1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (C) 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 if (!tvlv_handler) 54 return; 55 56 kref_put(&tvlv_handler->refcount, batadv_tvlv_handler_release); 57 } 58 59 /** 60 * batadv_tvlv_handler_get() - retrieve tvlv handler from the tvlv handler list 61 * based on the provided type and version (both need to match) 62 * @bat_priv: the bat priv with all the soft interface information 63 * @type: tvlv handler type to look for 64 * @version: tvlv handler version to look for 65 * 66 * Return: tvlv handler if found or NULL otherwise. 67 */ 68 static struct batadv_tvlv_handler * 69 batadv_tvlv_handler_get(struct batadv_priv *bat_priv, u8 type, u8 version) 70 { 71 struct batadv_tvlv_handler *tvlv_handler_tmp, *tvlv_handler = NULL; 72 73 rcu_read_lock(); 74 hlist_for_each_entry_rcu(tvlv_handler_tmp, 75 &bat_priv->tvlv.handler_list, list) { 76 if (tvlv_handler_tmp->type != type) 77 continue; 78 79 if (tvlv_handler_tmp->version != version) 80 continue; 81 82 if (!kref_get_unless_zero(&tvlv_handler_tmp->refcount)) 83 continue; 84 85 tvlv_handler = tvlv_handler_tmp; 86 break; 87 } 88 rcu_read_unlock(); 89 90 return tvlv_handler; 91 } 92 93 /** 94 * batadv_tvlv_container_release() - release tvlv from lists and free 95 * @ref: kref pointer of the tvlv 96 */ 97 static void batadv_tvlv_container_release(struct kref *ref) 98 { 99 struct batadv_tvlv_container *tvlv; 100 101 tvlv = container_of(ref, struct batadv_tvlv_container, refcount); 102 kfree(tvlv); 103 } 104 105 /** 106 * batadv_tvlv_container_put() - decrement the tvlv container refcounter and 107 * possibly release it 108 * @tvlv: the tvlv container to free 109 */ 110 static void batadv_tvlv_container_put(struct batadv_tvlv_container *tvlv) 111 { 112 if (!tvlv) 113 return; 114 115 kref_put(&tvlv->refcount, batadv_tvlv_container_release); 116 } 117 118 /** 119 * batadv_tvlv_container_get() - retrieve tvlv container from the tvlv container 120 * list based on the provided type and version (both need to match) 121 * @bat_priv: the bat priv with all the soft interface information 122 * @type: tvlv container type to look for 123 * @version: tvlv container version to look for 124 * 125 * Has to be called with the appropriate locks being acquired 126 * (tvlv.container_list_lock). 127 * 128 * Return: tvlv container if found or NULL otherwise. 129 */ 130 static struct batadv_tvlv_container * 131 batadv_tvlv_container_get(struct batadv_priv *bat_priv, u8 type, u8 version) 132 { 133 struct batadv_tvlv_container *tvlv_tmp, *tvlv = NULL; 134 135 lockdep_assert_held(&bat_priv->tvlv.container_list_lock); 136 137 hlist_for_each_entry(tvlv_tmp, &bat_priv->tvlv.container_list, list) { 138 if (tvlv_tmp->tvlv_hdr.type != type) 139 continue; 140 141 if (tvlv_tmp->tvlv_hdr.version != version) 142 continue; 143 144 kref_get(&tvlv_tmp->refcount); 145 tvlv = tvlv_tmp; 146 break; 147 } 148 149 return tvlv; 150 } 151 152 /** 153 * batadv_tvlv_container_list_size() - calculate the size of the tvlv container 154 * list entries 155 * @bat_priv: the bat priv with all the soft interface information 156 * 157 * Has to be called with the appropriate locks being acquired 158 * (tvlv.container_list_lock). 159 * 160 * Return: size of all currently registered tvlv containers in bytes. 