net/mac80211/mlme.c

   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  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/delay.h>
  15 #include <linux/if_ether.h>
  16 #include <linux/skbuff.h>
  17 #include <linux/if_arp.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/moduleparam.h>
  20 #include <linux/rtnetlink.h>
  21 #include <linux/pm_qos.h>
  22 #include <linux/crc32.h>
  23 #include <linux/slab.h>
  24 #include <linux/export.h>
  25 #include <net/mac80211.h>
  26 #include <asm/unaligned.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "led.h"
  32
  33 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  34 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  35 #define IEEE80211_AUTH_MAX_TRIES        3
  36 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  37 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  38 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  39 #define IEEE80211_ASSOC_MAX_TRIES       3
  40
  41 static int max_nullfunc_tries = 2;
  42 module_param(max_nullfunc_tries, int, 0644);
  43 MODULE_PARM_DESC(max_nullfunc_tries,
  44                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  45
  46 static int max_probe_tries = 5;
  47 module_param(max_probe_tries, int, 0644);
  48 MODULE_PARM_DESC(max_probe_tries,
  49                  "Maximum probe tries before disconnecting (reason 4).");
  50
  51 /*
  52  * Beacon loss timeout is calculated as N frames times the
  53  * advertised beacon interval.  This may need to be somewhat
  54  * higher than what hardware might detect to account for
  55  * delays in the host processing frames. But since we also
  56  * probe on beacon miss before declaring the connection lost
  57  * default to what we want.
  58  */
  59 static int beacon_loss_count = 7;
  60 module_param(beacon_loss_count, int, 0644);
  61 MODULE_PARM_DESC(beacon_loss_count,
  62                  "Number of beacon intervals before we decide beacon was lost.");
  63
  64 /*
  65  * Time the connection can be idle before we probe
  66  * it to see if we can still talk to the AP.
  67  */
  68 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  69 /*
  70  * Time we wait for a probe response after sending
  71  * a probe request because of beacon loss or for
  72  * checking the connection still works.
  73  */
  74 static int probe_wait_ms = 500;
  75 module_param(probe_wait_ms, int, 0644);
  76 MODULE_PARM_DESC(probe_wait_ms,
  77                  "Maximum time(ms) to wait for probe response"
  78                  " before disconnecting (reason 4).");
  79
  80 /*
  81  * Weight given to the latest Beacon frame when calculating average signal
  82  * strength for Beacon frames received in the current BSS. This must be
  83  * between 1 and 15.
  84  */
  85 #define IEEE80211_SIGNAL_AVE_WEIGHT     3
  86
  87 /*
  88  * How many Beacon frames need to have been used in average signal strength
  89  * before starting to indicate signal change events.
  90  */
  91 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  92
  93 /*
  94  * We can have multiple work items (and connection probing)
  95  * scheduling this timer, but we need to take care to only
  96  * reschedule it when it should fire _earlier_ than it was
  97  * asked for before, or if it's not pending right now. This
  98  * function ensures that. Note that it then is required to
  99  * run this function for all timeouts after the first one
 100  * has happened -- the work that runs from this timer will
 101  * do that.
 102  */
 103 static void run_again(struct ieee80211_sub_if_data *sdata,
 104                       unsigned long timeout)
 105 {
 106         sdata_assert_lock(sdata);
 107
 108         if (!timer_pending(&sdata->u.mgd.timer) ||
 109             time_before(timeout, sdata->u.mgd.timer.expires))
 110                 mod_timer(&sdata->u.mgd.timer, timeout);
 111 }
 112
 113 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 114 {
 115         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 116                 return;
 117
 118         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 119                 return;
 120
 121         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 122                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 123 }
 124
 125 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 126 {
 127         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 128
 129         if (unlikely(!sdata->u.mgd.associated))
 130                 return;
 131
 132         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 133                 return;
 134
 135         mod_timer(&sdata->u.mgd.conn_mon_timer,
 136                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 137
 138         ifmgd->probe_send_count = 0;
 139 }
 140
 141 static int ecw2cw(int ecw)
 142 {
 143         return (1 << ecw) - 1;
 144 }
 145
 146 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
 147 {
 148         u32 ret;
 149         int tmp;
 150
 151         switch (c->width) {
 152         case NL80211_CHAN_WIDTH_20:
 153                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
 154                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 155                 break;
 156         case NL80211_CHAN_WIDTH_40:
 157                 c->width = NL80211_CHAN_WIDTH_20;
 158                 c->center_freq1 = c->chan->center_freq;
 159                 ret = IEEE80211_STA_DISABLE_40MHZ |
 160                       IEEE80211_STA_DISABLE_VHT;
 161                 break;
 162         case NL80211_CHAN_WIDTH_80:
 163                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
 164                 /* n_P40 */
 165                 tmp /= 2;
 166                 /* freq_P40 */
 167                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
 168                 c->width = NL80211_CHAN_WIDTH_40;
 169                 ret = IEEE80211_STA_DISABLE_VHT;
 170                 break;
 171         case NL80211_CHAN_WIDTH_80P80:
 172                 c->center_freq2 = 0;
 173                 c->width = NL80211_CHAN_WIDTH_80;
 174                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
 175                       IEEE80211_STA_DISABLE_160MHZ;
 176                 break;
 177         case NL80211_CHAN_WIDTH_160:
 178                 /* n_P20 */
 179                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
 180                 /* n_P80 */
 181                 tmp /= 4;
 182                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
 183                 c->width = NL80211_CHAN_WIDTH_80;
 184                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
 185                       IEEE80211_STA_DISABLE_160MHZ;
 186                 break;
 187         default:
 188         case NL80211_CHAN_WIDTH_20_NOHT:
 189                 WARN_ON_ONCE(1);
 190                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
 191                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 192                 break;
 193         case NL80211_CHAN_WIDTH_5:
 194         case NL80211_CHAN_WIDTH_10:
 195                 WARN_ON_ONCE(1);
 196                 /* keep c->width */
 197                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 198                 break;
 199         }
 200
 201         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
 202
 203         return ret;
 204 }
 205
 206 static u32
 207 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 208                              struct ieee80211_supported_band *sband,
 209                              struct ieee80211_channel *channel,
 210                              const struct ieee80211_ht_operation *ht_oper,
 211                              const struct ieee80211_vht_operation *vht_oper,
 212                              struct cfg80211_chan_def *chandef, bool verbose)
 213 {
 214         struct cfg80211_chan_def vht_chandef;
 215         u32 ht_cfreq, ret;
 216
 217         chandef->chan = channel;
 218         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 219         chandef->center_freq1 = channel->center_freq;
 220         chandef->center_freq2 = 0;
 221
 222         if (!ht_oper || !sband->ht_cap.ht_supported) {
 223                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 224                 goto out;
 225         }
 226
 227         chandef->width = NL80211_CHAN_WIDTH_20;
 228
 229         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 230                                                   channel->band);
 231         /* check that channel matches the right operating channel */
 232         if (channel->center_freq != ht_cfreq) {
 233                 /*
 234                  * It's possible that some APs are confused here;
 235                  * Netgear WNDR3700 sometimes reports 4 higher than
 236                  * the actual channel in association responses, but
 237                  * since we look at probe response/beacon data here
 238                  * it should be OK.
 239                  */
 240                 if (verbose)
 241                         sdata_info(sdata,
 242                                    "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 243                                    channel->center_freq, ht_cfreq,
 244                                    ht_oper->primary_chan, channel->band);
 245                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 246                 goto out;
 247         }
 248
 249         /* check 40 MHz support, if we have it */
 250         if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 251                 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 252                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 253                         chandef->width = NL80211_CHAN_WIDTH_40;
 254                         chandef->center_freq1 += 10;
 255                         break;
 256                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 257                         chandef->width = NL80211_CHAN_WIDTH_40;
 258                         chandef->center_freq1 -= 10;
 259                         break;
 260                 }
 261         } else {
 262                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 263                 ret = IEEE80211_STA_DISABLE_VHT;
 264                 /* also mark 40 MHz disabled */
 265                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 266                 goto out;
 267         }
 268
 269         if (!vht_oper || !sband->vht_cap.vht_supported) {
 270                 ret = IEEE80211_STA_DISABLE_VHT;
 271                 goto out;
 272         }
 273
 274         vht_chandef.chan = channel;
 275         vht_chandef.center_freq1 =
 276                 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
 277                                                channel->band);
 278         vht_chandef.center_freq2 = 0;
 279
 280         switch (vht_oper->chan_width) {
 281         case IEEE80211_VHT_CHANWIDTH_USE_HT:
 282                 vht_chandef.width = chandef->width;
 283                 break;
 284         case IEEE80211_VHT_CHANWIDTH_80MHZ:
 285                 vht_chandef.width = NL80211_CHAN_WIDTH_80;
 286                 break;
 287         case IEEE80211_VHT_CHANWIDTH_160MHZ:
 288                 vht_chandef.width = NL80211_CHAN_WIDTH_160;
 289                 break;
 290         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
 291                 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
 292                 vht_chandef.center_freq2 =
 293                         ieee80211_channel_to_frequency(
 294                                 vht_oper->center_freq_seg2_idx,
 295                                 channel->band);
 296                 break;
 297         default:
 298                 if (verbose)
 299                         sdata_info(sdata,
 300                                    "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
 301                                    vht_oper->chan_width);
 302                 ret = IEEE80211_STA_DISABLE_VHT;
 303                 goto out;
 304         }
 305
 306         if (!cfg80211_chandef_valid(&vht_chandef)) {
 307                 if (verbose)
 308                         sdata_info(sdata,
 309                                    "AP VHT information is invalid, disable VHT\n");
 310                 ret = IEEE80211_STA_DISABLE_VHT;
 311                 goto out;
 312         }
 313
 314         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 315                 ret = 0;
 316                 goto out;
 317         }
 318
 319         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 320                 if (verbose)
 321                         sdata_info(sdata,
 322                                    "AP VHT information doesn't match HT, disable VHT\n");
 323                 ret = IEEE80211_STA_DISABLE_VHT;
 324                 goto out;
 325         }
 326
 327         *chandef = vht_chandef;
 328
 329         ret = 0;
 330
 331 out:
 332         /* don't print the message below for VHT mismatch if VHT is disabled */
 333         if (ret & IEEE80211_STA_DISABLE_VHT)
 334                 vht_chandef = *chandef;
 335
 336         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 337                                         IEEE80211_CHAN_DISABLED)) {
 338                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 339                         ret = IEEE80211_STA_DISABLE_HT |
 340                               IEEE80211_STA_DISABLE_VHT;
 341                         goto out;
 342                 }
 343
 344                 ret |= chandef_downgrade(chandef);
 345         }
 346
 347         if (chandef->width != vht_chandef.width && verbose)
 348                 sdata_info(sdata,
 349                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 350
 351         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 352         return ret;
 353 }
 354
 355 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 356                                struct sta_info *sta,
 357                                const struct ieee80211_ht_operation *ht_oper,
 358                                const struct ieee80211_vht_operation *vht_oper,
 359                                const u8 *bssid, u32 *changed)
 360 {
 361         struct ieee80211_local *local = sdata->local;
 362         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 363         struct ieee80211_supported_band *sband;
 364         struct ieee80211_channel *chan;
 365         struct cfg80211_chan_def chandef;
 366         u16 ht_opmode;
 367         u32 flags;
 368         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 369         int ret;
 370
 371         /* if HT was/is disabled, don't track any bandwidth changes */
 372         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 373                 return 0;
 374
 375         /* don't check VHT if we associated as non-VHT station */
 376         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 377                 vht_oper = NULL;
 378
 379         if (WARN_ON_ONCE(!sta))
 380                 return -EINVAL;
 381
 382         chan = sdata->vif.bss_conf.chandef.chan;
 383         sband = local->hw.wiphy->bands[chan->band];
 384
 385         /* calculate new channel (type) based on HT/VHT operation IEs */
 386         flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
 387                                              vht_oper, &chandef, false);
 388
 389         /*
 390          * Downgrade the new channel if we associated with restricted
 391          * capabilities. For example, if we associated as a 20 MHz STA
 392          * to a 40 MHz AP (due to regulatory, capabilities or config
 393          * reasons) then switching to a 40 MHz channel now won't do us
 394          * any good -- we couldn't use it with the AP.
 395          */
 396         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 397             chandef.width == NL80211_CHAN_WIDTH_80P80)
 398                 flags |= chandef_downgrade(&chandef);
 399         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 400             chandef.width == NL80211_CHAN_WIDTH_160)
 401                 flags |= chandef_downgrade(&chandef);
 402         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 403             chandef.width > NL80211_CHAN_WIDTH_20)
 404                 flags |= chandef_downgrade(&chandef);
 405
 406         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 407                 return 0;
 408
 409         sdata_info(sdata,
 410                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 411                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 412                    chandef.center_freq1, chandef.center_freq2);
 413
 414         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 415                                       IEEE80211_STA_DISABLE_VHT |
 416                                       IEEE80211_STA_DISABLE_40MHZ |
 417                                       IEEE80211_STA_DISABLE_80P80MHZ |
 418                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 419             !cfg80211_chandef_valid(&chandef)) {
 420                 sdata_info(sdata,
 421                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 422                            ifmgd->bssid);
 423                 return -EINVAL;
 424         }
 425
 426         switch (chandef.width) {
 427         case NL80211_CHAN_WIDTH_20_NOHT:
 428         case NL80211_CHAN_WIDTH_20:
 429                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 430                 break;
 431         case NL80211_CHAN_WIDTH_40:
 432                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 433                 break;
 434         case NL80211_CHAN_WIDTH_80:
 435                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 436                 break;
 437         case NL80211_CHAN_WIDTH_80P80:
 438         case NL80211_CHAN_WIDTH_160:
 439                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 440                 break;
 441         default:
 442                 return -EINVAL;
 443         }
 444
 445         if (new_sta_bw > sta->cur_max_bandwidth)
 446                 new_sta_bw = sta->cur_max_bandwidth;
 447
 448         if (new_sta_bw < sta->sta.bandwidth) {
 449                 sta->sta.bandwidth = new_sta_bw;
 450                 rate_control_rate_update(local, sband, sta,
 451                                          IEEE80211_RC_BW_CHANGED);
 452         }
 453
 454         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 455         if (ret) {
 456                 sdata_info(sdata,
 457                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 458                            ifmgd->bssid);
 459                 return ret;
 460         }
 461
 462         if (new_sta_bw > sta->sta.bandwidth) {
 463                 sta->sta.bandwidth = new_sta_bw;
 464                 rate_control_rate_update(local, sband, sta,
 465                                          IEEE80211_RC_BW_CHANGED);
 466         }
 467
 468         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 469
 470         /* if bss configuration changed store the new one */
 471         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 472                 *changed |= BSS_CHANGED_HT;
 473                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 474         }
 475
 476         return 0;
 477 }
 478
 479 /* frame sending functions */
 480
 481 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
 482                                       struct ieee80211_supported_band *sband,
 483                                       u32 *rates)
 484 {
 485         int i, j, count;
 486         *rates = 0;
 487         count = 0;
 488         for (i = 0; i < supp_rates_len; i++) {
 489                 int rate = (supp_rates[i] & 0x7F) * 5;
 490
 491                 for (j = 0; j < sband->n_bitrates; j++)
 492                         if (sband->bitrates[j].bitrate == rate) {
 493                                 *rates |= BIT(j);
 494                                 count++;
 495                                 break;
 496                         }
 497         }
 498
 499         return count;
 500 }
 501
 502 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 503                                 struct sk_buff *skb, u8 ap_ht_param,
 504                                 struct ieee80211_supported_band *sband,
 505                                 struct ieee80211_channel *channel,
 506                                 enum ieee80211_smps_mode smps)
 507 {
 508         u8 *pos;
 509         u32 flags = channel->flags;
 510         u16 cap;
 511         struct ieee80211_sta_ht_cap ht_cap;
 512
 513         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 514
 515         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 516         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 517
 518         /* determine capability flags */
 519         cap = ht_cap.cap;
 520
 521         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 522         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 523                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 524                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 525                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 526                 }
 527                 break;
 528         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 529                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 530                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 531                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 532                 }
 533                 break;
 534         }
 535
 536         /*
 537          * If 40 MHz was disabled associate as though we weren't
 538          * capable of 40 MHz -- some broken APs will never fall
 539          * back to trying to transmit in 20 MHz.
