mesh.c 30.3 KB
Newer Older
1
/*
2
 * Copyright (c) 2008, 2009 open80211s Ltd.
3 4 5 6 7 8 9 10
 * Authors:    Luis Carlos Cobo <luisca@cozybit.com>
 * 	       Javier Cardona <javier@cozybit.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

11
#include <linux/slab.h>
12
#include <asm/unaligned.h>
13 14 15
#include "ieee80211_i.h"
#include "mesh.h"

16 17
#define TMR_RUNNING_HK	0
#define TMR_RUNNING_MP	1
18
#define TMR_RUNNING_MPR	2
19

20 21 22
int mesh_allocated;
static struct kmem_cache *rm_cache;

23 24 25 26 27 28
bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt)
{
	return (mgmt->u.action.u.mesh_action.action_code ==
			WLAN_MESH_ACTION_HWMP_PATH_SELECTION);
}

29 30 31 32 33 34 35 36 37 38 39 40 41 42
void ieee80211s_init(void)
{
	mesh_pathtbl_init();
	mesh_allocated = 1;
	rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry),
				     0, 0, NULL);
}

void ieee80211s_stop(void)
{
	mesh_pathtbl_unregister();
	kmem_cache_destroy(rm_cache);
}

43 44 45 46 47 48
static void ieee80211_mesh_housekeeping_timer(unsigned long data)
{
	struct ieee80211_sub_if_data *sdata = (void *) data;
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;

49
	set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
50 51 52 53 54 55

	if (local->quiescing) {
		set_bit(TMR_RUNNING_HK, &ifmsh->timers_running);
		return;
	}

56
	ieee80211_queue_work(&local->hw, &sdata->work);
57 58
}

59 60 61
/**
 * mesh_matches_local - check if the config of a mesh point matches ours
 *
62
 * @sdata: local mesh subif
63
 * @ie: information elements of a management frame from the mesh peer
64 65 66 67
 *
 * This function checks if the mesh configuration of a mesh point matches the
 * local mesh configuration, i.e. if both nodes belong to the same mesh network.
 */
68 69
bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
			struct ieee802_11_elems *ie)
70
{
71
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
72
	struct ieee80211_local *local = sdata->local;
73
	u32 basic_rates = 0;
74
	struct cfg80211_chan_def sta_chan_def;
75 76 77 78 79 80 81 82 83 84 85

	/*
	 * As support for each feature is added, check for matching
	 * - On mesh config capabilities
	 *   - Power Save Support En
	 *   - Sync support enabled
	 *   - Sync support active
	 *   - Sync support required from peer
	 *   - MDA enabled
	 * - Power management control on fc
	 */
86 87 88 89 90 91 92 93 94
	if (!(ifmsh->mesh_id_len == ie->mesh_id_len &&
	     memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 &&
	     (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) &&
	     (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) &&
	     (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) &&
	     (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) &&
	     (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth)))
		goto mismatch;

Johannes Berg's avatar
Johannes Berg committed
95
	ieee80211_sta_get_rates(local, ie, ieee80211_get_sdata_band(sdata),
96 97
				&basic_rates);

98 99 100
	if (sdata->vif.bss_conf.basic_rates != basic_rates)
		goto mismatch;

101 102 103 104 105
	ieee80211_ht_oper_to_chandef(sdata->vif.bss_conf.chandef.chan,
				     ie->ht_operation, &sta_chan_def);

	if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef,
					 &sta_chan_def))
106
		goto mismatch;
107

108 109
	return true;
mismatch:
110 111 112 113 114 115 116 117
	return false;
}

/**
 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
 *
 * @ie: information elements of a management frame from the mesh peer
 */
118
bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie)
119
{
120
	return (ie->mesh_config->meshconf_cap &
121
	    IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0;
122 123 124
}

/**
125
 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons
126
 *
127
 * @sdata: mesh interface in which mesh beacons are going to be updated
128 129
 *
 * Returns: beacon changed flag if the beacon content changed.
130
 */
131
u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)
132 133
{
	bool free_plinks;
134
	u32 changed = 0;
135 136 137

	/* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,
	 * the mesh interface might be able to establish plinks with peers that
138 139 140
	 * are already on the table but are not on PLINK_ESTAB state. However,
	 * in general the mesh interface is not accepting peer link requests
	 * from new peers, and that must be reflected in the beacon
141 142 143
	 */
	free_plinks = mesh_plink_availables(sdata);

