1/*
   2 * BSS client mode implementation
   3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4 * Copyright 2004, Instant802 Networks, Inc.
   5 * Copyright 2005, Devicescape Software, Inc.
   6 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
   7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8 * Copyright 2013-2014  Intel Mobile Communications GmbH
   9 * Copyright (C) 2015 - 2016 Intel Deutschland GmbH
 
  10 *
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of the GNU General Public License version 2 as
  13 * published by the Free Software Foundation.
  14 */
  15
  16#include <linux/delay.h>
  17#include <linux/if_ether.h>
  18#include <linux/skbuff.h>
  19#include <linux/if_arp.h>
  20#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>
  28
  29#include "ieee80211_i.h"
  30#include "driver-ops.h"
  31#include "rate.h"
  32#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#define IEEE80211_AUTH_TIMEOUT_SHORT	(HZ / 10)
 
  38#define IEEE80211_AUTH_MAX_TRIES	3
  39#define IEEE80211_AUTH_WAIT_ASSOC	(HZ * 5)
  40#define IEEE80211_ASSOC_TIMEOUT		(HZ / 5)
  41#define IEEE80211_ASSOC_TIMEOUT_LONG	(HZ / 2)
  42#define IEEE80211_ASSOC_TIMEOUT_SHORT	(HZ / 10)
  43#define IEEE80211_ASSOC_MAX_TRIES	3
  44
  45static int max_nullfunc_tries = 2;
  46module_param(max_nullfunc_tries, int, 0644);
  47MODULE_PARM_DESC(max_nullfunc_tries,
  48		 "Maximum nullfunc tx tries before disconnecting (reason 4).");
  49
  50static int max_probe_tries = 5;
  51module_param(max_probe_tries, int, 0644);
  52MODULE_PARM_DESC(max_probe_tries,
  53		 "Maximum probe tries before disconnecting (reason 4).");
  54
  55/*
  56 * Beacon loss timeout is calculated as N frames times the
  57 * advertised beacon interval.  This may need to be somewhat
  58 * higher than what hardware might detect to account for
  59 * delays in the host processing frames. But since we also
  60 * probe on beacon miss before declaring the connection lost
  61 * default to what we want.
  62 */
  63static int beacon_loss_count = 7;
  64module_param(beacon_loss_count, int, 0644);
  65MODULE_PARM_DESC(beacon_loss_count,
  66		 "Number of beacon intervals before we decide beacon was lost.");
  67
  68/*
  69 * Time the connection can be idle before we probe
  70 * it to see if we can still talk to the AP.
  71 */
  72#define IEEE80211_CONNECTION_IDLE_TIME	(30 * HZ)
  73/*
  74 * Time we wait for a probe response after sending
  75 * a probe request because of beacon loss or for
  76 * checking the connection still works.
  77 */
  78static int probe_wait_ms = 500;
  79module_param(probe_wait_ms, int, 0644);
  80MODULE_PARM_DESC(probe_wait_ms,
  81		 "Maximum time(ms) to wait for probe response"
  82		 " before disconnecting (reason 4).");
  83
  84/*
  85 * How many Beacon frames need to have been used in average signal strength
  86 * before starting to indicate signal change events.
  87 */
  88#define IEEE80211_SIGNAL_AVE_MIN_COUNT	4
  89
  90/*
  91 * We can have multiple work items (and connection probing)
  92 * scheduling this timer, but we need to take care to only
  93 * reschedule it when it should fire _earlier_ than it was
  94 * asked for before, or if it's not pending right now. This
  95 * function ensures that. Note that it then is required to
  96 * run this function for all timeouts after the first one
  97 * has happened -- the work that runs from this timer will
  98 * do that.
  99 */
 100static void run_again(struct ieee80211_sub_if_data *sdata,
 101		      unsigned long timeout)
 102{
 103	sdata_assert_lock(sdata);
 104
 105	if (!timer_pending(&sdata->u.mgd.timer) ||
 106	    time_before(timeout, sdata->u.mgd.timer.expires))
 107		mod_timer(&sdata->u.mgd.timer, timeout);
 108}
 109
 110void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 111{
 112	if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 113		return;
 114
 115	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 116		return;
 117
 118	mod_timer(&sdata->u.mgd.bcn_mon_timer,
 119		  round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 120}
 121
 122void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 123{
 124	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 125
 126	if (unlikely(!ifmgd->associated))
 127		return;
 128
 129	if (ifmgd->probe_send_count)
 130		ifmgd->probe_send_count = 0;
 131
 132	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 133		return;
 134
 135	mod_timer(&ifmgd->conn_mon_timer,
 136		  round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 137}
 138
 139static int ecw2cw(int ecw)
 140{
 141	return (1 << ecw) - 1;
 142}
 143
 144static u32
 145ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 146			     struct ieee80211_supported_band *sband,
 147			     struct ieee80211_channel *channel,
 148			     const struct ieee80211_ht_cap *ht_cap,
 149			     const struct ieee80211_ht_operation *ht_oper,
 150			     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	u32 ht_cfreq, ret;
 157
 158	memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 159	ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 160
 161	chandef->chan = channel;
 162	chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 163	chandef->center_freq1 = channel->center_freq;
 164	chandef->center_freq2 = 0;
 165
 166	if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
 167		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 168		goto out;
 169	}
 170
 171	chandef->width = NL80211_CHAN_WIDTH_20;
 172
 173	if (!(ht_cap->cap_info &
 174	      cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
 175		ret = IEEE80211_STA_DISABLE_40MHZ;
 176		vht_chandef = *chandef;
 177		goto out;
 178	}
 179
 180	ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 181						  channel->band);
 182	/* check that channel matches the right operating channel */
 183	if (!tracking && channel->center_freq != ht_cfreq) {
 184		/*
 185		 * It's possible that some APs are confused here;
 186		 * Netgear WNDR3700 sometimes reports 4 higher than
 187		 * the actual channel in association responses, but
 188		 * since we look at probe response/beacon data here
 189		 * it should be OK.
 190		 */
 191		sdata_info(sdata,
 192			   "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 193			   channel->center_freq, ht_cfreq,
 194			   ht_oper->primary_chan, channel->band);
 195		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 196		goto out;
 197	}
 198
 199	/* 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	} else {
 203		/* 40 MHz (and 80 MHz) must be supported for VHT */
 204		ret = IEEE80211_STA_DISABLE_VHT;
 205		/* also mark 40 MHz disabled */
 206		ret |= IEEE80211_STA_DISABLE_40MHZ;
 207		goto out;
 208	}
 209
 210	if (!vht_oper || !sband->vht_cap.vht_supported) {
 211		ret = IEEE80211_STA_DISABLE_VHT;
 212		goto out;
 213	}
 214
 215	vht_chandef = *chandef;
 216	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		ret = IEEE80211_STA_DISABLE_VHT;
 221		goto out;
 222	}
 223
 224	if (!cfg80211_chandef_valid(&vht_chandef)) {
 225		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 226			sdata_info(sdata,
 227				   "AP VHT information is invalid, disable VHT\n");
 228		ret = IEEE80211_STA_DISABLE_VHT;
 229		goto out;
 230	}
 231
 232	if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 233		ret = 0;
 234		goto out;
 235	}
 236
 237	if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 238		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 239			sdata_info(sdata,
 240				   "AP VHT information doesn't match HT, disable VHT\n");
 241		ret = IEEE80211_STA_DISABLE_VHT;
 242		goto out;
 243	}
 244
 245	*chandef = vht_chandef;
 246
 247	ret = 0;
 248
 249out:
 250	/*
 251	 * When tracking the current AP, don't do any further checks if the
 252	 * new chandef is identical to the one we're currently using for the
 253	 * connection. This keeps us from playing ping-pong with regulatory,
 254	 * without it the following can happen (for example):
 255	 *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 256	 *  - AP advertises regdom US
 257	 *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 258	 *  - the code below detects an unsupported channel, downgrades, and
 259	 *    we disconnect from the AP in the caller
 260	 *  - disconnect causes CRDA to reload world regdomain and the game
 261	 *    starts anew.
 262	 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 263	 *
 264	 * It seems possible that there are still scenarios with CSA or real
 265	 * bandwidth changes where a this could happen, but those cases are
 266	 * less common and wouldn't completely prevent using the AP.
 267	 */
 268	if (tracking &&
 269	    cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 270		return ret;
 271
 272	/* don't print the message below for VHT mismatch if VHT is disabled */
 273	if (ret & IEEE80211_STA_DISABLE_VHT)
 274		vht_chandef = *chandef;
 275
 276	/*
 277	 * Ignore the DISABLED flag when we're already connected and only
 278	 * tracking the APs beacon for bandwidth changes - otherwise we
 279	 * might get disconnected here if we connect to an AP, update our
 280	 * regulatory information based on the AP's country IE and the
 281	 * information we have is wrong/outdated and disables the channel
 282	 * that we're actually using for the connection to the AP.
 283	 */
 284	while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 285					tracking ? 0 :
 286						   IEEE80211_CHAN_DISABLED)) {
 287		if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 288			ret = IEEE80211_STA_DISABLE_HT |
 289			      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		sdata_info(sdata,
 298			   "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 299
 300	WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 301	return ret;
 302}
 303
 304static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 305			       struct sta_info *sta,
 306			       const struct ieee80211_ht_cap *ht_cap,
 307			       const struct ieee80211_ht_operation *ht_oper,
 308			       const struct ieee80211_vht_operation *vht_oper,
 309			       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;
 314	struct ieee80211_channel *chan;
 315	struct cfg80211_chan_def chandef;
 316	u16 ht_opmode;
 317	u32 flags;
 318	enum ieee80211_sta_rx_bandwidth new_sta_bw;
 319	int ret;
 320
 321	/* if HT was/is disabled, don't track any bandwidth changes */
 322	if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 323		return 0;
 324
 325	/* don't check VHT if we associated as non-VHT station */
 326	if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 327		vht_oper = NULL;
 328
 329	if (WARN_ON_ONCE(!sta))
 330		return -EINVAL;
 331
 332	/*
 333	 * if bss configuration changed store the new one -
 334	 * this may be applicable even if channel is identical
 335	 */
 336	ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 337	if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 338		*changed |= BSS_CHANGED_HT;
 339		sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 340	}
 341
 342	chan = sdata->vif.bss_conf.chandef.chan;
 343	sband = local->hw.wiphy->bands[chan->band];
 344
 345	/* calculate new channel (type) based on HT/VHT operation IEs */
 346	flags = ieee80211_determine_chantype(sdata, sband, chan,
 347					     ht_cap, ht_oper, vht_oper,
 348					     &chandef, true);
 349
 350	/*
 351	 * Downgrade the new channel if we associated with restricted
 352	 * capabilities. For example, if we associated as a 20 MHz STA
 353	 * to a 40 MHz AP (due to regulatory, capabilities or config
 354	 * reasons) then switching to a 40 MHz channel now won't do us
 355	 * any good -- we couldn't use it with the AP.
 356	 */
 357	if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 358	    chandef.width == NL80211_CHAN_WIDTH_80P80)
 359		flags |= ieee80211_chandef_downgrade(&chandef);
 360	if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 361	    chandef.width == NL80211_CHAN_WIDTH_160)
 362		flags |= ieee80211_chandef_downgrade(&chandef);
 363	if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 364	    chandef.width > NL80211_CHAN_WIDTH_20)
 365		flags |= ieee80211_chandef_downgrade(&chandef);
 366
 367	if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 368		return 0;
 369
 370	sdata_info(sdata,
 371		   "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 372		   ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 373		   chandef.center_freq1, chandef.center_freq2);
 374
 375	if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 376				      IEEE80211_STA_DISABLE_VHT |
 377				      IEEE80211_STA_DISABLE_40MHZ |
 378				      IEEE80211_STA_DISABLE_80P80MHZ |
 379				      IEEE80211_STA_DISABLE_160MHZ)) ||
 380	    !cfg80211_chandef_valid(&chandef)) {
 381		sdata_info(sdata,
 382			   "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 383			   ifmgd->bssid);
 384		return -EINVAL;
 385	}
 386
 387	switch (chandef.width) {
 388	case NL80211_CHAN_WIDTH_20_NOHT:
 389	case NL80211_CHAN_WIDTH_20:
 390		new_sta_bw = IEEE80211_STA_RX_BW_20;
 391		break;
 392	case NL80211_CHAN_WIDTH_40:
 393		new_sta_bw = IEEE80211_STA_RX_BW_40;
 394		break;
 395	case NL80211_CHAN_WIDTH_80:
 396		new_sta_bw = IEEE80211_STA_RX_BW_80;
 397		break;
 398	case NL80211_CHAN_WIDTH_80P80:
 399	case NL80211_CHAN_WIDTH_160:
 400		new_sta_bw = IEEE80211_STA_RX_BW_160;
 401		break;
 402	default:
 403		return -EINVAL;
 404	}
 405
 406	if (new_sta_bw > sta->cur_max_bandwidth)
 407		new_sta_bw = sta->cur_max_bandwidth;
 408
 409	if (new_sta_bw < sta->sta.bandwidth) {
 410		sta->sta.bandwidth = new_sta_bw;
 411		rate_control_rate_update(local, sband, sta,
 412					 IEEE80211_RC_BW_CHANGED);
 413	}
 414
 415	ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 416	if (ret) {
 417		sdata_info(sdata,
 418			   "AP %pM changed bandwidth to incompatible one - disconnect\n",
 419			   ifmgd->bssid);
 420		return ret;
 421	}
 422
 423	if (new_sta_bw > sta->sta.bandwidth) {
 424		sta->sta.bandwidth = new_sta_bw;
 425		rate_control_rate_update(local, sband, sta,
 426					 IEEE80211_RC_BW_CHANGED);
 427	}
 428
 429	return 0;
 430}
 431
 432/* frame sending functions */
 433
 434static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 435				struct sk_buff *skb, u8 ap_ht_param,
 436				struct ieee80211_supported_band *sband,
 437				struct ieee80211_channel *channel,
 438				enum ieee80211_smps_mode smps)
 439{
 440	u8 *pos;
 441	u32 flags = channel->flags;
 442	u16 cap;
 443	struct ieee80211_sta_ht_cap ht_cap;
 444
 445	BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 446
 447	memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 448	ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 449
 450	/* determine capability flags */
 451	cap = ht_cap.cap;
 452
 453	switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 454	case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 455		if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 456			cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 457			cap &= ~IEEE80211_HT_CAP_SGI_40;
 458		}
 459		break;
 460	case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 461		if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 462			cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 463			cap &= ~IEEE80211_HT_CAP_SGI_40;
 464		}
 465		break;
 466	}
 467
 468	/*
 469	 * If 40 MHz was disabled associate as though we weren't
 470	 * capable of 40 MHz -- some broken APs will never fall
 471	 * back to trying to transmit in 20 MHz.
 472	 */
 473	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 474		cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 475		cap &= ~IEEE80211_HT_CAP_SGI_40;
 476	}
 477
 478	/* set SM PS mode properly */
 479	cap &= ~IEEE80211_HT_CAP_SM_PS;
 480	switch (smps) {
 481	case IEEE80211_SMPS_AUTOMATIC:
 482	case IEEE80211_SMPS_NUM_MODES:
 483		WARN_ON(1);
 
