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_LONG     (HZ / 2)
  35 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  36 #define IEEE80211_AUTH_MAX_TRIES        3
  37 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  38 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  39 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  40 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  41 #define IEEE80211_ASSOC_MAX_TRIES       3
  42
  43 static int max_nullfunc_tries = 2;
  44 module_param(max_nullfunc_tries, int, 0644);
  45 MODULE_PARM_DESC(max_nullfunc_tries,
  46                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  47
  48 static int max_probe_tries = 5;
  49 module_param(max_probe_tries, int, 0644);
  50 MODULE_PARM_DESC(max_probe_tries,
  51                  "Maximum probe tries before disconnecting (reason 4).");
  52
  53 /*
  54  * Beacon loss timeout is calculated as N frames times the
  55  * advertised beacon interval.  This may need to be somewhat
  56  * higher than what hardware might detect to account for
  57  * delays in the host processing frames. But since we also
  58  * probe on beacon miss before declaring the connection lost
  59  * default to what we want.
  60  */
  61 static int beacon_loss_count = 7;
  62 module_param(beacon_loss_count, int, 0644);
  63 MODULE_PARM_DESC(beacon_loss_count,
  64                  "Number of beacon intervals before we decide beacon was lost.");
  65
  66 /*
  67  * Time the connection can be idle before we probe
  68  * it to see if we can still talk to the AP.
  69  */
  70 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  71 /*
  72  * Time we wait for a probe response after sending
  73  * a probe request because of beacon loss or for
  74  * checking the connection still works.
  75  */
  76 static int probe_wait_ms = 500;
  77 module_param(probe_wait_ms, int, 0644);
  78 MODULE_PARM_DESC(probe_wait_ms,
  79                  "Maximum time(ms) to wait for probe response"
  80                  " before disconnecting (reason 4).");
  81
  82 /*
  83  * Weight given to the latest Beacon frame when calculating average signal
  84  * strength for Beacon frames received in the current BSS. This must be
  85  * between 1 and 15.
  86  */
  87 #define IEEE80211_SIGNAL_AVE_WEIGHT     3
  88
  89 /*
  90  * How many Beacon frames need to have been used in average signal strength
  91  * before starting to indicate signal change events.
  92  */
  93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  94
  95 /*
  96  * We can have multiple work items (and connection probing)
  97  * scheduling this timer, but we need to take care to only
  98  * reschedule it when it should fire _earlier_ than it was
  99  * asked for before, or if it's not pending right now. This
 100  * function ensures that. Note that it then is required to
 101  * run this function for all timeouts after the first one
 102  * has happened -- the work that runs from this timer will
 103  * do that.
 104  */
 105 static void run_again(struct ieee80211_sub_if_data *sdata,
 106                       unsigned long timeout)
 107 {
 108         sdata_assert_lock(sdata);
 109
 110         if (!timer_pending(&sdata->u.mgd.timer) ||
 111             time_before(timeout, sdata->u.mgd.timer.expires))
 112                 mod_timer(&sdata->u.mgd.timer, timeout);
 113 }
 114
 115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 116 {
 117         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 118                 return;
 119
 120         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 121                 return;
 122
 123         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 124                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 125 }
 126
 127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 128 {
 129         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 130
 131         if (unlikely(!sdata->u.mgd.associated))
 132                 return;
 133
 134         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 135                 return;
 136
 137         mod_timer(&sdata->u.mgd.conn_mon_timer,
 138                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 139
 140         ifmgd->probe_send_count = 0;
 141 }
 142
 143 static int ecw2cw(int ecw)
 144 {
 145         return (1 << ecw) - 1;
 146 }
 147
 148 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
 149 {
 150         u32 ret;
 151         int tmp;
 152
 153         switch (c->width) {
 154         case NL80211_CHAN_WIDTH_20:
 155                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
 156                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 157                 break;
 158         case NL80211_CHAN_WIDTH_40:
 159                 c->width = NL80211_CHAN_WIDTH_20;
 160                 c->center_freq1 = c->chan->center_freq;
 161                 ret = IEEE80211_STA_DISABLE_40MHZ |
 162                       IEEE80211_STA_DISABLE_VHT;
 163                 break;
 164         case NL80211_CHAN_WIDTH_80:
 165                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
 166                 /* n_P40 */
 167                 tmp /= 2;
 168                 /* freq_P40 */
 169                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
 170                 c->width = NL80211_CHAN_WIDTH_40;
 171                 ret = IEEE80211_STA_DISABLE_VHT;
 172                 break;
 173         case NL80211_CHAN_WIDTH_80P80:
 174                 c->center_freq2 = 0;
 175                 c->width = NL80211_CHAN_WIDTH_80;
 176                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
 177                       IEEE80211_STA_DISABLE_160MHZ;
 178                 break;
 179         case NL80211_CHAN_WIDTH_160:
 180                 /* n_P20 */
 181                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
 182                 /* n_P80 */
 183                 tmp /= 4;
 184                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
 185                 c->width = NL80211_CHAN_WIDTH_80;
 186                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
 187                       IEEE80211_STA_DISABLE_160MHZ;
 188                 break;
 189         default:
 190         case NL80211_CHAN_WIDTH_20_NOHT:
 191                 WARN_ON_ONCE(1);
 192                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
 193                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 194                 break;
 195         case NL80211_CHAN_WIDTH_5:
 196         case NL80211_CHAN_WIDTH_10:
 197                 WARN_ON_ONCE(1);
 198                 /* keep c->width */
 199                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 200                 break;
 201         }
 202
 203         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
 204
 205         return ret;
 206 }
 207
 208 static u32
 209 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 210                              struct ieee80211_supported_band *sband,
 211                              struct ieee80211_channel *channel,
 212                              const struct ieee80211_ht_operation *ht_oper,
 213                              const struct ieee80211_vht_operation *vht_oper,
 214                              struct cfg80211_chan_def *chandef, bool tracking)
 215 {
 216         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 217         struct cfg80211_chan_def vht_chandef;
 218         u32 ht_cfreq, ret;
 219
 220         chandef->chan = channel;
 221         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 222         chandef->center_freq1 = channel->center_freq;
 223         chandef->center_freq2 = 0;
 224
 225         if (!ht_oper || !sband->ht_cap.ht_supported) {
 226                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 227                 goto out;
 228         }
 229
 230         chandef->width = NL80211_CHAN_WIDTH_20;
 231
 232         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 233                                                   channel->band);
 234         /* check that channel matches the right operating channel */
 235         if (!tracking && channel->center_freq != ht_cfreq) {
 236                 /*
 237                  * It's possible that some APs are confused here;
 238                  * Netgear WNDR3700 sometimes reports 4 higher than
 239                  * the actual channel in association responses, but
 240                  * since we look at probe response/beacon data here
 241                  * it should be OK.
 242                  */
 243                 sdata_info(sdata,
 244                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 245                            channel->center_freq, ht_cfreq,
 246                            ht_oper->primary_chan, channel->band);
 247                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 248                 goto out;
 249         }
 250
 251         /* check 40 MHz support, if we have it */
 252         if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 253                 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 254                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 255                         chandef->width = NL80211_CHAN_WIDTH_40;
 256                         chandef->center_freq1 += 10;
 257                         break;
 258                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 259                         chandef->width = NL80211_CHAN_WIDTH_40;
 260                         chandef->center_freq1 -= 10;
 261                         break;
 262                 }
 263         } else {
 264                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 265                 ret = IEEE80211_STA_DISABLE_VHT;
 266                 /* also mark 40 MHz disabled */
 267                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 268                 goto out;
 269         }
 270
 271         if (!vht_oper || !sband->vht_cap.vht_supported) {
 272                 ret = IEEE80211_STA_DISABLE_VHT;
 273                 goto out;
 274         }
 275
 276         vht_chandef.chan = channel;
 277         vht_chandef.center_freq1 =
 278                 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
 279                                                channel->band);
 280         vht_chandef.center_freq2 = 0;
 281
 282         switch (vht_oper->chan_width) {
 283         case IEEE80211_VHT_CHANWIDTH_USE_HT:
 284                 vht_chandef.width = chandef->width;
 285                 break;
 286         case IEEE80211_VHT_CHANWIDTH_80MHZ:
 287                 vht_chandef.width = NL80211_CHAN_WIDTH_80;
 288                 break;
 289         case IEEE80211_VHT_CHANWIDTH_160MHZ:
 290                 vht_chandef.width = NL80211_CHAN_WIDTH_160;
 291                 break;
 292         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
 293                 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
 294                 vht_chandef.center_freq2 =
 295                         ieee80211_channel_to_frequency(
 296                                 vht_oper->center_freq_seg2_idx,
 297                                 channel->band);
 298                 break;
 299         default:
 300                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 301                         sdata_info(sdata,
 302                                    "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
 303                                    vht_oper->chan_width);
 304                 ret = IEEE80211_STA_DISABLE_VHT;
 305                 goto out;
 306         }
 307
 308         if (!cfg80211_chandef_valid(&vht_chandef)) {
 309                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 310                         sdata_info(sdata,
 311                                    "AP VHT information is invalid, disable VHT\n");
 312                 ret = IEEE80211_STA_DISABLE_VHT;
 313                 goto out;
 314         }
 315
 316         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 317                 ret = 0;
 318                 goto out;
 319         }
 320
 321         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 322                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 323                         sdata_info(sdata,
 324                                    "AP VHT information doesn't match HT, disable VHT\n");
 325                 ret = IEEE80211_STA_DISABLE_VHT;
 326                 goto out;
 327         }
 328
 329         *chandef = vht_chandef;
 330
 331         ret = 0;
 332
 333 out:
 334         /* don't print the message below for VHT mismatch if VHT is disabled */
 335         if (ret & IEEE80211_STA_DISABLE_VHT)
 336                 vht_chandef = *chandef;
 337
 338         /*
 339          * Ignore the DISABLED flag when we're already connected and only
 340          * tracking the APs beacon for bandwidth changes - otherwise we
 341          * might get disconnected here if we connect to an AP, update our
 342          * regulatory information based on the AP's country IE and the
 343          * information we have is wrong/outdated and disables the channel
 344          * that we're actually using for the connection to the AP.
 345          */
 346         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 347                                         tracking ? 0 :
 348                                                    IEEE80211_CHAN_DISABLED)) {
 349                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 350                         ret = IEEE80211_STA_DISABLE_HT |
 351                               IEEE80211_STA_DISABLE_VHT;
 352                         break;
 353                 }
 354
 355                 ret |= chandef_downgrade(chandef);
 356         }
 357
 358         if (chandef->width != vht_chandef.width && !tracking)
 359                 sdata_info(sdata,
 360                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 361
 362         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 363         return ret;
 364 }
 365
 366 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 367                                struct sta_info *sta,
 368                                const struct ieee80211_ht_operation *ht_oper,
 369                                const struct ieee80211_vht_operation *vht_oper,
 370                                const u8 *bssid, u32 *changed)
 371 {
 372         struct ieee80211_local *local = sdata->local;
 373         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 374         struct ieee80211_supported_band *sband;
 375         struct ieee80211_channel *chan;
 376         struct cfg80211_chan_def chandef;
 377         u16 ht_opmode;
 378         u32 flags;
 379         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 380         int ret;
 381
 382         /* if HT was/is disabled, don't track any bandwidth changes */
 383         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 384                 return 0;
 385
 386         /* don't check VHT if we associated as non-VHT station */
 387         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 388                 vht_oper = NULL;
 389
 390         if (WARN_ON_ONCE(!sta))
 391                 return -EINVAL;
 392
 393         chan = sdata->vif.bss_conf.chandef.chan;
 394         sband = local->hw.wiphy->bands[chan->band];
 395
 396         /* calculate new channel (type) based on HT/VHT operation IEs */
 397         flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
 398                                              vht_oper, &chandef, true);
 399
 400         /*
 401          * Downgrade the new channel if we associated with restricted
 402          * capabilities. For example, if we associated as a 20 MHz STA
 403          * to a 40 MHz AP (due to regulatory, capabilities or config
 404          * reasons) then switching to a 40 MHz channel now won't do us
 405          * any good -- we couldn't use it with the AP.
 406          */
 407         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 408             chandef.width == NL80211_CHAN_WIDTH_80P80)
 409                 flags |= chandef_downgrade(&chandef);
 410         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 411             chandef.width == NL80211_CHAN_WIDTH_160)
 412                 flags |= chandef_downgrade(&chandef);
 413         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 414             chandef.width > NL80211_CHAN_WIDTH_20)
 415                 flags |= chandef_downgrade(&chandef);
 416
 417         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 418                 return 0;
 419
 420         sdata_info(sdata,
 421                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 422                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 423                    chandef.center_freq1, chandef.center_freq2);
 424
 425         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 426                                       IEEE80211_STA_DISABLE_VHT |
 427                                       IEEE80211_STA_DISABLE_40MHZ |
 428                                       IEEE80211_STA_DISABLE_80P80MHZ |
 429                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 430             !cfg80211_chandef_valid(&chandef)) {
 431                 sdata_info(sdata,
 432                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 433                            ifmgd->bssid);
 434                 return -EINVAL;
 435         }
 436
 437         switch (chandef.width) {
 438         case NL80211_CHAN_WIDTH_20_NOHT:
 439         case NL80211_CHAN_WIDTH_20:
 440                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 441                 break;
 442         case NL80211_CHAN_WIDTH_40:
 443                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 444                 break;
 445         case NL80211_CHAN_WIDTH_80:
 446                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 447                 break;
 448         case NL80211_CHAN_WIDTH_80P80:
 449         case NL80211_CHAN_WIDTH_160:
 450                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 451                 break;
 452         default:
 453                 return -EINVAL;
 454         }
 455
 456         if (new_sta_bw > sta->cur_max_bandwidth)
 457                 new_sta_bw = sta->cur_max_bandwidth;
 458
 459         if (new_sta_bw < sta->sta.bandwidth) {
 460                 sta->sta.bandwidth = new_sta_bw;
 461                 rate_control_rate_update(local, sband, sta,
 462                                          IEEE80211_RC_BW_CHANGED);
 463         }
 464
 465         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 466         if (ret) {
 467                 sdata_info(sdata,
 468                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 469                            ifmgd->bssid);
 470                 return ret;
 471         }
 472
 473         if (new_sta_bw > sta->sta.bandwidth) {
 474                 sta->sta.bandwidth = new_sta_bw;
 475                 rate_control_rate_update(local, sband, sta,
 476                                          IEEE80211_RC_BW_CHANGED);
 477         }
 478
 479         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 480
 481         /* if bss configuration changed store the new one */
 482         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 483                 *changed |= BSS_CHANGED_HT;
 484                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 485         }
 486
 487         return 0;
 488 }
 489
 490 /* frame sending functions */
 491
 492 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 493                                 struct sk_buff *skb, u8 ap_ht_param,
 494                                 struct ieee80211_supported_band *sband,
 495                                 struct ieee80211_channel *channel,
 496                                 enum ieee80211_smps_mode smps)
 497 {
 498         u8 *pos;
 499         u32 flags = channel->flags;
 500         u16 cap;
 501         struct ieee80211_sta_ht_cap ht_cap;
 502
 503         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 504
 505         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 506         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 507
 508         /* determine capability flags */
 509         cap = ht_cap.cap;
 510
 511         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 512         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 513                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 514                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 515                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 516                 }
 517                 break;
 518         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 519                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 520                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 521                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 522                 }
 523                 break;
 524         }
 525
 526         /*
 527          * If 40 MHz was disabled associate as though we weren't
 528          * capable of 40 MHz -- some broken APs will never fall
 529          * back to trying to transmit in 20 MHz.