144 145 146 147 148 149
	if (free_plinks != sdata->u.mesh.accepting_plinks) {
		sdata->u.mesh.accepting_plinks = free_plinks;
		changed = BSS_CHANGED_BEACON;
	}

	return changed;
150 151
}

152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173
/*
 * mesh_sta_cleanup - clean up any mesh sta state
 *
 * @sta: mesh sta to clean up.
 */
void mesh_sta_cleanup(struct sta_info *sta)
{
	struct ieee80211_sub_if_data *sdata = sta->sdata;
	u32 changed;

	/*
	 * maybe userspace handles peer allocation and peering, but in either
	 * case the beacon is still generated by the kernel and we might need
	 * an update.
	 */
	changed = mesh_accept_plinks_update(sdata);
	if (sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) {
		changed |= mesh_plink_deactivate(sta);
		del_timer_sync(&sta->plink_timer);
	}

	if (changed)
Thomas Pedersen's avatar
Thomas Pedersen committed
174
		ieee80211_mbss_info_change_notify(sdata, changed);
175 176
}

177
int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
178 179 180
{
	int i;

181 182
	sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
	if (!sdata->u.mesh.rmc)
183
		return -ENOMEM;
184
	sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
185
	for (i = 0; i < RMC_BUCKETS; i++)
186
		INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i]);
187 188 189
	return 0;
}

190
void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
191
{
192
	struct mesh_rmc *rmc = sdata->u.mesh.rmc;
193 194 195
	struct rmc_entry *p, *n;
	int i;

196
	if (!sdata->u.mesh.rmc)
197 198 199
		return;

	for (i = 0; i < RMC_BUCKETS; i++)
200
		list_for_each_entry_safe(p, n, &rmc->bucket[i], list) {
201 202 203 204 205
			list_del(&p->list);
			kmem_cache_free(rm_cache, p);
		}

	kfree(rmc);
206
	sdata->u.mesh.rmc = NULL;
207 208 209 210 211 212 213 214 215 216 217 218 219 220 221
}

/**
 * mesh_rmc_check - Check frame in recent multicast cache and add if absent.
 *
 * @sa:		source address
 * @mesh_hdr:	mesh_header
 *
 * Returns: 0 if the frame is not in the cache, nonzero otherwise.
 *
 * Checks using the source address and the mesh sequence number if we have
 * received this frame lately. If the frame is not in the cache, it is added to
 * it.
 */
int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr,
222
		   struct ieee80211_sub_if_data *sdata)
223
{
224
	struct mesh_rmc *rmc = sdata->u.mesh.rmc;
225 226 227 228 229 230
	u32 seqnum = 0;
	int entries = 0;
	u8 idx;
	struct rmc_entry *p, *n;

	/* Don't care about endianness since only match matters */
231 232
	memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
	idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
233
	list_for_each_entry_safe(p, n, &rmc->bucket[idx], list) {
234 235 236 237 238 239
		++entries;
		if (time_after(jiffies, p->exp_time) ||
				(entries == RMC_QUEUE_MAX_LEN)) {
			list_del(&p->list);
			kmem_cache_free(rm_cache, p);
			--entries;
240
		} else if ((seqnum == p->seqnum) &&
241
			   (ether_addr_equal(sa, p->sa)))
242 243 244 245
			return -1;
	}

	p = kmem_cache_alloc(rm_cache, GFP_ATOMIC);
246
	if (!p)
247
		return 0;
248

249 250 251
	p->seqnum = seqnum;
	p->exp_time = jiffies + RMC_TIMEOUT;
	memcpy(p->sa, sa, ETH_ALEN);
252
	list_add(&p->list, &rmc->bucket[idx]);
253 254 255
	return 0;
}

256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280
int
mesh_add_meshconf_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
	u8 *pos, neighbors;
	u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie);

	if (skb_tailroom(skb) < 2 + meshconf_len)
		return -ENOMEM;

	pos = skb_put(skb, 2 + meshconf_len);
	*pos++ = WLAN_EID_MESH_CONFIG;
	*pos++ = meshconf_len;

	/* Active path selection protocol ID */
	*pos++ = ifmsh->mesh_pp_id;
	/* Active path selection metric ID   */
	*pos++ = ifmsh->mesh_pm_id;
	/* Congestion control mode identifier */
	*pos++ = ifmsh->mesh_cc_id;
	/* Synchronization protocol identifier */
	*pos++ = ifmsh->mesh_sp_id;
	/* Authentication Protocol identifier */
	*pos++ = ifmsh->mesh_auth_id;
	/* Mesh Formation Info - number of neighbors */
281
	neighbors = atomic_read(&ifmsh->estab_plinks);
282 283 284 285
	/* Number of neighbor mesh STAs or 15 whichever is smaller */
	neighbors = (neighbors > 15) ? 15 : neighbors;
	*pos++ = neighbors << 1;
	/* Mesh capability */
286
	*pos = IEEE80211_MESHCONF_CAPAB_FORWARDING;
287
	*pos |= ifmsh->accepting_plinks ?
288
	    IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
289 290 291
	/* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
	*pos |= ifmsh->ps_peers_deep_sleep ?
	    IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00;
292
	*pos++ |= ifmsh->adjusting_tbtt ?
293
	    IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00;
294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316
	*pos++ = 0x00;

