mlme.c 146.1 KB
Newer Older
1 2
/*
 * BSS client mode implementation
3
 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 5 6 7
 * Copyright 2004, Instant802 Networks, Inc.
 * Copyright 2005, Devicescape Software, Inc.
 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8
 * Copyright 2013-2014  Intel Mobile Communications GmbH
9
 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
10 11 12 13 14 15
 *
 * 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.
 */

16
#include <linux/delay.h>
17 18 19 20
#include <linux/if_ether.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
21
#include <linux/moduleparam.h>
22
#include <linux/rtnetlink.h>
23
#include <linux/crc32.h>
24
#include <linux/slab.h>
25
#include <linux/export.h>
26
#include <net/mac80211.h>
27
#include <asm/unaligned.h>
J
Johannes Berg 已提交
28

29
#include "ieee80211_i.h"
30
#include "driver-ops.h"
J
Johannes Berg 已提交
31 32
#include "rate.h"
#include "led.h"
33
#include "fils_aead.h"
34

35
#define IEEE80211_AUTH_TIMEOUT		(HZ / 5)
36
#define IEEE80211_AUTH_TIMEOUT_LONG	(HZ / 2)
37 38 39 40
#define IEEE80211_AUTH_TIMEOUT_SHORT	(HZ / 10)
#define IEEE80211_AUTH_MAX_TRIES	3
#define IEEE80211_AUTH_WAIT_ASSOC	(HZ * 5)
#define IEEE80211_ASSOC_TIMEOUT		(HZ / 5)
41
#define IEEE80211_ASSOC_TIMEOUT_LONG	(HZ / 2)
42 43
#define IEEE80211_ASSOC_TIMEOUT_SHORT	(HZ / 10)
#define IEEE80211_ASSOC_MAX_TRIES	3
J
Johannes Berg 已提交
44

45 46 47 48 49 50 51 52 53
static int max_nullfunc_tries = 2;
module_param(max_nullfunc_tries, int, 0644);
MODULE_PARM_DESC(max_nullfunc_tries,
		 "Maximum nullfunc tx tries before disconnecting (reason 4).");

static int max_probe_tries = 5;
module_param(max_probe_tries, int, 0644);
MODULE_PARM_DESC(max_probe_tries,
		 "Maximum probe tries before disconnecting (reason 4).");
J
Johannes Berg 已提交
54 55

/*
56 57 58 59 60 61
 * Beacon loss timeout is calculated as N frames times the
 * advertised beacon interval.  This may need to be somewhat
 * higher than what hardware might detect to account for
 * delays in the host processing frames. But since we also
 * probe on beacon miss before declaring the connection lost
 * default to what we want.
J
Johannes Berg 已提交
62
 */
63 64 65 66
static int beacon_loss_count = 7;
module_param(beacon_loss_count, int, 0644);
MODULE_PARM_DESC(beacon_loss_count,
		 "Number of beacon intervals before we decide beacon was lost.");
67

J
Johannes Berg 已提交
68 69 70 71
/*
 * Time the connection can be idle before we probe
 * it to see if we can still talk to the AP.
 */
72
#define IEEE80211_CONNECTION_IDLE_TIME	(30 * HZ)
J
Johannes Berg 已提交
73 74 75 76 77
/*
 * Time we wait for a probe response after sending
 * a probe request because of beacon loss or for
 * checking the connection still works.
 */
78 79 80 81 82
static int probe_wait_ms = 500;
module_param(probe_wait_ms, int, 0644);
MODULE_PARM_DESC(probe_wait_ms,
		 "Maximum time(ms) to wait for probe response"
		 " before disconnecting (reason 4).");
83

84 85 86 87 88 89
/*
 * How many Beacon frames need to have been used in average signal strength
 * before starting to indicate signal change events.
 */
#define IEEE80211_SIGNAL_AVE_MIN_COUNT	4

J
Johannes Berg 已提交
90 91 92 93 94 95 96 97 98 99
/*
 * We can have multiple work items (and connection probing)
 * scheduling this timer, but we need to take care to only
 * reschedule it when it should fire _earlier_ than it was
 * asked for before, or if it's not pending right now. This
 * function ensures that. Note that it then is required to
 * run this function for all timeouts after the first one
 * has happened -- the work that runs from this timer will
 * do that.
 */
100 101
static void run_again(struct ieee80211_sub_if_data *sdata,
		      unsigned long timeout)
J
Johannes Berg 已提交
102
{
103
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
104

105 106 107
	if (!timer_pending(&sdata->u.mgd.timer) ||
	    time_before(timeout, sdata->u.mgd.timer.expires))
		mod_timer(&sdata->u.mgd.timer, timeout);
J
Johannes Berg 已提交
108 109
}

110
void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
J
Johannes Berg 已提交
111
{
112
	if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
J
Johannes Berg 已提交
113 114
		return;

115
	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
116 117
		return;

J
Johannes Berg 已提交
118
	mod_timer(&sdata->u.mgd.bcn_mon_timer,
119
		  round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
J
Johannes Berg 已提交
120 121
}

122 123
void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
{
124 125
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

126
	if (unlikely(!ifmgd->associated))
127 128
		return;

129 130
	if (ifmgd->probe_send_count)
		ifmgd->probe_send_count = 0;
131

132
	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133 134
		return;

135
	mod_timer(&ifmgd->conn_mon_timer,
136 137 138
		  round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
}

139
static int ecw2cw(int ecw)
J
Johannes Berg 已提交
140
{
141
	return (1 << ecw) - 1;
J
Johannes Berg 已提交
142 143
}

144 145 146 147
static u32
ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
			     struct ieee80211_supported_band *sband,
			     struct ieee80211_channel *channel,
148
			     const struct ieee80211_ht_cap *ht_cap,
149 150
			     const struct ieee80211_ht_operation *ht_oper,
			     const struct ieee80211_vht_operation *vht_oper,
151
			     struct cfg80211_chan_def *chandef, bool tracking)
152
{
153
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
154
	struct cfg80211_chan_def vht_chandef;
155
	struct ieee80211_sta_ht_cap sta_ht_cap;
156 157
	u32 ht_cfreq, ret;

158 159 160
	memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
	ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);

161 162 163 164 165
	chandef->chan = channel;
	chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
	chandef->center_freq1 = channel->center_freq;
	chandef->center_freq2 = 0;

166
	if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
167 168 169 170 171 172
		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
		goto out;
	}

	chandef->width = NL80211_CHAN_WIDTH_20;

173 174
	if (!(ht_cap->cap_info &
	      cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
175
		ret = IEEE80211_STA_DISABLE_40MHZ;
176
		vht_chandef = *chandef;
177 178 179
		goto out;
	}

180 181 182
	ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
						  channel->band);
	/* check that channel matches the right operating channel */
183
	if (!tracking && channel->center_freq != ht_cfreq) {
184 185 186 187 188 189 190
		/*
		 * It's possible that some APs are confused here;
		 * Netgear WNDR3700 sometimes reports 4 higher than
		 * the actual channel in association responses, but
		 * since we look at probe response/beacon data here
		 * it should be OK.
		 */
191 192 193 194
		sdata_info(sdata,
			   "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
			   channel->center_freq, ht_cfreq,
			   ht_oper->primary_chan, channel->band);
195 196 197 198 199
		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
		goto out;
	}

	/* check 40 MHz support, if we have it */
200
	if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
201
		ieee80211_chandef_ht_oper(ht_oper, chandef);
202 203 204
	} else {
		/* 40 MHz (and 80 MHz) must be supported for VHT */
		ret = IEEE80211_STA_DISABLE_VHT;
205 206
		/* also mark 40 MHz disabled */
		ret |= IEEE80211_STA_DISABLE_40MHZ;
207 208 209 210 211 212 213 214
		goto out;
	}

	if (!vht_oper || !sband->vht_cap.vht_supported) {
		ret = IEEE80211_STA_DISABLE_VHT;
		goto out;
	}

215 216
	vht_chandef = *chandef;
	if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
217
		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
218
			sdata_info(sdata,
219
				   "AP VHT information is invalid, disable VHT\n");
220 221 222 223 224
		ret = IEEE80211_STA_DISABLE_VHT;
		goto out;
	}

	if (!cfg80211_chandef_valid(&vht_chandef)) {
225
		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
226 227
			sdata_info(sdata,
				   "AP VHT information is invalid, disable VHT\n");
228 229 230 231 232 233 234 235 236 237
		ret = IEEE80211_STA_DISABLE_VHT;
		goto out;
	}

	if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
		ret = 0;
		goto out;
	}

	if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
238
		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
239 240
			sdata_info(sdata,
				   "AP VHT information doesn't match HT, disable VHT\n");
241 242 243 244 245 246 247 248 249
		ret = IEEE80211_STA_DISABLE_VHT;
		goto out;
	}

	*chandef = vht_chandef;

	ret = 0;

out:
250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271
	/*
	 * When tracking the current AP, don't do any further checks if the
	 * new chandef is identical to the one we're currently using for the
	 * connection. This keeps us from playing ping-pong with regulatory,
	 * without it the following can happen (for example):
	 *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
	 *  - AP advertises regdom US
	 *  - CRDA loads regdom US with 80 MHz prohibited (old database)
	 *  - the code below detects an unsupported channel, downgrades, and
	 *    we disconnect from the AP in the caller
	 *  - disconnect causes CRDA to reload world regdomain and the game
	 *    starts anew.
	 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
	 *
	 * It seems possible that there are still scenarios with CSA or real
	 * bandwidth changes where a this could happen, but those cases are
	 * less common and wouldn't completely prevent using the AP.
	 */
	if (tracking &&
	    cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
		return ret;

272 273 274 275
	/* don't print the message below for VHT mismatch if VHT is disabled */
	if (ret & IEEE80211_STA_DISABLE_VHT)
		vht_chandef = *chandef;

276 277 278 279 280 281 282 283
	/*
	 * Ignore the DISABLED flag when we're already connected and only
	 * tracking the APs beacon for bandwidth changes - otherwise we
	 * might get disconnected here if we connect to an AP, update our
	 * regulatory information based on the AP's country IE and the
	 * information we have is wrong/outdated and disables the channel
	 * that we're actually using for the connection to the AP.
	 */
284
	while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
285 286
					tracking ? 0 :
						   IEEE80211_CHAN_DISABLED)) {
287 288 289
		if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
			ret = IEEE80211_STA_DISABLE_HT |
			      IEEE80211_STA_DISABLE_VHT;
290
			break;
291 292
		}

293
		ret |= ieee80211_chandef_downgrade(chandef);
294 295
	}

296
	if (chandef->width != vht_chandef.width && !tracking)
297 298 299 300 301 302 303
		sdata_info(sdata,
			   "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");

	WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
	return ret;
}

304 305
static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
			       struct sta_info *sta,
306
			       const struct ieee80211_ht_cap *ht_cap,
307 308 309
			       const struct ieee80211_ht_operation *ht_oper,
			       const struct ieee80211_vht_operation *vht_oper,
			       const u8 *bssid, u32 *changed)
310 311
{
	struct ieee80211_local *local = sdata->local;
312
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
313
	struct ieee80211_supported_band *sband;
J
Johannes Berg 已提交
314
	struct ieee80211_channel *chan;
315
	struct cfg80211_chan_def chandef;
316
	u16 ht_opmode;
317 318 319
	u32 flags;
	enum ieee80211_sta_rx_bandwidth new_sta_bw;
	int ret;
320

321 322
	/* if HT was/is disabled, don't track any bandwidth changes */
	if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
323 324
		return 0;

325 326 327 328 329 330 331
	/* don't check VHT if we associated as non-VHT station */
	if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
		vht_oper = NULL;

	if (WARN_ON_ONCE(!sta))
		return -EINVAL;

332 333 334 335 336 337 338 339 340 341
	/*
	 * if bss configuration changed store the new one -
	 * this may be applicable even if channel is identical
	 */
	ht_opmode = le16_to_cpu(ht_oper->operation_mode);
	if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
		*changed |= BSS_CHANGED_HT;
		sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
	}

342
	chan = sdata->vif.bss_conf.chandef.chan;
J
Johannes Berg 已提交
343
	sband = local->hw.wiphy->bands[chan->band];
344

345
	/* calculate new channel (type) based on HT/VHT operation IEs */
346 347 348
	flags = ieee80211_determine_chantype(sdata, sband, chan,
					     ht_cap, ht_oper, vht_oper,
					     &chandef, true);
349 350 351 352 353 354 355 356 357 358

	/*
	 * Downgrade the new channel if we associated with restricted
	 * capabilities. For example, if we associated as a 20 MHz STA
	 * to a 40 MHz AP (due to regulatory, capabilities or config
	 * reasons) then switching to a 40 MHz channel now won't do us
	 * any good -- we couldn't use it with the AP.
	 */
	if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
	    chandef.width == NL80211_CHAN_WIDTH_80P80)
359
		flags |= ieee80211_chandef_downgrade(&chandef);
360 361
	if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
	    chandef.width == NL80211_CHAN_WIDTH_160)
362
		flags |= ieee80211_chandef_downgrade(&chandef);
363 364
	if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
	    chandef.width > NL80211_CHAN_WIDTH_20)
365
		flags |= ieee80211_chandef_downgrade(&chandef);
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

	if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
		return 0;

	sdata_info(sdata,
		   "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
		   ifmgd->bssid, chandef.chan->center_freq, chandef.width,
		   chandef.center_freq1, chandef.center_freq2);

	if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
				      IEEE80211_STA_DISABLE_VHT |
				      IEEE80211_STA_DISABLE_40MHZ |
				      IEEE80211_STA_DISABLE_80P80MHZ |
				      IEEE80211_STA_DISABLE_160MHZ)) ||
	    !cfg80211_chandef_valid(&chandef)) {
		sdata_info(sdata,
			   "AP %pM changed bandwidth in a way we can't support - disconnect\n",
			   ifmgd->bssid);
		return -EINVAL;
	}

	switch (chandef.width) {
	case NL80211_CHAN_WIDTH_20_NOHT:
	case NL80211_CHAN_WIDTH_20:
		new_sta_bw = IEEE80211_STA_RX_BW_20;
		break;
392
	case NL80211_CHAN_WIDTH_40:
393
		new_sta_bw = IEEE80211_STA_RX_BW_40;
394
		break;
395 396 397 398 399 400
	case NL80211_CHAN_WIDTH_80:
		new_sta_bw = IEEE80211_STA_RX_BW_80;
		break;
	case NL80211_CHAN_WIDTH_80P80:
	case NL80211_CHAN_WIDTH_160:
		new_sta_bw = IEEE80211_STA_RX_BW_160;
401
		break;
402 403
	default:
		return -EINVAL;
404
	}
405

406 407
	if (new_sta_bw > sta->cur_max_bandwidth)
		new_sta_bw = sta->cur_max_bandwidth;
408

409 410 411 412 413
	if (new_sta_bw < sta->sta.bandwidth) {
		sta->sta.bandwidth = new_sta_bw;
		rate_control_rate_update(local, sband, sta,
					 IEEE80211_RC_BW_CHANGED);
	}
414

415 416 417 418 419 420 421
	ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
	if (ret) {
		sdata_info(sdata,
			   "AP %pM changed bandwidth to incompatible one - disconnect\n",
			   ifmgd->bssid);
		return ret;
	}
422

423 424 425 426
	if (new_sta_bw > sta->sta.bandwidth) {
		sta->sta.bandwidth = new_sta_bw;
		rate_control_rate_update(local, sband, sta,
					 IEEE80211_RC_BW_CHANGED);
427
	}
428

429
	return 0;
430 431
}

J
Johannes Berg 已提交
432 433
/* frame sending functions */

J
Johannes Berg 已提交
434
static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
435
				struct sk_buff *skb, u8 ap_ht_param,
J
Johannes Berg 已提交
436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452
				struct ieee80211_supported_band *sband,
				struct ieee80211_channel *channel,
				enum ieee80211_smps_mode smps)
{
	u8 *pos;
	u32 flags = channel->flags;
	u16 cap;
	struct ieee80211_sta_ht_cap ht_cap;

	BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));

	memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
	ieee80211_apply_htcap_overrides(sdata, &ht_cap);

	/* determine capability flags */
	cap = ht_cap.cap;

453
	switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
J
Johannes Berg 已提交
454 455 456 457 458 459 460 461 462 463 464 465 466 467
	case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
		if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
			cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
			cap &= ~IEEE80211_HT_CAP_SGI_40;
		}
		break;
	case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
		if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
			cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
			cap &= ~IEEE80211_HT_CAP_SGI_40;
		}
		break;
	}

468 469 470 471 472 473 474 475 476 477
	/*
	 * If 40 MHz was disabled associate as though we weren't
	 * capable of 40 MHz -- some broken APs will never fall
	 * back to trying to transmit in 20 MHz.
	 */
	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
		cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
		cap &= ~IEEE80211_HT_CAP_SGI_40;
	}

J
Johannes Berg 已提交
478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502
	/* set SM PS mode properly */
	cap &= ~IEEE80211_HT_CAP_SM_PS;
	switch (smps) {
	case IEEE80211_SMPS_AUTOMATIC:
	case IEEE80211_SMPS_NUM_MODES:
		WARN_ON(1);
	case IEEE80211_SMPS_OFF:
		cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
			IEEE80211_HT_CAP_SM_PS_SHIFT;
		break;
	case IEEE80211_SMPS_STATIC:
		cap |= WLAN_HT_CAP_SM_PS_STATIC <<
			IEEE80211_HT_CAP_SM_PS_SHIFT;
		break;
	case IEEE80211_SMPS_DYNAMIC:
		cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
			IEEE80211_HT_CAP_SM_PS_SHIFT;
		break;
	}

	/* reserve and fill IE */
	pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
	ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
}

503 504 505 506
/* This function determines vht capability flags for the association
 * and builds the IE.
 * Note - the function may set the owner of the MU-MIMO capability
 */
507 508
static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
				 struct sk_buff *skb,
509 510
				 struct ieee80211_supported_band *sband,
				 struct ieee80211_vht_cap *ap_vht_cap)
511
{
512
	struct ieee80211_local *local = sdata->local;
513 514 515
	u8 *pos;
	u32 cap;
	struct ieee80211_sta_vht_cap vht_cap;
516
	u32 mask, ap_bf_sts, our_bf_sts;
517 518 519 520

	BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));

	memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
521
	ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
522 523 524 525

	/* determine capability flags */
	cap = vht_cap.cap;

J
Johannes Berg 已提交
526
	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
527 528 529 530 531 532
		u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;

		cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
		if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
		    bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
			cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
J
Johannes Berg 已提交
533 534 535 536
	}

	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
		cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
537
		cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
J
Johannes Berg 已提交
538 539
	}

540 541 542 543 544 545
	/*
	 * Some APs apparently get confused if our capabilities are better
	 * than theirs, so restrict what we advertise in the assoc request.
	 */
	if (!(ap_vht_cap->vht_cap_info &
			cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563
		cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
			 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
	else if (!(ap_vht_cap->vht_cap_info &
			cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
		cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;

	/*
	 * If some other vif is using the MU-MIMO capablity we cannot associate
	 * using MU-MIMO - this will lead to contradictions in the group-id
	 * mechanism.
	 * Ownership is defined since association request, in order to avoid
	 * simultaneous associations with MU-MIMO.
	 */
	if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
		bool disable_mu_mimo = false;
		struct ieee80211_sub_if_data *other;

		list_for_each_entry_rcu(other, &local->interfaces, list) {
564
			if (other->vif.mu_mimo_owner) {
565 566 567 568 569 570 571
				disable_mu_mimo = true;
				break;
			}
		}
		if (disable_mu_mimo)
			cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
		else
572
			sdata->vif.mu_mimo_owner = true;
573
	}
574

575 576 577 578 579 580 581 582 583 584
	mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;

	ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
	our_bf_sts = cap & mask;

	if (ap_bf_sts < our_bf_sts) {
		cap &= ~mask;
		cap |= ap_bf_sts;
	}

585
	/* reserve and fill IE */
M
Mahesh Palivela 已提交
586
	pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
587 588 589
	ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
}

J
Johannes Berg 已提交
590 591 592 593 594 595 596 597 598
static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
	struct sk_buff *skb;
	struct ieee80211_mgmt *mgmt;
	u8 *pos, qos_info;
	size_t offset = 0, noffset;
599
	int i, count, rates_len, supp_rates_len, shift;
J
Johannes Berg 已提交
600 601
	u16 capab;
	struct ieee80211_supported_band *sband;
J
Johannes Berg 已提交
602 603
	struct ieee80211_chanctx_conf *chanctx_conf;
	struct ieee80211_channel *chan;
604
	u32 rates = 0;
J
Johannes Berg 已提交
605

606
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
607

J
Johannes Berg 已提交
608 609 610 611 612 613
	rcu_read_lock();
	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
	if (WARN_ON(!chanctx_conf)) {
		rcu_read_unlock();
		return;
	}
614
	chan = chanctx_conf->def.chan;
J
Johannes Berg 已提交
615 616
	rcu_read_unlock();
	sband = local->hw.wiphy->bands[chan->band];
617
	shift = ieee80211_vif_get_shift(&sdata->vif);
J
Johannes Berg 已提交
618 619 620 621 622 623 624 625

	if (assoc_data->supp_rates_len) {
		/*
		 * Get all rates supported by the device and the AP as
		 * some APs don't like getting a superset of their rates
		 * in the association request (e.g. D-Link DAP 1353 in
		 * b-only mode)...
		 */
626 627 628 629
		rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
						     assoc_data->supp_rates,
						     assoc_data->supp_rates_len,
						     &rates);
J
Johannes Berg 已提交
630 631 632 633 634 635
	} else {
		/*
		 * In case AP not provide any supported rates information
		 * before association, we send information element(s) with
		 * all rates that we support.
		 */
636 637 638 639 640
		rates_len = 0;
		for (i = 0; i < sband->n_bitrates; i++) {
			rates |= BIT(i);
			rates_len++;
		}
J
Johannes Berg 已提交
641 642 643 644 645 646 647 648 649
	}

	skb = alloc_skb(local->hw.extra_tx_headroom +
			sizeof(*mgmt) + /* bit too much but doesn't matter */
			2 + assoc_data->ssid_len + /* SSID */
			4 + rates_len + /* (extended) rates */
			4 + /* power capability */
			2 + 2 * sband->n_channels + /* supported channels */
			2 + sizeof(struct ieee80211_ht_cap) + /* HT */
M
Mahesh Palivela 已提交
650
			2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
J
Johannes Berg 已提交
651
			assoc_data->ie_len + /* extra IEs */
652
			(assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
J
Johannes Berg 已提交
653 654 655 656 657 658 659 660 661
			9, /* WMM */
			GFP_KERNEL);
	if (!skb)
		return;

	skb_reserve(skb, local->hw.extra_tx_headroom);

	capab = WLAN_CAPABILITY_ESS;