 530          */
 531         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 532                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 533                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 534         }
 535
 536         /* set SM PS mode properly */
 537         cap &= ~IEEE80211_HT_CAP_SM_PS;
 538         switch (smps) {
 539         case IEEE80211_SMPS_AUTOMATIC:
 540         case IEEE80211_SMPS_NUM_MODES:
 541                 WARN_ON(1);
 542         case IEEE80211_SMPS_OFF:
 543                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 544                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 545                 break;
 546         case IEEE80211_SMPS_STATIC:
 547                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 548                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 549                 break;
 550         case IEEE80211_SMPS_DYNAMIC:
 551                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 552                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 553                 break;
 554         }
 555
 556         /* reserve and fill IE */
 557         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 558         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 559 }
 560
 561 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 562                                  struct sk_buff *skb,
 563                                  struct ieee80211_supported_band *sband,
 564                                  struct ieee80211_vht_cap *ap_vht_cap)
 565 {
 566         u8 *pos;
 567         u32 cap;
 568         struct ieee80211_sta_vht_cap vht_cap;
 569
 570         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 571
 572         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 573         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 574
 575         /* determine capability flags */
 576         cap = vht_cap.cap;
 577
 578         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 579                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
 580                 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 581         }
 582
 583         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 584                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 585                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 586         }
 587
 588         /*
 589          * Some APs apparently get confused if our capabilities are better
 590          * than theirs, so restrict what we advertise in the assoc request.
 591          */
 592         if (!(ap_vht_cap->vht_cap_info &
 593                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 594                 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
 595
 596         /* reserve and fill IE */
 597         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 598         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 599 }
 600
 601 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 602 {
 603         struct ieee80211_local *local = sdata->local;
 604         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 605         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 606         struct sk_buff *skb;
 607         struct ieee80211_mgmt *mgmt;
 608         u8 *pos, qos_info;
 609         size_t offset = 0, noffset;
 610         int i, count, rates_len, supp_rates_len, shift;
 611         u16 capab;
 612         struct ieee80211_supported_band *sband;
 613         struct ieee80211_chanctx_conf *chanctx_conf;
 614         struct ieee80211_channel *chan;
 615         u32 rate_flags, rates = 0;
 616
 617         sdata_assert_lock(sdata);
 618
 619         rcu_read_lock();
 620         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 621         if (WARN_ON(!chanctx_conf)) {
 622                 rcu_read_unlock();
 623                 return;
 624         }
 625         chan = chanctx_conf->def.chan;
 626         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 627         rcu_read_unlock();
 628         sband = local->hw.wiphy->bands[chan->band];
 629         shift = ieee80211_vif_get_shift(&sdata->vif);
 630
 631         if (assoc_data->supp_rates_len) {
 632                 /*
 633                  * Get all rates supported by the device and the AP as
 634                  * some APs don't like getting a superset of their rates
 635                  * in the association request (e.g. D-Link DAP 1353 in
 636                  * b-only mode)...
 637                  */
 638                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 639                                                      assoc_data->supp_rates,
 640                                                      assoc_data->supp_rates_len,
 641                                                      &rates);
 642         } else {
 643                 /*
 644                  * In case AP not provide any supported rates information
 645                  * before association, we send information element(s) with
 646                  * all rates that we support.
 647                  */
 648                 rates_len = 0;
 649                 for (i = 0; i < sband->n_bitrates; i++) {
 650                         if ((rate_flags & sband->bitrates[i].flags)
 651                             != rate_flags)
 652                                 continue;
 653                         rates |= BIT(i);
 654                         rates_len++;
 655                 }
 656         }
 657
 658         skb = alloc_skb(local->hw.extra_tx_headroom +
 659                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 660                         2 + assoc_data->ssid_len + /* SSID */
 661                         4 + rates_len + /* (extended) rates */
 662                         4 + /* power capability */
 663                         2 + 2 * sband->n_channels + /* supported channels */
 664                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 665                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 666                         assoc_data->ie_len + /* extra IEs */
 667                         9, /* WMM */
 668                         GFP_KERNEL);
 669         if (!skb)
 670                 return;
 671
 672         skb_reserve(skb, local->hw.extra_tx_headroom);
 673
 674         capab = WLAN_CAPABILITY_ESS;
 675
 676         if (sband->band == IEEE80211_BAND_2GHZ) {
 677                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 678                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 679                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 680                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 681         }
 682
 683         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 684                 capab |= WLAN_CAPABILITY_PRIVACY;
 685
 686         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 687             (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 688                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 689
 690         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 691         memset(mgmt, 0, 24);
 692         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 693         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 694         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 695
 696         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 697                 skb_put(skb, 10);
 698                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 699                                                   IEEE80211_STYPE_REASSOC_REQ);
 700                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 701                 mgmt->u.reassoc_req.listen_interval =
 702                                 cpu_to_le16(local->hw.conf.listen_interval);
 703                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 704                        ETH_ALEN);
 705         } else {
 706                 skb_put(skb, 4);
 707                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 708                                                   IEEE80211_STYPE_ASSOC_REQ);
 709                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 710                 mgmt->u.assoc_req.listen_interval =
 711                                 cpu_to_le16(local->hw.conf.listen_interval);
 712         }
 713
 714         /* SSID */
 715         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 716         *pos++ = WLAN_EID_SSID;
 717         *pos++ = assoc_data->ssid_len;
 718         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 719
 720         /* add all rates which were marked to be used above */
 721         supp_rates_len = rates_len;
 722         if (supp_rates_len > 8)
 723                 supp_rates_len = 8;
 724
 725         pos = skb_put(skb, supp_rates_len + 2);
 726         *pos++ = WLAN_EID_SUPP_RATES;
 727         *pos++ = supp_rates_len;
 728
 729         count = 0;
 730         for (i = 0; i < sband->n_bitrates; i++) {
 731                 if (BIT(i) & rates) {
 732                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 733                                                 5 * (1 << shift));
 734                         *pos++ = (u8) rate;
 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;
 748                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 749                                                     5 * (1 << shift));
 750                                 *pos++ = (u8) rate;
 751                         }
 752                 }
 753         }
 754
 755         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 756                 /* 1. power capabilities */
 757                 pos = skb_put(skb, 4);
 758                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 759                 *pos++ = 2;
 760                 *pos++ = 0; /* min tx power */
 761                  /* max tx power */
 762                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 763
 764                 /* 2. supported channels */
 765                 /* TODO: get this in reg domain format */
 766                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 767                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 768                 *pos++ = 2 * sband->n_channels;
 769                 for (i = 0; i < sband->n_channels; i++) {
 770                         *pos++ = ieee80211_frequency_to_channel(
 771                                         sband->channels[i].center_freq);
 772                         *pos++ = 1; /* one channel in the subband*/
 773                 }
 774         }
 775
 776         /* if present, add any custom IEs that go before HT */
 777         if (assoc_data->ie_len && assoc_data->ie) {
 778                 static const u8 before_ht[] = {
 779                         WLAN_EID_SSID,
 780                         WLAN_EID_SUPP_RATES,
 781                         WLAN_EID_EXT_SUPP_RATES,
 782                         WLAN_EID_PWR_CAPABILITY,
 783                         WLAN_EID_SUPPORTED_CHANNELS,
 784                         WLAN_EID_RSN,
 785                         WLAN_EID_QOS_CAPA,
 786                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 787                         WLAN_EID_MOBILITY_DOMAIN,
 788                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 789                 };
 790                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 791                                              before_ht, ARRAY_SIZE(before_ht),
 792                                              offset);
 793                 pos = skb_put(skb, noffset - offset);
 794                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 795                 offset = noffset;
 796         }
 797
 798         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 799                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 800                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 801
 802         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 803                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 804                                     sband, chan, sdata->smps_mode);
 805
 806         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 807                 ieee80211_add_vht_ie(sdata, skb, sband,
 808                                      &assoc_data->ap_vht_cap);
 809
 810         /* if present, add any custom non-vendor IEs that go after HT */
 811         if (assoc_data->ie_len && assoc_data->ie) {
 812                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 813                                                     assoc_data->ie_len,
 814                                                     offset);
 815                 pos = skb_put(skb, noffset - offset);
 816                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 817                 offset = noffset;
 818         }
 819
 820         if (assoc_data->wmm) {
 821                 if (assoc_data->uapsd) {
 822                         qos_info = ifmgd->uapsd_queues;
 823                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 824                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 825                 } else {
 826                         qos_info = 0;
 827                 }
 828
 829                 pos = skb_put(skb, 9);
 830                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 831                 *pos++ = 7; /* len */
 832                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 833                 *pos++ = 0x50;
 834                 *pos++ = 0xf2;
 835                 *pos++ = 2; /* WME */
 836                 *pos++ = 0; /* WME info */
 837                 *pos++ = 1; /* WME ver */
 838                 *pos++ = qos_info;
 839         }
 840
 841         /* add any remaining custom (i.e. vendor specific here) IEs */
 842         if (assoc_data->ie_len && assoc_data->ie) {
 843                 noffset = assoc_data->ie_len;
 844                 pos = skb_put(skb, noffset - offset);
 845                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 846         }
 847
 848         drv_mgd_prepare_tx(local, sdata);
 849
 850         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 851         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 852                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 853                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 854         ieee80211_tx_skb(sdata, skb);
 855 }
 856
 857 void ieee80211_send_pspoll(struct ieee80211_local *local,
 858                            struct ieee80211_sub_if_data *sdata)
 859 {
 860         struct ieee80211_pspoll *pspoll;
 861         struct sk_buff *skb;
 862
 863         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 864         if (!skb)
 865                 return;
 866
 867         pspoll = (struct ieee80211_pspoll *) skb->data;
 868         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 869
 870         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 871         ieee80211_tx_skb(sdata, skb);
 872 }
 873
 874 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 875                              struct ieee80211_sub_if_data *sdata,
 876                              int powersave)
 877 {
 878         struct sk_buff *skb;
 879         struct ieee80211_hdr_3addr *nullfunc;
 880         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 881
 882         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 883         if (!skb)
 884                 return;
 885
 886         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 887         if (powersave)
 888                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 889
 890         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 891                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 892
 893         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 894                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 895
 896         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 897                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 898
 899         ieee80211_tx_skb(sdata, skb);
 900 }
 901
 902 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 903                                           struct ieee80211_sub_if_data *sdata)
 904 {
 905         struct sk_buff *skb;
 906         struct ieee80211_hdr *nullfunc;
 907         __le16 fc;
 908
 909         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 910                 return;
 911
 912         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 913         if (!skb)
 914                 return;
 915
 916         skb_reserve(skb, local->hw.extra_tx_headroom);
 917
 918         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 919         memset(nullfunc, 0, 30);
 920         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 921                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 922         nullfunc->frame_control = fc;
 923         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 924         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 925         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 926         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 927
 928         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 929         ieee80211_tx_skb(sdata, skb);
 930 }
 931
 932 /* spectrum management related things */
 933 static void ieee80211_chswitch_work(struct work_struct *work)
 934 {
 935         struct ieee80211_sub_if_data *sdata =
 936                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 937         struct ieee80211_local *local = sdata->local;
 938         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 939
 940         if (!ieee80211_sdata_running(sdata))
 941                 return;
 942
 943         sdata_lock(sdata);
 944         if (!ifmgd->associated)
 945                 goto out;
 946
 947         local->_oper_chandef = local->csa_chandef;
 948
 949         if (!local->ops->channel_switch) {
 950                 /* call "hw_config" only if doing sw channel switch */
 951                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
 952         } else {
 953                 /* update the device channel directly */
 954                 local->hw.conf.chandef = local->_oper_chandef;
 955         }
 956
 957         /* XXX: shouldn't really modify cfg80211-owned data! */
 958         ifmgd->associated->channel = local->_oper_chandef.chan;
 959
 960         /* XXX: wait for a beacon first? */
 961         ieee80211_wake_queues_by_reason(&local->hw,
 962                                         IEEE80211_MAX_QUEUE_MAP,
 963                                         IEEE80211_QUEUE_STOP_REASON_CSA);
 964  out:
 965         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
 966         sdata_unlock(sdata);
 967 }
 968
 969 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
 970 {
 971         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 972         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 973
 974         trace_api_chswitch_done(sdata, success);
 975         if (!success) {
 976                 sdata_info(sdata,
 977                            "driver channel switch failed, disconnecting\n");
 978                 ieee80211_queue_work(&sdata->local->hw,
 979                                      &ifmgd->csa_connection_drop_work);
 980         } else {
 981                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
 982         }
 983 }
 984 EXPORT_SYMBOL(ieee80211_chswitch_done);
 985
 986 static void ieee80211_chswitch_timer(unsigned long data)
 987 {
 988         struct ieee80211_sub_if_data *sdata =
 989                 (struct ieee80211_sub_if_data *) data;
 990
 991         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
 992 }
 993
 994 static void
 995 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 996                                  u64 timestamp, struct ieee802_11_elems *elems,
 997                                  bool beacon)
 998 {
 999         struct ieee80211_local *local = sdata->local;
1000         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1001         struct cfg80211_bss *cbss = ifmgd->associated;
1002         struct ieee80211_bss *bss;
1003         struct ieee80211_chanctx *chanctx;
1004         enum ieee80211_band new_band;
1005         int new_freq;
1006         u8 new_chan_no;
1007         u8 count;
1008         u8 mode;
1009         struct ieee80211_channel *new_chan;
1010         struct cfg80211_chan_def new_chandef = {};
1011         struct cfg80211_chan_def new_vht_chandef = {};
1012         const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1013         const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1014         const struct ieee80211_ht_operation *ht_oper;
1015         int secondary_channel_offset = -1;
1016
1017         sdata_assert_lock(sdata);
1018
1019         if (!cbss)
1020                 return;
1021
1022         if (local->scanning)
1023                 return;
1024
1025         /* disregard subsequent announcements if we are already processing */
1026         if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1027                 return;
1028
1029         sec_chan_offs = elems->sec_chan_offs;
1030         wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
1031         ht_oper = elems->ht_operation;
1032
1033         if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1034                             IEEE80211_STA_DISABLE_40MHZ)) {
1035                 sec_chan_offs = NULL;
1036                 wide_bw_chansw_ie = NULL;
1037                 /* only used for bandwidth here */
1038                 ht_oper = NULL;
1039         }
1040
1041         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1042                 wide_bw_chansw_ie = NULL;
1043
1044         if (elems->ext_chansw_ie) {
1045                 if (!ieee80211_operating_class_to_band(
1046                                 elems->ext_chansw_ie->new_operating_class,
1047                                 &new_band)) {
1048                         sdata_info(sdata,
1049                                    "cannot understand ECSA IE operating class %d, disconnecting\n",
1050                                    elems->ext_chansw_ie->new_operating_class);
1051                         ieee80211_queue_work(&local->hw,
1052                                              &ifmgd->csa_connection_drop_work);
1053                 }
1054                 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1055                 count = elems->ext_chansw_ie->count;
1056                 mode = elems->ext_chansw_ie->mode;
1057         } else if (elems->ch_switch_ie) {
1058                 new_band = cbss->channel->band;
1059                 new_chan_no = elems->ch_switch_ie->new_ch_num;
1060                 count = elems->ch_switch_ie->count;
1061                 mode = elems->ch_switch_ie->mode;
1062         } else {
1063                 /* nothing here we understand */
1064                 return;
1065         }
1066
1067         bss = (void *)cbss->priv;
1068
1069         new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
1070         new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1071         if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
1072                 sdata_info(sdata,
1073                            "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1074                            ifmgd->associated->bssid, new_freq);
1075                 ieee80211_queue_work(&local->hw,
1076                                      &ifmgd->csa_connection_drop_work);
1077                 return;
1078         }
1079
1080         if (!beacon && sec_chan_offs) {
1081                 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
1082         } else if (beacon && ht_oper) {
1083                 secondary_channel_offset =
1084                         ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
1085         } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
1086                 /*
1087                  * If it's not a beacon, HT is enabled and the IE not present,
1088                  * it's 20 MHz, 802.11-2012 8.5.2.6:
1089                  *      This element [the Secondary Channel Offset Element] is
1090                  *      present when switching to a 40 MHz channel. It may be
1091                  *      present when switching to a 20 MHz channel (in which
1092                  *      case the secondary channel offset is set to SCN).
