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_put_bss(sdata->local->hw.wiphy, bss);
2799                         cfg80211_assoc_timeout(sdata->dev, mgmt->bssid);
2800                         return;
2801                 }
2802                 sdata_info(sdata, "associated\n");
2803
2804                 /*
2805                  * destroy assoc_data afterwards, as otherwise an idle
2806                  * recalc after assoc_data is NULL but before associated
2807                  * is set can cause the interface to go idle
2808                  */
2809                 ieee80211_destroy_assoc_data(sdata, true);
2810         }
2811
2812         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2813 }
2814
2815 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2816                                   struct ieee80211_mgmt *mgmt, size_t len,
2817                                   struct ieee80211_rx_status *rx_status,
2818                                   struct ieee802_11_elems *elems)
2819 {
2820         struct ieee80211_local *local = sdata->local;
2821         int freq;
2822         struct ieee80211_bss *bss;
2823         struct ieee80211_channel *channel;
2824
2825         sdata_assert_lock(sdata);
2826
2827         if (elems->ds_params)
2828                 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2829                                                       rx_status->band);
2830         else
2831                 freq = rx_status->freq;
2832
2833         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2834
2835         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2836                 return;
2837
2838         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2839                                         channel);
2840         if (bss) {
2841                 ieee80211_rx_bss_put(local, bss);
2842                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2843         }
2844
2845         if (!sdata->u.mgd.associated ||
2846             !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
2847                 return;
2848
2849         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2850                                          elems, true);
2851
2852 }
2853
2854
2855 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2856                                          struct sk_buff *skb)
2857 {
2858         struct ieee80211_mgmt *mgmt = (void *)skb->data;
2859         struct ieee80211_if_managed *ifmgd;
2860         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2861         size_t baselen, len = skb->len;
2862         struct ieee802_11_elems elems;
2863
2864         ifmgd = &sdata->u.mgd;
2865
2866         sdata_assert_lock(sdata);
2867
2868         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2869                 return; /* ignore ProbeResp to foreign address */
2870
2871         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2872         if (baselen > len)
2873                 return;
2874
2875         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2876                                false, &elems);
2877
2878         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2879
2880         if (ifmgd->associated &&
2881             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2882                 ieee80211_reset_ap_probe(sdata);
2883
2884         if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2885             ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2886                 /* got probe response, continue with auth */
2887                 sdata_info(sdata, "direct probe responded\n");
2888                 ifmgd->auth_data->tries = 0;
2889                 ifmgd->auth_data->timeout = jiffies;
2890                 ifmgd->auth_data->timeout_started = true;
2891                 run_again(sdata, ifmgd->auth_data->timeout);
2892         }
2893 }
2894
2895 /*
2896  * This is the canonical list of information elements we care about,
2897  * the filter code also gives us all changes to the Microsoft OUI
2898  * (00:50:F2) vendor IE which is used for WMM which we need to track.
2899  *
2900  * We implement beacon filtering in software since that means we can
2901  * avoid processing the frame here and in cfg80211, and userspace
2902  * will not be able to tell whether the hardware supports it or not.
2903  *
2904  * XXX: This list needs to be dynamic -- userspace needs to be able to
2905  *      add items it requires. It also needs to be able to tell us to
2906  *      look out for other vendor IEs.
2907  */
2908 static const u64 care_about_ies =
2909         (1ULL << WLAN_EID_COUNTRY) |
2910         (1ULL << WLAN_EID_ERP_INFO) |
2911         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2912         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2913         (1ULL << WLAN_EID_HT_CAPABILITY) |
2914         (1ULL << WLAN_EID_HT_OPERATION);
2915
2916 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2917                                      struct ieee80211_mgmt *mgmt, size_t len,
2918                                      struct ieee80211_rx_status *rx_status)
2919 {
2920         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2921         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2922         size_t baselen;
2923         struct ieee802_11_elems elems;
2924         struct ieee80211_local *local = sdata->local;
2925         struct ieee80211_chanctx_conf *chanctx_conf;
2926         struct ieee80211_channel *chan;
2927         struct sta_info *sta;
2928         u32 changed = 0;
2929         bool erp_valid;
2930         u8 erp_value = 0;
2931         u32 ncrc;
2932         u8 *bssid;
2933         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2934
2935         sdata_assert_lock(sdata);
2936
2937         /* Process beacon from the current BSS */
2938         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2939         if (baselen > len)
2940                 return;
2941
2942         rcu_read_lock();
2943         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2944         if (!chanctx_conf) {
2945                 rcu_read_unlock();
2946                 return;
2947         }
2948
2949         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2950                 rcu_read_unlock();
2951                 return;
2952         }
2953         chan = chanctx_conf->def.chan;
2954         rcu_read_unlock();
2955
2956         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2957             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2958                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2959                                        len - baselen, false, &elems);
2960
2961                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2962                 if (elems.tim && !elems.parse_error) {
2963                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
2964                         ifmgd->dtim_period = tim_ie->dtim_period;
2965                 }
2966                 ifmgd->have_beacon = true;
2967                 ifmgd->assoc_data->need_beacon = false;
2968                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2969                         sdata->vif.bss_conf.sync_tsf =
2970                                 le64_to_cpu(mgmt->u.beacon.timestamp);
2971                         sdata->vif.bss_conf.sync_device_ts =
2972                                 rx_status->device_timestamp;
2973                         if (elems.tim)
2974                                 sdata->vif.bss_conf.sync_dtim_count =
2975                                         elems.tim->dtim_count;
2976                         else
2977                                 sdata->vif.bss_conf.sync_dtim_count = 0;
2978                 }
2979                 /* continue assoc process */
2980                 ifmgd->assoc_data->timeout = jiffies;
2981                 ifmgd->assoc_data->timeout_started = true;
2982                 run_again(sdata, ifmgd->assoc_data->timeout);
2983                 return;
2984         }
2985
2986         if (!ifmgd->associated ||
2987             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2988                 return;
2989         bssid = ifmgd->associated->bssid;
2990