	return 0;
}

int
mesh_add_meshid_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
	u8 *pos;

	if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len)
		return -ENOMEM;

	pos = skb_put(skb, 2 + ifmsh->mesh_id_len);
	*pos++ = WLAN_EID_MESH_ID;
	*pos++ = ifmsh->mesh_id_len;
	if (ifmsh->mesh_id_len)
		memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len);

	return 0;
}

317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339
int mesh_add_awake_window_ie(struct sk_buff *skb,
			     struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
	u8 *pos;

	/* see IEEE802.11-2012 13.14.6 */
	if (ifmsh->ps_peers_light_sleep == 0 &&
	    ifmsh->ps_peers_deep_sleep == 0 &&
	    ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE)
		return 0;

	if (skb_tailroom(skb) < 4)
		return -ENOMEM;

	pos = skb_put(skb, 2 + 2);
	*pos++ = WLAN_EID_MESH_AWAKE_WINDOW;
	*pos++ = 2;
	put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos);

	return 0;
}

340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395
int
mesh_add_vendor_ies(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
	u8 offset, len;
	const u8 *data;

	if (!ifmsh->ie || !ifmsh->ie_len)
		return 0;

	/* fast-forward to vendor IEs */
	offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0);

	if (offset) {
		len = ifmsh->ie_len - offset;
		data = ifmsh->ie + offset;
		if (skb_tailroom(skb) < len)
			return -ENOMEM;
		memcpy(skb_put(skb, len), data, len);
	}

	return 0;
}

int
mesh_add_rsn_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
	u8 len = 0;
	const u8 *data;

	if (!ifmsh->ie || !ifmsh->ie_len)
		return 0;

	/* find RSN IE */
	data = ifmsh->ie;
	while (data < ifmsh->ie + ifmsh->ie_len) {
		if (*data == WLAN_EID_RSN) {
			len = data[1] + 2;
			break;
		}
		data++;
	}

	if (len) {
		if (skb_tailroom(skb) < len)
			return -ENOMEM;
		memcpy(skb_put(skb, len), data, len);
	}

	return 0;
}

int mesh_add_ds_params_ie(struct sk_buff *skb,
			  struct ieee80211_sub_if_data *sdata)
{
Johannes Berg's avatar
Johannes Berg committed
396 397
	struct ieee80211_chanctx_conf *chanctx_conf;
	struct ieee80211_channel *chan;
398
	u8 *pos;
399

400 401 402
	if (skb_tailroom(skb) < 3)
		return -ENOMEM;

Johannes Berg's avatar
Johannes Berg committed
403 404 405 406 407 408
	rcu_read_lock();
	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
	if (WARN_ON(!chanctx_conf)) {
		rcu_read_unlock();
		return -EINVAL;
	}
409
	chan = chanctx_conf->def.chan;
Johannes Berg's avatar
Johannes Berg committed
410 411
	rcu_read_unlock();

412 413 414 415
	pos = skb_put(skb, 2 + 1);
	*pos++ = WLAN_EID_DS_PARAMS;
	*pos++ = 1;
	*pos++ = ieee80211_frequency_to_channel(chan->center_freq);
416

417
	return 0;
418 419
}

420 421 422 423
int mesh_add_ht_cap_ie(struct sk_buff *skb,
		       struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_local *local = sdata->local;
Johannes Berg's avatar
Johannes Berg committed
424
	enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
425 426 427
	struct ieee80211_supported_band *sband;
	u8 *pos;

Johannes Berg's avatar
Johannes Berg committed
428
	sband = local->hw.wiphy->bands[band];
429
	if (!sband->ht_cap.ht_supported ||
430
	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
431 432 433 434 435 436
		return 0;

	if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
		return -ENOMEM;

	pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
437
	ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap);
438 439 440 441

	return 0;
}

442
int mesh_add_ht_oper_ie(struct sk_buff *skb,
443 444 445
			struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_local *local = sdata->local;
Johannes Berg's avatar
Johannes Berg committed
446 447
	struct ieee80211_chanctx_conf *chanctx_conf;
	struct ieee80211_channel *channel;
448
	enum nl80211_channel_type channel_type =
449
		cfg80211_get_chandef_type(&sdata->vif.bss_conf.chandef);
Johannes Berg's avatar
Johannes Berg committed
450 451
	struct ieee80211_supported_band *sband;
	struct ieee80211_sta_ht_cap *ht_cap;
452 453
	u8 *pos;