 540          */
 541         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 542                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 543                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 544         }
 545
 546         /* set SM PS mode properly */
 547         cap &= ~IEEE80211_HT_CAP_SM_PS;
 548         switch (smps) {
 549         case IEEE80211_SMPS_AUTOMATIC:
 550         case IEEE80211_SMPS_NUM_MODES:
 551                 WARN_ON(1);
 552         case IEEE80211_SMPS_OFF:
 553                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 554                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 555                 break;
 556         case IEEE80211_SMPS_STATIC:
 557                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 558                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 559                 break;
 560         case IEEE80211_SMPS_DYNAMIC:
 561                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 562                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 563                 break;
 564         }
 565
 566         /* reserve and fill IE */
 567         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 568         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 569 }
 570
 571 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 572                                  struct sk_buff *skb,
 573                                  struct ieee80211_supported_band *sband,
 574                                  struct ieee80211_vht_cap *ap_vht_cap)
 575 {
 576         u8 *pos;
 577         u32 cap;
 578         struct ieee80211_sta_vht_cap vht_cap;
 579
 580         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 581
 582         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 583         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 584
 585         /* determine capability flags */
 586         cap = vht_cap.cap;
 587
 588         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 589                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
 590                 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 591         }
 592
 593         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 594                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 595                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 596         }
 597
 598         /*
 599          * Some APs apparently get confused if our capabilities are better
 600          * than theirs, so restrict what we advertise in the assoc request.
 601          */
 602         if (!(ap_vht_cap->vht_cap_info &
 603                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 604                 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
 605
 606         /* reserve and fill IE */
 607         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 608         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 609 }
 610
 611 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 612 {
 613         struct ieee80211_local *local = sdata->local;
 614         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 615         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 616         struct sk_buff *skb;
 617         struct ieee80211_mgmt *mgmt;
 618         u8 *pos, qos_info;
 619         size_t offset = 0, noffset;
 620         int i, count, rates_len, supp_rates_len;
 621         u16 capab;
 622         struct ieee80211_supported_band *sband;
 623         struct ieee80211_chanctx_conf *chanctx_conf;
 624         struct ieee80211_channel *chan;
 625         u32 rates = 0;
 626
 627         sdata_assert_lock(sdata);
 628
 629         rcu_read_lock();
 630         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 631         if (WARN_ON(!chanctx_conf)) {
 632                 rcu_read_unlock();
 633                 return;
 634         }
 635         chan = chanctx_conf->def.chan;
 636         rcu_read_unlock();
 637         sband = local->hw.wiphy->bands[chan->band];
 638
 639         if (assoc_data->supp_rates_len) {
 640                 /*
 641                  * Get all rates supported by the device and the AP as
 642                  * some APs don't like getting a superset of their rates
 643                  * in the association request (e.g. D-Link DAP 1353 in
 644                  * b-only mode)...
 645                  */
 646                 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
 647                                                        assoc_data->supp_rates_len,
 648                                                        sband, &rates);
 649         } else {
 650                 /*
 651                  * In case AP not provide any supported rates information
 652                  * before association, we send information element(s) with
 653                  * all rates that we support.
 654                  */
 655                 rates = ~0;
 656                 rates_len = sband->n_bitrates;
 657         }
 658
 659         skb = alloc_skb(local->hw.extra_tx_headroom +
 660                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 661                         2 + assoc_data->ssid_len + /* SSID */
 662                         4 + rates_len + /* (extended) rates */
 663                         4 + /* power capability */
 664                         2 + 2 * sband->n_channels + /* supported channels */
 665                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 666                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 667                         assoc_data->ie_len + /* extra IEs */
 668                         9, /* WMM */
 669                         GFP_KERNEL);
 670         if (!skb)
 671                 return;
 672
 673         skb_reserve(skb, local->hw.extra_tx_headroom);
 674
 675         capab = WLAN_CAPABILITY_ESS;
 676
 677         if (sband->band == IEEE80211_BAND_2GHZ) {
 678                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 679                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 680                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 681                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 682         }
 683
 684         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 685                 capab |= WLAN_CAPABILITY_PRIVACY;
 686
 687         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 688             (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 689                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 690
 691         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 692         memset(mgmt, 0, 24);
 693         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 694         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 695         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 696
 697         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 698                 skb_put(skb, 10);
 699                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 700                                                   IEEE80211_STYPE_REASSOC_REQ);
 701                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 702                 mgmt->u.reassoc_req.listen_interval =
 703                                 cpu_to_le16(local->hw.conf.listen_interval);
 704                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 705                        ETH_ALEN);
 706         } else {
 707                 skb_put(skb, 4);
 708                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 709                                                   IEEE80211_STYPE_ASSOC_REQ);
 710                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 711                 mgmt->u.assoc_req.listen_interval =
 712                                 cpu_to_le16(local->hw.conf.listen_interval);
 713         }
 714
 715         /* SSID */
 716         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 717         *pos++ = WLAN_EID_SSID;
 718         *pos++ = assoc_data->ssid_len;
 719         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 720
 721         /* add all rates which were marked to be used above */
 722         supp_rates_len = rates_len;
 723         if (supp_rates_len > 8)
 724                 supp_rates_len = 8;
 725
 726         pos = skb_put(skb, supp_rates_len + 2);
 727         *pos++ = WLAN_EID_SUPP_RATES;
 728         *pos++ = supp_rates_len;
 729
 730         count = 0;
 731         for (i = 0; i < sband->n_bitrates; i++) {
 732                 if (BIT(i) & rates) {
 733                         int rate = sband->bitrates[i].bitrate;
 734                         *pos++ = (u8) (rate / 5);
 735                         if (++count == 8)
 736                                 break;
 737                 }
 738         }
 739
 740         if (rates_len > count) {
 741                 pos = skb_put(skb, rates_len - count + 2);
 742                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 743                 *pos++ = rates_len - count;
 744
 745                 for (i++; i < sband->n_bitrates; i++) {
 746                         if (BIT(i) & rates) {
 747                                 int rate = sband->bitrates[i].bitrate;
 748                                 *pos++ = (u8) (rate / 5);
 749                         }
 750                 }
 751         }
 752
 753         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 754                 /* 1. power capabilities */
 755                 pos = skb_put(skb, 4);
 756                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 757                 *pos++ = 2;
 758                 *pos++ = 0; /* min tx power */
 759                 *pos++ = chan->max_power; /* max tx power */
 760
 761                 /* 2. supported channels */
 762                 /* TODO: get this in reg domain format */
 763                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 764                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 765                 *pos++ = 2 * sband->n_channels;
 766                 for (i = 0; i < sband->n_channels; i++) {
 767                         *pos++ = ieee80211_frequency_to_channel(
 768                                         sband->channels[i].center_freq);
 769                         *pos++ = 1; /* one channel in the subband*/
 770                 }
 771         }
 772
 773         /* if present, add any custom IEs that go before HT */
 774         if (assoc_data->ie_len && assoc_data->ie) {
 775                 static const u8 before_ht[] = {
 776                         WLAN_EID_SSID,
 777                         WLAN_EID_SUPP_RATES,
 778                         WLAN_EID_EXT_SUPP_RATES,
 779                         WLAN_EID_PWR_CAPABILITY,
 780                         WLAN_EID_SUPPORTED_CHANNELS,
 781                         WLAN_EID_RSN,
 782                         WLAN_EID_QOS_CAPA,
 783                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 784                         WLAN_EID_MOBILITY_DOMAIN,
 785                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 786                 };
 787                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 788                                              before_ht, ARRAY_SIZE(before_ht),
 789                                              offset);
 790                 pos = skb_put(skb, noffset - offset);
 791                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 792                 offset = noffset;
 793         }
 794
 795         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 796                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 797                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 798
 799         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 800                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 801                                     sband, chan, sdata->smps_mode);
 802
 803         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 804                 ieee80211_add_vht_ie(sdata, skb, sband,
 805                                      &assoc_data->ap_vht_cap);
 806
 807         /* if present, add any custom non-vendor IEs that go after HT */
 808         if (assoc_data->ie_len && assoc_data->ie) {
 809                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 810                                                     assoc_data->ie_len,
 811                                                     offset);
 812                 pos = skb_put(skb, noffset - offset);
 813                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 814                 offset = noffset;
 815         }
 816
 817         if (assoc_data->wmm) {
 818                 if (assoc_data->uapsd) {
 819                         qos_info = ifmgd->uapsd_queues;
 820                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 821                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 822                 } else {
 823                         qos_info = 0;
 824                 }
 825
 826                 pos = skb_put(skb, 9);
 827                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 828                 *pos++ = 7; /* len */
 829                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 830                 *pos++ = 0x50;
 831                 *pos++ = 0xf2;
 832                 *pos++ = 2; /* WME */
 833                 *pos++ = 0; /* WME info */
 834                 *pos++ = 1; /* WME ver */
 835                 *pos++ = qos_info;
 836         }
 837
 838         /* add any remaining custom (i.e. vendor specific here) IEs */
 839         if (assoc_data->ie_len && assoc_data->ie) {
 840                 noffset = assoc_data->ie_len;
 841                 pos = skb_put(skb, noffset - offset);
 842                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 843         }
 844
 845         drv_mgd_prepare_tx(local, sdata);
 846
 847         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 848         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 849                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 850                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 851         ieee80211_tx_skb(sdata, skb);
 852 }
 853
 854 void ieee80211_send_pspoll(struct ieee80211_local *local,
 855                            struct ieee80211_sub_if_data *sdata)
 856 {
 857         struct ieee80211_pspoll *pspoll;
 858         struct sk_buff *skb;
 859
 860         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 861         if (!skb)
 862                 return;
 863
 864         pspoll = (struct ieee80211_pspoll *) skb->data;
 865         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 866
 867         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 868         ieee80211_tx_skb(sdata, skb);
 869 }
 870
 871 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 872                              struct ieee80211_sub_if_data *sdata,
 873                              int powersave)
 874 {
 875         struct sk_buff *skb;
 876         struct ieee80211_hdr_3addr *nullfunc;
 877         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 878
 879         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 880         if (!skb)
 881                 return;
 882
 883         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 884         if (powersave)
 885                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 886
 887         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 888                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 889
 890         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 891                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 892
 893         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
 894                             IEEE80211_STA_CONNECTION_POLL))
 895                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 896
 897         ieee80211_tx_skb(sdata, skb);
 898 }
 899
 900 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 901                                           struct ieee80211_sub_if_data *sdata)
 902 {
 903         struct sk_buff *skb;
 904         struct ieee80211_hdr *nullfunc;
 905         __le16 fc;
 906
 907         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 908                 return;
 909
 910         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 911         if (!skb)
 912                 return;
 913
 914         skb_reserve(skb, local->hw.extra_tx_headroom);
 915
 916         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 917         memset(nullfunc, 0, 30);
 918         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 919                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 920         nullfunc->frame_control = fc;
 921         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 922         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 923         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 924         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 925
 926         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 927         ieee80211_tx_skb(sdata, skb);
 928 }
 929
 930 /* spectrum management related things */
 931 static void ieee80211_chswitch_work(struct work_struct *work)
 932 {
 933         struct ieee80211_sub_if_data *sdata =
 934                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 935         struct ieee80211_local *local = sdata->local;
 936         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 937
 938         if (!ieee80211_sdata_running(sdata))
 939                 return;
 940
 941         sdata_lock(sdata);
 942         if (!ifmgd->associated)
 943                 goto out;
 944
 945         local->_oper_chandef = local->csa_chandef;
 946
 947         if (!local->ops->channel_switch) {
 948                 /* call "hw_config" only if doing sw channel switch */
 949                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
 950         } else {
 951                 /* update the device channel directly */
 952                 local->hw.conf.chandef = local->_oper_chandef;
 953         }
 954
 955         /* XXX: shouldn't really modify cfg80211-owned data! */
 956         ifmgd->associated->channel = local->_oper_chandef.chan;
 957
 958         /* XXX: wait for a beacon first? */
 959         ieee80211_wake_queues_by_reason(&local->hw,
 960                                         IEEE80211_MAX_QUEUE_MAP,
 961                                         IEEE80211_QUEUE_STOP_REASON_CSA);
 962  out:
 963         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
 964         sdata_unlock(sdata);
 965 }
 966
 967 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
 968 {
 969         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 970         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 971
 972         trace_api_chswitch_done(sdata, success);
 973         if (!success) {
 974                 sdata_info(sdata,
 975                            "driver channel switch failed, disconnecting\n");
 976                 ieee80211_queue_work(&sdata->local->hw,
 977                                      &ifmgd->csa_connection_drop_work);
 978         } else {
 979                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
 980         }
 981 }
 982 EXPORT_SYMBOL(ieee80211_chswitch_done);
 983
 984 static void ieee80211_chswitch_timer(unsigned long data)
 985 {
 986         struct ieee80211_sub_if_data *sdata =
 987                 (struct ieee80211_sub_if_data *) data;
 988
 989         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
 990 }
 991
 992 static void
 993 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 994                                  u64 timestamp, struct ieee802_11_elems *elems,
 995                                  bool beacon)
 996 {
 997         struct ieee80211_local *local = sdata->local;
 998         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 999         struct cfg80211_bss *cbss = ifmgd->associated;
1000         struct ieee80211_bss *bss;
1001         struct ieee80211_chanctx *chanctx;
1002         enum ieee80211_band new_band;
1003         int new_freq;
1004         u8 new_chan_no;
1005         u8 count;
1006         u8 mode;
1007         struct ieee80211_channel *new_chan;
1008         struct cfg80211_chan_def new_chandef = {};
1009         struct cfg80211_chan_def new_vht_chandef = {};
1010         const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1011         const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1012         const struct ieee80211_ht_operation *ht_oper;
1013         int secondary_channel_offset = -1;
1014
1015         sdata_assert_lock(sdata);
1016
1017         if (!cbss)
1018                 return;
1019
1020         if (local->scanning)
1021                 return;
1022
1023         /* disregard subsequent announcements if we are already processing */
1024         if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1025                 return;
1026
1027         sec_chan_offs = elems->sec_chan_offs;
1028         wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
1029         ht_oper = elems->ht_operation;
1030
1031         if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1032                             IEEE80211_STA_DISABLE_40MHZ)) {
1033                 sec_chan_offs = NULL;
1034                 wide_bw_chansw_ie = NULL;
1035                 /* only used for bandwidth here */
1036                 ht_oper = NULL;
1037         }
1038
1039         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1040                 wide_bw_chansw_ie = NULL;
1041
1042         if (elems->ext_chansw_ie) {
1043                 if (!ieee80211_operating_class_to_band(
1044                                 elems->ext_chansw_ie->new_operating_class,
1045                                 &new_band)) {
1046                         sdata_info(sdata,
1047                                    "cannot understand ECSA IE operating class %d, disconnecting\n",
1048                                    elems->ext_chansw_ie->new_operating_class);
1049                         ieee80211_queue_work(&local->hw,
1050                                              &ifmgd->csa_connection_drop_work);
1051                 }
1052                 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1053                 count = elems->ext_chansw_ie->count;
1054                 mode = elems->ext_chansw_ie->mode;
1055         } else if (elems->ch_switch_ie) {
1056                 new_band = cbss->channel->band;
1057                 new_chan_no = elems->ch_switch_ie->new_ch_num;
1058                 count = elems->ch_switch_ie->count;
1059                 mode = elems->ch_switch_ie->mode;
1060         } else {
1061                 /* nothing here we understand */
1062                 return;
1063         }
1064
1065         bss = (void *)cbss->priv;
1066
1067         new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
1068         new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1069         if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
1070                 sdata_info(sdata,
1071                            "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1072                            ifmgd->associated->bssid, new_freq);
1073                 ieee80211_queue_work(&local->hw,
1074                                      &ifmgd->csa_connection_drop_work);
1075                 return;
1076         }
1077
1078         if (!beacon && sec_chan_offs) {
1079                 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
1080         } else if (beacon && ht_oper) {
1081                 secondary_channel_offset =
1082                         ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
1083         } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
1084                 /*
1085                  * If it's not a beacon, HT is enabled and the IE not present,
1086                  * it's 20 MHz, 802.11-2012 8.5.2.6:
1087                  *      This element [the Secondary Channel Offset Element] is
1088                  *      present when switching to a 40 MHz channel. It may be
1089                  *      present when switching to a 20 MHz channel (in which
1090                  *      case the secondary channel offset is set to SCN).