2991         /* Track average RSSI from the Beacon frames of the current AP */
2992         ifmgd->last_beacon_signal = rx_status->signal;
2993         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2994                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2995                 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2996                 ifmgd->last_cqm_event_signal = 0;
2997                 ifmgd->count_beacon_signal = 1;
2998                 ifmgd->last_ave_beacon_signal = 0;
2999         } else {
3000                 ifmgd->ave_beacon_signal =
3001                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3002                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3003                          ifmgd->ave_beacon_signal) / 16;
3004                 ifmgd->count_beacon_signal++;
3005         }
3006
3007         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3008             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3009                 int sig = ifmgd->ave_beacon_signal;
3010                 int last_sig = ifmgd->last_ave_beacon_signal;
3011
3012                 /*
3013                  * if signal crosses either of the boundaries, invoke callback
3014                  * with appropriate parameters
3015                  */
3016                 if (sig > ifmgd->rssi_max_thold &&
3017                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3018                         ifmgd->last_ave_beacon_signal = sig;
3019                         drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3020                 } else if (sig < ifmgd->rssi_min_thold &&
3021                            (last_sig >= ifmgd->rssi_max_thold ||
3022                            last_sig == 0)) {
3023                         ifmgd->last_ave_beacon_signal = sig;
3024                         drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3025                 }
3026         }
3027
3028         if (bss_conf->cqm_rssi_thold &&
3029             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3030             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3031                 int sig = ifmgd->ave_beacon_signal / 16;
3032                 int last_event = ifmgd->last_cqm_event_signal;
3033                 int thold = bss_conf->cqm_rssi_thold;
3034                 int hyst = bss_conf->cqm_rssi_hyst;
3035                 if (sig < thold &&
3036                     (last_event == 0 || sig < last_event - hyst)) {
3037                         ifmgd->last_cqm_event_signal = sig;
3038                         ieee80211_cqm_rssi_notify(
3039                                 &sdata->vif,
3040                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3041                                 GFP_KERNEL);
3042                 } else if (sig > thold &&
3043                            (last_event == 0 || sig > last_event + hyst)) {
3044                         ifmgd->last_cqm_event_signal = sig;
3045                         ieee80211_cqm_rssi_notify(
3046                                 &sdata->vif,
3047                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3048                                 GFP_KERNEL);
3049                 }
3050         }
3051
3052         if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
3053                 mlme_dbg_ratelimited(sdata,
3054                                      "cancelling AP probe due to a received beacon\n");
3055                 mutex_lock(&local->mtx);
3056                 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
3057                 ieee80211_run_deferred_scan(local);
3058                 mutex_unlock(&local->mtx);
3059
3060                 mutex_lock(&local->iflist_mtx);
3061                 ieee80211_recalc_ps(local, -1);
3062                 mutex_unlock(&local->iflist_mtx);
3063         }
3064
3065         /*
3066          * Push the beacon loss detection into the future since
3067          * we are processing a beacon from the AP just now.
3068          */
3069         ieee80211_sta_reset_beacon_monitor(sdata);
3070
3071         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3072         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3073                                           len - baselen, false, &elems,
3074                                           care_about_ies, ncrc);
3075
3076         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3077                 bool directed_tim = ieee80211_check_tim(elems.tim,
3078                                                         elems.tim_len,
3079                                                         ifmgd->aid);
3080                 if (directed_tim) {
3081                         if (local->hw.conf.dynamic_ps_timeout > 0) {
3082                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3083                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3084                                         ieee80211_hw_config(local,
3085                                                             IEEE80211_CONF_CHANGE_PS);
3086                                 }
3087                                 ieee80211_send_nullfunc(local, sdata, 0);
3088                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
3089                                 local->pspolling = true;
3090
3091                                 /*
3092                                  * Here is assumed that the driver will be
3093                                  * able to send ps-poll frame and receive a
3094                                  * response even though power save mode is
3095                                  * enabled, but some drivers might require
3096                                  * to disable power save here. This needs
3097                                  * to be investigated.
3098                                  */
3099                                 ieee80211_send_pspoll(local, sdata);
3100                         }
3101                 }
3102         }
3103
3104         if (sdata->vif.p2p) {
3105                 struct ieee80211_p2p_noa_attr noa = {};
3106                 int ret;
3107
3108                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3109                                             len - baselen,
3110                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3111                                             (u8 *) &noa, sizeof(noa));
3112                 if (ret >= 2) {
3113                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3114                                 /* valid noa_attr and index changed */
3115                                 sdata->u.mgd.p2p_noa_index = noa.index;
3116                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3117                                 changed |= BSS_CHANGED_P2P_PS;
3118                                 /*
3119                                  * make sure we update all information, the CRC
3120                                  * mechanism doesn't look at P2P attributes.
3121                                  */
3122                                 ifmgd->beacon_crc_valid = false;
3123                         }
3124                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3125                         /* noa_attr not found and we had valid noa_attr before */
3126                         sdata->u.mgd.p2p_noa_index = -1;
3127                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3128                         changed |= BSS_CHANGED_P2P_PS;
3129                         ifmgd->beacon_crc_valid = false;
3130                 }
3131         }
3132
3133         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3134                 return;
3135         ifmgd->beacon_crc = ncrc;
3136         ifmgd->beacon_crc_valid = true;
3137
3138         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3139
3140         if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3141                                      elems.wmm_param_len))
3142                 changed |= BSS_CHANGED_QOS;
3143
3144         /*
3145          * If we haven't had a beacon before, tell the driver about the
3146          * DTIM period (and beacon timing if desired) now.