662
	if (sband->band == NL80211_BAND_2GHZ) {
663 664
		capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
		capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
J
Johannes Berg 已提交
665 666 667 668 669 670
	}

	if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
		capab |= WLAN_CAPABILITY_PRIVACY;

	if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
671
	    ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
J
Johannes Berg 已提交
672 673
		capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;

674 675 676
	if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
		capab |= WLAN_CAPABILITY_RADIO_MEASURE;

677
	mgmt = skb_put_zero(skb, 24);
J
Johannes Berg 已提交
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
	memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
	memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);

	if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
		skb_put(skb, 10);
		mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
						  IEEE80211_STYPE_REASSOC_REQ);
		mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
		mgmt->u.reassoc_req.listen_interval =
				cpu_to_le16(local->hw.conf.listen_interval);
		memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
		       ETH_ALEN);
	} else {
		skb_put(skb, 4);
		mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
						  IEEE80211_STYPE_ASSOC_REQ);
		mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
		mgmt->u.assoc_req.listen_interval =
				cpu_to_le16(local->hw.conf.listen_interval);
	}

	/* SSID */
	pos = skb_put(skb, 2 + assoc_data->ssid_len);
	*pos++ = WLAN_EID_SSID;
	*pos++ = assoc_data->ssid_len;
	memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);

	/* add all rates which were marked to be used above */
	supp_rates_len = rates_len;
	if (supp_rates_len > 8)
		supp_rates_len = 8;

	pos = skb_put(skb, supp_rates_len + 2);
	*pos++ = WLAN_EID_SUPP_RATES;
	*pos++ = supp_rates_len;

	count = 0;
	for (i = 0; i < sband->n_bitrates; i++) {
		if (BIT(i) & rates) {
718 719 720
			int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
						5 * (1 << shift));
			*pos++ = (u8) rate;
J
Johannes Berg 已提交
721 722 723 724 725 726 727 728 729 730 731 732
			if (++count == 8)
				break;
		}
	}

	if (rates_len > count) {
		pos = skb_put(skb, rates_len - count + 2);
		*pos++ = WLAN_EID_EXT_SUPP_RATES;
		*pos++ = rates_len - count;

		for (i++; i < sband->n_bitrates; i++) {
			if (BIT(i) & rates) {
733 734 735 736
				int rate;
				rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
						    5 * (1 << shift));
				*pos++ = (u8) rate;
J
Johannes Berg 已提交
737 738 739 740
			}
		}
	}

741 742
	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
	    capab & WLAN_CAPABILITY_RADIO_MEASURE) {
J
Johannes Berg 已提交
743 744 745 746
		pos = skb_put(skb, 4);
		*pos++ = WLAN_EID_PWR_CAPABILITY;
		*pos++ = 2;
		*pos++ = 0; /* min tx power */
747 748
		 /* max tx power */
		*pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
749
	}
J
Johannes Berg 已提交
750

751
	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
J
Johannes Berg 已提交
752 753 754 755 756 757 758 759 760 761 762 763
		/* TODO: get this in reg domain format */
		pos = skb_put(skb, 2 * sband->n_channels + 2);
		*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
		*pos++ = 2 * sband->n_channels;
		for (i = 0; i < sband->n_channels; i++) {
			*pos++ = ieee80211_frequency_to_channel(
					sband->channels[i].center_freq);
			*pos++ = 1; /* one channel in the subband*/
		}
	}

	/* if present, add any custom IEs that go before HT */
764
	if (assoc_data->ie_len) {
J
Johannes Berg 已提交
765 766 767 768 769 770 771 772 773 774
		static const u8 before_ht[] = {
			WLAN_EID_SSID,
			WLAN_EID_SUPP_RATES,
			WLAN_EID_EXT_SUPP_RATES,
			WLAN_EID_PWR_CAPABILITY,
			WLAN_EID_SUPPORTED_CHANNELS,
			WLAN_EID_RSN,
			WLAN_EID_QOS_CAPA,
			WLAN_EID_RRM_ENABLED_CAPABILITIES,
			WLAN_EID_MOBILITY_DOMAIN,
775 776
			WLAN_EID_FAST_BSS_TRANSITION,	/* reassoc only */
			WLAN_EID_RIC_DATA,		/* reassoc only */
J
Johannes Berg 已提交
777 778
			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
		};
779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798
		static const u8 after_ric[] = {
			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
			WLAN_EID_HT_CAPABILITY,
			WLAN_EID_BSS_COEX_2040,
			WLAN_EID_EXT_CAPABILITY,
			WLAN_EID_QOS_TRAFFIC_CAPA,
			WLAN_EID_TIM_BCAST_REQ,
			WLAN_EID_INTERWORKING,
			/* 60GHz doesn't happen right now */
			WLAN_EID_VHT_CAPABILITY,
			WLAN_EID_OPMODE_NOTIF,
		};

		noffset = ieee80211_ie_split_ric(assoc_data->ie,
						 assoc_data->ie_len,
						 before_ht,
						 ARRAY_SIZE(before_ht),
						 after_ric,
						 ARRAY_SIZE(after_ric),
						 offset);
799
		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
J
Johannes Berg 已提交
800 801 802
		offset = noffset;
	}

J
Johannes Berg 已提交
803 804 805 806
	if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
			 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;

807
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
808
		ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
809
				    sband, chan, sdata->smps_mode);
J
Johannes Berg 已提交
810

811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830
	/* if present, add any custom IEs that go before VHT */
	if (assoc_data->ie_len) {
		static const u8 before_vht[] = {
			WLAN_EID_SSID,
			WLAN_EID_SUPP_RATES,
			WLAN_EID_EXT_SUPP_RATES,
			WLAN_EID_PWR_CAPABILITY,
			WLAN_EID_SUPPORTED_CHANNELS,
			WLAN_EID_RSN,
			WLAN_EID_QOS_CAPA,
			WLAN_EID_RRM_ENABLED_CAPABILITIES,
			WLAN_EID_MOBILITY_DOMAIN,
			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
			WLAN_EID_HT_CAPABILITY,
			WLAN_EID_BSS_COEX_2040,
			WLAN_EID_EXT_CAPABILITY,
			WLAN_EID_QOS_TRAFFIC_CAPA,
			WLAN_EID_TIM_BCAST_REQ,
			WLAN_EID_INTERWORKING,
		};
831 832

		/* RIC already taken above, so no need to handle here anymore */
833 834 835
		noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
					     before_vht, ARRAY_SIZE(before_vht),
					     offset);
836
		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
837 838 839
		offset = noffset;
	}

840
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
841 842
		ieee80211_add_vht_ie(sdata, skb, sband,
				     &assoc_data->ap_vht_cap);
843

J
Johannes Berg 已提交
844
	/* if present, add any custom non-vendor IEs that go after HT */
845
	if (assoc_data->ie_len) {
J
Johannes Berg 已提交
846 847 848
		noffset = ieee80211_ie_split_vendor(assoc_data->ie,
						    assoc_data->ie_len,
						    offset);
849
		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
J
Johannes Berg 已提交
850 851 852
		offset = noffset;
	}

853 854
	if (assoc_data->wmm) {
		if (assoc_data->uapsd) {
855 856
			qos_info = ifmgd->uapsd_queues;
			qos_info |= (ifmgd->uapsd_max_sp_len <<
J
Johannes Berg 已提交
857 858 859 860 861
				     IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
		} else {
			qos_info = 0;
		}

862
		pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
J
Johannes Berg 已提交
863 864 865
	}

	/* add any remaining custom (i.e. vendor specific here) IEs */
866
	if (assoc_data->ie_len) {
J
Johannes Berg 已提交
867
		noffset = assoc_data->ie_len;
868
		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
J
Johannes Berg 已提交
869 870
	}

871 872 873 874 875 876
	if (assoc_data->fils_kek_len &&
	    fils_encrypt_assoc_req(skb, assoc_data) < 0) {
		dev_kfree_skb(skb);
		return;
	}

J
Johannes Berg 已提交
877 878
	drv_mgd_prepare_tx(local, sdata);

J
Johannes Berg 已提交
879
	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
880
	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
881 882
		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
						IEEE80211_TX_INTFL_MLME_CONN_TX;
J
Johannes Berg 已提交
883 884 885
	ieee80211_tx_skb(sdata, skb);
}

886 887 888 889 890 891
void ieee80211_send_pspoll(struct ieee80211_local *local,
			   struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_pspoll *pspoll;
	struct sk_buff *skb;

892 893
	skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
	if (!skb)
894 895
		return;

896 897
	pspoll = (struct ieee80211_pspoll *) skb->data;
	pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
898

899 900
	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
	ieee80211_tx_skb(sdata, skb);
901 902
}

903 904
void ieee80211_send_nullfunc(struct ieee80211_local *local,
			     struct ieee80211_sub_if_data *sdata,
905
			     bool powersave)
906 907
{
	struct sk_buff *skb;
908
	struct ieee80211_hdr_3addr *nullfunc;
909
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
910

911 912
	skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
	if (!skb)
913 914
		return;

915
	nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
916
	if (powersave)
917
		nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
918

919 920
	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
					IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
921

922
	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
923 924
		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;

925
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
926 927
		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;

928
	ieee80211_tx_skb(sdata, skb);
929 930
}

931 932 933 934 935 936 937 938 939 940 941
static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
					  struct ieee80211_sub_if_data *sdata)
{
	struct sk_buff *skb;
	struct ieee80211_hdr *nullfunc;
	__le16 fc;

	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
		return;

	skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
942
	if (!skb)
943
		return;
944

945 946
	skb_reserve(skb, local->hw.extra_tx_headroom);

947
	nullfunc = skb_put_zero(skb, 30);
948 949 950 951 952 953 954 955 956 957 958 959
	fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
			 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
	nullfunc->frame_control = fc;
	memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
	memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
	memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
	memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);

	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
	ieee80211_tx_skb(sdata, skb);
}

960 961 962 963 964
/* spectrum management related things */
static void ieee80211_chswitch_work(struct work_struct *work)
{
	struct ieee80211_sub_if_data *sdata =
		container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
965
	struct ieee80211_local *local = sdata->local;
966
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
967
	int ret;
968

969
	if (!ieee80211_sdata_running(sdata))
970 971
		return;

972
	sdata_lock(sdata);
973 974 975
	mutex_lock(&local->mtx);
	mutex_lock(&local->chanctx_mtx);

976 977
	if (!ifmgd->associated)
		goto out;
978

979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012
	if (!sdata->vif.csa_active)
		goto out;

	/*
	 * using reservation isn't immediate as it may be deferred until later
	 * with multi-vif. once reservation is complete it will re-schedule the
	 * work with no reserved_chanctx so verify chandef to check if it
	 * completed successfully
	 */

	if (sdata->reserved_chanctx) {
		/*
		 * with multi-vif csa driver may call ieee80211_csa_finish()
		 * many times while waiting for other interfaces to use their
		 * reservations
		 */
		if (sdata->reserved_ready)
			goto out;

		ret = ieee80211_vif_use_reserved_context(sdata);
		if (ret) {
			sdata_info(sdata,
				   "failed to use reserved channel context, disconnecting (err=%d)\n",
				   ret);
			ieee80211_queue_work(&sdata->local->hw,
					     &ifmgd->csa_connection_drop_work);
			goto out;
		}

		goto out;
	}

	if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
					&sdata->csa_chandef)) {
1013
		sdata_info(sdata,
1014
			   "failed to finalize channel switch, disconnecting\n");
1015 1016 1017 1018
		ieee80211_queue_work(&sdata->local->hw,
				     &ifmgd->csa_connection_drop_work);
		goto out;
	}
1019

1020
	/* XXX: shouldn't really modify cfg80211-owned data! */
1021
	ifmgd->associated->channel = sdata->csa_chandef.chan;
1022

1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042
	ifmgd->csa_waiting_bcn = true;

	ieee80211_sta_reset_beacon_monitor(sdata);
	ieee80211_sta_reset_conn_monitor(sdata);

out:
	mutex_unlock(&local->chanctx_mtx);
	mutex_unlock(&local->mtx);
	sdata_unlock(sdata);
}

static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	int ret;

	sdata_assert_lock(sdata);

	WARN_ON(!sdata->vif.csa_active);
1043

1044 1045 1046 1047 1048
	if (sdata->csa_block_tx) {
		ieee80211_wake_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
		sdata->csa_block_tx = false;
	}
1049

1050 1051 1052
	sdata->vif.csa_active = false;
	ifmgd->csa_waiting_bcn = false;

1053 1054 1055 1056 1057 1058
	ret = drv_post_channel_switch(sdata);
	if (ret) {
		sdata_info(sdata,
			   "driver post channel switch failed, disconnecting\n");
		ieee80211_queue_work(&local->hw,
				     &ifmgd->csa_connection_drop_work);
1059
		return;
1060
	}
1061 1062

	cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1063 1064
}

1065 1066
void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
{
J
Johannes Berg 已提交
1067 1068
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1069 1070 1071

	trace_api_chswitch_done(sdata, success);
	if (!success) {
1072 1073 1074 1075 1076 1077
		sdata_info(sdata,
			   "driver channel switch failed, disconnecting\n");
		ieee80211_queue_work(&sdata->local->hw,
				     &ifmgd->csa_connection_drop_work);
	} else {
		ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1078 1079 1080 1081
	}
}
EXPORT_SYMBOL(ieee80211_chswitch_done);

1082 1083 1084 1085
static void ieee80211_chswitch_timer(unsigned long data)
{
	struct ieee80211_sub_if_data *sdata =
		(struct ieee80211_sub_if_data *) data;
1086

1087
	ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1088 1089
}

1090
static void
J
Johannes Berg 已提交
1091
ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1092 1093
				 u64 timestamp, u32 device_timestamp,
				 struct ieee802_11_elems *elems,
1094
				 bool beacon)
1095
{
1096
	struct ieee80211_local *local = sdata->local;
1097
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1098
	struct cfg80211_bss *cbss = ifmgd->associated;
1099
	struct ieee80211_chanctx_conf *conf;
J
Johannes Berg 已提交
1100
	struct ieee80211_chanctx *chanctx;
1101
	enum nl80211_band current_band;
1102
	struct ieee80211_csa_ie csa_ie;
1103
	struct ieee80211_channel_switch ch_switch;
1104
	int res;
1105

1106
	sdata_assert_lock(sdata);
1107

1108
	if (!cbss)
1109 1110
		return;

1111
	if (local->scanning)
1112 1113
		return;

1114
	/* disregard subsequent announcements if we are already processing */
1115
	if (sdata->vif.csa_active)
1116 1117
		return;

1118
	current_band = cbss->channel->band;
1119
	res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1120
					   ifmgd->flags,
1121
					   ifmgd->associated->bssid, &csa_ie);
1122
	if (res	< 0)
1123
		ieee80211_queue_work(&local->hw,
1124
				     &ifmgd->csa_connection_drop_work);
1125
	if (res)
1126
		return;
1127

1128
	if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1129 1130 1131
				     IEEE80211_CHAN_DISABLED)) {
		sdata_info(sdata,
			   "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1132
			   ifmgd->associated->bssid,
1133 1134 1135
			   csa_ie.chandef.chan->center_freq,
			   csa_ie.chandef.width, csa_ie.chandef.center_freq1,
			   csa_ie.chandef.center_freq2);
1136 1137 1138 1139 1140
		ieee80211_queue_work(&local->hw,
				     &ifmgd->csa_connection_drop_work);
		return;
	}

1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151
	if (cfg80211_chandef_identical(&csa_ie.chandef,
				       &sdata->vif.bss_conf.chandef)) {
		if (ifmgd->csa_ignored_same_chan)
			return;
		sdata_info(sdata,
			   "AP %pM tries to chanswitch to same channel, ignore\n",
			   ifmgd->associated->bssid);
		ifmgd->csa_ignored_same_chan = true;
		return;
	}

1152 1153 1154 1155 1156 1157 1158 1159
	/*
	 * Drop all TDLS peers - either we disconnect or move to a different
	 * channel from this point on. There's no telling what our peer will do.
	 * The TDLS WIDER_BW scenario is also problematic, as peers might now
	 * have an incompatible wider chandef.
	 */
	ieee80211_teardown_tdls_peers(sdata);

1160
	mutex_lock(&local->mtx);
1161
	mutex_lock(&local->chanctx_mtx);
1162 1163 1164 1165 1166
	conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
					 lockdep_is_held(&local->chanctx_mtx));
	if (!conf) {
		sdata_info(sdata,
			   "no channel context assigned to vif?, disconnecting\n");
1167
		goto drop_connection;
1168 1169 1170 1171
	}

	chanctx = container_of(conf, struct ieee80211_chanctx, conf);

1172
	if (local->use_chanctx &&
1173
	    !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1174 1175
		sdata_info(sdata,
			   "driver doesn't support chan-switch with channel contexts\n");
1176
		goto drop_connection;
J
Johannes Berg 已提交
1177 1178
	}

1179 1180 1181 1182 1183 1184 1185 1186 1187
	ch_switch.timestamp = timestamp;
	ch_switch.device_timestamp = device_timestamp;
	ch_switch.block_tx = csa_ie.mode;
	ch_switch.chandef = csa_ie.chandef;
	ch_switch.count = csa_ie.count;

	if (drv_pre_channel_switch(sdata, &ch_switch)) {
		sdata_info(sdata,
			   "preparing for channel switch failed, disconnecting\n");
1188
		goto drop_connection;
1189 1190
	}

1191 1192 1193
	res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
					    chanctx->mode, false);
	if (res) {
J
Johannes Berg 已提交
1194
		sdata_info(sdata,
1195 1196
			   "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
			   res);
1197
		goto drop_connection;
J
Johannes Berg 已提交
1198
	}
1199
	mutex_unlock(&local->chanctx_mtx);
J
Johannes Berg 已提交
1200

1201
	sdata->vif.csa_active = true;
1202
	sdata->csa_chandef = csa_ie.chandef;
1203
	sdata->csa_block_tx = csa_ie.mode;
1204
	ifmgd->csa_ignored_same_chan = false;
J
Johannes Berg 已提交
1205

1206
	if (sdata->csa_block_tx)
1207 1208
		ieee80211_stop_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
1209
	mutex_unlock(&local->mtx);
1210

1211 1212 1213
	cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
					  csa_ie.count);

1214
	if (local->ops->channel_switch) {
1215
		/* use driver's channel switch callback */
1216
		drv_channel_switch(local, sdata, &ch_switch);
1217 1218 1219 1220
		return;
	}

	/* channel switch handled in software */
1221
	if (csa_ie.count <= 1)
1222
		ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1223
	else
1224
		mod_timer(&ifmgd->chswitch_timer,
1225 1226
			  TU_TO_EXP_TIME((csa_ie.count - 1) *
					 cbss->beacon_interval));
1227 1228 1229 1230 1231
	return;
 drop_connection:
	ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
	mutex_unlock(&local->chanctx_mtx);
	mutex_unlock(&local->mtx);
1232 1233
}

1234 1235 1236 1237 1238 1239
static bool
ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
				 struct ieee80211_channel *channel,
				 const u8 *country_ie, u8 country_ie_len,
				 const u8 *pwr_constr_elem,
				 int *chan_pwr, int *pwr_reduction)
1240
{
1241 1242
	struct ieee80211_country_ie_triplet *triplet;
	int chan = ieee80211_frequency_to_channel(channel->center_freq);
1243
	int i, chan_increment;
1244
	bool have_chan_pwr = false;
1245

1246 1247
	/* Invalid IE */
	if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1248
		return false;
1249

1250 1251 1252 1253 1254 1255 1256
	triplet = (void *)(country_ie + 3);
	country_ie_len -= 3;

	switch (channel->band) {
	default:
		WARN_ON_ONCE(1);
		/* fall through */
1257 1258
	case NL80211_BAND_2GHZ:
	case NL80211_BAND_60GHZ:
1259 1260
		chan_increment = 1;
		break;
1261
	case NL80211_BAND_5GHZ:
1262 1263
		chan_increment = 4;
		break;
1264
	}
1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275

	/* find channel */
	while (country_ie_len >= 3) {
		u8 first_channel = triplet->chans.first_channel;

		if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
			goto next;

		for (i = 0; i < triplet->chans.num_channels; i++) {
			if (first_channel + i * chan_increment == chan) {
				have_chan_pwr = true;
1276
				*chan_pwr = triplet->chans.max_power;
1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287
				break;
			}
		}
		if (have_chan_pwr)
			break;

 next:
		triplet++;
		country_ie_len -= 3;
	}

1288
	if (have_chan_pwr && pwr_constr_elem)
1289
		*pwr_reduction = *pwr_constr_elem;
1290 1291 1292
	else
		*pwr_reduction = 0;

1293 1294 1295
	return have_chan_pwr;
}

1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309
static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
				      struct ieee80211_channel *channel,
				      const u8 *cisco_dtpc_ie,
				      int *pwr_level)
{
	/* From practical testing, the first data byte of the DTPC element
	 * seems to contain the requested dBm level, and the CLI on Cisco
	 * APs clearly state the range is -127 to 127 dBm, which indicates
	 * a signed byte, although it seemingly never actually goes negative.
	 * The other byte seems to always be zero.
	 */
	*pwr_level = (__s8)cisco_dtpc_ie[4];
}

1310 1311 1312 1313
static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
				       struct ieee80211_channel *channel,
				       struct ieee80211_mgmt *mgmt,
				       const u8 *country_ie, u8 country_ie_len,
1314 1315
				       const u8 *pwr_constr_ie,
				       const u8 *cisco_dtpc_ie)
1316
{
1317 1318 1319
	bool has_80211h_pwr = false, has_cisco_pwr = false;
	int chan_pwr = 0, pwr_reduction_80211h = 0;
	int pwr_level_cisco, pwr_level_80211h;
1320
	int new_ap_level;
1321
	__le16 capab = mgmt->u.probe_resp.capab_info;
1322