 484	case IEEE80211_SMPS_OFF:
 485		cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 486			IEEE80211_HT_CAP_SM_PS_SHIFT;
 487		break;
 488	case IEEE80211_SMPS_STATIC:
 489		cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 490			IEEE80211_HT_CAP_SM_PS_SHIFT;
 491		break;
 492	case IEEE80211_SMPS_DYNAMIC:
 493		cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 494			IEEE80211_HT_CAP_SM_PS_SHIFT;
 495		break;
 496	}
 497
 498	/* reserve and fill IE */
 499	pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 500	ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 501}
 502
 503/* This function determines vht capability flags for the association
 504 * and builds the IE.
 505 * Note - the function may set the owner of the MU-MIMO capability
 506 */
 507static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 508				 struct sk_buff *skb,
 509				 struct ieee80211_supported_band *sband,
 510				 struct ieee80211_vht_cap *ap_vht_cap)
 511{
 512	struct ieee80211_local *local = sdata->local;
 513	u8 *pos;
 514	u32 cap;
 515	struct ieee80211_sta_vht_cap vht_cap;
 516	u32 mask, ap_bf_sts, our_bf_sts;
 517
 518	BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 519
 520	memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 521	ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 522
 523	/* determine capability flags */
 524	cap = vht_cap.cap;
 525
 526	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 527		u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 528
 529		cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 530		if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 531		    bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 532			cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 533	}
 534
 535	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 536		cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 537		cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 538	}
 539
 540	/*
 541	 * Some APs apparently get confused if our capabilities are better
 542	 * than theirs, so restrict what we advertise in the assoc request.
 543	 */
 544	if (!(ap_vht_cap->vht_cap_info &
 545			cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 546		cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 547			 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 548	else if (!(ap_vht_cap->vht_cap_info &
 549			cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 550		cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 551
 552	/*
 553	 * If some other vif is using the MU-MIMO capablity we cannot associate
 554	 * using MU-MIMO - this will lead to contradictions in the group-id
 555	 * mechanism.
 556	 * Ownership is defined since association request, in order to avoid
 557	 * simultaneous associations with MU-MIMO.
 558	 */
 559	if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 560		bool disable_mu_mimo = false;
 561		struct ieee80211_sub_if_data *other;
 562
 563		list_for_each_entry_rcu(other, &local->interfaces, list) {
 564			if (other->vif.mu_mimo_owner) {
 565				disable_mu_mimo = true;
 566				break;
 567			}
 568		}
 569		if (disable_mu_mimo)
 570			cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 571		else
 572			sdata->vif.mu_mimo_owner = true;
 573	}
 574
 575	mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 576
 577	ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 578	our_bf_sts = cap & mask;
 579
 580	if (ap_bf_sts < our_bf_sts) {
 581		cap &= ~mask;
 582		cap |= ap_bf_sts;
 583	}
 584
 585	/* reserve and fill IE */
 586	pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 587	ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 588}
 589
 590static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 591{
 592	struct ieee80211_local *local = sdata->local;
 593	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 594	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 595	struct sk_buff *skb;
 596	struct ieee80211_mgmt *mgmt;
 597	u8 *pos, qos_info;
 598	size_t offset = 0, noffset;
 599	int i, count, rates_len, supp_rates_len, shift;
 600	u16 capab;
 601	struct ieee80211_supported_band *sband;
 602	struct ieee80211_chanctx_conf *chanctx_conf;
 603	struct ieee80211_channel *chan;
 604	u32 rate_flags, rates = 0;
 605
 606	sdata_assert_lock(sdata);
 607
 608	rcu_read_lock();
 609	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 610	if (WARN_ON(!chanctx_conf)) {
 611		rcu_read_unlock();
 612		return;
 613	}
 614	chan = chanctx_conf->def.chan;
 615	rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 616	rcu_read_unlock();
 617	sband = local->hw.wiphy->bands[chan->band];
 618	shift = ieee80211_vif_get_shift(&sdata->vif);
 619
 620	if (assoc_data->supp_rates_len) {
 621		/*
 622		 * Get all rates supported by the device and the AP as
 623		 * some APs don't like getting a superset of their rates
 624		 * in the association request (e.g. D-Link DAP 1353 in
 625		 * b-only mode)...
 626		 */
 627		rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 628						     assoc_data->supp_rates,
 629						     assoc_data->supp_rates_len,
 630						     &rates);
 631	} else {
 632		/*
 633		 * In case AP not provide any supported rates information
 634		 * before association, we send information element(s) with
 635		 * all rates that we support.
 636		 */
 637		rates_len = 0;
 638		for (i = 0; i < sband->n_bitrates; i++) {
 639			if ((rate_flags & sband->bitrates[i].flags)
 640			    != rate_flags)
 641				continue;
 642			rates |= BIT(i);
 643			rates_len++;
 644		}
 645	}
 646
 647	skb = alloc_skb(local->hw.extra_tx_headroom +
 648			sizeof(*mgmt) + /* bit too much but doesn't matter */
 649			2 + assoc_data->ssid_len + /* SSID */
 650			4 + rates_len + /* (extended) rates */
 651			4 + /* power capability */
 652			2 + 2 * sband->n_channels + /* supported channels */
 653			2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 654			2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 655			assoc_data->ie_len + /* extra IEs */
 656			(assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
 657			9, /* WMM */
 658			GFP_KERNEL);
 659	if (!skb)
 660		return;
 661
 662	skb_reserve(skb, local->hw.extra_tx_headroom);
 663
 664	capab = WLAN_CAPABILITY_ESS;
 665
 666	if (sband->band == NL80211_BAND_2GHZ) {
 667		capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 668		capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 669	}
 670
 671	if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 672		capab |= WLAN_CAPABILITY_PRIVACY;
 673
 674	if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 675	    ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 676		capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 677
 678	if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 679		capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 680
 681	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 682	memset(mgmt, 0, 24);
 683	memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 684	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 685	memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 686
 687	if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 688		skb_put(skb, 10);
 689		mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 690						  IEEE80211_STYPE_REASSOC_REQ);
 691		mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 692		mgmt->u.reassoc_req.listen_interval =
 693				cpu_to_le16(local->hw.conf.listen_interval);
 694		memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 695		       ETH_ALEN);
 696	} else {
 697		skb_put(skb, 4);
 698		mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 699						  IEEE80211_STYPE_ASSOC_REQ);
 700		mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 701		mgmt->u.assoc_req.listen_interval =
 702				cpu_to_le16(local->hw.conf.listen_interval);
 703	}
 704
 705	/* SSID */
 706	pos = skb_put(skb, 2 + assoc_data->ssid_len);
 707	*pos++ = WLAN_EID_SSID;
 708	*pos++ = assoc_data->ssid_len;
 709	memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 710
 711	/* add all rates which were marked to be used above */
 712	supp_rates_len = rates_len;
 713	if (supp_rates_len > 8)
 714		supp_rates_len = 8;
 715
 716	pos = skb_put(skb, supp_rates_len + 2);
 717	*pos++ = WLAN_EID_SUPP_RATES;
 718	*pos++ = supp_rates_len;
 719
 720	count = 0;
 721	for (i = 0; i < sband->n_bitrates; i++) {
 722		if (BIT(i) & rates) {
 723			int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 724						5 * (1 << shift));
 725			*pos++ = (u8) rate;
 726			if (++count == 8)
 727				break;
 728		}
 729	}
 730
 731	if (rates_len > count) {
 732		pos = skb_put(skb, rates_len - count + 2);
 733		*pos++ = WLAN_EID_EXT_SUPP_RATES;
 734		*pos++ = rates_len - count;
 735
 736		for (i++; i < sband->n_bitrates; i++) {
 737			if (BIT(i) & rates) {
 738				int rate;
 739				rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 740						    5 * (1 << shift));
 741				*pos++ = (u8) rate;
 742			}
 743		}
 744	}
 745
 746	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 747	    capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 748		pos = skb_put(skb, 4);
 749		*pos++ = WLAN_EID_PWR_CAPABILITY;
 750		*pos++ = 2;
 751		*pos++ = 0; /* min tx power */
 752		 /* max tx power */
 753		*pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 754	}
 755
 756	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 757		/* TODO: get this in reg domain format */
 758		pos = skb_put(skb, 2 * sband->n_channels + 2);
 759		*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 760		*pos++ = 2 * sband->n_channels;
 761		for (i = 0; i < sband->n_channels; i++) {
 762			*pos++ = ieee80211_frequency_to_channel(
 763					sband->channels[i].center_freq);
 764			*pos++ = 1; /* one channel in the subband*/
 765		}
 766	}
 767
 768	/* if present, add any custom IEs that go before HT */
 769	if (assoc_data->ie_len) {
 770		static const u8 before_ht[] = {
 771			WLAN_EID_SSID,
 772			WLAN_EID_SUPP_RATES,
 773			WLAN_EID_EXT_SUPP_RATES,
 774			WLAN_EID_PWR_CAPABILITY,
 775			WLAN_EID_SUPPORTED_CHANNELS,
 776			WLAN_EID_RSN,
 777			WLAN_EID_QOS_CAPA,
 778			WLAN_EID_RRM_ENABLED_CAPABILITIES,
 779			WLAN_EID_MOBILITY_DOMAIN,
 780			WLAN_EID_FAST_BSS_TRANSITION,	/* reassoc only */
 781			WLAN_EID_RIC_DATA,		/* reassoc only */
 782			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 783		};
 784		static const u8 after_ric[] = {
 785			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 786			WLAN_EID_HT_CAPABILITY,
 787			WLAN_EID_BSS_COEX_2040,
 
 788			WLAN_EID_EXT_CAPABILITY,
 789			WLAN_EID_QOS_TRAFFIC_CAPA,
 790			WLAN_EID_TIM_BCAST_REQ,
 791			WLAN_EID_INTERWORKING,
 792			/* 60GHz doesn't happen right now */
 793			WLAN_EID_VHT_CAPABILITY,
 794			WLAN_EID_OPMODE_NOTIF,
 795		};
 796
 797		noffset = ieee80211_ie_split_ric(assoc_data->ie,
 798						 assoc_data->ie_len,
 799						 before_ht,
 800						 ARRAY_SIZE(before_ht),
 801						 after_ric,
 802						 ARRAY_SIZE(after_ric),
 803						 offset);
 804		pos = skb_put(skb, noffset - offset);
 805		memcpy(pos, assoc_data->ie + offset, noffset - offset);
 806		offset = noffset;
 807	}
 808
 809	if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 810			 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 811		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 812
 813	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 814		ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 815				    sband, chan, sdata->smps_mode);
 816
 817	/* if present, add any custom IEs that go before VHT */
 818	if (assoc_data->ie_len) {
 819		static const u8 before_vht[] = {
 820			WLAN_EID_SSID,
 821			WLAN_EID_SUPP_RATES,
 822			WLAN_EID_EXT_SUPP_RATES,
 823			WLAN_EID_PWR_CAPABILITY,
 824			WLAN_EID_SUPPORTED_CHANNELS,
 825			WLAN_EID_RSN,
 826			WLAN_EID_QOS_CAPA,
 827			WLAN_EID_RRM_ENABLED_CAPABILITIES,
 828			WLAN_EID_MOBILITY_DOMAIN,
 829			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 830			WLAN_EID_HT_CAPABILITY,
 831			WLAN_EID_BSS_COEX_2040,
 832			WLAN_EID_EXT_CAPABILITY,
 833			WLAN_EID_QOS_TRAFFIC_CAPA,
 834			WLAN_EID_TIM_BCAST_REQ,
 835			WLAN_EID_INTERWORKING,
 