1093                  */
1094                 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1095         }
1096
1097         switch (secondary_channel_offset) {
1098         default:
1099                 /* secondary_channel_offset was present but is invalid */
1100         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1101                 cfg80211_chandef_create(&new_chandef, new_chan,
1102                                         NL80211_CHAN_HT20);
1103                 break;
1104         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1105                 cfg80211_chandef_create(&new_chandef, new_chan,
1106                                         NL80211_CHAN_HT40PLUS);
1107                 break;
1108         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1109                 cfg80211_chandef_create(&new_chandef, new_chan,
1110                                         NL80211_CHAN_HT40MINUS);
1111                 break;
1112         case -1:
1113                 cfg80211_chandef_create(&new_chandef, new_chan,
1114                                         NL80211_CHAN_NO_HT);
1115                 /* keep width for 5/10 MHz channels */
1116                 switch (sdata->vif.bss_conf.chandef.width) {
1117                 case NL80211_CHAN_WIDTH_5:
1118                 case NL80211_CHAN_WIDTH_10:
1119                         new_chandef.width = sdata->vif.bss_conf.chandef.width;
1120                         break;
1121                 default:
1122                         break;
1123                 }
1124                 break;
1125         }
1126
1127         if (wide_bw_chansw_ie) {
1128                 new_vht_chandef.chan = new_chan;
1129                 new_vht_chandef.center_freq1 =
1130                         ieee80211_channel_to_frequency(
1131                                 wide_bw_chansw_ie->new_center_freq_seg0,
1132                                 new_band);
1133
1134                 switch (wide_bw_chansw_ie->new_channel_width) {
1135                 default:
1136                         /* hmmm, ignore VHT and use HT if present */
1137                 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1138                         new_vht_chandef.chan = NULL;
1139                         break;
1140                 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1141                         new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1142                         break;
1143                 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1144                         new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1145                         break;
1146                 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1147                         /* field is otherwise reserved */
1148                         new_vht_chandef.center_freq2 =
1149                                 ieee80211_channel_to_frequency(
1150                                         wide_bw_chansw_ie->new_center_freq_seg1,
1151                                         new_band);
1152                         new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1153                         break;
1154                 }
1155                 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1156                     new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1157                         chandef_downgrade(&new_vht_chandef);
1158                 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1159                     new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1160                         chandef_downgrade(&new_vht_chandef);
1161                 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1162                     new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1163                         chandef_downgrade(&new_vht_chandef);
1164         }
1165
1166         /* if VHT data is there validate & use it */
1167         if (new_vht_chandef.chan) {
1168                 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1169                                                  &new_chandef)) {
1170                         sdata_info(sdata,
1171                                    "AP %pM CSA has inconsistent channel data, disconnecting\n",
1172                                    ifmgd->associated->bssid);
1173                         ieee80211_queue_work(&local->hw,
1174                                              &ifmgd->csa_connection_drop_work);
1175                         return;
1176                 }
1177                 new_chandef = new_vht_chandef;
1178         }
1179
1180         if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1181                                      IEEE80211_CHAN_DISABLED)) {
1182                 sdata_info(sdata,
1183                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1184                            ifmgd->associated->bssid, new_freq,
1185                            new_chandef.width, new_chandef.center_freq1,
1186                            new_chandef.center_freq2);
1187                 ieee80211_queue_work(&local->hw,
1188                                      &ifmgd->csa_connection_drop_work);
1189                 return;
1190         }
1191
1192         ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1193
1194         if (local->use_chanctx) {
1195                 sdata_info(sdata,
1196                            "not handling channel switch with channel contexts\n");
1197                 ieee80211_queue_work(&local->hw,
1198                                      &ifmgd->csa_connection_drop_work);
1199                 return;
1200         }
1201
1202         mutex_lock(&local->chanctx_mtx);
1203         if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1204                 mutex_unlock(&local->chanctx_mtx);
1205                 return;
1206         }
1207         chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1208                                struct ieee80211_chanctx, conf);
1209         if (chanctx->refcount > 1) {
1210                 sdata_info(sdata,
1211                            "channel switch with multiple interfaces on the same channel, disconnecting\n");
1212                 ieee80211_queue_work(&local->hw,
1213                                      &ifmgd->csa_connection_drop_work);
1214                 mutex_unlock(&local->chanctx_mtx);
1215                 return;
1216         }
1217         mutex_unlock(&local->chanctx_mtx);
1218
1219         local->csa_chandef = new_chandef;
1220
1221         if (mode)
1222                 ieee80211_stop_queues_by_reason(&local->hw,
1223                                 IEEE80211_MAX_QUEUE_MAP,
1224                                 IEEE80211_QUEUE_STOP_REASON_CSA);
1225
1226         if (local->ops->channel_switch) {
1227                 /* use driver's channel switch callback */
1228                 struct ieee80211_channel_switch ch_switch = {
1229                         .timestamp = timestamp,
1230                         .block_tx = mode,
1231                         .chandef = new_chandef,
1232                         .count = count,
1233                 };
1234
1235                 drv_channel_switch(local, &ch_switch);
1236                 return;
1237         }
1238
1239         /* channel switch handled in software */
1240         if (count <= 1)
1241                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1242         else
1243                 mod_timer(&ifmgd->chswitch_timer,
1244                           TU_TO_EXP_TIME(count * cbss->beacon_interval));
1245 }
1246
1247 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1248                                        struct ieee80211_channel *channel,
1249                                        const u8 *country_ie, u8 country_ie_len,
1250                                        const u8 *pwr_constr_elem)
1251 {
1252         struct ieee80211_country_ie_triplet *triplet;
1253         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1254         int i, chan_pwr, chan_increment, new_ap_level;
1255         bool have_chan_pwr = false;
1256
1257         /* Invalid IE */
1258         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1259                 return 0;
1260
1261         triplet = (void *)(country_ie + 3);
1262         country_ie_len -= 3;
1263
1264         switch (channel->band) {
1265         default:
1266                 WARN_ON_ONCE(1);
1267                 /* fall through */
1268         case IEEE80211_BAND_2GHZ:
1269         case IEEE80211_BAND_60GHZ:
1270                 chan_increment = 1;
1271                 break;
1272         case IEEE80211_BAND_5GHZ:
1273                 chan_increment = 4;
1274                 break;
1275         }
1276
1277         /* find channel */
1278         while (country_ie_len >= 3) {
1279                 u8 first_channel = triplet->chans.first_channel;
1280
1281                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1282                         goto next;
1283
1284                 for (i = 0; i < triplet->chans.num_channels; i++) {
1285                         if (first_channel + i * chan_increment == chan) {
1286                                 have_chan_pwr = true;
1287                                 chan_pwr = triplet->chans.max_power;
1288                                 break;
1289                         }
1290                 }
1291                 if (have_chan_pwr)
1292                         break;
1293
1294  next:
1295                 triplet++;
1296                 country_ie_len -= 3;
1297         }
1298
1299         if (!have_chan_pwr)
1300                 return 0;
1301
1302         new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1303
1304         if (sdata->ap_power_level == new_ap_level)
1305                 return 0;
1306
1307         sdata_info(sdata,
1308                    "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1309                    new_ap_level, chan_pwr, *pwr_constr_elem,
1310                    sdata->u.mgd.bssid);
1311         sdata->ap_power_level = new_ap_level;
1312         if (__ieee80211_recalc_txpower(sdata))
1313                 return BSS_CHANGED_TXPOWER;
1314         return 0;
1315 }
1316
1317 /* powersave */
1318 static void ieee80211_enable_ps(struct ieee80211_local *local,
1319                                 struct ieee80211_sub_if_data *sdata)
1320 {
1321         struct ieee80211_conf *conf = &local->hw.conf;
1322
1323         /*
1324          * If we are scanning right now then the parameters will
1325          * take effect when scan finishes.
1326          */
1327         if (local->scanning)
1328                 return;
1329
1330         if (conf->dynamic_ps_timeout > 0 &&
1331             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1332                 mod_timer(&local->dynamic_ps_timer, jiffies +
1333                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1334         } else {
1335                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1336                         ieee80211_send_nullfunc(local, sdata, 1);
1337
1338                 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1339                     (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1340                         return;
1341
1342                 conf->flags |= IEEE80211_CONF_PS;
1343                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1344         }
1345 }
1346
1347 static void ieee80211_change_ps(struct ieee80211_local *local)
1348 {
1349         struct ieee80211_conf *conf = &local->hw.conf;
1350
1351         if (local->ps_sdata) {
1352                 ieee80211_enable_ps(local, local->ps_sdata);
1353         } else if (conf->flags & IEEE80211_CONF_PS) {
1354                 conf->flags &= ~IEEE80211_CONF_PS;
1355                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1356                 del_timer_sync(&local->dynamic_ps_timer);
1357                 cancel_work_sync(&local->dynamic_ps_enable_work);
1358         }
1359 }
1360
1361 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1362 {
1363         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1364         struct sta_info *sta = NULL;
1365         bool authorized = false;
1366
1367         if (!mgd->powersave)
1368                 return false;
1369
1370         if (mgd->broken_ap)
1371                 return false;
1372
1373         if (!mgd->associated)
1374                 return false;
1375
1376         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1377                 return false;
1378
1379         if (!mgd->have_beacon)
1380                 return false;
1381
1382         rcu_read_lock();
1383         sta = sta_info_get(sdata, mgd->bssid);
1384         if (sta)
1385                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1386         rcu_read_unlock();
1387
1388         return authorized;
1389 }
1390
1391 /* need to hold RTNL or interface lock */
1392 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1393 {
1394         struct ieee80211_sub_if_data *sdata, *found = NULL;
1395         int count = 0;
1396         int timeout;
1397
1398         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1399                 local->ps_sdata = NULL;
1400                 return;
1401         }
1402
1403         list_for_each_entry(sdata, &local->interfaces, list) {
1404                 if (!ieee80211_sdata_running(sdata))
1405                         continue;
1406                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1407                         /* If an AP vif is found, then disable PS
1408                          * by setting the count to zero thereby setting
1409                          * ps_sdata to NULL.
1410                          */
1411                         count = 0;
1412                         break;
1413                 }
1414                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1415                         continue;
1416                 found = sdata;
1417                 count++;
1418         }
1419
1420         if (count == 1 && ieee80211_powersave_allowed(found)) {
1421                 s32 beaconint_us;
1422
1423                 if (latency < 0)
1424                         latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1425
1426                 beaconint_us = ieee80211_tu_to_usec(
1427                                         found->vif.bss_conf.beacon_int);
1428
1429                 timeout = local->dynamic_ps_forced_timeout;
1430                 if (timeout < 0) {
1431                         /*
1432                          * Go to full PSM if the user configures a very low
1433                          * latency requirement.
1434                          * The 2000 second value is there for compatibility
1435                          * until the PM_QOS_NETWORK_LATENCY is configured
1436                          * with real values.