161 */ 162 static u16 batadv_tvlv_container_list_size(struct batadv_priv *bat_priv) 163 { 164 struct batadv_tvlv_container *tvlv; 165 u16 tvlv_len = 0; 166 167 lockdep_assert_held(&bat_priv->tvlv.container_list_lock); 168 169 hlist_for_each_entry(tvlv, &bat_priv->tvlv.container_list, list) { 170 tvlv_len += sizeof(struct batadv_tvlv_hdr); 171 tvlv_len += ntohs(tvlv->tvlv_hdr.len); 172 } 173 174 return tvlv_len; 175 } 176 177 /** 178 * batadv_tvlv_container_remove() - remove tvlv container from the tvlv 179 * container list 180 * @bat_priv: the bat priv with all the soft interface information 181 * @tvlv: the to be removed tvlv container 182 * 183 * Has to be called with the appropriate locks being acquired 184 * (tvlv.container_list_lock). 185 */ 186 static void batadv_tvlv_container_remove(struct batadv_priv *bat_priv, 187 struct batadv_tvlv_container *tvlv) 188 { 189 lockdep_assert_held(&bat_priv->tvlv.container_list_lock); 190 191 if (!tvlv) 192 return; 193 194 hlist_del(&tvlv->list); 195 196 /* first call to decrement the counter, second call to free */ 197 batadv_tvlv_container_put(tvlv); 198 batadv_tvlv_container_put(tvlv); 199 } 200 201 /** 202 * batadv_tvlv_container_unregister() - unregister tvlv container based on the 203 * provided type and version (both need to match) 204 * @bat_priv: the bat priv with all the soft interface information 205 * @type: tvlv container type to unregister 206 * @version: tvlv container type to unregister 207 */ 208 void batadv_tvlv_container_unregister(struct batadv_priv *bat_priv, 209 u8 type, u8 version) 210 { 211 struct batadv_tvlv_container *tvlv; 212 213 spin_lock_bh(&bat_priv->tvlv.container_list_lock); 214 tvlv = batadv_tvlv_container_get(bat_priv, type, version); 215 batadv_tvlv_container_remove(bat_priv, tvlv); 216 spin_unlock_bh(&bat_priv->tvlv.container_list_lock); 217 } 218 219 /** 220 * batadv_tvlv_container_register() - register tvlv type, version and content 221 * to be propagated with each (primary interface) OGM 222 * @bat_priv: the bat priv with all the soft interface information 223 * @type: tvlv container type 224 * @version: tvlv container version 225 * @tvlv_value: tvlv container content 226 * @tvlv_value_len: tvlv container content length 227 * 228 * If a container of the same type and version was already registered the new 229 * content is going to replace the old one. 230 */ 231 void batadv_tvlv_container_register(struct batadv_priv *bat_priv, 232 u8 type, u8 version, 233 void *tvlv_value, u16 tvlv_value_len) 234 { 235 struct batadv_tvlv_container *tvlv_old, *tvlv_new; 236 237 if (!tvlv_value) 238 tvlv_value_len = 0; 239 240 tvlv_new = kzalloc(sizeof(*tvlv_new) + tvlv_value_len, GFP_ATOMIC); 241 if (!tvlv_new) 242 return; 243 244 tvlv_new->tvlv_hdr.version = version; 245 tvlv_new->tvlv_hdr.type = type; 246 tvlv_new->tvlv_hdr.len = htons(tvlv_value_len); 247 248 memcpy(tvlv_new + 1, tvlv_value, ntohs(tvlv_new->tvlv_hdr.len)); 249 INIT_HLIST_NODE(&tvlv_new->list); 250 kref_init(&tvlv_new->refcount); 251 252 spin_lock_bh(&bat_priv->tvlv.container_list_lock); 253 tvlv_old = batadv_tvlv_container_get(bat_priv, type, version); 254 batadv_tvlv_container_remove(bat_priv, tvlv_old); 255 256 kref_get(&tvlv_new->refcount); 257 hlist_add_head(&tvlv_new->list, &bat_priv->tvlv.container_list); 258 spin_unlock_bh(&bat_priv->tvlv.container_list_lock); 259 260 /* don't return reference to new tvlv_container */ 261 batadv_tvlv_container_put(tvlv_new); 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 */ 276 static 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 */ 311 u16 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 } 344 345 end: 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 the handler was not found or the return value of the 363 * handler callback. 