 836		};
 837
 838		/* RIC already taken above, so no need to handle here anymore */
 839		noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 840					     before_vht, ARRAY_SIZE(before_vht),
 841					     offset);
 842		pos = skb_put(skb, noffset - offset);
 843		memcpy(pos, assoc_data->ie + offset, noffset - offset);
 844		offset = noffset;
 845	}
 846
 847	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 848		ieee80211_add_vht_ie(sdata, skb, sband,
 849				     &assoc_data->ap_vht_cap);
 850
 851	/* if present, add any custom non-vendor IEs that go after HT */
 852	if (assoc_data->ie_len) {
 853		noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 854						    assoc_data->ie_len,
 855						    offset);
 856		pos = skb_put(skb, noffset - offset);
 857		memcpy(pos, assoc_data->ie + offset, noffset - offset);
 858		offset = noffset;
 859	}
 860
 861	if (assoc_data->wmm) {
 862		if (assoc_data->uapsd) {
 863			qos_info = ifmgd->uapsd_queues;
 864			qos_info |= (ifmgd->uapsd_max_sp_len <<
 865				     IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 866		} else {
 867			qos_info = 0;
 868		}
 869
 870		pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 871	}
 872
 873	/* add any remaining custom (i.e. vendor specific here) IEs */
 874	if (assoc_data->ie_len) {
 875		noffset = assoc_data->ie_len;
 876		pos = skb_put(skb, noffset - offset);
 877		memcpy(pos, assoc_data->ie + offset, noffset - offset);
 878	}
 879
 880	if (assoc_data->fils_kek_len &&
 881	    fils_encrypt_assoc_req(skb, assoc_data) < 0) {
 882		dev_kfree_skb(skb);
 883		return;
 884	}
 885
 886	drv_mgd_prepare_tx(local, sdata);
 887
 888	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 889	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 890		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 891						IEEE80211_TX_INTFL_MLME_CONN_TX;
 892	ieee80211_tx_skb(sdata, skb);
 893}
 894
 895void ieee80211_send_pspoll(struct ieee80211_local *local,
 896			   struct ieee80211_sub_if_data *sdata)
 897{
 898	struct ieee80211_pspoll *pspoll;
 899	struct sk_buff *skb;
 900
 901	skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 902	if (!skb)
 903		return;
 904
 905	pspoll = (struct ieee80211_pspoll *) skb->data;
 906	pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 907
 908	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 909	ieee80211_tx_skb(sdata, skb);
 910}
 911
 912void ieee80211_send_nullfunc(struct ieee80211_local *local,
 913			     struct ieee80211_sub_if_data *sdata,
 914			     bool powersave)
 915{
 916	struct sk_buff *skb;
 917	struct ieee80211_hdr_3addr *nullfunc;
 918	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 919
 920	skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 
 921	if (!skb)
 922		return;
 923
 924	nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 925	if (powersave)
 926		nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 927
 928	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 929					IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 930
 931	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 932		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 933
 934	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 935		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 936
 937	ieee80211_tx_skb(sdata, skb);
 938}
 939
 940static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 941					  struct ieee80211_sub_if_data *sdata)
 942{
 943	struct sk_buff *skb;
 944	struct ieee80211_hdr *nullfunc;
 945	__le16 fc;
 946
 947	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 948		return;
 949
 950	skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 951	if (!skb)
 952		return;
 953
 954	skb_reserve(skb, local->hw.extra_tx_headroom);
 955
 956	nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 957	memset(nullfunc, 0, 30);
 958	fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 959			 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 960	nullfunc->frame_control = fc;
 961	memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 962	memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 963	memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 964	memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 965
 966	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 967	ieee80211_tx_skb(sdata, skb);
 968}
 969
 970/* spectrum management related things */
 971static void ieee80211_chswitch_work(struct work_struct *work)
 972{
 973	struct ieee80211_sub_if_data *sdata =
 974		container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 975	struct ieee80211_local *local = sdata->local;
 976	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 977	int ret;
 978
 979	if (!ieee80211_sdata_running(sdata))
 980		return;
 981
 982	sdata_lock(sdata);
 983	mutex_lock(&local->mtx);
 984	mutex_lock(&local->chanctx_mtx);
 985
 986	if (!ifmgd->associated)
 987		goto out;
 988
 989	if (!sdata->vif.csa_active)
 990		goto out;
 991
 992	/*
 993	 * using reservation isn't immediate as it may be deferred until later
 994	 * with multi-vif. once reservation is complete it will re-schedule the
 995	 * work with no reserved_chanctx so verify chandef to check if it
 996	 * completed successfully
 997	 */
 998
 999	if (sdata->reserved_chanctx) {
1000		/*
1001		 * with multi-vif csa driver may call ieee80211_csa_finish()
1002		 * many times while waiting for other interfaces to use their
1003		 * reservations
1004		 */
1005		if (sdata->reserved_ready)
1006			goto out;
1007
1008		ret = ieee80211_vif_use_reserved_context(sdata);
1009		if (ret) {
1010			sdata_info(sdata,
1011				   "failed to use reserved channel context, disconnecting (err=%d)\n",
1012				   ret);
1013			ieee80211_queue_work(&sdata->local->hw,
1014					     &ifmgd->csa_connection_drop_work);
1015			goto out;
1016		}
1017
1018		goto out;
1019	}
1020
1021	if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1022					&sdata->csa_chandef)) {
1023		sdata_info(sdata,
1024			   "failed to finalize channel switch, disconnecting\n");
1025		ieee80211_queue_work(&sdata->local->hw,
1026				     &ifmgd->csa_connection_drop_work);
1027		goto out;
1028	}
1029
1030	/* XXX: shouldn't really modify cfg80211-owned data! */
1031	ifmgd->associated->channel = sdata->csa_chandef.chan;
1032
1033	ifmgd->csa_waiting_bcn = true;
1034
1035	ieee80211_sta_reset_beacon_monitor(sdata);
1036	ieee80211_sta_reset_conn_monitor(sdata);
1037
1038out:
1039	mutex_unlock(&local->chanctx_mtx);
1040	mutex_unlock(&local->mtx);
1041	sdata_unlock(sdata);
1042}
1043
1044static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1045{
1046	struct ieee80211_local *local = sdata->local;
1047	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1048	int ret;
1049
1050	sdata_assert_lock(sdata);
1051
1052	WARN_ON(!sdata->vif.csa_active);
1053
1054	if (sdata->csa_block_tx) {
1055		ieee80211_wake_vif_queues(local, sdata,
1056					  IEEE80211_QUEUE_STOP_REASON_CSA);
1057		sdata->csa_block_tx = false;
1058	}
1059
1060	sdata->vif.csa_active = false;
1061	ifmgd->csa_waiting_bcn = false;
1062
1063	ret = drv_post_channel_switch(sdata);
1064	if (ret) {
1065		sdata_info(sdata,
1066			   "driver post channel switch failed, disconnecting\n");
1067		ieee80211_queue_work(&local->hw,
1068				     &ifmgd->csa_connection_drop_work);
1069		return;
1070	}
1071
1072	cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1073}
1074
1075void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1076{
1077	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1078	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1079
1080	trace_api_chswitch_done(sdata, success);
1081	if (!success) {
1082		sdata_info(sdata,
1083			   "driver channel switch failed, disconnecting\n");
1084		ieee80211_queue_work(&sdata->local->hw,
1085				     &ifmgd->csa_connection_drop_work);
1086	} else {
1087		ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1088	}
1089}
1090EXPORT_SYMBOL(ieee80211_chswitch_done);
1091
1092static void ieee80211_chswitch_timer(unsigned long data)
1093{
1094	struct ieee80211_sub_if_data *sdata =
1095		(struct ieee80211_sub_if_data *) data;
1096
1097	ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1098}
1099
1100static void
1101ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1102				 u64 timestamp, u32 device_timestamp,
1103				 struct ieee802_11_elems *elems,
1104				 bool beacon)
1105{
1106	struct ieee80211_local *local = sdata->local;
1107	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1108	struct cfg80211_bss *cbss = ifmgd->associated;
1109	struct ieee80211_chanctx_conf *conf;
1110	struct ieee80211_chanctx *chanctx;
1111	enum nl80211_band current_band;
1112	struct ieee80211_csa_ie csa_ie;
1113	struct ieee80211_channel_switch ch_switch;
1114	int res;
1115
1116	sdata_assert_lock(sdata);
1117
1118	if (!cbss)
1119		return;
1120
1121	if (local->scanning)
1122		return;
1123
1124	/* disregard subsequent announcements if we are already processing */
1125	if (sdata->vif.csa_active)
1126		return;
1127
1128	current_band = cbss->channel->band;
1129	memset(&csa_ie, 0, sizeof(csa_ie));
1130	res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1131					   ifmgd->flags,
1132					   ifmgd->associated->bssid, &csa_ie);
1133	if (res	< 0)
1134		ieee80211_queue_work(&local->hw,
1135				     &ifmgd->csa_connection_drop_work);
1136	if (res)
1137		return;
1138
1139	if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1140				     IEEE80211_CHAN_DISABLED)) {
1141		sdata_info(sdata,
1142			   "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1143			   ifmgd->associated->bssid,
1144			   csa_ie.chandef.chan->center_freq,
1145			   csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1146			   csa_ie.chandef.center_freq2);
1147		ieee80211_queue_work(&local->hw,
1148				     &ifmgd->csa_connection_drop_work);
1149		return;
1150	}
1151
1152	if (cfg80211_chandef_identical(&csa_ie.chandef,
1153				       &sdata->vif.bss_conf.chandef)) {
1154		if (ifmgd->csa_ignored_same_chan)
1155			return;
1156		sdata_info(sdata,
1157			   "AP %pM tries to chanswitch to same channel, ignore\n",
1158			   ifmgd->associated->bssid);
1159		ifmgd->csa_ignored_same_chan = true;
1160		return;
1161	}
1162
1163	/*
1164	 * Drop all TDLS peers - either we disconnect or move to a different
1165	 * channel from this point on. There's no telling what our peer will do.
1166	 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1167	 * have an incompatible wider chandef.
1168	 */
1169	ieee80211_teardown_tdls_peers(sdata);
1170
1171	mutex_lock(&local->mtx);
1172	mutex_lock(&local->chanctx_mtx);
1173	conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1174					 lockdep_is_held(&local->chanctx_mtx));
1175	if (!conf) {
1176		sdata_info(sdata,
1177			   "no channel context assigned to vif?, disconnecting\n");
1178		goto drop_connection;
1179	}
1180
1181	chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1182
1183	if (local->use_chanctx &&
1184	    !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1185		sdata_info(sdata,
1186			   "driver doesn't support chan-switch with channel contexts\n");
1187		goto drop_connection;
1188	}
1189
1190	ch_switch.timestamp = timestamp;
1191	ch_switch.device_timestamp = device_timestamp;
1192	ch_switch.block_tx = csa_ie.mode;
1193	ch_switch.chandef = csa_ie.chandef;
1194	ch_switch.count = csa_ie.count;
1195
1196	if (drv_pre_channel_switch(sdata, &ch_switch)) {
1197		sdata_info(sdata,
1198			   "preparing for channel switch failed, disconnecting\n");
1199		goto drop_connection;
1200	}
1201
1202	res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1203					    chanctx->mode, false);
1204	if (res) {
1205		sdata_info(sdata,
1206			   "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1207			   res);
1208		goto drop_connection;
1209	}
1210	mutex_unlock(&local->chanctx_mtx);
1211
1212	sdata->vif.csa_active = true;
1213	sdata->csa_chandef = csa_ie.chandef;
1214	sdata->csa_block_tx = csa_ie.mode;
1215	ifmgd->csa_ignored_same_chan = false;
1216
1217	if (sdata->csa_block_tx)
1218		ieee80211_stop_vif_queues(local, sdata,
1219					  IEEE80211_QUEUE_STOP_REASON_CSA);
1220	mutex_unlock(&local->mtx);
1221
1222	cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1223					  csa_ie.count);
1224
1225	if (local->ops->channel_switch) {
1226		/* use driver's channel switch callback */
1227		drv_channel_switch(local, sdata, &ch_switch);
1228		return;
1229	}
1230
1231	/* channel switch handled in software */
1232	if (csa_ie.count <= 1)
1233		ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1234	else
1235		mod_timer(&ifmgd->chswitch_timer,
1236			  TU_TO_EXP_TIME((csa_ie.count - 1) *
1237					 cbss->beacon_interval));
1238	return;
1239 drop_connection:
1240	ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1241	mutex_unlock(&local->chanctx_mtx);
1242	mutex_unlock(&local->mtx);
1243}
1244
1245static bool
1246ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1247				 struct ieee80211_channel *channel,
1248				 const u8 *country_ie, u8 country_ie_len,
1249				 const u8 *pwr_constr_elem,
1250				 int *chan_pwr, int *pwr_reduction)
1251{
1252	struct ieee80211_country_ie_triplet *triplet;
1253	int chan = ieee80211_frequency_to_channel(channel->center_freq);
1254	int i, chan_increment;
1255	bool have_chan_pwr = false;
1256
1257	/* Invalid IE */
1258	if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1259		return false;
1260
1261	triplet = (void *)(country_ie + 3);
1262	country_ie_len -= 3;
1263
1264	switch (channel->band) {
1265	default:
1266		WARN_ON_ONCE(1);
1267		/* fall through */
1268	case NL80211_BAND_2GHZ:
1269	case NL80211_BAND_60GHZ:
1270		chan_increment = 1;
1271		break;
1272	case NL80211_BAND_5GHZ:
1273		chan_increment = 4;
1274		break;
1275	}
1276
1277	/* find channel */
1278	while (country_ie_len >= 3) {
1279		u8 first_channel = triplet->chans.first_channel;
1280
1281		if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1282			goto next;
1283
1284		for (i = 0; i < triplet->chans.num_channels; i++) {
1285			if (first_channel + i * chan_increment == chan) {
1286				have_chan_pwr = true;
1287				*chan_pwr = triplet->chans.max_power;
1288				break;
1289			}
1290		}
1291		if (have_chan_pwr)
1292			break;
1293
1294 next:
1295		triplet++;
1296		country_ie_len -= 3;
1297	}
1298
1299	if (have_chan_pwr && pwr_constr_elem)
1300		*pwr_reduction = *pwr_constr_elem;
1301	else
1302		*pwr_reduction = 0;
1303
1304	return have_chan_pwr;
1305}
1306
1307static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1308				      struct ieee80211_channel *channel,
1309				      const u8 *cisco_dtpc_ie,
1310				      int *pwr_level)
1311{
1312	/* From practical testing, the first data byte of the DTPC element
1313	 * seems to contain the requested dBm level, and the CLI on Cisco
1314	 * APs clearly state the range is -127 to 127 dBm, which indicates
1315	 * a signed byte, although it seemingly never actually goes negative.
1316	 * The other byte seems to always be zero.
1317	 */
1318	*pwr_level = (__s8)cisco_dtpc_ie[4];
1319}
1320
1321static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1322				       struct ieee80211_channel *channel,
1323				       struct ieee80211_mgmt *mgmt,
1324				       const u8 *country_ie, u8 country_ie_len,
1325				       const u8 *pwr_constr_ie,
1326				       const u8 *cisco_dtpc_ie)
1327{
1328	bool has_80211h_pwr = false, has_cisco_pwr = false;
1329	int chan_pwr = 0, pwr_reduction_80211h = 0;
1330	int pwr_level_cisco, pwr_level_80211h;
1331	int new_ap_level;
1332	__le16 capab = mgmt->u.probe_resp.capab_info;
1333
1334	if (country_ie &&
1335	    (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1336	     capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1337		has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1338			sdata, channel, country_ie, country_ie_len,
1339			pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1340		pwr_level_80211h =
1341			max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1342	}
1343
1344	if (cisco_dtpc_ie) {
1345		ieee80211_find_cisco_dtpc(
1346			sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1347		has_cisco_pwr = true;
1348	}
1349
1350	if (!has_80211h_pwr && !has_cisco_pwr)
1351		return 0;
1352
1353	/* If we have both 802.11h and Cisco DTPC, apply both limits
1354	 * by picking the smallest of the two power levels advertised.
1355	 */
1356	if (has_80211h_pwr &&
1357	    (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1358		new_ap_level = pwr_level_80211h;
1359
1360		if (sdata->ap_power_level == new_ap_level)
1361			return 0;
1362
1363		sdata_dbg(sdata,
1364			  "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1365			  pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1366			  sdata->u.mgd.bssid);
1367	} else {  /* has_cisco_pwr is always true here. */
1368		new_ap_level = pwr_level_cisco;
1369
1370		if (sdata->ap_power_level == new_ap_level)
1371			return 0;
1372
1373		sdata_dbg(sdata,
1374			  "Limiting TX power to %d dBm as advertised by %pM\n",
1375			  pwr_level_cisco, sdata->u.mgd.bssid);
1376	}
1377
1378	sdata->ap_power_level = new_ap_level;
1379	if (__ieee80211_recalc_txpower(sdata))
1380		return BSS_CHANGED_TXPOWER;
1381	return 0;
1382}
1383
1384/* powersave */
1385static void ieee80211_enable_ps(struct ieee80211_local *local,
1386				struct ieee80211_sub_if_data *sdata)
1387{
1388	struct ieee80211_conf *conf = &local->hw.conf;
1389
1390	/*
1391	 * If we are scanning right now then the parameters will
1392	 * take effect when scan finishes.
1393	 */
1394	if (local->scanning)
1395		return;
1396
1397	if (conf->dynamic_ps_timeout > 0 &&
1398	    !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1399		mod_timer(&local->dynamic_ps_timer, jiffies +
1400			  msecs_to_jiffies(conf->dynamic_ps_timeout));
1401	} else {
1402		if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1403			ieee80211_send_nullfunc(local, sdata, true);
1404
1405		if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1406		    ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1407			return;
1408
1409		conf->flags |= IEEE80211_CONF_PS;
1410		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1411	}
1412}
1413
1414static void ieee80211_change_ps(struct ieee80211_local *local)
1415{
1416	struct ieee80211_conf *conf = &local->hw.conf;
1417
1418	if (local->ps_sdata) {
1419		ieee80211_enable_ps(local, local->ps_sdata);
1420	} else if (conf->flags & IEEE80211_CONF_PS) {
1421		conf->flags &= ~IEEE80211_CONF_PS;
1422		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1423		del_timer_sync(&local->dynamic_ps_timer);
1424		cancel_work_sync(&local->dynamic_ps_enable_work);
1425	}
1426}
1427
1428static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1429{
1430	struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1431	struct sta_info *sta = NULL;
1432	bool authorized = false;
1433
1434	if (!mgd->powersave)
1435		return false;
1436
1437	if (mgd->broken_ap)
1438		return false;
1439
1440	if (!mgd->associated)
1441		return false;
1442
1443	if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1444		return false;
1445
1446	if (!mgd->have_beacon)
1447		return false;
1448
1449	rcu_read_lock();
1450	sta = sta_info_get(sdata, mgd->bssid);
1451	if (sta)
1452		authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1453	rcu_read_unlock();
1454
1455	return authorized;
1456}
1457
1458/* need to hold RTNL or interface lock */
1459void ieee80211_recalc_ps(struct ieee80211_local *local)
1460{
1461	struct ieee80211_sub_if_data *sdata, *found = NULL;
1462	int count = 0;
1463	int timeout;
1464
1465	if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1466		local->ps_sdata = NULL;
1467		return;
1468	}
1469
1470	list_for_each_entry(sdata, &local->interfaces, list) {
1471		if (!ieee80211_sdata_running(sdata))
1472			continue;
1473		if (sdata->vif.type == NL80211_IFTYPE_AP) {
1474			/* If an AP vif is found, then disable PS
1475			 * by setting the count to zero thereby setting
1476			 * ps_sdata to NULL.
1477			 */
1478			count = 0;
1479			break;
1480		}
1481		if (sdata->vif.type != NL80211_IFTYPE_STATION)
1482			continue;
1483		found = sdata;
1484		count++;
1485	}
1486
1487	if (count == 1 && ieee80211_powersave_allowed(found)) {
1488		u8 dtimper = found->u.mgd.dtim_period;
1489		s32 beaconint_us;
1490
1491		beaconint_us = ieee80211_tu_to_usec(
1492					found->vif.bss_conf.beacon_int);
1493
1494		timeout = local->dynamic_ps_forced_timeout;
1495		if (timeout < 0)
1496			timeout = 100;
1497		local->hw.conf.dynamic_ps_timeout = timeout;
1498
1499		/* If the TIM IE is invalid, pretend the value is 1 */
1500		if (!dtimper)
1501			dtimper = 1;
1502
1503		local->hw.conf.ps_dtim_period = dtimper;
1504		local->ps_sdata = found;
1505	} else {
1506		local->ps_sdata = NULL;
1507	}
1508
1509	ieee80211_change_ps(local);
1510}
1511
1512void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1513{
1514	bool ps_allowed = ieee80211_powersave_allowed(sdata);
1515
1516	if (sdata->vif.bss_conf.ps != ps_allowed) {
1517		sdata->vif.bss_conf.ps = ps_allowed;
1518		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1519	}
1520}
1521
1522void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1523{
1524	struct ieee80211_local *local =
1525		container_of(work, struct ieee80211_local,
1526			     dynamic_ps_disable_work);
1527
1528	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1529		local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1530		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1531	}
1532
1533	ieee80211_wake_queues_by_reason(&local->hw,
1534					IEEE80211_MAX_QUEUE_MAP,
1535					IEEE80211_QUEUE_STOP_REASON_PS,
1536					false);
1537}
1538
1539void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1540{
1541	struct ieee80211_local *local =
1542		container_of(work, struct ieee80211_local,
1543			     dynamic_ps_enable_work);
1544	struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1545	struct ieee80211_if_managed *ifmgd;
1546	unsigned long flags;
1547	int q;
1548
1549	/* can only happen when PS was just disabled anyway */
1550	if (!sdata)
1551		return;
1552
1553	ifmgd = &sdata->u.mgd;
1554
1555	if (local->hw.conf.flags & IEEE80211_CONF_PS)
1556		return;
1557
1558	if (local->hw.conf.dynamic_ps_timeout > 0) {
1559		/* don't enter PS if TX frames are pending */
1560		if (drv_tx_frames_pending(local)) {
1561			mod_timer(&local->dynamic_ps_timer, jiffies +
1562				  msecs_to_jiffies(
1563				  local->hw.conf.dynamic_ps_timeout));
1564			return;
1565		}
1566
1567		/*
1568		 * transmission can be stopped by others which leads to
1569		 * dynamic_ps_timer expiry. Postpone the ps timer if it
1570		 * is not the actual idle state.
1571		 */
1572		spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1573		for (q = 0; q < local->hw.queues; q++) {
1574			if (local->queue_stop_reasons[q]) {
1575				spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1576						       flags);
1577				mod_timer(&local->dynamic_ps_timer, jiffies +
1578					  msecs_to_jiffies(
1579					  local->hw.conf.dynamic_ps_timeout));
1580				return;
1581			}
1582		}
1583		spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1584	}
1585
1586	if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1587	    !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1588		if (drv_tx_frames_pending(local)) {
1589			mod_timer(&local->dynamic_ps_timer, jiffies +
1590				  msecs_to_jiffies(
1591				  local->hw.conf.dynamic_ps_timeout));
1592		} else {
1593			ieee80211_send_nullfunc(local, sdata, true);
1594			/* Flush to get the tx status of nullfunc frame */
1595			ieee80211_flush_queues(local, sdata, false);
1596		}
1597	}
1598
1599	if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1600	      ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1601	    (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1602		ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1603		local->hw.conf.flags |= IEEE80211_CONF_PS;
1604		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1605	}
1606}
1607
1608void ieee80211_dynamic_ps_timer(unsigned long data)
1609{
1610	struct ieee80211_local *local = (void *) data;
1611
1612	ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1613}
1614
1615void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1616{
1617	struct delayed_work *delayed_work = to_delayed_work(work);
1618	struct ieee80211_sub_if_data *sdata =
1619		container_of(delayed_work, struct ieee80211_sub_if_data,
1620			     dfs_cac_timer_work);
1621	struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1622
1623	mutex_lock(&sdata->local->mtx);
1624	if (sdata->wdev.cac_started) {
1625		ieee80211_vif_release_channel(sdata);
1626		cfg80211_cac_event(sdata->dev, &chandef,
1627				   NL80211_RADAR_CAC_FINISHED,
1628				   GFP_KERNEL);
1629	}
1630	mutex_unlock(&sdata->local->mtx);
1631}
1632
1633static bool
1634__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1635{
1636	struct ieee80211_local *local = sdata->local;
1637	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1638	bool ret = false;
1639	int ac;
1640
1641	if (local->hw.queues < IEEE80211_NUM_ACS)
1642		return false;
1643
1644	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1645		struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1646		int non_acm_ac;
1647		unsigned long now = jiffies;
1648
1649		if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1650		    tx_tspec->admitted_time &&
1651		    time_after(now, tx_tspec->time_slice_start + HZ)) {
1652			tx_tspec->consumed_tx_time = 0;
1653			tx_tspec->time_slice_start = now;
1654
1655			if (tx_tspec->downgraded)
1656				tx_tspec->action =
1657					TX_TSPEC_ACTION_STOP_DOWNGRADE;
1658		}
1659
1660		switch (tx_tspec->action) {
1661		case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1662			/* take the original parameters */
1663			if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1664				sdata_err(sdata,
1665					  "failed to set TX queue parameters for queue %d\n",
1666					  ac);
1667			tx_tspec->action = TX_TSPEC_ACTION_NONE;
1668			tx_tspec->downgraded = false;
1669			ret = true;
1670			break;
1671		case TX_TSPEC_ACTION_DOWNGRADE:
1672			if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1673				tx_tspec->action = TX_TSPEC_ACTION_NONE;
1674				ret = true;
1675				break;
1676			}
1677			/* downgrade next lower non-ACM AC */
1678			for (non_acm_ac = ac + 1;
1679			     non_acm_ac < IEEE80211_NUM_ACS;
1680			     non_acm_ac++)
1681				if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1682					break;
1683			/* Usually the loop will result in using BK even if it
1684			 * requires admission control, but such a configuration
1685			 * makes no sense and we have to transmit somehow - the
1686			 * AC selection does the same thing.
1687			 * If we started out trying to downgrade from BK, then
1688			 * the extra condition here might be needed.
1689			 */
1690			if (non_acm_ac >= IEEE80211_NUM_ACS)
1691				non_acm_ac = IEEE80211_AC_BK;
1692			if (drv_conf_tx(local, sdata, ac,
1693					&sdata->tx_conf[non_acm_ac]))
1694				sdata_err(sdata,
1695					  "failed to set TX queue parameters for queue %d\n",
1696					  ac);
1697			tx_tspec->action = TX_TSPEC_ACTION_NONE;
1698			ret = true;
1699			schedule_delayed_work(&ifmgd->tx_tspec_wk,
1700				tx_tspec->time_slice_start + HZ - now + 1);
1701			break;
1702		case TX_TSPEC_ACTION_NONE:
1703			/* nothing now */
1704			break;
1705		}
1706	}
1707
1708	return ret;
1709}
1710
1711void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1712{
1713	if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1714		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1715}
1716
1717static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1718{
1719	struct ieee80211_sub_if_data *sdata;
1720
1721	sdata = container_of(work, struct ieee80211_sub_if_data,
1722			     u.mgd.tx_tspec_wk.work);
1723	ieee80211_sta_handle_tspec_ac_params(sdata);
1724}
1725
1726/* MLME */
1727static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1728				     struct ieee80211_sub_if_data *sdata,
1729				     const u8 *wmm_param, size_t wmm_param_len)
1730{
1731	struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1732	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1733	size_t left;
1734	int count, ac;
1735	const u8 *pos;
1736	u8 uapsd_queues = 0;
1737
1738	if (!local->ops->conf_tx)
1739		return false;
1740
1741	if (local->hw.queues < IEEE80211_NUM_ACS)
1742		return false;
1743
1744	if (!wmm_param)
1745		return false;
1746
1747	if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1748		return false;
1749
1750	if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1751		uapsd_queues = ifmgd->uapsd_queues;
1752
1753	count = wmm_param[6] & 0x0f;
1754	if (count == ifmgd->wmm_last_param_set)
1755		return false;
1756	ifmgd->wmm_last_param_set = count;
1757
1758	pos = wmm_param + 8;
1759	left = wmm_param_len - 8;
1760
1761	memset(&params, 0, sizeof(params));
1762
1763	sdata->wmm_acm = 0;
1764	for (; left >= 4; left -= 4, pos += 4) {
1765		int aci = (pos[0] >> 5) & 0x03;
1766		int acm = (pos[0] >> 4) & 0x01;
1767		bool uapsd = false;
1768
1769		switch (aci) {
1770		case 1: /* AC_BK */
1771			ac = IEEE80211_AC_BK;
1772			if (acm)
1773				sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1774			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1775				uapsd = true;
1776			break;
1777		case 2: /* AC_VI */
1778			ac = IEEE80211_AC_VI;
1779			if (acm)
1780				sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1781			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1782				uapsd = true;
1783			break;
1784		case 3: /* AC_VO */
1785			ac = IEEE80211_AC_VO;
1786			if (acm)
1787				sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1788			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1789				uapsd = true;
1790			break;
1791		case 0: /* AC_BE */
1792		default:
1793			ac = IEEE80211_AC_BE;
1794			if (acm)
1795				sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1796			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1797				uapsd = true;
1798			break;
1799		}
1800
1801		params[ac].aifs = pos[0] & 0x0f;
1802
1803		if (params[ac].aifs < 2) {
1804			sdata_info(sdata,
1805				   "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1806				   params[ac].aifs, aci);
1807			params[ac].aifs = 2;
1808		}
1809		params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1810		params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1811		params[ac].txop = get_unaligned_le16(pos + 2);
1812		params[ac].acm = acm;
1813		params[ac].uapsd = uapsd;
1814
1815		if (params[ac].cw_min > params[ac].cw_max) {
 
1816			sdata_info(sdata,
1817				   "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1818				   params[ac].cw_min, params[ac].cw_max, aci);
1819			return false;
1820		}
 
1821	}
1822
1823	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1824		mlme_dbg(sdata,
1825			 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1826			 ac, params[ac].acm,
1827			 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1828			 params[ac].txop, params[ac].uapsd,
1829			 ifmgd->tx_tspec[ac].downgraded);
1830		sdata->tx_conf[ac] = params[ac];
1831		if (!ifmgd->tx_tspec[ac].downgraded &&
1832		    drv_conf_tx(local, sdata, ac, &params[ac]))
1833			sdata_err(sdata,
1834				  "failed to set TX queue parameters for AC %d\n",
1835				  ac);
1836	}
1837
1838	/* enable WMM or activate new settings */
1839	sdata->vif.bss_conf.qos = true;
1840	return true;
1841}
1842
1843static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1844{
1845	lockdep_assert_held(&sdata->local->mtx);
1846
1847	sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1848	ieee80211_run_deferred_scan(sdata->local);
1849}
1850
1851static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1852{
1853	mutex_lock(&sdata->local->mtx);
1854	__ieee80211_stop_poll(sdata);
1855	mutex_unlock(&sdata->local->mtx);
1856}
1857
1858static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1859					   u16 capab, bool erp_valid, u8 erp)
1860{
1861	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
 
1862	u32 changed = 0;
1863	bool use_protection;
1864	bool use_short_preamble;
1865	bool use_short_slot;
1866
 
 
 
 
1867	if (erp_valid) {
1868		use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1869		use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1870	} else {
1871		use_protection = false;
1872		use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1873	}
1874
1875	use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1876	if (ieee80211_get_sdata_band(sdata) == NL80211_BAND_5GHZ)
1877		use_short_slot = true;
1878
1879	if (use_protection != bss_conf->use_cts_prot) {
1880		bss_conf->use_cts_prot = use_protection;
1881		changed |= BSS_CHANGED_ERP_CTS_PROT;
1882	}
1883
1884	if (use_short_preamble != bss_conf->use_short_preamble) {
1885		bss_conf->use_short_preamble = use_short_preamble;
1886		changed |= BSS_CHANGED_ERP_PREAMBLE;
1887	}
1888
1889	if (use_short_slot != bss_conf->use_short_slot) {
1890		bss_conf->use_short_slot = use_short_slot;
1891		changed |= BSS_CHANGED_ERP_SLOT;
1892	}
1893
1894	return changed;
1895}
1896
1897static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1898				     struct cfg80211_bss *cbss,
1899				     u32 bss_info_changed)
1900{
1901	struct ieee80211_bss *bss = (void *)cbss->priv;
1902	struct ieee80211_local *local = sdata->local;
1903	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1904
1905	bss_info_changed |= BSS_CHANGED_ASSOC;
1906	bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1907		bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1908
1909	sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1910		beacon_loss_count * bss_conf->beacon_int));
1911
1912	sdata->u.mgd.associated = cbss;
1913	memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1914
 