1437                          */
1438                         if (latency > (1900 * USEC_PER_MSEC) &&
1439                             latency != (2000 * USEC_PER_SEC))
1440                                 timeout = 0;
1441                         else
1442                                 timeout = 100;
1443                 }
1444                 local->hw.conf.dynamic_ps_timeout = timeout;
1445
1446                 if (beaconint_us > latency) {
1447                         local->ps_sdata = NULL;
1448                 } else {
1449                         int maxslp = 1;
1450                         u8 dtimper = found->u.mgd.dtim_period;
1451
1452                         /* If the TIM IE is invalid, pretend the value is 1 */
1453                         if (!dtimper)
1454                                 dtimper = 1;
1455                         else if (dtimper > 1)
1456                                 maxslp = min_t(int, dtimper,
1457                                                     latency / beaconint_us);
1458
1459                         local->hw.conf.max_sleep_period = maxslp;
1460                         local->hw.conf.ps_dtim_period = dtimper;
1461                         local->ps_sdata = found;
1462                 }
1463         } else {
1464                 local->ps_sdata = NULL;
1465         }
1466
1467         ieee80211_change_ps(local);
1468 }
1469
1470 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1471 {
1472         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1473
1474         if (sdata->vif.bss_conf.ps != ps_allowed) {
1475                 sdata->vif.bss_conf.ps = ps_allowed;
1476                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1477         }
1478 }
1479
1480 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1481 {
1482         struct ieee80211_local *local =
1483                 container_of(work, struct ieee80211_local,
1484                              dynamic_ps_disable_work);
1485
1486         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1487                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1488                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1489         }
1490
1491         ieee80211_wake_queues_by_reason(&local->hw,
1492                                         IEEE80211_MAX_QUEUE_MAP,
1493                                         IEEE80211_QUEUE_STOP_REASON_PS);
1494 }
1495
1496 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1497 {
1498         struct ieee80211_local *local =
1499                 container_of(work, struct ieee80211_local,
1500                              dynamic_ps_enable_work);
1501         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1502         struct ieee80211_if_managed *ifmgd;
1503         unsigned long flags;
1504         int q;
1505
1506         /* can only happen when PS was just disabled anyway */
1507         if (!sdata)
1508                 return;
1509
1510         ifmgd = &sdata->u.mgd;
1511
1512         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1513                 return;
1514
1515         if (local->hw.conf.dynamic_ps_timeout > 0) {
1516                 /* don't enter PS if TX frames are pending */
1517                 if (drv_tx_frames_pending(local)) {
1518                         mod_timer(&local->dynamic_ps_timer, jiffies +
1519                                   msecs_to_jiffies(
1520                                   local->hw.conf.dynamic_ps_timeout));
1521                         return;
1522                 }
1523
1524                 /*
1525                  * transmission can be stopped by others which leads to
1526                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1527                  * is not the actual idle state.
1528                  */
1529                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1530                 for (q = 0; q < local->hw.queues; q++) {
1531                         if (local->queue_stop_reasons[q]) {
1532                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1533                                                        flags);
1534                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1535                                           msecs_to_jiffies(
1536                                           local->hw.conf.dynamic_ps_timeout));
1537                                 return;
1538                         }
1539                 }
1540                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1541         }
1542
1543         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1544             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1545                 if (drv_tx_frames_pending(local)) {
1546                         mod_timer(&local->dynamic_ps_timer, jiffies +
1547                                   msecs_to_jiffies(
1548                                   local->hw.conf.dynamic_ps_timeout));
1549                 } else {
1550                         ieee80211_send_nullfunc(local, sdata, 1);
1551                         /* Flush to get the tx status of nullfunc frame */
1552                         ieee80211_flush_queues(local, sdata);
1553                 }
1554         }
1555
1556         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1557               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1558             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1559                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1560                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1561                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1562         }
1563 }
1564
1565 void ieee80211_dynamic_ps_timer(unsigned long data)
1566 {
1567         struct ieee80211_local *local = (void *) data;
1568
1569         if (local->quiescing || local->suspended)
1570                 return;
1571
1572         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1573 }
1574
1575 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1576 {
1577         struct delayed_work *delayed_work =
1578                 container_of(work, struct delayed_work, work);
1579         struct ieee80211_sub_if_data *sdata =
1580                 container_of(delayed_work, struct ieee80211_sub_if_data,
1581                              dfs_cac_timer_work);
1582
1583         ieee80211_vif_release_channel(sdata);
1584
1585         cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1586 }
1587
1588 /* MLME */
1589 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1590                                      struct ieee80211_sub_if_data *sdata,
1591                                      const u8 *wmm_param, size_t wmm_param_len)
1592 {
1593         struct ieee80211_tx_queue_params params;
1594         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1595         size_t left;
1596         int count;
1597         const u8 *pos;
1598         u8 uapsd_queues = 0;
1599
1600         if (!local->ops->conf_tx)
1601                 return false;
1602
1603         if (local->hw.queues < IEEE80211_NUM_ACS)
1604                 return false;
1605
1606         if (!wmm_param)
1607                 return false;
1608
1609         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1610                 return false;
1611
1612         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1613                 uapsd_queues = ifmgd->uapsd_queues;
1614
1615         count = wmm_param[6] & 0x0f;
1616         if (count == ifmgd->wmm_last_param_set)
1617                 return false;
1618         ifmgd->wmm_last_param_set = count;
1619
1620         pos = wmm_param + 8;
1621         left = wmm_param_len - 8;
1622
1623         memset(&params, 0, sizeof(params));
1624
1625         sdata->wmm_acm = 0;
1626         for (; left >= 4; left -= 4, pos += 4) {
1627                 int aci = (pos[0] >> 5) & 0x03;
1628                 int acm = (pos[0] >> 4) & 0x01;
1629                 bool uapsd = false;
1630                 int queue;
1631
1632                 switch (aci) {
1633                 case 1: /* AC_BK */
1634                         queue = 3;
1635                         if (acm)
1636                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1637                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1638                                 uapsd = true;
1639                         break;
1640                 case 2: /* AC_VI */
1641                         queue = 1;
1642                         if (acm)
1643                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1644                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1645                                 uapsd = true;
1646                         break;
1647                 case 3: /* AC_VO */
1648                         queue = 0;
1649                         if (acm)
1650                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1651                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1652                                 uapsd = true;
1653                         break;
1654                 case 0: /* AC_BE */
1655                 default:
1656                         queue = 2;
1657                         if (acm)
1658                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1659                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1660                                 uapsd = true;
1661                         break;
1662                 }
1663
1664                 params.aifs = pos[0] & 0x0f;
1665                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1666                 params.cw_min = ecw2cw(pos[1] & 0x0f);
1667                 params.txop = get_unaligned_le16(pos + 2);
1668                 params.acm = acm;
1669                 params.uapsd = uapsd;
1670
1671                 mlme_dbg(sdata,
1672                          "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1673                          queue, aci, acm,
1674                          params.aifs, params.cw_min, params.cw_max,
1675                          params.txop, params.uapsd);
1676                 sdata->tx_conf[queue] = params;
1677                 if (drv_conf_tx(local, sdata, queue, &params))
1678                         sdata_err(sdata,
1679                                   "failed to set TX queue parameters for queue %d\n",
1680                                   queue);
1681         }
1682
1683         /* enable WMM or activate new settings */
1684         sdata->vif.bss_conf.qos = true;
1685         return true;
1686 }
1687
1688 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1689 {
1690         lockdep_assert_held(&sdata->local->mtx);
1691
1692         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1693         ieee80211_run_deferred_scan(sdata->local);
1694 }
1695
1696 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1697 {
1698         mutex_lock(&sdata->local->mtx);
1699         __ieee80211_stop_poll(sdata);
1700         mutex_unlock(&sdata->local->mtx);
1701 }
1702
1703 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1704                                            u16 capab, bool erp_valid, u8 erp)
1705 {
1706         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1707         u32 changed = 0;
1708         bool use_protection;
1709         bool use_short_preamble;
1710         bool use_short_slot;
1711
1712         if (erp_valid) {
1713                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1714                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1715         } else {
1716                 use_protection = false;
1717                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1718         }
1719
1720         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1721         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1722                 use_short_slot = true;
1723
1724         if (use_protection != bss_conf->use_cts_prot) {
1725                 bss_conf->use_cts_prot = use_protection;
1726                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1727         }
1728
1729         if (use_short_preamble != bss_conf->use_short_preamble) {
1730                 bss_conf->use_short_preamble = use_short_preamble;
1731                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1732         }
1733
1734         if (use_short_slot != bss_conf->use_short_slot) {
1735                 bss_conf->use_short_slot = use_short_slot;
1736                 changed |= BSS_CHANGED_ERP_SLOT;
1737         }
1738
1739         return changed;
1740 }
1741
1742 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1743                                      struct cfg80211_bss *cbss,
1744                                      u32 bss_info_changed)
1745 {
1746         struct ieee80211_bss *bss = (void *)cbss->priv;
1747         struct ieee80211_local *local = sdata->local;
1748         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1749
1750         bss_info_changed |= BSS_CHANGED_ASSOC;
1751         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1752                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1753
1754         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1755                 beacon_loss_count * bss_conf->beacon_int));
1756
1757         sdata->u.mgd.associated = cbss;
1758         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1759
1760         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1761
1762         if (sdata->vif.p2p) {
1763                 const struct cfg80211_bss_ies *ies;
1764
1765                 rcu_read_lock();
1766                 ies = rcu_dereference(cbss->ies);
1767                 if (ies) {
1768                         int ret;
1769
1770                         ret = cfg80211_get_p2p_attr(
1771                                         ies->data, ies->len,
1772                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1773                                         (u8 *) &bss_conf->p2p_noa_attr,
1774                                         sizeof(bss_conf->p2p_noa_attr));
1775                         if (ret >= 2) {
1776                                 sdata->u.mgd.p2p_noa_index =
1777                                         bss_conf->p2p_noa_attr.index;
1778                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1779                         }
1780                 }
1781                 rcu_read_unlock();
1782         }
1783
1784         /* just to be sure */
1785         ieee80211_stop_poll(sdata);
1786
1787         ieee80211_led_assoc(local, 1);
1788
1789         if (sdata->u.mgd.have_beacon) {
1790                 /*
1791                  * If the AP is buggy we may get here with no DTIM period
1792                  * known, so assume it's 1 which is the only safe assumption
1793                  * in that case, although if the TIM IE is broken powersave
1794                  * probably just won't work at all.
1795                  */
1796                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1797                 bss_conf->beacon_rate = bss->beacon_rate;
1798                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1799         } else {
1800                 bss_conf->beacon_rate = NULL;
1801                 bss_conf->dtim_period = 0;
1802         }
1803
1804         bss_conf->assoc = 1;
1805
1806         /* Tell the driver to monitor connection quality (if supported) */
1807         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1808             bss_conf->cqm_rssi_thold)
1809                 bss_info_changed |= BSS_CHANGED_CQM;
1810
1811         /* Enable ARP filtering */
1812         if (bss_conf->arp_addr_cnt)
1813                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1814
1815         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1816
1817         mutex_lock(&local->iflist_mtx);
1818         ieee80211_recalc_ps(local, -1);
1819         mutex_unlock(&local->iflist_mtx);
1820
1821         ieee80211_recalc_smps(sdata);
1822         ieee80211_recalc_ps_vif(sdata);
1823
1824         netif_carrier_on(sdata->dev);
1825 }
1826
1827 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1828                                    u16 stype, u16 reason, bool tx,
1829                                    u8 *frame_buf)
1830 {
1831         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1832         struct ieee80211_local *local = sdata->local;
1833         u32 changed = 0;
1834
1835         sdata_assert_lock(sdata);
1836
1837         if (WARN_ON_ONCE(tx && !frame_buf))
1838                 return;
1839
1840         if (WARN_ON(!ifmgd->associated))
1841                 return;
1842
1843         ieee80211_stop_poll(sdata);
1844
1845         ifmgd->associated = NULL;
1846         netif_carrier_off(sdata->dev);
1847
1848         /*
1849          * if we want to get out of ps before disassoc (why?) we have
1850          * to do it before sending disassoc, as otherwise the null-packet
1851          * won't be valid.
1852          */
1853         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1854                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1855                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1856         }
1857         local->ps_sdata = NULL;
1858
1859         /* disable per-vif ps */
1860         ieee80211_recalc_ps_vif(sdata);
1861
1862         /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1863         if (tx)
1864                 ieee80211_flush_queues(local, sdata);
1865
1866         /* deauthenticate/disassociate now */
1867         if (tx || frame_buf)
1868                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1869                                                reason, tx, frame_buf);
1870
1871         /* flush out frame */
1872         if (tx)
1873                 ieee80211_flush_queues(local, sdata);
1874
1875         /* clear bssid only after building the needed mgmt frames */
1876         memset(ifmgd->bssid, 0, ETH_ALEN);
1877
1878         /* remove AP and TDLS peers */
1879         sta_info_flush_defer(sdata);
1880
1881         /* finally reset all BSS / config parameters */
1882         changed |= ieee80211_reset_erp_info(sdata);
1883
1884         ieee80211_led_assoc(local, 0);
1885         changed |= BSS_CHANGED_ASSOC;
1886         sdata->vif.bss_conf.assoc = false;
1887
1888         ifmgd->p2p_noa_index = -1;
1889         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1890                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1891
1892         /* on the next assoc, re-program HT/VHT parameters */
1893         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1894         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1895         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1896         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1897
1898         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1899
1900         del_timer_sync(&local->dynamic_ps_timer);
1901         cancel_work_sync(&local->dynamic_ps_enable_work);
1902
1903         /* Disable ARP filtering */
1904         if (sdata->vif.bss_conf.arp_addr_cnt)
1905                 changed |= BSS_CHANGED_ARP_FILTER;
1906
1907         sdata->vif.bss_conf.qos = false;
1908         changed |= BSS_CHANGED_QOS;
1909
1910         /* The BSSID (not really interesting) and HT changed */
1911         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1912         ieee80211_bss_info_change_notify(sdata, changed);
1913
1914         /* disassociated - set to defaults now */
1915         ieee80211_set_wmm_default(sdata, false);
1916
1917         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1918         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1919         del_timer_sync(&sdata->u.mgd.timer);
1920         del_timer_sync(&sdata->u.mgd.chswitch_timer);
1921
1922         sdata->vif.bss_conf.dtim_period = 0;
1923         sdata->vif.bss_conf.beacon_rate = NULL;
1924
1925         ifmgd->have_beacon = false;
1926
1927         ifmgd->flags = 0;
1928         ieee80211_vif_release_channel(sdata);
1929 }
1930
1931 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1932                              struct ieee80211_hdr *hdr)
1933 {
1934         /*
1935          * We can postpone the mgd.timer whenever receiving unicast frames
1936          * from AP because we know that the connection is working both ways
1937          * at that time. But multicast frames (and hence also beacons) must
1938          * be ignored here, because we need to trigger the timer during
1939          * data idle periods for sending the periodic probe request to the
1940          * AP we're connected to.
1941          */
1942         if (is_multicast_ether_addr(hdr->addr1))
1943                 return;
1944
1945         ieee80211_sta_reset_conn_monitor(sdata);
1946 }
1947
1948 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1949 {
1950         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1951         struct ieee80211_local *local = sdata->local;
1952
1953         mutex_lock(&local->mtx);
1954         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1955                 goto out;
1956
1957         __ieee80211_stop_poll(sdata);
1958
1959         mutex_lock(&local->iflist_mtx);
1960         ieee80211_recalc_ps(local, -1);
1961         mutex_unlock(&local->iflist_mtx);
1962
1963         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1964                 goto out;
1965
1966         /*
1967          * We've received a probe response, but are not sure whether
1968          * we have or will be receiving any beacons or data, so let's
1969          * schedule the timers again, just in case.
