 return NET_RX_SUCCESS; 396 } 397 398 /** 399 * batadv_tvlv_containers_process() - parse the given tvlv buffer to call the 400 * appropriate handlers 401 * @bat_priv: the bat priv with all the soft interface information 402 * @ogm_source: flag indicating whether the tvlv is an ogm or a unicast packet 403 * @orig_node: orig node emitting the ogm packet 404 * @src: source mac address of the unicast packet 405 * @dst: destination mac address of the unicast packet 406 * @tvlv_value: tvlv content 407 * @tvlv_value_len: tvlv content length 408 * 409 * Return: success when processing an OGM or the return value of all called 410 * handler callbacks. 411 */ 412 int batadv_tvlv_containers_process(struct batadv_priv *bat_priv, 413 bool ogm_source, 414 struct batadv_orig_node *orig_node, 415 u8 *src, u8 *dst, 416 void *tvlv_value, u16 tvlv_value_len) 417 { 418 struct batadv_tvlv_handler *tvlv_handler; 419 struct batadv_tvlv_hdr *tvlv_hdr; 420 u16 tvlv_value_cont_len; 421 u8 cifnotfound = BATADV_TVLV_HANDLER_OGM_CIFNOTFND; 422 int ret = NET_RX_SUCCESS; 423 424 while (tvlv_value_len >= sizeof(*tvlv_hdr)) { 425 tvlv_hdr = tvlv_value; 426 tvlv_value_cont_len = ntohs(tvlv_hdr->len); 427 tvlv_value = tvlv_hdr + 1; 428 tvlv_value_len -= sizeof(*tvlv_hdr); 429 430 if (tvlv_value_cont_len > tvlv_value_len) 431 break; 432 433 tvlv_handler = batadv_tvlv_handler_get(bat_priv, 434 tvlv_hdr->type, 435 tvlv_hdr->version); 436 437 ret |= batadv_tvlv_call_handler(bat_priv, tvlv_handler, 438 ogm_source, orig_node, 439 src, dst, tvlv_value, 440 tvlv_value_cont_len); 441 if (tvlv_handler) 442 batadv_tvlv_handler_put(tvlv_handler); 443 tvlv_value = (u8 *)tvlv_value + tvlv_value_cont_len; 444 tvlv_value_len -= tvlv_value_cont_len; 445 } 446 447 if (!ogm_source) 448 return ret; 449 450 rcu_read_lock(); 451 hlist_for_each_entry_rcu(tvlv_handler, 452 &bat_priv->tvlv.handler_list, list) { 453 if ((tvlv_handler->flags & BATADV_TVLV_HANDLER_OGM_CIFNOTFND) && 454 !(tvlv_handler->flags & BATADV_TVLV_HANDLER_OGM_CALLED)) 455 tvlv_handler->ogm_handler(bat_priv, orig_node, 456 cifnotfound, NULL, 0); 457 458 tvlv_handler->flags &= ~BATADV_TVLV_HANDLER_OGM_CALLED; 459 } 460 rcu_read_unlock(); 461 462 return NET_RX_SUCCESS; 463 } 464 465 /** 466 * batadv_tvlv_ogm_receive() - process an incoming ogm and call the appropriate 467 * handlers 468 * @bat_priv: the bat priv with all the soft interface information 469 * @batadv_ogm_packet: ogm packet containing the tvlv containers 470 * @orig_node: orig node emitting the ogm packet 471 */ 472 void batadv_tvlv_ogm_receive(struct batadv_priv *bat_priv, 473 struct batadv_ogm_packet *batadv_ogm_packet, 474 struct batadv_orig_node *orig_node) 475 { 476 void *tvlv_value; 477 u16 tvlv_value_len; 478 479 if (!batadv_ogm_packet) 480 return; 481 482 tvlv_value_len = ntohs(batadv_ogm_packet->tvlv_len); 483 if (!tvlv_value_len) 484 return; 485 486 tvlv_value = batadv_ogm_packet + 1; 487 488 batadv_tvlv_containers_process(bat_priv, true, orig_node, NULL, NULL, 489 tvlv_value, tvlv_value_len); 490 } 491 492 /** 493 * batadv_tvlv_handler_register() - register tvlv handler based on the provided 494 * type and version (both need to match) for ogm tvlv payload and/or unicast 495 * payload 496 * @bat_priv: the bat priv with all the soft interface information 497 * @optr: ogm tvlv handler callback function. This function receives the orig 498 * node, flags and the tvlv content as argument to process. 499 * @uptr: unicast tvlv handler callback function. This function receives the 500 * source & destination of the unicast packet as well as the tvlv content 501 * to process. 