 
1915	sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1916
1917	if (sdata->vif.p2p ||
1918	    sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1919		const struct cfg80211_bss_ies *ies;
1920
1921		rcu_read_lock();
1922		ies = rcu_dereference(cbss->ies);
1923		if (ies) {
1924			int ret;
1925
1926			ret = cfg80211_get_p2p_attr(
1927					ies->data, ies->len,
1928					IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1929					(u8 *) &bss_conf->p2p_noa_attr,
1930					sizeof(bss_conf->p2p_noa_attr));
1931			if (ret >= 2) {
1932				sdata->u.mgd.p2p_noa_index =
1933					bss_conf->p2p_noa_attr.index;
1934				bss_info_changed |= BSS_CHANGED_P2P_PS;
1935			}
1936		}
1937		rcu_read_unlock();
1938	}
1939
1940	/* just to be sure */
1941	ieee80211_stop_poll(sdata);
1942
1943	ieee80211_led_assoc(local, 1);
1944
1945	if (sdata->u.mgd.have_beacon) {
1946		/*
1947		 * If the AP is buggy we may get here with no DTIM period
1948		 * known, so assume it's 1 which is the only safe assumption
1949		 * in that case, although if the TIM IE is broken powersave
1950		 * probably just won't work at all.
1951		 */
1952		bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1953		bss_conf->beacon_rate = bss->beacon_rate;
1954		bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1955	} else {
1956		bss_conf->beacon_rate = NULL;
1957		bss_conf->dtim_period = 0;
1958	}
1959
1960	bss_conf->assoc = 1;
1961
1962	/* Tell the driver to monitor connection quality (if supported) */
1963	if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1964	    bss_conf->cqm_rssi_thold)
1965		bss_info_changed |= BSS_CHANGED_CQM;
1966
1967	/* Enable ARP filtering */
1968	if (bss_conf->arp_addr_cnt)
1969		bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1970
1971	ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1972
1973	mutex_lock(&local->iflist_mtx);
1974	ieee80211_recalc_ps(local);
1975	mutex_unlock(&local->iflist_mtx);
1976
1977	ieee80211_recalc_smps(sdata);
1978	ieee80211_recalc_ps_vif(sdata);
1979
1980	netif_carrier_on(sdata->dev);
1981}
1982
1983static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1984				   u16 stype, u16 reason, bool tx,
1985				   u8 *frame_buf)
1986{
1987	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1988	struct ieee80211_local *local = sdata->local;
1989	u32 changed = 0;
1990
1991	sdata_assert_lock(sdata);
1992
1993	if (WARN_ON_ONCE(tx && !frame_buf))
1994		return;
1995
1996	if (WARN_ON(!ifmgd->associated))
1997		return;
1998
1999	ieee80211_stop_poll(sdata);
2000
2001	ifmgd->associated = NULL;
2002	netif_carrier_off(sdata->dev);
2003
2004	/*
2005	 * if we want to get out of ps before disassoc (why?) we have
2006	 * to do it before sending disassoc, as otherwise the null-packet
2007	 * won't be valid.
2008	 */
2009	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2010		local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2011		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2012	}
2013	local->ps_sdata = NULL;
2014
2015	/* disable per-vif ps */
2016	ieee80211_recalc_ps_vif(sdata);
2017
2018	/* make sure ongoing transmission finishes */
2019	synchronize_net();
2020
2021	/*
2022	 * drop any frame before deauth/disassoc, this can be data or
2023	 * management frame. Since we are disconnecting, we should not
2024	 * insist sending these frames which can take time and delay
2025	 * the disconnection and possible the roaming.
2026	 */
2027	if (tx)
2028		ieee80211_flush_queues(local, sdata, true);
2029
2030	/* deauthenticate/disassociate now */
2031	if (tx || frame_buf)
 
 
 
 
 
 
 
 
 
 
2032		ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2033					       reason, tx, frame_buf);
 
2034
2035	/* flush out frame - make sure the deauth was actually sent */
2036	if (tx)
2037		ieee80211_flush_queues(local, sdata, false);
2038
2039	/* clear bssid only after building the needed mgmt frames */
2040	eth_zero_addr(ifmgd->bssid);
2041
2042	/* remove AP and TDLS peers */
2043	sta_info_flush(sdata);
2044
2045	/* finally reset all BSS / config parameters */
2046	changed |= ieee80211_reset_erp_info(sdata);
2047
2048	ieee80211_led_assoc(local, 0);
2049	changed |= BSS_CHANGED_ASSOC;
2050	sdata->vif.bss_conf.assoc = false;
2051
2052	ifmgd->p2p_noa_index = -1;
2053	memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2054	       sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2055
2056	/* on the next assoc, re-program HT/VHT parameters */
2057	memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2058	memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2059	memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2060	memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2061
2062	/* reset MU-MIMO ownership and group data */
2063	memset(sdata->vif.bss_conf.mu_group.membership, 0,
2064	       sizeof(sdata->vif.bss_conf.mu_group.membership));
2065	memset(sdata->vif.bss_conf.mu_group.position, 0,
2066	       sizeof(sdata->vif.bss_conf.mu_group.position));
2067	changed |= BSS_CHANGED_MU_GROUPS;
2068	sdata->vif.mu_mimo_owner = false;
2069
2070	sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2071
2072	del_timer_sync(&local->dynamic_ps_timer);
2073	cancel_work_sync(&local->dynamic_ps_enable_work);
2074
2075	/* Disable ARP filtering */
2076	if (sdata->vif.bss_conf.arp_addr_cnt)
2077		changed |= BSS_CHANGED_ARP_FILTER;
2078
2079	sdata->vif.bss_conf.qos = false;
2080	changed |= BSS_CHANGED_QOS;
2081
2082	/* The BSSID (not really interesting) and HT changed */
2083	changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2084	ieee80211_bss_info_change_notify(sdata, changed);
2085
2086	/* disassociated - set to defaults now */
2087	ieee80211_set_wmm_default(sdata, false, false);
2088
2089	del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2090	del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2091	del_timer_sync(&sdata->u.mgd.timer);
2092	del_timer_sync(&sdata->u.mgd.chswitch_timer);
2093
2094	sdata->vif.bss_conf.dtim_period = 0;
2095	sdata->vif.bss_conf.beacon_rate = NULL;
2096
2097	ifmgd->have_beacon = false;
2098
2099	ifmgd->flags = 0;
2100	mutex_lock(&local->mtx);
2101	ieee80211_vif_release_channel(sdata);
2102
2103	sdata->vif.csa_active = false;
2104	ifmgd->csa_waiting_bcn = false;
2105	ifmgd->csa_ignored_same_chan = false;
2106	if (sdata->csa_block_tx) {
2107		ieee80211_wake_vif_queues(local, sdata,
2108					  IEEE80211_QUEUE_STOP_REASON_CSA);
2109		sdata->csa_block_tx = false;
2110	}
2111	mutex_unlock(&local->mtx);
2112
2113	/* existing TX TSPEC sessions no longer exist */
2114	memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2115	cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2116
2117	sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2118}
2119
2120void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2121			     struct ieee80211_hdr *hdr)
2122{
2123	/*
2124	 * We can postpone the mgd.timer whenever receiving unicast frames
2125	 * from AP because we know that the connection is working both ways
2126	 * at that time. But multicast frames (and hence also beacons) must
2127	 * be ignored here, because we need to trigger the timer during
2128	 * data idle periods for sending the periodic probe request to the
2129	 * AP we're connected to.
2130	 */
2131	if (is_multicast_ether_addr(hdr->addr1))
2132		return;
2133
2134	ieee80211_sta_reset_conn_monitor(sdata);
2135}
2136
2137static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2138{
2139	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2140	struct ieee80211_local *local = sdata->local;
2141
2142	mutex_lock(&local->mtx);
2143	if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2144		goto out;
2145
2146	__ieee80211_stop_poll(sdata);
2147
2148	mutex_lock(&local->iflist_mtx);
2149	ieee80211_recalc_ps(local);
2150	mutex_unlock(&local->iflist_mtx);
2151
2152	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2153		goto out;
2154
2155	/*
2156	 * We've received a probe response, but are not sure whether
2157	 * we have or will be receiving any beacons or data, so let's
2158	 * schedule the timers again, just in case.
2159	 */
2160	ieee80211_sta_reset_beacon_monitor(sdata);
2161
2162	mod_timer(&ifmgd->conn_mon_timer,
2163		  round_jiffies_up(jiffies +
2164				   IEEE80211_CONNECTION_IDLE_TIME));
2165out:
2166	mutex_unlock(&local->mtx);
2167}
2168
2169static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2170					   struct ieee80211_hdr *hdr,
2171					   u16 tx_time)
2172{
2173	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2174	u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2175	int ac = ieee80211_ac_from_tid(tid);
2176	struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2177	unsigned long now = jiffies;
2178
2179	if (likely(!tx_tspec->admitted_time))
2180		return;
2181
2182	if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2183		tx_tspec->consumed_tx_time = 0;
2184		tx_tspec->time_slice_start = now;
2185
2186		if (tx_tspec->downgraded) {
2187			tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2188			schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2189		}
2190	}
2191
2192	if (tx_tspec->downgraded)
2193		return;
2194
2195	tx_tspec->consumed_tx_time += tx_time;
2196
2197	if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2198		tx_tspec->downgraded = true;
2199		tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2200		schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2201	}
2202}
2203
2204void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2205			     struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2206{
2207	ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2208
2209	if (!ieee80211_is_data(hdr->frame_control))
2210	    return;
2211
2212	if (ieee80211_is_nullfunc(hdr->frame_control) &&
2213	    sdata->u.mgd.probe_send_count > 0) {
2214		if (ack)
2215			ieee80211_sta_reset_conn_monitor(sdata);
2216		else
2217			sdata->u.mgd.nullfunc_failed = true;
2218		ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2219		return;
2220	}
2221
2222	if (ack)
2223		ieee80211_sta_reset_conn_monitor(sdata);
2224}
2225
2226static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2227{
2228	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2229	const u8 *ssid;
2230	u8 *dst = ifmgd->associated->bssid;
2231	u8 unicast_limit = max(1, max_probe_tries - 3);
2232	struct sta_info *sta;
2233
2234	/*
2235	 * Try sending broadcast probe requests for the last three
2236	 * probe requests after the first ones failed since some
2237	 * buggy APs only support broadcast probe requests.
2238	 */
2239	if (ifmgd->probe_send_count >= unicast_limit)
2240		dst = NULL;
2241
2242	/*
2243	 * When the hardware reports an accurate Tx ACK status, it's
2244	 * better to send a nullfunc frame instead of a probe request,
2245	 * as it will kick us off the AP quickly if we aren't associated
2246	 * anymore. The timeout will be reset if the frame is ACKed by
2247	 * the AP.
2248	 */
2249	ifmgd->probe_send_count++;
2250
2251	if (dst) {
2252		mutex_lock(&sdata->local->sta_mtx);
2253		sta = sta_info_get(sdata, dst);
2254		if (!WARN_ON(!sta))
2255			ieee80211_check_fast_rx(sta);
2256		mutex_unlock(&sdata->local->sta_mtx);
2257	}
2258
2259	if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2260		ifmgd->nullfunc_failed = false;
2261		ieee80211_send_nullfunc(sdata->local, sdata, false);
2262	} else {
2263		int ssid_len;
2264
2265		rcu_read_lock();
2266		ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2267		if (WARN_ON_ONCE(ssid == NULL))
2268			ssid_len = 0;
2269		else
2270			ssid_len = ssid[1];
2271
2272		ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2273					 ssid + 2, ssid_len, NULL,
2274					 0, (u32) -1, true, 0,
2275					 ifmgd->associated->channel, false);
2276		rcu_read_unlock();
2277	}
2278
2279	ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2280	run_again(sdata, ifmgd->probe_timeout);
2281}
2282
2283static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2284				   bool beacon)
2285{
2286	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2287	bool already = false;
2288
2289	if (!ieee80211_sdata_running(sdata))
2290		return;
2291
2292	sdata_lock(sdata);
2293
2294	if (!ifmgd->associated)
2295		goto out;
2296
2297	mutex_lock(&sdata->local->mtx);
2298
2299	if (sdata->local->tmp_channel || sdata->local->scanning) {
2300		mutex_unlock(&sdata->local->mtx);
2301		goto out;
2302	}
2303
2304	if (beacon) {
2305		mlme_dbg_ratelimited(sdata,
2306				     "detected beacon loss from AP (missed %d beacons) - probing\n",
2307				     beacon_loss_count);
2308
2309		ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2310	}
2311
2312	/*
2313	 * The driver/our work has already reported this event or the
2314	 * connection monitoring has kicked in and we have already sent
2315	 * a probe request. Or maybe the AP died and the driver keeps
2316	 * reporting until we disassociate...
2317	 *
2318	 * In either case we have to ignore the current call to this
2319	 * function (except for setting the correct probe reason bit)
2320	 * because otherwise we would reset the timer every time and
2321	 * never check whether we received a probe response!
2322	 */
2323	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2324		already = true;
2325
2326	ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2327
2328	mutex_unlock(&sdata->local->mtx);
2329
2330	if (already)
2331		goto out;
2332
2333	mutex_lock(&sdata->local->iflist_mtx);
2334	ieee80211_recalc_ps(sdata->local);
2335	mutex_unlock(&sdata->local->iflist_mtx);
2336
2337	ifmgd->probe_send_count = 0;
2338	ieee80211_mgd_probe_ap_send(sdata);
2339 out:
2340	sdata_unlock(sdata);
2341}
2342
2343struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2344					  struct ieee80211_vif *vif)
2345{
2346	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2347	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2348	struct cfg80211_bss *cbss;
2349	struct sk_buff *skb;
2350	const u8 *ssid;
2351	int ssid_len;
2352
2353	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2354		return NULL;
2355
2356	sdata_assert_lock(sdata);
2357
2358	if (ifmgd->associated)
2359		cbss = ifmgd->associated;
2360	else if (ifmgd->auth_data)
2361		cbss = ifmgd->auth_data->bss;
2362	else if (ifmgd->assoc_data)
2363		cbss = ifmgd->assoc_data->bss;
2364	else
2365		return NULL;
2366
2367	rcu_read_lock();
2368	ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2369	if (WARN_ON_ONCE(ssid == NULL))
2370		ssid_len = 0;
2371	else
2372		ssid_len = ssid[1];
2373
2374	skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2375					(u32) -1, cbss->channel,
2376					ssid + 2, ssid_len,
2377					NULL, 0, true);
2378	rcu_read_unlock();
2379
2380	return skb;
2381}
2382EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2383
2384static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2385					const u8 *buf, size_t len, bool tx,
2386					u16 reason)
2387{
2388	struct ieee80211_event event = {
2389		.type = MLME_EVENT,
2390		.u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2391		.u.mlme.reason = reason,
2392	};
2393
2394	if (tx)
2395		cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2396	else
2397		cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2398
2399	drv_event_callback(sdata->local, sdata, &event);
2400}
2401
2402static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2403{
2404	struct ieee80211_local *local = sdata->local;
2405	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2406	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2407
2408	sdata_lock(sdata);
2409	if (!ifmgd->associated) {
2410		sdata_unlock(sdata);
2411		return;
2412	}
2413
2414	/* AP is probably out of range (or not reachable for another reason) so
2415	 * remove the bss struct for that AP.
2416	 */
2417	cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2418
2419	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2420			       WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2421			       true, frame_buf);
2422	mutex_lock(&local->mtx);
2423	sdata->vif.csa_active = false;
2424	ifmgd->csa_waiting_bcn = false;
2425	if (sdata->csa_block_tx) {
2426		ieee80211_wake_vif_queues(local, sdata,
2427					  IEEE80211_QUEUE_STOP_REASON_CSA);
2428		sdata->csa_block_tx = false;
2429	}
2430	mutex_unlock(&local->mtx);
2431
2432	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2433				    WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2434
2435	sdata_unlock(sdata);
2436}
2437
2438static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2439{
2440	struct ieee80211_sub_if_data *sdata =
2441		container_of(work, struct ieee80211_sub_if_data,
2442			     u.mgd.beacon_connection_loss_work);
2443	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2444
2445	if (ifmgd->associated)
2446		ifmgd->beacon_loss_count++;
2447
2448	if (ifmgd->connection_loss) {
2449		sdata_info(sdata, "Connection to AP %pM lost\n",
2450			   ifmgd->bssid);
2451		__ieee80211_disconnect(sdata);
2452	} else {
2453		ieee80211_mgd_probe_ap(sdata, true);
2454	}
2455}
2456
2457static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2458{
2459	struct ieee80211_sub_if_data *sdata =
2460		container_of(work, struct ieee80211_sub_if_data,
2461			     u.mgd.csa_connection_drop_work);
2462
2463	__ieee80211_disconnect(sdata);
2464}
2465
2466void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2467{
2468	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2469	struct ieee80211_hw *hw = &sdata->local->hw;
2470
2471	trace_api_beacon_loss(sdata);
2472
2473	sdata->u.mgd.connection_loss = false;
2474	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2475}
2476EXPORT_SYMBOL(ieee80211_beacon_loss);
2477
2478void ieee80211_connection_loss(struct ieee80211_vif *vif)
2479{
2480	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2481	struct ieee80211_hw *hw = &sdata->local->hw;
2482
2483	trace_api_connection_loss(sdata);
2484
2485	sdata->u.mgd.connection_loss = true;
2486	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2487}
2488EXPORT_SYMBOL(ieee80211_connection_loss);
2489
2490
2491static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2492					bool assoc)
2493{
2494	struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2495
2496	sdata_assert_lock(sdata);
2497
2498	if (!assoc) {
2499		/*
2500		 * we are not authenticated yet, the only timer that could be
2501		 * running is the timeout for the authentication response which
2502		 * which is not relevant anymore.
2503		 */
2504		del_timer_sync(&sdata->u.mgd.timer);
2505		sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2506
2507		eth_zero_addr(sdata->u.mgd.bssid);
2508		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2509		sdata->u.mgd.flags = 0;
2510		mutex_lock(&sdata->local->mtx);
2511		ieee80211_vif_release_channel(sdata);
2512		mutex_unlock(&sdata->local->mtx);
2513	}
2514
2515	cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2516	kfree(auth_data);
2517	sdata->u.mgd.auth_data = NULL;
2518}
2519
2520static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2521					 bool assoc, bool abandon)
2522{
2523	struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2524
2525	sdata_assert_lock(sdata);
2526
2527	if (!assoc) {
2528		/*
2529		 * we are not associated yet, the only timer that could be
2530		 * running is the timeout for the association response which
2531		 * which is not relevant anymore.
2532		 */
2533		del_timer_sync(&sdata->u.mgd.timer);
2534		sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2535
2536		eth_zero_addr(sdata->u.mgd.bssid);
2537		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2538		sdata->u.mgd.flags = 0;
2539		sdata->vif.mu_mimo_owner = false;
2540
2541		mutex_lock(&sdata->local->mtx);
2542		ieee80211_vif_release_channel(sdata);
2543		mutex_unlock(&sdata->local->mtx);
2544
2545		if (abandon)
2546			cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2547	}
2548
2549	kfree(assoc_data);
2550	sdata->u.mgd.assoc_data = NULL;
2551}
2552
2553static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2554				     struct ieee80211_mgmt *mgmt, size_t len)
2555{
2556	struct ieee80211_local *local = sdata->local;
2557	struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2558	u8 *pos;
2559	struct ieee802_11_elems elems;
2560	u32 tx_flags = 0;
2561
2562	pos = mgmt->u.auth.variable;
2563	ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2564	if (!elems.challenge)
2565		return;
2566	auth_data->expected_transaction = 4;
2567	drv_mgd_prepare_tx(sdata->local, sdata);
2568	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2569		tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2570			   IEEE80211_TX_INTFL_MLME_CONN_TX;
2571	ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2572			    elems.challenge - 2, elems.challenge_len + 2,
2573			    auth_data->bss->bssid, auth_data->bss->bssid,
2574			    auth_data->key, auth_data->key_len,
2575			    auth_data->key_idx, tx_flags);
2576}
2577
2578static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2579				   struct ieee80211_mgmt *mgmt, size_t len)
2580{
2581	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2582	u8 bssid[ETH_ALEN];
2583	u16 auth_alg, auth_transaction, status_code;
2584	struct sta_info *sta;
2585	struct ieee80211_event event = {
2586		.type = MLME_EVENT,
2587		.u.mlme.data = AUTH_EVENT,
2588	};
2589
2590	sdata_assert_lock(sdata);
2591
2592	if (len < 24 + 6)
2593		return;
2594
2595	if (!ifmgd->auth_data || ifmgd->auth_data->done)
2596		return;
2597
2598	memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2599
2600	if (!ether_addr_equal(bssid, mgmt->bssid))
2601		return;
2602
2603	auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2604	auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2605	status_code = le16_to_cpu(mgmt->u.auth.status_code);
2606
2607	if (auth_alg != ifmgd->auth_data->algorithm ||
2608	    auth_transaction != ifmgd->auth_data->expected_transaction) {
2609		sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2610			   mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2611			   auth_transaction,
2612			   ifmgd->auth_data->expected_transaction);
2613		return;
2614	}
2615
2616	if (status_code != WLAN_STATUS_SUCCESS) {
2617		sdata_info(sdata, "%pM denied authentication (status %d)\n",
2618			   mgmt->sa, status_code);
2619		ieee80211_destroy_auth_data(sdata, false);
2620		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2621		event.u.mlme.status = MLME_DENIED;
2622		event.u.mlme.reason = status_code;
2623		drv_event_callback(sdata->local, sdata, &event);
2624		return;
2625	}
2626
2627	switch (ifmgd->auth_data->algorithm) {
2628	case WLAN_AUTH_OPEN:
2629	case WLAN_AUTH_LEAP:
2630	case WLAN_AUTH_FT:
2631	case WLAN_AUTH_SAE:
2632	case WLAN_AUTH_FILS_SK:
2633	case WLAN_AUTH_FILS_SK_PFS:
2634	case WLAN_AUTH_FILS_PK:
2635		break;
2636	case WLAN_AUTH_SHARED_KEY:
2637		if (ifmgd->auth_data->expected_transaction != 4) {
2638			ieee80211_auth_challenge(sdata, mgmt, len);
2639			/* need another frame */
2640			return;
2641		}
2642		break;
2643	default:
2644		WARN_ONCE(1, "invalid auth alg %d",
2645			  ifmgd->auth_data->algorithm);
2646		return;
2647	}
2648
2649	event.u.mlme.status = MLME_SUCCESS;
2650	drv_event_callback(sdata->local, sdata, &event);
2651	sdata_info(sdata, "authenticated\n");
2652	ifmgd->auth_data->done = true;
2653	ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2654	ifmgd->auth_data->timeout_started = true;
2655	run_again(sdata, ifmgd->auth_data->timeout);
2656
2657	if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2658	    ifmgd->auth_data->expected_transaction != 2) {
2659		/*
2660		 * Report auth frame to user space for processing since another
2661		 * round of Authentication frames is still needed.
2662		 */
2663		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2664		return;
2665	}
2666
2667	/* move station state to auth */
2668	mutex_lock(&sdata->local->sta_mtx);
2669	sta = sta_info_get(sdata, bssid);
2670	if (!sta) {
2671		WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2672		goto out_err;
2673	}
2674	if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2675		sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2676		goto out_err;
2677	}
2678	mutex_unlock(&sdata->local->sta_mtx);
2679
2680	cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2681	return;
2682 out_err:
2683	mutex_unlock(&sdata->local->sta_mtx);
2684	/* ignore frame -- wait for timeout */
2685}
2686
2687#define case_WLAN(type) \
2688	case WLAN_REASON_##type: return #type
2689
2690static const char *ieee80211_get_reason_code_string(u16 reason_code)
2691{
2692	switch (reason_code) {
2693	case_WLAN(UNSPECIFIED);
2694	case_WLAN(PREV_AUTH_NOT_VALID);
2695	case_WLAN(DEAUTH_LEAVING);
2696	case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2697	case_WLAN(DISASSOC_AP_BUSY);
2698	case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2699	case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2700	case_WLAN(DISASSOC_STA_HAS_LEFT);
2701	case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2702	case_WLAN(DISASSOC_BAD_POWER);
2703	case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2704	case_WLAN(INVALID_IE);
2705	case_WLAN(MIC_FAILURE);
2706	case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2707	case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2708	case_WLAN(IE_DIFFERENT);
2709	case_WLAN(INVALID_GROUP_CIPHER);
2710	case_WLAN(INVALID_PAIRWISE_CIPHER);
2711	case_WLAN(INVALID_AKMP);
2712	case_WLAN(UNSUPP_RSN_VERSION);
2713	case_WLAN(INVALID_RSN_IE_CAP);
2714	case_WLAN(IEEE8021X_FAILED);
2715	case_WLAN(CIPHER_SUITE_REJECTED);
2716	case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2717	case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2718	case_WLAN(DISASSOC_LOW_ACK);
2719	case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2720	case_WLAN(QSTA_LEAVE_QBSS);
2721	case_WLAN(QSTA_NOT_USE);
2722	case_WLAN(QSTA_REQUIRE_SETUP);
2723	case_WLAN(QSTA_TIMEOUT);
2724	case_WLAN(QSTA_CIPHER_NOT_SUPP);
2725	case_WLAN(MESH_PEER_CANCELED);
2726	case_WLAN(MESH_MAX_PEERS);
2727	case_WLAN(MESH_CONFIG);
2728	case_WLAN(MESH_CLOSE);
2729	case_WLAN(MESH_MAX_RETRIES);
2730	case_WLAN(MESH_CONFIRM_TIMEOUT);
2731	case_WLAN(MESH_INVALID_GTK);
2732	case_WLAN(MESH_INCONSISTENT_PARAM);
2733	case_WLAN(MESH_INVALID_SECURITY);
2734	case_WLAN(MESH_PATH_ERROR);
2735	case_WLAN(MESH_PATH_NOFORWARD);
2736	case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2737	case_WLAN(MAC_EXISTS_IN_MBSS);
2738	case_WLAN(MESH_CHAN_REGULATORY);
2739	case_WLAN(MESH_CHAN);
2740	default: return "<unknown>";
2741	}
2742}
2743
2744static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2745				     struct ieee80211_mgmt *mgmt, size_t len)
2746{
2747	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2748	u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2749
2750	sdata_assert_lock(sdata);
2751
2752	if (len < 24 + 2)
2753		return;
2754
2755	if (ifmgd->associated &&
2756	    ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2757		const u8 *bssid = ifmgd->associated->bssid;
2758
2759		sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2760			   bssid, reason_code,
2761			   ieee80211_get_reason_code_string(reason_code));
2762
2763		ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2764
2765		ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2766					    reason_code);
2767		return;
2768	}
2769
2770	if (ifmgd->assoc_data &&
2771	    ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2772		const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2773
2774		sdata_info(sdata,
2775			   "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2776			   bssid, reason_code,
2777			   ieee80211_get_reason_code_string(reason_code));
2778
2779		ieee80211_destroy_assoc_data(sdata, false, true);
2780
2781		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2782		return;
2783	}
2784}
2785
2786
2787static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2788				       struct ieee80211_mgmt *mgmt, size_t len)
2789{
2790	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2791	u16 reason_code;
2792
2793	sdata_assert_lock(sdata);
2794
2795	if (len < 24 + 2)
2796		return;
2797
2798	if (!ifmgd->associated ||
2799	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2800		return;
2801
2802	reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2803
2804	sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2805		   mgmt->sa, reason_code);
 