364 */ 365 static 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 */ 418 int 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 batadv_tvlv_handler_put(tvlv_handler); 448 tvlv_value = (u8 *)tvlv_value + tvlv_value_cont_len; 449 tvlv_value_len -= tvlv_value_cont_len; 450 } 451 452 if (!ogm_source) 453 return ret; 454 455 rcu_read_lock(); 456 hlist_for_each_entry_rcu(tvlv_handler, 457 &bat_priv->tvlv.handler_list, list) { 458 if ((tvlv_handler->flags & BATADV_TVLV_HANDLER_OGM_CIFNOTFND) && 459 !(tvlv_handler->flags & BATADV_TVLV_HANDLER_OGM_CALLED)) 460 tvlv_handler->ogm_handler(bat_priv, orig_node, 461 cifnotfound, NULL, 0); 462 463 tvlv_handler->flags &= ~BATADV_TVLV_HANDLER_OGM_CALLED; 464 } 465 rcu_read_unlock(); 466 467 return NET_RX_SUCCESS; 468 } 469 470 /** 471 * batadv_tvlv_ogm_receive() - process an incoming ogm and call the appropriate 472 * handlers 473 * @bat_priv: the bat priv with all the soft interface information 474 * @batadv_ogm_packet: ogm packet containing the tvlv containers 475 * @orig_node: orig node emitting the ogm packet 476 */ 477 void batadv_tvlv_ogm_receive(struct batadv_priv *bat_priv, 478 struct batadv_ogm_packet *batadv_ogm_packet, 479 struct batadv_orig_node *orig_node) 480 { 481 void *tvlv_value; 482 u16 tvlv_value_len; 483 484 if (!batadv_ogm_packet) 485 return; 486 487 tvlv_value_len = ntohs(batadv_ogm_packet->tvlv_len); 488 if (!tvlv_value_len) 489 return; 490 491 tvlv_value = batadv_ogm_packet + 1; 492 493 batadv_tvlv_containers_process(bat_priv, true, orig_node, NULL, NULL, 494 tvlv_value, tvlv_value_len); 495 } 496 497 /** 498 * batadv_tvlv_handler_register() - register tvlv handler based on the provided 499 * type and version (both need to match) for ogm tvlv payload and/or unicast 500 * payload 501 * @bat_priv: the bat priv with all the soft interface information 502 * @optr: ogm tvlv handler callback function. This function receives the orig 503 * node, flags and the tvlv content as argument to process. 504 * @uptr: unicast tvlv handler callback function. This function receives the 505 * source & destination of the unicast packet as well as the tvlv content 506 * to process. 507 * @type: tvlv handler type to be registered 508 * @version: tvlv handler version to be registered 509 * @flags: flags to enable or disable TVLV API behavior 510 */ 511 void batadv_tvlv_handler_register(struct batadv_priv *bat_priv, 512 void (*optr)(struct batadv_priv *bat_priv, 513 struct batadv_orig_node *orig, 514 u8 flags, 515 void *tvlv_value, 516 u16 tvlv_value_len), 517 int (*uptr)(struct batadv_priv *bat_priv, 518 u8 *src, u8 *dst, 519 void *tvlv_value, 520 u16 tvlv_value_len), 521 u8 type, u8 version, u8 flags) 522 { 523 struct batadv_tvlv_handler *tvlv_handler; 524 525 spin_lock_bh(&bat_priv->tvlv.handler_list_lock); 526 527 tvlv_handler = batadv_tvlv_handler_get(bat_priv, type, version); 528 if (tvlv_handler) { 529 spin_unlock_bh(&bat_priv->tvlv.handler_list_lock); 530 batadv_tvlv_handler_put(tvlv_handler); 531 return; 532 } 533 534 tvlv_handler = kzalloc(sizeof(*tvlv_handler), GFP_ATOMIC); 535 if (!tvlv_handler) { 536 spin_unlock_bh(&bat_priv->tvlv.handler_list_lock); 537 return; 538 } 539 540 tvlv_handler->ogm_handler = optr; 541 