Johannes Berg's avatar
Johannes Berg committed
454 455 456 457 458 459
	rcu_read_lock();
	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
	if (WARN_ON(!chanctx_conf)) {
		rcu_read_unlock();
		return -EINVAL;
	}
460
	channel = chanctx_conf->def.chan;
Johannes Berg's avatar
Johannes Berg committed
461 462 463 464 465
	rcu_read_unlock();

	sband = local->hw.wiphy->bands[channel->band];
	ht_cap = &sband->ht_cap;

466 467 468
	if (!ht_cap->ht_supported || channel_type == NL80211_CHAN_NO_HT)
		return 0;

469
	if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation))
470 471
		return -ENOMEM;

472
	pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
473
	ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef,
474
				   sdata->vif.bss_conf.ht_operation_mode);
475 476 477

	return 0;
}
478 479 480 481
static void ieee80211_mesh_path_timer(unsigned long data)
{
	struct ieee80211_sub_if_data *sdata =
		(struct ieee80211_sub_if_data *) data;
482
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
483
	struct ieee80211_local *local = sdata->local;
484

485 486 487 488 489
	if (local->quiescing) {
		set_bit(TMR_RUNNING_MP, &ifmsh->timers_running);
		return;
	}

490
	ieee80211_queue_work(&local->hw, &sdata->work);
491 492
}

493 494 495 496 497 498 499 500 501 502 503 504 505 506
static void ieee80211_mesh_path_root_timer(unsigned long data)
{
	struct ieee80211_sub_if_data *sdata =
		(struct ieee80211_sub_if_data *) data;
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
	struct ieee80211_local *local = sdata->local;

	set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);

	if (local->quiescing) {
		set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running);
		return;
	}

507
	ieee80211_queue_work(&local->hw, &sdata->work);
508 509
}

510 511
void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
{
512
	if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)
513 514 515 516 517 518 519 520
		set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
	else {
		clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
		/* stop running timer */
		del_timer_sync(&ifmsh->mesh_path_root_timer);
	}
}

521 522 523 524 525 526 527 528 529 530
/**
 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
 * @hdr:    	802.11 frame header
 * @fc:		frame control field
 * @meshda:	destination address in the mesh
 * @meshsa:	source address address in the mesh.  Same as TA, as frame is
 *              locally originated.
 *
 * Return the length of the 802.11 (does not include a mesh control header)
 */
531 532 533
int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
				  const u8 *meshda, const u8 *meshsa)
{
534 535 536 537 538 539 540 541
	if (is_multicast_ether_addr(meshda)) {
		*fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
		/* DA TA SA */
		memcpy(hdr->addr1, meshda, ETH_ALEN);
		memcpy(hdr->addr2, meshsa, ETH_ALEN);
		memcpy(hdr->addr3, meshsa, ETH_ALEN);
		return 24;
	} else {
542
		*fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
543 544 545 546 547 548 549 550 551
		/* RA TA DA SA */
		memset(hdr->addr1, 0, ETH_ALEN);   /* RA is resolved later */
		memcpy(hdr->addr2, meshsa, ETH_ALEN);
		memcpy(hdr->addr3, meshda, ETH_ALEN);
		memcpy(hdr->addr4, meshsa, ETH_ALEN);
		return 30;
	}
}

Johannes Berg's avatar
Johannes Berg committed
552 553 554 555
/**
 * ieee80211_new_mesh_header - create a new mesh header
 * @meshhdr:    uninitialized mesh header
 * @sdata:	mesh interface to be used
556 557 558 559 560
 * @addr4or5:   1st address in the ae header, which may correspond to address 4
 *              (if addr6 is NULL) or address 5 (if addr6 is present). It may
 *              be NULL.
 * @addr6:	2nd address in the ae header, which corresponds to addr6 of the
 *              mesh frame
Johannes Berg's avatar
Johannes Berg committed
561 562 563 564
 *
 * Return the header length.
 */
int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr,
565 566
		struct ieee80211_sub_if_data *sdata, char *addr4or5,
		char *addr6)
Johannes Berg's avatar
Johannes Berg committed
567
{
568
	int aelen = 0;
569
	BUG_ON(!addr4or5 && addr6);
570
	memset(meshhdr, 0, sizeof(*meshhdr));
571 572 573
	meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
	put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum);
	sdata->u.mesh.mesh_seqnum++;
574
	if (addr4or5 && !addr6) {
575 576
		meshhdr->flags |= MESH_FLAGS_AE_A4;
		aelen += ETH_ALEN;
577 578
		memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
	} else if (addr4or5 && addr6) {
579 580
		meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
		aelen += 2 * ETH_ALEN;
581 582
		memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
		memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
583 584
	}
	return 6 + aelen;
Johannes Berg's avatar
Johannes Berg committed
585 586
}