1970          */
1971         ieee80211_sta_reset_beacon_monitor(sdata);
1972
1973         mod_timer(&ifmgd->conn_mon_timer,
1974                   round_jiffies_up(jiffies +
1975                                    IEEE80211_CONNECTION_IDLE_TIME));
1976 out:
1977         mutex_unlock(&local->mtx);
1978 }
1979
1980 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1981                              struct ieee80211_hdr *hdr, bool ack)
1982 {
1983         if (!ieee80211_is_data(hdr->frame_control))
1984             return;
1985
1986         if (ieee80211_is_nullfunc(hdr->frame_control) &&
1987             sdata->u.mgd.probe_send_count > 0) {
1988                 if (ack)
1989                         ieee80211_sta_reset_conn_monitor(sdata);
1990                 else
1991                         sdata->u.mgd.nullfunc_failed = true;
1992                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1993                 return;
1994         }
1995
1996         if (ack)
1997                 ieee80211_sta_reset_conn_monitor(sdata);
1998 }
1999
2000 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2001 {
2002         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2003         const u8 *ssid;
2004         u8 *dst = ifmgd->associated->bssid;
2005         u8 unicast_limit = max(1, max_probe_tries - 3);
2006
2007         /*
2008          * Try sending broadcast probe requests for the last three
2009          * probe requests after the first ones failed since some
2010          * buggy APs only support broadcast probe requests.
2011          */
2012         if (ifmgd->probe_send_count >= unicast_limit)
2013                 dst = NULL;
2014
2015         /*
2016          * When the hardware reports an accurate Tx ACK status, it's
2017          * better to send a nullfunc frame instead of a probe request,
2018          * as it will kick us off the AP quickly if we aren't associated
2019          * anymore. The timeout will be reset if the frame is ACKed by
2020          * the AP.
2021          */
2022         ifmgd->probe_send_count++;
2023
2024         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2025                 ifmgd->nullfunc_failed = false;
2026                 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2027         } else {
2028                 int ssid_len;
2029
2030                 rcu_read_lock();
2031                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2032                 if (WARN_ON_ONCE(ssid == NULL))
2033                         ssid_len = 0;
2034                 else
2035                         ssid_len = ssid[1];
2036
2037                 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2038                                          0, (u32) -1, true, 0,
2039                                          ifmgd->associated->channel, false);
2040                 rcu_read_unlock();
2041         }
2042
2043         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2044         run_again(sdata, ifmgd->probe_timeout);
2045         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2046                 ieee80211_flush_queues(sdata->local, sdata);
2047 }
2048
2049 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2050                                    bool beacon)
2051 {
2052         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2053         bool already = false;
2054
2055         if (!ieee80211_sdata_running(sdata))
2056                 return;
2057
2058         sdata_lock(sdata);
2059
2060         if (!ifmgd->associated)
2061                 goto out;
2062
2063         mutex_lock(&sdata->local->mtx);
2064
2065         if (sdata->local->tmp_channel || sdata->local->scanning) {
2066                 mutex_unlock(&sdata->local->mtx);
2067                 goto out;
2068         }
2069
2070         if (beacon) {
2071                 mlme_dbg_ratelimited(sdata,
2072                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2073                                      beacon_loss_count);
2074
2075                 ieee80211_cqm_rssi_notify(&sdata->vif,
2076                                           NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2077                                           GFP_KERNEL);
2078         }
2079
2080         /*
2081          * The driver/our work has already reported this event or the
2082          * connection monitoring has kicked in and we have already sent
2083          * a probe request. Or maybe the AP died and the driver keeps
2084          * reporting until we disassociate...
2085          *
2086          * In either case we have to ignore the current call to this
2087          * function (except for setting the correct probe reason bit)
2088          * because otherwise we would reset the timer every time and
2089          * never check whether we received a probe response!
2090          */
2091         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2092                 already = true;
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                                 int shift, u32 rate_flags)
2437 {
2438         int i, j;
2439
2440         for (i = 0; i < supp_rates_len; i++) {
2441                 int rate = supp_rates[i] & 0x7f;
2442                 bool is_basic = !!(supp_rates[i] & 0x80);
2443
2444                 if ((rate * 5 * (1 << shift)) > 110)
2445                         *have_higher_than_11mbit = true;
2446
2447                 /*
2448                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2449                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2450                  *
2451                  * Note: Even through the membership selector and the basic
2452                  *       rate flag share the same bit, they are not exactly
2453                  *       the same.
2454                  */
2455                 if (!!(supp_rates[i] & 0x80) &&
2456                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2457                         continue;
2458
2459                 for (j = 0; j < sband->n_bitrates; j++) {
2460                         struct ieee80211_rate *br;
2461                         int brate;
2462
2463                         br = &sband->bitrates[j];
2464                         if ((rate_flags & br->flags) != rate_flags)
2465                                 continue;
2466
2467                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2468                         if (brate == rate) {
2469                                 *rates |= BIT(j);
2470                                 if (is_basic)
2471                                         *basic_rates |= BIT(j);
2472                                 if ((rate * 5) < *min_rate) {
2473                                         *min_rate = rate * 5;
2474                                         *min_rate_index = j;
2475                                 }
2476                                 break;
2477                         }
2478                 }
2479         }
2480 }
2481
2482 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2483                                          bool assoc)
2484 {
2485         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2486
2487         sdata_assert_lock(sdata);
2488
2489         if (!assoc) {
2490                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2491
2492                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2493                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2494                 sdata->u.mgd.flags = 0;
2495                 ieee80211_vif_release_channel(sdata);
2496         }
2497
2498         kfree(assoc_data);
2499         sdata->u.mgd.assoc_data = NULL;
2500 }
2501
2502 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2503                                     struct cfg80211_bss *cbss,
2504                                     struct ieee80211_mgmt *mgmt, size_t len)
2505 {
2506         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2507         struct ieee80211_local *local = sdata->local;
2508         struct ieee80211_supported_band *sband;
2509         struct sta_info *sta;
2510         u8 *pos;
2511         u16 capab_info, aid;
2512         struct ieee802_11_elems elems;
2513         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2514         const struct cfg80211_bss_ies *bss_ies = NULL;
2515         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2516         u32 changed = 0;
2517         int err;
2518         bool ret;
2519
2520         /* AssocResp and ReassocResp have identical structure */
2521
2522         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2523         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2524
2525         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2526                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2527                            aid);
2528         aid &= ~(BIT(15) | BIT(14));
2529
2530         ifmgd->broken_ap = false;
2531
2532         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2533                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2534                            aid);
2535                 aid = 0;
2536                 ifmgd->broken_ap = true;
2537         }
2538
2539         pos = mgmt->u.assoc_resp.variable;
2540         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2541
2542         if (!elems.supp_rates) {
2543                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2544                 return false;
2545         }
2546
2547         ifmgd->aid = aid;
2548
2549         /*
2550          * Some APs are erroneously not including some information in their
2551          * (re)association response frames. Try to recover by using the data
2552          * from the beacon or probe response. This seems to afflict mobile
2553          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2554          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2555          */
2556         if ((assoc_data->wmm && !elems.wmm_param) ||
2557             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2558              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2559             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2560              (!elems.vht_cap_elem || !elems.vht_operation))) {
2561                 const struct cfg80211_bss_ies *ies;
2562                 struct ieee802_11_elems bss_elems;
2563
2564                 rcu_read_lock();
2565                 ies = rcu_dereference(cbss->ies);
2566                 if (ies)
2567                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2568                                           GFP_ATOMIC);
2569                 rcu_read_unlock();
2570                 if (!bss_ies)
2571                         return false;
2572
2573                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2574                                        false, &bss_elems);
2575                 if (assoc_data->wmm &&
2576                     !elems.wmm_param && bss_elems.wmm_param) {
2577                         elems.wmm_param = bss_elems.wmm_param;
2578                         sdata_info(sdata,
2579                                    "AP bug: WMM param missing from AssocResp\n");
2580                 }
2581
2582                 /*
2583                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2584                  * have to include the IEs in the (re)association response.
2585                  */
2586                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2587                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2588                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2589                         sdata_info(sdata,
2590                                    "AP bug: HT capability missing from AssocResp\n");
2591                 }
2592                 if (!elems.ht_operation && bss_elems.ht_operation &&
2593                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2594                         elems.ht_operation = bss_elems.ht_operation;
2595                         sdata_info(sdata,
2596                                    "AP bug: HT operation missing from AssocResp\n");
2597                 }
2598                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2599                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2600                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2601                         sdata_info(sdata,
2602                                    "AP bug: VHT capa missing from AssocResp\n");
2603                 }
2604                 if (!elems.vht_operation && bss_elems.vht_operation &&
2605                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2606                         elems.vht_operation = bss_elems.vht_operation;
2607                         sdata_info(sdata,
2608                                    "AP bug: VHT operation missing from AssocResp\n");
2609                 }
2610         }
2611
2612         /*
2613          * We previously checked these in the beacon/probe response, so
2614          * they should be present here. This is just a safety net.
2615          */
2616         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2617             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2618                 sdata_info(sdata,
2619                            "HT AP is missing WMM params or HT capability/operation\n");
2620                 ret = false;
2621                 goto out;
2622         }
2623
2624         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2625             (!elems.vht_cap_elem || !elems.vht_operation)) {
2626                 sdata_info(sdata,
2627                            "VHT AP is missing VHT capability/operation\n");
2628                 ret = false;
2629                 goto out;
2630         }
2631
2632         mutex_lock(&sdata->local->sta_mtx);
2633         /*
2634          * station info was already allocated and inserted before
2635          * the association and should be available to us
2636          */
2637         sta = sta_info_get(sdata, cbss->bssid);
2638         if (WARN_ON(!sta)) {
2639                 mutex_unlock(&sdata->local->sta_mtx);
2640                 ret = false;
2641                 goto out;
2642         }
2643
2644         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2645
2646         /* Set up internal HT/VHT capabilities */
2647         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2648                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2649                                                   elems.ht_cap_elem, sta);
2650
2651         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2652                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2653                                                     elems.vht_cap_elem, sta);
2654
2655         /*
2656          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2657          * in their association response, so ignore that data for our own
2658          * configuration. If it changed since the last beacon, we'll get the
2659          * next beacon and update then.
2660          */
2661
2662         /*
2663          * If an operating mode notification IE is present, override the
2664          * NSS calculation (that would be done in rate_control_rate_init())
2665          * and use the # of streams from that element.
2666          */
2667         if (elems.opmode_notif &&
2668             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2669                 u8 nss;
2670
2671                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2672                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2673                 nss += 1;
2674                 sta->sta.rx_nss = nss;
2675         }
2676
2677         rate_control_rate_init(sta);
2678
2679         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2680                 set_sta_flag(sta, WLAN_STA_MFP);
2681
2682         if (elems.wmm_param)
2683                 set_sta_flag(sta, WLAN_STA_WME);
2684
2685         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2686         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2687                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2688         if (err) {
2689                 sdata_info(sdata,
2690                            "failed to move station %pM to desired state\n",
2691                            sta->sta.addr);
2692                 WARN_ON(__sta_info_destroy(sta));
2693                 mutex_unlock(&sdata->local->sta_mtx);
2694                 ret = false;
2695                 goto out;
2696         }
2697
2698         mutex_unlock(&sdata->local->sta_mtx);
2699
2700         /*
2701          * Always handle WMM once after association regardless
2702          * of the first value the AP uses. Setting -1 here has
2703          * that effect because the AP values is an unsigned
2704          * 4-bit value.
2705          */
2706         ifmgd->wmm_last_param_set = -1;
2707
2708         if (elems.wmm_param)
2709                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2710                                          elems.wmm_param_len);
2711         else
2712                 ieee80211_set_wmm_default(sdata, false);
2713         changed |= BSS_CHANGED_QOS;
2714
2715         /* set AID and assoc capability,
2716          * ieee80211_set_associated() will tell the driver */
2717         bss_conf->aid = aid;
2718         bss_conf->assoc_capability = capab_info;
2719         ieee80211_set_associated(sdata, cbss, changed);
2720
2721         /*
2722          * If we're using 4-addr mode, let the AP know that we're
2723          * doing so, so that it can create the STA VLAN on its side
2724          */
2725         if (ifmgd->use_4addr)
2726                 ieee80211_send_4addr_nullfunc(local, sdata);
2727
2728         /*
2729          * Start timer to probe the connection to the AP now.
2730          * Also start the timer that will detect beacon loss.
2731          */
2732         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2733         ieee80211_sta_reset_beacon_monitor(sdata);
2734
2735         ret = true;
2736  out:
2737         kfree(bss_ies);
2738         return ret;
2739 }
2740
2741 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2742                                          struct ieee80211_mgmt *mgmt,
2743                                          size_t len)
2744 {
2745         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2746         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2747         u16 capab_info, status_code, aid;
2748         struct ieee802_11_elems elems;
2749         u8 *pos;
2750         bool reassoc;
2751         struct cfg80211_bss *bss;
2752
2753         sdata_assert_lock(sdata);
2754
2755         if (!assoc_data)
2756                 return;
2757         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2758                 return;
2759
2760         /*
2761          * AssocResp and ReassocResp have identical structure, so process both
2762          * of them in this function.