1323 1324 1325
	if (country_ie &&
	    (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
	     capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1326 1327 1328
		has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
			sdata, channel, country_ie, country_ie_len,
			pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1329 1330 1331 1332 1333 1334 1335 1336
		pwr_level_80211h =
			max_t(int, 0, chan_pwr - pwr_reduction_80211h);
	}

	if (cisco_dtpc_ie) {
		ieee80211_find_cisco_dtpc(
			sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
		has_cisco_pwr = true;
1337
	}
1338

1339
	if (!has_80211h_pwr && !has_cisco_pwr)
1340
		return 0;
1341

1342 1343 1344 1345 1346
	/* If we have both 802.11h and Cisco DTPC, apply both limits
	 * by picking the smallest of the two power levels advertised.
	 */
	if (has_80211h_pwr &&
	    (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1347 1348 1349 1350 1351
		new_ap_level = pwr_level_80211h;

		if (sdata->ap_power_level == new_ap_level)
			return 0;

1352 1353 1354 1355
		sdata_dbg(sdata,
			  "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
			  pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
			  sdata->u.mgd.bssid);
1356
	} else {  /* has_cisco_pwr is always true here. */
1357 1358 1359 1360 1361
		new_ap_level = pwr_level_cisco;

		if (sdata->ap_power_level == new_ap_level)
			return 0;

1362 1363 1364
		sdata_dbg(sdata,
			  "Limiting TX power to %d dBm as advertised by %pM\n",
			  pwr_level_cisco, sdata->u.mgd.bssid);
1365
	}
1366

1367 1368 1369 1370
	sdata->ap_power_level = new_ap_level;
	if (__ieee80211_recalc_txpower(sdata))
		return BSS_CHANGED_TXPOWER;
	return 0;
1371 1372
}

1373 1374 1375 1376 1377 1378
/* powersave */
static void ieee80211_enable_ps(struct ieee80211_local *local,
				struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_conf *conf = &local->hw.conf;

J
Johannes Berg 已提交
1379 1380 1381 1382
	/*
	 * If we are scanning right now then the parameters will
	 * take effect when scan finishes.
	 */
1383
	if (local->scanning)
J
Johannes Berg 已提交
1384 1385
		return;

1386
	if (conf->dynamic_ps_timeout > 0 &&
1387
	    !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1388 1389 1390
		mod_timer(&local->dynamic_ps_timer, jiffies +
			  msecs_to_jiffies(conf->dynamic_ps_timeout));
	} else {
1391
		if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1392
			ieee80211_send_nullfunc(local, sdata, true);
1393

1394 1395
		if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
		    ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1396 1397 1398 1399
			return;

		conf->flags |= IEEE80211_CONF_PS;
		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416
	}
}

static void ieee80211_change_ps(struct ieee80211_local *local)
{
	struct ieee80211_conf *conf = &local->hw.conf;

	if (local->ps_sdata) {
		ieee80211_enable_ps(local, local->ps_sdata);
	} else if (conf->flags & IEEE80211_CONF_PS) {
		conf->flags &= ~IEEE80211_CONF_PS;
		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
		del_timer_sync(&local->dynamic_ps_timer);
		cancel_work_sync(&local->dynamic_ps_enable_work);
	}
}

1417 1418 1419 1420
static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_managed *mgd = &sdata->u.mgd;
	struct sta_info *sta = NULL;
J
Johannes Berg 已提交
1421
	bool authorized = false;
1422 1423 1424 1425

	if (!mgd->powersave)
		return false;

1426 1427 1428
	if (mgd->broken_ap)
		return false;

1429 1430 1431
	if (!mgd->associated)
		return false;

1432
	if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1433 1434
		return false;

1435
	if (!mgd->have_beacon)
1436 1437
		return false;

1438 1439 1440
	rcu_read_lock();
	sta = sta_info_get(sdata, mgd->bssid);
	if (sta)
J
Johannes Berg 已提交
1441
		authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1442 1443
	rcu_read_unlock();

J
Johannes Berg 已提交
1444
	return authorized;
1445 1446
}

1447
/* need to hold RTNL or interface lock */
J
Johannes Berg 已提交
1448
void ieee80211_recalc_ps(struct ieee80211_local *local)
1449 1450 1451
{
	struct ieee80211_sub_if_data *sdata, *found = NULL;
	int count = 0;
1452
	int timeout;
1453

1454
	if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1455 1456 1457 1458 1459
		local->ps_sdata = NULL;
		return;
	}

	list_for_each_entry(sdata, &local->interfaces, list) {
1460
		if (!ieee80211_sdata_running(sdata))
1461
			continue;
1462 1463 1464 1465 1466 1467 1468 1469
		if (sdata->vif.type == NL80211_IFTYPE_AP) {
			/* If an AP vif is found, then disable PS
			 * by setting the count to zero thereby setting
			 * ps_sdata to NULL.
			 */
			count = 0;
			break;
		}
1470 1471 1472 1473 1474 1475
		if (sdata->vif.type != NL80211_IFTYPE_STATION)
			continue;
		found = sdata;
		count++;
	}

1476
	if (count == 1 && ieee80211_powersave_allowed(found)) {
J
Johannes Berg 已提交
1477
		u8 dtimper = found->u.mgd.dtim_period;
1478

1479
		timeout = local->dynamic_ps_forced_timeout;
J
Johannes Berg 已提交
1480 1481
		if (timeout < 0)
			timeout = 100;
1482
		local->hw.conf.dynamic_ps_timeout = timeout;
1483

J
Johannes Berg 已提交
1484 1485 1486 1487 1488 1489
		/* If the TIM IE is invalid, pretend the value is 1 */
		if (!dtimper)
			dtimper = 1;

		local->hw.conf.ps_dtim_period = dtimper;
		local->ps_sdata = found;
1490
	} else {
1491
		local->ps_sdata = NULL;
1492
	}
1493 1494 1495 1496

	ieee80211_change_ps(local);
}

E
Eliad Peller 已提交
1497 1498 1499 1500 1501 1502 1503 1504 1505 1506
void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
{
	bool ps_allowed = ieee80211_powersave_allowed(sdata);

	if (sdata->vif.bss_conf.ps != ps_allowed) {
		sdata->vif.bss_conf.ps = ps_allowed;
		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
	}
}

1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518
void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
{
	struct ieee80211_local *local =
		container_of(work, struct ieee80211_local,
			     dynamic_ps_disable_work);

	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
		local->hw.conf.flags &= ~IEEE80211_CONF_PS;
		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
	}

	ieee80211_wake_queues_by_reason(&local->hw,
1519
					IEEE80211_MAX_QUEUE_MAP,
1520 1521
					IEEE80211_QUEUE_STOP_REASON_PS,
					false);
1522 1523 1524 1525 1526 1527 1528 1529
}

void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
{
	struct ieee80211_local *local =
		container_of(work, struct ieee80211_local,
			     dynamic_ps_enable_work);
	struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1530
	struct ieee80211_if_managed *ifmgd;
1531 1532
	unsigned long flags;
	int q;
1533 1534 1535 1536 1537

	/* can only happen when PS was just disabled anyway */
	if (!sdata)
		return;

1538 1539
	ifmgd = &sdata->u.mgd;

1540 1541 1542
	if (local->hw.conf.flags & IEEE80211_CONF_PS)
		return;

1543
	if (local->hw.conf.dynamic_ps_timeout > 0) {
1544 1545
		/* don't enter PS if TX frames are pending */
		if (drv_tx_frames_pending(local)) {
1546 1547 1548 1549 1550
			mod_timer(&local->dynamic_ps_timer, jiffies +
				  msecs_to_jiffies(
				  local->hw.conf.dynamic_ps_timeout));
			return;
		}
1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568

		/*
		 * transmission can be stopped by others which leads to
		 * dynamic_ps_timer expiry. Postpone the ps timer if it
		 * is not the actual idle state.
		 */
		spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
		for (q = 0; q < local->hw.queues; q++) {
			if (local->queue_stop_reasons[q]) {
				spin_unlock_irqrestore(&local->queue_stop_reason_lock,
						       flags);
				mod_timer(&local->dynamic_ps_timer, jiffies +
					  msecs_to_jiffies(
					  local->hw.conf.dynamic_ps_timeout));
				return;
			}
		}
		spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1569 1570
	}

1571
	if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1572
	    !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1573
		if (drv_tx_frames_pending(local)) {
1574 1575 1576
			mod_timer(&local->dynamic_ps_timer, jiffies +
				  msecs_to_jiffies(
				  local->hw.conf.dynamic_ps_timeout));
1577
		} else {
1578
			ieee80211_send_nullfunc(local, sdata, true);
1579
			/* Flush to get the tx status of nullfunc frame */
1580
			ieee80211_flush_queues(local, sdata, false);
1581
		}
1582 1583
	}

1584 1585
	if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
	      ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1586 1587 1588 1589 1590
	    (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
		ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
		local->hw.conf.flags |= IEEE80211_CONF_PS;
		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
	}
1591 1592 1593 1594 1595 1596
}

void ieee80211_dynamic_ps_timer(unsigned long data)
{
	struct ieee80211_local *local = (void *) data;

1597
	ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1598 1599
}

1600 1601
void ieee80211_dfs_cac_timer_work(struct work_struct *work)
{
1602
	struct delayed_work *delayed_work = to_delayed_work(work);
1603 1604 1605
	struct ieee80211_sub_if_data *sdata =
		container_of(delayed_work, struct ieee80211_sub_if_data,
			     dfs_cac_timer_work);
1606
	struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1607

1608 1609 1610 1611 1612 1613 1614 1615
	mutex_lock(&sdata->local->mtx);
	if (sdata->wdev.cac_started) {
		ieee80211_vif_release_channel(sdata);
		cfg80211_cac_event(sdata->dev, &chandef,
				   NL80211_RADAR_CAC_FINISHED,
				   GFP_KERNEL);
	}
	mutex_unlock(&sdata->local->mtx);
1616 1617
}

1618 1619 1620 1621 1622
static bool
__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1623
	bool ret = false;
1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667
	int ac;

	if (local->hw.queues < IEEE80211_NUM_ACS)
		return false;

	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
		struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
		int non_acm_ac;
		unsigned long now = jiffies;

		if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
		    tx_tspec->admitted_time &&
		    time_after(now, tx_tspec->time_slice_start + HZ)) {
			tx_tspec->consumed_tx_time = 0;
			tx_tspec->time_slice_start = now;

			if (tx_tspec->downgraded)
				tx_tspec->action =
					TX_TSPEC_ACTION_STOP_DOWNGRADE;
		}

		switch (tx_tspec->action) {
		case TX_TSPEC_ACTION_STOP_DOWNGRADE:
			/* take the original parameters */
			if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
				sdata_err(sdata,
					  "failed to set TX queue parameters for queue %d\n",
					  ac);
			tx_tspec->action = TX_TSPEC_ACTION_NONE;
			tx_tspec->downgraded = false;
			ret = true;
			break;
		case TX_TSPEC_ACTION_DOWNGRADE:
			if (time_after(now, tx_tspec->time_slice_start + HZ)) {
				tx_tspec->action = TX_TSPEC_ACTION_NONE;
				ret = true;
				break;
			}
			/* downgrade next lower non-ACM AC */
			for (non_acm_ac = ac + 1;
			     non_acm_ac < IEEE80211_NUM_ACS;
			     non_acm_ac++)
				if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
					break;
1668 1669 1670 1671 1672 1673
			/* Usually the loop will result in using BK even if it
			 * requires admission control, but such a configuration
			 * makes no sense and we have to transmit somehow - the
			 * AC selection does the same thing.
			 * If we started out trying to downgrade from BK, then
			 * the extra condition here might be needed.
1674
			 */
1675 1676
			if (non_acm_ac >= IEEE80211_NUM_ACS)
				non_acm_ac = IEEE80211_AC_BK;
1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710
			if (drv_conf_tx(local, sdata, ac,
					&sdata->tx_conf[non_acm_ac]))
				sdata_err(sdata,
					  "failed to set TX queue parameters for queue %d\n",
					  ac);
			tx_tspec->action = TX_TSPEC_ACTION_NONE;
			ret = true;
			schedule_delayed_work(&ifmgd->tx_tspec_wk,
				tx_tspec->time_slice_start + HZ - now + 1);
			break;
		case TX_TSPEC_ACTION_NONE:
			/* nothing now */
			break;
		}
	}

	return ret;
}

void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
{
	if (__ieee80211_sta_handle_tspec_ac_params(sdata))
		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
}

static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
{
	struct ieee80211_sub_if_data *sdata;

	sdata = container_of(work, struct ieee80211_sub_if_data,
			     u.mgd.tx_tspec_wk.work);
	ieee80211_sta_handle_tspec_ac_params(sdata);
}

J
Johannes Berg 已提交
1711
/* MLME */
1712
static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1713
				     struct ieee80211_sub_if_data *sdata,
J
Johannes Berg 已提交
1714
				     const u8 *wmm_param, size_t wmm_param_len)
1715
{
1716
	struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1717
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1718
	size_t left;
1719
	int count, ac;
J
Johannes Berg 已提交
1720 1721
	const u8 *pos;
	u8 uapsd_queues = 0;
1722

1723
	if (!local->ops->conf_tx)
1724
		return false;
1725

J
Johannes Berg 已提交
1726
	if (local->hw.queues < IEEE80211_NUM_ACS)
1727
		return false;
1728 1729

	if (!wmm_param)
1730
		return false;
1731

1732
	if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1733
		return false;
K
Kalle Valo 已提交
1734 1735

	if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1736
		uapsd_queues = ifmgd->uapsd_queues;
K
Kalle Valo 已提交
1737

1738
	count = wmm_param[6] & 0x0f;
1739
	if (count == ifmgd->wmm_last_param_set)
1740
		return false;
1741
	ifmgd->wmm_last_param_set = count;
1742 1743 1744 1745 1746 1747

	pos = wmm_param + 8;
	left = wmm_param_len - 8;

	memset(&params, 0, sizeof(params));

Y
Yoni Divinsky 已提交
1748
	sdata->wmm_acm = 0;
1749 1750 1751
	for (; left >= 4; left -= 4, pos += 4) {
		int aci = (pos[0] >> 5) & 0x03;
		int acm = (pos[0] >> 4) & 0x01;
K
Kalle Valo 已提交
1752
		bool uapsd = false;
1753 1754

		switch (aci) {
1755
		case 1: /* AC_BK */
1756
			ac = IEEE80211_AC_BK;
J
Johannes Berg 已提交
1757
			if (acm)
Y
Yoni Divinsky 已提交
1758
				sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
K
Kalle Valo 已提交
1759 1760
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
				uapsd = true;
1761
			break;
1762
		case 2: /* AC_VI */
1763
			ac = IEEE80211_AC_VI;
J
Johannes Berg 已提交
1764
			if (acm)
Y
Yoni Divinsky 已提交
1765
				sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
K
Kalle Valo 已提交
1766 1767
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
				uapsd = true;
1768
			break;
1769
		case 3: /* AC_VO */
1770
			ac = IEEE80211_AC_VO;
J
Johannes Berg 已提交
1771
			if (acm)
Y
Yoni Divinsky 已提交
1772
				sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
K
Kalle Valo 已提交
1773 1774
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
				uapsd = true;
1775
			break;
1776
		case 0: /* AC_BE */
1777
		default:
1778
			ac = IEEE80211_AC_BE;
J
Johannes Berg 已提交
1779
			if (acm)
Y
Yoni Divinsky 已提交
1780
				sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
K
Kalle Valo 已提交
1781 1782
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
				uapsd = true;
1783 1784 1785
			break;
		}

1786
		params[ac].aifs = pos[0] & 0x0f;
1787

1788
		if (params[ac].aifs < 2) {
1789 1790
			sdata_info(sdata,
				   "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1791 1792
				   params[ac].aifs, aci);
			params[ac].aifs = 2;
1793
		}
1794 1795 1796 1797 1798
		params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
		params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
		params[ac].txop = get_unaligned_le16(pos + 2);
		params[ac].acm = acm;
		params[ac].uapsd = uapsd;
K
Kalle Valo 已提交
1799

1800 1801 1802 1803 1804 1805 1806 1807 1808
		if (params[ac].cw_min > params[ac].cw_max) {
			sdata_info(sdata,
				   "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
				   params[ac].cw_min, params[ac].cw_max, aci);
			return false;
		}
	}

	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
J
Johannes Berg 已提交
1809
		mlme_dbg(sdata,
1810 1811 1812 1813 1814 1815 1816 1817
			 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
			 ac, params[ac].acm,
			 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
			 params[ac].txop, params[ac].uapsd,
			 ifmgd->tx_tspec[ac].downgraded);
		sdata->tx_conf[ac] = params[ac];
		if (!ifmgd->tx_tspec[ac].downgraded &&
		    drv_conf_tx(local, sdata, ac, &params[ac]))
J
Johannes Berg 已提交
1818
			sdata_err(sdata,
1819 1820
				  "failed to set TX queue parameters for AC %d\n",
				  ac);
1821
	}
1822 1823

	/* enable WMM or activate new settings */
1824
	sdata->vif.bss_conf.qos = true;
1825
	return true;
1826 1827
}

1828 1829 1830 1831
static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
{
	lockdep_assert_held(&sdata->local->mtx);

1832
	sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1833 1834 1835 1836 1837 1838 1839 1840 1841 1842
	ieee80211_run_deferred_scan(sdata->local);
}

static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
{
	mutex_lock(&sdata->local->mtx);
	__ieee80211_stop_poll(sdata);
	mutex_unlock(&sdata->local->mtx);
}

J
Johannes Berg 已提交
1843 1844
static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
					   u16 capab, bool erp_valid, u8 erp)
1845
{
J
Johannes Berg 已提交
1846
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1847
	struct ieee80211_supported_band *sband;
1848
	u32 changed = 0;
J
Johannes Berg 已提交
1849 1850 1851 1852
	bool use_protection;
	bool use_short_preamble;
	bool use_short_slot;

1853 1854 1855 1856
	sband = ieee80211_get_sband(sdata);
	if (!sband)
		return changed;

J
Johannes Berg 已提交
1857 1858 1859 1860 1861 1862 1863 1864 1865
	if (erp_valid) {
		use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
		use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
	} else {
		use_protection = false;
		use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
	}

	use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1866
	if (sband->band == NL80211_BAND_5GHZ)
1867
		use_short_slot = true;
1868

1869 1870 1871
	if (use_protection != bss_conf->use_cts_prot) {
		bss_conf->use_cts_prot = use_protection;
		changed |= BSS_CHANGED_ERP_CTS_PROT;
1872
	}
1873

1874 1875
	if (use_short_preamble != bss_conf->use_short_preamble) {
		bss_conf->use_short_preamble = use_short_preamble;
1876
		changed |= BSS_CHANGED_ERP_PREAMBLE;
1877
	}
1878

J
Johannes Berg 已提交
1879 1880 1881
	if (use_short_slot != bss_conf->use_short_slot) {
		bss_conf->use_short_slot = use_short_slot;
		changed |= BSS_CHANGED_ERP_SLOT;
1882 1883 1884 1885 1886
	}

	return changed;
}

1887
static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1888
				     struct cfg80211_bss *cbss,
J
Johannes Berg 已提交
1889
				     u32 bss_info_changed)
1890
{
1891
	struct ieee80211_bss *bss = (void *)cbss->priv;
1892
	struct ieee80211_local *local = sdata->local;
1893
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1894

J
Johannes Berg 已提交
1895
	bss_info_changed |= BSS_CHANGED_ASSOC;
1896
	bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1897
		bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1898

1899
	sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1900
		beacon_loss_count * bss_conf->beacon_int));
1901

1902 1903
	sdata->u.mgd.associated = cbss;
	memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1904

1905 1906
	ieee80211_check_rate_mask(sdata);

1907 1908
	sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;

1909 1910
	if (sdata->vif.p2p ||
	    sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1911
		const struct cfg80211_bss_ies *ies;
1912

1913 1914 1915 1916 1917 1918 1919 1920
		rcu_read_lock();
		ies = rcu_dereference(cbss->ies);
		if (ies) {
			int ret;

			ret = cfg80211_get_p2p_attr(
					ies->data, ies->len,
					IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
J
Janusz Dziedzic 已提交
1921 1922
					(u8 *) &bss_conf->p2p_noa_attr,
					sizeof(bss_conf->p2p_noa_attr));
1923
			if (ret >= 2) {
J
Janusz Dziedzic 已提交
1924 1925
				sdata->u.mgd.p2p_noa_index =
					bss_conf->p2p_noa_attr.index;
1926 1927
				bss_info_changed |= BSS_CHANGED_P2P_PS;
			}
1928
		}
1929
		rcu_read_unlock();
1930 1931
	}

J
Johannes Berg 已提交
1932
	/* just to be sure */
1933
	ieee80211_stop_poll(sdata);
J
Johannes Berg 已提交
1934

1935
	ieee80211_led_assoc(local, 1);
1936

1937
	if (sdata->u.mgd.have_beacon) {
1938 1939 1940 1941 1942 1943 1944
		/*
		 * If the AP is buggy we may get here with no DTIM period
		 * known, so assume it's 1 which is the only safe assumption
		 * in that case, although if the TIM IE is broken powersave
		 * probably just won't work at all.
		 */
		bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1945
		bss_conf->beacon_rate = bss->beacon_rate;
1946
		bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1947
	} else {
1948
		bss_conf->beacon_rate = NULL;
1949
		bss_conf->dtim_period = 0;
1950
	}
1951

1952
	bss_conf->assoc = 1;
1953

1954
	/* Tell the driver to monitor connection quality (if supported) */
1955
	if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1956
	    bss_conf->cqm_rssi_thold)
1957 1958
		bss_info_changed |= BSS_CHANGED_CQM;

1959
	/* Enable ARP filtering */
1960
	if (bss_conf->arp_addr_cnt)
1961 1962
		bss_info_changed |= BSS_CHANGED_ARP_FILTER;

J
Johannes Berg 已提交
1963
	ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1964

J
Johannes Berg 已提交
1965
	mutex_lock(&local->iflist_mtx);
J
Johannes Berg 已提交
1966
	ieee80211_recalc_ps(local);
J
Johannes Berg 已提交
1967
	mutex_unlock(&local->iflist_mtx);
1968