3147          */
3148         if (!ifmgd->have_beacon) {
3149                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3150                 if (elems.tim)
3151                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3152                 else
3153                         bss_conf->dtim_period = 1;
3154
3155                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3156                         sdata->vif.bss_conf.sync_tsf =
3157                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3158                         sdata->vif.bss_conf.sync_device_ts =
3159                                 rx_status->device_timestamp;
3160                         if (elems.tim)
3161                                 sdata->vif.bss_conf.sync_dtim_count =
3162                                         elems.tim->dtim_count;
3163                         else
3164                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3165                 }
3166
3167                 changed |= BSS_CHANGED_BEACON_INFO;
3168                 ifmgd->have_beacon = true;
3169
3170                 mutex_lock(&local->iflist_mtx);
3171                 ieee80211_recalc_ps(local, -1);
3172                 mutex_unlock(&local->iflist_mtx);
3173
3174                 ieee80211_recalc_ps_vif(sdata);
3175         }
3176
3177         if (elems.erp_info) {
3178                 erp_valid = true;
3179                 erp_value = elems.erp_info[0];
3180         } else {
3181                 erp_valid = false;
3182         }
3183         changed |= ieee80211_handle_bss_capability(sdata,
3184                         le16_to_cpu(mgmt->u.beacon.capab_info),
3185                         erp_valid, erp_value);
3186
3187         mutex_lock(&local->sta_mtx);
3188         sta = sta_info_get(sdata, bssid);
3189
3190         if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3191                                 elems.vht_operation, bssid, &changed)) {
3192                 mutex_unlock(&local->sta_mtx);
3193                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3194                                        WLAN_REASON_DEAUTH_LEAVING,
3195                                        true, deauth_buf);
3196                 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3197                                       sizeof(deauth_buf));
3198                 return;
3199         }
3200
3201         if (sta && elems.opmode_notif)
3202                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3203                                             rx_status->band, true);
3204         mutex_unlock(&local->sta_mtx);
3205
3206         if (elems.country_elem && elems.pwr_constr_elem &&
3207             mgmt->u.probe_resp.capab_info &
3208                                 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3209                 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3210                                                        elems.country_elem,
3211                                                        elems.country_elem_len,
3212                                                        elems.pwr_constr_elem);
3213
3214         ieee80211_bss_info_change_notify(sdata, changed);
3215 }
3216
3217 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3218                                   struct sk_buff *skb)
3219 {
3220         struct ieee80211_rx_status *rx_status;
3221         struct ieee80211_mgmt *mgmt;
3222         u16 fc;
3223         struct ieee802_11_elems elems;
3224         int ies_len;
3225
3226         rx_status = (struct ieee80211_rx_status *) skb->cb;
3227         mgmt = (struct ieee80211_mgmt *) skb->data;
3228         fc = le16_to_cpu(mgmt->frame_control);
3229
3230         sdata_lock(sdata);
3231
3232         switch (fc & IEEE80211_FCTL_STYPE) {
3233         case IEEE80211_STYPE_BEACON:
3234                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3235                 break;
3236         case IEEE80211_STYPE_PROBE_RESP:
3237                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3238                 break;
3239         case IEEE80211_STYPE_AUTH:
3240                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3241                 break;
3242         case IEEE80211_STYPE_DEAUTH:
3243                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3244                 break;
3245         case IEEE80211_STYPE_DISASSOC:
3246                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3247                 break;
3248         case IEEE80211_STYPE_ASSOC_RESP:
3249         case IEEE80211_STYPE_REASSOC_RESP:
3250                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3251                 break;
3252         case IEEE80211_STYPE_ACTION:
3253                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3254                         ies_len = skb->len -
3255                                   offsetof(struct ieee80211_mgmt,
3256                                            u.action.u.chan_switch.variable);
3257
3258                         if (ies_len < 0)
3259                                 break;
3260
3261                         ieee802_11_parse_elems(
3262                                 mgmt->u.action.u.chan_switch.variable,
3263                                 ies_len, true, &elems);
3264
3265                         if (elems.parse_error)
3266                                 break;
3267
3268                         ieee80211_sta_process_chanswitch(sdata,
3269                                                          rx_status->mactime,
3270                                                          &elems, false);
3271                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3272                         ies_len = skb->len -
3273                                   offsetof(struct ieee80211_mgmt,
3274                                            u.action.u.ext_chan_switch.variable);
3275
3276                         if (ies_len < 0)
3277                                 break;
3278
3279                         ieee802_11_parse_elems(
3280                                 mgmt->u.action.u.ext_chan_switch.variable,
3281                                 ies_len, true, &elems);
3282
3283                         if (elems.parse_error)
3284                                 break;
3285
3286                         /* for the handling code pretend this was also an IE */
3287                         elems.ext_chansw_ie =
3288                                 &mgmt->u.action.u.ext_chan_switch.data;
3289
3290                         ieee80211_sta_process_chanswitch(sdata,
3291                                                          rx_status->mactime,
3292                                                          &elems, false);
3293                 }
3294                 break;
3295         }
3296         sdata_unlock(sdata);
3297 }
3298
3299 static void ieee80211_sta_timer(unsigned long data)
3300 {
3301         struct ieee80211_sub_if_data *sdata =
3302                 (struct ieee80211_sub_if_data *) data;
3303
3304         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3305 }
3306
3307 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3308                                           u8 *bssid, u8 reason, bool tx)
3309 {
3310         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3311
3312         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3313                                tx, frame_buf);
3314
3315         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3316                               IEEE80211_DEAUTH_FRAME_LEN);
3317 }
3318
3319 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3320 {
3321         struct ieee80211_local *local = sdata->local;
3322         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3323         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3324         u32 tx_flags = 0;
3325
3326         sdata_assert_lock(sdata);
3327
3328         if (WARN_ON_ONCE(!auth_data))
3329                 return -EINVAL;
3330
3331         auth_data->tries++;
3332
3333         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3334                 sdata_info(sdata, "authentication with %pM timed out\n",
3335                            auth_data->bss->bssid);
3336
3337                 /*
3338                  * Most likely AP is not in the range so remove the
3339                  * bss struct for that AP.
3340                  */
3341                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3342
3343                 return -ETIMEDOUT;
3344         }
3345
3346         drv_mgd_prepare_tx(local, sdata);
3347
3348         if (auth_data->bss->proberesp_ies) {
3349                 u16 trans = 1;
3350                 u16 status = 0;
3351
3352                 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3353                            auth_data->bss->bssid, auth_data->tries,
3354                            IEEE80211_AUTH_MAX_TRIES);
3355
3356                 auth_data->expected_transaction = 2;
3357
3358                 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3359                         trans = auth_data->sae_trans;
3360                         status = auth_data->sae_status;
3361                         auth_data->expected_transaction = trans;
3362                 }
3363
3364                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3365                         tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3366                                    IEEE80211_TX_INTFL_MLME_CONN_TX;
3367
3368                 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3369                                     auth_data->data, auth_data->data_len,
3370                                     auth_data->bss->bssid,
3371                                     auth_data->bss->bssid, NULL, 0, 0,
3372                                     tx_flags);
3373         } else {
3374                 const u8 *ssidie;
3375
3376                 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3377                            auth_data->bss->bssid, auth_data->tries,
3378                            IEEE80211_AUTH_MAX_TRIES);
3379
3380                 rcu_read_lock();
3381                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3382                 if (!ssidie) {
3383                         rcu_read_unlock();
3384                         return -EINVAL;
3385                 }
3386                 /*
3387                  * Direct probe is sent to broadcast address as some APs
3388                  * will not answer to direct packet in unassociated state.