502 * @type: tvlv handler type to be registered 503 * @version: tvlv handler version to be registered 504 * @flags: flags to enable or disable TVLV API behavior 505 */ 506 void batadv_tvlv_handler_register(struct batadv_priv *bat_priv, 507 void (*optr)(struct batadv_priv *bat_priv, 508 struct batadv_orig_node *orig, 509 u8 flags, 510 void *tvlv_value, 511 u16 tvlv_value_len), 512 int (*uptr)(struct batadv_priv *bat_priv, 513 u8 *src, u8 *dst, 514 void *tvlv_value, 515 u16 tvlv_value_len), 516 u8 type, u8 version, u8 flags) 517 { 518 struct batadv_tvlv_handler *tvlv_handler; 519 520 spin_lock_bh(&bat_priv->tvlv.handler_list_lock); 521 522 tvlv_handler = batadv_tvlv_handler_get(bat_priv, type, version); 523 if (tvlv_handler) { 524 spin_unlock_bh(&bat_priv->tvlv.handler_list_lock); 525 batadv_tvlv_handler_put(tvlv_handler); 526 return; 527 } 528 529 tvlv_handler = kzalloc(sizeof(*tvlv_handler), GFP_ATOMIC); 530 if (!tvlv_handler) { 531 spin_unlock_bh(&bat_priv->tvlv.handler_list_lock); 532 return; 533 } 534 535 tvlv_handler->ogm_handler = optr; 536 tvlv_handler->unicast_handler = uptr; 537 tvlv_handler->type = type; 538 tvlv_handler->version = version; 539 tvlv_handler->flags = flags; 540 kref_init(&tvlv_handler->refcount); 541 INIT_HLIST_NODE(&tvlv_handler->list); 542 543 kref_get(&tvlv_handler->refcount); 544 hlist_add_head_rcu(&tvlv_handler->list, &bat_priv->tvlv.handler_list); 545 spin_unlock_bh(&bat_priv->tvlv.handler_list_lock); 546 547 /* don't return reference to new tvlv_handler */ 548 batadv_tvlv_handler_put(tvlv_handler); 549 } 550 551 /** 552 * batadv_tvlv_handler_unregister() - unregister tvlv handler based on the 553 * provided type and version (both need to match) 554 * @bat_priv: the bat priv with all the soft interface information 555 * @type: tvlv handler type to be unregistered 556 * @version: tvlv handler version to be unregistered 557 */ 558 void batadv_tvlv_handler_unregister(struct batadv_priv *bat_priv, 559 u8 type, u8 version) 560 { 561 struct batadv_tvlv_handler *tvlv_handler; 562 563 tvlv_handler = batadv_tvlv_handler_get(bat_priv, type, version); 564 if (!tvlv_handler) 565 return; 566 567 batadv_tvlv_handler_put(tvlv_handler); 568 spin_lock_bh(&bat_priv->tvlv.handler_list_lock); 569 hlist_del_rcu(&tvlv_handler->list); 570 spin_unlock_bh(&bat_priv->tvlv.handler_list_lock); 571 batadv_tvlv_handler_put(tvlv_handler); 572 } 573 574 /** 575 * batadv_tvlv_unicast_send() - send a unicast packet with tvlv payload to the 576 * specified host 577 * @bat_priv: the bat priv with all the soft interface information 578 * @src: source mac address of the unicast packet 579 * @dst: destination mac address of the unicast packet 580 * @type: tvlv type 581 * @version: tvlv version 582 * @tvlv_value: tvlv content 583 * @tvlv_value_len: tvlv content length 584 */ 585 void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, u8 *src, 586 u8 *dst, u8 type, u8 version, 587 void *tvlv_value, u16 tvlv_value_len) 588 { 589 struct batadv_unicast_tvlv_packet *unicast_tvlv_packet; 590 struct batadv_tvlv_hdr *tvlv_hdr; 591 struct batadv_orig_node *orig_node; 592 struct sk_buff *skb; 593 unsigned char *tvlv_buff; 594 unsigned int tvlv_len; 595 ssize_t hdr_len = sizeof(*unicast_tvlv_packet); 596 597 orig_node = batadv_orig_hash_find(bat_priv, dst); 598 if (!orig_node) 599 return; 600 601 tvlv_len = sizeof(*tvlv_hdr) + tvlv_value_len; 602 603 skb = netdev_alloc_skb_ip_align(NULL, ETH_HLEN + hdr_len + tvlv_len); 604 if (!skb) 605 goto out; 606 607 skb->priority = TC_PRIO_CONTROL; 608 skb_reserve(skb, ETH_HLEN); 609 tvlv_buff = skb_put(skb, sizeof(*unicast_tvlv_packet) + tvlv_len); 610 unicast_tvlv_packet = (struct batadv_unicast_tvlv_packet *)tvlv_buff; 611 unicast_tvlv_packet->packet_type = BATADV_UNICAST_TVLV; 612 unicast_tvlv_packet->version = BATADV_COMPAT_VERSION; 613 unicast_tvlv_packet->ttl = BATADV_TTL; 614 unicast_tvlv_packet->reserved = 0; 615 unicast_tvlv_packet->tvlv_len = htons(tvlv_len); 616 unicast_tvlv_packet->align = 0; 617 ether_addr_copy(unicast_tvlv_packet->src, src); 618 ether_addr_copy(unicast_tvlv_packet->dst, dst); 619 620 tvlv_buff = (unsigned char *)(unicast_tvlv_packet + 1); 621 tvlv_hdr = (struct batadv_tvlv_hdr *)tvlv_buff; 622 tvlv_hdr->version = version; 623 tvlv_hdr->type = type; 624 tvlv_hdr->len = htons(tvlv_value_len); 625 tvlv_buff += sizeof(*tvlv_hdr); 626 memcpy(tvlv_buff, tvlv_value, tvlv_value_len); 627 628 batadv_send_skb_to_orig(skb, orig_node, NULL); 629 out: 630 batadv_orig_node_put(orig_node); 631 } 632