1969
	ieee80211_recalc_smps(sdata);
E
Eliad Peller 已提交
1970 1971
	ieee80211_recalc_ps_vif(sdata);

1972
	netif_carrier_on(sdata->dev);
1973 1974
}

1975
static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1976 1977
				   u16 stype, u16 reason, bool tx,
				   u8 *frame_buf)
1978
{
1979
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1980
	struct ieee80211_local *local = sdata->local;
1981
	u32 changed = 0;
1982

1983
	sdata_assert_lock(sdata);
1984

1985 1986 1987
	if (WARN_ON_ONCE(tx && !frame_buf))
		return;

J
Johannes Berg 已提交
1988 1989 1990
	if (WARN_ON(!ifmgd->associated))
		return;

1991 1992
	ieee80211_stop_poll(sdata);

1993
	ifmgd->associated = NULL;
1994 1995
	netif_carrier_off(sdata->dev);

1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006
	/*
	 * if we want to get out of ps before disassoc (why?) we have
	 * to do it before sending disassoc, as otherwise the null-packet
	 * won't be valid.
	 */
	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
		local->hw.conf.flags &= ~IEEE80211_CONF_PS;
		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
	}
	local->ps_sdata = NULL;

E
Eliad Peller 已提交
2007 2008 2009
	/* disable per-vif ps */
	ieee80211_recalc_ps_vif(sdata);

2010 2011 2012
	/* make sure ongoing transmission finishes */
	synchronize_net();

2013 2014 2015 2016 2017 2018
	/*
	 * drop any frame before deauth/disassoc, this can be data or
	 * management frame. Since we are disconnecting, we should not
	 * insist sending these frames which can take time and delay
	 * the disconnection and possible the roaming.
	 */
2019
	if (tx)
2020
		ieee80211_flush_queues(local, sdata, true);
2021

2022 2023
	/* deauthenticate/disassociate now */
	if (tx || frame_buf)
2024 2025
		ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
					       reason, tx, frame_buf);
2026

2027
	/* flush out frame - make sure the deauth was actually sent */
2028
	if (tx)
2029
		ieee80211_flush_queues(local, sdata, false);
2030

2031
	/* clear bssid only after building the needed mgmt frames */
2032
	eth_zero_addr(ifmgd->bssid);
2033

2034
	/* remove AP and TDLS peers */
2035
	sta_info_flush(sdata);
2036 2037

	/* finally reset all BSS / config parameters */
2038 2039 2040
	changed |= ieee80211_reset_erp_info(sdata);

	ieee80211_led_assoc(local, 0);
J
Johannes Berg 已提交
2041 2042
	changed |= BSS_CHANGED_ASSOC;
	sdata->vif.bss_conf.assoc = false;
2043

J
Janusz Dziedzic 已提交
2044 2045 2046
	ifmgd->p2p_noa_index = -1;
	memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
	       sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2047

2048
	/* on the next assoc, re-program HT/VHT parameters */
B
Ben Greear 已提交
2049 2050
	memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
	memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2051 2052
	memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
	memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2053 2054 2055 2056 2057 2058 2059

	/* reset MU-MIMO ownership and group data */
	memset(sdata->vif.bss_conf.mu_group.membership, 0,
	       sizeof(sdata->vif.bss_conf.mu_group.membership));
	memset(sdata->vif.bss_conf.mu_group.position, 0,
	       sizeof(sdata->vif.bss_conf.mu_group.position));
	changed |= BSS_CHANGED_MU_GROUPS;
2060
	sdata->vif.mu_mimo_owner = false;
2061

2062
	sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2063

2064 2065 2066
	del_timer_sync(&local->dynamic_ps_timer);
	cancel_work_sync(&local->dynamic_ps_enable_work);

2067
	/* Disable ARP filtering */
2068
	if (sdata->vif.bss_conf.arp_addr_cnt)
2069 2070
		changed |= BSS_CHANGED_ARP_FILTER;

2071 2072 2073
	sdata->vif.bss_conf.qos = false;
	changed |= BSS_CHANGED_QOS;

2074 2075
	/* The BSSID (not really interesting) and HT changed */
	changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
J
Johannes Berg 已提交
2076
	ieee80211_bss_info_change_notify(sdata, changed);
2077

2078
	/* disassociated - set to defaults now */
2079
	ieee80211_set_wmm_default(sdata, false, false);
2080

2081 2082 2083 2084
	del_timer_sync(&sdata->u.mgd.conn_mon_timer);
	del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
	del_timer_sync(&sdata->u.mgd.timer);
	del_timer_sync(&sdata->u.mgd.chswitch_timer);
2085

2086
	sdata->vif.bss_conf.dtim_period = 0;
2087 2088
	sdata->vif.bss_conf.beacon_rate = NULL;

2089
	ifmgd->have_beacon = false;
2090

2091
	ifmgd->flags = 0;
2092
	mutex_lock(&local->mtx);
2093
	ieee80211_vif_release_channel(sdata);
2094 2095

	sdata->vif.csa_active = false;
2096
	ifmgd->csa_waiting_bcn = false;
2097
	ifmgd->csa_ignored_same_chan = false;
2098 2099 2100 2101 2102
	if (sdata->csa_block_tx) {
		ieee80211_wake_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
		sdata->csa_block_tx = false;
	}
2103
	mutex_unlock(&local->mtx);
2104

2105 2106 2107 2108
	/* existing TX TSPEC sessions no longer exist */
	memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
	cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);

2109
	sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2110
}
2111

2112 2113 2114 2115 2116 2117 2118 2119
void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
			     struct ieee80211_hdr *hdr)
{
	/*
	 * We can postpone the mgd.timer whenever receiving unicast frames
	 * from AP because we know that the connection is working both ways
	 * at that time. But multicast frames (and hence also beacons) must
	 * be ignored here, because we need to trigger the timer during
J
Johannes Berg 已提交
2120 2121
	 * data idle periods for sending the periodic probe request to the
	 * AP we're connected to.
2122
	 */
J
Johannes Berg 已提交
2123 2124 2125
	if (is_multicast_ether_addr(hdr->addr1))
		return;

2126
	ieee80211_sta_reset_conn_monitor(sdata);
2127
}
2128

2129 2130 2131
static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2132
	struct ieee80211_local *local = sdata->local;
2133

2134
	mutex_lock(&local->mtx);
2135 2136
	if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
		goto out;
2137

2138
	__ieee80211_stop_poll(sdata);
2139 2140

	mutex_lock(&local->iflist_mtx);
J
Johannes Berg 已提交
2141
	ieee80211_recalc_ps(local);
2142
	mutex_unlock(&local->iflist_mtx);
2143

2144
	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2145
		goto out;
2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156

	/*
	 * We've received a probe response, but are not sure whether
	 * we have or will be receiving any beacons or data, so let's
	 * schedule the timers again, just in case.
	 */
	ieee80211_sta_reset_beacon_monitor(sdata);

	mod_timer(&ifmgd->conn_mon_timer,
		  round_jiffies_up(jiffies +
				   IEEE80211_CONNECTION_IDLE_TIME));
2157 2158
out:
	mutex_unlock(&local->mtx);
2159 2160
}

2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195
static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
					   struct ieee80211_hdr *hdr,
					   u16 tx_time)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
	int ac = ieee80211_ac_from_tid(tid);
	struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
	unsigned long now = jiffies;

	if (likely(!tx_tspec->admitted_time))
		return;

	if (time_after(now, tx_tspec->time_slice_start + HZ)) {
		tx_tspec->consumed_tx_time = 0;
		tx_tspec->time_slice_start = now;

		if (tx_tspec->downgraded) {
			tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
			schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
		}
	}

	if (tx_tspec->downgraded)
		return;

	tx_tspec->consumed_tx_time += tx_time;

	if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
		tx_tspec->downgraded = true;
		tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
		schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
	}
}

2196
void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2197
			     struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2198
{
2199 2200
	ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);

F
Felix Fietkau 已提交
2201
	if (!ieee80211_is_data(hdr->frame_control))
2202 2203 2204 2205
	    return;

	if (ieee80211_is_nullfunc(hdr->frame_control) &&
	    sdata->u.mgd.probe_send_count > 0) {
2206
		if (ack)
2207
			ieee80211_sta_reset_conn_monitor(sdata);
2208 2209
		else
			sdata->u.mgd.nullfunc_failed = true;
2210
		ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2211
		return;
2212
	}
2213 2214 2215

	if (ack)
		ieee80211_sta_reset_conn_monitor(sdata);
2216 2217
}

2218 2219 2220 2221
static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	const u8 *ssid;
2222
	u8 *dst = ifmgd->associated->bssid;
2223
	u8 unicast_limit = max(1, max_probe_tries - 3);
J
Johannes Berg 已提交
2224
	struct sta_info *sta;
2225 2226 2227 2228 2229 2230 2231 2232

	/*
	 * Try sending broadcast probe requests for the last three
	 * probe requests after the first ones failed since some
	 * buggy APs only support broadcast probe requests.
	 */
	if (ifmgd->probe_send_count >= unicast_limit)
		dst = NULL;
2233

2234 2235 2236 2237 2238 2239 2240
	/*
	 * When the hardware reports an accurate Tx ACK status, it's
	 * better to send a nullfunc frame instead of a probe request,
	 * as it will kick us off the AP quickly if we aren't associated
	 * anymore. The timeout will be reset if the frame is ACKed by
	 * the AP.
	 */
2241 2242
	ifmgd->probe_send_count++;

J
Johannes Berg 已提交
2243 2244 2245 2246 2247 2248 2249 2250
	if (dst) {
		mutex_lock(&sdata->local->sta_mtx);
		sta = sta_info_get(sdata, dst);
		if (!WARN_ON(!sta))
			ieee80211_check_fast_rx(sta);
		mutex_unlock(&sdata->local->sta_mtx);
	}

2251
	if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2252
		ifmgd->nullfunc_failed = false;
2253
		ieee80211_send_nullfunc(sdata->local, sdata, false);
2254
	} else {
2255 2256
		int ssid_len;

2257
		rcu_read_lock();
2258
		ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2259 2260 2261 2262 2263
		if (WARN_ON_ONCE(ssid == NULL))
			ssid_len = 0;
		else
			ssid_len = ssid[1];

2264
		ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2265
					 ssid + 2, ssid_len, NULL,
2266
					 0, (u32) -1, true, 0,
J
Johannes Berg 已提交
2267
					 ifmgd->associated->channel, false);
2268
		rcu_read_unlock();
2269
	}
2270

2271
	ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2272
	run_again(sdata, ifmgd->probe_timeout);
2273 2274
}

J
Johannes Berg 已提交
2275 2276
static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
				   bool beacon)
2277 2278
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
2279
	bool already = false;
2280

2281
	if (!ieee80211_sdata_running(sdata))
2282 2283
		return;

2284
	sdata_lock(sdata);
2285 2286 2287 2288

	if (!ifmgd->associated)
		goto out;

2289 2290 2291 2292 2293 2294 2295
	mutex_lock(&sdata->local->mtx);

	if (sdata->local->tmp_channel || sdata->local->scanning) {
		mutex_unlock(&sdata->local->mtx);
		goto out;
	}

2296
	if (beacon) {
J
Johannes Berg 已提交
2297
		mlme_dbg_ratelimited(sdata,
2298 2299
				     "detected beacon loss from AP (missed %d beacons) - probing\n",
				     beacon_loss_count);
J
Johannes Berg 已提交
2300

2301
		ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2302
	}
2303

J
Johannes Berg 已提交
2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314
	/*
	 * The driver/our work has already reported this event or the
	 * connection monitoring has kicked in and we have already sent
	 * a probe request. Or maybe the AP died and the driver keeps
	 * reporting until we disassociate...
	 *
	 * In either case we have to ignore the current call to this
	 * function (except for setting the correct probe reason bit)
	 * because otherwise we would reset the timer every time and
	 * never check whether we received a probe response!
	 */
2315
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
J
Johannes Berg 已提交
2316 2317
		already = true;

E
Eliad Peller 已提交
2318 2319
	ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;

2320 2321
	mutex_unlock(&sdata->local->mtx);

J
Johannes Berg 已提交
2322 2323 2324
	if (already)
		goto out;

2325
	mutex_lock(&sdata->local->iflist_mtx);
J
Johannes Berg 已提交
2326
	ieee80211_recalc_ps(sdata->local);
2327 2328
	mutex_unlock(&sdata->local->iflist_mtx);

2329 2330
	ifmgd->probe_send_count = 0;
	ieee80211_mgd_probe_ap_send(sdata);
2331
 out:
2332
	sdata_unlock(sdata);
2333 2334
}

2335 2336 2337 2338 2339
struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
					  struct ieee80211_vif *vif)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2340
	struct cfg80211_bss *cbss;
2341 2342
	struct sk_buff *skb;
	const u8 *ssid;
2343
	int ssid_len;
2344 2345 2346 2347

	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
		return NULL;

2348
	sdata_assert_lock(sdata);
2349

2350 2351 2352 2353 2354 2355 2356
	if (ifmgd->associated)
		cbss = ifmgd->associated;
	else if (ifmgd->auth_data)
		cbss = ifmgd->auth_data->bss;
	else if (ifmgd->assoc_data)
		cbss = ifmgd->assoc_data->bss;
	else
2357 2358
		return NULL;

2359
	rcu_read_lock();
2360
	ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2361 2362 2363 2364 2365
	if (WARN_ON_ONCE(ssid == NULL))
		ssid_len = 0;
	else
		ssid_len = ssid[1];

2366
	skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
J
Johannes Berg 已提交
2367
					(u32) -1, cbss->channel,
2368
					ssid + 2, ssid_len,
2369
					NULL, 0, true);
2370
	rcu_read_unlock();
2371 2372 2373 2374 2375

	return skb;
}
EXPORT_SYMBOL(ieee80211_ap_probereq_get);

2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393
static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
					const u8 *buf, size_t len, bool tx,
					u16 reason)
{
	struct ieee80211_event event = {
		.type = MLME_EVENT,
		.u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
		.u.mlme.reason = reason,
	};

	if (tx)
		cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
	else
		cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);

	drv_event_callback(sdata->local, sdata, &event);
}

2394
static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2395
{
2396
	struct ieee80211_local *local = sdata->local;
2397
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2398
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2399

2400
	sdata_lock(sdata);
2401
	if (!ifmgd->associated) {
2402
		sdata_unlock(sdata);
2403 2404 2405
		return;
	}

2406 2407 2408 2409 2410
	/* AP is probably out of range (or not reachable for another reason) so
	 * remove the bss struct for that AP.
	 */
	cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);

2411 2412
	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
			       WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2413
			       true, frame_buf);
2414
	mutex_lock(&local->mtx);
2415
	sdata->vif.csa_active = false;
2416
	ifmgd->csa_waiting_bcn = false;
2417 2418 2419 2420 2421
	if (sdata->csa_block_tx) {
		ieee80211_wake_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
		sdata->csa_block_tx = false;
	}
2422
	mutex_unlock(&local->mtx);
2423

2424 2425 2426
	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
				    WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);

2427
	sdata_unlock(sdata);
2428 2429
}

2430
static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
J
Johannes Berg 已提交
2431 2432 2433
{
	struct ieee80211_sub_if_data *sdata =
		container_of(work, struct ieee80211_sub_if_data,
2434
			     u.mgd.beacon_connection_loss_work);
2435 2436
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

2437 2438
	if (ifmgd->associated)
		ifmgd->beacon_loss_count++;
J
Johannes Berg 已提交
2439

2440
	if (ifmgd->connection_loss) {
2441 2442
		sdata_info(sdata, "Connection to AP %pM lost\n",
			   ifmgd->bssid);
2443
		__ieee80211_disconnect(sdata);
2444
	} else {
2445
		ieee80211_mgd_probe_ap(sdata, true);
2446 2447 2448 2449 2450 2451 2452 2453 2454
	}
}

static void ieee80211_csa_connection_drop_work(struct work_struct *work)
{
	struct ieee80211_sub_if_data *sdata =
		container_of(work, struct ieee80211_sub_if_data,
			     u.mgd.csa_connection_drop_work);

2455
	__ieee80211_disconnect(sdata);
J
Johannes Berg 已提交
2456 2457
}

2458 2459 2460
void ieee80211_beacon_loss(struct ieee80211_vif *vif)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2461
	struct ieee80211_hw *hw = &sdata->local->hw;
2462

J
Johannes Berg 已提交
2463 2464
	trace_api_beacon_loss(sdata);

2465
	sdata->u.mgd.connection_loss = false;
2466
	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2467 2468 2469
}
EXPORT_SYMBOL(ieee80211_beacon_loss);

2470 2471 2472 2473 2474
void ieee80211_connection_loss(struct ieee80211_vif *vif)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
	struct ieee80211_hw *hw = &sdata->local->hw;

J
Johannes Berg 已提交
2475 2476
	trace_api_connection_loss(sdata);

2477
	sdata->u.mgd.connection_loss = true;
2478 2479 2480 2481 2482
	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
}
EXPORT_SYMBOL(ieee80211_connection_loss);


J
Johannes Berg 已提交
2483 2484 2485 2486 2487
static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
					bool assoc)
{
	struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;

2488
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
2489 2490

	if (!assoc) {
2491 2492 2493 2494 2495 2496
		/*
		 * we are not authenticated yet, the only timer that could be
		 * running is the timeout for the authentication response which
		 * which is not relevant anymore.
		 */
		del_timer_sync(&sdata->u.mgd.timer);
J
Johannes Berg 已提交
2497 2498
		sta_info_destroy_addr(sdata, auth_data->bss->bssid);

2499
		eth_zero_addr(sdata->u.mgd.bssid);
J
Johannes Berg 已提交
2500
		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2501
		sdata->u.mgd.flags = 0;
2502
		mutex_lock(&sdata->local->mtx);
J
Johannes Berg 已提交
2503
		ieee80211_vif_release_channel(sdata);
2504
		mutex_unlock(&sdata->local->mtx);
J
Johannes Berg 已提交
2505 2506
	}

2507
	cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
J
Johannes Berg 已提交
2508 2509 2510 2511
	kfree(auth_data);
	sdata->u.mgd.auth_data = NULL;
}

2512
static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2513
					 bool assoc, bool abandon)
2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530
{
	struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;

	sdata_assert_lock(sdata);

	if (!assoc) {
		/*
		 * we are not associated yet, the only timer that could be
		 * running is the timeout for the association response which
		 * which is not relevant anymore.
		 */
		del_timer_sync(&sdata->u.mgd.timer);
		sta_info_destroy_addr(sdata, assoc_data->bss->bssid);

		eth_zero_addr(sdata->u.mgd.bssid);
		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
		sdata->u.mgd.flags = 0;
2531 2532
		sdata->vif.mu_mimo_owner = false;

2533 2534 2535
		mutex_lock(&sdata->local->mtx);
		ieee80211_vif_release_channel(sdata);
		mutex_unlock(&sdata->local->mtx);
2536 2537 2538

		if (abandon)
			cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2539 2540 2541 2542 2543 2544
	}

	kfree(assoc_data);
	sdata->u.mgd.assoc_data = NULL;
}

J
Johannes Berg 已提交
2545 2546 2547
static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
				     struct ieee80211_mgmt *mgmt, size_t len)
{
2548
	struct ieee80211_local *local = sdata->local;
J
Johannes Berg 已提交
2549 2550 2551
	struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
	u8 *pos;
	struct ieee802_11_elems elems;
2552
	u32 tx_flags = 0;
J
Johannes Berg 已提交
2553 2554

	pos = mgmt->u.auth.variable;
2555
	ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
J
Johannes Berg 已提交
2556 2557 2558
	if (!elems.challenge)
		return;
	auth_data->expected_transaction = 4;
J
Johannes Berg 已提交
2559
	drv_mgd_prepare_tx(sdata->local, sdata);
2560
	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2561 2562
		tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
			   IEEE80211_TX_INTFL_MLME_CONN_TX;
2563
	ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
J
Johannes Berg 已提交
2564 2565 2566
			    elems.challenge - 2, elems.challenge_len + 2,
			    auth_data->bss->bssid, auth_data->bss->bssid,
			    auth_data->key, auth_data->key_len,
2567
			    auth_data->key_idx, tx_flags);
J
Johannes Berg 已提交
2568 2569
}

2570 2571
static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
				   struct ieee80211_mgmt *mgmt, size_t len)
J
Johannes Berg 已提交
2572 2573 2574 2575 2576
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	u8 bssid[ETH_ALEN];
	u16 auth_alg, auth_transaction, status_code;
	struct sta_info *sta;
2577 2578 2579 2580
	struct ieee80211_event event = {
		.type = MLME_EVENT,
		.u.mlme.data = AUTH_EVENT,
	};
J
Johannes Berg 已提交
2581

2582
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
2583 2584

	if (len < 24 + 6)
2585
		return;
J
Johannes Berg 已提交
2586 2587

	if (!ifmgd->auth_data || ifmgd->auth_data->done)
2588
		return;
J
Johannes Berg 已提交
2589 2590 2591

	memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);

2592
	if (!ether_addr_equal(bssid, mgmt->bssid))
2593
		return;
J
Johannes Berg 已提交
2594 2595 2596 2597 2598 2599

	auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
	auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
	status_code = le16_to_cpu(mgmt->u.auth.status_code);

	if (auth_alg != ifmgd->auth_data->algorithm ||
2600 2601 2602 2603 2604
	    auth_transaction != ifmgd->auth_data->expected_transaction) {
		sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
			   mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
			   auth_transaction,
			   ifmgd->auth_data->expected_transaction);
2605
		return;
2606
	}
J
Johannes Berg 已提交
2607 2608

	if (status_code != WLAN_STATUS_SUCCESS) {
J
Johannes Berg 已提交
2609 2610
		sdata_info(sdata, "%pM denied authentication (status %d)\n",
			   mgmt->sa, status_code);
2611
		ieee80211_destroy_auth_data(sdata, false);
2612
		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2613 2614 2615
		event.u.mlme.status = MLME_DENIED;
		event.u.mlme.reason = status_code;
		drv_event_callback(sdata->local, sdata, &event);
2616
		return;
J
Johannes Berg 已提交
2617 2618 2619 2620 2621 2622
	}

	switch (ifmgd->auth_data->algorithm) {
	case WLAN_AUTH_OPEN:
	case WLAN_AUTH_LEAP:
	case WLAN_AUTH_FT:
2623
	case WLAN_AUTH_SAE:
2624 2625 2626
	case WLAN_AUTH_FILS_SK:
	case WLAN_AUTH_FILS_SK_PFS:
	case WLAN_AUTH_FILS_PK:
J
Johannes Berg 已提交
2627 2628 2629 2630 2631
		break;
	case WLAN_AUTH_SHARED_KEY:
		if (ifmgd->auth_data->expected_transaction != 4) {
			ieee80211_auth_challenge(sdata, mgmt, len);
			/* need another frame */
2632
			return;
J
Johannes Berg 已提交
2633 2634 2635 2636 2637
		}
		break;
	default:
		WARN_ONCE(1, "invalid auth alg %d",
			  ifmgd->auth_data->algorithm);
2638
		return;
J
Johannes Berg 已提交
2639 2640
	}