3389                  */
3390                 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3391                                          NULL, 0, (u32) -1, true, 0,
3392                                          auth_data->bss->channel, false);
3393                 rcu_read_unlock();
3394         }
3395
3396         if (tx_flags == 0) {
3397                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3398                 ifmgd->auth_data->timeout_started = true;
3399                 run_again(sdata, auth_data->timeout);
3400         } else {
3401                 auth_data->timeout_started = false;
3402         }
3403
3404         return 0;
3405 }
3406
3407 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3408 {
3409         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3410         struct ieee80211_local *local = sdata->local;
3411
3412         sdata_assert_lock(sdata);
3413
3414         assoc_data->tries++;
3415         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3416                 sdata_info(sdata, "association with %pM timed out\n",
3417                            assoc_data->bss->bssid);
3418
3419                 /*
3420                  * Most likely AP is not in the range so remove the
3421                  * bss struct for that AP.
3422                  */
3423                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3424
3425                 return -ETIMEDOUT;
3426         }
3427
3428         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3429                    assoc_data->bss->bssid, assoc_data->tries,
3430                    IEEE80211_ASSOC_MAX_TRIES);
3431         ieee80211_send_assoc(sdata);
3432
3433         if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3434                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3435                 assoc_data->timeout_started = true;
3436                 run_again(sdata, assoc_data->timeout);
3437         } else {
3438                 assoc_data->timeout_started = false;
3439         }
3440
3441         return 0;
3442 }
3443
3444 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3445                                   __le16 fc, bool acked)
3446 {
3447         struct ieee80211_local *local = sdata->local;
3448
3449         sdata->u.mgd.status_fc = fc;
3450         sdata->u.mgd.status_acked = acked;
3451         sdata->u.mgd.status_received = true;
3452
3453         ieee80211_queue_work(&local->hw, &sdata->work);
3454 }
3455
3456 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3457 {
3458         struct ieee80211_local *local = sdata->local;
3459         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3460
3461         sdata_lock(sdata);
3462
3463         if (ifmgd->status_received) {
3464                 __le16 fc = ifmgd->status_fc;
3465                 bool status_acked = ifmgd->status_acked;
3466
3467                 ifmgd->status_received = false;
3468                 if (ifmgd->auth_data &&
3469                     (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3470                         if (status_acked) {
3471                                 ifmgd->auth_data->timeout =
3472                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3473                                 run_again(sdata, ifmgd->auth_data->timeout);
3474                         } else {
3475                                 ifmgd->auth_data->timeout = jiffies - 1;
3476                         }
3477                         ifmgd->auth_data->timeout_started = true;
3478                 } else if (ifmgd->assoc_data &&
3479                            (ieee80211_is_assoc_req(fc) ||
3480                             ieee80211_is_reassoc_req(fc))) {
3481                         if (status_acked) {
3482                                 ifmgd->assoc_data->timeout =
3483                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3484                                 run_again(sdata, ifmgd->assoc_data->timeout);
3485                         } else {
3486                                 ifmgd->assoc_data->timeout = jiffies - 1;
3487                         }
3488                         ifmgd->assoc_data->timeout_started = true;
3489                 }
3490         }
3491
3492         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3493             time_after(jiffies, ifmgd->auth_data->timeout)) {
3494                 if (ifmgd->auth_data->done) {
3495                         /*
3496                          * ok ... we waited for assoc but userspace didn't,
3497                          * so let's just kill the auth data
3498                          */
3499                         ieee80211_destroy_auth_data(sdata, false);
3500                 } else if (ieee80211_probe_auth(sdata)) {
3501                         u8 bssid[ETH_ALEN];
3502
3503                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3504
3505                         ieee80211_destroy_auth_data(sdata, false);
3506
3507                         cfg80211_auth_timeout(sdata->dev, bssid);
3508                 }
3509         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3510                 run_again(sdata, ifmgd->auth_data->timeout);
3511
3512         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3513             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3514                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3515                     ieee80211_do_assoc(sdata)) {
3516                         u8 bssid[ETH_ALEN];
3517
3518                         memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3519
3520                         ieee80211_destroy_assoc_data(sdata, false);
3521
3522                         cfg80211_assoc_timeout(sdata->dev, bssid);
3523                 }
3524         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3525                 run_again(sdata, ifmgd->assoc_data->timeout);
3526
3527         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3528                             IEEE80211_STA_CONNECTION_POLL) &&
3529             ifmgd->associated) {
3530                 u8 bssid[ETH_ALEN];
3531                 int max_tries;
3532
3533                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3534
3535                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3536                         max_tries = max_nullfunc_tries;
3537                 else
3538                         max_tries = max_probe_tries;
3539
3540                 /* ACK received for nullfunc probing frame */
3541                 if (!ifmgd->probe_send_count)
3542                         ieee80211_reset_ap_probe(sdata);
3543                 else if (ifmgd->nullfunc_failed) {
3544                         if (ifmgd->probe_send_count < max_tries) {
3545                                 mlme_dbg(sdata,
3546                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3547                                          bssid, ifmgd->probe_send_count,
3548                                          max_tries);
3549                                 ieee80211_mgd_probe_ap_send(sdata);
3550                         } else {
3551                                 mlme_dbg(sdata,
3552                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3553                                          bssid);
3554                                 ieee80211_sta_connection_lost(sdata, bssid,
3555                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3556                                         false);
3557                         }
3558                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3559                         run_again(sdata, ifmgd->probe_timeout);
3560                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3561                         mlme_dbg(sdata,
3562                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3563                                  bssid, probe_wait_ms);
3564                         ieee80211_sta_connection_lost(sdata, bssid,
3565                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3566                 } else if (ifmgd->probe_send_count < max_tries) {
3567                         mlme_dbg(sdata,
3568                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3569                                  bssid, probe_wait_ms,
3570                                  ifmgd->probe_send_count, max_tries);
3571                         ieee80211_mgd_probe_ap_send(sdata);
3572                 } else {
3573                         /*
3574                          * We actually lost the connection ... or did we?
3575                          * Let's make sure!