2806
2807	ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2808
2809	ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2810}
2811
2812static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2813				u8 *supp_rates, unsigned int supp_rates_len,
2814				u32 *rates, u32 *basic_rates,
2815				bool *have_higher_than_11mbit,
2816				int *min_rate, int *min_rate_index,
2817				int shift, u32 rate_flags)
2818{
2819	int i, j;
2820
2821	for (i = 0; i < supp_rates_len; i++) {
2822		int rate = supp_rates[i] & 0x7f;
2823		bool is_basic = !!(supp_rates[i] & 0x80);
2824
2825		if ((rate * 5 * (1 << shift)) > 110)
2826			*have_higher_than_11mbit = true;
2827
2828		/*
2829		 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2830		 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2831		 *
2832		 * Note: Even through the membership selector and the basic
2833		 *	 rate flag share the same bit, they are not exactly
2834		 *	 the same.
2835		 */
2836		if (!!(supp_rates[i] & 0x80) &&
2837		    (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2838			continue;
2839
2840		for (j = 0; j < sband->n_bitrates; j++) {
2841			struct ieee80211_rate *br;
2842			int brate;
2843
2844			br = &sband->bitrates[j];
2845			if ((rate_flags & br->flags) != rate_flags)
2846				continue;
2847
2848			brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2849			if (brate == rate) {
2850				*rates |= BIT(j);
2851				if (is_basic)
2852					*basic_rates |= BIT(j);
2853				if ((rate * 5) < *min_rate) {
2854					*min_rate = rate * 5;
2855					*min_rate_index = j;
2856				}
2857				break;
2858			}
2859		}
2860	}
2861}
2862
2863static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2864				    struct cfg80211_bss *cbss,
2865				    struct ieee80211_mgmt *mgmt, size_t len)
2866{
2867	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2868	struct ieee80211_local *local = sdata->local;
2869	struct ieee80211_supported_band *sband;
2870	struct sta_info *sta;
2871	u8 *pos;
2872	u16 capab_info, aid;
2873	struct ieee802_11_elems elems;
2874	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2875	const struct cfg80211_bss_ies *bss_ies = NULL;
2876	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2877	u32 changed = 0;
2878	int err;
2879	bool ret;
2880
2881	/* AssocResp and ReassocResp have identical structure */
2882
2883	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2884	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2885
2886	if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2887		sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2888			   aid);
2889	aid &= ~(BIT(15) | BIT(14));
 
2890
2891	ifmgd->broken_ap = false;
2892
2893	if (aid == 0 || aid > IEEE80211_MAX_AID) {
2894		sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2895			   aid);
2896		aid = 0;
2897		ifmgd->broken_ap = true;
2898	}
2899
2900	pos = mgmt->u.assoc_resp.variable;
2901	ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2902
2903	if (!elems.supp_rates) {
2904		sdata_info(sdata, "no SuppRates element in AssocResp\n");
2905		return false;
2906	}
2907
2908	ifmgd->aid = aid;
2909	ifmgd->tdls_chan_switch_prohibited =
2910		elems.ext_capab && elems.ext_capab_len >= 5 &&
2911		(elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2912
2913	/*
2914	 * Some APs are erroneously not including some information in their
2915	 * (re)association response frames. Try to recover by using the data
2916	 * from the beacon or probe response. This seems to afflict mobile
2917	 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2918	 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2919	 */
2920	if ((assoc_data->wmm && !elems.wmm_param) ||
2921	    (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2922	     (!elems.ht_cap_elem || !elems.ht_operation)) ||
2923	    (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2924	     (!elems.vht_cap_elem || !elems.vht_operation))) {
2925		const struct cfg80211_bss_ies *ies;
2926		struct ieee802_11_elems bss_elems;
2927
2928		rcu_read_lock();
2929		ies = rcu_dereference(cbss->ies);
2930		if (ies)
2931			bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2932					  GFP_ATOMIC);
2933		rcu_read_unlock();
2934		if (!bss_ies)
2935			return false;
2936
2937		ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2938				       false, &bss_elems);
2939		if (assoc_data->wmm &&
2940		    !elems.wmm_param && bss_elems.wmm_param) {
2941			elems.wmm_param = bss_elems.wmm_param;
2942			sdata_info(sdata,
2943				   "AP bug: WMM param missing from AssocResp\n");
2944		}
2945
2946		/*
2947		 * Also check if we requested HT/VHT, otherwise the AP doesn't
2948		 * have to include the IEs in the (re)association response.
2949		 */
2950		if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2951		    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2952			elems.ht_cap_elem = bss_elems.ht_cap_elem;
2953			sdata_info(sdata,
2954				   "AP bug: HT capability missing from AssocResp\n");
2955		}
2956		if (!elems.ht_operation && bss_elems.ht_operation &&
2957		    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2958			elems.ht_operation = bss_elems.ht_operation;
2959			sdata_info(sdata,
2960				   "AP bug: HT operation missing from AssocResp\n");
2961		}
2962		if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2963		    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2964			elems.vht_cap_elem = bss_elems.vht_cap_elem;
2965			sdata_info(sdata,
2966				   "AP bug: VHT capa missing from AssocResp\n");
2967		}
2968		if (!elems.vht_operation && bss_elems.vht_operation &&
2969		    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2970			elems.vht_operation = bss_elems.vht_operation;
2971			sdata_info(sdata,
2972				   "AP bug: VHT operation missing from AssocResp\n");
2973		}
2974	}
2975
2976	/*
2977	 * We previously checked these in the beacon/probe response, so
2978	 * they should be present here. This is just a safety net.
2979	 */
2980	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2981	    (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2982		sdata_info(sdata,
2983			   "HT AP is missing WMM params or HT capability/operation\n");
2984		ret = false;
2985		goto out;
2986	}
2987
2988	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2989	    (!elems.vht_cap_elem || !elems.vht_operation)) {
2990		sdata_info(sdata,
2991			   "VHT AP is missing VHT capability/operation\n");
2992		ret = false;
2993		goto out;
2994	}
2995
2996	mutex_lock(&sdata->local->sta_mtx);
2997	/*
2998	 * station info was already allocated and inserted before
2999	 * the association and should be available to us
3000	 */
3001	sta = sta_info_get(sdata, cbss->bssid);
3002	if (WARN_ON(!sta)) {
3003		mutex_unlock(&sdata->local->sta_mtx);
3004		ret = false;
3005		goto out;
3006	}
3007
3008	sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
 
 
 
 
 
3009
3010	/* Set up internal HT/VHT capabilities */
3011	if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3012		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3013						  elems.ht_cap_elem, sta);
3014
3015	if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3016		ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3017						    elems.vht_cap_elem, sta);
3018
3019	/*
3020	 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3021	 * in their association response, so ignore that data for our own
3022	 * configuration. If it changed since the last beacon, we'll get the
3023	 * next beacon and update then.
3024	 */
3025
3026	/*
3027	 * If an operating mode notification IE is present, override the
3028	 * NSS calculation (that would be done in rate_control_rate_init())
3029	 * and use the # of streams from that element.
3030	 */
3031	if (elems.opmode_notif &&
3032	    !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3033		u8 nss;
3034
3035		nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3036		nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3037		nss += 1;
3038		sta->sta.rx_nss = nss;
3039	}
3040
3041	rate_control_rate_init(sta);
3042
3043	if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3044		set_sta_flag(sta, WLAN_STA_MFP);
3045		sta->sta.mfp = true;
3046	} else {
3047		sta->sta.mfp = false;
3048	}
3049
3050	sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3051
3052	err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3053	if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3054		err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3055	if (err) {
3056		sdata_info(sdata,
3057			   "failed to move station %pM to desired state\n",
3058			   sta->sta.addr);
3059		WARN_ON(__sta_info_destroy(sta));
3060		mutex_unlock(&sdata->local->sta_mtx);
3061		ret = false;
3062		goto out;
3063	}
3064
3065	mutex_unlock(&sdata->local->sta_mtx);
3066
3067	/*
3068	 * Always handle WMM once after association regardless
3069	 * of the first value the AP uses. Setting -1 here has
3070	 * that effect because the AP values is an unsigned
3071	 * 4-bit value.
3072	 */
3073	ifmgd->wmm_last_param_set = -1;
3074
3075	if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3076		ieee80211_set_wmm_default(sdata, false, false);
3077	} else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3078					     elems.wmm_param_len)) {
3079		/* still enable QoS since we might have HT/VHT */
3080		ieee80211_set_wmm_default(sdata, false, true);
3081		/* set the disable-WMM flag in this case to disable
3082		 * tracking WMM parameter changes in the beacon if
3083		 * the parameters weren't actually valid. Doing so
3084		 * avoids changing parameters very strangely when
3085		 * the AP is going back and forth between valid and
3086		 * invalid parameters.
3087		 */
3088		ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3089	}
3090	changed |= BSS_CHANGED_QOS;
3091
 
 
 
 
 
 
 
 
 
 
 