2641 2642
	event.u.mlme.status = MLME_SUCCESS;
	drv_event_callback(sdata->local, sdata, &event);
J
Johannes Berg 已提交
2643
	sdata_info(sdata, "authenticated\n");
J
Johannes Berg 已提交
2644 2645
	ifmgd->auth_data->done = true;
	ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2646
	ifmgd->auth_data->timeout_started = true;
2647
	run_again(sdata, ifmgd->auth_data->timeout);
J
Johannes Berg 已提交
2648

2649 2650 2651 2652 2653 2654
	if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
	    ifmgd->auth_data->expected_transaction != 2) {
		/*
		 * Report auth frame to user space for processing since another
		 * round of Authentication frames is still needed.
		 */
2655
		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2656
		return;
2657 2658
	}

J
Johannes Berg 已提交
2659 2660 2661 2662 2663 2664 2665 2666
	/* move station state to auth */
	mutex_lock(&sdata->local->sta_mtx);
	sta = sta_info_get(sdata, bssid);
	if (!sta) {
		WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
		goto out_err;
	}
	if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
J
Johannes Berg 已提交
2667
		sdata_info(sdata, "failed moving %pM to auth\n", bssid);
J
Johannes Berg 已提交
2668 2669 2670 2671
		goto out_err;
	}
	mutex_unlock(&sdata->local->sta_mtx);

2672
	cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2673
	return;
J
Johannes Berg 已提交
2674 2675 2676 2677 2678
 out_err:
	mutex_unlock(&sdata->local->sta_mtx);
	/* ignore frame -- wait for timeout */
}

2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734
#define case_WLAN(type) \
	case WLAN_REASON_##type: return #type

static const char *ieee80211_get_reason_code_string(u16 reason_code)
{
	switch (reason_code) {
	case_WLAN(UNSPECIFIED);
	case_WLAN(PREV_AUTH_NOT_VALID);
	case_WLAN(DEAUTH_LEAVING);
	case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
	case_WLAN(DISASSOC_AP_BUSY);
	case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
	case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
	case_WLAN(DISASSOC_STA_HAS_LEFT);
	case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
	case_WLAN(DISASSOC_BAD_POWER);
	case_WLAN(DISASSOC_BAD_SUPP_CHAN);
	case_WLAN(INVALID_IE);
	case_WLAN(MIC_FAILURE);
	case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
	case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
	case_WLAN(IE_DIFFERENT);
	case_WLAN(INVALID_GROUP_CIPHER);
	case_WLAN(INVALID_PAIRWISE_CIPHER);
	case_WLAN(INVALID_AKMP);
	case_WLAN(UNSUPP_RSN_VERSION);
	case_WLAN(INVALID_RSN_IE_CAP);
	case_WLAN(IEEE8021X_FAILED);
	case_WLAN(CIPHER_SUITE_REJECTED);
	case_WLAN(DISASSOC_UNSPECIFIED_QOS);
	case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
	case_WLAN(DISASSOC_LOW_ACK);
	case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
	case_WLAN(QSTA_LEAVE_QBSS);
	case_WLAN(QSTA_NOT_USE);
	case_WLAN(QSTA_REQUIRE_SETUP);
	case_WLAN(QSTA_TIMEOUT);
	case_WLAN(QSTA_CIPHER_NOT_SUPP);
	case_WLAN(MESH_PEER_CANCELED);
	case_WLAN(MESH_MAX_PEERS);
	case_WLAN(MESH_CONFIG);
	case_WLAN(MESH_CLOSE);
	case_WLAN(MESH_MAX_RETRIES);
	case_WLAN(MESH_CONFIRM_TIMEOUT);
	case_WLAN(MESH_INVALID_GTK);
	case_WLAN(MESH_INCONSISTENT_PARAM);
	case_WLAN(MESH_INVALID_SECURITY);
	case_WLAN(MESH_PATH_ERROR);
	case_WLAN(MESH_PATH_NOFORWARD);
	case_WLAN(MESH_PATH_DEST_UNREACHABLE);
	case_WLAN(MAC_EXISTS_IN_MBSS);
	case_WLAN(MESH_CHAN_REGULATORY);
	case_WLAN(MESH_CHAN);
	default: return "<unknown>";
	}
}
J
Johannes Berg 已提交
2735

2736 2737
static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
				     struct ieee80211_mgmt *mgmt, size_t len)
2738
{
2739
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2740
	u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2741

2742
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
2743

2744
	if (len < 24 + 2)
2745
		return;
2746

2747 2748 2749
	if (ifmgd->associated &&
	    ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
		const u8 *bssid = ifmgd->associated->bssid;
2750

2751 2752 2753
		sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
			   bssid, reason_code,
			   ieee80211_get_reason_code_string(reason_code));
2754

2755
		ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2756

2757 2758 2759 2760
		ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
					    reason_code);
		return;
	}
2761

2762 2763 2764
	if (ifmgd->assoc_data &&
	    ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
		const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2765

2766 2767 2768 2769 2770
		sdata_info(sdata,
			   "deauthenticated from %pM while associating (Reason: %u=%s)\n",
			   bssid, reason_code,
			   ieee80211_get_reason_code_string(reason_code));

2771
		ieee80211_destroy_assoc_data(sdata, false, true);
2772 2773 2774 2775

		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
		return;
	}
2776 2777 2778
}


2779 2780
static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
				       struct ieee80211_mgmt *mgmt, size_t len)
2781
{
2782
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2783 2784
	u16 reason_code;

2785
	sdata_assert_lock(sdata);
2786

J
Johannes Berg 已提交
2787
	if (len < 24 + 2)
2788
		return;
2789

J
Johannes Berg 已提交
2790
	if (!ifmgd->associated ||
2791
	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2792
		return;
2793 2794 2795

	reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);

2796 2797 2798
	sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
		   mgmt->sa, reason_code,
		   ieee80211_get_reason_code_string(reason_code));
2799

2800 2801
	ieee80211_set_disassoc(sdata, 0, 0, false, NULL);

2802
	ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2803 2804
}

2805 2806 2807 2808
static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
				u8 *supp_rates, unsigned int supp_rates_len,
				u32 *rates, u32 *basic_rates,
				bool *have_higher_than_11mbit,
2809
				int *min_rate, int *min_rate_index,
2810
				int shift)
2811 2812 2813 2814
{
	int i, j;

	for (i = 0; i < supp_rates_len; i++) {
2815
		int rate = supp_rates[i] & 0x7f;
2816 2817
		bool is_basic = !!(supp_rates[i] & 0x80);

2818
		if ((rate * 5 * (1 << shift)) > 110)
2819 2820 2821
			*have_higher_than_11mbit = true;

		/*
2822 2823
		 * Skip HT and VHT BSS membership selectors since they're not
		 * rates.
2824
		 *
2825
		 * Note: Even though the membership selector and the basic
2826 2827 2828
		 *	 rate flag share the same bit, they are not exactly
		 *	 the same.
		 */
2829 2830
		if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
		    supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
2831 2832 2833
			continue;

		for (j = 0; j < sband->n_bitrates; j++) {
2834 2835 2836 2837 2838 2839 2840
			struct ieee80211_rate *br;
			int brate;

			br = &sband->bitrates[j];

			brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
			if (brate == rate) {
2841 2842 2843
				*rates |= BIT(j);
				if (is_basic)
					*basic_rates |= BIT(j);
2844 2845
				if ((rate * 5) < *min_rate) {
					*min_rate = rate * 5;
2846 2847 2848 2849 2850 2851 2852
					*min_rate_index = j;
				}
				break;
			}
		}
	}
}
2853

J
Johannes Berg 已提交
2854 2855
static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
				    struct cfg80211_bss *cbss,
J
Johannes Berg 已提交
2856
				    struct ieee80211_mgmt *mgmt, size_t len)
2857
{
2858
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2859
	struct ieee80211_local *local = sdata->local;
2860
	struct ieee80211_supported_band *sband;
2861
	struct sta_info *sta;
J
Johannes Berg 已提交
2862 2863
	u8 *pos;
	u16 capab_info, aid;
2864
	struct ieee802_11_elems elems;
J
Johannes Berg 已提交
2865
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2866 2867
	const struct cfg80211_bss_ies *bss_ies = NULL;
	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
J
Johannes Berg 已提交
2868
	u32 changed = 0;
2869
	int err;
2870
	bool ret;
2871

J
Johannes Berg 已提交
2872
	/* AssocResp and ReassocResp have identical structure */
2873 2874

	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
J
Johannes Berg 已提交
2875
	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2876

2877
	if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
J
Johannes Berg 已提交
2878 2879
		sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
			   aid);
2880 2881
	aid &= ~(BIT(15) | BIT(14));

2882 2883 2884
	ifmgd->broken_ap = false;

	if (aid == 0 || aid > IEEE80211_MAX_AID) {
J
Johannes Berg 已提交
2885 2886
		sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
			   aid);
2887 2888 2889 2890
		aid = 0;
		ifmgd->broken_ap = true;
	}

J
Johannes Berg 已提交
2891
	pos = mgmt->u.assoc_resp.variable;
2892
	ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
J
Johannes Berg 已提交
2893

2894
	if (!elems.supp_rates) {
J
Johannes Berg 已提交
2895
		sdata_info(sdata, "no SuppRates element in AssocResp\n");
J
Johannes Berg 已提交
2896
		return false;
2897 2898
	}

2899
	ifmgd->aid = aid;
2900 2901 2902
	ifmgd->tdls_chan_switch_prohibited =
		elems.ext_capab && elems.ext_capab_len >= 5 &&
		(elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2903

2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966
	/*
	 * Some APs are erroneously not including some information in their
	 * (re)association response frames. Try to recover by using the data
	 * from the beacon or probe response. This seems to afflict mobile
	 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
	 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
	 */
	if ((assoc_data->wmm && !elems.wmm_param) ||
	    (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
	     (!elems.ht_cap_elem || !elems.ht_operation)) ||
	    (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
	     (!elems.vht_cap_elem || !elems.vht_operation))) {
		const struct cfg80211_bss_ies *ies;
		struct ieee802_11_elems bss_elems;

		rcu_read_lock();
		ies = rcu_dereference(cbss->ies);
		if (ies)
			bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
					  GFP_ATOMIC);
		rcu_read_unlock();
		if (!bss_ies)
			return false;

		ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
				       false, &bss_elems);
		if (assoc_data->wmm &&
		    !elems.wmm_param && bss_elems.wmm_param) {
			elems.wmm_param = bss_elems.wmm_param;
			sdata_info(sdata,
				   "AP bug: WMM param missing from AssocResp\n");
		}

		/*
		 * Also check if we requested HT/VHT, otherwise the AP doesn't
		 * have to include the IEs in the (re)association response.
		 */
		if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
			elems.ht_cap_elem = bss_elems.ht_cap_elem;
			sdata_info(sdata,
				   "AP bug: HT capability missing from AssocResp\n");
		}
		if (!elems.ht_operation && bss_elems.ht_operation &&
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
			elems.ht_operation = bss_elems.ht_operation;
			sdata_info(sdata,
				   "AP bug: HT operation missing from AssocResp\n");
		}
		if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
			elems.vht_cap_elem = bss_elems.vht_cap_elem;
			sdata_info(sdata,
				   "AP bug: VHT capa missing from AssocResp\n");
		}
		if (!elems.vht_operation && bss_elems.vht_operation &&
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
			elems.vht_operation = bss_elems.vht_operation;
			sdata_info(sdata,
				   "AP bug: VHT operation missing from AssocResp\n");
		}
	}

2967 2968 2969 2970 2971 2972 2973
	/*
	 * We previously checked these in the beacon/probe response, so
	 * they should be present here. This is just a safety net.
	 */
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
	    (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
		sdata_info(sdata,
2974 2975 2976
			   "HT AP is missing WMM params or HT capability/operation\n");
		ret = false;
		goto out;
2977 2978 2979 2980 2981
	}

	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
	    (!elems.vht_cap_elem || !elems.vht_operation)) {
		sdata_info(sdata,
2982 2983 2984
			   "VHT AP is missing VHT capability/operation\n");
		ret = false;
		goto out;
2985 2986
	}

2987 2988 2989 2990 2991
	mutex_lock(&sdata->local->sta_mtx);
	/*
	 * station info was already allocated and inserted before
	 * the association and should be available to us
	 */
2992
	sta = sta_info_get(sdata, cbss->bssid);
2993 2994
	if (WARN_ON(!sta)) {
		mutex_unlock(&sdata->local->sta_mtx);
2995 2996
		ret = false;
		goto out;
2997
	}
2998

2999 3000 3001 3002 3003 3004
	sband = ieee80211_get_sband(sdata);
	if (!sband) {
		mutex_unlock(&sdata->local->sta_mtx);
		ret = false;
		goto out;
	}
3005

3006
	/* Set up internal HT/VHT capabilities */
3007
	if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
B
Ben Greear 已提交
3008
		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3009
						  elems.ht_cap_elem, sta);
3010

M
Mahesh Palivela 已提交
3011 3012
	if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
		ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3013
						    elems.vht_cap_elem, sta);
M
Mahesh Palivela 已提交
3014

3015 3016 3017 3018 3019 3020
	/*
	 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
	 * in their association response, so ignore that data for our own
	 * configuration. If it changed since the last beacon, we'll get the
	 * next beacon and update then.
	 */
3021

3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036
	/*
	 * If an operating mode notification IE is present, override the
	 * NSS calculation (that would be done in rate_control_rate_init())
	 * and use the # of streams from that element.
	 */
	if (elems.opmode_notif &&
	    !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
		u8 nss;

		nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
		nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
		nss += 1;
		sta->sta.rx_nss = nss;
	}

3037
	rate_control_rate_init(sta);
3038

3039
	if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
J
Johannes Berg 已提交
3040
		set_sta_flag(sta, WLAN_STA_MFP);
3041 3042 3043 3044
		sta->sta.mfp = true;
	} else {
		sta->sta.mfp = false;
	}
3045

3046
	sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3047

3048
	err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3049 3050 3051
	if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
		err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
	if (err) {
J
Johannes Berg 已提交
3052 3053 3054
		sdata_info(sdata,
			   "failed to move station %pM to desired state\n",
			   sta->sta.addr);
3055 3056
		WARN_ON(__sta_info_destroy(sta));
		mutex_unlock(&sdata->local->sta_mtx);
3057 3058
		ret = false;
		goto out;
3059 3060
	}

3061
	mutex_unlock(&sdata->local->sta_mtx);
3062

3063 3064 3065 3066 3067 3068 3069 3070
	/*
	 * Always handle WMM once after association regardless
	 * of the first value the AP uses. Setting -1 here has
	 * that effect because the AP values is an unsigned
	 * 4-bit value.
	 */
	ifmgd->wmm_last_param_set = -1;

3071
	if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3072
		ieee80211_set_wmm_default(sdata, false, false);
3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085
	} else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
					     elems.wmm_param_len)) {
		/* still enable QoS since we might have HT/VHT */
		ieee80211_set_wmm_default(sdata, false, true);
		/* set the disable-WMM flag in this case to disable
		 * tracking WMM parameter changes in the beacon if
		 * the parameters weren't actually valid. Doing so
		 * avoids changing parameters very strangely when
		 * the AP is going back and forth between valid and
		 * invalid parameters.
		 */
		ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
	}
3086
	changed |= BSS_CHANGED_QOS;
3087

3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099
	if (elems.max_idle_period_ie) {
		bss_conf->max_idle_period =
			le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
		bss_conf->protected_keep_alive =
			!!(elems.max_idle_period_ie->idle_options &
			   WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
		changed |= BSS_CHANGED_KEEP_ALIVE;
	} else {
		bss_conf->max_idle_period = 0;
		bss_conf->protected_keep_alive = false;
	}

J
Johannes Berg 已提交
3100 3101 3102 3103
	/* set AID and assoc capability,
	 * ieee80211_set_associated() will tell the driver */
	bss_conf->aid = aid;
	bss_conf->assoc_capability = capab_info;
3104
	ieee80211_set_associated(sdata, cbss, changed);
3105

3106 3107 3108 3109 3110 3111 3112
	/*
	 * If we're using 4-addr mode, let the AP know that we're
	 * doing so, so that it can create the STA VLAN on its side
	 */
	if (ifmgd->use_4addr)
		ieee80211_send_4addr_nullfunc(local, sdata);

3113
	/*
J
Johannes Berg 已提交
3114 3115
	 * Start timer to probe the connection to the AP now.
	 * Also start the timer that will detect beacon loss.
3116
	 */
J
Johannes Berg 已提交
3117
	ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3118
	ieee80211_sta_reset_beacon_monitor(sdata);
3119

3120 3121 3122 3123
	ret = true;
 out:
	kfree(bss_ies);
	return ret;
3124 3125
}

3126 3127 3128
static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
					 struct ieee80211_mgmt *mgmt,
					 size_t len)
J
Johannes Berg 已提交
3129 3130 3131 3132 3133
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
	u16 capab_info, status_code, aid;
	struct ieee802_11_elems elems;
3134
	int ac, uapsd_queues = -1;
J
Johannes Berg 已提交
3135 3136
	u8 *pos;
	bool reassoc;
3137
	struct cfg80211_bss *bss;
3138 3139 3140 3141
	struct ieee80211_event event = {
		.type = MLME_EVENT,
		.u.mlme.data = ASSOC_EVENT,
	};
J
Johannes Berg 已提交
3142

3143
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
3144 3145

	if (!assoc_data)
3146
		return;
3147
	if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3148
		return;
J
Johannes Berg 已提交
3149 3150 3151 3152 3153 3154 3155

	/*
	 * AssocResp and ReassocResp have identical structure, so process both
	 * of them in this function.
	 */

	if (len < 24 + 6)
3156
		return;
J
Johannes Berg 已提交
3157 3158 3159 3160 3161 3162

	reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
	status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);

J
Johannes Berg 已提交
3163 3164 3165 3166
	sdata_info(sdata,
		   "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
		   reassoc ? "Rea" : "A", mgmt->sa,
		   capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
J
Johannes Berg 已提交
3167

3168 3169 3170 3171
	if (assoc_data->fils_kek_len &&
	    fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
		return;

J
Johannes Berg 已提交
3172
	pos = mgmt->u.assoc_resp.variable;
3173
	ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
J
Johannes Berg 已提交
3174 3175

	if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3176 3177
	    elems.timeout_int &&
	    elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
J
Johannes Berg 已提交
3178
		u32 tu, ms;
3179
		tu = le32_to_cpu(elems.timeout_int->value);
J
Johannes Berg 已提交
3180
		ms = tu * 1024 / 1000;
J
Johannes Berg 已提交
3181 3182 3183
		sdata_info(sdata,
			   "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
			   mgmt->sa, tu, ms);
J
Johannes Berg 已提交
3184
		assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3185
		assoc_data->timeout_started = true;
J
Johannes Berg 已提交
3186
		if (ms > IEEE80211_ASSOC_TIMEOUT)
3187 3188
			run_again(sdata, assoc_data->timeout);
		return;
J
Johannes Berg 已提交
3189 3190
	}

3191
	bss = assoc_data->bss;
J
Johannes Berg 已提交
3192 3193

	if (status_code != WLAN_STATUS_SUCCESS) {
J
Johannes Berg 已提交
3194 3195
		sdata_info(sdata, "%pM denied association (code=%d)\n",
			   mgmt->sa, status_code);
3196
		ieee80211_destroy_assoc_data(sdata, false, false);
3197 3198 3199
		event.u.mlme.status = MLME_DENIED;
		event.u.mlme.reason = status_code;
		drv_event_callback(sdata->local, sdata, &event);
J
Johannes Berg 已提交
3200
	} else {
3201
		if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
J
Johannes Berg 已提交
3202
			/* oops -- internal error -- send timeout for now */
3203
			ieee80211_destroy_assoc_data(sdata, false, false);
3204
			cfg80211_assoc_timeout(sdata->dev, bss);
3205
			return;
J
Johannes Berg 已提交
3206
		}
3207 3208
		event.u.mlme.status = MLME_SUCCESS;
		drv_event_callback(sdata->local, sdata, &event);
3209
		sdata_info(sdata, "associated\n");
3210 3211 3212 3213 3214 3215

		/*
		 * destroy assoc_data afterwards, as otherwise an idle
		 * recalc after assoc_data is NULL but before associated
		 * is set can cause the interface to go idle
		 */
3216
		ieee80211_destroy_assoc_data(sdata, true, false);
3217 3218 3219 3220 3221

		/* get uapsd queues configuration */
		uapsd_queues = 0;
		for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
			if (sdata->tx_conf[ac].uapsd)
3222
				uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
J
Johannes Berg 已提交
3223 3224
	}

3225
	cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
J
Johannes Berg 已提交
3226
}
J
Johannes Berg 已提交
3227

3228
static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
J
Johannes Berg 已提交
3229
				  struct ieee80211_mgmt *mgmt, size_t len,
3230
				  struct ieee80211_rx_status *rx_status,
3231
				  struct ieee802_11_elems *elems)
3232 3233
{
	struct ieee80211_local *local = sdata->local;
3234
	struct ieee80211_bss *bss;
3235
	struct ieee80211_channel *channel;
3236

3237
	sdata_assert_lock(sdata);
3238

3239 3240
	channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
	if (!channel)
3241 3242 3243
		return;

	bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3244
					channel);
3245 3246
	if (bss) {
		sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3247
		ieee80211_rx_bss_put(local, bss);
3248
	}
3249 3250 3251
}