587 588 589
static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
			   struct ieee80211_if_mesh *ifmsh)
{
590
	u32 changed;
591 592 593 594

	ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
	mesh_path_expire(sdata);

595
	changed = mesh_accept_plinks_update(sdata);
Thomas Pedersen's avatar
Thomas Pedersen committed
596
	ieee80211_mbss_info_change_notify(sdata, changed);
597 598 599 600 601

	mod_timer(&ifmsh->housekeeping_timer,
		  round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
}

602 603 604
static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
605
	u32 interval;
606 607

	mesh_path_tx_root_frame(sdata);
608 609 610 611 612 613

	if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN)
		interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
	else
		interval = ifmsh->mshcfg.dot11MeshHWMProotInterval;

614
	mod_timer(&ifmsh->mesh_path_root_timer,
615
		  round_jiffies(TU_TO_EXP_TIME(interval)));
616 617
}

618 619 620 621 622
#ifdef CONFIG_PM
void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;

623
	/* use atomic bitops in case all timers fire at the same time */
624 625 626 627 628

	if (del_timer_sync(&ifmsh->housekeeping_timer))
		set_bit(TMR_RUNNING_HK, &ifmsh->timers_running);
	if (del_timer_sync(&ifmsh->mesh_path_timer))
		set_bit(TMR_RUNNING_MP, &ifmsh->timers_running);
629 630
	if (del_timer_sync(&ifmsh->mesh_path_root_timer))
		set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running);
631 632 633 634 635 636 637 638 639 640
}

void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;

	if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running))
		add_timer(&ifmsh->housekeeping_timer);
	if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running))
		add_timer(&ifmsh->mesh_path_timer);
641 642
	if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running))
		add_timer(&ifmsh->mesh_path_root_timer);
643
	ieee80211_mesh_root_setup(ifmsh);
644 645
}
#endif
646

Thomas Pedersen's avatar
Thomas Pedersen committed
647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780
static int
ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
{
	struct beacon_data *bcn;
	int head_len, tail_len;
	struct sk_buff *skb;
	struct ieee80211_mgmt *mgmt;
	struct ieee80211_chanctx_conf *chanctx_conf;
	enum ieee80211_band band;
	u8 *pos;
	struct ieee80211_sub_if_data *sdata;
	int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) +
		      sizeof(mgmt->u.beacon);

	sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh);
	rcu_read_lock();
	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
	band = chanctx_conf->def.chan->band;
	rcu_read_unlock();

	head_len = hdr_len +
		   2 + /* NULL SSID */
		   2 + 8 + /* supported rates */
		   2 + 3; /* DS params */
	tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
		   2 + sizeof(struct ieee80211_ht_cap) +
		   2 + sizeof(struct ieee80211_ht_operation) +
		   2 + ifmsh->mesh_id_len +
		   2 + sizeof(struct ieee80211_meshconf_ie) +
		   2 + sizeof(__le16) + /* awake window */
		   ifmsh->ie_len;

	bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
	/* need an skb for IE builders to operate on */
	skb = dev_alloc_skb(max(head_len, tail_len));

	if (!bcn || !skb)
		goto out_free;

	/*
	 * pointers go into the block we allocated,
	 * memory is | beacon_data | head | tail |
	 */
	bcn->head = ((u8 *) bcn) + sizeof(*bcn);

	/* fill in the head */
	mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
	memset(mgmt, 0, hdr_len);
	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
					  IEEE80211_STYPE_BEACON);
	eth_broadcast_addr(mgmt->da);
	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
	memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
	ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt);
	mgmt->u.beacon.beacon_int =
		cpu_to_le16(sdata->vif.bss_conf.beacon_int);
	mgmt->u.beacon.capab_info |= cpu_to_le16(
		sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0);

	pos = skb_put(skb, 2);
	*pos++ = WLAN_EID_SSID;
	*pos++ = 0x0;

	if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
	    mesh_add_ds_params_ie(skb, sdata))
		goto out_free;

	bcn->head_len = skb->len;
	memcpy(bcn->head, skb->data, bcn->head_len);