 
3092	/* set AID and assoc capability,
3093	 * ieee80211_set_associated() will tell the driver */
3094	bss_conf->aid = aid;
3095	bss_conf->assoc_capability = capab_info;
3096	ieee80211_set_associated(sdata, cbss, changed);
3097
3098	/*
3099	 * If we're using 4-addr mode, let the AP know that we're
3100	 * doing so, so that it can create the STA VLAN on its side
3101	 */
3102	if (ifmgd->use_4addr)
3103		ieee80211_send_4addr_nullfunc(local, sdata);
3104
3105	/*
3106	 * Start timer to probe the connection to the AP now.
3107	 * Also start the timer that will detect beacon loss.
3108	 */
3109	ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3110	ieee80211_sta_reset_beacon_monitor(sdata);
3111
3112	ret = true;
3113 out:
3114	kfree(bss_ies);
3115	return ret;
3116}
3117
3118static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3119					 struct ieee80211_mgmt *mgmt,
3120					 size_t len)
3121{
3122	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3123	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3124	u16 capab_info, status_code, aid;
3125	struct ieee802_11_elems elems;
3126	int ac, uapsd_queues = -1;
3127	u8 *pos;
3128	bool reassoc;
3129	struct cfg80211_bss *bss;
3130	struct ieee80211_event event = {
3131		.type = MLME_EVENT,
3132		.u.mlme.data = ASSOC_EVENT,
3133	};
3134
3135	sdata_assert_lock(sdata);
3136
3137	if (!assoc_data)
3138		return;
3139	if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3140		return;
3141
3142	/*
3143	 * AssocResp and ReassocResp have identical structure, so process both
3144	 * of them in this function.
3145	 */
3146
3147	if (len < 24 + 6)
3148		return;
3149
3150	reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3151	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3152	status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3153	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3154
3155	sdata_info(sdata,
3156		   "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3157		   reassoc ? "Rea" : "A", mgmt->sa,
3158		   capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3159
3160	if (assoc_data->fils_kek_len &&
3161	    fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3162		return;
3163
3164	pos = mgmt->u.assoc_resp.variable;
3165	ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3166
3167	if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3168	    elems.timeout_int &&
3169	    elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3170		u32 tu, ms;
3171		tu = le32_to_cpu(elems.timeout_int->value);
3172		ms = tu * 1024 / 1000;
3173		sdata_info(sdata,
3174			   "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3175			   mgmt->sa, tu, ms);
3176		assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3177		assoc_data->timeout_started = true;
3178		if (ms > IEEE80211_ASSOC_TIMEOUT)
3179			run_again(sdata, assoc_data->timeout);
3180		return;
3181	}
3182
3183	bss = assoc_data->bss;
3184
3185	if (status_code != WLAN_STATUS_SUCCESS) {
3186		sdata_info(sdata, "%pM denied association (code=%d)\n",
3187			   mgmt->sa, status_code);
3188		ieee80211_destroy_assoc_data(sdata, false, false);
3189		event.u.mlme.status = MLME_DENIED;
3190		event.u.mlme.reason = status_code;
3191		drv_event_callback(sdata->local, sdata, &event);
3192	} else {
3193		if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3194			/* oops -- internal error -- send timeout for now */
3195			ieee80211_destroy_assoc_data(sdata, false, false);
3196			cfg80211_assoc_timeout(sdata->dev, bss);
3197			return;
3198		}
3199		event.u.mlme.status = MLME_SUCCESS;
3200		drv_event_callback(sdata->local, sdata, &event);
3201		sdata_info(sdata, "associated\n");
3202
3203		/*
3204		 * destroy assoc_data afterwards, as otherwise an idle
3205		 * recalc after assoc_data is NULL but before associated
3206		 * is set can cause the interface to go idle
3207		 */
3208		ieee80211_destroy_assoc_data(sdata, true, false);
3209
3210		/* get uapsd queues configuration */
3211		uapsd_queues = 0;
3212		for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3213			if (sdata->tx_conf[ac].uapsd)
3214				uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3215	}
3216
3217	cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3218}
3219
3220static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3221				  struct ieee80211_mgmt *mgmt, size_t len,
3222				  struct ieee80211_rx_status *rx_status,
3223				  struct ieee802_11_elems *elems)
3224{
3225	struct ieee80211_local *local = sdata->local;
3226	struct ieee80211_bss *bss;
3227	struct ieee80211_channel *channel;
3228
3229	sdata_assert_lock(sdata);
3230
3231	channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3232	if (!channel)
3233		return;
3234
3235	bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3236					channel);
3237	if (bss) {
3238		sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3239		ieee80211_rx_bss_put(local, bss);
3240	}
3241}
3242
3243
3244static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3245					 struct sk_buff *skb)
3246{
3247	struct ieee80211_mgmt *mgmt = (void *)skb->data;
3248	struct ieee80211_if_managed *ifmgd;
3249	struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3250	size_t baselen, len = skb->len;
3251	struct ieee802_11_elems elems;
3252
3253	ifmgd = &sdata->u.mgd;
3254
3255	sdata_assert_lock(sdata);
3256
3257	if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3258		return; /* ignore ProbeResp to foreign address */
3259
3260	baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3261	if (baselen > len)
3262		return;
3263
3264	ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3265			       false, &elems);
3266
3267	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3268
3269	if (ifmgd->associated &&
3270	    ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3271		ieee80211_reset_ap_probe(sdata);
3272}
3273
3274/*
3275 * This is the canonical list of information elements we care about,
3276 * the filter code also gives us all changes to the Microsoft OUI
3277 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3278 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3279 * changes to requested client power.
3280 *
3281 * We implement beacon filtering in software since that means we can
3282 * avoid processing the frame here and in cfg80211, and userspace
3283 * will not be able to tell whether the hardware supports it or not.
3284 *
3285 * XXX: This list needs to be dynamic -- userspace needs to be able to
3286 *	add items it requires. It also needs to be able to tell us to
3287 *	look out for other vendor IEs.
3288 */
3289static const u64 care_about_ies =
3290	(1ULL << WLAN_EID_COUNTRY) |
3291	(1ULL << WLAN_EID_ERP_INFO) |
3292	(1ULL << WLAN_EID_CHANNEL_SWITCH) |
3293	(1ULL << WLAN_EID_PWR_CONSTRAINT) |
3294	(1ULL << WLAN_EID_HT_CAPABILITY) |
3295	(1ULL << WLAN_EID_HT_OPERATION) |
3296	(1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3297
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3298static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3299				     struct ieee80211_mgmt *mgmt, size_t len,
3300				     struct ieee80211_rx_status *rx_status)
3301{
3302	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3303	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3304	size_t baselen;
3305	struct ieee802_11_elems elems;
3306	struct ieee80211_local *local = sdata->local;
3307	struct ieee80211_chanctx_conf *chanctx_conf;
3308	struct ieee80211_channel *chan;
3309	struct sta_info *sta;
3310	u32 changed = 0;
3311	bool erp_valid;
3312	u8 erp_value = 0;
3313	u32 ncrc;
3314	u8 *bssid;
3315	u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3316
3317	sdata_assert_lock(sdata);
3318
3319	/* Process beacon from the current BSS */
3320	baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3321	if (baselen > len)
3322		return;
3323
3324	rcu_read_lock();
3325	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3326	if (!chanctx_conf) {
3327		rcu_read_unlock();
3328		return;
3329	}
3330
3331	if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3332		rcu_read_unlock();
3333		return;
3334	}
3335	chan = chanctx_conf->def.chan;
3336	rcu_read_unlock();
3337
3338	if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3339	    ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3340		ieee802_11_parse_elems(mgmt->u.beacon.variable,
3341				       len - baselen, false, &elems);
3342
3343		ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3344		if (elems.tim && !elems.parse_error) {
3345			const struct ieee80211_tim_ie *tim_ie = elems.tim;
3346			ifmgd->dtim_period = tim_ie->dtim_period;
3347		}
3348		ifmgd->have_beacon = true;
3349		ifmgd->assoc_data->need_beacon = false;
3350		if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3351			sdata->vif.bss_conf.sync_tsf =
3352				le64_to_cpu(mgmt->u.beacon.timestamp);
3353			sdata->vif.bss_conf.sync_device_ts =
3354				rx_status->device_timestamp;
3355			if (elems.tim)
3356				sdata->vif.bss_conf.sync_dtim_count =
3357					elems.tim->dtim_count;
3358			else
3359				sdata->vif.bss_conf.sync_dtim_count = 0;
3360		}
3361		/* continue assoc process */
3362		ifmgd->assoc_data->timeout = jiffies;
3363		ifmgd->assoc_data->timeout_started = true;
3364		run_again(sdata, ifmgd->assoc_data->timeout);
3365		return;
3366	}
3367
3368	if (!ifmgd->associated ||
3369	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3370		return;
3371	bssid = ifmgd->associated->bssid;
3372
3373	/* Track average RSSI from the Beacon frames of the current AP */
3374	if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3375		ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3376		ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3377		ifmgd->last_cqm_event_signal = 0;
3378		ifmgd->count_beacon_signal = 1;
3379		ifmgd->last_ave_beacon_signal = 0;
3380	} else {
3381		ifmgd->count_beacon_signal++;
3382	}
3383
3384	ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3385
3386	if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3387	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3388		int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3389		int last_sig = ifmgd->last_ave_beacon_signal;
3390		struct ieee80211_event event = {
3391			.type = RSSI_EVENT,
3392		};
3393
3394		/*
3395		 * if signal crosses either of the boundaries, invoke callback
3396		 * with appropriate parameters
3397		 */
3398		if (sig > ifmgd->rssi_max_thold &&
3399		    (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3400			ifmgd->last_ave_beacon_signal = sig;
3401			event.u.rssi.data = RSSI_EVENT_HIGH;
3402			drv_event_callback(local, sdata, &event);
3403		} else if (sig < ifmgd->rssi_min_thold &&
3404			   (last_sig >= ifmgd->rssi_max_thold ||
3405			   last_sig == 0)) {
3406			ifmgd->last_ave_beacon_signal = sig;
3407			event.u.rssi.data = RSSI_EVENT_LOW;
3408			drv_event_callback(local, sdata, &event);
3409		}
3410	}
3411
3412	if (bss_conf->cqm_rssi_thold &&
3413	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3414	    !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3415		int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3416		int last_event = ifmgd->last_cqm_event_signal;
3417		int thold = bss_conf->cqm_rssi_thold;
3418		int hyst = bss_conf->cqm_rssi_hyst;
3419
3420		if (sig < thold &&
3421		    (last_event == 0 || sig < last_event - hyst)) {
3422			ifmgd->last_cqm_event_signal = sig;
3423			ieee80211_cqm_rssi_notify(
3424				&sdata->vif,
3425				NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3426				GFP_KERNEL);
3427		} else if (sig > thold &&
3428			   (last_event == 0 || sig > last_event + hyst)) {
3429			ifmgd->last_cqm_event_signal = sig;
3430			ieee80211_cqm_rssi_notify(
3431				&sdata->vif,
3432				NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3433				GFP_KERNEL);
3434		}
3435	}
3436
3437	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3438		mlme_dbg_ratelimited(sdata,
3439				     "cancelling AP probe due to a received beacon\n");
3440		ieee80211_reset_ap_probe(sdata);
3441	}
3442
3443	/*
3444	 * Push the beacon loss detection into the future since
3445	 * we are processing a beacon from the AP just now.
3446	 */
3447	ieee80211_sta_reset_beacon_monitor(sdata);
3448
3449	ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3450	ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3451					  len - baselen, false, &elems,
3452					  care_about_ies, ncrc);
3453
3454	if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3455	    ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3456		if (local->hw.conf.dynamic_ps_timeout > 0) {
3457			if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3458				local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3459				ieee80211_hw_config(local,
3460						    IEEE80211_CONF_CHANGE_PS);
3461			}
3462			ieee80211_send_nullfunc(local, sdata, false);
3463		} else if (!local->pspolling && sdata->u.mgd.powersave) {
3464			local->pspolling = true;
3465
3466			/*
3467			 * Here is assumed that the driver will be
3468			 * able to send ps-poll frame and receive a
3469			 * response even though power save mode is
3470			 * enabled, but some drivers might require
3471			 * to disable power save here. This needs
3472			 * to be investigated.
3473			 */
3474			ieee80211_send_pspoll(local, sdata);
3475		}
3476	}
3477
3478	if (sdata->vif.p2p ||
3479	    sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3480		struct ieee80211_p2p_noa_attr noa = {};
3481		int ret;
3482
3483		ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3484					    len - baselen,
3485					    IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3486					    (u8 *) &noa, sizeof(noa));
3487		if (ret >= 2) {
3488			if (sdata->u.mgd.p2p_noa_index != noa.index) {
3489				/* valid noa_attr and index changed */
3490				sdata->u.mgd.p2p_noa_index = noa.index;
3491				memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3492				changed |= BSS_CHANGED_P2P_PS;
3493				/*
3494				 * make sure we update all information, the CRC
3495				 * mechanism doesn't look at P2P attributes.
3496				 */
3497				ifmgd->beacon_crc_valid = false;
3498			}
3499		} else if (sdata->u.mgd.p2p_noa_index != -1) {
3500			/* noa_attr not found and we had valid noa_attr before */
3501			sdata->u.mgd.p2p_noa_index = -1;
3502			memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3503			changed |= BSS_CHANGED_P2P_PS;
3504			ifmgd->beacon_crc_valid = false;
3505		}
3506	}
3507
3508	if (ifmgd->csa_waiting_bcn)
3509		ieee80211_chswitch_post_beacon(sdata);
3510
3511	/*
3512	 * Update beacon timing and dtim count on every beacon appearance. This
3513	 * will allow the driver to use the most updated values. Do it before
3514	 * comparing this one with last received beacon.
3515	 * IMPORTANT: These parameters would possibly be out of sync by the time
3516	 * the driver will use them. The synchronized view is currently
3517	 * guaranteed only in certain callbacks.
3518	 */
3519	if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3520		sdata->vif.bss_conf.sync_tsf =
3521			le64_to_cpu(mgmt->u.beacon.timestamp);
3522		sdata->vif.bss_conf.sync_device_ts =
3523			rx_status->device_timestamp;
3524		if (elems.tim)
3525			sdata->vif.bss_conf.sync_dtim_count =
3526				elems.tim->dtim_count;
3527		else
3528			sdata->vif.bss_conf.sync_dtim_count = 0;
3529	}
3530
3531	if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3532		return;
3533	ifmgd->beacon_crc = ncrc;
3534	ifmgd->beacon_crc_valid = true;
3535
3536	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3537
3538	ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3539					 rx_status->device_timestamp,
3540					 &elems, true);
3541
3542	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3543	    ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3544				     elems.wmm_param_len))
3545		changed |= BSS_CHANGED_QOS;
3546
3547	/*
3548	 * If we haven't had a beacon before, tell the driver about the
3549	 * DTIM period (and beacon timing if desired) now.
3550	 */
3551	if (!ifmgd->have_beacon) {
3552		/* a few bogus AP send dtim_period = 0 or no TIM IE */
3553		if (elems.tim)
3554			bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3555		else
3556			bss_conf->dtim_period = 1;
3557
3558		changed |= BSS_CHANGED_BEACON_INFO;
3559		ifmgd->have_beacon = true;
3560
3561		mutex_lock(&local->iflist_mtx);
3562		ieee80211_recalc_ps(local);
3563		mutex_unlock(&local->iflist_mtx);
3564
3565		ieee80211_recalc_ps_vif(sdata);
3566	}
3567
3568	if (elems.erp_info) {
3569		erp_valid = true;
3570		erp_value = elems.erp_info[0];
3571	} else {
3572		erp_valid = false;
3573	}
3574	changed |= ieee80211_handle_bss_capability(sdata,
3575			le16_to_cpu(mgmt->u.beacon.capab_info),
3576			erp_valid, erp_value);
3577
3578	mutex_lock(&local->sta_mtx);
3579	sta = sta_info_get(sdata, bssid);
3580
3581	if (ieee80211_config_bw(sdata, sta,
3582				elems.ht_cap_elem, elems.ht_operation,
3583				elems.vht_operation, bssid, &changed)) {
3584		mutex_unlock(&local->sta_mtx);
3585		sdata_info(sdata,
3586			   "failed to follow AP %pM bandwidth change, disconnect\n",
3587			   bssid);
3588		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3589				       WLAN_REASON_DEAUTH_LEAVING,
3590				       true, deauth_buf);
3591		ieee80211_report_disconnect(sdata, deauth_buf,
3592					    sizeof(deauth_buf), true,
3593					    WLAN_REASON_DEAUTH_LEAVING);
3594		return;
3595	}
3596
3597	if (sta && elems.opmode_notif)
3598		ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3599					    rx_status->band);
3600	mutex_unlock(&local->sta_mtx);
3601
3602	changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3603					       elems.country_elem,
3604					       elems.country_elem_len,
3605					       elems.pwr_constr_elem,
3606					       elems.cisco_dtpc_elem);
3607
3608	ieee80211_bss_info_change_notify(sdata, changed);
3609}
3610
3611void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3612				  struct sk_buff *skb)
3613{
3614	struct ieee80211_rx_status *rx_status;
3615	struct ieee80211_mgmt *mgmt;
3616	u16 fc;
3617	struct ieee802_11_elems elems;
3618	int ies_len;
3619
3620	rx_status = (struct ieee80211_rx_status *) skb->cb;
3621	mgmt = (struct ieee80211_mgmt *) skb->data;
3622	fc = le16_to_cpu(mgmt->frame_control);
3623
3624	sdata_lock(sdata);
3625
3626	switch (fc & IEEE80211_FCTL_STYPE) {
3627	case IEEE80211_STYPE_BEACON:
3628		ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3629		break;
3630	case IEEE80211_STYPE_PROBE_RESP:
3631		ieee80211_rx_mgmt_probe_resp(sdata, skb);
3632		break;
3633	case IEEE80211_STYPE_AUTH:
3634		ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3635		break;
3636	case IEEE80211_STYPE_DEAUTH:
3637		ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3638		break;
3639	case IEEE80211_STYPE_DISASSOC:
3640		ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3641		break;
3642	case IEEE80211_STYPE_ASSOC_RESP:
3643	case IEEE80211_STYPE_REASSOC_RESP:
3644		ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3645		break;
3646	case IEEE80211_STYPE_ACTION:
3647		if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3648			ies_len = skb->len -
3649				  offsetof(struct ieee80211_mgmt,
3650					   u.action.u.chan_switch.variable);
3651
3652			if (ies_len < 0)
3653				break;
3654
3655			ieee802_11_parse_elems(
3656				mgmt->u.action.u.chan_switch.variable,
3657				ies_len, true, &elems);
3658
3659			if (elems.parse_error)
3660				break;
3661
3662			ieee80211_sta_process_chanswitch(sdata,
3663						 rx_status->mactime,
3664						 rx_status->device_timestamp,
3665						 &elems, false);
3666		} else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3667			ies_len = skb->len -
3668				  offsetof(struct ieee80211_mgmt,
3669					   u.action.u.ext_chan_switch.variable);
3670
3671			if (ies_len < 0)
3672				break;
3673
3674			ieee802_11_parse_elems(
3675				mgmt->u.action.u.ext_chan_switch.variable,
3676				ies_len, true, &elems);
3677
3678			if (elems.parse_error)
3679				break;
3680
3681			/* for the handling code pretend this was also an IE */
3682			elems.ext_chansw_ie =
3683				&mgmt->u.action.u.ext_chan_switch.data;
3684
3685			ieee80211_sta_process_chanswitch(sdata,
3686						 rx_status->mactime,
3687						 rx_status->device_timestamp,
3688						 &elems, false);
3689		}
3690		break;
3691	}
3692	sdata_unlock(sdata);
3693}
3694
3695static void ieee80211_sta_timer(unsigned long data)
3696{
3697	struct ieee80211_sub_if_data *sdata =
3698		(struct ieee80211_sub_if_data *) data;
3699
3700	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3701}
3702
3703static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3704					  u8 *bssid, u8 reason, bool tx)
3705{
3706	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3707
3708	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3709			       tx, frame_buf);
3710
3711	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3712				    reason);
3713}
3714
3715static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3716{
3717	struct ieee80211_local *local = sdata->local;
3718	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3719	struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3720	u32 tx_flags = 0;
3721	u16 trans = 1;
3722	u16 status = 0;
3723
3724	sdata_assert_lock(sdata);
3725
3726	if (WARN_ON_ONCE(!auth_data))
3727		return -EINVAL;
3728
3729	auth_data->tries++;
3730
3731	if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3732		sdata_info(sdata, "authentication with %pM timed out\n",
3733			   auth_data->bss->bssid);
3734
3735		/*
3736		 * Most likely AP is not in the range so remove the
3737		 * bss struct for that AP.
3738		 */
3739		cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3740
3741		return -ETIMEDOUT;
3742	}
3743
3744	drv_mgd_prepare_tx(local, sdata);
3745
3746	sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3747		   auth_data->bss->bssid, auth_data->tries,
3748		   IEEE80211_AUTH_MAX_TRIES);
3749
3750	auth_data->expected_transaction = 2;
3751
3752	if (auth_data->algorithm == WLAN_AUTH_SAE) {
3753		trans = auth_data->sae_trans;
3754		status = auth_data->sae_status;
3755		auth_data->expected_transaction = trans;
3756	}
3757
3758	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3759		tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3760			   IEEE80211_TX_INTFL_MLME_CONN_TX;
3761
3762	ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3763			    auth_data->data, auth_data->data_len,
3764			    auth_data->bss->bssid,
3765			    auth_data->bss->bssid, NULL, 0, 0,
3766			    tx_flags);
3767
3768	if (tx_flags == 0) {
3769		auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3770		auth_data->timeout_started = true;
3771		run_again(sdata, auth_data->timeout);
 
 
3772	} else {
3773		auth_data->timeout =
3774			round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3775		auth_data->timeout_started = true;
3776		run_again(sdata, auth_data->timeout);
3777	}
3778
 
 
 