1091                  */
1092                 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1093         }
1094
1095         switch (secondary_channel_offset) {
1096         default:
1097                 /* secondary_channel_offset was present but is invalid */
1098         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1099                 cfg80211_chandef_create(&new_chandef, new_chan,
1100                                         NL80211_CHAN_HT20);
1101                 break;
1102         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1103                 cfg80211_chandef_create(&new_chandef, new_chan,
1104                                         NL80211_CHAN_HT40PLUS);
1105                 break;
1106         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1107                 cfg80211_chandef_create(&new_chandef, new_chan,
1108                                         NL80211_CHAN_HT40MINUS);
1109                 break;
1110         case -1:
1111                 cfg80211_chandef_create(&new_chandef, new_chan,
1112                                         NL80211_CHAN_NO_HT);
1113                 break;
1114         }
1115
1116         if (wide_bw_chansw_ie) {
1117                 new_vht_chandef.chan = new_chan;
1118                 new_vht_chandef.center_freq1 =
1119                         ieee80211_channel_to_frequency(
1120                                 wide_bw_chansw_ie->new_center_freq_seg0,
1121                                 new_band);
1122
1123                 switch (wide_bw_chansw_ie->new_channel_width) {
1124                 default:
1125                         /* hmmm, ignore VHT and use HT if present */
1126                 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1127                         new_vht_chandef.chan = NULL;
1128                         break;
1129                 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1130                         new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1131                         break;
1132                 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1133                         new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1134                         break;
1135                 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1136                         /* field is otherwise reserved */
1137                         new_vht_chandef.center_freq2 =
1138                                 ieee80211_channel_to_frequency(
1139                                         wide_bw_chansw_ie->new_center_freq_seg1,
1140                                         new_band);
1141                         new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1142                         break;
1143                 }
1144                 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1145                     new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1146                         chandef_downgrade(&new_vht_chandef);
1147                 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1148                     new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1149                         chandef_downgrade(&new_vht_chandef);
1150                 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1151                     new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1152                         chandef_downgrade(&new_vht_chandef);
1153         }
1154
1155         /* if VHT data is there validate & use it */
1156         if (new_vht_chandef.chan) {
1157                 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1158                                                  &new_chandef)) {
1159                         sdata_info(sdata,
1160                                    "AP %pM CSA has inconsistent channel data, disconnecting\n",
1161                                    ifmgd->associated->bssid);
1162                         ieee80211_queue_work(&local->hw,
1163                                              &ifmgd->csa_connection_drop_work);
1164                         return;
1165                 }
1166                 new_chandef = new_vht_chandef;
1167         }
1168
1169         if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1170                                      IEEE80211_CHAN_DISABLED)) {
1171                 sdata_info(sdata,
1172                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1173                            ifmgd->associated->bssid, new_freq,
1174                            new_chandef.width, new_chandef.center_freq1,
1175                            new_chandef.center_freq2);
1176                 ieee80211_queue_work(&local->hw,
1177                                      &ifmgd->csa_connection_drop_work);
1178                 return;
1179         }
1180
1181         ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1182
1183         if (local->use_chanctx) {
1184                 sdata_info(sdata,
1185                            "not handling channel switch with channel contexts\n");
1186                 ieee80211_queue_work(&local->hw,
1187                                      &ifmgd->csa_connection_drop_work);
1188                 return;
1189         }
1190
1191         mutex_lock(&local->chanctx_mtx);
1192         if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1193                 mutex_unlock(&local->chanctx_mtx);
1194                 return;
1195         }
1196         chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1197                                struct ieee80211_chanctx, conf);
1198         if (chanctx->refcount > 1) {
1199                 sdata_info(sdata,
1200                            "channel switch with multiple interfaces on the same channel, disconnecting\n");
1201                 ieee80211_queue_work(&local->hw,
1202                                      &ifmgd->csa_connection_drop_work);
1203                 mutex_unlock(&local->chanctx_mtx);
1204                 return;
1205         }
1206         mutex_unlock(&local->chanctx_mtx);
1207
1208         local->csa_chandef = new_chandef;
1209
1210         if (mode)
1211                 ieee80211_stop_queues_by_reason(&local->hw,
1212                                 IEEE80211_MAX_QUEUE_MAP,
1213                                 IEEE80211_QUEUE_STOP_REASON_CSA);
1214
1215         if (local->ops->channel_switch) {
1216                 /* use driver's channel switch callback */
1217                 struct ieee80211_channel_switch ch_switch = {
1218                         .timestamp = timestamp,
1219                         .block_tx = mode,
1220                         .chandef = new_chandef,
1221                         .count = count,
1222                 };
1223
1224                 drv_channel_switch(local, &ch_switch);
1225                 return;
1226         }
1227
1228         /* channel switch handled in software */
1229         if (count <= 1)
1230                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1231         else
1232                 mod_timer(&ifmgd->chswitch_timer,
1233                           TU_TO_EXP_TIME(count * cbss->beacon_interval));
1234 }
1235
1236 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1237                                        struct ieee80211_channel *channel,
1238                                        const u8 *country_ie, u8 country_ie_len,
1239                                        const u8 *pwr_constr_elem)
1240 {
1241         struct ieee80211_country_ie_triplet *triplet;
1242         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1243         int i, chan_pwr, chan_increment, new_ap_level;
1244         bool have_chan_pwr = false;
1245
1246         /* Invalid IE */
1247         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1248                 return 0;
1249
1250         triplet = (void *)(country_ie + 3);
1251         country_ie_len -= 3;
1252
1253         switch (channel->band) {
1254         default:
1255                 WARN_ON_ONCE(1);
1256                 /* fall through */
1257         case IEEE80211_BAND_2GHZ:
1258         case IEEE80211_BAND_60GHZ:
1259                 chan_increment = 1;
1260                 break;
1261         case IEEE80211_BAND_5GHZ:
1262                 chan_increment = 4;
1263                 break;
1264         }
1265
1266         /* find channel */
1267         while (country_ie_len >= 3) {
1268                 u8 first_channel = triplet->chans.first_channel;
1269
1270                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1271                         goto next;
1272
1273                 for (i = 0; i < triplet->chans.num_channels; i++) {
1274                         if (first_channel + i * chan_increment == chan) {
1275                                 have_chan_pwr = true;
1276                                 chan_pwr = triplet->chans.max_power;
1277                                 break;
1278                         }
1279                 }
1280                 if (have_chan_pwr)
1281                         break;
1282
1283  next:
1284                 triplet++;
1285                 country_ie_len -= 3;
1286         }
1287
1288         if (!have_chan_pwr)
1289                 return 0;
1290
1291         new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1292
1293         if (sdata->ap_power_level == new_ap_level)
1294                 return 0;
1295
1296         sdata_info(sdata,
1297                    "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1298                    new_ap_level, chan_pwr, *pwr_constr_elem,
1299                    sdata->u.mgd.bssid);
1300         sdata->ap_power_level = new_ap_level;
1301         if (__ieee80211_recalc_txpower(sdata))
1302                 return BSS_CHANGED_TXPOWER;
1303         return 0;
1304 }
1305
1306 /* powersave */
1307 static void ieee80211_enable_ps(struct ieee80211_local *local,
1308                                 struct ieee80211_sub_if_data *sdata)
1309 {
1310         struct ieee80211_conf *conf = &local->hw.conf;
1311
1312         /*
1313          * If we are scanning right now then the parameters will
1314          * take effect when scan finishes.
1315          */
1316         if (local->scanning)
1317                 return;
1318
1319         if (conf->dynamic_ps_timeout > 0 &&
1320             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1321                 mod_timer(&local->dynamic_ps_timer, jiffies +
1322                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1323         } else {
1324                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1325                         ieee80211_send_nullfunc(local, sdata, 1);
1326
1327                 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1328                     (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1329                         return;
1330
1331                 conf->flags |= IEEE80211_CONF_PS;
1332                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1333         }
1334 }
1335
1336 static void ieee80211_change_ps(struct ieee80211_local *local)
1337 {
1338         struct ieee80211_conf *conf = &local->hw.conf;
1339
1340         if (local->ps_sdata) {
1341                 ieee80211_enable_ps(local, local->ps_sdata);
1342         } else if (conf->flags & IEEE80211_CONF_PS) {
1343                 conf->flags &= ~IEEE80211_CONF_PS;
1344                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1345                 del_timer_sync(&local->dynamic_ps_timer);
1346                 cancel_work_sync(&local->dynamic_ps_enable_work);
1347         }
1348 }
1349
1350 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1351 {
1352         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1353         struct sta_info *sta = NULL;
1354         bool authorized = false;
1355
1356         if (!mgd->powersave)
1357                 return false;
1358
1359         if (mgd->broken_ap)
1360                 return false;
1361
1362         if (!mgd->associated)
1363                 return false;
1364
1365         if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1366                           IEEE80211_STA_CONNECTION_POLL))
1367                 return false;
1368
1369         if (!mgd->have_beacon)
1370                 return false;
1371
1372         rcu_read_lock();
1373         sta = sta_info_get(sdata, mgd->bssid);
1374         if (sta)
1375                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1376         rcu_read_unlock();
1377
1378         return authorized;
1379 }
1380
1381 /* need to hold RTNL or interface lock */
1382 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1383 {
1384         struct ieee80211_sub_if_data *sdata, *found = NULL;
1385         int count = 0;
1386         int timeout;
1387
1388         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1389                 local->ps_sdata = NULL;
1390                 return;
1391         }
1392
1393         list_for_each_entry(sdata, &local->interfaces, list) {
1394                 if (!ieee80211_sdata_running(sdata))
1395                         continue;
1396                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1397                         /* If an AP vif is found, then disable PS
1398                          * by setting the count to zero thereby setting
1399                          * ps_sdata to NULL.
1400                          */
1401                         count = 0;
1402                         break;
1403                 }
1404                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1405                         continue;
1406                 found = sdata;
1407                 count++;
1408         }
1409
1410         if (count == 1 && ieee80211_powersave_allowed(found)) {
1411                 s32 beaconint_us;
1412
1413                 if (latency < 0)
1414                         latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1415
1416                 beaconint_us = ieee80211_tu_to_usec(
1417                                         found->vif.bss_conf.beacon_int);
1418
1419                 timeout = local->dynamic_ps_forced_timeout;
1420                 if (timeout < 0) {
1421                         /*
1422                          * Go to full PSM if the user configures a very low
1423                          * latency requirement.
1424                          * The 2000 second value is there for compatibility
1425                          * until the PM_QOS_NETWORK_LATENCY is configured
1426                          * with real values.
1427                          */
1428                         if (latency > (1900 * USEC_PER_MSEC) &&
1429                             latency != (2000 * USEC_PER_SEC))
1430                                 timeout = 0;
1431                         else
1432                                 timeout = 100;
1433                 }
1434                 local->hw.conf.dynamic_ps_timeout = timeout;
1435
1436                 if (beaconint_us > latency) {
1437                         local->ps_sdata = NULL;
1438                 } else {
1439                         int maxslp = 1;
1440                         u8 dtimper = found->u.mgd.dtim_period;
1441
1442                         /* If the TIM IE is invalid, pretend the value is 1 */
1443                         if (!dtimper)
1444                                 dtimper = 1;
1445                         else if (dtimper > 1)
1446                                 maxslp = min_t(int, dtimper,
1447                                                     latency / beaconint_us);
1448
1449                         local->hw.conf.max_sleep_period = maxslp;
1450                         local->hw.conf.ps_dtim_period = dtimper;
1451                         local->ps_sdata = found;
1452                 }
1453         } else {
1454                 local->ps_sdata = NULL;
1455         }
1456
1457         ieee80211_change_ps(local);
1458 }
1459
1460 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1461 {
1462         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1463
1464         if (sdata->vif.bss_conf.ps != ps_allowed) {
1465                 sdata->vif.bss_conf.ps = ps_allowed;
1466                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1467         }
1468 }
1469
1470 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1471 {
1472         struct ieee80211_local *local =
1473                 container_of(work, struct ieee80211_local,
1474                              dynamic_ps_disable_work);
1475
1476         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1477                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1478                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1479         }
1480
1481         ieee80211_wake_queues_by_reason(&local->hw,
1482                                         IEEE80211_MAX_QUEUE_MAP,
1483                                         IEEE80211_QUEUE_STOP_REASON_PS);
1484 }
1485
1486 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1487 {
1488         struct ieee80211_local *local =
1489                 container_of(work, struct ieee80211_local,
1490                              dynamic_ps_enable_work);
1491         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1492         struct ieee80211_if_managed *ifmgd;
1493         unsigned long flags;
1494         int q;
1495
1496         /* can only happen when PS was just disabled anyway */
1497         if (!sdata)
1498                 return;
1499
1500         ifmgd = &sdata->u.mgd;
1501
1502         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1503                 return;
1504
1505         if (local->hw.conf.dynamic_ps_timeout > 0) {
1506                 /* don't enter PS if TX frames are pending */
1507                 if (drv_tx_frames_pending(local)) {
1508                         mod_timer(&local->dynamic_ps_timer, jiffies +
1509                                   msecs_to_jiffies(
1510                                   local->hw.conf.dynamic_ps_timeout));
1511                         return;
1512                 }
1513
1514                 /*
1515                  * transmission can be stopped by others which leads to
1516                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1517                  * is not the actual idle state.
1518                  */
1519                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1520                 for (q = 0; q < local->hw.queues; q++) {
1521                         if (local->queue_stop_reasons[q]) {
1522                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1523                                                        flags);
1524                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1525                                           msecs_to_jiffies(
1526                                           local->hw.conf.dynamic_ps_timeout));
1527                                 return;
1528                         }
1529                 }
1530                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1531         }
1532
1533         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1534             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1535                 if (drv_tx_frames_pending(local)) {
1536                         mod_timer(&local->dynamic_ps_timer, jiffies +
1537                                   msecs_to_jiffies(
1538                                   local->hw.conf.dynamic_ps_timeout));
1539                 } else {
1540                         ieee80211_send_nullfunc(local, sdata, 1);
1541                         /* Flush to get the tx status of nullfunc frame */
1542                         ieee80211_flush_queues(local, sdata);
1543                 }
1544         }
1545
1546         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1547               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1548             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1549                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1550                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1551                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1552         }
1553 }
1554
1555 void ieee80211_dynamic_ps_timer(unsigned long data)
1556 {
1557         struct ieee80211_local *local = (void *) data;
1558
1559         if (local->quiescing || local->suspended)
1560                 return;
1561
1562         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1563 }
1564
1565 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1566 {
1567         struct delayed_work *delayed_work =
1568                 container_of(work, struct delayed_work, work);
1569         struct ieee80211_sub_if_data *sdata =
1570                 container_of(delayed_work, struct ieee80211_sub_if_data,
1571                              dfs_cac_timer_work);
1572
1573         ieee80211_vif_release_channel(sdata);
1574
1575         cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1576 }
1577
1578 /* MLME */
1579 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1580                                      struct ieee80211_sub_if_data *sdata,
1581                                      const u8 *wmm_param, size_t wmm_param_len)
1582 {
1583         struct ieee80211_tx_queue_params params;
1584         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1585         size_t left;
1586         int count;
1587         const u8 *pos;
1588         u8 uapsd_queues = 0;
1589
1590         if (!local->ops->conf_tx)
1591                 return false;
1592
1593         if (local->hw.queues < IEEE80211_NUM_ACS)
1594                 return false;
1595
1596         if (!wmm_param)
1597                 return false;
1598
1599         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1600                 return false;
1601
1602         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1603                 uapsd_queues = ifmgd->uapsd_queues;
1604
1605         count = wmm_param[6] & 0x0f;
1606         if (count == ifmgd->wmm_last_param_set)
1607                 return false;
1608         ifmgd->wmm_last_param_set = count;
1609
1610         pos = wmm_param + 8;
1611         left = wmm_param_len - 8;
1612
1613         memset(&params, 0, sizeof(params));
1614
1615         sdata->wmm_acm = 0;
1616         for (; left >= 4; left -= 4, pos += 4) {
1617                 int aci = (pos[0] >> 5) & 0x03;
1618                 int acm = (pos[0] >> 4) & 0x01;
1619                 bool uapsd = false;
1620                 int queue;
1621
1622                 switch (aci) {
1623                 case 1: /* AC_BK */
1624                         queue = 3;
1625                         if (acm)
1626                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1627                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1628                                 uapsd = true;
1629                         break;
1630                 case 2: /* AC_VI */
1631                         queue = 1;
1632                         if (acm)
1633                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1634                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1635                                 uapsd = true;
1636                         break;
1637                 case 3: /* AC_VO */
1638                         queue = 0;
1639                         if (acm)
1640                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1641                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1642                                 uapsd = true;
1643                         break;
1644                 case 0: /* AC_BE */
1645                 default:
1646                         queue = 2;
1647                         if (acm)
1648                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1649                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1650                                 uapsd = true;
1651                         break;
1652                 }
1653
1654                 params.aifs = pos[0] & 0x0f;
1655                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1656                 params.cw_min = ecw2cw(pos[1] & 0x0f);
1657                 params.txop = get_unaligned_le16(pos + 2);
1658                 params.acm = acm;
1659                 params.uapsd = uapsd;
1660
1661                 mlme_dbg(sdata,
1662                          "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1663                          queue, aci, acm,
1664                          params.aifs, params.cw_min, params.cw_max,
1665                          params.txop, params.uapsd);
1666                 sdata->tx_conf[queue] = params;
1667                 if (drv_conf_tx(local, sdata, queue, &params))
1668                         sdata_err(sdata,
1669                                   "failed to set TX queue parameters for queue %d\n",
1670                                   queue);
1671         }
1672
1673         /* enable WMM or activate new settings */
1674         sdata->vif.bss_conf.qos = true;
1675         return true;
1676 }
1677
1678 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1679 {
1680         lockdep_assert_held(&sdata->local->mtx);
1681
1682         sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1683                                 IEEE80211_STA_BEACON_POLL);
1684         ieee80211_run_deferred_scan(sdata->local);
1685 }
1686
1687 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1688 {
1689         mutex_lock(&sdata->local->mtx);
1690         __ieee80211_stop_poll(sdata);
1691         mutex_unlock(&sdata->local->mtx);
1692 }
1693
1694 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1695                                            u16 capab, bool erp_valid, u8 erp)
1696 {
1697         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1698         u32 changed = 0;
1699         bool use_protection;
1700         bool use_short_preamble;
1701         bool use_short_slot;
1702
1703         if (erp_valid) {
1704                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1705                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1706         } else {
1707                 use_protection = false;
1708                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1709         }
1710
1711         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1712         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1713                 use_short_slot = true;
1714
1715         if (use_protection != bss_conf->use_cts_prot) {
1716                 bss_conf->use_cts_prot = use_protection;
1717                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1718         }
1719
1720         if (use_short_preamble != bss_conf->use_short_preamble) {
1721                 bss_conf->use_short_preamble = use_short_preamble;
1722                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1723         }
1724
1725         if (use_short_slot != bss_conf->use_short_slot) {
1726                 bss_conf->use_short_slot = use_short_slot;
1727                 changed |= BSS_CHANGED_ERP_SLOT;
1728         }
1729
1730         return changed;
1731 }
1732
1733 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1734                                      struct cfg80211_bss *cbss,
1735                                      u32 bss_info_changed)
1736 {
1737         struct ieee80211_bss *bss = (void *)cbss->priv;
1738         struct ieee80211_local *local = sdata->local;
1739         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1740
1741         bss_info_changed |= BSS_CHANGED_ASSOC;
1742         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1743                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1744
1745         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1746                 beacon_loss_count * bss_conf->beacon_int));
1747
1748         sdata->u.mgd.associated = cbss;
1749         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1750
1751         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1752
1753         if (sdata->vif.p2p) {
1754                 const struct cfg80211_bss_ies *ies;
1755
1756                 rcu_read_lock();
1757                 ies = rcu_dereference(cbss->ies);
1758                 if (ies) {
1759                         int ret;
1760
1761                         ret = cfg80211_get_p2p_attr(
1762                                         ies->data, ies->len,
1763                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1764                                         (u8 *) &bss_conf->p2p_noa_attr,
1765                                         sizeof(bss_conf->p2p_noa_attr));
1766                         if (ret >= 2) {
1767                                 sdata->u.mgd.p2p_noa_index =
1768                                         bss_conf->p2p_noa_attr.index;
1769                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1770                         }
1771                 }
1772                 rcu_read_unlock();
1773         }
1774
1775         /* just to be sure */
1776         ieee80211_stop_poll(sdata);
1777
1778         ieee80211_led_assoc(local, 1);
1779
1780         if (sdata->u.mgd.have_beacon) {
1781                 /*
1782                  * If the AP is buggy we may get here with no DTIM period
1783                  * known, so assume it's 1 which is the only safe assumption
1784                  * in that case, although if the TIM IE is broken powersave
1785                  * probably just won't work at all.