	/* now the tail */
	skb_trim(skb, 0);
	bcn->tail = bcn->head + bcn->head_len;

	if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
	    mesh_add_rsn_ie(skb, sdata) ||
	    mesh_add_ht_cap_ie(skb, sdata) ||
	    mesh_add_ht_oper_ie(skb, sdata) ||
	    mesh_add_meshid_ie(skb, sdata) ||
	    mesh_add_meshconf_ie(skb, sdata) ||
	    mesh_add_awake_window_ie(skb, sdata) ||
	    mesh_add_vendor_ies(skb, sdata))
		goto out_free;

	bcn->tail_len = skb->len;
	memcpy(bcn->tail, skb->data, bcn->tail_len);

	dev_kfree_skb(skb);
	rcu_assign_pointer(ifmsh->beacon, bcn);
	return 0;
out_free:
	kfree(bcn);
	dev_kfree_skb(skb);
	return -ENOMEM;
}

static int
ieee80211_mesh_rebuild_beacon(struct ieee80211_if_mesh *ifmsh)
{
	struct ieee80211_sub_if_data *sdata;
	struct beacon_data *old_bcn;
	int ret;
	sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh);

	mutex_lock(&ifmsh->mtx);

	old_bcn = rcu_dereference_protected(ifmsh->beacon,
					    lockdep_is_held(&ifmsh->mtx));
	ret = ieee80211_mesh_build_beacon(ifmsh);
	if (ret)
		/* just reuse old beacon */
		goto out;

	if (old_bcn)
		kfree_rcu(old_bcn, rcu_head);
out:
	mutex_unlock(&ifmsh->mtx);
	return ret;
}

void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
				       u32 changed)
{
	if (sdata->vif.bss_conf.enable_beacon &&
	    (changed & (BSS_CHANGED_BEACON |
			BSS_CHANGED_HT |
			BSS_CHANGED_BASIC_RATES |
			BSS_CHANGED_BEACON_INT)))
		if (ieee80211_mesh_rebuild_beacon(&sdata->u.mesh))
			return;
	ieee80211_bss_info_change_notify(sdata, changed);
}

int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
781 782 783
{
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
	struct ieee80211_local *local = sdata->local;
784 785 786 787 788 789
	u32 changed = BSS_CHANGED_BEACON |
		      BSS_CHANGED_BEACON_ENABLED |
		      BSS_CHANGED_HT |
		      BSS_CHANGED_BASIC_RATES |
		      BSS_CHANGED_BEACON_INT;
	enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
790

791 792 793 794 795
	local->fif_other_bss++;
	/* mesh ifaces must set allmulti to forward mcast traffic */
	atomic_inc(&local->iff_allmultis);
	ieee80211_configure_filter(local);

796 797
	ifmsh->mesh_cc_id = 0;	/* Disabled */
	ifmsh->mesh_auth_id = 0;	/* Disabled */
798 799 800 801
	/* register sync ops from extensible synchronization framework */
	ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id);
	ifmsh->adjusting_tbtt = false;
	ifmsh->sync_offset_clockdrift_max = 0;
802
	set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
803
	ieee80211_mesh_root_setup(ifmsh);
804
	ieee80211_queue_work(&local->hw, &sdata->work);
805 806
	sdata->vif.bss_conf.ht_operation_mode =
				ifmsh->mshcfg.ht_opmode;
807
	sdata->vif.bss_conf.enable_beacon = true;
808
	sdata->vif.bss_conf.basic_rates =
809 810
		ieee80211_mandatory_rates(local, band);

811
	changed |= ieee80211_mps_local_status_update(sdata);
812

Thomas Pedersen's avatar
Thomas Pedersen committed
813 814 815 816 817
	if (ieee80211_mesh_build_beacon(ifmsh)) {
		ieee80211_stop_mesh(sdata);
		return -ENOMEM;
	}

818
	ieee80211_bss_info_change_notify(sdata, changed);
819 820

	netif_carrier_on(sdata->dev);
Thomas Pedersen's avatar
Thomas Pedersen committed
821
	return 0;
822 823 824 825
}

void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
{
826
	struct ieee80211_local *local = sdata->local;
827
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
Thomas Pedersen's avatar
Thomas Pedersen committed
828
	struct beacon_data *bcn;
829

830 831
	netif_carrier_off(sdata->dev);

832
	/* stop the beacon */
833
	ifmsh->mesh_id_len = 0;
834 835
	sdata->vif.bss_conf.enable_beacon = false;
	clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
836
	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
Thomas Pedersen's avatar
Thomas Pedersen committed
837 838 839 840 841 842
	mutex_lock(&ifmsh->mtx);
	bcn = rcu_dereference_protected(ifmsh->beacon,
					lockdep_is_held(&ifmsh->mtx));
	rcu_assign_pointer(ifmsh->beacon, NULL);
	kfree_rcu(bcn, rcu_head);
	mutex_unlock(&ifmsh->mtx);
843 844