3576                          */
3577                         wiphy_debug(local->hw.wiphy,
3578                                     "%s: No probe response from AP %pM"
3579                                     " after %dms, disconnecting.\n",
3580                                     sdata->name,
3581                                     bssid, probe_wait_ms);
3582
3583                         ieee80211_sta_connection_lost(sdata, bssid,
3584                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3585                 }
3586         }
3587
3588         sdata_unlock(sdata);
3589 }
3590
3591 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3592 {
3593         struct ieee80211_sub_if_data *sdata =
3594                 (struct ieee80211_sub_if_data *) data;
3595         struct ieee80211_local *local = sdata->local;
3596
3597         if (local->quiescing)
3598                 return;
3599
3600         sdata->u.mgd.connection_loss = false;
3601         ieee80211_queue_work(&sdata->local->hw,
3602                              &sdata->u.mgd.beacon_connection_loss_work);
3603 }
3604
3605 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3606 {
3607         struct ieee80211_sub_if_data *sdata =
3608                 (struct ieee80211_sub_if_data *) data;
3609         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3610         struct ieee80211_local *local = sdata->local;
3611
3612         if (local->quiescing)
3613                 return;
3614
3615         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3616 }
3617
3618 static void ieee80211_sta_monitor_work(struct work_struct *work)
3619 {
3620         struct ieee80211_sub_if_data *sdata =
3621                 container_of(work, struct ieee80211_sub_if_data,
3622                              u.mgd.monitor_work);
3623
3624         ieee80211_mgd_probe_ap(sdata, false);
3625 }
3626
3627 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3628 {
3629         u32 flags;
3630
3631         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3632                 __ieee80211_stop_poll(sdata);
3633
3634                 /* let's probe the connection once */
3635                 flags = sdata->local->hw.flags;
3636                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3637                         ieee80211_queue_work(&sdata->local->hw,
3638                                              &sdata->u.mgd.monitor_work);
3639                 /* and do all the other regular work too */
3640                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3641         }
3642 }
3643
3644 #ifdef CONFIG_PM
3645 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3646 {
3647         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3648
3649         sdata_lock(sdata);
3650         if (!ifmgd->associated) {
3651                 sdata_unlock(sdata);
3652                 return;
3653         }
3654
3655         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3656                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3657                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3658                 ieee80211_sta_connection_lost(sdata,
3659                                               ifmgd->associated->bssid,
3660                                               WLAN_REASON_UNSPECIFIED,
3661                                               true);
3662                 sdata_unlock(sdata);
3663                 return;
3664         }
3665         sdata_unlock(sdata);
3666 }
3667 #endif
3668
3669 /* interface setup */
3670 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3671 {
3672         struct ieee80211_if_managed *ifmgd;
3673
3674         ifmgd = &sdata->u.mgd;
3675         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3676         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3677         INIT_WORK(&ifmgd->beacon_connection_loss_work,
3678                   ieee80211_beacon_connection_loss_work);
3679         INIT_WORK(&ifmgd->csa_connection_drop_work,
3680                   ieee80211_csa_connection_drop_work);
3681         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3682         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3683                     (unsigned long) sdata);
3684         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3685                     (unsigned long) sdata);
3686         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3687                     (unsigned long) sdata);
3688         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3689                     (unsigned long) sdata);
3690
3691         ifmgd->flags = 0;
3692         ifmgd->powersave = sdata->wdev.ps;
3693         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3694         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3695         ifmgd->p2p_noa_index = -1;
3696
3697         if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3698                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3699         else
3700                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3701 }
3702
3703 /* scan finished notification */
3704 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3705 {
3706         struct ieee80211_sub_if_data *sdata;
3707
3708         /* Restart STA timers */
3709         rcu_read_lock();
3710         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3711                 if (ieee80211_sdata_running(sdata))
3712                         ieee80211_restart_sta_timer(sdata);
3713         }
3714         rcu_read_unlock();
3715 }
3716
3717 int ieee80211_max_network_latency(struct notifier_block *nb,
3718                                   unsigned long data, void *dummy)
3719 {
3720         s32 latency_usec = (s32) data;
3721         struct ieee80211_local *local =
3722                 container_of(nb, struct ieee80211_local,
3723                              network_latency_notifier);
3724
3725         mutex_lock(&local->iflist_mtx);
3726         ieee80211_recalc_ps(local, latency_usec);
3727         mutex_unlock(&local->iflist_mtx);
3728
3729         return 0;
3730 }
3731
3732 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3733                                      struct cfg80211_bss *cbss)
3734 {
3735         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3736         const u8 *ht_cap_ie, *vht_cap_ie;
3737         const struct ieee80211_ht_cap *ht_cap;
3738         const struct ieee80211_vht_cap *vht_cap;
3739         u8 chains = 1;
3740
3741         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3742                 return chains;
3743
3744         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3745         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3746                 ht_cap = (void *)(ht_cap_ie + 2);
3747                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3748                 /*
3749                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3750                  *       "Tx Unequal Modulation Supported" fields.
3751                  */
3752         }
3753
3754         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3755                 return chains;
3756
3757         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3758         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3759                 u8 nss;
3760                 u16 tx_mcs_map;
3761
3762                 vht_cap = (void *)(vht_cap_ie + 2);
3763                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3764                 for (nss = 8; nss > 0; nss--) {
3765                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3766                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
3767                                 break;
3768                 }
3769                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3770                 chains = max(chains, nss);
3771         }
3772
3773         return chains;
3774 }
3775
3776 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3777                                   struct cfg80211_bss *cbss)
3778 {
3779         struct ieee80211_local *local = sdata->local;
3780         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3781         const struct ieee80211_ht_operation *ht_oper = NULL;
3782         const struct ieee80211_vht_operation *vht_oper = NULL;
3783         struct ieee80211_supported_band *sband;
3784         struct cfg80211_chan_def chandef;
3785         int ret;
3786
3787         sband = local->hw.wiphy->bands[cbss->channel->band];
3788
3789         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3790                           IEEE80211_STA_DISABLE_80P80MHZ |
3791                           IEEE80211_STA_DISABLE_160MHZ);
3792
3793         rcu_read_lock();
3794
3795         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3796             sband->ht_cap.ht_supported) {
3797                 const u8 *ht_oper_ie, *ht_cap;
3798
3799                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3800                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3801                         ht_oper = (void *)(ht_oper_ie + 2);
3802
3803                 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3804                 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3805                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3806                         ht_oper = NULL;
3807                 }
3808         }
3809
3810         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3811             sband->vht_cap.vht_supported) {
3812                 const u8 *vht_oper_ie, *vht_cap;
3813
3814                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3815                                                    WLAN_EID_VHT_OPERATION);
3816                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3817                         vht_oper = (void *)(vht_oper_ie + 2);
3818                 if (vht_oper && !ht_oper) {
3819                         vht_oper = NULL;
3820                         sdata_info(sdata,
3821                                    "AP advertised VHT without HT, disabling both\n");
3822                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3823                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3824                 }
3825
3826                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3827                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3828                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3829                         vht_oper = NULL;
3830                 }
3831         }
3832
3833         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3834                                                      cbss->channel,
3835                                                      ht_oper, vht_oper,
3836                                                      &chandef, true);
3837
3838         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3839                                       local->rx_chains);
3840
3841         rcu_read_unlock();
3842
3843         /* will change later if needed */
3844         sdata->smps_mode = IEEE80211_SMPS_OFF;
3845
3846         /*
3847          * If this fails (possibly due to channel context sharing
3848          * on incompatible channels, e.g. 80+80 and 160 sharing the
3849          * same control channel) try to use a smaller bandwidth.