1786                  */
1787                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1788                 bss_conf->beacon_rate = bss->beacon_rate;
1789                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1790         } else {
1791                 bss_conf->beacon_rate = NULL;
1792                 bss_conf->dtim_period = 0;
1793         }
1794
1795         bss_conf->assoc = 1;
1796
1797         /* Tell the driver to monitor connection quality (if supported) */
1798         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1799             bss_conf->cqm_rssi_thold)
1800                 bss_info_changed |= BSS_CHANGED_CQM;
1801
1802         /* Enable ARP filtering */
1803         if (bss_conf->arp_addr_cnt)
1804                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1805
1806         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1807
1808         mutex_lock(&local->iflist_mtx);
1809         ieee80211_recalc_ps(local, -1);
1810         mutex_unlock(&local->iflist_mtx);
1811
1812         ieee80211_recalc_smps(sdata);
1813         ieee80211_recalc_ps_vif(sdata);
1814
1815         netif_carrier_on(sdata->dev);
1816 }
1817
1818 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1819                                    u16 stype, u16 reason, bool tx,
1820                                    u8 *frame_buf)
1821 {
1822         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1823         struct ieee80211_local *local = sdata->local;
1824         u32 changed = 0;
1825
1826         sdata_assert_lock(sdata);
1827
1828         if (WARN_ON_ONCE(tx && !frame_buf))
1829                 return;
1830
1831         if (WARN_ON(!ifmgd->associated))
1832                 return;
1833
1834         ieee80211_stop_poll(sdata);
1835
1836         ifmgd->associated = NULL;
1837         netif_carrier_off(sdata->dev);
1838
1839         /*
1840          * if we want to get out of ps before disassoc (why?) we have
1841          * to do it before sending disassoc, as otherwise the null-packet
1842          * won't be valid.
1843          */
1844         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1845                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1846                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1847         }
1848         local->ps_sdata = NULL;
1849
1850         /* disable per-vif ps */
1851         ieee80211_recalc_ps_vif(sdata);
1852
1853         /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1854         if (tx)
1855                 ieee80211_flush_queues(local, sdata);
1856
1857         /* deauthenticate/disassociate now */
1858         if (tx || frame_buf)
1859                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1860                                                reason, tx, frame_buf);
1861
1862         /* flush out frame */
1863         if (tx)
1864                 ieee80211_flush_queues(local, sdata);
1865
1866         /* clear bssid only after building the needed mgmt frames */
1867         memset(ifmgd->bssid, 0, ETH_ALEN);
1868
1869         /* remove AP and TDLS peers */
1870         sta_info_flush_defer(sdata);
1871
1872         /* finally reset all BSS / config parameters */
1873         changed |= ieee80211_reset_erp_info(sdata);
1874
1875         ieee80211_led_assoc(local, 0);
1876         changed |= BSS_CHANGED_ASSOC;
1877         sdata->vif.bss_conf.assoc = false;
1878
1879         ifmgd->p2p_noa_index = -1;
1880         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1881                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1882
1883         /* on the next assoc, re-program HT/VHT parameters */
1884         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1885         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1886         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1887         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1888
1889         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1890
1891         del_timer_sync(&local->dynamic_ps_timer);
1892         cancel_work_sync(&local->dynamic_ps_enable_work);
1893
1894         /* Disable ARP filtering */
1895         if (sdata->vif.bss_conf.arp_addr_cnt)
1896                 changed |= BSS_CHANGED_ARP_FILTER;
1897
1898         sdata->vif.bss_conf.qos = false;
1899         changed |= BSS_CHANGED_QOS;
1900
1901         /* The BSSID (not really interesting) and HT changed */
1902         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1903         ieee80211_bss_info_change_notify(sdata, changed);
1904
1905         /* disassociated - set to defaults now */
1906         ieee80211_set_wmm_default(sdata, false);
1907
1908         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1909         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1910         del_timer_sync(&sdata->u.mgd.timer);
1911         del_timer_sync(&sdata->u.mgd.chswitch_timer);
1912
1913         sdata->vif.bss_conf.dtim_period = 0;
1914         sdata->vif.bss_conf.beacon_rate = NULL;
1915
1916         ifmgd->have_beacon = false;
1917
1918         ifmgd->flags = 0;
1919         ieee80211_vif_release_channel(sdata);
1920 }
1921
1922 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1923                              struct ieee80211_hdr *hdr)
1924 {
1925         /*
1926          * We can postpone the mgd.timer whenever receiving unicast frames
1927          * from AP because we know that the connection is working both ways
1928          * at that time. But multicast frames (and hence also beacons) must
1929          * be ignored here, because we need to trigger the timer during
1930          * data idle periods for sending the periodic probe request to the
1931          * AP we're connected to.
1932          */
1933         if (is_multicast_ether_addr(hdr->addr1))
1934                 return;
1935
1936         ieee80211_sta_reset_conn_monitor(sdata);
1937 }
1938
1939 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1940 {
1941         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1942         struct ieee80211_local *local = sdata->local;
1943
1944         mutex_lock(&local->mtx);
1945         if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1946                               IEEE80211_STA_CONNECTION_POLL))) {
1947                 mutex_unlock(&local->mtx);
1948                 return;
1949         }
1950
1951         __ieee80211_stop_poll(sdata);
1952
1953         mutex_lock(&local->iflist_mtx);
1954         ieee80211_recalc_ps(local, -1);
1955         mutex_unlock(&local->iflist_mtx);
1956
1957         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1958                 goto out;
1959
1960         /*
1961          * We've received a probe response, but are not sure whether
1962          * we have or will be receiving any beacons or data, so let's
1963          * schedule the timers again, just in case.
1964          */
1965         ieee80211_sta_reset_beacon_monitor(sdata);
1966
1967         mod_timer(&ifmgd->conn_mon_timer,
1968                   round_jiffies_up(jiffies +
1969                                    IEEE80211_CONNECTION_IDLE_TIME));
1970 out:
1971         mutex_unlock(&local->mtx);
1972 }
1973
1974 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1975                              struct ieee80211_hdr *hdr, bool ack)
1976 {
1977         if (!ieee80211_is_data(hdr->frame_control))
1978             return;
1979
1980         if (ieee80211_is_nullfunc(hdr->frame_control) &&
1981             sdata->u.mgd.probe_send_count > 0) {
1982                 if (ack)
1983                         ieee80211_sta_reset_conn_monitor(sdata);
1984                 else
1985                         sdata->u.mgd.nullfunc_failed = true;
1986                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1987                 return;
1988         }
1989
1990         if (ack)
1991                 ieee80211_sta_reset_conn_monitor(sdata);
1992 }
1993
1994 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1995 {
1996         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1997         const u8 *ssid;
1998         u8 *dst = ifmgd->associated->bssid;
1999         u8 unicast_limit = max(1, max_probe_tries - 3);
2000
2001         /*
2002          * Try sending broadcast probe requests for the last three
2003          * probe requests after the first ones failed since some
2004          * buggy APs only support broadcast probe requests.
2005          */
2006         if (ifmgd->probe_send_count >= unicast_limit)
2007                 dst = NULL;
2008
2009         /*
2010          * When the hardware reports an accurate Tx ACK status, it's
2011          * better to send a nullfunc frame instead of a probe request,
2012          * as it will kick us off the AP quickly if we aren't associated
2013          * anymore. The timeout will be reset if the frame is ACKed by
2014          * the AP.
2015          */
2016         ifmgd->probe_send_count++;
2017
2018         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2019                 ifmgd->nullfunc_failed = false;
2020                 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2021         } else {
2022                 int ssid_len;
2023
2024                 rcu_read_lock();
2025                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2026                 if (WARN_ON_ONCE(ssid == NULL))
2027                         ssid_len = 0;
2028                 else
2029                         ssid_len = ssid[1];
2030
2031                 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2032                                          0, (u32) -1, true, 0,
2033                                          ifmgd->associated->channel, false);
2034                 rcu_read_unlock();
2035         }
2036
2037         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2038         run_again(sdata, ifmgd->probe_timeout);
2039         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2040                 ieee80211_flush_queues(sdata->local, sdata);
2041 }
2042
2043 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2044                                    bool beacon)
2045 {
2046         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2047         bool already = false;
2048
2049         if (!ieee80211_sdata_running(sdata))
2050                 return;
2051
2052         sdata_lock(sdata);
2053
2054         if (!ifmgd->associated)
2055                 goto out;
2056
2057         mutex_lock(&sdata->local->mtx);
2058
2059         if (sdata->local->tmp_channel || sdata->local->scanning) {
2060                 mutex_unlock(&sdata->local->mtx);
2061                 goto out;
2062         }
2063
2064         if (beacon) {
2065                 mlme_dbg_ratelimited(sdata,
2066                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2067                                      beacon_loss_count);
2068
2069                 ieee80211_cqm_rssi_notify(&sdata->vif,
2070                                           NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2071                                           GFP_KERNEL);
2072         }
2073
2074         /*
2075          * The driver/our work has already reported this event or the
2076          * connection monitoring has kicked in and we have already sent
2077          * a probe request. Or maybe the AP died and the driver keeps
2078          * reporting until we disassociate...
2079          *
2080          * In either case we have to ignore the current call to this
2081          * function (except for setting the correct probe reason bit)
2082          * because otherwise we would reset the timer every time and
2083          * never check whether we received a probe response!