2763          */
2764
2765         if (len < 24 + 6)
2766                 return;
2767
2768         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2769         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2770         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2771         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2772
2773         sdata_info(sdata,
2774                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2775                    reassoc ? "Rea" : "A", mgmt->sa,
2776                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2777
2778         pos = mgmt->u.assoc_resp.variable;
2779         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2780
2781         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2782             elems.timeout_int &&
2783             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2784                 u32 tu, ms;
2785                 tu = le32_to_cpu(elems.timeout_int->value);
2786                 ms = tu * 1024 / 1000;
2787                 sdata_info(sdata,
2788                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2789                            mgmt->sa, tu, ms);
2790                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2791                 assoc_data->timeout_started = true;
2792                 if (ms > IEEE80211_ASSOC_TIMEOUT)
2793                         run_again(sdata, assoc_data->timeout);
2794                 return;
2795         }
2796
2797         bss = assoc_data->bss;
2798
2799         if (status_code != WLAN_STATUS_SUCCESS) {
2800                 sdata_info(sdata, "%pM denied association (code=%d)\n",
2801                            mgmt->sa, status_code);
2802                 ieee80211_destroy_assoc_data(sdata, false);
2803         } else {
2804                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2805                         /* oops -- internal error -- send timeout for now */
2806                         ieee80211_destroy_assoc_data(sdata, false);
2807                         cfg80211_assoc_timeout(sdata->dev, bss);
2808                         return;
2809                 }
2810                 sdata_info(sdata, "associated\n");
2811
2812                 /*
2813                  * destroy assoc_data afterwards, as otherwise an idle
2814                  * recalc after assoc_data is NULL but before associated
2815                  * is set can cause the interface to go idle
2816                  */
2817                 ieee80211_destroy_assoc_data(sdata, true);
2818         }
2819
2820         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2821 }
2822
2823 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2824                                   struct ieee80211_mgmt *mgmt, size_t len,
2825                                   struct ieee80211_rx_status *rx_status,
2826                                   struct ieee802_11_elems *elems)
2827 {
2828         struct ieee80211_local *local = sdata->local;
2829         int freq;
2830         struct ieee80211_bss *bss;
2831         struct ieee80211_channel *channel;
2832
2833         sdata_assert_lock(sdata);
2834
2835         if (elems->ds_params)
2836                 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2837                                                       rx_status->band);
2838         else
2839                 freq = rx_status->freq;
2840
2841         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2842
2843         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2844                 return;
2845
2846         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2847                                         channel);
2848         if (bss) {
2849                 ieee80211_rx_bss_put(local, bss);
2850                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
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_CONNECTION_POLL) {
3053                 mlme_dbg_ratelimited(sdata,
3054                                      "cancelling AP probe due to a received beacon\n");
3055                 ieee80211_reset_ap_probe(sdata);
3056         }
3057
3058         /*
3059          * Push the beacon loss detection into the future since
3060          * we are processing a beacon from the AP just now.
3061          */
3062         ieee80211_sta_reset_beacon_monitor(sdata);
3063
3064         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3065         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3066                                           len - baselen, false, &elems,
3067                                           care_about_ies, ncrc);
3068
3069         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3070                 bool directed_tim = ieee80211_check_tim(elems.tim,
3071                                                         elems.tim_len,
3072                                                         ifmgd->aid);
3073                 if (directed_tim) {
3074                         if (local->hw.conf.dynamic_ps_timeout > 0) {
3075                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3076                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3077                                         ieee80211_hw_config(local,
3078                                                             IEEE80211_CONF_CHANGE_PS);
3079                                 }
3080                                 ieee80211_send_nullfunc(local, sdata, 0);
3081                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
3082                                 local->pspolling = true;
3083
3084                                 /*
3085                                  * Here is assumed that the driver will be
3086                                  * able to send ps-poll frame and receive a
3087                                  * response even though power save mode is
3088                                  * enabled, but some drivers might require
3089                                  * to disable power save here. This needs
3090                                  * to be investigated.
3091                                  */
3092                                 ieee80211_send_pspoll(local, sdata);
3093                         }
3094                 }
3095         }
3096
3097         if (sdata->vif.p2p) {
3098                 struct ieee80211_p2p_noa_attr noa = {};
3099                 int ret;
3100
3101                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3102                                             len - baselen,
3103                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3104                                             (u8 *) &noa, sizeof(noa));
3105                 if (ret >= 2) {
3106                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3107                                 /* valid noa_attr and index changed */
3108                                 sdata->u.mgd.p2p_noa_index = noa.index;
3109                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3110                                 changed |= BSS_CHANGED_P2P_PS;
3111                                 /*
3112                                  * make sure we update all information, the CRC
3113                                  * mechanism doesn't look at P2P attributes.
3114                                  */
3115                                 ifmgd->beacon_crc_valid = false;
3116                         }
3117                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3118                         /* noa_attr not found and we had valid noa_attr before */
3119                         sdata->u.mgd.p2p_noa_index = -1;
3120                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3121                         changed |= BSS_CHANGED_P2P_PS;
3122                         ifmgd->beacon_crc_valid = false;
3123                 }
3124         }
3125
3126         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3127                 return;
3128         ifmgd->beacon_crc = ncrc;
3129         ifmgd->beacon_crc_valid = true;
3130
3131         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3132
3133         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3134                                          &elems, true);
3135
3136         if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3137                                      elems.wmm_param_len))
3138                 changed |= BSS_CHANGED_QOS;
3139
3140         /*
3141          * If we haven't had a beacon before, tell the driver about the
3142          * DTIM period (and beacon timing if desired) now.
3143          */
3144         if (!ifmgd->have_beacon) {
3145                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3146                 if (elems.tim)
3147                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3148                 else
3149                         bss_conf->dtim_period = 1;
3150
3151                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3152                         sdata->vif.bss_conf.sync_tsf =
3153                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3154                         sdata->vif.bss_conf.sync_device_ts =
3155                                 rx_status->device_timestamp;
3156                         if (elems.tim)
3157                                 sdata->vif.bss_conf.sync_dtim_count =
3158                                         elems.tim->dtim_count;
3159                         else
3160                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3161                 }
3162
3163                 changed |= BSS_CHANGED_BEACON_INFO;
3164                 ifmgd->have_beacon = true;
3165
3166                 mutex_lock(&local->iflist_mtx);
3167                 ieee80211_recalc_ps(local, -1);
3168                 mutex_unlock(&local->iflist_mtx);
3169
3170                 ieee80211_recalc_ps_vif(sdata);
3171         }
3172
3173         if (elems.erp_info) {
3174                 erp_valid = true;
3175                 erp_value = elems.erp_info[0];
3176         } else {
3177                 erp_valid = false;
3178         }
3179         changed |= ieee80211_handle_bss_capability(sdata,
3180                         le16_to_cpu(mgmt->u.beacon.capab_info),
3181                         erp_valid, erp_value);
3182
3183         mutex_lock(&local->sta_mtx);
3184         sta = sta_info_get(sdata, bssid);
3185
3186         if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3187                                 elems.vht_operation, bssid, &changed)) {
3188                 mutex_unlock(&local->sta_mtx);
3189                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3190                                        WLAN_REASON_DEAUTH_LEAVING,
3191                                        true, deauth_buf);
3192                 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3193                                       sizeof(deauth_buf));
3194                 return;
3195         }
3196
3197         if (sta && elems.opmode_notif)
3198                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3199                                             rx_status->band, true);
3200         mutex_unlock(&local->sta_mtx);
3201
3202         if (elems.country_elem && elems.pwr_constr_elem &&
3203             mgmt->u.probe_resp.capab_info &
3204                                 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3205                 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3206                                                        elems.country_elem,
3207                                                        elems.country_elem_len,
3208                                                        elems.pwr_constr_elem);
3209
3210         ieee80211_bss_info_change_notify(sdata, changed);
3211 }
3212
3213 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3214                                   struct sk_buff *skb)
3215 {
3216         struct ieee80211_rx_status *rx_status;
3217         struct ieee80211_mgmt *mgmt;
3218         u16 fc;
3219         struct ieee802_11_elems elems;
3220         int ies_len;
3221
3222         rx_status = (struct ieee80211_rx_status *) skb->cb;
3223         mgmt = (struct ieee80211_mgmt *) skb->data;
3224         fc = le16_to_cpu(mgmt->frame_control);
3225
3226         sdata_lock(sdata);
3227
3228         switch (fc & IEEE80211_FCTL_STYPE) {
3229         case IEEE80211_STYPE_BEACON:
3230                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3231                 break;
3232         case IEEE80211_STYPE_PROBE_RESP:
3233                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3234                 break;
3235         case IEEE80211_STYPE_AUTH:
3236                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3237                 break;
3238         case IEEE80211_STYPE_DEAUTH:
3239                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3240                 break;
3241         case IEEE80211_STYPE_DISASSOC:
3242                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3243                 break;
3244         case IEEE80211_STYPE_ASSOC_RESP:
3245         case IEEE80211_STYPE_REASSOC_RESP:
3246                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3247                 break;
3248         case IEEE80211_STYPE_ACTION:
3249                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3250                         ies_len = skb->len -
3251                                   offsetof(struct ieee80211_mgmt,
3252                                            u.action.u.chan_switch.variable);
3253
3254                         if (ies_len < 0)
3255                                 break;
3256
3257                         ieee802_11_parse_elems(
3258                                 mgmt->u.action.u.chan_switch.variable,
3259                                 ies_len, true, &elems);
3260
3261                         if (elems.parse_error)
3262                                 break;
3263
3264                         ieee80211_sta_process_chanswitch(sdata,
3265                                                          rx_status->mactime,
3266                                                          &elems, false);
3267                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3268                         ies_len = skb->len -
3269                                   offsetof(struct ieee80211_mgmt,
3270                                            u.action.u.ext_chan_switch.variable);
3271
3272                         if (ies_len < 0)
3273                                 break;
3274
3275                         ieee802_11_parse_elems(
3276                                 mgmt->u.action.u.ext_chan_switch.variable,
3277                                 ies_len, true, &elems);
3278
3279                         if (elems.parse_error)
3280                                 break;
3281
3282                         /* for the handling code pretend this was also an IE */
3283                         elems.ext_chansw_ie =
3284                                 &mgmt->u.action.u.ext_chan_switch.data;
3285
3286                         ieee80211_sta_process_chanswitch(sdata,
3287                                                          rx_status->mactime,
3288                                                          &elems, false);
3289                 }
3290                 break;
3291         }
3292         sdata_unlock(sdata);
3293 }
3294
3295 static void ieee80211_sta_timer(unsigned long data)
3296 {
3297         struct ieee80211_sub_if_data *sdata =
3298                 (struct ieee80211_sub_if_data *) data;
3299
3300         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3301 }
3302
3303 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3304                                           u8 *bssid, u8 reason, bool tx)
3305 {
3306         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3307
3308         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3309                                tx, frame_buf);
3310
3311         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3312                               IEEE80211_DEAUTH_FRAME_LEN);
3313 }
3314
3315 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3316 {
3317         struct ieee80211_local *local = sdata->local;
3318         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3319         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3320         u32 tx_flags = 0;
3321
3322         sdata_assert_lock(sdata);
3323
3324         if (WARN_ON_ONCE(!auth_data))
3325                 return -EINVAL;
3326
3327         auth_data->tries++;
3328
3329         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3330                 sdata_info(sdata, "authentication with %pM timed out\n",
3331                            auth_data->bss->bssid);
3332
3333                 /*
3334                  * Most likely AP is not in the range so remove the
3335                  * bss struct for that AP.
3336                  */
3337                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3338
3339                 return -ETIMEDOUT;
3340         }
3341
3342         drv_mgd_prepare_tx(local, sdata);
3343
3344         if (auth_data->bss->proberesp_ies) {
3345                 u16 trans = 1;
3346                 u16 status = 0;
3347
3348                 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3349                            auth_data->bss->bssid, auth_data->tries,
3350                            IEEE80211_AUTH_MAX_TRIES);
3351
3352                 auth_data->expected_transaction = 2;
3353
3354                 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3355                         trans = auth_data->sae_trans;
3356                         status = auth_data->sae_status;
3357                         auth_data->expected_transaction = trans;
3358                 }
3359
3360                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3361                         tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3362                                    IEEE80211_TX_INTFL_MLME_CONN_TX;
3363
3364                 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3365                                     auth_data->data, auth_data->data_len,
3366                                     auth_data->bss->bssid,
3367                                     auth_data->bss->bssid, NULL, 0, 0,
3368                                     tx_flags);
3369         } else {
3370                 const u8 *ssidie;
3371
3372                 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3373                            auth_data->bss->bssid, auth_data->tries,
3374                            IEEE80211_AUTH_MAX_TRIES);
3375
3376                 rcu_read_lock();
3377                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3378                 if (!ssidie) {
3379                         rcu_read_unlock();
3380                         return -EINVAL;
3381                 }
3382                 /*
3383                  * Direct probe is sent to broadcast address as some APs
3384                  * will not answer to direct packet in unassociated state.
3385                  */
3386                 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3387                                          NULL, 0, (u32) -1, true, 0,
3388                                          auth_data->bss->channel, false);
3389                 rcu_read_unlock();
3390         }
3391
3392         if (tx_flags == 0) {
3393                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3394                 auth_data->timeout_started = true;
3395                 run_again(sdata, auth_data->timeout);
3396         } else {
3397                 auth_data->timeout =
3398                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3399                 auth_data->timeout_started = true;
3400                 run_again(sdata, auth_data->timeout);
3401         }
3402
3403         return 0;
3404 }
3405
3406 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3407 {
3408         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3409         struct ieee80211_local *local = sdata->local;
3410
3411         sdata_assert_lock(sdata);
3412
3413         assoc_data->tries++;
3414         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3415                 sdata_info(sdata, "association with %pM timed out\n",
3416                            assoc_data->bss->bssid);
3417
3418                 /*
3419                  * Most likely AP is not in the range so remove the
3420                  * bss struct for that AP.