	/* flush STAs and mpaths on this iface */
845
	sta_info_flush(sdata);
846
	mesh_path_flush_by_iface(sdata);
847

848 849 850 851
	/* free all potentially still buffered group-addressed frames */
	local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf);
	skb_queue_purge(&ifmsh->ps.bc_buf);

852
	del_timer_sync(&sdata->u.mesh.housekeeping_timer);
853
	del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
854
	del_timer_sync(&sdata->u.mesh.mesh_path_timer);
Johannes Berg's avatar
Johannes Berg committed
855 856 857 858 859 860 861
	/*
	 * If the timer fired while we waited for it, it will have
	 * requeued the work. Now the work will be running again
	 * but will not rearm the timer again because it checks
	 * whether the interface is running, which, at this point,
	 * it no longer is.
	 */
862
	cancel_work_sync(&sdata->work);
863 864 865 866

	local->fif_other_bss--;
	atomic_dec(&local->iff_allmultis);
	ieee80211_configure_filter(local);
867 868

	sdata->u.mesh.timers_running = 0;
869 870
}

871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927
static void
ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata,
			    struct ieee80211_mgmt *mgmt, size_t len)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
	struct sk_buff *presp;
	struct beacon_data *bcn;
	struct ieee80211_mgmt *hdr;
	struct ieee802_11_elems elems;
	size_t baselen;
	u8 *pos, *end;

	end = ((u8 *) mgmt) + len;
	pos = mgmt->u.probe_req.variable;
	baselen = (u8 *) pos - (u8 *) mgmt;
	if (baselen > len)
		return;

	ieee802_11_parse_elems(pos, len - baselen, &elems);

	/* 802.11-2012 10.1.4.3.2 */
	if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
	     !is_broadcast_ether_addr(mgmt->da)) ||
	    elems.ssid_len != 0)
		return;

	if (elems.mesh_id_len != 0 &&
	    (elems.mesh_id_len != ifmsh->mesh_id_len ||
	     memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len)))
		return;

	rcu_read_lock();
	bcn = rcu_dereference(ifmsh->beacon);

	if (!bcn)
		goto out;

	presp = dev_alloc_skb(local->tx_headroom +
			      bcn->head_len + bcn->tail_len);
	if (!presp)
		goto out;

	skb_reserve(presp, local->tx_headroom);
	memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len);
	memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len);
	hdr = (struct ieee80211_mgmt *) presp->data;
	hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
					 IEEE80211_STYPE_PROBE_RESP);
	memcpy(hdr->da, mgmt->sa, ETH_ALEN);
	mpl_dbg(sdata, "sending probe resp. to %pM\n", hdr->da);
	IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
	ieee80211_tx_skb(sdata, presp);
out:
	rcu_read_unlock();
}

928 929 930 931 932 933
static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
					u16 stype,
					struct ieee80211_mgmt *mgmt,
					size_t len,
					struct ieee80211_rx_status *rx_status)
{
Johannes Berg's avatar
Johannes Berg committed
934
	struct ieee80211_local *local = sdata->local;
935
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
936 937 938 939 940 941 942 943
	struct ieee802_11_elems elems;
	struct ieee80211_channel *channel;
	size_t baselen;
	int freq;
	enum ieee80211_band band = rx_status->band;

	/* ignore ProbeResp to foreign address */
	if (stype == IEEE80211_STYPE_PROBE_RESP &&
944
	    !ether_addr_equal(mgmt->da, sdata->vif.addr))
945 946 947 948 949 950 951 952 953
		return;

	baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
	if (baselen > len)
		return;

	ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
			       &elems);

954 955 956 957
	/* ignore non-mesh or secure / unsecure mismatch */
	if ((!elems.mesh_id || !elems.mesh_config) ||
	    (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) ||
	    (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE))
958 959
		return;

960
	if (elems.ds_params && elems.ds_params_len == 1)
961
		freq = ieee80211_channel_to_frequency(elems.ds_params[0], band);
962 963 964 965 966 967 968 969
	else
		freq = rx_status->freq;

	channel = ieee80211_get_channel(local->hw.wiphy, freq);

	if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
		return;