2084          */
2085         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2086                             IEEE80211_STA_CONNECTION_POLL))
2087                 already = true;
2088
2089         if (beacon)
2090                 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2091         else
2092                 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2093
2094         mutex_unlock(&sdata->local->mtx);
2095
2096         if (already)
2097                 goto out;
2098
2099         mutex_lock(&sdata->local->iflist_mtx);
2100         ieee80211_recalc_ps(sdata->local, -1);
2101         mutex_unlock(&sdata->local->iflist_mtx);
2102
2103         ifmgd->probe_send_count = 0;
2104         ieee80211_mgd_probe_ap_send(sdata);
2105  out:
2106         sdata_unlock(sdata);
2107 }
2108
2109 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2110                                           struct ieee80211_vif *vif)
2111 {
2112         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2113         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2114         struct cfg80211_bss *cbss;
2115         struct sk_buff *skb;
2116         const u8 *ssid;
2117         int ssid_len;
2118
2119         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2120                 return NULL;
2121
2122         sdata_assert_lock(sdata);
2123
2124         if (ifmgd->associated)
2125                 cbss = ifmgd->associated;
2126         else if (ifmgd->auth_data)
2127                 cbss = ifmgd->auth_data->bss;
2128         else if (ifmgd->assoc_data)
2129                 cbss = ifmgd->assoc_data->bss;
2130         else
2131                 return NULL;
2132
2133         rcu_read_lock();
2134         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2135         if (WARN_ON_ONCE(ssid == NULL))
2136                 ssid_len = 0;
2137         else
2138                 ssid_len = ssid[1];
2139
2140         skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2141                                         (u32) -1, cbss->channel,
2142                                         ssid + 2, ssid_len,
2143                                         NULL, 0, true);
2144         rcu_read_unlock();
2145
2146         return skb;
2147 }
2148 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2149
2150 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2151 {
2152         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2153         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2154
2155         sdata_lock(sdata);
2156         if (!ifmgd->associated) {
2157                 sdata_unlock(sdata);
2158                 return;
2159         }
2160
2161         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2162                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2163                                true, frame_buf);
2164         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2165         ieee80211_wake_queues_by_reason(&sdata->local->hw,
2166                                         IEEE80211_MAX_QUEUE_MAP,
2167                                         IEEE80211_QUEUE_STOP_REASON_CSA);
2168
2169         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2170                               IEEE80211_DEAUTH_FRAME_LEN);
2171         sdata_unlock(sdata);
2172 }
2173
2174 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2175 {
2176         struct ieee80211_sub_if_data *sdata =
2177                 container_of(work, struct ieee80211_sub_if_data,
2178                              u.mgd.beacon_connection_loss_work);
2179         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2180         struct sta_info *sta;
2181
2182         if (ifmgd->associated) {
2183                 rcu_read_lock();
2184                 sta = sta_info_get(sdata, ifmgd->bssid);
2185                 if (sta)
2186                         sta->beacon_loss_count++;
2187                 rcu_read_unlock();
2188         }
2189
2190         if (ifmgd->connection_loss) {
2191                 sdata_info(sdata, "Connection to AP %pM lost\n",
2192                            ifmgd->bssid);
2193                 __ieee80211_disconnect(sdata);
2194         } else {
2195                 ieee80211_mgd_probe_ap(sdata, true);
2196         }
2197 }
2198
2199 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2200 {
2201         struct ieee80211_sub_if_data *sdata =
2202                 container_of(work, struct ieee80211_sub_if_data,
2203                              u.mgd.csa_connection_drop_work);
2204
2205         __ieee80211_disconnect(sdata);
2206 }
2207
2208 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2209 {
2210         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2211         struct ieee80211_hw *hw = &sdata->local->hw;
2212
2213         trace_api_beacon_loss(sdata);
2214
2215         sdata->u.mgd.connection_loss = false;
2216         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2217 }
2218 EXPORT_SYMBOL(ieee80211_beacon_loss);
2219
2220 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2221 {
2222         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2223         struct ieee80211_hw *hw = &sdata->local->hw;
2224
2225         trace_api_connection_loss(sdata);
2226
2227         sdata->u.mgd.connection_loss = true;
2228         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2229 }
2230 EXPORT_SYMBOL(ieee80211_connection_loss);
2231
2232
2233 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2234                                         bool assoc)
2235 {
2236         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2237
2238         sdata_assert_lock(sdata);
2239
2240         if (!assoc) {
2241                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2242
2243                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2244                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2245                 sdata->u.mgd.flags = 0;
2246                 ieee80211_vif_release_channel(sdata);
2247         }
2248
2249         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2250         kfree(auth_data);
2251         sdata->u.mgd.auth_data = NULL;
2252 }
2253
2254 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2255                                      struct ieee80211_mgmt *mgmt, size_t len)
2256 {
2257         struct ieee80211_local *local = sdata->local;
2258         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2259         u8 *pos;
2260         struct ieee802_11_elems elems;
2261         u32 tx_flags = 0;
2262
2263         pos = mgmt->u.auth.variable;
2264         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2265         if (!elems.challenge)
2266                 return;
2267         auth_data->expected_transaction = 4;
2268         drv_mgd_prepare_tx(sdata->local, sdata);
2269         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2270                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2271                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2272         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2273                             elems.challenge - 2, elems.challenge_len + 2,
2274                             auth_data->bss->bssid, auth_data->bss->bssid,
2275                             auth_data->key, auth_data->key_len,
2276                             auth_data->key_idx, tx_flags);
2277 }
2278
2279 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2280                                    struct ieee80211_mgmt *mgmt, size_t len)
2281 {
2282         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2283         u8 bssid[ETH_ALEN];
2284         u16 auth_alg, auth_transaction, status_code;
2285         struct sta_info *sta;
2286
2287         sdata_assert_lock(sdata);
2288
2289         if (len < 24 + 6)
2290                 return;
2291
2292         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2293                 return;
2294
2295         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2296
2297         if (!ether_addr_equal(bssid, mgmt->bssid))
2298                 return;
2299
2300         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2301         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2302         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2303
2304         if (auth_alg != ifmgd->auth_data->algorithm ||
2305             auth_transaction != ifmgd->auth_data->expected_transaction) {
2306                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2307                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2308                            auth_transaction,
2309                            ifmgd->auth_data->expected_transaction);
2310                 return;
2311         }
2312
2313         if (status_code != WLAN_STATUS_SUCCESS) {
2314                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2315                            mgmt->sa, status_code);
2316                 ieee80211_destroy_auth_data(sdata, false);
2317                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2318                 return;
2319         }
2320
2321         switch (ifmgd->auth_data->algorithm) {
2322         case WLAN_AUTH_OPEN:
2323         case WLAN_AUTH_LEAP:
2324         case WLAN_AUTH_FT:
2325         case WLAN_AUTH_SAE:
2326                 break;
2327         case WLAN_AUTH_SHARED_KEY:
2328                 if (ifmgd->auth_data->expected_transaction != 4) {
2329                         ieee80211_auth_challenge(sdata, mgmt, len);
2330                         /* need another frame */
2331                         return;
2332                 }
2333                 break;
2334         default:
2335                 WARN_ONCE(1, "invalid auth alg %d",
2336                           ifmgd->auth_data->algorithm);
2337                 return;
2338         }
2339
2340         sdata_info(sdata, "authenticated\n");
2341         ifmgd->auth_data->done = true;
2342         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2343         ifmgd->auth_data->timeout_started = true;
2344         run_again(sdata, ifmgd->auth_data->timeout);
2345
2346         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2347             ifmgd->auth_data->expected_transaction != 2) {
2348                 /*
2349                  * Report auth frame to user space for processing since another
2350                  * round of Authentication frames is still needed.
2351                  */
2352                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2353                 return;
2354         }
2355
2356         /* move station state to auth */
2357         mutex_lock(&sdata->local->sta_mtx);
2358         sta = sta_info_get(sdata, bssid);
2359         if (!sta) {
2360                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2361                 goto out_err;
2362         }
2363         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2364                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2365                 goto out_err;
2366         }
2367         mutex_unlock(&sdata->local->sta_mtx);
2368
2369         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2370         return;
2371  out_err:
2372         mutex_unlock(&sdata->local->sta_mtx);
2373         /* ignore frame -- wait for timeout */
2374 }
2375
2376
2377 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2378                                      struct ieee80211_mgmt *mgmt, size_t len)
2379 {
2380         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2381         const u8 *bssid = NULL;
2382         u16 reason_code;
2383
2384         sdata_assert_lock(sdata);
2385
2386         if (len < 24 + 2)
2387                 return;
2388
2389         if (!ifmgd->associated ||
2390             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2391                 return;
2392
2393         bssid = ifmgd->associated->bssid;
2394
2395         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2396
2397         sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2398                    bssid, reason_code);
2399
2400         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2401
2402         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2403 }
2404
2405
2406 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2407                                        struct ieee80211_mgmt *mgmt, size_t len)
2408 {
2409         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2410         u16 reason_code;
2411
2412         sdata_assert_lock(sdata);
2413
2414         if (len < 24 + 2)
2415                 return;
2416
2417         if (!ifmgd->associated ||
2418             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2419                 return;
2420
2421         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2422
2423         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2424                    mgmt->sa, reason_code);
2425
2426         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2427
2428         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2429 }
2430
2431 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2432                                 u8 *supp_rates, unsigned int supp_rates_len,
2433                                 u32 *rates, u32 *basic_rates,
2434                                 bool *have_higher_than_11mbit,
2435                                 int *min_rate, int *min_rate_index)
2436 {
2437         int i, j;
2438
2439         for (i = 0; i < supp_rates_len; i++) {
2440                 int rate = (supp_rates[i] & 0x7f) * 5;
2441                 bool is_basic = !!(supp_rates[i] & 0x80);
2442
2443                 if (rate > 110)
2444                         *have_higher_than_11mbit = true;
2445
2446                 /*
2447                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2448                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2449                  *
2450                  * Note: Even through the membership selector and the basic
2451                  *       rate flag share the same bit, they are not exactly
2452                  *       the same.
2453                  */
2454                 if (!!(supp_rates[i] & 0x80) &&
2455                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2456                         continue;
2457
2458                 for (j = 0; j < sband->n_bitrates; j++) {
2459                         if (sband->bitrates[j].bitrate == rate) {
2460                                 *rates |= BIT(j);
2461                                 if (is_basic)
2462                                         *basic_rates |= BIT(j);
2463                                 if (rate < *min_rate) {
2464                                         *min_rate = rate;
2465                                         *min_rate_index = j;
2466                                 }
2467                                 break;
2468                         }
2469                 }
2470         }
2471 }
2472
2473 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2474                                          bool assoc)
2475 {
2476         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2477
2478         sdata_assert_lock(sdata);
2479
2480         if (!assoc) {
2481                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2482
2483                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2484                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2485                 sdata->u.mgd.flags = 0;
2486                 ieee80211_vif_release_channel(sdata);
2487         }
2488
2489         kfree(assoc_data);
2490         sdata->u.mgd.assoc_data = NULL;
2491 }
2492
2493 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2494                                     struct cfg80211_bss *cbss,
2495                                     struct ieee80211_mgmt *mgmt, size_t len)
2496 {
2497         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2498         struct ieee80211_local *local = sdata->local;
2499         struct ieee80211_supported_band *sband;
2500         struct sta_info *sta;
2501         u8 *pos;
2502         u16 capab_info, aid;
2503         struct ieee802_11_elems elems;
2504         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2505         const struct cfg80211_bss_ies *bss_ies = NULL;
2506         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2507         u32 changed = 0;
2508         int err;
2509         bool ret;
2510
2511         /* AssocResp and ReassocResp have identical structure */
2512
2513         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2514         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2515
2516         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2517                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2518                            aid);
2519         aid &= ~(BIT(15) | BIT(14));
2520
2521         ifmgd->broken_ap = false;
2522
2523         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2524                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2525                            aid);
2526                 aid = 0;
2527                 ifmgd->broken_ap = true;
2528         }
2529
2530         pos = mgmt->u.assoc_resp.variable;
2531         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2532
2533         if (!elems.supp_rates) {
2534                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2535                 return false;
2536         }
2537
2538         ifmgd->aid = aid;
2539
2540         /*
2541          * Some APs are erroneously not including some information in their
2542          * (re)association response frames. Try to recover by using the data
2543          * from the beacon or probe response. This seems to afflict mobile
2544          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2545          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2546          */
2547         if ((assoc_data->wmm && !elems.wmm_param) ||
2548             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2549              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2550             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2551              (!elems.vht_cap_elem || !elems.vht_operation))) {
2552                 const struct cfg80211_bss_ies *ies;
2553                 struct ieee802_11_elems bss_elems;
2554
2555                 rcu_read_lock();
2556                 ies = rcu_dereference(cbss->ies);
2557                 if (ies)
2558                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2559                                           GFP_ATOMIC);
2560                 rcu_read_unlock();
2561                 if (!bss_ies)
2562                         return false;
2563
2564                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2565                                        false, &bss_elems);
2566                 if (assoc_data->wmm &&
2567                     !elems.wmm_param && bss_elems.wmm_param) {
2568                         elems.wmm_param = bss_elems.wmm_param;
2569                         sdata_info(sdata,
2570                                    "AP bug: WMM param missing from AssocResp\n");
2571                 }
2572
2573                 /*
2574                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2575                  * have to include the IEs in the (re)association response.
2576                  */
2577                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2578                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2579                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2580                         sdata_info(sdata,
2581                                    "AP bug: HT capability missing from AssocResp\n");
2582                 }
2583                 if (!elems.ht_operation && bss_elems.ht_operation &&
2584                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2585                         elems.ht_operation = bss_elems.ht_operation;
2586                         sdata_info(sdata,
2587                                    "AP bug: HT operation missing from AssocResp\n");
2588                 }
2589                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2590                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2591                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2592                         sdata_info(sdata,
2593                                    "AP bug: VHT capa missing from AssocResp\n");
2594                 }
2595                 if (!elems.vht_operation && bss_elems.vht_operation &&
2596                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2597                         elems.vht_operation = bss_elems.vht_operation;
2598                         sdata_info(sdata,
2599                                    "AP bug: VHT operation missing from AssocResp\n");
2600                 }
2601         }
2602
2603         /*
2604          * We previously checked these in the beacon/probe response, so
2605          * they should be present here. This is just a safety net.
2606          */
2607         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2608             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2609                 sdata_info(sdata,
2610                            "HT AP is missing WMM params or HT capability/operation\n");
2611                 ret = false;
2612                 goto out;
2613         }
2614
2615         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2616             (!elems.vht_cap_elem || !elems.vht_operation)) {
2617                 sdata_info(sdata,
2618                            "VHT AP is missing VHT capability/operation\n");
2619                 ret = false;
2620                 goto out;
2621         }
2622
2623         mutex_lock(&sdata->local->sta_mtx);
2624         /*
2625          * station info was already allocated and inserted before
2626          * the association and should be available to us
2627          */
2628         sta = sta_info_get(sdata, cbss->bssid);
2629         if (WARN_ON(!sta)) {
2630                 mutex_unlock(&sdata->local->sta_mtx);
2631                 ret = false;
2632                 goto out;
2633         }
2634
2635         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2636
2637         /* Set up internal HT/VHT capabilities */
2638         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2639                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2640                                                   elems.ht_cap_elem, sta);
2641
2642         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2643                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2644                                                     elems.vht_cap_elem, sta);
2645
2646         /*
2647          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2648          * in their association response, so ignore that data for our own
2649          * configuration. If it changed since the last beacon, we'll get the
2650          * next beacon and update then.
2651          */
2652
2653         /*
2654          * If an operating mode notification IE is present, override the
2655          * NSS calculation (that would be done in rate_control_rate_init())
2656          * and use the # of streams from that element.
2657          */
2658         if (elems.opmode_notif &&
2659             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2660                 u8 nss;
2661
2662                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2663                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2664                 nss += 1;
2665                 sta->sta.rx_nss = nss;
2666         }
2667
2668         rate_control_rate_init(sta);
2669
2670         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2671                 set_sta_flag(sta, WLAN_STA_MFP);
2672
2673         if (elems.wmm_param)
2674                 set_sta_flag(sta, WLAN_STA_WME);
2675
2676         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2677         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2678                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2679         if (err) {
2680                 sdata_info(sdata,
2681                            "failed to move station %pM to desired state\n",
2682                            sta->sta.addr);
2683                 WARN_ON(__sta_info_destroy(sta));
2684                 mutex_unlock(&sdata->local->sta_mtx);
2685                 ret = false;
2686                 goto out;
2687         }
2688
2689         mutex_unlock(&sdata->local->sta_mtx);
2690
2691         /*
2692          * Always handle WMM once after association regardless
2693          * of the first value the AP uses. Setting -1 here has
2694          * that effect because the AP values is an unsigned
2695          * 4-bit value.
2696          */
2697         ifmgd->wmm_last_param_set = -1;
2698
2699         if (elems.wmm_param)
2700                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2701                                          elems.wmm_param_len);
2702         else
2703                 ieee80211_set_wmm_default(sdata, false);
2704         changed |= BSS_CHANGED_QOS;
2705
2706         /* set AID and assoc capability,
2707          * ieee80211_set_associated() will tell the driver */
2708         bss_conf->aid = aid;
2709         bss_conf->assoc_capability = capab_info;
2710         ieee80211_set_associated(sdata, cbss, changed);
2711
2712         /*
2713          * If we're using 4-addr mode, let the AP know that we're
2714          * doing so, so that it can create the STA VLAN on its side
2715          */
2716         if (ifmgd->use_4addr)
2717                 ieee80211_send_4addr_nullfunc(local, sdata);
2718
2719         /*
2720          * Start timer to probe the connection to the AP now.
2721          * Also start the timer that will detect beacon loss.
2722          */
2723         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2724         ieee80211_sta_reset_beacon_monitor(sdata);
2725
2726         ret = true;
2727  out:
2728         kfree(bss_ies);
2729         return ret;
2730 }
2731
2732 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2733                                          struct ieee80211_mgmt *mgmt,
2734                                          size_t len)
2735 {
2736         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2737         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2738         u16 capab_info, status_code, aid;
2739         struct ieee802_11_elems elems;
2740         u8 *pos;
2741         bool reassoc;
2742         struct cfg80211_bss *bss;
2743
2744         sdata_assert_lock(sdata);
2745
2746         if (!assoc_data)
2747                 return;
2748         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2749                 return;
2750
2751         /*
2752          * AssocResp and ReassocResp have identical structure, so process both
2753          * of them in this function.