3252
static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
J
Johannes Berg 已提交
3253
					 struct sk_buff *skb)
3254
{
J
Johannes Berg 已提交
3255
	struct ieee80211_mgmt *mgmt = (void *)skb->data;
3256
	struct ieee80211_if_managed *ifmgd;
J
Johannes Berg 已提交
3257 3258
	struct ieee80211_rx_status *rx_status = (void *) skb->cb;
	size_t baselen, len = skb->len;
3259 3260
	struct ieee802_11_elems elems;

3261 3262
	ifmgd = &sdata->u.mgd;

3263
	sdata_assert_lock(sdata);
3264

3265
	if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3266 3267
		return; /* ignore ProbeResp to foreign address */

3268 3269 3270 3271 3272
	baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
	if (baselen > len)
		return;

	ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3273
			       false, &elems);
3274

3275
	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3276

3277
	if (ifmgd->associated &&
3278
	    ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3279
		ieee80211_reset_ap_probe(sdata);
3280 3281
}

3282 3283 3284
/*
 * This is the canonical list of information elements we care about,
 * the filter code also gives us all changes to the Microsoft OUI
3285 3286 3287
 * (00:50:F2) vendor IE which is used for WMM which we need to track,
 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
 * changes to requested client power.
3288 3289 3290 3291 3292 3293 3294 3295 3296 3297
 *
 * We implement beacon filtering in software since that means we can
 * avoid processing the frame here and in cfg80211, and userspace
 * will not be able to tell whether the hardware supports it or not.
 *
 * XXX: This list needs to be dynamic -- userspace needs to be able to
 *	add items it requires. It also needs to be able to tell us to
 *	look out for other vendor IEs.
 */
static const u64 care_about_ies =
3298 3299 3300 3301 3302
	(1ULL << WLAN_EID_COUNTRY) |
	(1ULL << WLAN_EID_ERP_INFO) |
	(1ULL << WLAN_EID_CHANNEL_SWITCH) |
	(1ULL << WLAN_EID_PWR_CONSTRAINT) |
	(1ULL << WLAN_EID_HT_CAPABILITY) |
3303 3304
	(1ULL << WLAN_EID_HT_OPERATION) |
	(1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3305

3306 3307 3308
static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
				     struct ieee80211_mgmt *mgmt, size_t len,
				     struct ieee80211_rx_status *rx_status)
3309
{
3310
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3311
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3312 3313
	size_t baselen;
	struct ieee802_11_elems elems;
3314
	struct ieee80211_local *local = sdata->local;
J
Johannes Berg 已提交
3315 3316
	struct ieee80211_chanctx_conf *chanctx_conf;
	struct ieee80211_channel *chan;
3317
	struct sta_info *sta;
3318
	u32 changed = 0;
3319
	bool erp_valid;
J
Johannes Berg 已提交
3320
	u8 erp_value = 0;
3321
	u32 ncrc;
3322
	u8 *bssid;
3323
	u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3324

3325
	sdata_assert_lock(sdata);
3326

3327 3328 3329
	/* Process beacon from the current BSS */
	baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
	if (baselen > len)
3330
		return;
3331

J
Johannes Berg 已提交
3332 3333 3334 3335
	rcu_read_lock();
	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
	if (!chanctx_conf) {
		rcu_read_unlock();
3336
		return;
J
Johannes Berg 已提交
3337 3338
	}

3339
	if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
J
Johannes Berg 已提交
3340
		rcu_read_unlock();
3341
		return;
J
Johannes Berg 已提交
3342
	}
3343
	chan = chanctx_conf->def.chan;
J
Johannes Berg 已提交
3344
	rcu_read_unlock();
3345

3346
	if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3347
	    ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
J
Johannes Berg 已提交
3348
		ieee802_11_parse_elems(mgmt->u.beacon.variable,
3349
				       len - baselen, false, &elems);
3350

3351
		ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3352 3353 3354 3355
		if (elems.tim && !elems.parse_error) {
			const struct ieee80211_tim_ie *tim_ie = elems.tim;
			ifmgd->dtim_period = tim_ie->dtim_period;
		}
3356
		ifmgd->have_beacon = true;
3357
		ifmgd->assoc_data->need_beacon = false;
3358
		if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3359 3360 3361 3362 3363 3364 3365 3366 3367 3368
			sdata->vif.bss_conf.sync_tsf =
				le64_to_cpu(mgmt->u.beacon.timestamp);
			sdata->vif.bss_conf.sync_device_ts =
				rx_status->device_timestamp;
			if (elems.tim)
				sdata->vif.bss_conf.sync_dtim_count =
					elems.tim->dtim_count;
			else
				sdata->vif.bss_conf.sync_dtim_count = 0;
		}
J
Johannes Berg 已提交
3369 3370
		/* continue assoc process */
		ifmgd->assoc_data->timeout = jiffies;
3371
		ifmgd->assoc_data->timeout_started = true;
3372 3373
		run_again(sdata, ifmgd->assoc_data->timeout);
		return;
J
Johannes Berg 已提交
3374
	}
3375

J
Johannes Berg 已提交
3376
	if (!ifmgd->associated ||
3377
	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3378
		return;
J
Johannes Berg 已提交
3379
	bssid = ifmgd->associated->bssid;
3380

3381 3382 3383
	/* Track average RSSI from the Beacon frames of the current AP */
	if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
		ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3384
		ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3385
		ifmgd->last_cqm_event_signal = 0;
3386
		ifmgd->count_beacon_signal = 1;
3387
		ifmgd->last_ave_beacon_signal = 0;
3388
	} else {
3389
		ifmgd->count_beacon_signal++;
3390
	}
3391

3392 3393
	ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);

3394 3395
	if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3396
		int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3397
		int last_sig = ifmgd->last_ave_beacon_signal;
3398 3399 3400
		struct ieee80211_event event = {
			.type = RSSI_EVENT,
		};
3401 3402 3403 3404 3405 3406 3407 3408

		/*
		 * if signal crosses either of the boundaries, invoke callback
		 * with appropriate parameters
		 */
		if (sig > ifmgd->rssi_max_thold &&
		    (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
			ifmgd->last_ave_beacon_signal = sig;
3409 3410
			event.u.rssi.data = RSSI_EVENT_HIGH;
			drv_event_callback(local, sdata, &event);
3411 3412 3413 3414
		} else if (sig < ifmgd->rssi_min_thold &&
			   (last_sig >= ifmgd->rssi_max_thold ||
			   last_sig == 0)) {
			ifmgd->last_ave_beacon_signal = sig;
3415 3416
			event.u.rssi.data = RSSI_EVENT_LOW;
			drv_event_callback(local, sdata, &event);
3417 3418 3419
		}
	}

3420
	if (bss_conf->cqm_rssi_thold &&
3421
	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3422
	    !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3423
		int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3424 3425 3426
		int last_event = ifmgd->last_cqm_event_signal;
		int thold = bss_conf->cqm_rssi_thold;
		int hyst = bss_conf->cqm_rssi_hyst;
3427

3428 3429 3430 3431 3432 3433
		if (sig < thold &&
		    (last_event == 0 || sig < last_event - hyst)) {
			ifmgd->last_cqm_event_signal = sig;
			ieee80211_cqm_rssi_notify(
				&sdata->vif,
				NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3434
				sig, GFP_KERNEL);
3435 3436 3437 3438 3439 3440
		} else if (sig > thold &&
			   (last_event == 0 || sig > last_event + hyst)) {
			ifmgd->last_cqm_event_signal = sig;
			ieee80211_cqm_rssi_notify(
				&sdata->vif,
				NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3441
				sig, GFP_KERNEL);
3442 3443 3444
		}
	}

3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468
	if (bss_conf->cqm_rssi_low &&
	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
		int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
		int last_event = ifmgd->last_cqm_event_signal;
		int low = bss_conf->cqm_rssi_low;
		int high = bss_conf->cqm_rssi_high;

		if (sig < low &&
		    (last_event == 0 || last_event >= low)) {
			ifmgd->last_cqm_event_signal = sig;
			ieee80211_cqm_rssi_notify(
				&sdata->vif,
				NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
				sig, GFP_KERNEL);
		} else if (sig > high &&
			   (last_event == 0 || last_event <= high)) {
			ifmgd->last_cqm_event_signal = sig;
			ieee80211_cqm_rssi_notify(
				&sdata->vif,
				NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
				sig, GFP_KERNEL);
		}
	}

3469
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
J
Johannes Berg 已提交
3470
		mlme_dbg_ratelimited(sdata,
3471
				     "cancelling AP probe due to a received beacon\n");
3472
		ieee80211_reset_ap_probe(sdata);
3473 3474
	}

J
Johannes Berg 已提交
3475 3476 3477 3478
	/*
	 * Push the beacon loss detection into the future since
	 * we are processing a beacon from the AP just now.
	 */
3479
	ieee80211_sta_reset_beacon_monitor(sdata);
J
Johannes Berg 已提交
3480

3481 3482
	ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
	ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3483
					  len - baselen, false, &elems,
3484 3485
					  care_about_ies, ncrc);

3486 3487 3488 3489 3490 3491 3492
	if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
	    ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
		if (local->hw.conf.dynamic_ps_timeout > 0) {
			if (local->hw.conf.flags & IEEE80211_CONF_PS) {
				local->hw.conf.flags &= ~IEEE80211_CONF_PS;
				ieee80211_hw_config(local,
						    IEEE80211_CONF_CHANGE_PS);
3493
			}
3494
			ieee80211_send_nullfunc(local, sdata, false);
3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506
		} else if (!local->pspolling && sdata->u.mgd.powersave) {
			local->pspolling = true;

			/*
			 * Here is assumed that the driver will be
			 * able to send ps-poll frame and receive a
			 * response even though power save mode is
			 * enabled, but some drivers might require
			 * to disable power save here. This needs
			 * to be investigated.
			 */
			ieee80211_send_pspoll(local, sdata);
3507 3508
		}
	}
J
Johannes Berg 已提交
3509

3510 3511
	if (sdata->vif.p2p ||
	    sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
J
Janusz Dziedzic 已提交
3512
		struct ieee80211_p2p_noa_attr noa = {};
3513 3514 3515 3516 3517
		int ret;

		ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
					    len - baselen,
					    IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3518
					    (u8 *) &noa, sizeof(noa));
J
Janusz Dziedzic 已提交
3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534
		if (ret >= 2) {
			if (sdata->u.mgd.p2p_noa_index != noa.index) {
				/* valid noa_attr and index changed */
				sdata->u.mgd.p2p_noa_index = noa.index;
				memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
				changed |= BSS_CHANGED_P2P_PS;
				/*
				 * make sure we update all information, the CRC
				 * mechanism doesn't look at P2P attributes.
				 */
				ifmgd->beacon_crc_valid = false;
			}
		} else if (sdata->u.mgd.p2p_noa_index != -1) {
			/* noa_attr not found and we had valid noa_attr before */
			sdata->u.mgd.p2p_noa_index = -1;
			memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3535 3536 3537 3538 3539
			changed |= BSS_CHANGED_P2P_PS;
			ifmgd->beacon_crc_valid = false;
		}
	}

3540 3541 3542
	if (ifmgd->csa_waiting_bcn)
		ieee80211_chswitch_post_beacon(sdata);

3543 3544 3545 3546 3547 3548 3549 3550
	/*
	 * Update beacon timing and dtim count on every beacon appearance. This
	 * will allow the driver to use the most updated values. Do it before
	 * comparing this one with last received beacon.
	 * IMPORTANT: These parameters would possibly be out of sync by the time
	 * the driver will use them. The synchronized view is currently
	 * guaranteed only in certain callbacks.
	 */
3551
	if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562
		sdata->vif.bss_conf.sync_tsf =
			le64_to_cpu(mgmt->u.beacon.timestamp);
		sdata->vif.bss_conf.sync_device_ts =
			rx_status->device_timestamp;
		if (elems.tim)
			sdata->vif.bss_conf.sync_dtim_count =
				elems.tim->dtim_count;
		else
			sdata->vif.bss_conf.sync_dtim_count = 0;
	}

3563
	if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3564
		return;
3565
	ifmgd->beacon_crc = ncrc;
3566
	ifmgd->beacon_crc_valid = true;
3567

3568
	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3569

3570
	ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3571
					 rx_status->device_timestamp,
3572 3573
					 &elems, true);

3574 3575
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
	    ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3576 3577 3578
				     elems.wmm_param_len))
		changed |= BSS_CHANGED_QOS;

3579 3580
	/*
	 * If we haven't had a beacon before, tell the driver about the
3581
	 * DTIM period (and beacon timing if desired) now.
3582
	 */
3583
	if (!ifmgd->have_beacon) {
3584 3585 3586 3587 3588
		/* a few bogus AP send dtim_period = 0 or no TIM IE */
		if (elems.tim)
			bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
		else
			bss_conf->dtim_period = 1;
3589

3590 3591
		changed |= BSS_CHANGED_BEACON_INFO;
		ifmgd->have_beacon = true;
3592 3593

		mutex_lock(&local->iflist_mtx);
J
Johannes Berg 已提交
3594
		ieee80211_recalc_ps(local);
3595 3596
		mutex_unlock(&local->iflist_mtx);

3597
		ieee80211_recalc_ps_vif(sdata);
3598 3599
	}

3600
	if (elems.erp_info) {
J
Johannes Berg 已提交
3601 3602 3603 3604
		erp_valid = true;
		erp_value = elems.erp_info[0];
	} else {
		erp_valid = false;
3605
	}
J
Johannes Berg 已提交
3606 3607 3608
	changed |= ieee80211_handle_bss_capability(sdata,
			le16_to_cpu(mgmt->u.beacon.capab_info),
			erp_valid, erp_value);
3609

3610
	mutex_lock(&local->sta_mtx);
3611 3612
	sta = sta_info_get(sdata, bssid);

3613 3614
	if (ieee80211_config_bw(sdata, sta,
				elems.ht_cap_elem, elems.ht_operation,
3615 3616
				elems.vht_operation, bssid, &changed)) {
		mutex_unlock(&local->sta_mtx);
3617 3618 3619
		sdata_info(sdata,
			   "failed to follow AP %pM bandwidth change, disconnect\n",
			   bssid);
3620 3621 3622
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       WLAN_REASON_DEAUTH_LEAVING,
				       true, deauth_buf);
3623 3624 3625
		ieee80211_report_disconnect(sdata, deauth_buf,
					    sizeof(deauth_buf), true,
					    WLAN_REASON_DEAUTH_LEAVING);
3626
		return;
3627
	}
3628 3629 3630

	if (sta && elems.opmode_notif)
		ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3631
					    rx_status->band);
3632
	mutex_unlock(&local->sta_mtx);
3633

3634 3635 3636
	changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
					       elems.country_elem,
					       elems.country_elem_len,
3637 3638
					       elems.pwr_constr_elem,
					       elems.cisco_dtpc_elem);
3639

3640
	ieee80211_bss_info_change_notify(sdata, changed);
3641 3642
}

3643 3644
void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
				  struct sk_buff *skb)
3645 3646 3647 3648
{
	struct ieee80211_rx_status *rx_status;
	struct ieee80211_mgmt *mgmt;
	u16 fc;
3649 3650
	struct ieee802_11_elems elems;
	int ies_len;
3651 3652 3653 3654 3655

	rx_status = (struct ieee80211_rx_status *) skb->cb;
	mgmt = (struct ieee80211_mgmt *) skb->data;
	fc = le16_to_cpu(mgmt->frame_control);

3656
	sdata_lock(sdata);
3657

J
Johannes Berg 已提交
3658 3659
	switch (fc & IEEE80211_FCTL_STYPE) {
	case IEEE80211_STYPE_BEACON:
3660
		ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
J
Johannes Berg 已提交
3661 3662 3663 3664 3665
		break;
	case IEEE80211_STYPE_PROBE_RESP:
		ieee80211_rx_mgmt_probe_resp(sdata, skb);
		break;
	case IEEE80211_STYPE_AUTH:
3666
		ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
3667 3668
		break;
	case IEEE80211_STYPE_DEAUTH:
3669
		ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
3670 3671
		break;
	case IEEE80211_STYPE_DISASSOC:
3672
		ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
3673 3674 3675
		break;
	case IEEE80211_STYPE_ASSOC_RESP:
	case IEEE80211_STYPE_REASSOC_RESP:
3676
		ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
3677 3678
		break;
	case IEEE80211_STYPE_ACTION:
3679
		if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3680 3681 3682
			ies_len = skb->len -
				  offsetof(struct ieee80211_mgmt,
					   u.action.u.chan_switch.variable);
3683 3684 3685 3686 3687 3688

			if (ies_len < 0)
				break;

			ieee802_11_parse_elems(
				mgmt->u.action.u.chan_switch.variable,
3689
				ies_len, true, &elems);
3690 3691 3692 3693

			if (elems.parse_error)
				break;

3694
			ieee80211_sta_process_chanswitch(sdata,
3695 3696 3697
						 rx_status->mactime,
						 rx_status->device_timestamp,
						 &elems, false);
3698 3699 3700 3701 3702 3703 3704 3705 3706 3707
		} else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
			ies_len = skb->len -
				  offsetof(struct ieee80211_mgmt,
					   u.action.u.ext_chan_switch.variable);

			if (ies_len < 0)
				break;

			ieee802_11_parse_elems(
				mgmt->u.action.u.ext_chan_switch.variable,
3708
				ies_len, true, &elems);
3709 3710 3711 3712 3713 3714 3715 3716

			if (elems.parse_error)
				break;

			/* for the handling code pretend this was also an IE */
			elems.ext_chansw_ie =
				&mgmt->u.action.u.ext_chan_switch.data;

J
Johannes Berg 已提交
3717
			ieee80211_sta_process_chanswitch(sdata,
3718 3719 3720
						 rx_status->mactime,
						 rx_status->device_timestamp,
						 &elems, false);
3721
		}
3722
		break;
3723
	}
3724
	sdata_unlock(sdata);
3725 3726
}

J
Johannes Berg 已提交
3727
static void ieee80211_sta_timer(unsigned long data)
3728
{
J
Johannes Berg 已提交
3729 3730
	struct ieee80211_sub_if_data *sdata =
		(struct ieee80211_sub_if_data *) data;
3731

3732
	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3733 3734
}

3735
static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3736
					  u8 *bssid, u8 reason, bool tx)
3737
{
3738
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3739

3740
	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3741
			       tx, frame_buf);
3742

3743 3744
	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
				    reason);
3745 3746
}

3747
static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
J
Johannes Berg 已提交
3748 3749 3750 3751
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3752
	u32 tx_flags = 0;
3753 3754
	u16 trans = 1;
	u16 status = 0;
J
Johannes Berg 已提交
3755

3756
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
3757 3758 3759 3760 3761 3762 3763

	if (WARN_ON_ONCE(!auth_data))
		return -EINVAL;

	auth_data->tries++;

	if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
J
Johannes Berg 已提交
3764 3765
		sdata_info(sdata, "authentication with %pM timed out\n",
			   auth_data->bss->bssid);
J
Johannes Berg 已提交
3766 3767 3768 3769 3770 3771 3772 3773 3774 3775

		/*
		 * Most likely AP is not in the range so remove the
		 * bss struct for that AP.
		 */
		cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);

		return -ETIMEDOUT;
	}

J
Johannes Berg 已提交
3776 3777
	drv_mgd_prepare_tx(local, sdata);

3778 3779 3780
	sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
		   auth_data->bss->bssid, auth_data->tries,
		   IEEE80211_AUTH_MAX_TRIES);
J
Johannes Berg 已提交
3781

3782
	auth_data->expected_transaction = 2;
3783

3784 3785 3786 3787 3788
	if (auth_data->algorithm == WLAN_AUTH_SAE) {
		trans = auth_data->sae_trans;
		status = auth_data->sae_status;
		auth_data->expected_transaction = trans;
	}
J
Johannes Berg 已提交
3789

3790 3791 3792
	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
		tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
			   IEEE80211_TX_INTFL_MLME_CONN_TX;
J
Johannes Berg 已提交
3793

3794 3795 3796 3797 3798
	ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
			    auth_data->data, auth_data->data_len,
			    auth_data->bss->bssid,
			    auth_data->bss->bssid, NULL, 0, 0,
			    tx_flags);
J
Johannes Berg 已提交
3799

3800
	if (tx_flags == 0) {
3801
		auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3802
		auth_data->timeout_started = true;
3803
		run_again(sdata, auth_data->timeout);
3804
	} else {
3805 3806 3807 3808
		auth_data->timeout =
			round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
		auth_data->timeout_started = true;
		run_again(sdata, auth_data->timeout);
3809
	}
J
Johannes Berg 已提交
3810 3811 3812 3813 3814 3815 3816 3817 3818

	return 0;
}

static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
	struct ieee80211_local *local = sdata->local;

3819
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
3820 3821 3822

	assoc_data->tries++;
	if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
J
Johannes Berg 已提交
3823 3824
		sdata_info(sdata, "association with %pM timed out\n",
			   assoc_data->bss->bssid);
J
Johannes Berg 已提交
3825 3826 3827 3828 3829 3830 3831 3832 3833 3834

		/*
		 * Most likely AP is not in the range so remove the
		 * bss struct for that AP.
		 */
		cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);

		return -ETIMEDOUT;
	}

J
Johannes Berg 已提交
3835 3836 3837
	sdata_info(sdata, "associate with %pM (try %d/%d)\n",
		   assoc_data->bss->bssid, assoc_data->tries,
		   IEEE80211_ASSOC_MAX_TRIES);
J
Johannes Berg 已提交
3838 3839
	ieee80211_send_assoc(sdata);

3840
	if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3841
		assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3842
		assoc_data->timeout_started = true;
3843
		run_again(sdata, assoc_data->timeout);
3844
	} else {
3845 3846 3847 3848 3849
		assoc_data->timeout =
			round_jiffies_up(jiffies +
					 IEEE80211_ASSOC_TIMEOUT_LONG);
		assoc_data->timeout_started = true;
		run_again(sdata, assoc_data->timeout);
3850
	}
J
Johannes Berg 已提交
3851 3852 3853 3854

	return 0;
}

3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866
void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
				  __le16 fc, bool acked)
{
	struct ieee80211_local *local = sdata->local;

	sdata->u.mgd.status_fc = fc;
	sdata->u.mgd.status_acked = acked;
	sdata->u.mgd.status_received = true;

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

3867
void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
J
Johannes Berg 已提交
3868 3869
{
	struct ieee80211_local *local = sdata->local;
3870
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
3871