970
	if (mesh_matches_local(sdata, &elems))
971
		mesh_neighbour_update(sdata, mgmt->sa, &elems);
972 973 974 975

	if (ifmsh->sync_ops)
		ifmsh->sync_ops->rx_bcn_presp(sdata,
			stype, mgmt, &elems, rx_status);
976 977 978 979 980 981 982 983
}

static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
					  struct ieee80211_mgmt *mgmt,
					  size_t len,
					  struct ieee80211_rx_status *rx_status)
{
	switch (mgmt->u.action.category) {
984 985 986 987 988 989 990 991
	case WLAN_CATEGORY_SELF_PROTECTED:
		switch (mgmt->u.action.u.self_prot.action_code) {
		case WLAN_SP_MESH_PEERING_OPEN:
		case WLAN_SP_MESH_PEERING_CLOSE:
		case WLAN_SP_MESH_PEERING_CONFIRM:
			mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
			break;
		}
992
		break;
993 994 995
	case WLAN_CATEGORY_MESH_ACTION:
		if (mesh_action_is_path_sel(mgmt))
			mesh_rx_path_sel_frame(sdata, mgmt, len);
996 997 998 999
		break;
	}
}

1000 1001
void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
				   struct sk_buff *skb)
1002 1003 1004 1005 1006
{
	struct ieee80211_rx_status *rx_status;
	struct ieee80211_mgmt *mgmt;
	u16 stype;

1007
	rx_status = IEEE80211_SKB_RXCB(skb);
1008 1009 1010 1011 1012 1013 1014 1015 1016
	mgmt = (struct ieee80211_mgmt *) skb->data;
	stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;

	switch (stype) {
	case IEEE80211_STYPE_PROBE_RESP:
	case IEEE80211_STYPE_BEACON:
		ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
					    rx_status);
		break;
1017 1018 1019
	case IEEE80211_STYPE_PROBE_REQ:
		ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len);
		break;
1020 1021 1022 1023 1024 1025
	case IEEE80211_STYPE_ACTION:
		ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
		break;
	}
}

1026
void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata)
1027 1028 1029 1030 1031 1032 1033 1034
{
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;

	if (ifmsh->preq_queue_len &&
	    time_after(jiffies,
		       ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
		mesh_path_start_discovery(sdata);

1035 1036 1037
	if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags))
		mesh_mpath_table_grow();

1038
	if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags))
1039 1040 1041
		mesh_mpp_table_grow();

	if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags))
1042
		ieee80211_mesh_housekeeping(sdata, ifmsh);
1043 1044 1045

	if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags))
		ieee80211_mesh_rootpath(sdata);
1046 1047 1048

	if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags))
		mesh_sync_adjust_tbtt(sdata);
1049 1050 1051 1052 1053 1054 1055 1056 1057
}

void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local)
{
	struct ieee80211_sub_if_data *sdata;

	rcu_read_lock();
	list_for_each_entry_rcu(sdata, &local->interfaces, list)
		if (ieee80211_vif_is_mesh(&sdata->vif))
1058
			ieee80211_queue_work(&local->hw, &sdata->work);
1059 1060 1061
	rcu_read_unlock();
}

Johannes Berg's avatar
Johannes Berg committed
1062 1063
void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
{
1064
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1065
	static u8 zero_addr[ETH_ALEN] = {};
1066 1067 1068 1069 1070 1071 1072

	setup_timer(&ifmsh->housekeeping_timer,
		    ieee80211_mesh_housekeeping_timer,
		    (unsigned long) sdata);

	ifmsh->accepting_plinks = true;
	ifmsh->preq_id = 0;
1073
	ifmsh->sn = 0;
1074
	ifmsh->num_gates = 0;
1075
	atomic_set(&ifmsh->mpaths, 0);
1076
	mesh_rmc_init(sdata);
1077
	ifmsh->last_preq = jiffies;
1078
	ifmsh->next_perr = jiffies;
Johannes Berg's avatar
Johannes Berg committed
1079 1080 1081
	/* Allocate all mesh structures when creating the first mesh interface. */
	if (!mesh_allocated)
		ieee80211s_init();
1082
	setup_timer(&ifmsh->mesh_path_timer,
Johannes Berg's avatar
Johannes Berg committed
1083 1084
		    ieee80211_mesh_path_timer,
		    (unsigned long) sdata);
1085 1086 1087
	setup_timer(&ifmsh->mesh_path_root_timer,
		    ieee80211_mesh_path_root_timer,
		    (unsigned long) sdata);
1088
	INIT_LIST_HEAD(&ifmsh->preq_queue.list);
1089
	skb_queue_head_init(&ifmsh->ps.bc_buf);
1090
	spin_lock_init(&ifmsh->mesh_preq_queue_lock);
1091
	spin_lock_init(&ifmsh->sync_offset_lock);
Thomas Pedersen's avatar
Thomas Pedersen committed
1092 1093
	RCU_INIT_POINTER(ifmsh->beacon, NULL);
	mutex_init(&ifmsh->mtx);
1094 1095

	sdata->vif.bss_conf.bssid = zero_addr;
1096
}