2754          */
2755
2756         if (len < 24 + 6)
2757                 return;
2758
2759         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2760         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2761         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2762         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2763
2764         sdata_info(sdata,
2765                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2766                    reassoc ? "Rea" : "A", mgmt->sa,
2767                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2768
2769         pos = mgmt->u.assoc_resp.variable;
2770         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2771
2772         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2773             elems.timeout_int &&
2774             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2775                 u32 tu, ms;
2776                 tu = le32_to_cpu(elems.timeout_int->value);
2777                 ms = tu * 1024 / 1000;
2778                 sdata_info(sdata,
2779                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2780                            mgmt->sa, tu, ms);
2781                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2782                 assoc_data->timeout_started = true;
2783                 if (ms > IEEE80211_ASSOC_TIMEOUT)
2784                         run_again(sdata, assoc_data->timeout);
2785                 return;
2786         }
2787
2788         bss = assoc_data->bss;
2789
2790         if (status_code != WLAN_STATUS_SUCCESS) {
2791                 sdata_info(sdata, "%pM denied association (code=%d)\n",
2792                            mgmt->sa, status_code);
2793                 ieee80211_destroy_assoc_data(sdata, false);
2794         } else {
2795                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2796                         /* oops -- internal error -- send timeout for now */
2797                         ieee80211_destroy_assoc_data(sdata, false);
2798                         cfg80211_assoc_timeout(sdata->dev, bss);
2799                         return;
2800                 }
2801                 sdata_info(sdata, "associated\n");
2802
2803                 /*
2804                  * destroy assoc_data afterwards, as otherwise an idle
2805                  * recalc after assoc_data is NULL but before associated
2806                  * is set can cause the interface to go idle
2807                  */
2808                 ieee80211_destroy_assoc_data(sdata, true);
2809         }
2810
2811         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2812 }
2813
2814 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2815                                   struct ieee80211_mgmt *mgmt, size_t len,
2816                                   struct ieee80211_rx_status *rx_status,
2817                                   struct ieee802_11_elems *elems)
2818 {
2819         struct ieee80211_local *local = sdata->local;
2820         int freq;
2821         struct ieee80211_bss *bss;
2822         struct ieee80211_channel *channel;
2823
2824         sdata_assert_lock(sdata);
2825
2826         if (elems->ds_params)
2827                 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2828                                                       rx_status->band);
2829         else
2830                 freq = rx_status->freq;
2831
2832         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2833
2834         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2835                 return;
2836
2837         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2838                                         channel);
2839         if (bss) {
2840                 ieee80211_rx_bss_put(local, bss);
2841                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2842         }
2843
2844         if (!sdata->u.mgd.associated ||
2845             !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
2846                 return;
2847
2848         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2849                                          elems, true);
2850
2851 }
2852
2853
2854 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2855                                          struct sk_buff *skb)
2856 {
2857         struct ieee80211_mgmt *mgmt = (void *)skb->data;
2858         struct ieee80211_if_managed *ifmgd;
2859         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2860         size_t baselen, len = skb->len;
2861         struct ieee802_11_elems elems;
2862
2863         ifmgd = &sdata->u.mgd;
2864
2865         sdata_assert_lock(sdata);
2866
2867         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2868                 return; /* ignore ProbeResp to foreign address */
2869
2870         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2871         if (baselen > len)
2872                 return;
2873
2874         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2875                                false, &elems);
2876
2877         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2878
2879         if (ifmgd->associated &&
2880             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2881                 ieee80211_reset_ap_probe(sdata);
2882
2883         if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2884             ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2885                 /* got probe response, continue with auth */
2886                 sdata_info(sdata, "direct probe responded\n");
2887                 ifmgd->auth_data->tries = 0;
2888                 ifmgd->auth_data->timeout = jiffies;
2889                 ifmgd->auth_data->timeout_started = true;
2890                 run_again(sdata, ifmgd->auth_data->timeout);
2891         }
2892 }
2893
2894 /*
2895  * This is the canonical list of information elements we care about,
2896  * the filter code also gives us all changes to the Microsoft OUI
2897  * (00:50:F2) vendor IE which is used for WMM which we need to track.
2898  *
2899  * We implement beacon filtering in software since that means we can
2900  * avoid processing the frame here and in cfg80211, and userspace
2901  * will not be able to tell whether the hardware supports it or not.
2902  *
2903  * XXX: This list needs to be dynamic -- userspace needs to be able to
2904  *      add items it requires. It also needs to be able to tell us to
2905  *      look out for other vendor IEs.
2906  */
2907 static const u64 care_about_ies =
2908         (1ULL << WLAN_EID_COUNTRY) |
2909         (1ULL << WLAN_EID_ERP_INFO) |
2910         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2911         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2912         (1ULL << WLAN_EID_HT_CAPABILITY) |
2913         (1ULL << WLAN_EID_HT_OPERATION);
2914
2915 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2916                                      struct ieee80211_mgmt *mgmt, size_t len,
2917                                      struct ieee80211_rx_status *rx_status)
2918 {
2919         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2920         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2921         size_t baselen;
2922         struct ieee802_11_elems elems;
2923         struct ieee80211_local *local = sdata->local;
2924         struct ieee80211_chanctx_conf *chanctx_conf;
2925         struct ieee80211_channel *chan;
2926         struct sta_info *sta;
2927         u32 changed = 0;
2928         bool erp_valid;
2929         u8 erp_value = 0;
2930         u32 ncrc;
2931         u8 *bssid;
2932         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2933
2934         sdata_assert_lock(sdata);
2935
2936         /* Process beacon from the current BSS */
2937         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2938         if (baselen > len)
2939                 return;
2940
2941         rcu_read_lock();
2942         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2943         if (!chanctx_conf) {
2944                 rcu_read_unlock();
2945                 return;
2946         }
2947
2948         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2949                 rcu_read_unlock();
2950                 return;
2951         }
2952         chan = chanctx_conf->def.chan;
2953         rcu_read_unlock();
2954
2955         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2956             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2957                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2958                                        len - baselen, false, &elems);
2959
2960                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2961                 if (elems.tim && !elems.parse_error) {
2962                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
2963                         ifmgd->dtim_period = tim_ie->dtim_period;
2964                 }
2965                 ifmgd->have_beacon = true;
2966                 ifmgd->assoc_data->need_beacon = false;
2967                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2968                         sdata->vif.bss_conf.sync_tsf =
2969                                 le64_to_cpu(mgmt->u.beacon.timestamp);
2970                         sdata->vif.bss_conf.sync_device_ts =
2971                                 rx_status->device_timestamp;
2972                         if (elems.tim)
2973                                 sdata->vif.bss_conf.sync_dtim_count =
2974                                         elems.tim->dtim_count;
2975                         else
2976                                 sdata->vif.bss_conf.sync_dtim_count = 0;
2977                 }
2978                 /* continue assoc process */
2979                 ifmgd->assoc_data->timeout = jiffies;
2980                 ifmgd->assoc_data->timeout_started = true;
2981                 run_again(sdata, ifmgd->assoc_data->timeout);
2982                 return;
2983         }
2984
2985         if (!ifmgd->associated ||
2986             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2987                 return;
2988         bssid = ifmgd->associated->bssid;
2989
2990         /* Track average RSSI from the Beacon frames of the current AP */
2991         ifmgd->last_beacon_signal = rx_status->signal;
2992         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2993                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2994                 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2995                 ifmgd->last_cqm_event_signal = 0;
2996                 ifmgd->count_beacon_signal = 1;
2997                 ifmgd->last_ave_beacon_signal = 0;
2998         } else {
2999                 ifmgd->ave_beacon_signal =
3000                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3001                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3002                          ifmgd->ave_beacon_signal) / 16;
3003                 ifmgd->count_beacon_signal++;
3004         }
3005
3006         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3007             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3008                 int sig = ifmgd->ave_beacon_signal;
3009                 int last_sig = ifmgd->last_ave_beacon_signal;
3010
3011                 /*
3012                  * if signal crosses either of the boundaries, invoke callback
3013                  * with appropriate parameters
3014                  */
3015                 if (sig > ifmgd->rssi_max_thold &&
3016                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3017                         ifmgd->last_ave_beacon_signal = sig;
3018                         drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3019                 } else if (sig < ifmgd->rssi_min_thold &&
3020                            (last_sig >= ifmgd->rssi_max_thold ||
3021                            last_sig == 0)) {
3022                         ifmgd->last_ave_beacon_signal = sig;
3023                         drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3024                 }
3025         }
3026
3027         if (bss_conf->cqm_rssi_thold &&
3028             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3029             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3030                 int sig = ifmgd->ave_beacon_signal / 16;
3031                 int last_event = ifmgd->last_cqm_event_signal;
3032                 int thold = bss_conf->cqm_rssi_thold;
3033                 int hyst = bss_conf->cqm_rssi_hyst;
3034                 if (sig < thold &&
3035                     (last_event == 0 || sig < last_event - hyst)) {
3036                         ifmgd->last_cqm_event_signal = sig;
3037                         ieee80211_cqm_rssi_notify(
3038                                 &sdata->vif,
3039                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3040                                 GFP_KERNEL);
3041                 } else if (sig > thold &&
3042                            (last_event == 0 || sig > last_event + hyst)) {
3043                         ifmgd->last_cqm_event_signal = sig;
3044                         ieee80211_cqm_rssi_notify(
3045                                 &sdata->vif,
3046                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3047                                 GFP_KERNEL);
3048                 }
3049         }
3050
3051         if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
3052                 mlme_dbg_ratelimited(sdata,
3053                                      "cancelling AP probe due to a received beacon\n");
3054                 mutex_lock(&local->mtx);
3055                 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
3056                 ieee80211_run_deferred_scan(local);
3057                 mutex_unlock(&local->mtx);
3058
3059                 mutex_lock(&local->iflist_mtx);
3060                 ieee80211_recalc_ps(local, -1);
3061                 mutex_unlock(&local->iflist_mtx);
3062         }
3063
3064         /*
3065          * Push the beacon loss detection into the future since
3066          * we are processing a beacon from the AP just now.
3067          */
3068         ieee80211_sta_reset_beacon_monitor(sdata);
3069
3070         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3071         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3072                                           len - baselen, false, &elems,
3073                                           care_about_ies, ncrc);
3074
3075         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3076                 bool directed_tim = ieee80211_check_tim(elems.tim,
3077                                                         elems.tim_len,
3078                                                         ifmgd->aid);
3079                 if (directed_tim) {
3080                         if (local->hw.conf.dynamic_ps_timeout > 0) {
3081                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3082                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3083                                         ieee80211_hw_config(local,
3084                                                             IEEE80211_CONF_CHANGE_PS);
3085                                 }
3086                                 ieee80211_send_nullfunc(local, sdata, 0);
3087                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
3088                                 local->pspolling = true;
3089
3090                                 /*
3091                                  * Here is assumed that the driver will be
3092                                  * able to send ps-poll frame and receive a
3093                                  * response even though power save mode is
3094                                  * enabled, but some drivers might require
3095                                  * to disable power save here. This needs
3096                                  * to be investigated.
3097                                  */
3098                                 ieee80211_send_pspoll(local, sdata);
3099                         }
3100                 }
3101         }
3102
3103         if (sdata->vif.p2p) {
3104                 struct ieee80211_p2p_noa_attr noa = {};
3105                 int ret;
3106
3107                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3108                                             len - baselen,
3109                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3110                                             (u8 *) &noa, sizeof(noa));
3111                 if (ret >= 2) {
3112                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3113                                 /* valid noa_attr and index changed */
3114                                 sdata->u.mgd.p2p_noa_index = noa.index;
3115                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3116                                 changed |= BSS_CHANGED_P2P_PS;
3117                                 /*
3118                                  * make sure we update all information, the CRC
3119                                  * mechanism doesn't look at P2P attributes.
3120                                  */
3121                                 ifmgd->beacon_crc_valid = false;
3122                         }
3123                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3124                         /* noa_attr not found and we had valid noa_attr before */
3125                         sdata->u.mgd.p2p_noa_index = -1;
3126                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3127                         changed |= BSS_CHANGED_P2P_PS;
3128                         ifmgd->beacon_crc_valid = false;
3129                 }
3130         }
3131
3132         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3133                 return;
3134         ifmgd->beacon_crc = ncrc;
3135         ifmgd->beacon_crc_valid = true;
3136
3137         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3138
3139         if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3140                                      elems.wmm_param_len))
3141                 changed |= BSS_CHANGED_QOS;
3142
3143         /*
3144          * If we haven't had a beacon before, tell the driver about the
3145          * DTIM period (and beacon timing if desired) now.
3146          */
3147         if (!ifmgd->have_beacon) {
3148                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3149                 if (elems.tim)
3150                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3151                 else
3152                         bss_conf->dtim_period = 1;
3153
3154                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3155                         sdata->vif.bss_conf.sync_tsf =
3156                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3157                         sdata->vif.bss_conf.sync_device_ts =
3158                                 rx_status->device_timestamp;
3159                         if (elems.tim)
3160                                 sdata->vif.bss_conf.sync_dtim_count =
3161                                         elems.tim->dtim_count;
3162                         else
3163                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3164                 }
3165
3166                 changed |= BSS_CHANGED_BEACON_INFO;
3167                 ifmgd->have_beacon = true;
3168
3169                 mutex_lock(&local->iflist_mtx);
3170                 ieee80211_recalc_ps(local, -1);
3171                 mutex_unlock(&local->iflist_mtx);
3172
3173                 ieee80211_recalc_ps_vif(sdata);
3174         }
3175
3176         if (elems.erp_info) {
3177                 erp_valid = true;
3178                 erp_value = elems.erp_info[0];
3179         } else {
3180                 erp_valid = false;
3181         }
3182         changed |= ieee80211_handle_bss_capability(sdata,
3183                         le16_to_cpu(mgmt->u.beacon.capab_info),
3184                         erp_valid, erp_value);
3185
3186         mutex_lock(&local->sta_mtx);
3187         sta = sta_info_get(sdata, bssid);
3188
3189         if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3190                                 elems.vht_operation, bssid, &changed)) {
3191                 mutex_unlock(&local->sta_mtx);
3192                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3193                                        WLAN_REASON_DEAUTH_LEAVING,
3194                                        true, deauth_buf);
3195                 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3196                                       sizeof(deauth_buf));
3197                 return;
3198         }
3199
3200         if (sta && elems.opmode_notif)
3201                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3202                                             rx_status->band, true);
3203         mutex_unlock(&local->sta_mtx);
3204
3205         if (elems.country_elem && elems.pwr_constr_elem &&
3206             mgmt->u.probe_resp.capab_info &
3207                                 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3208                 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3209                                                        elems.country_elem,
3210                                                        elems.country_elem_len,
3211                                                        elems.pwr_constr_elem);
3212
3213         ieee80211_bss_info_change_notify(sdata, changed);
3214 }
3215
3216 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3217                                   struct sk_buff *skb)
3218 {
3219         struct ieee80211_rx_status *rx_status;
3220         struct ieee80211_mgmt *mgmt;
3221         u16 fc;
3222         struct ieee802_11_elems elems;
3223         int ies_len;
3224
3225         rx_status = (struct ieee80211_rx_status *) skb->cb;
3226         mgmt = (struct ieee80211_mgmt *) skb->data;
3227         fc = le16_to_cpu(mgmt->frame_control);
3228
3229         sdata_lock(sdata);
3230
3231         switch (fc & IEEE80211_FCTL_STYPE) {
3232         case IEEE80211_STYPE_BEACON:
3233                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3234                 break;
3235         case IEEE80211_STYPE_PROBE_RESP:
3236                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3237                 break;
3238         case IEEE80211_STYPE_AUTH:
3239                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3240                 break;
3241         case IEEE80211_STYPE_DEAUTH:
3242                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3243                 break;
3244         case IEEE80211_STYPE_DISASSOC:
3245                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3246                 break;
3247         case IEEE80211_STYPE_ASSOC_RESP:
3248         case IEEE80211_STYPE_REASSOC_RESP:
3249                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3250                 break;
3251         case IEEE80211_STYPE_ACTION:
3252                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3253                         ies_len = skb->len -
3254                                   offsetof(struct ieee80211_mgmt,
3255                                            u.action.u.chan_switch.variable);
3256
3257                         if (ies_len < 0)
3258                                 break;
3259
3260                         ieee802_11_parse_elems(
3261                                 mgmt->u.action.u.chan_switch.variable,
3262                                 ies_len, true, &elems);
3263
3264                         if (elems.parse_error)
3265                                 break;
3266
3267                         ieee80211_sta_process_chanswitch(sdata,
3268                                                          rx_status->mactime,
3269                                                          &elems, false);
3270                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3271                         ies_len = skb->len -
3272                                   offsetof(struct ieee80211_mgmt,
3273                                            u.action.u.ext_chan_switch.variable);
3274
3275                         if (ies_len < 0)
3276                                 break;
3277
3278                         ieee802_11_parse_elems(
3279                                 mgmt->u.action.u.ext_chan_switch.variable,
3280                                 ies_len, true, &elems);
3281
3282                         if (elems.parse_error)
3283                                 break;
3284
3285                         /* for the handling code pretend this was also an IE */
3286                         elems.ext_chansw_ie =
3287                                 &mgmt->u.action.u.ext_chan_switch.data;
3288
3289                         ieee80211_sta_process_chanswitch(sdata,
3290                                                          rx_status->mactime,
3291                                                          &elems, false);
3292                 }
3293                 break;
3294         }
3295         sdata_unlock(sdata);
3296 }
3297
3298 static void ieee80211_sta_timer(unsigned long data)
3299 {
3300         struct ieee80211_sub_if_data *sdata =
3301                 (struct ieee80211_sub_if_data *) data;
3302
3303         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3304 }
3305
3306 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3307                                           u8 *bssid, u8 reason, bool tx)
3308 {
3309         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3310
3311         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3312                                tx, frame_buf);
3313
3314         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3315                               IEEE80211_DEAUTH_FRAME_LEN);
3316 }
3317
3318 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3319 {
3320         struct ieee80211_local *local = sdata->local;
3321         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3322         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3323         u32 tx_flags = 0;
3324
3325         sdata_assert_lock(sdata);
3326
3327         if (WARN_ON_ONCE(!auth_data))
3328                 return -EINVAL;
3329
3330         auth_data->tries++;
3331
3332         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3333                 sdata_info(sdata, "authentication with %pM timed out\n",
3334                            auth_data->bss->bssid);
3335
3336                 /*
3337                  * Most likely AP is not in the range so remove the
3338                  * bss struct for that AP.