3421                  */
3422                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3423
3424                 return -ETIMEDOUT;
3425         }
3426
3427         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3428                    assoc_data->bss->bssid, assoc_data->tries,
3429                    IEEE80211_ASSOC_MAX_TRIES);
3430         ieee80211_send_assoc(sdata);
3431
3432         if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3433                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3434                 assoc_data->timeout_started = true;
3435                 run_again(sdata, assoc_data->timeout);
3436         } else {
3437                 assoc_data->timeout =
3438                         round_jiffies_up(jiffies +
3439                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3440                 assoc_data->timeout_started = true;
3441                 run_again(sdata, assoc_data->timeout);
3442         }
3443
3444         return 0;
3445 }
3446
3447 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3448                                   __le16 fc, bool acked)
3449 {
3450         struct ieee80211_local *local = sdata->local;
3451
3452         sdata->u.mgd.status_fc = fc;
3453         sdata->u.mgd.status_acked = acked;
3454         sdata->u.mgd.status_received = true;
3455
3456         ieee80211_queue_work(&local->hw, &sdata->work);
3457 }
3458
3459 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3460 {
3461         struct ieee80211_local *local = sdata->local;
3462         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3463
3464         sdata_lock(sdata);
3465
3466         if (ifmgd->status_received) {
3467                 __le16 fc = ifmgd->status_fc;
3468                 bool status_acked = ifmgd->status_acked;
3469
3470                 ifmgd->status_received = false;
3471                 if (ifmgd->auth_data &&
3472                     (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3473                         if (status_acked) {
3474                                 ifmgd->auth_data->timeout =
3475                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3476                                 run_again(sdata, ifmgd->auth_data->timeout);
3477                         } else {
3478                                 ifmgd->auth_data->timeout = jiffies - 1;
3479                         }
3480                         ifmgd->auth_data->timeout_started = true;
3481                 } else if (ifmgd->assoc_data &&
3482                            (ieee80211_is_assoc_req(fc) ||
3483                             ieee80211_is_reassoc_req(fc))) {
3484                         if (status_acked) {
3485                                 ifmgd->assoc_data->timeout =
3486                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3487                                 run_again(sdata, ifmgd->assoc_data->timeout);
3488                         } else {
3489                                 ifmgd->assoc_data->timeout = jiffies - 1;
3490                         }
3491                         ifmgd->assoc_data->timeout_started = true;
3492                 }
3493         }
3494
3495         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3496             time_after(jiffies, ifmgd->auth_data->timeout)) {
3497                 if (ifmgd->auth_data->done) {
3498                         /*
3499                          * ok ... we waited for assoc but userspace didn't,
3500                          * so let's just kill the auth data
3501                          */
3502                         ieee80211_destroy_auth_data(sdata, false);
3503                 } else if (ieee80211_probe_auth(sdata)) {
3504                         u8 bssid[ETH_ALEN];
3505
3506                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3507
3508                         ieee80211_destroy_auth_data(sdata, false);
3509
3510                         cfg80211_auth_timeout(sdata->dev, bssid);
3511                 }
3512         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3513                 run_again(sdata, ifmgd->auth_data->timeout);
3514
3515         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3516             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3517                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3518                     ieee80211_do_assoc(sdata)) {
3519                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3520
3521                         ieee80211_destroy_assoc_data(sdata, false);
3522                         cfg80211_assoc_timeout(sdata->dev, bss);
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_CONNECTION_POLL &&
3528             ifmgd->associated) {
3529                 u8 bssid[ETH_ALEN];
3530                 int max_tries;
3531
3532                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3533
3534                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3535                         max_tries = max_nullfunc_tries;
3536                 else
3537                         max_tries = max_probe_tries;
3538
3539                 /* ACK received for nullfunc probing frame */
3540                 if (!ifmgd->probe_send_count)
3541                         ieee80211_reset_ap_probe(sdata);
3542                 else if (ifmgd->nullfunc_failed) {
3543                         if (ifmgd->probe_send_count < max_tries) {
3544                                 mlme_dbg(sdata,
3545                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3546                                          bssid, ifmgd->probe_send_count,
3547                                          max_tries);
3548                                 ieee80211_mgd_probe_ap_send(sdata);
3549                         } else {
3550                                 mlme_dbg(sdata,
3551                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3552                                          bssid);
3553                                 ieee80211_sta_connection_lost(sdata, bssid,
3554                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3555                                         false);
3556                         }
3557                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3558                         run_again(sdata, ifmgd->probe_timeout);
3559                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3560                         mlme_dbg(sdata,
3561                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3562                                  bssid, probe_wait_ms);
3563                         ieee80211_sta_connection_lost(sdata, bssid,
3564                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3565                 } else if (ifmgd->probe_send_count < max_tries) {
3566                         mlme_dbg(sdata,
3567                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3568                                  bssid, probe_wait_ms,
3569                                  ifmgd->probe_send_count, max_tries);
3570                         ieee80211_mgd_probe_ap_send(sdata);
3571                 } else {
3572                         /*
3573                          * We actually lost the connection ... or did we?
3574                          * Let's make sure!
3575                          */
3576                         wiphy_debug(local->hw.wiphy,
3577                                     "%s: No probe response from AP %pM"
3578                                     " after %dms, disconnecting.\n",
3579                                     sdata->name,
3580                                     bssid, probe_wait_ms);
3581
3582                         ieee80211_sta_connection_lost(sdata, bssid,
3583                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3584                 }
3585         }
3586
3587         sdata_unlock(sdata);
3588 }
3589
3590 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3591 {
3592         struct ieee80211_sub_if_data *sdata =
3593                 (struct ieee80211_sub_if_data *) data;
3594         struct ieee80211_local *local = sdata->local;
3595
3596         if (local->quiescing)
3597                 return;
3598
3599         sdata->u.mgd.connection_loss = false;
3600         ieee80211_queue_work(&sdata->local->hw,
3601                              &sdata->u.mgd.beacon_connection_loss_work);
3602 }
3603
3604 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3605 {
3606         struct ieee80211_sub_if_data *sdata =
3607                 (struct ieee80211_sub_if_data *) data;
3608         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3609         struct ieee80211_local *local = sdata->local;
3610
3611         if (local->quiescing)
3612                 return;
3613
3614         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3615 }
3616
3617 static void ieee80211_sta_monitor_work(struct work_struct *work)
3618 {
3619         struct ieee80211_sub_if_data *sdata =
3620                 container_of(work, struct ieee80211_sub_if_data,
3621                              u.mgd.monitor_work);
3622
3623         ieee80211_mgd_probe_ap(sdata, false);
3624 }
3625
3626 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3627 {
3628         u32 flags;
3629
3630         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3631                 __ieee80211_stop_poll(sdata);
3632
3633                 /* let's probe the connection once */
3634                 flags = sdata->local->hw.flags;
3635                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3636                         ieee80211_queue_work(&sdata->local->hw,
3637                                              &sdata->u.mgd.monitor_work);
3638                 /* and do all the other regular work too */
3639                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3640         }
3641 }
3642
3643 #ifdef CONFIG_PM
3644 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3645 {
3646         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3647
3648         sdata_lock(sdata);
3649         if (!ifmgd->associated) {
3650                 sdata_unlock(sdata);
3651                 return;
3652         }
3653
3654         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3655                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3656                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3657                 ieee80211_sta_connection_lost(sdata,
3658                                               ifmgd->associated->bssid,
3659                                               WLAN_REASON_UNSPECIFIED,
3660                                               true);
3661                 sdata_unlock(sdata);
3662                 return;
3663         }
3664         sdata_unlock(sdata);
3665 }
3666 #endif
3667
3668 /* interface setup */
3669 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3670 {
3671         struct ieee80211_if_managed *ifmgd;
3672
3673         ifmgd = &sdata->u.mgd;
3674         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3675         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3676         INIT_WORK(&ifmgd->beacon_connection_loss_work,
3677                   ieee80211_beacon_connection_loss_work);
3678         INIT_WORK(&ifmgd->csa_connection_drop_work,
3679                   ieee80211_csa_connection_drop_work);
3680         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3681         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3682                     (unsigned long) sdata);
3683         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3684                     (unsigned long) sdata);
3685         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3686                     (unsigned long) sdata);
3687         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3688                     (unsigned long) sdata);
3689
3690         ifmgd->flags = 0;
3691         ifmgd->powersave = sdata->wdev.ps;
3692         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3693         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3694         ifmgd->p2p_noa_index = -1;
3695
3696         if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3697                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3698         else
3699                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3700 }
3701
3702 /* scan finished notification */
3703 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3704 {
3705         struct ieee80211_sub_if_data *sdata;
3706
3707         /* Restart STA timers */
3708         rcu_read_lock();
3709         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3710                 if (ieee80211_sdata_running(sdata))
3711                         ieee80211_restart_sta_timer(sdata);
3712         }
3713         rcu_read_unlock();
3714 }
3715
3716 int ieee80211_max_network_latency(struct notifier_block *nb,
3717                                   unsigned long data, void *dummy)
3718 {
3719         s32 latency_usec = (s32) data;
3720         struct ieee80211_local *local =
3721                 container_of(nb, struct ieee80211_local,
3722                              network_latency_notifier);
3723
3724         mutex_lock(&local->iflist_mtx);
3725         ieee80211_recalc_ps(local, latency_usec);
3726         mutex_unlock(&local->iflist_mtx);
3727
3728         return 0;
3729 }
3730
3731 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3732                                      struct cfg80211_bss *cbss)
3733 {
3734         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3735         const u8 *ht_cap_ie, *vht_cap_ie;
3736         const struct ieee80211_ht_cap *ht_cap;
3737         const struct ieee80211_vht_cap *vht_cap;
3738         u8 chains = 1;
3739
3740         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3741                 return chains;
3742
3743         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3744         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3745                 ht_cap = (void *)(ht_cap_ie + 2);
3746                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3747                 /*
3748                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3749                  *       "Tx Unequal Modulation Supported" fields.
3750                  */
3751         }
3752
3753         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3754                 return chains;
3755
3756         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3757         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3758                 u8 nss;
3759                 u16 tx_mcs_map;
3760
3761                 vht_cap = (void *)(vht_cap_ie + 2);
3762                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3763                 for (nss = 8; nss > 0; nss--) {
3764                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3765                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
3766                                 break;
3767                 }
3768                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3769                 chains = max(chains, nss);
3770         }
3771
3772         return chains;
3773 }
3774
3775 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3776                                   struct cfg80211_bss *cbss)
3777 {
3778         struct ieee80211_local *local = sdata->local;
3779         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3780         const struct ieee80211_ht_operation *ht_oper = NULL;
3781         const struct ieee80211_vht_operation *vht_oper = NULL;
3782         struct ieee80211_supported_band *sband;
3783         struct cfg80211_chan_def chandef;
3784         int ret;
3785
3786         sband = local->hw.wiphy->bands[cbss->channel->band];
3787
3788         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3789                           IEEE80211_STA_DISABLE_80P80MHZ |
3790                           IEEE80211_STA_DISABLE_160MHZ);
3791
3792         rcu_read_lock();
3793
3794         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3795             sband->ht_cap.ht_supported) {
3796                 const u8 *ht_oper_ie, *ht_cap;
3797
3798                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3799                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3800                         ht_oper = (void *)(ht_oper_ie + 2);
3801
3802                 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3803                 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3804                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3805                         ht_oper = NULL;
3806                 }
3807         }
3808
3809         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3810             sband->vht_cap.vht_supported) {
3811                 const u8 *vht_oper_ie, *vht_cap;
3812
3813                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3814                                                    WLAN_EID_VHT_OPERATION);
3815                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3816                         vht_oper = (void *)(vht_oper_ie + 2);
3817                 if (vht_oper && !ht_oper) {
3818                         vht_oper = NULL;
3819                         sdata_info(sdata,
3820                                    "AP advertised VHT without HT, disabling both\n");
3821                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3822                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3823                 }
3824
3825                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3826                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3827                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3828                         vht_oper = NULL;
3829                 }
3830         }
3831
3832         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3833                                                      cbss->channel,
3834                                                      ht_oper, vht_oper,
3835                                                      &chandef, false);
3836
3837         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3838                                       local->rx_chains);
3839
3840         rcu_read_unlock();
3841
3842         /* will change later if needed */
3843         sdata->smps_mode = IEEE80211_SMPS_OFF;
3844
3845         /*
3846          * If this fails (possibly due to channel context sharing
3847          * on incompatible channels, e.g. 80+80 and 160 sharing the
3848          * same control channel) try to use a smaller bandwidth.
3849          */
3850         ret = ieee80211_vif_use_channel(sdata, &chandef,
3851                                         IEEE80211_CHANCTX_SHARED);
3852
3853         /* don't downgrade for 5 and 10 MHz channels, though. */
3854         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3855             chandef.width == NL80211_CHAN_WIDTH_10)
3856                 return ret;
3857
3858         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3859                 ifmgd->flags |= chandef_downgrade(&chandef);
3860                 ret = ieee80211_vif_use_channel(sdata, &chandef,
3861                                                 IEEE80211_CHANCTX_SHARED);
3862         }
3863         return ret;
3864 }
3865
3866 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3867                                      struct cfg80211_bss *cbss, bool assoc)
3868 {
3869         struct ieee80211_local *local = sdata->local;
3870         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3871         struct ieee80211_bss *bss = (void *)cbss->priv;
3872         struct sta_info *new_sta = NULL;
3873         bool have_sta = false;
3874         int err;
3875
3876         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3877                 return -EINVAL;
3878
3879         if (assoc) {
3880                 rcu_read_lock();
3881                 have_sta = sta_info_get(sdata, cbss->bssid);
3882                 rcu_read_unlock();
3883         }
3884
3885         if (!have_sta) {
3886                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3887                 if (!new_sta)
3888                         return -ENOMEM;
3889         }
3890         if (new_sta) {
3891                 u32 rates = 0, basic_rates = 0;
3892                 bool have_higher_than_11mbit;
3893                 int min_rate = INT_MAX, min_rate_index = -1;
3894                 struct ieee80211_chanctx_conf *chanctx_conf;
3895                 struct ieee80211_supported_band *sband;
3896                 const struct cfg80211_bss_ies *ies;
3897                 int shift;
3898                 u32 rate_flags;
3899
3900                 sband = local->hw.wiphy->bands[cbss->channel->band];
3901
3902                 err = ieee80211_prep_channel(sdata, cbss);
3903                 if (err) {
3904                         sta_info_free(local, new_sta);
3905                         return -EINVAL;
3906                 }
3907                 shift = ieee80211_vif_get_shift(&sdata->vif);
3908
3909                 rcu_read_lock();
3910                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3911                 if (WARN_ON(!chanctx_conf)) {
3912                         rcu_read_unlock();
3913                         return -EINVAL;
3914                 }
3915                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3916                 rcu_read_unlock();
3917
3918                 ieee80211_get_rates(sband, bss->supp_rates,
3919                                     bss->supp_rates_len,
3920                                     &rates, &basic_rates,
3921                                     &have_higher_than_11mbit,
3922                                     &min_rate, &min_rate_index,
3923                                     shift, rate_flags);
3924
3925                 /*
3926                  * This used to be a workaround for basic rates missing
3927                  * in the association response frame. Now that we no
3928                  * longer use the basic rates from there, it probably
3929                  * doesn't happen any more, but keep the workaround so
3930                  * in case some *other* APs are buggy in different ways
3931                  * we can connect -- with a warning.