3872
	sdata_lock(sdata);
3873

3874 3875 3876 3877 3878
	if (ifmgd->status_received) {
		__le16 fc = ifmgd->status_fc;
		bool status_acked = ifmgd->status_acked;

		ifmgd->status_received = false;
3879
		if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3880 3881 3882
			if (status_acked) {
				ifmgd->auth_data->timeout =
					jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3883
				run_again(sdata, ifmgd->auth_data->timeout);
3884 3885 3886
			} else {
				ifmgd->auth_data->timeout = jiffies - 1;
			}
3887
			ifmgd->auth_data->timeout_started = true;
3888 3889 3890 3891 3892 3893
		} else if (ifmgd->assoc_data &&
			   (ieee80211_is_assoc_req(fc) ||
			    ieee80211_is_reassoc_req(fc))) {
			if (status_acked) {
				ifmgd->assoc_data->timeout =
					jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3894
				run_again(sdata, ifmgd->assoc_data->timeout);
3895 3896 3897
			} else {
				ifmgd->assoc_data->timeout = jiffies - 1;
			}
3898
			ifmgd->assoc_data->timeout_started = true;
3899 3900 3901
		}
	}

3902
	if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
J
Johannes Berg 已提交
3903 3904 3905 3906 3907 3908 3909
	    time_after(jiffies, ifmgd->auth_data->timeout)) {
		if (ifmgd->auth_data->done) {
			/*
			 * ok ... we waited for assoc but userspace didn't,
			 * so let's just kill the auth data
			 */
			ieee80211_destroy_auth_data(sdata, false);
3910
		} else if (ieee80211_auth(sdata)) {
J
Johannes Berg 已提交
3911
			u8 bssid[ETH_ALEN];
3912 3913 3914 3915 3916
			struct ieee80211_event event = {
				.type = MLME_EVENT,
				.u.mlme.data = AUTH_EVENT,
				.u.mlme.status = MLME_TIMEOUT,
			};
J
Johannes Berg 已提交
3917 3918 3919 3920 3921

			memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);

			ieee80211_destroy_auth_data(sdata, false);

3922
			cfg80211_auth_timeout(sdata->dev, bssid);
3923
			drv_event_callback(sdata->local, sdata, &event);
J
Johannes Berg 已提交
3924
		}
3925
	} else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3926
		run_again(sdata, ifmgd->auth_data->timeout);
J
Johannes Berg 已提交
3927

3928
	if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
J
Johannes Berg 已提交
3929
	    time_after(jiffies, ifmgd->assoc_data->timeout)) {
3930
		if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
J
Johannes Berg 已提交
3931
		    ieee80211_do_assoc(sdata)) {
3932
			struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3933 3934 3935 3936 3937
			struct ieee80211_event event = {
				.type = MLME_EVENT,
				.u.mlme.data = ASSOC_EVENT,
				.u.mlme.status = MLME_TIMEOUT,
			};
J
Johannes Berg 已提交
3938

3939
			ieee80211_destroy_assoc_data(sdata, false, false);
3940
			cfg80211_assoc_timeout(sdata->dev, bss);
3941
			drv_event_callback(sdata->local, sdata, &event);
J
Johannes Berg 已提交
3942
		}
3943
	} else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3944
		run_again(sdata, ifmgd->assoc_data->timeout);
J
Johannes Berg 已提交
3945

3946
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
J
Johannes Berg 已提交
3947
	    ifmgd->associated) {
3948
		u8 bssid[ETH_ALEN];
3949
		int max_tries;
3950

3951
		memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3952

3953
		if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3954
			max_tries = max_nullfunc_tries;
3955
		else
3956
			max_tries = max_probe_tries;
3957

3958 3959 3960
		/* ACK received for nullfunc probing frame */
		if (!ifmgd->probe_send_count)
			ieee80211_reset_ap_probe(sdata);
3961 3962
		else if (ifmgd->nullfunc_failed) {
			if (ifmgd->probe_send_count < max_tries) {
J
Johannes Berg 已提交
3963 3964 3965 3966
				mlme_dbg(sdata,
					 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
					 bssid, ifmgd->probe_send_count,
					 max_tries);
3967 3968
				ieee80211_mgd_probe_ap_send(sdata);
			} else {
J
Johannes Berg 已提交
3969 3970 3971
				mlme_dbg(sdata,
					 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
					 bssid);
3972
				ieee80211_sta_connection_lost(sdata, bssid,
3973 3974
					WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
					false);
3975 3976
			}
		} else if (time_is_after_jiffies(ifmgd->probe_timeout))
3977
			run_again(sdata, ifmgd->probe_timeout);
3978
		else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
J
Johannes Berg 已提交
3979 3980 3981
			mlme_dbg(sdata,
				 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
				 bssid, probe_wait_ms);
3982
			ieee80211_sta_connection_lost(sdata, bssid,
3983
				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3984
		} else if (ifmgd->probe_send_count < max_tries) {
J
Johannes Berg 已提交
3985 3986 3987 3988
			mlme_dbg(sdata,
				 "No probe response from AP %pM after %dms, try %d/%i\n",
				 bssid, probe_wait_ms,
				 ifmgd->probe_send_count, max_tries);
3989 3990
			ieee80211_mgd_probe_ap_send(sdata);
		} else {
J
Johannes Berg 已提交
3991 3992 3993 3994
			/*
			 * We actually lost the connection ... or did we?
			 * Let's make sure!
			 */
3995 3996 3997
			mlme_dbg(sdata,
				 "No probe response from AP %pM after %dms, disconnecting.\n",
				 bssid, probe_wait_ms);
3998

3999
			ieee80211_sta_connection_lost(sdata, bssid,
4000
				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
J
Johannes Berg 已提交
4001 4002 4003
		}
	}

4004
	sdata_unlock(sdata);
4005 4006
}

J
Johannes Berg 已提交
4007 4008 4009 4010
static void ieee80211_sta_bcn_mon_timer(unsigned long data)
{
	struct ieee80211_sub_if_data *sdata =
		(struct ieee80211_sub_if_data *) data;
4011
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
4012

4013
	if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
M
Michal Kazior 已提交
4014 4015
		return;

4016
	sdata->u.mgd.connection_loss = false;
4017 4018
	ieee80211_queue_work(&sdata->local->hw,
			     &sdata->u.mgd.beacon_connection_loss_work);
J
Johannes Berg 已提交
4019 4020 4021 4022 4023 4024 4025 4026 4027
}

static void ieee80211_sta_conn_mon_timer(unsigned long data)
{
	struct ieee80211_sub_if_data *sdata =
		(struct ieee80211_sub_if_data *) data;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_local *local = sdata->local;

4028
	if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
M
Michal Kazior 已提交
4029 4030
		return;

4031
	ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
J
Johannes Berg 已提交
4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042
}

static void ieee80211_sta_monitor_work(struct work_struct *work)
{
	struct ieee80211_sub_if_data *sdata =
		container_of(work, struct ieee80211_sub_if_data,
			     u.mgd.monitor_work);

	ieee80211_mgd_probe_ap(sdata, false);
}

J
Johannes Berg 已提交
4043 4044
static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
{
4045
	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4046
		__ieee80211_stop_poll(sdata);
4047

J
Johannes Berg 已提交
4048
		/* let's probe the connection once */
4049
		if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4050 4051
			ieee80211_queue_work(&sdata->local->hw,
					     &sdata->u.mgd.monitor_work);
4052
	}
J
Johannes Berg 已提交
4053
}
4054

4055
#ifdef CONFIG_PM
4056 4057 4058 4059 4060 4061 4062
void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];

	sdata_lock(sdata);

4063 4064 4065 4066 4067
	if (ifmgd->auth_data || ifmgd->assoc_data) {
		const u8 *bssid = ifmgd->auth_data ?
				ifmgd->auth_data->bss->bssid :
				ifmgd->assoc_data->bss->bssid;

4068
		/*
4069 4070 4071
		 * If we are trying to authenticate / associate while suspending,
		 * cfg80211 won't know and won't actually abort those attempts,
		 * thus we need to do that ourselves.
4072
		 */
4073
		ieee80211_send_deauth_disassoc(sdata, bssid,
4074 4075 4076
					       IEEE80211_STYPE_DEAUTH,
					       WLAN_REASON_DEAUTH_LEAVING,
					       false, frame_buf);
4077
		if (ifmgd->assoc_data)
4078
			ieee80211_destroy_assoc_data(sdata, false, true);
4079 4080
		if (ifmgd->auth_data)
			ieee80211_destroy_auth_data(sdata, false);
4081 4082 4083 4084
		cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
				      IEEE80211_DEAUTH_FRAME_LEN);
	}

4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112
	/* This is a bit of a hack - we should find a better and more generic
	 * solution to this. Normally when suspending, cfg80211 will in fact
	 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
	 * auth (not so important) or assoc (this is the problem) process.
	 *
	 * As a consequence, it can happen that we are in the process of both
	 * associating and suspending, and receive an association response
	 * after cfg80211 has checked if it needs to disconnect, but before
	 * we actually set the flag to drop incoming frames. This will then
	 * cause the workqueue flush to process the association response in
	 * the suspend, resulting in a successful association just before it
	 * tries to remove the interface from the driver, which now though
	 * has a channel context assigned ... this results in issues.
	 *
	 * To work around this (for now) simply deauth here again if we're
	 * now connected.
	 */
	if (ifmgd->associated && !sdata->local->wowlan) {
		u8 bssid[ETH_ALEN];
		struct cfg80211_deauth_request req = {
			.reason_code = WLAN_REASON_DEAUTH_LEAVING,
			.bssid = bssid,
		};

		memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
		ieee80211_mgd_deauth(sdata, &req);
	}

4113 4114 4115
	sdata_unlock(sdata);
}

4116 4117 4118 4119
void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

4120
	sdata_lock(sdata);
4121
	if (!ifmgd->associated) {
4122
		sdata_unlock(sdata);
4123 4124 4125 4126 4127 4128 4129 4130 4131 4132
		return;
	}

	if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
		sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
		mlme_dbg(sdata, "driver requested disconnect after resume\n");
		ieee80211_sta_connection_lost(sdata,
					      ifmgd->associated->bssid,
					      WLAN_REASON_UNSPECIFIED,
					      true);
4133
		sdata_unlock(sdata);
4134 4135
		return;
	}
4136
	sdata_unlock(sdata);
4137 4138 4139
}
#endif

J
Johannes Berg 已提交
4140 4141
/* interface setup */
void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4142
{
4143
	struct ieee80211_if_managed *ifmgd;
J
Johannes Berg 已提交
4144

4145
	ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
4146
	INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4147
	INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4148 4149
	INIT_WORK(&ifmgd->beacon_connection_loss_work,
		  ieee80211_beacon_connection_loss_work);
4150 4151
	INIT_WORK(&ifmgd->csa_connection_drop_work,
		  ieee80211_csa_connection_drop_work);
4152
	INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4153 4154
	INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
			  ieee80211_tdls_peer_del_work);
4155
	setup_timer(&ifmgd->timer, ieee80211_sta_timer,
S
Sujith 已提交
4156
		    (unsigned long) sdata);
J
Johannes Berg 已提交
4157 4158 4159 4160
	setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
		    (unsigned long) sdata);
	setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
		    (unsigned long) sdata);
4161
	setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
J
Johannes Berg 已提交
4162
		    (unsigned long) sdata);
4163 4164
	INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
			  ieee80211_sta_handle_tspec_ac_params_wk);
J
Johannes Berg 已提交
4165

4166
	ifmgd->flags = 0;
4167
	ifmgd->powersave = sdata->wdev.ps;
4168 4169
	ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
	ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
J
Janusz Dziedzic 已提交
4170
	ifmgd->p2p_noa_index = -1;
J
Johannes Berg 已提交
4171

4172
	if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4173 4174 4175
		ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
	else
		ifmgd->req_smps = IEEE80211_SMPS_OFF;
4176 4177 4178 4179 4180

	/* Setup TDLS data */
	spin_lock_init(&ifmgd->teardown_lock);
	ifmgd->teardown_skb = NULL;
	ifmgd->orig_teardown_skb = NULL;
4181 4182
}

4183 4184
/* scan finished notification */
void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
J
Johannes Berg 已提交
4185
{
4186
	struct ieee80211_sub_if_data *sdata;
J
Johannes Berg 已提交
4187

4188 4189
	/* Restart STA timers */
	rcu_read_lock();
4190 4191 4192 4193
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		if (ieee80211_sdata_running(sdata))
			ieee80211_restart_sta_timer(sdata);
	}
4194 4195
	rcu_read_unlock();
}
J
Johannes Berg 已提交
4196

J
Johannes Berg 已提交
4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208
static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
				     struct cfg80211_bss *cbss)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	const u8 *ht_cap_ie, *vht_cap_ie;
	const struct ieee80211_ht_cap *ht_cap;
	const struct ieee80211_vht_cap *vht_cap;
	u8 chains = 1;

	if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
		return chains;

4209
	ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
J
Johannes Berg 已提交
4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221
	if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
		ht_cap = (void *)(ht_cap_ie + 2);
		chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
		/*
		 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
		 *	 "Tx Unequal Modulation Supported" fields.
		 */
	}

	if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
		return chains;

4222
	vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
J
Johannes Berg 已提交
4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240
	if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
		u8 nss;
		u16 tx_mcs_map;

		vht_cap = (void *)(vht_cap_ie + 2);
		tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
		for (nss = 8; nss > 0; nss--) {
			if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
					IEEE80211_VHT_MCS_NOT_SUPPORTED)
				break;
		}
		/* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
		chains = max(chains, nss);
	}

	return chains;
}

4241 4242
static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
				  struct cfg80211_bss *cbss)
4243 4244 4245
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4246
	const struct ieee80211_ht_cap *ht_cap = NULL;
4247
	const struct ieee80211_ht_operation *ht_oper = NULL;
J
Johannes Berg 已提交
4248
	const struct ieee80211_vht_operation *vht_oper = NULL;
4249
	struct ieee80211_supported_band *sband;
4250
	struct cfg80211_chan_def chandef;
J
Johannes Berg 已提交
4251
	int ret;
4252 4253
	u32 i;
	bool have_80mhz;
4254

4255 4256
	sband = local->hw.wiphy->bands[cbss->channel->band];

J
Johannes Berg 已提交
4257 4258 4259 4260
	ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
			  IEEE80211_STA_DISABLE_80P80MHZ |
			  IEEE80211_STA_DISABLE_160MHZ);

4261 4262
	rcu_read_lock();

J
Johannes Berg 已提交
4263 4264
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
	    sband->ht_cap.ht_supported) {
4265
		const u8 *ht_oper_ie, *ht_cap_ie;
4266

4267
		ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4268 4269
		if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
			ht_oper = (void *)(ht_oper_ie + 2);
4270

4271 4272 4273 4274 4275
		ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
		if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
			ht_cap = (void *)(ht_cap_ie + 2);

		if (!ht_cap) {
4276 4277 4278
			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
			ht_oper = NULL;
		}
4279 4280
	}

J
Johannes Berg 已提交
4281 4282
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
	    sband->vht_cap.vht_supported) {
4283
		const u8 *vht_oper_ie, *vht_cap;
J
Johannes Berg 已提交
4284

4285 4286
		vht_oper_ie = ieee80211_bss_get_ie(cbss,
						   WLAN_EID_VHT_OPERATION);
J
Johannes Berg 已提交
4287 4288 4289 4290
		if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
			vht_oper = (void *)(vht_oper_ie + 2);
		if (vht_oper && !ht_oper) {
			vht_oper = NULL;
J
Johannes Berg 已提交
4291
			sdata_info(sdata,
J
Johannes Berg 已提交
4292
				   "AP advertised VHT without HT, disabling both\n");
4293 4294
			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4295
		}
4296 4297 4298 4299 4300 4301

		vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
		if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
			vht_oper = NULL;
		}
4302 4303
	}

4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317
	/* Allow VHT if at least one channel on the sband supports 80 MHz */
	have_80mhz = false;
	for (i = 0; i < sband->n_channels; i++) {
		if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
						IEEE80211_CHAN_NO_80MHZ))
			continue;

		have_80mhz = true;
		break;
	}

	if (!have_80mhz)
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;

J
Johannes Berg 已提交
4318 4319
	ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
						     cbss->channel,
4320
						     ht_cap, ht_oper, vht_oper,
4321
						     &chandef, false);
4322

J
Johannes Berg 已提交
4323 4324
	sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
				      local->rx_chains);
4325

4326 4327
	rcu_read_unlock();

4328 4329 4330
	/* will change later if needed */
	sdata->smps_mode = IEEE80211_SMPS_OFF;

4331
	mutex_lock(&local->mtx);
J
Johannes Berg 已提交
4332 4333 4334 4335 4336 4337 4338
	/*
	 * If this fails (possibly due to channel context sharing
	 * on incompatible channels, e.g. 80+80 and 160 sharing the
	 * same control channel) try to use a smaller bandwidth.
	 */
	ret = ieee80211_vif_use_channel(sdata, &chandef,
					IEEE80211_CHANCTX_SHARED);
4339 4340 4341 4342

	/* don't downgrade for 5 and 10 MHz channels, though. */
	if (chandef.width == NL80211_CHAN_WIDTH_5 ||
	    chandef.width == NL80211_CHAN_WIDTH_10)
4343
		goto out;
4344

4345
	while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4346
		ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4347 4348 4349
		ret = ieee80211_vif_use_channel(sdata, &chandef,
						IEEE80211_CHANCTX_SHARED);
	}
4350 4351
 out:
	mutex_unlock(&local->mtx);
J
Johannes Berg 已提交
4352
	return ret;
4353 4354 4355
}

static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4356 4357
				     struct cfg80211_bss *cbss, bool assoc,
				     bool override)
4358 4359 4360 4361 4362
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_bss *bss = (void *)cbss->priv;
	struct sta_info *new_sta = NULL;
4363
	struct ieee80211_supported_band *sband;
4364
	bool have_sta = false;
4365 4366
	int err;

4367 4368
	sband = local->hw.wiphy->bands[cbss->channel->band];

4369 4370 4371
	if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
		return -EINVAL;

4372 4373 4374 4375
	/* If a reconfig is happening, bail out */
	if (local->in_reconfig)
		return -EBUSY;

4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386
	if (assoc) {
		rcu_read_lock();
		have_sta = sta_info_get(sdata, cbss->bssid);
		rcu_read_unlock();
	}

	if (!have_sta) {
		new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
		if (!new_sta)
			return -ENOMEM;
	}
4387

4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400
	/*
	 * Set up the information for the new channel before setting the
	 * new channel. We can't - completely race-free - change the basic
	 * rates bitmap and the channel (sband) that it refers to, but if
	 * we set it up before we at least avoid calling into the driver's
	 * bss_info_changed() method with invalid information (since we do
	 * call that from changing the channel - only for IDLE and perhaps
	 * some others, but ...).
	 *
	 * So to avoid that, just set up all the new information before the
	 * channel, but tell the driver to apply it only afterwards, since
	 * it might need the new channel for that.
	 */
J
Johannes Berg 已提交
4401
	if (new_sta) {
4402 4403 4404
		u32 rates = 0, basic_rates = 0;
		bool have_higher_than_11mbit;
		int min_rate = INT_MAX, min_rate_index = -1;
J
Johannes Berg 已提交
4405
		const struct cfg80211_bss_ies *ies;
4406
		int shift = ieee80211_vif_get_shift(&sdata->vif);
4407 4408 4409 4410 4411

		ieee80211_get_rates(sband, bss->supp_rates,
				    bss->supp_rates_len,
				    &rates, &basic_rates,
				    &have_higher_than_11mbit,
4412
				    &min_rate, &min_rate_index,
4413
				    shift);
4414 4415 4416 4417 4418 4419 4420 4421 4422 4423

		/*
		 * This used to be a workaround for basic rates missing
		 * in the association response frame. Now that we no
		 * longer use the basic rates from there, it probably
		 * doesn't happen any more, but keep the workaround so
		 * in case some *other* APs are buggy in different ways
		 * we can connect -- with a warning.
		 */
		if (!basic_rates && min_rate_index >= 0) {
J
Johannes Berg 已提交
4424 4425
			sdata_info(sdata,
				   "No basic rates, using min rate instead\n");
4426 4427 4428
			basic_rates = BIT(min_rate_index);
		}

J
Johannes Berg 已提交
4429
		new_sta->sta.supp_rates[cbss->channel->band] = rates;
4430 4431 4432
		sdata->vif.bss_conf.basic_rates = basic_rates;

		/* cf. IEEE 802.11 9.2.12 */
4433
		if (cbss->channel->band == NL80211_BAND_2GHZ &&
4434 4435 4436 4437 4438 4439 4440
		    have_higher_than_11mbit)
			sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
		else
			sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;

		memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);

4441 4442
		/* set timing information */
		sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
J
Johannes Berg 已提交
4443
		rcu_read_lock();
4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456
		ies = rcu_dereference(cbss->beacon_ies);
		if (ies) {
			const u8 *tim_ie;

			sdata->vif.bss_conf.sync_tsf = ies->tsf;
			sdata->vif.bss_conf.sync_device_ts =
				bss->device_ts_beacon;
			tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
						  ies->data, ies->len);
			if (tim_ie && tim_ie[1] >= 2)
				sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
			else
				sdata->vif.bss_conf.sync_dtim_count = 0;
4457 4458
		} else if (!ieee80211_hw_check(&sdata->local->hw,
					       TIMING_BEACON_ONLY)) {
4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469
			ies = rcu_dereference(cbss->proberesp_ies);
			/* must be non-NULL since beacon IEs were NULL */
			sdata->vif.bss_conf.sync_tsf = ies->tsf;
			sdata->vif.bss_conf.sync_device_ts =
				bss->device_ts_presp;
			sdata->vif.bss_conf.sync_dtim_count = 0;
		} else {
			sdata->vif.bss_conf.sync_tsf = 0;
			sdata->vif.bss_conf.sync_device_ts = 0;
			sdata->vif.bss_conf.sync_dtim_count = 0;
		}
J
Johannes Berg 已提交
4470
		rcu_read_unlock();
4471
	}
4472