3339                  */
3340                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3341
3342                 return -ETIMEDOUT;
3343         }
3344
3345         drv_mgd_prepare_tx(local, sdata);
3346
3347         if (auth_data->bss->proberesp_ies) {
3348                 u16 trans = 1;
3349                 u16 status = 0;
3350
3351                 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3352                            auth_data->bss->bssid, auth_data->tries,
3353                            IEEE80211_AUTH_MAX_TRIES);
3354
3355                 auth_data->expected_transaction = 2;
3356
3357                 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3358                         trans = auth_data->sae_trans;
3359                         status = auth_data->sae_status;
3360                         auth_data->expected_transaction = trans;
3361                 }
3362
3363                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3364                         tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3365                                    IEEE80211_TX_INTFL_MLME_CONN_TX;
3366
3367                 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3368                                     auth_data->data, auth_data->data_len,
3369                                     auth_data->bss->bssid,
3370                                     auth_data->bss->bssid, NULL, 0, 0,
3371                                     tx_flags);
3372         } else {
3373                 const u8 *ssidie;
3374
3375                 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3376                            auth_data->bss->bssid, auth_data->tries,
3377                            IEEE80211_AUTH_MAX_TRIES);
3378
3379                 rcu_read_lock();
3380                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3381                 if (!ssidie) {
3382                         rcu_read_unlock();
3383                         return -EINVAL;
3384                 }
3385                 /*
3386                  * Direct probe is sent to broadcast address as some APs
3387                  * will not answer to direct packet in unassociated state.
3388                  */
3389                 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3390                                          NULL, 0, (u32) -1, true, 0,
3391                                          auth_data->bss->channel, false);
3392                 rcu_read_unlock();
3393         }
3394
3395         if (tx_flags == 0) {
3396                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3397                 ifmgd->auth_data->timeout_started = true;
3398                 run_again(sdata, auth_data->timeout);
3399         } else {
3400                 auth_data->timeout_started = false;
3401         }
3402
3403         return 0;
3404 }
3405
3406 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3407 {
3408         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3409         struct ieee80211_local *local = sdata->local;
3410
3411         sdata_assert_lock(sdata);
3412
3413         assoc_data->tries++;
3414         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3415                 sdata_info(sdata, "association with %pM timed out\n",
3416                            assoc_data->bss->bssid);
3417
3418                 /*
3419                  * Most likely AP is not in the range so remove the
3420                  * bss struct for that AP.
3421                  */
3422                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3423
3424                 return -ETIMEDOUT;
3425         }
3426
3427         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3428                    assoc_data->bss->bssid, assoc_data->tries,
3429                    IEEE80211_ASSOC_MAX_TRIES);
3430         ieee80211_send_assoc(sdata);
3431
3432         if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3433                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3434                 assoc_data->timeout_started = true;
3435                 run_again(sdata, assoc_data->timeout);
3436         } else {
3437                 assoc_data->timeout_started = false;
3438         }
3439
3440         return 0;
3441 }
3442
3443 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3444                                   __le16 fc, bool acked)
3445 {
3446         struct ieee80211_local *local = sdata->local;
3447
3448         sdata->u.mgd.status_fc = fc;
3449         sdata->u.mgd.status_acked = acked;
3450         sdata->u.mgd.status_received = true;
3451
3452         ieee80211_queue_work(&local->hw, &sdata->work);
3453 }
3454
3455 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3456 {
3457         struct ieee80211_local *local = sdata->local;
3458         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3459
3460         sdata_lock(sdata);
3461
3462         if (ifmgd->status_received) {
3463                 __le16 fc = ifmgd->status_fc;
3464                 bool status_acked = ifmgd->status_acked;
3465
3466                 ifmgd->status_received = false;
3467                 if (ifmgd->auth_data &&
3468                     (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3469                         if (status_acked) {
3470                                 ifmgd->auth_data->timeout =
3471                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3472                                 run_again(sdata, ifmgd->auth_data->timeout);
3473                         } else {
3474                                 ifmgd->auth_data->timeout = jiffies - 1;
3475                         }
3476                         ifmgd->auth_data->timeout_started = true;
3477                 } else if (ifmgd->assoc_data &&
3478                            (ieee80211_is_assoc_req(fc) ||
3479                             ieee80211_is_reassoc_req(fc))) {
3480                         if (status_acked) {
3481                                 ifmgd->assoc_data->timeout =
3482                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3483                                 run_again(sdata, ifmgd->assoc_data->timeout);
3484                         } else {
3485                                 ifmgd->assoc_data->timeout = jiffies - 1;
3486                         }
3487                         ifmgd->assoc_data->timeout_started = true;
3488                 }
3489         }
3490
3491         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3492             time_after(jiffies, ifmgd->auth_data->timeout)) {
3493                 if (ifmgd->auth_data->done) {
3494                         /*
3495                          * ok ... we waited for assoc but userspace didn't,
3496                          * so let's just kill the auth data
3497                          */
3498                         ieee80211_destroy_auth_data(sdata, false);
3499                 } else if (ieee80211_probe_auth(sdata)) {
3500                         u8 bssid[ETH_ALEN];
3501
3502                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3503
3504                         ieee80211_destroy_auth_data(sdata, false);
3505
3506                         cfg80211_auth_timeout(sdata->dev, bssid);
3507                 }
3508         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3509                 run_again(sdata, ifmgd->auth_data->timeout);
3510
3511         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3512             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3513                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3514                     ieee80211_do_assoc(sdata)) {
3515                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3516
3517                         ieee80211_destroy_assoc_data(sdata, false);
3518                         cfg80211_assoc_timeout(sdata->dev, bss);
3519                 }
3520         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3521                 run_again(sdata, ifmgd->assoc_data->timeout);
3522
3523         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3524                             IEEE80211_STA_CONNECTION_POLL) &&
3525             ifmgd->associated) {
3526                 u8 bssid[ETH_ALEN];
3527                 int max_tries;
3528
3529                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3530
3531                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3532                         max_tries = max_nullfunc_tries;
3533                 else
3534                         max_tries = max_probe_tries;
3535
3536                 /* ACK received for nullfunc probing frame */
3537                 if (!ifmgd->probe_send_count)
3538                         ieee80211_reset_ap_probe(sdata);
3539                 else if (ifmgd->nullfunc_failed) {
3540                         if (ifmgd->probe_send_count < max_tries) {
3541                                 mlme_dbg(sdata,
3542                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3543                                          bssid, ifmgd->probe_send_count,
3544                                          max_tries);
3545                                 ieee80211_mgd_probe_ap_send(sdata);
3546                         } else {
3547                                 mlme_dbg(sdata,
3548                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3549                                          bssid);
3550                                 ieee80211_sta_connection_lost(sdata, bssid,
3551                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3552                                         false);
3553                         }
3554                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3555                         run_again(sdata, ifmgd->probe_timeout);
3556                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3557                         mlme_dbg(sdata,
3558                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3559                                  bssid, probe_wait_ms);
3560                         ieee80211_sta_connection_lost(sdata, bssid,
3561                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3562                 } else if (ifmgd->probe_send_count < max_tries) {
3563                         mlme_dbg(sdata,
3564                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3565                                  bssid, probe_wait_ms,
3566                                  ifmgd->probe_send_count, max_tries);
3567                         ieee80211_mgd_probe_ap_send(sdata);
3568                 } else {
3569                         /*
3570                          * We actually lost the connection ... or did we?
3571                          * Let's make sure!
3572                          */
3573                         wiphy_debug(local->hw.wiphy,
3574                                     "%s: No probe response from AP %pM"
3575                                     " after %dms, disconnecting.\n",
3576                                     sdata->name,
3577                                     bssid, probe_wait_ms);
3578
3579                         ieee80211_sta_connection_lost(sdata, bssid,
3580                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3581                 }
3582         }
3583
3584         sdata_unlock(sdata);
3585 }
3586
3587 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3588 {
3589         struct ieee80211_sub_if_data *sdata =
3590                 (struct ieee80211_sub_if_data *) data;
3591         struct ieee80211_local *local = sdata->local;
3592
3593         if (local->quiescing)
3594                 return;
3595
3596         sdata->u.mgd.connection_loss = false;
3597         ieee80211_queue_work(&sdata->local->hw,
3598                              &sdata->u.mgd.beacon_connection_loss_work);
3599 }
3600
3601 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3602 {
3603         struct ieee80211_sub_if_data *sdata =
3604                 (struct ieee80211_sub_if_data *) data;
3605         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3606         struct ieee80211_local *local = sdata->local;
3607
3608         if (local->quiescing)
3609                 return;
3610
3611         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3612 }
3613
3614 static void ieee80211_sta_monitor_work(struct work_struct *work)
3615 {
3616         struct ieee80211_sub_if_data *sdata =
3617                 container_of(work, struct ieee80211_sub_if_data,
3618                              u.mgd.monitor_work);
3619
3620         ieee80211_mgd_probe_ap(sdata, false);
3621 }
3622
3623 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3624 {
3625         u32 flags;
3626
3627         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3628                 __ieee80211_stop_poll(sdata);
3629
3630                 /* let's probe the connection once */
3631                 flags = sdata->local->hw.flags;
3632                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3633                         ieee80211_queue_work(&sdata->local->hw,
3634                                              &sdata->u.mgd.monitor_work);
3635                 /* and do all the other regular work too */
3636                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3637         }
3638 }
3639
3640 #ifdef CONFIG_PM
3641 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3642 {
3643         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3644
3645         sdata_lock(sdata);
3646         if (!ifmgd->associated) {
3647                 sdata_unlock(sdata);
3648                 return;
3649         }
3650
3651         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3652                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3653                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3654                 ieee80211_sta_connection_lost(sdata,
3655                                               ifmgd->associated->bssid,
3656                                               WLAN_REASON_UNSPECIFIED,
3657                                               true);
3658                 sdata_unlock(sdata);
3659                 return;
3660         }
3661         sdata_unlock(sdata);
3662 }
3663 #endif
3664
3665 /* interface setup */
3666 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3667 {
3668         struct ieee80211_if_managed *ifmgd;
3669
3670         ifmgd = &sdata->u.mgd;
3671         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3672         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3673         INIT_WORK(&ifmgd->beacon_connection_loss_work,
3674                   ieee80211_beacon_connection_loss_work);
3675         INIT_WORK(&ifmgd->csa_connection_drop_work,
3676                   ieee80211_csa_connection_drop_work);
3677         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3678         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3679                     (unsigned long) sdata);
3680         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3681                     (unsigned long) sdata);
3682         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3683                     (unsigned long) sdata);
3684         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3685                     (unsigned long) sdata);
3686
3687         ifmgd->flags = 0;
3688         ifmgd->powersave = sdata->wdev.ps;
3689         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3690         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3691         ifmgd->p2p_noa_index = -1;
3692
3693         if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3694                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3695         else
3696                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3697 }
3698
3699 /* scan finished notification */
3700 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3701 {
3702         struct ieee80211_sub_if_data *sdata;
3703
3704         /* Restart STA timers */
3705         rcu_read_lock();
3706         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3707                 if (ieee80211_sdata_running(sdata))
3708                         ieee80211_restart_sta_timer(sdata);
3709         }
3710         rcu_read_unlock();
3711 }
3712
3713 int ieee80211_max_network_latency(struct notifier_block *nb,
3714                                   unsigned long data, void *dummy)
3715 {
3716         s32 latency_usec = (s32) data;
3717         struct ieee80211_local *local =
3718                 container_of(nb, struct ieee80211_local,
3719                              network_latency_notifier);
3720
3721         mutex_lock(&local->iflist_mtx);
3722         ieee80211_recalc_ps(local, latency_usec);
3723         mutex_unlock(&local->iflist_mtx);
3724
3725         return 0;
3726 }
3727
3728 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3729                                      struct cfg80211_bss *cbss)
3730 {
3731         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3732         const u8 *ht_cap_ie, *vht_cap_ie;
3733         const struct ieee80211_ht_cap *ht_cap;
3734         const struct ieee80211_vht_cap *vht_cap;
3735         u8 chains = 1;
3736
3737         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3738                 return chains;
3739
3740         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3741         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3742                 ht_cap = (void *)(ht_cap_ie + 2);
3743                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3744                 /*
3745                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3746                  *       "Tx Unequal Modulation Supported" fields.
3747                  */
3748         }
3749
3750         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3751                 return chains;
3752
3753         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3754         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3755                 u8 nss;
3756                 u16 tx_mcs_map;
3757
3758                 vht_cap = (void *)(vht_cap_ie + 2);
3759                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3760                 for (nss = 8; nss > 0; nss--) {
3761                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3762                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
3763                                 break;
3764                 }
3765                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3766                 chains = max(chains, nss);
3767         }
3768
3769         return chains;
3770 }
3771
3772 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3773                                   struct cfg80211_bss *cbss)
3774 {
3775         struct ieee80211_local *local = sdata->local;
3776         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3777         const struct ieee80211_ht_operation *ht_oper = NULL;
3778         const struct ieee80211_vht_operation *vht_oper = NULL;
3779         struct ieee80211_supported_band *sband;
3780         struct cfg80211_chan_def chandef;
3781         int ret;
3782
3783         sband = local->hw.wiphy->bands[cbss->channel->band];
3784
3785         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3786                           IEEE80211_STA_DISABLE_80P80MHZ |
3787                           IEEE80211_STA_DISABLE_160MHZ);
3788
3789         rcu_read_lock();
3790
3791         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3792             sband->ht_cap.ht_supported) {
3793                 const u8 *ht_oper_ie, *ht_cap;
3794
3795                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3796                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3797                         ht_oper = (void *)(ht_oper_ie + 2);
3798
3799                 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3800                 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3801                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3802                         ht_oper = NULL;
3803                 }
3804         }
3805
3806         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3807             sband->vht_cap.vht_supported) {
3808                 const u8 *vht_oper_ie, *vht_cap;
3809
3810                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3811                                                    WLAN_EID_VHT_OPERATION);
3812                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3813                         vht_oper = (void *)(vht_oper_ie + 2);
3814                 if (vht_oper && !ht_oper) {
3815                         vht_oper = NULL;
3816                         sdata_info(sdata,
3817                                    "AP advertised VHT without HT, disabling both\n");
3818                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3819                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3820                 }
3821
3822                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3823                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3824                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3825                         vht_oper = NULL;
3826                 }
3827         }
3828
3829         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3830                                                      cbss->channel,
3831                                                      ht_oper, vht_oper,
3832                                                      &chandef, true);
3833
3834         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3835                                       local->rx_chains);
3836
3837         rcu_read_unlock();
3838
3839         /* will change later if needed */
3840         sdata->smps_mode = IEEE80211_SMPS_OFF;
3841
3842         /*
3843          * If this fails (possibly due to channel context sharing
3844          * on incompatible channels, e.g. 80+80 and 160 sharing the
3845          * same control channel) try to use a smaller bandwidth.
3846          */
3847         ret = ieee80211_vif_use_channel(sdata, &chandef,
3848                                         IEEE80211_CHANCTX_SHARED);
3849
3850         /* don't downgrade for 5 and 10 MHz channels, though. */
3851         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3852             chandef.width == NL80211_CHAN_WIDTH_10)
3853                 return ret;
3854
3855         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3856                 ifmgd->flags |= chandef_downgrade(&chandef);
3857                 ret = ieee80211_vif_use_channel(sdata, &chandef,
3858                                                 IEEE80211_CHANCTX_SHARED);
3859         }
3860         return ret;
3861 }
3862
3863 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3864                                      struct cfg80211_bss *cbss, bool assoc)
3865 {
3866         struct ieee80211_local *local = sdata->local;
3867         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3868         struct ieee80211_bss *bss = (void *)cbss->priv;
3869         struct sta_info *new_sta = NULL;
3870         bool have_sta = false;
3871         int err;
3872
3873         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3874                 return -EINVAL;
3875
3876         if (assoc) {
3877                 rcu_read_lock();
3878                 have_sta = sta_info_get(sdata, cbss->bssid);
3879                 rcu_read_unlock();
3880         }
3881
3882         if (!have_sta) {
3883                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3884                 if (!new_sta)
3885                         return -ENOMEM;
3886         }
3887
3888         if (new_sta) {
3889                 u32 rates = 0, basic_rates = 0;
3890                 bool have_higher_than_11mbit;
3891                 int min_rate = INT_MAX, min_rate_index = -1;
3892                 struct ieee80211_supported_band *sband;
3893                 const struct cfg80211_bss_ies *ies;
3894
3895                 sband = local->hw.wiphy->bands[cbss->channel->band];
3896
3897                 err = ieee80211_prep_channel(sdata, cbss);
3898                 if (err) {
3899                         sta_info_free(local, new_sta);
3900                         return err;
3901                 }
3902
3903                 ieee80211_get_rates(sband, bss->supp_rates,
3904                                     bss->supp_rates_len,
3905                                     &rates, &basic_rates,
3906                                     &have_higher_than_11mbit,
3907                                     &min_rate, &min_rate_index);
3908
3909                 /*
3910                  * This used to be a workaround for basic rates missing
3911                  * in the association response frame. Now that we no
3912                  * longer use the basic rates from there, it probably
3913                  * doesn't happen any more, but keep the workaround so
3914                  * in case some *other* APs are buggy in different ways
3915                  * we can connect -- with a warning.