3850          */
3851         ret = ieee80211_vif_use_channel(sdata, &chandef,
3852                                         IEEE80211_CHANCTX_SHARED);
3853
3854         /* don't downgrade for 5 and 10 MHz channels, though. */
3855         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3856             chandef.width == NL80211_CHAN_WIDTH_10)
3857                 return ret;
3858
3859         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3860                 ifmgd->flags |= chandef_downgrade(&chandef);
3861                 ret = ieee80211_vif_use_channel(sdata, &chandef,
3862                                                 IEEE80211_CHANCTX_SHARED);
3863         }
3864         return ret;
3865 }
3866
3867 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3868                                      struct cfg80211_bss *cbss, bool assoc)
3869 {
3870         struct ieee80211_local *local = sdata->local;
3871         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3872         struct ieee80211_bss *bss = (void *)cbss->priv;
3873         struct sta_info *new_sta = NULL;
3874         bool have_sta = false;
3875         int err;
3876
3877         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3878                 return -EINVAL;
3879
3880         if (assoc) {
3881                 rcu_read_lock();
3882                 have_sta = sta_info_get(sdata, cbss->bssid);
3883                 rcu_read_unlock();
3884         }
3885
3886         if (!have_sta) {
3887                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3888                 if (!new_sta)
3889                         return -ENOMEM;
3890         }
3891
3892         if (new_sta) {
3893                 u32 rates = 0, basic_rates = 0;
3894                 bool have_higher_than_11mbit;
3895                 int min_rate = INT_MAX, min_rate_index = -1;
3896                 struct ieee80211_supported_band *sband;
3897                 const struct cfg80211_bss_ies *ies;
3898
3899                 sband = local->hw.wiphy->bands[cbss->channel->band];
3900
3901                 err = ieee80211_prep_channel(sdata, cbss);
3902                 if (err) {
3903                         sta_info_free(local, new_sta);
3904                         return err;
3905                 }
3906
3907                 ieee80211_get_rates(sband, bss->supp_rates,
3908                                     bss->supp_rates_len,
3909                                     &rates, &basic_rates,
3910                                     &have_higher_than_11mbit,
3911                                     &min_rate, &min_rate_index);
3912
3913                 /*
3914                  * This used to be a workaround for basic rates missing
3915                  * in the association response frame. Now that we no
3916                  * longer use the basic rates from there, it probably
3917                  * doesn't happen any more, but keep the workaround so
3918                  * in case some *other* APs are buggy in different ways
3919                  * we can connect -- with a warning.
3920                  */
3921                 if (!basic_rates && min_rate_index >= 0) {
3922                         sdata_info(sdata,
3923                                    "No basic rates, using min rate instead\n");
3924                         basic_rates = BIT(min_rate_index);
3925                 }
3926
3927                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3928                 sdata->vif.bss_conf.basic_rates = basic_rates;
3929
3930                 /* cf. IEEE 802.11 9.2.12 */
3931                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3932                     have_higher_than_11mbit)
3933                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3934                 else
3935                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3936
3937                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3938
3939                 /* set timing information */
3940                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3941                 rcu_read_lock();
3942                 ies = rcu_dereference(cbss->beacon_ies);
3943                 if (ies) {
3944                         const u8 *tim_ie;
3945
3946                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3947                         sdata->vif.bss_conf.sync_device_ts =
3948                                 bss->device_ts_beacon;
3949                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3950                                                   ies->data, ies->len);
3951                         if (tim_ie && tim_ie[1] >= 2)
3952                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3953                         else
3954                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3955                 } else if (!(local->hw.flags &
3956                                         IEEE80211_HW_TIMING_BEACON_ONLY)) {
3957                         ies = rcu_dereference(cbss->proberesp_ies);
3958                         /* must be non-NULL since beacon IEs were NULL */
3959                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3960                         sdata->vif.bss_conf.sync_device_ts =
3961                                 bss->device_ts_presp;
3962                         sdata->vif.bss_conf.sync_dtim_count = 0;
3963                 } else {
3964                         sdata->vif.bss_conf.sync_tsf = 0;
3965                         sdata->vif.bss_conf.sync_device_ts = 0;
3966                         sdata->vif.bss_conf.sync_dtim_count = 0;
3967                 }
3968                 rcu_read_unlock();
3969
3970                 /* tell driver about BSSID, basic rates and timing */
3971                 ieee80211_bss_info_change_notify(sdata,
3972                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3973                         BSS_CHANGED_BEACON_INT);
3974
3975                 if (assoc)
3976                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3977
3978                 err = sta_info_insert(new_sta);
3979                 new_sta = NULL;
3980                 if (err) {
3981                         sdata_info(sdata,
3982                                    "failed to insert STA entry for the AP (error %d)\n",
3983                                    err);
3984                         return err;
3985                 }
3986         } else
3987                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3988
3989         return 0;
3990 }
3991
3992 /* config hooks */
3993 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3994                        struct cfg80211_auth_request *req)