3779	return 0;
3780}
3781
3782static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3783{
3784	struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3785	struct ieee80211_local *local = sdata->local;
3786
3787	sdata_assert_lock(sdata);
3788
3789	assoc_data->tries++;
3790	if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3791		sdata_info(sdata, "association with %pM timed out\n",
3792			   assoc_data->bss->bssid);
3793
3794		/*
3795		 * Most likely AP is not in the range so remove the
3796		 * bss struct for that AP.
3797		 */
3798		cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3799
3800		return -ETIMEDOUT;
3801	}
3802
3803	sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3804		   assoc_data->bss->bssid, assoc_data->tries,
3805		   IEEE80211_ASSOC_MAX_TRIES);
3806	ieee80211_send_assoc(sdata);
3807
3808	if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3809		assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3810		assoc_data->timeout_started = true;
3811		run_again(sdata, assoc_data->timeout);
3812	} else {
3813		assoc_data->timeout =
3814			round_jiffies_up(jiffies +
3815					 IEEE80211_ASSOC_TIMEOUT_LONG);
3816		assoc_data->timeout_started = true;
3817		run_again(sdata, assoc_data->timeout);
3818	}
3819
3820	return 0;
3821}
3822
3823void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3824				  __le16 fc, bool acked)
3825{
3826	struct ieee80211_local *local = sdata->local;
3827
3828	sdata->u.mgd.status_fc = fc;
3829	sdata->u.mgd.status_acked = acked;
3830	sdata->u.mgd.status_received = true;
3831
3832	ieee80211_queue_work(&local->hw, &sdata->work);
3833}
3834
3835void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3836{
3837	struct ieee80211_local *local = sdata->local;
3838	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3839
3840	sdata_lock(sdata);
3841
3842	if (ifmgd->status_received) {
3843		__le16 fc = ifmgd->status_fc;
3844		bool status_acked = ifmgd->status_acked;
3845
3846		ifmgd->status_received = false;
3847		if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3848			if (status_acked) {
3849				ifmgd->auth_data->timeout =
3850					jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
 
 
 
 
 
 
 
3851				run_again(sdata, ifmgd->auth_data->timeout);
3852			} else {
3853				ifmgd->auth_data->timeout = jiffies - 1;
3854			}
3855			ifmgd->auth_data->timeout_started = true;
3856		} else if (ifmgd->assoc_data &&
3857			   (ieee80211_is_assoc_req(fc) ||
3858			    ieee80211_is_reassoc_req(fc))) {
3859			if (status_acked) {
3860				ifmgd->assoc_data->timeout =
3861					jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3862				run_again(sdata, ifmgd->assoc_data->timeout);
3863			} else {
3864				ifmgd->assoc_data->timeout = jiffies - 1;
3865			}
3866			ifmgd->assoc_data->timeout_started = true;
3867		}
3868	}
3869
3870	if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3871	    time_after(jiffies, ifmgd->auth_data->timeout)) {
3872		if (ifmgd->auth_data->done) {
3873			/*
3874			 * ok ... we waited for assoc but userspace didn't,
3875			 * so let's just kill the auth data
3876			 */
3877			ieee80211_destroy_auth_data(sdata, false);
3878		} else if (ieee80211_auth(sdata)) {
3879			u8 bssid[ETH_ALEN];
3880			struct ieee80211_event event = {
3881				.type = MLME_EVENT,
3882				.u.mlme.data = AUTH_EVENT,
3883				.u.mlme.status = MLME_TIMEOUT,
3884			};
3885
3886			memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3887
3888			ieee80211_destroy_auth_data(sdata, false);
3889
3890			cfg80211_auth_timeout(sdata->dev, bssid);
3891			drv_event_callback(sdata->local, sdata, &event);
3892		}
3893	} else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3894		run_again(sdata, ifmgd->auth_data->timeout);
3895
3896	if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3897	    time_after(jiffies, ifmgd->assoc_data->timeout)) {
3898		if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3899		    ieee80211_do_assoc(sdata)) {
3900			struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3901			struct ieee80211_event event = {
3902				.type = MLME_EVENT,
3903				.u.mlme.data = ASSOC_EVENT,
3904				.u.mlme.status = MLME_TIMEOUT,
3905			};
3906
3907			ieee80211_destroy_assoc_data(sdata, false, false);
3908			cfg80211_assoc_timeout(sdata->dev, bss);
3909			drv_event_callback(sdata->local, sdata, &event);
3910		}
3911	} else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3912		run_again(sdata, ifmgd->assoc_data->timeout);
3913
3914	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3915	    ifmgd->associated) {
3916		u8 bssid[ETH_ALEN];
3917		int max_tries;
3918
3919		memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3920
3921		if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3922			max_tries = max_nullfunc_tries;
3923		else
3924			max_tries = max_probe_tries;
3925
3926		/* ACK received for nullfunc probing frame */
3927		if (!ifmgd->probe_send_count)
3928			ieee80211_reset_ap_probe(sdata);
3929		else if (ifmgd->nullfunc_failed) {
3930			if (ifmgd->probe_send_count < max_tries) {
3931				mlme_dbg(sdata,
3932					 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3933					 bssid, ifmgd->probe_send_count,
3934					 max_tries);
3935				ieee80211_mgd_probe_ap_send(sdata);
3936			} else {
3937				mlme_dbg(sdata,
3938					 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3939					 bssid);
3940				ieee80211_sta_connection_lost(sdata, bssid,
3941					WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3942					false);
3943			}
3944		} else if (time_is_after_jiffies(ifmgd->probe_timeout))
3945			run_again(sdata, ifmgd->probe_timeout);
3946		else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3947			mlme_dbg(sdata,
3948				 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3949				 bssid, probe_wait_ms);
3950			ieee80211_sta_connection_lost(sdata, bssid,
3951				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3952		} else if (ifmgd->probe_send_count < max_tries) {
3953			mlme_dbg(sdata,
3954				 "No probe response from AP %pM after %dms, try %d/%i\n",
3955				 bssid, probe_wait_ms,
3956				 ifmgd->probe_send_count, max_tries);
3957			ieee80211_mgd_probe_ap_send(sdata);
3958		} else {
3959			/*
3960			 * We actually lost the connection ... or did we?
3961			 * Let's make sure!
3962			 */
3963			mlme_dbg(sdata,
3964				 "No probe response from AP %pM after %dms, disconnecting.\n",
3965				 bssid, probe_wait_ms);
3966
3967			ieee80211_sta_connection_lost(sdata, bssid,
3968				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3969		}
3970	}
3971
3972	sdata_unlock(sdata);
3973}
3974
3975static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3976{
3977	struct ieee80211_sub_if_data *sdata =
3978		(struct ieee80211_sub_if_data *) data;
3979	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3980
3981	if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3982		return;
3983
3984	sdata->u.mgd.connection_loss = false;
3985	ieee80211_queue_work(&sdata->local->hw,
3986			     &sdata->u.mgd.beacon_connection_loss_work);
3987}
3988
3989static void ieee80211_sta_conn_mon_timer(unsigned long data)
3990{
3991	struct ieee80211_sub_if_data *sdata =
3992		(struct ieee80211_sub_if_data *) data;
3993	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3994	struct ieee80211_local *local = sdata->local;
3995
3996	if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3997		return;
3998
3999	ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4000}
4001
4002static void ieee80211_sta_monitor_work(struct work_struct *work)
4003{
4004	struct ieee80211_sub_if_data *sdata =
4005		container_of(work, struct ieee80211_sub_if_data,
4006			     u.mgd.monitor_work);
4007
4008	ieee80211_mgd_probe_ap(sdata, false);
4009}
4010
4011static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4012{
4013	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4014		__ieee80211_stop_poll(sdata);
4015
4016		/* let's probe the connection once */
4017		if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4018			ieee80211_queue_work(&sdata->local->hw,
4019					     &sdata->u.mgd.monitor_work);
4020	}
4021}
4022
4023#ifdef CONFIG_PM
4024void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4025{
4026	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4027	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4028
4029	sdata_lock(sdata);
4030
4031	if (ifmgd->auth_data || ifmgd->assoc_data) {
4032		const u8 *bssid = ifmgd->auth_data ?
4033				ifmgd->auth_data->bss->bssid :
4034				ifmgd->assoc_data->bss->bssid;
4035
4036		/*
4037		 * If we are trying to authenticate / associate while suspending,
4038		 * cfg80211 won't know and won't actually abort those attempts,
4039		 * thus we need to do that ourselves.
4040		 */
4041		ieee80211_send_deauth_disassoc(sdata, bssid,
4042					       IEEE80211_STYPE_DEAUTH,
4043					       WLAN_REASON_DEAUTH_LEAVING,
4044					       false, frame_buf);
4045		if (ifmgd->assoc_data)
4046			ieee80211_destroy_assoc_data(sdata, false, true);
4047		if (ifmgd->auth_data)
4048			ieee80211_destroy_auth_data(sdata, false);
4049		cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4050				      IEEE80211_DEAUTH_FRAME_LEN);
4051	}
4052
4053	/* This is a bit of a hack - we should find a better and more generic
4054	 * solution to this. Normally when suspending, cfg80211 will in fact
4055	 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4056	 * auth (not so important) or assoc (this is the problem) process.
4057	 *
4058	 * As a consequence, it can happen that we are in the process of both
4059	 * associating and suspending, and receive an association response
4060	 * after cfg80211 has checked if it needs to disconnect, but before
4061	 * we actually set the flag to drop incoming frames. This will then
4062	 * cause the workqueue flush to process the association response in
4063	 * the suspend, resulting in a successful association just before it
4064	 * tries to remove the interface from the driver, which now though
4065	 * has a channel context assigned ... this results in issues.
4066	 *
4067	 * To work around this (for now) simply deauth here again if we're
4068	 * now connected.
4069	 */
4070	if (ifmgd->associated && !sdata->local->wowlan) {
4071		u8 bssid[ETH_ALEN];
4072		struct cfg80211_deauth_request req = {
4073			.reason_code = WLAN_REASON_DEAUTH_LEAVING,
4074			.bssid = bssid,
4075		};
4076
4077		memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4078		ieee80211_mgd_deauth(sdata, &req);
4079	}
4080
4081	sdata_unlock(sdata);
4082}
4083
4084void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4085{
4086	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4087
4088	sdata_lock(sdata);
4089	if (!ifmgd->associated) {
4090		sdata_unlock(sdata);
4091		return;
4092	}
4093
4094	if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4095		sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4096		mlme_dbg(sdata, "driver requested disconnect after resume\n");
4097		ieee80211_sta_connection_lost(sdata,
4098					      ifmgd->associated->bssid,
4099					      WLAN_REASON_UNSPECIFIED,
4100					      true);
4101		sdata_unlock(sdata);
4102		return;
4103	}
4104	sdata_unlock(sdata);
4105}
4106#endif
4107
4108/* interface setup */
4109void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4110{
4111	struct ieee80211_if_managed *ifmgd;
4112
4113	ifmgd = &sdata->u.mgd;
4114	INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4115	INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4116	INIT_WORK(&ifmgd->beacon_connection_loss_work,
4117		  ieee80211_beacon_connection_loss_work);
4118	INIT_WORK(&ifmgd->csa_connection_drop_work,
4119		  ieee80211_csa_connection_drop_work);
4120	INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4121	INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4122			  ieee80211_tdls_peer_del_work);
4123	setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4124		    (unsigned long) sdata);
4125	setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4126		    (unsigned long) sdata);
4127	setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4128		    (unsigned long) sdata);
4129	setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4130		    (unsigned long) sdata);
4131	INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4132			  ieee80211_sta_handle_tspec_ac_params_wk);
4133
4134	ifmgd->flags = 0;
4135	ifmgd->powersave = sdata->wdev.ps;
4136	ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4137	ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4138	ifmgd->p2p_noa_index = -1;
4139
4140	if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4141		ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4142	else
4143		ifmgd->req_smps = IEEE80211_SMPS_OFF;
4144
4145	/* Setup TDLS data */
4146	spin_lock_init(&ifmgd->teardown_lock);
4147	ifmgd->teardown_skb = NULL;
4148	ifmgd->orig_teardown_skb = NULL;
4149}
4150
4151/* scan finished notification */
4152void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4153{
4154	struct ieee80211_sub_if_data *sdata;
4155
4156	/* Restart STA timers */
4157	rcu_read_lock();
4158	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4159		if (ieee80211_sdata_running(sdata))
4160			ieee80211_restart_sta_timer(sdata);
4161	}
4162	rcu_read_unlock();
4163}
4164
4165static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4166				     struct cfg80211_bss *cbss)
4167{
4168	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4169	const u8 *ht_cap_ie, *vht_cap_ie;
4170	const struct ieee80211_ht_cap *ht_cap;
4171	const struct ieee80211_vht_cap *vht_cap;
4172	u8 chains = 1;
4173
4174	if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4175		return chains;
4176
4177	ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4178	if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4179		ht_cap = (void *)(ht_cap_ie + 2);
4180		chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4181		/*
4182		 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4183		 *	 "Tx Unequal Modulation Supported" fields.
4184		 */
4185	}
4186
4187	if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4188		return chains;
4189
4190	vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4191	if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4192		u8 nss;
4193		u16 tx_mcs_map;
4194
4195		vht_cap = (void *)(vht_cap_ie + 2);
4196		tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4197		for (nss = 8; nss > 0; nss--) {
4198			if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4199					IEEE80211_VHT_MCS_NOT_SUPPORTED)
4200				break;
4201		}
4202		/* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4203		chains = max(chains, nss);
4204	}
4205
4206	return chains;
4207}
4208
4209static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4210				  struct cfg80211_bss *cbss)
4211{
4212	struct ieee80211_local *local = sdata->local;
4213	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4214	const struct ieee80211_ht_cap *ht_cap = NULL;
4215	const struct ieee80211_ht_operation *ht_oper = NULL;
4216	const struct ieee80211_vht_operation *vht_oper = NULL;
4217	struct ieee80211_supported_band *sband;
4218	struct cfg80211_chan_def chandef;
4219	int ret;
4220	u32 i;
4221	bool have_80mhz;
4222
4223	sband = local->hw.wiphy->bands[cbss->channel->band];
4224
4225	ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4226			  IEEE80211_STA_DISABLE_80P80MHZ |
4227			  IEEE80211_STA_DISABLE_160MHZ);
4228
4229	rcu_read_lock();
4230
4231	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4232	    sband->ht_cap.ht_supported) {
4233		const u8 *ht_oper_ie, *ht_cap_ie;
4234
4235		ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4236		if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4237			ht_oper = (void *)(ht_oper_ie + 2);
4238
4239		ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4240		if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4241			ht_cap = (void *)(ht_cap_ie + 2);
4242
4243		if (!ht_cap) {
4244			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4245			ht_oper = NULL;
4246		}
4247	}
4248
4249	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4250	    sband->vht_cap.vht_supported) {
4251		const u8 *vht_oper_ie, *vht_cap;
4252
4253		vht_oper_ie = ieee80211_bss_get_ie(cbss,
4254						   WLAN_EID_VHT_OPERATION);
4255		if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4256			vht_oper = (void *)(vht_oper_ie + 2);
4257		if (vht_oper && !ht_oper) {
4258			vht_oper = NULL;
4259			sdata_info(sdata,
4260				   "AP advertised VHT without HT, disabling both\n");
4261			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4262			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4263		}
4264
4265		vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4266		if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4267			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4268			vht_oper = NULL;
4269		}
4270	}
4271
4272	/* Allow VHT if at least one channel on the sband supports 80 MHz */
4273	have_80mhz = false;
4274	for (i = 0; i < sband->n_channels; i++) {
4275		if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4276						IEEE80211_CHAN_NO_80MHZ))
4277			continue;
4278
4279		have_80mhz = true;
4280		break;
4281	}
4282
4283	if (!have_80mhz)
4284		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4285
4286	ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4287						     cbss->channel,
4288						     ht_cap, ht_oper, vht_oper,
4289						     &chandef, false);
4290
4291	sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4292				      local->rx_chains);
4293
4294	rcu_read_unlock();
4295
4296	/* will change later if needed */
4297	sdata->smps_mode = IEEE80211_SMPS_OFF;
4298
4299	mutex_lock(&local->mtx);
4300	/*
4301	 * If this fails (possibly due to channel context sharing
4302	 * on incompatible channels, e.g. 80+80 and 160 sharing the
4303	 * same control channel) try to use a smaller bandwidth.
4304	 */
4305	ret = ieee80211_vif_use_channel(sdata, &chandef,
4306					IEEE80211_CHANCTX_SHARED);
4307
4308	/* don't downgrade for 5 and 10 MHz channels, though. */
4309	if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4310	    chandef.width == NL80211_CHAN_WIDTH_10)
4311		goto out;
4312
4313	while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4314		ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4315		ret = ieee80211_vif_use_channel(sdata, &chandef,
4316						IEEE80211_CHANCTX_SHARED);
4317	}
4318 out:
4319	mutex_unlock(&local->mtx);
4320	return ret;
4321}
4322
4323static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4324				     struct cfg80211_bss *cbss, bool assoc,
4325				     bool override)
4326{
4327	struct ieee80211_local *local = sdata->local;
4328	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4329	struct ieee80211_bss *bss = (void *)cbss->priv;
4330	struct sta_info *new_sta = NULL;
4331	struct ieee80211_supported_band *sband;
4332	bool have_sta = false;
4333	int err;
4334
4335	sband = local->hw.wiphy->bands[cbss->channel->band];
4336
4337	if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4338		return -EINVAL;
4339
 
 
 
 
4340	if (assoc) {
4341		rcu_read_lock();
4342		have_sta = sta_info_get(sdata, cbss->bssid);
4343		rcu_read_unlock();
4344	}
4345
4346	if (!have_sta) {
4347		new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4348		if (!new_sta)
4349			return -ENOMEM;
4350	}
4351
4352	if (new_sta || override) {
4353		err = ieee80211_prep_channel(sdata, cbss);
4354		if (err) {
4355			if (new_sta)
4356				sta_info_free(local, new_sta);
4357			return -EINVAL;
4358		}
4359	}
4360
 
 
 
 
4361	if (new_sta) {
4362		u32 rates = 0, basic_rates = 0;
4363		bool have_higher_than_11mbit;
4364		int min_rate = INT_MAX, min_rate_index = -1;
4365		struct ieee80211_chanctx_conf *chanctx_conf;
4366		const struct cfg80211_bss_ies *ies;
4367		int shift = ieee80211_vif_get_shift(&sdata->vif);
4368		u32 rate_flags;
4369
4370		rcu_read_lock();
4371		chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4372		if (WARN_ON(!chanctx_conf)) {
4373			rcu_read_unlock();
4374			sta_info_free(local, new_sta);
4375			return -EINVAL;
4376		}
4377		rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4378		rcu_read_unlock();
4379
4380		ieee80211_get_rates(sband, bss->supp_rates,
4381				    bss->supp_rates_len,
4382				    &rates, &basic_rates,
4383				    &have_higher_than_11mbit,
4384				    &min_rate, &min_rate_index,
4385				    shift, rate_flags);
4386
4387		/*
4388		 * This used to be a workaround for basic rates missing
4389		 * in the association response frame. Now that we no
4390		 * longer use the basic rates from there, it probably
4391		 * doesn't happen any more, but keep the workaround so
4392		 * in case some *other* APs are buggy in different ways
4393		 * we can connect -- with a warning.
4394		 */
4395		if (!basic_rates && min_rate_index >= 0) {
4396			sdata_info(sdata,
4397				   "No basic rates, using min rate instead\n");
4398			basic_rates = BIT(min_rate_index);
4399		}
4400
4401		new_sta->sta.supp_rates[cbss->channel->band] = rates;
4402		sdata->vif.bss_conf.basic_rates = basic_rates;
4403
4404		/* cf. IEEE 802.11 9.2.12 */
4405		if (cbss->channel->band == NL80211_BAND_2GHZ &&
4406		    have_higher_than_11mbit)
4407			sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4408		else
4409			sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4410
4411		memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4412
4413		/* set timing information */
4414		sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4415		rcu_read_lock();
4416		ies = rcu_dereference(cbss->beacon_ies);
4417		if (ies) {
4418			const u8 *tim_ie;
4419
4420			sdata->vif.bss_conf.sync_tsf = ies->tsf;
4421			sdata->vif.bss_conf.sync_device_ts =
4422				bss->device_ts_beacon;
4423			tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4424						  ies->data, ies->len);
4425			if (tim_ie && tim_ie[1] >= 2)
4426				sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4427			else
4428				sdata->vif.bss_conf.sync_dtim_count = 0;
4429		} else if (!ieee80211_hw_check(&sdata->local->hw,
4430					       TIMING_BEACON_ONLY)) {
4431			ies = rcu_dereference(cbss->proberesp_ies);
4432			/* must be non-NULL since beacon IEs were NULL */
4433			sdata->vif.bss_conf.sync_tsf = ies->tsf;
4434			sdata->vif.bss_conf.sync_device_ts =
4435				bss->device_ts_presp;
4436			sdata->vif.bss_conf.sync_dtim_count = 0;
4437		} else {
4438			sdata->vif.bss_conf.sync_tsf = 0;
4439			sdata->vif.bss_conf.sync_device_ts = 0;
4440			sdata->vif.bss_conf.sync_dtim_count = 0;
4441		}
4442		rcu_read_unlock();
 