tvlv_handler->unicast_handler = uptr; 542 tvlv_handler->type = type; 543 tvlv_handler->version = version; 544 tvlv_handler->flags = flags; 545 kref_init(&tvlv_handler->refcount); 546 INIT_HLIST_NODE(&tvlv_handler->list); 547 548 kref_get(&tvlv_handler->refcount); 549 hlist_add_head_rcu(&tvlv_handler->list, &bat_priv->tvlv.handler_list); 550 spin_unlock_bh(&bat_priv->tvlv.handler_list_lock); 551 552 /* don't return reference to new tvlv_handler */ 553 batadv_tvlv_handler_put(tvlv_handler); 554 } 555 556 /** 557 * batadv_tvlv_handler_unregister() - unregister tvlv handler based on the 558 * provided type and version (both need to match) 559 * @bat_priv: the bat priv with all the soft interface information 560 * @type: tvlv handler type to be unregistered 561 * @version: tvlv handler version to be unregistered 562 */ 563 void batadv_tvlv_handler_unregister(struct batadv_priv *bat_priv, 564 u8 type, u8 version) 565 { 566 struct batadv_tvlv_handler *tvlv_handler; 567 568 tvlv_handler = batadv_tvlv_handler_get(bat_priv, type, version); 569 if (!tvlv_handler) 570 return; 571 572 batadv_tvlv_handler_put(tvlv_handler); 573 spin_lock_bh(&bat_priv->tvlv.handler_list_lock); 574 hlist_del_rcu(&tvlv_handler->list); 575 spin_unlock_bh(&bat_priv->tvlv.handler_list_lock); 576 batadv_tvlv_handler_put(tvlv_handler); 577 } 578 579 /** 580 * batadv_tvlv_unicast_send() - send a unicast packet with tvlv payload to the 581 * specified host 582 * @bat_priv: the bat priv with all the soft interface information 583 * @src: source mac address of the unicast packet 584 * @dst: destination mac address of the unicast packet 585 * @type: tvlv type 586 * @version: tvlv version 587 * @tvlv_value: tvlv content 588 * @tvlv_value_len: tvlv content length 589 */ 590 void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, u8 *src, 591 u8 *dst, u8 type, u8 version, 592 void *tvlv_value, u16 tvlv_value_len) 593 { 594 struct batadv_unicast_tvlv_packet *unicast_tvlv_packet; 595 struct batadv_tvlv_hdr *tvlv_hdr; 596 struct batadv_orig_node *orig_node; 597 struct sk_buff *skb; 598 unsigned char *tvlv_buff; 599 unsigned int tvlv_len; 600 ssize_t hdr_len = sizeof(*unicast_tvlv_packet); 601 602 orig_node = batadv_orig_hash_find(bat_priv, dst); 603 if (!orig_node) 604 return; 605 606 tvlv_len = sizeof(*tvlv_hdr) + tvlv_value_len; 607 608 skb = netdev_alloc_skb_ip_align(NULL, ETH_HLEN + hdr_len + tvlv_len); 609 if (!skb) 610 goto out; 611 612 skb->priority = TC_PRIO_CONTROL; 613 skb_reserve(skb, ETH_HLEN); 614 tvlv_buff = skb_put(skb, sizeof(*unicast_tvlv_packet) + tvlv_len); 615 unicast_tvlv_packet = (struct batadv_unicast_tvlv_packet *)tvlv_buff; 616 unicast_tvlv_packet->packet_type = BATADV_UNICAST_TVLV; 617 unicast_tvlv_packet->version = BATADV_COMPAT_VERSION; 618 unicast_tvlv_packet->ttl = BATADV_TTL; 619 unicast_tvlv_packet->reserved = 0; 620 unicast_tvlv_packet->tvlv_len = htons(tvlv_len); 621 unicast_tvlv_packet->align = 0; 622 ether_addr_copy(unicast_tvlv_packet->src, src); 623 ether_addr_copy(unicast_tvlv_packet->dst, dst); 624 625 tvlv_buff = (unsigned char *)(unicast_tvlv_packet + 1); 626 tvlv_hdr = (struct batadv_tvlv_hdr *)tvlv_buff; 627 tvlv_hdr->version = version; 628 tvlv_hdr->type = type; 629 tvlv_hdr->len = htons(tvlv_value_len); 630 tvlv_buff += sizeof(*tvlv_hdr); 631 memcpy(tvlv_buff, tvlv_value, tvlv_value_len); 632 633 batadv_send_skb_to_orig(skb, orig_node, NULL); 634 out: 635 batadv_orig_node_put(orig_node); 636 } 637