3995 {
3996         struct ieee80211_local *local = sdata->local;
3997         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3998         struct ieee80211_mgd_auth_data *auth_data;
3999         u16 auth_alg;
4000         int err;
4001
4002         /* prepare auth data structure */
4003
4004         switch (req->auth_type) {
4005         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4006                 auth_alg = WLAN_AUTH_OPEN;
4007                 break;
4008         case NL80211_AUTHTYPE_SHARED_KEY:
4009                 if (IS_ERR(local->wep_tx_tfm))
4010                         return -EOPNOTSUPP;
4011                 auth_alg = WLAN_AUTH_SHARED_KEY;
4012                 break;
4013         case NL80211_AUTHTYPE_FT:
4014                 auth_alg = WLAN_AUTH_FT;
4015                 break;
4016         case NL80211_AUTHTYPE_NETWORK_EAP:
4017                 auth_alg = WLAN_AUTH_LEAP;
4018                 break;
4019         case NL80211_AUTHTYPE_SAE:
4020                 auth_alg = WLAN_AUTH_SAE;
4021                 break;
4022         default:
4023                 return -EOPNOTSUPP;
4024         }
4025
4026         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4027                             req->ie_len, GFP_KERNEL);
4028         if (!auth_data)
4029                 return -ENOMEM;
4030
4031         auth_data->bss = req->bss;
4032
4033         if (req->sae_data_len >= 4) {
4034                 __le16 *pos = (__le16 *) req->sae_data;
4035                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4036                 auth_data->sae_status = le16_to_cpu(pos[1]);
4037                 memcpy(auth_data->data, req->sae_data + 4,
4038                        req->sae_data_len - 4);
4039                 auth_data->data_len += req->sae_data_len - 4;
4040         }
4041
4042         if (req->ie && req->ie_len) {
4043                 memcpy(&auth_data->data[auth_data->data_len],
4044                        req->ie, req->ie_len);
4045                 auth_data->data_len += req->ie_len;
4046         }
4047
4048         if (req->key && req->key_len) {
4049                 auth_data->key_len = req->key_len;
4050                 auth_data->key_idx = req->key_idx;
4051                 memcpy(auth_data->key, req->key, req->key_len);
4052         }
4053
4054         auth_data->algorithm = auth_alg;
4055
4056         /* try to authenticate/probe */
4057
4058         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4059             ifmgd->assoc_data) {
4060                 err = -EBUSY;
4061                 goto err_free;
4062         }
4063
4064         if (ifmgd->auth_data)
4065                 ieee80211_destroy_auth_data(sdata, false);
4066
4067         /* prep auth_data so we don't go into idle on disassoc */
4068         ifmgd->auth_data = auth_data;
4069
4070         if (ifmgd->associated) {
4071                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4072
4073                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4074                                        WLAN_REASON_UNSPECIFIED,
4075                                        false, frame_buf);
4076
4077                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4078                                       sizeof(frame_buf));
4079         }
4080
4081         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4082
4083         err = ieee80211_prep_connection(sdata, req->bss, false);
4084         if (err)
4085                 goto err_clear;
4086
4087         err = ieee80211_probe_auth(sdata);
4088         if (err) {
4089                 sta_info_destroy_addr(sdata, req->bss->bssid);
4090                 goto err_clear;
4091         }
4092
4093         /* hold our own reference */
4094         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4095         return 0;
4096
4097  err_clear:
4098         memset(ifmgd->bssid, 0, ETH_ALEN);
4099         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4100         ifmgd->auth_data = NULL;
4101  err_free:
4102         kfree(auth_data);
4103         return err;
4104 }
4105
4106 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4107                         struct cfg80211_assoc_request *req)
4108 {
4109         struct ieee80211_local *local = sdata->local;
4110         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4111         struct ieee80211_bss *bss = (void *)req->bss->priv;
4112         struct ieee80211_mgd_assoc_data *assoc_data;
4113         const struct cfg80211_bss_ies *beacon_ies;
4114         struct ieee80211_supported_band *sband;
4115         const u8 *ssidie, *ht_ie, *vht_ie;
4116         int i, err;
4117
4118         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4119         if (!assoc_data)
4120                 return -ENOMEM;
4121
4122         rcu_read_lock();
4123         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4124         if (!ssidie) {
4125                 rcu_read_unlock();
4126                 kfree(assoc_data);
4127                 return -EINVAL;
4128         }
4129         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4130         assoc_data->ssid_len = ssidie[1];
4131         rcu_read_unlock();
4132
4133         if (ifmgd->associated) {
4134                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4135
4136                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4137                                        WLAN_REASON_UNSPECIFIED,
4138                                        false, frame_buf);
4139
4140                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4141                                       sizeof(frame_buf));
4142         }
4143
4144         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4145                 err = -EBUSY;
4146                 goto err_free;
4147         }
4148
4149         if (ifmgd->assoc_data) {
4150                 err = -EBUSY;
4151                 goto err_free;
4152         }
4153
4154         if (ifmgd->auth_data) {
4155                 bool match;
4156
4157                 /* keep sta info, bssid if matching */
4158                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4159                 ieee80211_destroy_auth_data(sdata, match);
4160         }
4161
4162         /* prepare assoc data */
4163
4164         ifmgd->beacon_crc_valid = false;
4165
4166         /*
4167          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4168          * We still associate in non-HT mode (11a/b/g) if any one of these
4169          * ciphers is configured as pairwise.
4170          * We can set this to true for non-11n hardware, that'll be checked
4171          * separately along with the peer capabilities.