4443
4444		/* tell driver about BSSID, basic rates and timing */
 
 
 
 
 
 
 
 
 
 
 
 
 
4445		ieee80211_bss_info_change_notify(sdata,
4446			BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4447			BSS_CHANGED_BEACON_INT);
4448
4449		if (assoc)
4450			sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4451
4452		err = sta_info_insert(new_sta);
4453		new_sta = NULL;
4454		if (err) {
4455			sdata_info(sdata,
4456				   "failed to insert STA entry for the AP (error %d)\n",
4457				   err);
4458			return err;
4459		}
4460	} else
4461		WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4462
4463	/* Cancel scan to ensure that nothing interferes with connection */
4464	if (local->scanning)
4465		ieee80211_scan_cancel(local);
4466
4467	return 0;
4468}
4469
4470/* config hooks */
4471int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4472		       struct cfg80211_auth_request *req)
4473{
4474	struct ieee80211_local *local = sdata->local;
4475	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4476	struct ieee80211_mgd_auth_data *auth_data;
4477	u16 auth_alg;
4478	int err;
4479
4480	/* prepare auth data structure */
4481
4482	switch (req->auth_type) {
4483	case NL80211_AUTHTYPE_OPEN_SYSTEM:
4484		auth_alg = WLAN_AUTH_OPEN;
4485		break;
4486	case NL80211_AUTHTYPE_SHARED_KEY:
4487		if (IS_ERR(local->wep_tx_tfm))
4488			return -EOPNOTSUPP;
4489		auth_alg = WLAN_AUTH_SHARED_KEY;
4490		break;
4491	case NL80211_AUTHTYPE_FT:
4492		auth_alg = WLAN_AUTH_FT;
4493		break;
4494	case NL80211_AUTHTYPE_NETWORK_EAP:
4495		auth_alg = WLAN_AUTH_LEAP;
4496		break;
4497	case NL80211_AUTHTYPE_SAE:
4498		auth_alg = WLAN_AUTH_SAE;
4499		break;
4500	case NL80211_AUTHTYPE_FILS_SK:
4501		auth_alg = WLAN_AUTH_FILS_SK;
4502		break;
4503	case NL80211_AUTHTYPE_FILS_SK_PFS:
4504		auth_alg = WLAN_AUTH_FILS_SK_PFS;
4505		break;
4506	case NL80211_AUTHTYPE_FILS_PK:
4507		auth_alg = WLAN_AUTH_FILS_PK;
4508		break;
4509	default:
4510		return -EOPNOTSUPP;
4511	}
4512
4513	auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4514			    req->ie_len, GFP_KERNEL);
4515	if (!auth_data)
4516		return -ENOMEM;
4517
4518	auth_data->bss = req->bss;
4519
4520	if (req->auth_data_len >= 4) {
4521		if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4522			__le16 *pos = (__le16 *) req->auth_data;
4523
4524			auth_data->sae_trans = le16_to_cpu(pos[0]);
4525			auth_data->sae_status = le16_to_cpu(pos[1]);
4526		}
4527		memcpy(auth_data->data, req->auth_data + 4,
4528		       req->auth_data_len - 4);
4529		auth_data->data_len += req->auth_data_len - 4;
4530	}
4531
4532	if (req->ie && req->ie_len) {
4533		memcpy(&auth_data->data[auth_data->data_len],
4534		       req->ie, req->ie_len);
4535		auth_data->data_len += req->ie_len;
4536	}
4537
4538	if (req->key && req->key_len) {
4539		auth_data->key_len = req->key_len;
4540		auth_data->key_idx = req->key_idx;
4541		memcpy(auth_data->key, req->key, req->key_len);
4542	}
4543
4544	auth_data->algorithm = auth_alg;
4545
4546	/* try to authenticate/probe */
4547
4548	if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4549	    ifmgd->assoc_data) {
4550		err = -EBUSY;
4551		goto err_free;
4552	}
4553
4554	if (ifmgd->auth_data)
4555		ieee80211_destroy_auth_data(sdata, false);
4556
4557	/* prep auth_data so we don't go into idle on disassoc */
4558	ifmgd->auth_data = auth_data;
4559
4560	if (ifmgd->associated) {
4561		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4562
4563		sdata_info(sdata,
4564			   "disconnect from AP %pM for new auth to %pM\n",
4565			   ifmgd->associated->bssid, req->bss->bssid);
4566		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4567				       WLAN_REASON_UNSPECIFIED,
4568				       false, frame_buf);
4569
4570		ieee80211_report_disconnect(sdata, frame_buf,
4571					    sizeof(frame_buf), true,
4572					    WLAN_REASON_UNSPECIFIED);
4573	}
4574
4575	sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4576
4577	err = ieee80211_prep_connection(sdata, req->bss, false, false);
4578	if (err)
4579		goto err_clear;
4580
4581	err = ieee80211_auth(sdata);
4582	if (err) {
4583		sta_info_destroy_addr(sdata, req->bss->bssid);
4584		goto err_clear;
4585	}
4586
4587	/* hold our own reference */
4588	cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4589	return 0;
4590
4591 err_clear:
4592	eth_zero_addr(ifmgd->bssid);
4593	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4594	ifmgd->auth_data = NULL;
4595	mutex_lock(&sdata->local->mtx);
4596	ieee80211_vif_release_channel(sdata);
4597	mutex_unlock(&sdata->local->mtx);
4598 err_free:
4599	kfree(auth_data);
4600	return err;
4601}
4602
4603int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4604			struct cfg80211_assoc_request *req)
4605{
4606	struct ieee80211_local *local = sdata->local;
4607	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4608	struct ieee80211_bss *bss = (void *)req->bss->priv;
4609	struct ieee80211_mgd_assoc_data *assoc_data;
4610	const struct cfg80211_bss_ies *beacon_ies;
4611	struct ieee80211_supported_band *sband;
4612	const u8 *ssidie, *ht_ie, *vht_ie;
4613	int i, err;
4614	bool override = false;
4615
4616	assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4617	if (!assoc_data)
4618		return -ENOMEM;
4619
4620	rcu_read_lock();
4621	ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4622	if (!ssidie) {
4623		rcu_read_unlock();
4624		kfree(assoc_data);
4625		return -EINVAL;
4626	}
4627	memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4628	assoc_data->ssid_len = ssidie[1];
4629	rcu_read_unlock();
4630
4631	if (ifmgd->associated) {
4632		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4633
4634		sdata_info(sdata,
4635			   "disconnect from AP %pM for new assoc to %pM\n",
4636			   ifmgd->associated->bssid, req->bss->bssid);
4637		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4638				       WLAN_REASON_UNSPECIFIED,
4639				       false, frame_buf);
4640
4641		ieee80211_report_disconnect(sdata, frame_buf,
4642					    sizeof(frame_buf), true,
4643					    WLAN_REASON_UNSPECIFIED);
4644	}
4645
4646	if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4647		err = -EBUSY;
4648		goto err_free;
4649	}
4650
4651	if (ifmgd->assoc_data) {
4652		err = -EBUSY;
4653		goto err_free;
4654	}
4655
4656	if (ifmgd->auth_data) {
4657		bool match;
4658
4659		/* keep sta info, bssid if matching */
4660		match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4661		ieee80211_destroy_auth_data(sdata, match);
4662	}
4663
4664	/* prepare assoc data */
4665
4666	ifmgd->beacon_crc_valid = false;
4667
4668	assoc_data->wmm = bss->wmm_used &&
4669			  (local->hw.queues >= IEEE80211_NUM_ACS);
4670
4671	/*
4672	 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4673	 * We still associate in non-HT mode (11a/b/g) if any one of these
4674	 * ciphers is configured as pairwise.
4675	 * We can set this to true for non-11n hardware, that'll be checked
4676	 * separately along with the peer capabilities.
4677	 */
4678	for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4679		if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4680		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4681		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4682			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4683			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4684			netdev_info(sdata->dev,
4685				    "disabling HT/VHT due to WEP/TKIP use\n");
4686		}
4687	}
4688
4689	/* Also disable HT if we don't support it or the AP doesn't use WMM */
4690	sband = local->hw.wiphy->bands[req->bss->channel->band];
4691	if (!sband->ht_cap.ht_supported ||
4692	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4693	    ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4694		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4695		if (!bss->wmm_used &&
4696		    !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4697			netdev_info(sdata->dev,
4698				    "disabling HT as WMM/QoS is not supported by the AP\n");
4699	}
4700
4701	/* disable VHT if we don't support it or the AP doesn't use WMM */
4702	if (!sband->vht_cap.vht_supported ||
4703	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4704	    ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4705		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4706		if (!bss->wmm_used &&
4707		    !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4708			netdev_info(sdata->dev,
4709				    "disabling VHT as WMM/QoS is not supported by the AP\n");
4710	}
4711
4712	memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4713	memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4714	       sizeof(ifmgd->ht_capa_mask));
4715
4716	memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4717	memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4718	       sizeof(ifmgd->vht_capa_mask));
4719
4720	if (req->ie && req->ie_len) {
4721		memcpy(assoc_data->ie, req->ie, req->ie_len);
4722		assoc_data->ie_len = req->ie_len;
4723	}
4724
4725	if (req->fils_kek) {
4726		/* should already be checked in cfg80211 - so warn */
4727		if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4728			err = -EINVAL;
4729			goto err_free;
4730		}
4731		memcpy(assoc_data->fils_kek, req->fils_kek,
4732		       req->fils_kek_len);
4733		assoc_data->fils_kek_len = req->fils_kek_len;
4734	}
4735
4736	if (req->fils_nonces)
4737		memcpy(assoc_data->fils_nonces, req->fils_nonces,
4738		       2 * FILS_NONCE_LEN);
4739
4740	assoc_data->bss = req->bss;
4741
4742	if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4743		if (ifmgd->powersave)
4744			sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4745		else
4746			sdata->smps_mode = IEEE80211_SMPS_OFF;
4747	} else
4748		sdata->smps_mode = ifmgd->req_smps;
4749
4750	assoc_data->capability = req->bss->capability;
4751	assoc_data->supp_rates = bss->supp_rates;
4752	assoc_data->supp_rates_len = bss->supp_rates_len;
4753
4754	rcu_read_lock();
4755	ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4756	if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4757		assoc_data->ap_ht_param =
4758			((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4759	else
4760		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4761	vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4762	if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4763		memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4764		       sizeof(struct ieee80211_vht_cap));
4765	else
4766		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4767	rcu_read_unlock();
4768
4769	if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4770		 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4771	     "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4772		sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4773
4774	if (bss->wmm_used && bss->uapsd_supported &&
4775	    (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4776		assoc_data->uapsd = true;
4777		ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4778	} else {
4779		assoc_data->uapsd = false;
4780		ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4781	}
4782
4783	if (req->prev_bssid)
4784		memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4785
4786	if (req->use_mfp) {
4787		ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4788		ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4789	} else {
4790		ifmgd->mfp = IEEE80211_MFP_DISABLED;
4791		ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4792	}
4793
4794	if (req->flags & ASSOC_REQ_USE_RRM)
4795		ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4796	else
4797		ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4798
4799	if (req->crypto.control_port)
4800		ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4801	else
4802		ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4803
4804	sdata->control_port_protocol = req->crypto.control_port_ethertype;
4805	sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
 
 
4806	sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4807							sdata->vif.type);
4808
4809	/* kick off associate process */
4810
4811	ifmgd->assoc_data = assoc_data;
4812	ifmgd->dtim_period = 0;
4813	ifmgd->have_beacon = false;
4814
4815	/* override HT/VHT configuration only if the AP and we support it */
4816	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4817		struct ieee80211_sta_ht_cap sta_ht_cap;
4818
4819		if (req->flags & ASSOC_REQ_DISABLE_HT)
4820			override = true;
4821
4822		memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4823		ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4824
4825		/* check for 40 MHz disable override */
4826		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4827		    sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4828		    !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4829			override = true;
4830
4831		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4832		    req->flags & ASSOC_REQ_DISABLE_VHT)
4833			override = true;
4834	}
4835
4836	if (req->flags & ASSOC_REQ_DISABLE_HT) {
4837		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4838		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4839	}
4840
4841	if (req->flags & ASSOC_REQ_DISABLE_VHT)
4842		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4843
4844	err = ieee80211_prep_connection(sdata, req->bss, true, override);
4845	if (err)
4846		goto err_clear;
4847
4848	rcu_read_lock();
4849	beacon_ies = rcu_dereference(req->bss->beacon_ies);
4850
4851	if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4852	    !beacon_ies) {
4853		/*
4854		 * Wait up to one beacon interval ...
4855		 * should this be more if we miss one?
4856		 */
4857		sdata_info(sdata, "waiting for beacon from %pM\n",
4858			   ifmgd->bssid);
4859		assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4860		assoc_data->timeout_started = true;
4861		assoc_data->need_beacon = true;
4862	} else if (beacon_ies) {
4863		const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4864						    beacon_ies->data,
4865						    beacon_ies->len);
4866		u8 dtim_count = 0;
4867
4868		if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4869			const struct ieee80211_tim_ie *tim;
4870			tim = (void *)(tim_ie + 2);
4871			ifmgd->dtim_period = tim->dtim_period;
4872			dtim_count = tim->dtim_count;
4873		}
4874		ifmgd->have_beacon = true;
4875		assoc_data->timeout = jiffies;
4876		assoc_data->timeout_started = true;
4877
4878		if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4879			sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4880			sdata->vif.bss_conf.sync_device_ts =
4881				bss->device_ts_beacon;
4882			sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4883		}
4884	} else {
4885		assoc_data->timeout = jiffies;
4886		assoc_data->timeout_started = true;
4887	}
4888	rcu_read_unlock();
4889
4890	run_again(sdata, assoc_data->timeout);
4891
4892	if (bss->corrupt_data) {
4893		char *corrupt_type = "data";
4894		if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4895			if (bss->corrupt_data &
4896					IEEE80211_BSS_CORRUPT_PROBE_RESP)
4897				corrupt_type = "beacon and probe response";
4898			else
4899				corrupt_type = "beacon";
4900		} else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4901			corrupt_type = "probe response";
4902		sdata_info(sdata, "associating with AP with corrupt %s\n",
4903			   corrupt_type);
4904	}
4905
4906	return 0;
4907 err_clear:
4908	eth_zero_addr(ifmgd->bssid);
4909	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4910	ifmgd->assoc_data = NULL;
4911 err_free:
4912	kfree(assoc_data);
4913	return err;
4914}
4915
4916int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4917			 struct cfg80211_deauth_request *req)
4918{
4919	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4920	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4921	bool tx = !req->local_state_change;
4922
4923	if (ifmgd->auth_data &&
4924	    ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4925		sdata_info(sdata,
4926			   "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4927			   req->bssid, req->reason_code,
4928			   ieee80211_get_reason_code_string(req->reason_code));
4929
4930		drv_mgd_prepare_tx(sdata->local, sdata);
4931		ieee80211_send_deauth_disassoc(sdata, req->bssid,
4932					       IEEE80211_STYPE_DEAUTH,
4933					       req->reason_code, tx,
4934					       frame_buf);
4935		ieee80211_destroy_auth_data(sdata, false);
4936		ieee80211_report_disconnect(sdata, frame_buf,
4937					    sizeof(frame_buf), true,
4938					    req->reason_code);
4939
4940		return 0;
4941	}
4942
4943	if (ifmgd->assoc_data &&
4944	    ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4945		sdata_info(sdata,
4946			   "aborting association with %pM by local choice (Reason: %u=%s)\n",
4947			   req->bssid, req->reason_code,
4948			   ieee80211_get_reason_code_string(req->reason_code));
4949
4950		drv_mgd_prepare_tx(sdata->local, sdata);
4951		ieee80211_send_deauth_disassoc(sdata, req->bssid,
4952					       IEEE80211_STYPE_DEAUTH,
4953					       req->reason_code, tx,
4954					       frame_buf);
4955		ieee80211_destroy_assoc_data(sdata, false, true);
4956		ieee80211_report_disconnect(sdata, frame_buf,
4957					    sizeof(frame_buf), true,
4958					    req->reason_code);
4959		return 0;
4960	}
4961
4962	if (ifmgd->associated &&
4963	    ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4964		sdata_info(sdata,
4965			   "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4966			   req->bssid, req->reason_code,
4967			   ieee80211_get_reason_code_string(req->reason_code));
4968
4969		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4970				       req->reason_code, tx, frame_buf);
4971		ieee80211_report_disconnect(sdata, frame_buf,
4972					    sizeof(frame_buf), true,
4973					    req->reason_code);
4974		return 0;
4975	}
4976
4977	return -ENOTCONN;
4978}
4979
4980int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4981			   struct cfg80211_disassoc_request *req)
4982{
4983	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4984	u8 bssid[ETH_ALEN];
4985	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4986
4987	/*
4988	 * cfg80211 should catch this ... but it's racy since
4989	 * we can receive a disassoc frame, process it, hand it
4990	 * to cfg80211 while that's in a locked section already
4991	 * trying to tell us that the user wants to disconnect.
4992	 */
4993	if (ifmgd->associated != req->bss)
4994		return -ENOLINK;
4995
4996	sdata_info(sdata,
4997		   "disassociating from %pM by local choice (Reason: %u=%s)\n",
4998		   req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4999
5000	memcpy(bssid, req->bss->bssid, ETH_ALEN);
5001	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5002			       req->reason_code, !req->local_state_change,
5003			       frame_buf);
5004
5005	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5006				    req->reason_code);
5007
5008	return 0;
5009}
5010
5011void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5012{
5013	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5014
5015	/*
5016	 * Make sure some work items will not run after this,
5017	 * they will not do anything but might not have been
5018	 * cancelled when disconnecting.
5019	 */
5020	cancel_work_sync(&ifmgd->monitor_work);
5021	cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5022	cancel_work_sync(&ifmgd->request_smps_work);
5023	cancel_work_sync(&ifmgd->csa_connection_drop_work);
5024	cancel_work_sync(&ifmgd->chswitch_work);
5025	cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5026
5027	sdata_lock(sdata);
5028	if (ifmgd->assoc_data) {
5029		struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5030		ieee80211_destroy_assoc_data(sdata, false, false);
5031		cfg80211_assoc_timeout(sdata->dev, bss);
5032	}
5033	if (ifmgd->auth_data)
5034		ieee80211_destroy_auth_data(sdata, false);
5035	spin_lock_bh(&ifmgd->teardown_lock);
5036	if (ifmgd->teardown_skb) {
5037		kfree_skb(ifmgd->teardown_skb);
5038		ifmgd->teardown_skb = NULL;
5039		ifmgd->orig_teardown_skb = NULL;
5040	}
5041	spin_unlock_bh(&ifmgd->teardown_lock);
5042	del_timer_sync(&ifmgd->timer);
5043	sdata_unlock(sdata);
5044}
5045
5046void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5047			       enum nl80211_cqm_rssi_threshold_event rssi_event,
 
5048			       gfp_t gfp)
5049{
5050	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5051
5052	trace_api_cqm_rssi_notify(sdata, rssi_event);
5053
5054	cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5055}
5056EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5057
5058void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5059{
5060	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5061
5062	trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5063
5064	cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5065}
5066EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);