3916                  */
3917                 if (!basic_rates && min_rate_index >= 0) {
3918                         sdata_info(sdata,
3919                                    "No basic rates, using min rate instead\n");
3920                         basic_rates = BIT(min_rate_index);
3921                 }
3922
3923                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3924                 sdata->vif.bss_conf.basic_rates = basic_rates;
3925
3926                 /* cf. IEEE 802.11 9.2.12 */
3927                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3928                     have_higher_than_11mbit)
3929                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3930                 else
3931                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3932
3933                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3934
3935                 /* set timing information */
3936                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3937                 rcu_read_lock();
3938                 ies = rcu_dereference(cbss->beacon_ies);
3939                 if (ies) {
3940                         const u8 *tim_ie;
3941
3942                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3943                         sdata->vif.bss_conf.sync_device_ts =
3944                                 bss->device_ts_beacon;
3945                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3946                                                   ies->data, ies->len);
3947                         if (tim_ie && tim_ie[1] >= 2)
3948                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3949                         else
3950                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3951                 } else if (!(local->hw.flags &
3952                                         IEEE80211_HW_TIMING_BEACON_ONLY)) {
3953                         ies = rcu_dereference(cbss->proberesp_ies);
3954                         /* must be non-NULL since beacon IEs were NULL */
3955                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3956                         sdata->vif.bss_conf.sync_device_ts =
3957                                 bss->device_ts_presp;
3958                         sdata->vif.bss_conf.sync_dtim_count = 0;
3959                 } else {
3960                         sdata->vif.bss_conf.sync_tsf = 0;
3961                         sdata->vif.bss_conf.sync_device_ts = 0;
3962                         sdata->vif.bss_conf.sync_dtim_count = 0;
3963                 }
3964                 rcu_read_unlock();
3965
3966                 /* tell driver about BSSID, basic rates and timing */
3967                 ieee80211_bss_info_change_notify(sdata,
3968                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3969                         BSS_CHANGED_BEACON_INT);
3970
3971                 if (assoc)
3972                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3973
3974                 err = sta_info_insert(new_sta);
3975                 new_sta = NULL;
3976                 if (err) {
3977                         sdata_info(sdata,
3978                                    "failed to insert STA entry for the AP (error %d)\n",
3979                                    err);
3980                         return err;
3981                 }
3982         } else
3983                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3984
3985         return 0;
3986 }
3987
3988 /* config hooks */
3989 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3990                        struct cfg80211_auth_request *req)
3991 {
3992         struct ieee80211_local *local = sdata->local;
3993         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3994         struct ieee80211_mgd_auth_data *auth_data;
3995         u16 auth_alg;
3996         int err;
3997
3998         /* prepare auth data structure */
3999
4000         switch (req->auth_type) {
4001         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4002                 auth_alg = WLAN_AUTH_OPEN;
4003                 break;
4004         case NL80211_AUTHTYPE_SHARED_KEY:
4005                 if (IS_ERR(local->wep_tx_tfm))
4006                         return -EOPNOTSUPP;
4007                 auth_alg = WLAN_AUTH_SHARED_KEY;
4008                 break;
4009         case NL80211_AUTHTYPE_FT:
4010                 auth_alg = WLAN_AUTH_FT;
4011                 break;
4012         case NL80211_AUTHTYPE_NETWORK_EAP:
4013                 auth_alg = WLAN_AUTH_LEAP;
4014                 break;
4015         case NL80211_AUTHTYPE_SAE:
4016                 auth_alg = WLAN_AUTH_SAE;
4017                 break;
4018         default:
4019                 return -EOPNOTSUPP;
4020         }
4021
4022         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4023                             req->ie_len, GFP_KERNEL);
4024         if (!auth_data)
4025                 return -ENOMEM;
4026
4027         auth_data->bss = req->bss;
4028
4029         if (req->sae_data_len >= 4) {
4030                 __le16 *pos = (__le16 *) req->sae_data;
4031                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4032                 auth_data->sae_status = le16_to_cpu(pos[1]);
4033                 memcpy(auth_data->data, req->sae_data + 4,
4034                        req->sae_data_len - 4);
4035                 auth_data->data_len += req->sae_data_len - 4;
4036         }
4037
4038         if (req->ie && req->ie_len) {
4039                 memcpy(&auth_data->data[auth_data->data_len],
4040                        req->ie, req->ie_len);
4041                 auth_data->data_len += req->ie_len;
4042         }
4043
4044         if (req->key && req->key_len) {
4045                 auth_data->key_len = req->key_len;
4046                 auth_data->key_idx = req->key_idx;
4047                 memcpy(auth_data->key, req->key, req->key_len);
4048         }
4049
4050         auth_data->algorithm = auth_alg;
4051
4052         /* try to authenticate/probe */
4053
4054         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4055             ifmgd->assoc_data) {
4056                 err = -EBUSY;
4057                 goto err_free;
4058         }
4059
4060         if (ifmgd->auth_data)
4061                 ieee80211_destroy_auth_data(sdata, false);
4062
4063         /* prep auth_data so we don't go into idle on disassoc */
4064         ifmgd->auth_data = auth_data;
4065
4066         if (ifmgd->associated) {
4067                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4068
4069                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4070                                        WLAN_REASON_UNSPECIFIED,
4071                                        false, frame_buf);
4072
4073                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4074                                       sizeof(frame_buf));
4075         }
4076
4077         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4078
4079         err = ieee80211_prep_connection(sdata, req->bss, false);
4080         if (err)
4081                 goto err_clear;
4082
4083         err = ieee80211_probe_auth(sdata);
4084         if (err) {
4085                 sta_info_destroy_addr(sdata, req->bss->bssid);
4086                 goto err_clear;
4087         }
4088
4089         /* hold our own reference */
4090         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4091         return 0;
4092
4093  err_clear:
4094         memset(ifmgd->bssid, 0, ETH_ALEN);
4095         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4096         ifmgd->auth_data = NULL;
4097  err_free:
4098         kfree(auth_data);
4099         return err;
4100 }
4101
4102 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4103                         struct cfg80211_assoc_request *req)
4104 {
4105         struct ieee80211_local *local = sdata->local;
4106         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4107         struct ieee80211_bss *bss = (void *)req->bss->priv;
4108         struct ieee80211_mgd_assoc_data *assoc_data;
4109         const struct cfg80211_bss_ies *beacon_ies;
4110         struct ieee80211_supported_band *sband;
4111         const u8 *ssidie, *ht_ie, *vht_ie;
4112         int i, err;
4113
4114         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4115         if (!assoc_data)
4116                 return -ENOMEM;
4117
4118         rcu_read_lock();
4119         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4120         if (!ssidie) {
4121                 rcu_read_unlock();
4122                 kfree(assoc_data);
4123                 return -EINVAL;
4124         }
4125         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4126         assoc_data->ssid_len = ssidie[1];
4127         rcu_read_unlock();
4128
4129         if (ifmgd->associated) {
4130                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4131
4132                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4133                                        WLAN_REASON_UNSPECIFIED,
4134                                        false, frame_buf);
4135
4136                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4137                                       sizeof(frame_buf));
4138         }
4139
4140         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4141                 err = -EBUSY;
4142                 goto err_free;
4143         }
4144
4145         if (ifmgd->assoc_data) {
4146                 err = -EBUSY;
4147                 goto err_free;
4148         }
4149
4150         if (ifmgd->auth_data) {
4151                 bool match;
4152
4153                 /* keep sta info, bssid if matching */
4154                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4155                 ieee80211_destroy_auth_data(sdata, match);
4156         }
4157
4158         /* prepare assoc data */
4159
4160         ifmgd->beacon_crc_valid = false;
4161
4162         /*
4163          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4164          * We still associate in non-HT mode (11a/b/g) if any one of these
4165          * ciphers is configured as pairwise.
4166          * We can set this to true for non-11n hardware, that'll be checked
4167          * separately along with the peer capabilities.
4168          */
4169         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4170                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4171                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4172                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4173                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4174                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4175                         netdev_info(sdata->dev,
4176                                     "disabling HT/VHT due to WEP/TKIP use\n");
4177                 }
4178         }
4179
4180         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4181                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4182                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4183         }
4184
4185         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4186                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4187
4188         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4189         sband = local->hw.wiphy->bands[req->bss->channel->band];
4190         if (!sband->ht_cap.ht_supported ||
4191             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4192                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4193                 if (!bss->wmm_used)
4194                         netdev_info(sdata->dev,
4195                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4196         }
4197
4198         /* disable VHT if we don't support it or the AP doesn't use WMM */
4199         if (!sband->vht_cap.vht_supported ||
4200             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4201                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4202                 if (!bss->wmm_used)
4203                         netdev_info(sdata->dev,
4204                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4205         }
4206
4207         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4208         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4209                sizeof(ifmgd->ht_capa_mask));
4210
4211         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4212         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4213                sizeof(ifmgd->vht_capa_mask));
4214
4215         if (req->ie && req->ie_len) {
4216                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4217                 assoc_data->ie_len = req->ie_len;
4218         }
4219
4220         assoc_data->bss = req->bss;
4221
4222         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4223                 if (ifmgd->powersave)
4224                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4225                 else
4226                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4227         } else
4228                 sdata->smps_mode = ifmgd->req_smps;
4229
4230         assoc_data->capability = req->bss->capability;
4231         assoc_data->wmm = bss->wmm_used &&
4232                           (local->hw.queues >= IEEE80211_NUM_ACS);
4233         assoc_data->supp_rates = bss->supp_rates;
4234         assoc_data->supp_rates_len = bss->supp_rates_len;
4235
4236         rcu_read_lock();
4237         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4238         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4239                 assoc_data->ap_ht_param =
4240                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4241         else
4242                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4243         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4244         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4245                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4246                        sizeof(struct ieee80211_vht_cap));
4247         else
4248                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4249         rcu_read_unlock();
4250
4251         if (bss->wmm_used && bss->uapsd_supported &&
4252             (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4253             sdata->wmm_acm != 0xff) {
4254                 assoc_data->uapsd = true;
4255                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4256         } else {
4257                 assoc_data->uapsd = false;
4258                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4259         }
4260
4261         if (req->prev_bssid)
4262                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4263
4264         if (req->use_mfp) {
4265                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4266                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4267         } else {
4268                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4269                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4270         }
4271
4272         if (req->crypto.control_port)
4273                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4274         else
4275                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4276
4277         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4278         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4279
4280         /* kick off associate process */
4281
4282         ifmgd->assoc_data = assoc_data;
4283         ifmgd->dtim_period = 0;
4284         ifmgd->have_beacon = false;
4285
4286         err = ieee80211_prep_connection(sdata, req->bss, true);
4287         if (err)
4288                 goto err_clear;
4289
4290         rcu_read_lock();
4291         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4292
4293         if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4294             !beacon_ies) {
4295                 /*
4296                  * Wait up to one beacon interval ...
4297                  * should this be more if we miss one?
4298                  */
4299                 sdata_info(sdata, "waiting for beacon from %pM\n",
4300                            ifmgd->bssid);
4301                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4302                 assoc_data->timeout_started = true;
4303                 assoc_data->need_beacon = true;
4304         } else if (beacon_ies) {
4305                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4306                                                     beacon_ies->data,
4307                                                     beacon_ies->len);
4308                 u8 dtim_count = 0;
4309
4310                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4311                         const struct ieee80211_tim_ie *tim;
4312                         tim = (void *)(tim_ie + 2);
4313                         ifmgd->dtim_period = tim->dtim_period;
4314                         dtim_count = tim->dtim_count;
4315                 }
4316                 ifmgd->have_beacon = true;
4317                 assoc_data->timeout = jiffies;
4318                 assoc_data->timeout_started = true;
4319
4320                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4321                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4322                         sdata->vif.bss_conf.sync_device_ts =
4323                                 bss->device_ts_beacon;
4324                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4325                 }
4326         } else {
4327                 assoc_data->timeout = jiffies;
4328                 assoc_data->timeout_started = true;
4329         }
4330         rcu_read_unlock();
4331
4332         run_again(sdata, assoc_data->timeout);
4333
4334         if (bss->corrupt_data) {
4335                 char *corrupt_type = "data";
4336                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4337                         if (bss->corrupt_data &
4338                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4339                                 corrupt_type = "beacon and probe response";
4340                         else
4341                                 corrupt_type = "beacon";
4342                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4343                         corrupt_type = "probe response";
4344                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4345                            corrupt_type);
4346         }
4347
4348         return 0;
4349  err_clear:
4350         memset(ifmgd->bssid, 0, ETH_ALEN);
4351         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4352         ifmgd->assoc_data = NULL;
4353  err_free:
4354         kfree(assoc_data);
4355         return err;
4356 }
4357
4358 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4359                          struct cfg80211_deauth_request *req)
4360 {
4361         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4362         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4363         bool tx = !req->local_state_change;
4364         bool report_frame = false;
4365
4366         sdata_info(sdata,
4367                    "deauthenticating from %pM by local choice (reason=%d)\n",
4368                    req->bssid, req->reason_code);
4369
4370         if (ifmgd->auth_data) {
4371                 drv_mgd_prepare_tx(sdata->local, sdata);
4372                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4373                                                IEEE80211_STYPE_DEAUTH,
4374                                                req->reason_code, tx,
4375                                                frame_buf);
4376                 ieee80211_destroy_auth_data(sdata, false);
4377
4378                 report_frame = true;
4379                 goto out;
4380         }
4381
4382         if (ifmgd->associated &&
4383             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4384                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4385                                        req->reason_code, tx, frame_buf);
4386                 report_frame = true;
4387         }
4388
4389  out:
4390         if (report_frame)
4391                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4392                                       IEEE80211_DEAUTH_FRAME_LEN);
4393
4394         return 0;
4395 }
4396
4397 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4398                            struct cfg80211_disassoc_request *req)
4399 {
4400         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4401         u8 bssid[ETH_ALEN];
4402         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4403
4404         /*
4405          * cfg80211 should catch this ... but it's racy since
4406          * we can receive a disassoc frame, process it, hand it
4407          * to cfg80211 while that's in a locked section already
4408          * trying to tell us that the user wants to disconnect.
4409          */
4410         if (ifmgd->associated != req->bss)
4411                 return -ENOLINK;
4412
4413         sdata_info(sdata,
4414                    "disassociating from %pM by local choice (reason=%d)\n",
4415                    req->bss->bssid, req->reason_code);
4416
4417         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4418         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4419                                req->reason_code, !req->local_state_change,
4420                                frame_buf);
4421
4422         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4423                               IEEE80211_DEAUTH_FRAME_LEN);
4424
4425         return 0;
4426 }
4427
4428 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4429 {
4430         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4431
4432         /*
4433          * Make sure some work items will not run after this,
4434          * they will not do anything but might not have been
4435          * cancelled when disconnecting.
4436          */
4437         cancel_work_sync(&ifmgd->monitor_work);
4438         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4439         cancel_work_sync(&ifmgd->request_smps_work);
4440         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4441         cancel_work_sync(&ifmgd->chswitch_work);
4442
4443         sdata_lock(sdata);
4444         if (ifmgd->assoc_data) {
4445                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4446                 ieee80211_destroy_assoc_data(sdata, false);
4447                 cfg80211_assoc_timeout(sdata->dev, bss);
4448         }
4449         if (ifmgd->auth_data)
4450                 ieee80211_destroy_auth_data(sdata, false);
4451         del_timer_sync(&ifmgd->timer);
4452         sdata_unlock(sdata);
4453 }
4454
4455 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4456                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4457                                gfp_t gfp)
4458 {
4459         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4460
4461         trace_api_cqm_rssi_notify(sdata, rssi_event);
4462
4463         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4464 }
4465 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);