4172          */
4173         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4174                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4175                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4176                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4177                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4178                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4179                         netdev_info(sdata->dev,
4180                                     "disabling HT/VHT due to WEP/TKIP use\n");
4181                 }
4182         }
4183
4184         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4185                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4186                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4187         }
4188
4189         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4190                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4191
4192         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4193         sband = local->hw.wiphy->bands[req->bss->channel->band];
4194         if (!sband->ht_cap.ht_supported ||
4195             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4196                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4197                 if (!bss->wmm_used)
4198                         netdev_info(sdata->dev,
4199                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4200         }
4201
4202         /* disable VHT if we don't support it or the AP doesn't use WMM */
4203         if (!sband->vht_cap.vht_supported ||
4204             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4205                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4206                 if (!bss->wmm_used)
4207                         netdev_info(sdata->dev,
4208                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4209         }
4210
4211         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4212         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4213                sizeof(ifmgd->ht_capa_mask));
4214
4215         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4216         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4217                sizeof(ifmgd->vht_capa_mask));
4218
4219         if (req->ie && req->ie_len) {
4220                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4221                 assoc_data->ie_len = req->ie_len;
4222         }
4223
4224         assoc_data->bss = req->bss;
4225
4226         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4227                 if (ifmgd->powersave)
4228                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4229                 else
4230                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4231         } else
4232                 sdata->smps_mode = ifmgd->req_smps;
4233
4234         assoc_data->capability = req->bss->capability;
4235         assoc_data->wmm = bss->wmm_used &&
4236                           (local->hw.queues >= IEEE80211_NUM_ACS);
4237         assoc_data->supp_rates = bss->supp_rates;
4238         assoc_data->supp_rates_len = bss->supp_rates_len;
4239
4240         rcu_read_lock();
4241         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4242         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4243                 assoc_data->ap_ht_param =
4244                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4245         else
4246                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4247         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4248         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4249                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4250                        sizeof(struct ieee80211_vht_cap));
4251         else
4252                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4253         rcu_read_unlock();
4254
4255         if (bss->wmm_used && bss->uapsd_supported &&
4256             (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4257             sdata->wmm_acm != 0xff) {
4258                 assoc_data->uapsd = true;
4259                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4260         } else {
4261                 assoc_data->uapsd = false;
4262                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4263         }
4264
4265         if (req->prev_bssid)
4266                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4267
4268         if (req->use_mfp) {
4269                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4270                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4271         } else {
4272                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4273                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4274         }
4275
4276         if (req->crypto.control_port)
4277                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4278         else
4279                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4280
4281         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4282         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4283
4284         /* kick off associate process */
4285
4286         ifmgd->assoc_data = assoc_data;
4287         ifmgd->dtim_period = 0;
4288         ifmgd->have_beacon = false;
4289
4290         err = ieee80211_prep_connection(sdata, req->bss, true);
4291         if (err)
4292                 goto err_clear;
4293
4294         rcu_read_lock();
4295         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4296
4297         if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4298             !beacon_ies) {
4299                 /*
4300                  * Wait up to one beacon interval ...
4301                  * should this be more if we miss one?
4302                  */
4303                 sdata_info(sdata, "waiting for beacon from %pM\n",
4304                            ifmgd->bssid);
4305                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4306                 assoc_data->timeout_started = true;
4307                 assoc_data->need_beacon = true;
4308         } else if (beacon_ies) {
4309                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4310                                                     beacon_ies->data,
4311                                                     beacon_ies->len);
4312                 u8 dtim_count = 0;
4313
4314                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4315                         const struct ieee80211_tim_ie *tim;
4316                         tim = (void *)(tim_ie + 2);
4317                         ifmgd->dtim_period = tim->dtim_period;
4318                         dtim_count = tim->dtim_count;
4319                 }
4320                 ifmgd->have_beacon = true;
4321                 assoc_data->timeout = jiffies;
4322                 assoc_data->timeout_started = true;
4323
4324                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4325                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4326                         sdata->vif.bss_conf.sync_device_ts =
4327                                 bss->device_ts_beacon;
4328                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4329                 }
4330         } else {
4331                 assoc_data->timeout = jiffies;
4332                 assoc_data->timeout_started = true;
4333         }
4334         rcu_read_unlock();
4335
4336         run_again(sdata, assoc_data->timeout);
4337
4338         if (bss->corrupt_data) {
4339                 char *corrupt_type = "data";
4340                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4341                         if (bss->corrupt_data &
4342                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4343                                 corrupt_type = "beacon and probe response";
4344                         else
4345                                 corrupt_type = "beacon";
4346                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4347                         corrupt_type = "probe response";
4348                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4349                            corrupt_type);
4350         }
4351
4352         return 0;
4353  err_clear:
4354         memset(ifmgd->bssid, 0, ETH_ALEN);
4355         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4356         ifmgd->assoc_data = NULL;
4357  err_free:
4358         kfree(assoc_data);
4359         return err;
4360 }
4361
4362 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4363                          struct cfg80211_deauth_request *req)
4364 {
4365         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4366         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4367         bool tx = !req->local_state_change;
4368         bool report_frame = false;
4369
4370         sdata_info(sdata,
4371                    "deauthenticating from %pM by local choice (reason=%d)\n",
4372                    req->bssid, req->reason_code);
4373
4374         if (ifmgd->auth_data) {
4375                 drv_mgd_prepare_tx(sdata->local, sdata);
4376                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4377                                                IEEE80211_STYPE_DEAUTH,
4378                                                req->reason_code, tx,
4379                                                frame_buf);
4380                 ieee80211_destroy_auth_data(sdata, false);
4381
4382                 report_frame = true;
4383                 goto out;
4384         }
4385
4386         if (ifmgd->associated &&
4387             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4388                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4389                                        req->reason_code, tx, frame_buf);
4390                 report_frame = true;
4391         }
4392
4393  out:
4394         if (report_frame)
4395                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4396                                       IEEE80211_DEAUTH_FRAME_LEN);
4397
4398         return 0;
4399 }
4400
4401 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4402                            struct cfg80211_disassoc_request *req)
4403 {
4404         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4405         u8 bssid[ETH_ALEN];
4406         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4407
4408         /*
4409          * cfg80211 should catch this ... but it's racy since
4410          * we can receive a disassoc frame, process it, hand it
4411          * to cfg80211 while that's in a locked section already
4412          * trying to tell us that the user wants to disconnect.
4413          */
4414         if (ifmgd->associated != req->bss)
4415                 return -ENOLINK;
4416
4417         sdata_info(sdata,
4418                    "disassociating from %pM by local choice (reason=%d)\n",
4419                    req->bss->bssid, req->reason_code);
4420
4421         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4422         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4423                                req->reason_code, !req->local_state_change,
4424                                frame_buf);
4425
4426         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4427                               IEEE80211_DEAUTH_FRAME_LEN);
4428
4429         return 0;
4430 }
4431
4432 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4433 {
4434         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4435
4436         /*
4437          * Make sure some work items will not run after this,
4438          * they will not do anything but might not have been
4439          * cancelled when disconnecting.
4440          */
4441         cancel_work_sync(&ifmgd->monitor_work);
4442         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4443         cancel_work_sync(&ifmgd->request_smps_work);
4444         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4445         cancel_work_sync(&ifmgd->chswitch_work);
4446
4447         sdata_lock(sdata);
4448         if (ifmgd->assoc_data)
4449                 ieee80211_destroy_assoc_data(sdata, false);
4450         if (ifmgd->auth_data)
4451                 ieee80211_destroy_auth_data(sdata, false);
4452         del_timer_sync(&ifmgd->timer);
4453         sdata_unlock(sdata);
4454 }
4455
4456 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4457                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4458                                gfp_t gfp)
4459 {
4460         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4461
4462         trace_api_cqm_rssi_notify(sdata, rssi_event);
4463
4464         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4465 }
4466 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);