3932                  */
3933                 if (!basic_rates && min_rate_index >= 0) {
3934                         sdata_info(sdata,
3935                                    "No basic rates, using min rate instead\n");
3936                         basic_rates = BIT(min_rate_index);
3937                 }
3938
3939                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3940                 sdata->vif.bss_conf.basic_rates = basic_rates;
3941
3942                 /* cf. IEEE 802.11 9.2.12 */
3943                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3944                     have_higher_than_11mbit)
3945                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3946                 else
3947                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3948
3949                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3950
3951                 /* set timing information */
3952                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3953                 rcu_read_lock();
3954                 ies = rcu_dereference(cbss->beacon_ies);
3955                 if (ies) {
3956                         const u8 *tim_ie;
3957
3958                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3959                         sdata->vif.bss_conf.sync_device_ts =
3960                                 bss->device_ts_beacon;
3961                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3962                                                   ies->data, ies->len);
3963                         if (tim_ie && tim_ie[1] >= 2)
3964                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3965                         else
3966                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3967                 } else if (!(local->hw.flags &
3968                                         IEEE80211_HW_TIMING_BEACON_ONLY)) {
3969                         ies = rcu_dereference(cbss->proberesp_ies);
3970                         /* must be non-NULL since beacon IEs were NULL */
3971                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3972                         sdata->vif.bss_conf.sync_device_ts =
3973                                 bss->device_ts_presp;
3974                         sdata->vif.bss_conf.sync_dtim_count = 0;
3975                 } else {
3976                         sdata->vif.bss_conf.sync_tsf = 0;
3977                         sdata->vif.bss_conf.sync_device_ts = 0;
3978                         sdata->vif.bss_conf.sync_dtim_count = 0;
3979                 }
3980                 rcu_read_unlock();
3981
3982                 /* tell driver about BSSID, basic rates and timing */
3983                 ieee80211_bss_info_change_notify(sdata,
3984                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3985                         BSS_CHANGED_BEACON_INT);
3986
3987                 if (assoc)
3988                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3989
3990                 err = sta_info_insert(new_sta);
3991                 new_sta = NULL;
3992                 if (err) {
3993                         sdata_info(sdata,
3994                                    "failed to insert STA entry for the AP (error %d)\n",
3995                                    err);
3996                         return err;
3997                 }
3998         } else
3999                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4000
4001         return 0;
4002 }
4003
4004 /* config hooks */
4005 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4006                        struct cfg80211_auth_request *req)
4007 {
4008         struct ieee80211_local *local = sdata->local;
4009         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4010         struct ieee80211_mgd_auth_data *auth_data;
4011         u16 auth_alg;
4012         int err;
4013
4014         /* prepare auth data structure */
4015
4016         switch (req->auth_type) {
4017         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4018                 auth_alg = WLAN_AUTH_OPEN;
4019                 break;
4020         case NL80211_AUTHTYPE_SHARED_KEY:
4021                 if (IS_ERR(local->wep_tx_tfm))
4022                         return -EOPNOTSUPP;
4023                 auth_alg = WLAN_AUTH_SHARED_KEY;
4024                 break;
4025         case NL80211_AUTHTYPE_FT:
4026                 auth_alg = WLAN_AUTH_FT;
4027                 break;
4028         case NL80211_AUTHTYPE_NETWORK_EAP:
4029                 auth_alg = WLAN_AUTH_LEAP;
4030                 break;
4031         case NL80211_AUTHTYPE_SAE:
4032                 auth_alg = WLAN_AUTH_SAE;
4033                 break;
4034         default:
4035                 return -EOPNOTSUPP;
4036         }
4037
4038         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4039                             req->ie_len, GFP_KERNEL);
4040         if (!auth_data)
4041                 return -ENOMEM;
4042
4043         auth_data->bss = req->bss;
4044
4045         if (req->sae_data_len >= 4) {
4046                 __le16 *pos = (__le16 *) req->sae_data;
4047                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4048                 auth_data->sae_status = le16_to_cpu(pos[1]);
4049                 memcpy(auth_data->data, req->sae_data + 4,
4050                        req->sae_data_len - 4);
4051                 auth_data->data_len += req->sae_data_len - 4;
4052         }
4053
4054         if (req->ie && req->ie_len) {
4055                 memcpy(&auth_data->data[auth_data->data_len],
4056                        req->ie, req->ie_len);
4057                 auth_data->data_len += req->ie_len;
4058         }
4059
4060         if (req->key && req->key_len) {
4061                 auth_data->key_len = req->key_len;
4062                 auth_data->key_idx = req->key_idx;
4063                 memcpy(auth_data->key, req->key, req->key_len);
4064         }
4065
4066         auth_data->algorithm = auth_alg;
4067
4068         /* try to authenticate/probe */
4069
4070         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4071             ifmgd->assoc_data) {
4072                 err = -EBUSY;
4073                 goto err_free;
4074         }
4075
4076         if (ifmgd->auth_data)
4077                 ieee80211_destroy_auth_data(sdata, false);
4078
4079         /* prep auth_data so we don't go into idle on disassoc */
4080         ifmgd->auth_data = auth_data;
4081
4082         if (ifmgd->associated) {
4083                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4084
4085                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4086                                        WLAN_REASON_UNSPECIFIED,
4087                                        false, frame_buf);
4088
4089                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4090                                       sizeof(frame_buf));
4091         }
4092
4093         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4094
4095         err = ieee80211_prep_connection(sdata, req->bss, false);
4096         if (err)
4097                 goto err_clear;
4098
4099         err = ieee80211_probe_auth(sdata);
4100         if (err) {
4101                 sta_info_destroy_addr(sdata, req->bss->bssid);
4102                 goto err_clear;
4103         }
4104
4105         /* hold our own reference */
4106         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4107         return 0;
4108
4109  err_clear:
4110         memset(ifmgd->bssid, 0, ETH_ALEN);
4111         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4112         ifmgd->auth_data = NULL;
4113  err_free:
4114         kfree(auth_data);
4115         return err;
4116 }
4117
4118 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4119                         struct cfg80211_assoc_request *req)
4120 {
4121         struct ieee80211_local *local = sdata->local;
4122         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4123         struct ieee80211_bss *bss = (void *)req->bss->priv;
4124         struct ieee80211_mgd_assoc_data *assoc_data;
4125         const struct cfg80211_bss_ies *beacon_ies;
4126         struct ieee80211_supported_band *sband;
4127         const u8 *ssidie, *ht_ie, *vht_ie;
4128         int i, err;
4129
4130         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4131         if (!assoc_data)
4132                 return -ENOMEM;
4133
4134         rcu_read_lock();
4135         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4136         if (!ssidie) {
4137                 rcu_read_unlock();
4138                 kfree(assoc_data);
4139                 return -EINVAL;
4140         }
4141         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4142         assoc_data->ssid_len = ssidie[1];
4143         rcu_read_unlock();
4144
4145         if (ifmgd->associated) {
4146                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4147
4148                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4149                                        WLAN_REASON_UNSPECIFIED,
4150                                        false, frame_buf);
4151
4152                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4153                                       sizeof(frame_buf));
4154         }
4155
4156         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4157                 err = -EBUSY;
4158                 goto err_free;
4159         }
4160
4161         if (ifmgd->assoc_data) {
4162                 err = -EBUSY;
4163                 goto err_free;
4164         }
4165
4166         if (ifmgd->auth_data) {
4167                 bool match;
4168
4169                 /* keep sta info, bssid if matching */
4170                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4171                 ieee80211_destroy_auth_data(sdata, match);
4172         }
4173
4174         /* prepare assoc data */
4175
4176         ifmgd->beacon_crc_valid = false;
4177
4178         /*
4179          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4180          * We still associate in non-HT mode (11a/b/g) if any one of these
4181          * ciphers is configured as pairwise.
4182          * We can set this to true for non-11n hardware, that'll be checked
4183          * separately along with the peer capabilities.
4184          */
4185         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4186                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4187                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4188                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4189                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4190                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4191                         netdev_info(sdata->dev,
4192                                     "disabling HT/VHT due to WEP/TKIP use\n");
4193                 }
4194         }
4195
4196         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4197                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4198                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4199         }
4200
4201         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4202                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4203
4204         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4205         sband = local->hw.wiphy->bands[req->bss->channel->band];
4206         if (!sband->ht_cap.ht_supported ||
4207             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4208                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4209                 if (!bss->wmm_used)
4210                         netdev_info(sdata->dev,
4211                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4212         }
4213
4214         /* disable VHT if we don't support it or the AP doesn't use WMM */
4215         if (!sband->vht_cap.vht_supported ||
4216             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4217                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4218                 if (!bss->wmm_used)
4219                         netdev_info(sdata->dev,
4220                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4221         }
4222
4223         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4224         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4225                sizeof(ifmgd->ht_capa_mask));
4226
4227         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4228         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4229                sizeof(ifmgd->vht_capa_mask));
4230
4231         if (req->ie && req->ie_len) {
4232                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4233                 assoc_data->ie_len = req->ie_len;
4234         }
4235
4236         assoc_data->bss = req->bss;
4237
4238         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4239                 if (ifmgd->powersave)
4240                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4241                 else
4242                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4243         } else
4244                 sdata->smps_mode = ifmgd->req_smps;
4245
4246         assoc_data->capability = req->bss->capability;
4247         assoc_data->wmm = bss->wmm_used &&
4248                           (local->hw.queues >= IEEE80211_NUM_ACS);
4249         assoc_data->supp_rates = bss->supp_rates;
4250         assoc_data->supp_rates_len = bss->supp_rates_len;
4251
4252         rcu_read_lock();
4253         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4254         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4255                 assoc_data->ap_ht_param =
4256                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4257         else
4258                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4259         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4260         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4261                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4262                        sizeof(struct ieee80211_vht_cap));
4263         else
4264                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4265         rcu_read_unlock();
4266
4267         if (bss->wmm_used && bss->uapsd_supported &&
4268             (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4269             sdata->wmm_acm != 0xff) {
4270                 assoc_data->uapsd = true;
4271                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4272         } else {
4273                 assoc_data->uapsd = false;
4274                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4275         }
4276
4277         if (req->prev_bssid)
4278                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4279
4280         if (req->use_mfp) {
4281                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4282                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4283         } else {
4284                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4285                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4286         }
4287
4288         if (req->crypto.control_port)
4289                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4290         else
4291                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4292
4293         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4294         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4295
4296         /* kick off associate process */
4297
4298         ifmgd->assoc_data = assoc_data;
4299         ifmgd->dtim_period = 0;
4300         ifmgd->have_beacon = false;
4301
4302         err = ieee80211_prep_connection(sdata, req->bss, true);
4303         if (err)
4304                 goto err_clear;
4305
4306         rcu_read_lock();
4307         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4308
4309         if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4310             !beacon_ies) {
4311                 /*
4312                  * Wait up to one beacon interval ...
4313                  * should this be more if we miss one?
4314                  */
4315                 sdata_info(sdata, "waiting for beacon from %pM\n",
4316                            ifmgd->bssid);
4317                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4318                 assoc_data->timeout_started = true;
4319                 assoc_data->need_beacon = true;
4320         } else if (beacon_ies) {
4321                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4322                                                     beacon_ies->data,
4323                                                     beacon_ies->len);
4324                 u8 dtim_count = 0;
4325
4326                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4327                         const struct ieee80211_tim_ie *tim;
4328                         tim = (void *)(tim_ie + 2);
4329                         ifmgd->dtim_period = tim->dtim_period;
4330                         dtim_count = tim->dtim_count;
4331                 }
4332                 ifmgd->have_beacon = true;
4333                 assoc_data->timeout = jiffies;
4334                 assoc_data->timeout_started = true;
4335
4336                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4337                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4338                         sdata->vif.bss_conf.sync_device_ts =
4339                                 bss->device_ts_beacon;
4340                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4341                 }
4342         } else {
4343                 assoc_data->timeout = jiffies;
4344                 assoc_data->timeout_started = true;
4345         }
4346         rcu_read_unlock();
4347
4348         run_again(sdata, assoc_data->timeout);
4349
4350         if (bss->corrupt_data) {
4351                 char *corrupt_type = "data";
4352                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4353                         if (bss->corrupt_data &
4354                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4355                                 corrupt_type = "beacon and probe response";
4356                         else
4357                                 corrupt_type = "beacon";
4358                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4359                         corrupt_type = "probe response";
4360                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4361                            corrupt_type);
4362         }
4363
4364         return 0;
4365  err_clear:
4366         memset(ifmgd->bssid, 0, ETH_ALEN);
4367         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4368         ifmgd->assoc_data = NULL;
4369  err_free:
4370         kfree(assoc_data);
4371         return err;
4372 }
4373
4374 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4375                          struct cfg80211_deauth_request *req)
4376 {
4377         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4378         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4379         bool tx = !req->local_state_change;
4380         bool report_frame = false;
4381
4382         sdata_info(sdata,
4383                    "deauthenticating from %pM by local choice (reason=%d)\n",
4384                    req->bssid, req->reason_code);
4385
4386         if (ifmgd->auth_data) {
4387                 drv_mgd_prepare_tx(sdata->local, sdata);
4388                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4389                                                IEEE80211_STYPE_DEAUTH,
4390                                                req->reason_code, tx,
4391                                                frame_buf);
4392                 ieee80211_destroy_auth_data(sdata, false);
4393
4394                 report_frame = true;
4395                 goto out;
4396         }
4397
4398         if (ifmgd->associated &&
4399             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4400                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4401                                        req->reason_code, tx, frame_buf);
4402                 report_frame = true;
4403         }
4404
4405  out:
4406         if (report_frame)
4407                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4408                                       IEEE80211_DEAUTH_FRAME_LEN);
4409
4410         return 0;
4411 }
4412
4413 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4414                            struct cfg80211_disassoc_request *req)
4415 {
4416         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4417         u8 bssid[ETH_ALEN];
4418         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4419
4420         /*
4421          * cfg80211 should catch this ... but it's racy since
4422          * we can receive a disassoc frame, process it, hand it
4423          * to cfg80211 while that's in a locked section already
4424          * trying to tell us that the user wants to disconnect.
4425          */
4426         if (ifmgd->associated != req->bss)
4427                 return -ENOLINK;
4428
4429         sdata_info(sdata,
4430                    "disassociating from %pM by local choice (reason=%d)\n",
4431                    req->bss->bssid, req->reason_code);
4432
4433         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4434         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4435                                req->reason_code, !req->local_state_change,
4436                                frame_buf);
4437
4438         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4439                               IEEE80211_DEAUTH_FRAME_LEN);
4440
4441         return 0;
4442 }
4443
4444 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4445 {
4446         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4447
4448         /*
4449          * Make sure some work items will not run after this,
4450          * they will not do anything but might not have been
4451          * cancelled when disconnecting.
4452          */
4453         cancel_work_sync(&ifmgd->monitor_work);
4454         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4455         cancel_work_sync(&ifmgd->request_smps_work);
4456         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4457         cancel_work_sync(&ifmgd->chswitch_work);
4458
4459         sdata_lock(sdata);
4460         if (ifmgd->assoc_data) {
4461                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4462                 ieee80211_destroy_assoc_data(sdata, false);
4463                 cfg80211_assoc_timeout(sdata->dev, bss);
4464         }
4465         if (ifmgd->auth_data)
4466                 ieee80211_destroy_auth_data(sdata, false);
4467         del_timer_sync(&ifmgd->timer);
4468         sdata_unlock(sdata);
4469 }
4470
4471 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4472                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4473                                gfp_t gfp)
4474 {
4475         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4476
4477         trace_api_cqm_rssi_notify(sdata, rssi_event);
4478
4479         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4480 }
4481 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);