4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486
	if (new_sta || override) {
		err = ieee80211_prep_channel(sdata, cbss);
		if (err) {
			if (new_sta)
				sta_info_free(local, new_sta);
			return -EINVAL;
		}
	}

	if (new_sta) {
		/*
		 * tell driver about BSSID, basic rates and timing
		 * this was set up above, before setting the channel
		 */
4487
		ieee80211_bss_info_change_notify(sdata,
4488 4489
			BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
			BSS_CHANGED_BEACON_INT);
4490 4491

		if (assoc)
J
Johannes Berg 已提交
4492
			sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4493

J
Johannes Berg 已提交
4494 4495
		err = sta_info_insert(new_sta);
		new_sta = NULL;
4496
		if (err) {
J
Johannes Berg 已提交
4497 4498 4499
			sdata_info(sdata,
				   "failed to insert STA entry for the AP (error %d)\n",
				   err);
4500 4501 4502
			return err;
		}
	} else
4503
		WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4504

4505 4506 4507 4508
	/* Cancel scan to ensure that nothing interferes with connection */
	if (local->scanning)
		ieee80211_scan_cancel(local);

4509 4510 4511
	return 0;
}

4512 4513 4514
/* config hooks */
int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
		       struct cfg80211_auth_request *req)
J
Johannes Berg 已提交
4515
{
J
Johannes Berg 已提交
4516 4517 4518
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_mgd_auth_data *auth_data;
4519
	u16 auth_alg;
J
Johannes Berg 已提交
4520 4521 4522
	int err;

	/* prepare auth data structure */
J
Johannes Berg 已提交
4523

4524 4525 4526 4527 4528
	switch (req->auth_type) {
	case NL80211_AUTHTYPE_OPEN_SYSTEM:
		auth_alg = WLAN_AUTH_OPEN;
		break;
	case NL80211_AUTHTYPE_SHARED_KEY:
J
Johannes Berg 已提交
4529
		if (IS_ERR(local->wep_tx_tfm))
4530
			return -EOPNOTSUPP;
4531 4532 4533 4534 4535 4536 4537 4538
		auth_alg = WLAN_AUTH_SHARED_KEY;
		break;
	case NL80211_AUTHTYPE_FT:
		auth_alg = WLAN_AUTH_FT;
		break;
	case NL80211_AUTHTYPE_NETWORK_EAP:
		auth_alg = WLAN_AUTH_LEAP;
		break;
4539 4540 4541
	case NL80211_AUTHTYPE_SAE:
		auth_alg = WLAN_AUTH_SAE;
		break;
4542 4543 4544 4545 4546 4547 4548 4549 4550
	case NL80211_AUTHTYPE_FILS_SK:
		auth_alg = WLAN_AUTH_FILS_SK;
		break;
	case NL80211_AUTHTYPE_FILS_SK_PFS:
		auth_alg = WLAN_AUTH_FILS_SK_PFS;
		break;
	case NL80211_AUTHTYPE_FILS_PK:
		auth_alg = WLAN_AUTH_FILS_PK;
		break;
4551 4552
	default:
		return -EOPNOTSUPP;
J
Johannes Berg 已提交
4553
	}
4554

4555
	auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4556
			    req->ie_len, GFP_KERNEL);
J
Johannes Berg 已提交
4557
	if (!auth_data)
J
Johannes Berg 已提交
4558
		return -ENOMEM;
4559

J
Johannes Berg 已提交
4560
	auth_data->bss = req->bss;
4561

4562
	if (req->auth_data_len >= 4) {
4563 4564 4565 4566 4567 4568
		if (req->auth_type == NL80211_AUTHTYPE_SAE) {
			__le16 *pos = (__le16 *) req->auth_data;

			auth_data->sae_trans = le16_to_cpu(pos[0]);
			auth_data->sae_status = le16_to_cpu(pos[1]);
		}
4569 4570 4571
		memcpy(auth_data->data, req->auth_data + 4,
		       req->auth_data_len - 4);
		auth_data->data_len += req->auth_data_len - 4;
4572 4573
	}

4574
	if (req->ie && req->ie_len) {
4575 4576 4577
		memcpy(&auth_data->data[auth_data->data_len],
		       req->ie, req->ie_len);
		auth_data->data_len += req->ie_len;
J
Johannes Berg 已提交
4578
	}
4579

J
Johannes Berg 已提交
4580
	if (req->key && req->key_len) {
J
Johannes Berg 已提交
4581 4582 4583
		auth_data->key_len = req->key_len;
		auth_data->key_idx = req->key_idx;
		memcpy(auth_data->key, req->key, req->key_len);
J
Johannes Berg 已提交
4584 4585
	}

J
Johannes Berg 已提交
4586
	auth_data->algorithm = auth_alg;
J
Johannes Berg 已提交
4587

J
Johannes Berg 已提交
4588
	/* try to authenticate/probe */
4589

J
Johannes Berg 已提交
4590 4591 4592 4593
	if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
	    ifmgd->assoc_data) {
		err = -EBUSY;
		goto err_free;
4594 4595
	}

J
Johannes Berg 已提交
4596 4597
	if (ifmgd->auth_data)
		ieee80211_destroy_auth_data(sdata, false);
4598

J
Johannes Berg 已提交
4599 4600
	/* prep auth_data so we don't go into idle on disassoc */
	ifmgd->auth_data = auth_data;
J
Johannes Berg 已提交
4601

4602 4603 4604
	if (ifmgd->associated) {
		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];

4605 4606 4607
		sdata_info(sdata,
			   "disconnect from AP %pM for new auth to %pM\n",
			   ifmgd->associated->bssid, req->bss->bssid);
4608 4609 4610 4611
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       WLAN_REASON_UNSPECIFIED,
				       false, frame_buf);

4612 4613 4614
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    WLAN_REASON_UNSPECIFIED);
4615
	}
J
Johannes Berg 已提交
4616

J
Johannes Berg 已提交
4617
	sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4618

4619
	err = ieee80211_prep_connection(sdata, req->bss, false, false);
4620
	if (err)
J
Johannes Berg 已提交
4621
		goto err_clear;
J
Johannes Berg 已提交
4622

4623
	err = ieee80211_auth(sdata);
J
Johannes Berg 已提交
4624 4625 4626 4627 4628 4629
	if (err) {
		sta_info_destroy_addr(sdata, req->bss->bssid);
		goto err_clear;
	}

	/* hold our own reference */
4630
	cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4631
	return 0;
J
Johannes Berg 已提交
4632 4633

 err_clear:
4634
	eth_zero_addr(ifmgd->bssid);
4635
	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
J
Johannes Berg 已提交
4636
	ifmgd->auth_data = NULL;
4637 4638 4639
	mutex_lock(&sdata->local->mtx);
	ieee80211_vif_release_channel(sdata);
	mutex_unlock(&sdata->local->mtx);
J
Johannes Berg 已提交
4640 4641 4642
 err_free:
	kfree(auth_data);
	return err;
J
Johannes Berg 已提交
4643 4644
}

4645 4646
int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
			struct cfg80211_assoc_request *req)
4647
{
J
Johannes Berg 已提交
4648
	struct ieee80211_local *local = sdata->local;
4649
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4650
	struct ieee80211_bss *bss = (void *)req->bss->priv;
J
Johannes Berg 已提交
4651
	struct ieee80211_mgd_assoc_data *assoc_data;
4652
	const struct cfg80211_bss_ies *beacon_ies;
J
Johannes Berg 已提交
4653
	struct ieee80211_supported_band *sband;
4654
	const u8 *ssidie, *ht_ie, *vht_ie;
4655
	int i, err;
4656
	bool override = false;
4657

J
Johannes Berg 已提交
4658 4659 4660 4661
	assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
	if (!assoc_data)
		return -ENOMEM;

4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672
	rcu_read_lock();
	ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
	if (!ssidie) {
		rcu_read_unlock();
		kfree(assoc_data);
		return -EINVAL;
	}
	memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
	assoc_data->ssid_len = ssidie[1];
	rcu_read_unlock();

4673 4674 4675
	if (ifmgd->associated) {
		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];

4676 4677 4678
		sdata_info(sdata,
			   "disconnect from AP %pM for new assoc to %pM\n",
			   ifmgd->associated->bssid, req->bss->bssid);
4679 4680 4681 4682
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       WLAN_REASON_UNSPECIFIED,
				       false, frame_buf);

4683 4684 4685
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    WLAN_REASON_UNSPECIFIED);
4686
	}
J
Johannes Berg 已提交
4687 4688 4689 4690

	if (ifmgd->auth_data && !ifmgd->auth_data->done) {
		err = -EBUSY;
		goto err_free;
J
Johannes Berg 已提交
4691
	}
4692

J
Johannes Berg 已提交
4693 4694 4695 4696
	if (ifmgd->assoc_data) {
		err = -EBUSY;
		goto err_free;
	}
4697

J
Johannes Berg 已提交
4698 4699 4700 4701
	if (ifmgd->auth_data) {
		bool match;

		/* keep sta info, bssid if matching */
4702
		match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
J
Johannes Berg 已提交
4703
		ieee80211_destroy_auth_data(sdata, match);
4704 4705
	}

J
Johannes Berg 已提交
4706
	/* prepare assoc data */
4707

4708 4709
	ifmgd->beacon_crc_valid = false;

4710 4711 4712
	assoc_data->wmm = bss->wmm_used &&
			  (local->hw.queues >= IEEE80211_NUM_ACS);

J
Johannes Berg 已提交
4713 4714 4715 4716 4717 4718 4719
	/*
	 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
	 * We still associate in non-HT mode (11a/b/g) if any one of these
	 * ciphers is configured as pairwise.
	 * We can set this to true for non-11n hardware, that'll be checked
	 * separately along with the peer capabilities.
	 */
4720
	for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4721 4722
		if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4723
		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4724
			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4725
			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4726
			netdev_info(sdata->dev,
4727
				    "disabling HT/VHT due to WEP/TKIP use\n");
4728 4729
		}
	}
4730

J
Johannes Berg 已提交
4731 4732 4733
	/* Also disable HT if we don't support it or the AP doesn't use WMM */
	sband = local->hw.wiphy->bands[req->bss->channel->band];
	if (!sband->ht_cap.ht_supported ||
4734 4735
	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
	    ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4736
		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4737 4738
		if (!bss->wmm_used &&
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4739 4740
			netdev_info(sdata->dev,
				    "disabling HT as WMM/QoS is not supported by the AP\n");
4741
	}
J
Johannes Berg 已提交
4742

4743 4744
	/* disable VHT if we don't support it or the AP doesn't use WMM */
	if (!sband->vht_cap.vht_supported ||
4745 4746
	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
	    ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4747
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4748 4749
		if (!bss->wmm_used &&
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4750 4751
			netdev_info(sdata->dev,
				    "disabling VHT as WMM/QoS is not supported by the AP\n");
4752 4753
	}

B
Ben Greear 已提交
4754 4755 4756 4757
	memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
	memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
	       sizeof(ifmgd->ht_capa_mask));

4758 4759 4760 4761
	memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
	memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
	       sizeof(ifmgd->vht_capa_mask));

4762
	if (req->ie && req->ie_len) {
J
Johannes Berg 已提交
4763 4764 4765
		memcpy(assoc_data->ie, req->ie, req->ie_len);
		assoc_data->ie_len = req->ie_len;
	}
4766

4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781
	if (req->fils_kek) {
		/* should already be checked in cfg80211 - so warn */
		if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
			err = -EINVAL;
			goto err_free;
		}
		memcpy(assoc_data->fils_kek, req->fils_kek,
		       req->fils_kek_len);
		assoc_data->fils_kek_len = req->fils_kek_len;
	}

	if (req->fils_nonces)
		memcpy(assoc_data->fils_nonces, req->fils_nonces,
		       2 * FILS_NONCE_LEN);

J
Johannes Berg 已提交
4782
	assoc_data->bss = req->bss;
4783

J
Johannes Berg 已提交
4784 4785
	if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
		if (ifmgd->powersave)
4786
			sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
J
Johannes Berg 已提交
4787
		else
4788
			sdata->smps_mode = IEEE80211_SMPS_OFF;
J
Johannes Berg 已提交
4789
	} else
4790
		sdata->smps_mode = ifmgd->req_smps;
J
Johannes Berg 已提交
4791

J
Johannes Berg 已提交
4792 4793 4794
	assoc_data->capability = req->bss->capability;
	assoc_data->supp_rates = bss->supp_rates;
	assoc_data->supp_rates_len = bss->supp_rates_len;
4795

4796
	rcu_read_lock();
4797 4798 4799 4800 4801
	ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
	if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
		assoc_data->ap_ht_param =
			((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
	else
4802
		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4803 4804 4805 4806 4807 4808
	vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
	if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
		memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
		       sizeof(struct ieee80211_vht_cap));
	else
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4809
	rcu_read_unlock();
4810

4811
	if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4812
		 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4813 4814 4815
	     "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
		sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;

K
Kalle Valo 已提交
4816
	if (bss->wmm_used && bss->uapsd_supported &&
4817
	    (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4818
		assoc_data->uapsd = true;
K
Kalle Valo 已提交
4819 4820
		ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
	} else {
4821
		assoc_data->uapsd = false;
K
Kalle Valo 已提交
4822 4823 4824
		ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
	}

4825
	if (req->prev_bssid)
J
Johannes Berg 已提交
4826
		memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4827 4828 4829 4830 4831 4832 4833 4834 4835

	if (req->use_mfp) {
		ifmgd->mfp = IEEE80211_MFP_REQUIRED;
		ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
	} else {
		ifmgd->mfp = IEEE80211_MFP_DISABLED;
		ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
	}

4836 4837 4838 4839 4840
	if (req->flags & ASSOC_REQ_USE_RRM)
		ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
	else
		ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;

4841 4842 4843 4844 4845
	if (req->crypto.control_port)
		ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
	else
		ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;

4846 4847
	sdata->control_port_protocol = req->crypto.control_port_ethertype;
	sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4848 4849
	sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
							sdata->vif.type);
4850

J
Johannes Berg 已提交
4851 4852 4853
	/* kick off associate process */

	ifmgd->assoc_data = assoc_data;
4854
	ifmgd->dtim_period = 0;
4855
	ifmgd->have_beacon = false;
J
Johannes Berg 已提交
4856

4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886
	/* override HT/VHT configuration only if the AP and we support it */
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
		struct ieee80211_sta_ht_cap sta_ht_cap;

		if (req->flags & ASSOC_REQ_DISABLE_HT)
			override = true;

		memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
		ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);

		/* check for 40 MHz disable override */
		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
		    sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
		    !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
			override = true;

		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
		    req->flags & ASSOC_REQ_DISABLE_VHT)
			override = true;
	}

	if (req->flags & ASSOC_REQ_DISABLE_HT) {
		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
	}

	if (req->flags & ASSOC_REQ_DISABLE_VHT)
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;

	err = ieee80211_prep_connection(sdata, req->bss, true, override);
4887 4888
	if (err)
		goto err_clear;
J
Johannes Berg 已提交
4889

4890 4891
	rcu_read_lock();
	beacon_ies = rcu_dereference(req->bss->beacon_ies);
4892

4893
	if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4894 4895 4896 4897 4898 4899 4900 4901
	    !beacon_ies) {
		/*
		 * Wait up to one beacon interval ...
		 * should this be more if we miss one?
		 */
		sdata_info(sdata, "waiting for beacon from %pM\n",
			   ifmgd->bssid);
		assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4902
		assoc_data->timeout_started = true;
4903 4904 4905 4906 4907
		assoc_data->need_beacon = true;
	} else if (beacon_ies) {
		const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
						    beacon_ies->data,
						    beacon_ies->len);
4908 4909
		u8 dtim_count = 0;

4910 4911 4912 4913
		if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
			const struct ieee80211_tim_ie *tim;
			tim = (void *)(tim_ie + 2);
			ifmgd->dtim_period = tim->dtim_period;
4914
			dtim_count = tim->dtim_count;
4915
		}
4916
		ifmgd->have_beacon = true;
J
Johannes Berg 已提交
4917
		assoc_data->timeout = jiffies;
4918
		assoc_data->timeout_started = true;
4919

4920
		if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4921 4922 4923 4924 4925
			sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
			sdata->vif.bss_conf.sync_device_ts =
				bss->device_ts_beacon;
			sdata->vif.bss_conf.sync_dtim_count = dtim_count;
		}
4926 4927
	} else {
		assoc_data->timeout = jiffies;
4928
		assoc_data->timeout_started = true;
J
Johannes Berg 已提交
4929
	}
4930 4931
	rcu_read_unlock();

4932
	run_again(sdata, assoc_data->timeout);
J
Johannes Berg 已提交
4933

P
Paul Stewart 已提交
4934 4935 4936 4937 4938 4939 4940 4941 4942 4943
	if (bss->corrupt_data) {
		char *corrupt_type = "data";
		if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
			if (bss->corrupt_data &
					IEEE80211_BSS_CORRUPT_PROBE_RESP)
				corrupt_type = "beacon and probe response";
			else
				corrupt_type = "beacon";
		} else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
			corrupt_type = "probe response";
J
Johannes Berg 已提交
4944 4945
		sdata_info(sdata, "associating with AP with corrupt %s\n",
			   corrupt_type);
P
Paul Stewart 已提交
4946 4947
	}

4948
	return 0;
J
Johannes Berg 已提交
4949
 err_clear:
4950
	eth_zero_addr(ifmgd->bssid);
4951
	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
J
Johannes Berg 已提交
4952 4953 4954 4955
	ifmgd->assoc_data = NULL;
 err_free:
	kfree(assoc_data);
	return err;
4956 4957
}

4958
int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4959
			 struct cfg80211_deauth_request *req)
4960
{
4961
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4962
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4963
	bool tx = !req->local_state_change;
4964

4965 4966 4967 4968 4969 4970
	if (ifmgd->auth_data &&
	    ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
		sdata_info(sdata,
			   "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
			   req->bssid, req->reason_code,
			   ieee80211_get_reason_code_string(req->reason_code));
4971

4972
		drv_mgd_prepare_tx(sdata->local, sdata);
4973 4974
		ieee80211_send_deauth_disassoc(sdata, req->bssid,
					       IEEE80211_STYPE_DEAUTH,
4975
					       req->reason_code, tx,
4976
					       frame_buf);
4977
		ieee80211_destroy_auth_data(sdata, false);
4978 4979 4980
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    req->reason_code);
4981

4982
		return 0;
4983 4984
	}

4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995 4996
	if (ifmgd->assoc_data &&
	    ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
		sdata_info(sdata,
			   "aborting association with %pM by local choice (Reason: %u=%s)\n",
			   req->bssid, req->reason_code,
			   ieee80211_get_reason_code_string(req->reason_code));

		drv_mgd_prepare_tx(sdata->local, sdata);
		ieee80211_send_deauth_disassoc(sdata, req->bssid,
					       IEEE80211_STYPE_DEAUTH,
					       req->reason_code, tx,
					       frame_buf);
4997
		ieee80211_destroy_assoc_data(sdata, false, true);
4998 4999 5000 5001 5002 5003
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    req->reason_code);
		return 0;
	}

5004 5005
	if (ifmgd->associated &&
	    ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5006 5007 5008 5009 5010
		sdata_info(sdata,
			   "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
			   req->bssid, req->reason_code,
			   ieee80211_get_reason_code_string(req->reason_code));

5011 5012
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       req->reason_code, tx, frame_buf);
5013 5014 5015
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    req->reason_code);
5016 5017
		return 0;
	}
5018

5019
	return -ENOTCONN;
5020
}
5021

5022
int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5023
			   struct cfg80211_disassoc_request *req)
J
Johannes Berg 已提交
5024
{
5025
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5026
	u8 bssid[ETH_ALEN];
5027
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
J
Johannes Berg 已提交
5028

J
Johannes Berg 已提交
5029 5030 5031 5032 5033 5034
	/*
	 * cfg80211 should catch this ... but it's racy since
	 * we can receive a disassoc frame, process it, hand it
	 * to cfg80211 while that's in a locked section already
	 * trying to tell us that the user wants to disconnect.
	 */
5035
	if (ifmgd->associated != req->bss)
5036 5037
		return -ENOLINK;

J
Johannes Berg 已提交
5038
	sdata_info(sdata,
5039 5040
		   "disassociating from %pM by local choice (Reason: %u=%s)\n",
		   req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5041

5042
	memcpy(bssid, req->bss->bssid, ETH_ALEN);
5043 5044 5045
	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
			       req->reason_code, !req->local_state_change,
			       frame_buf);
5046

5047 5048
	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
				    req->reason_code);
5049

5050 5051
	return 0;
}
5052

5053
void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5054 5055 5056
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

5057 5058 5059 5060 5061 5062 5063 5064 5065 5066
	/*
	 * Make sure some work items will not run after this,
	 * they will not do anything but might not have been
	 * cancelled when disconnecting.
	 */
	cancel_work_sync(&ifmgd->monitor_work);
	cancel_work_sync(&ifmgd->beacon_connection_loss_work);
	cancel_work_sync(&ifmgd->request_smps_work);
	cancel_work_sync(&ifmgd->csa_connection_drop_work);
	cancel_work_sync(&ifmgd->chswitch_work);
5067
	cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5068

5069
	sdata_lock(sdata);
5070 5071
	if (ifmgd->assoc_data) {
		struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5072
		ieee80211_destroy_assoc_data(sdata, false, false);
5073 5074
		cfg80211_assoc_timeout(sdata->dev, bss);
	}
5075 5076
	if (ifmgd->auth_data)
		ieee80211_destroy_auth_data(sdata, false);
5077 5078 5079 5080 5081 5082 5083
	spin_lock_bh(&ifmgd->teardown_lock);
	if (ifmgd->teardown_skb) {
		kfree_skb(ifmgd->teardown_skb);
		ifmgd->teardown_skb = NULL;
		ifmgd->orig_teardown_skb = NULL;
	}
	spin_unlock_bh(&ifmgd->teardown_lock);
5084
	del_timer_sync(&ifmgd->timer);
5085
	sdata_unlock(sdata);
5086 5087
}

5088 5089
void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
			       enum nl80211_cqm_rssi_threshold_event rssi_event,
5090
			       s32 rssi_level,
5091 5092 5093 5094
			       gfp_t gfp)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

5095
	trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
J
Johannes Berg 已提交
5096

5097
	cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5098 5099
}
EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5100 5101 5102 5103 5104 5105 5106 5107 5108 5109

void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

	trace_api_cqm_beacon_loss_notify(sdata->local, sdata);

	cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
}
EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);