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 int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
 493                                       struct ieee80211_supported_band *sband,
 494                                       u32 *rates)
 495 {
 496         int i, j, count;
 497         *rates = 0;
 498         count = 0;
 499         for (i = 0; i < supp_rates_len; i++) {
 500                 int rate = (supp_rates[i] & 0x7F) * 5;
 501
 502                 for (j = 0; j < sband->n_bitrates; j++)
 503                         if (sband->bitrates[j].bitrate == rate) {
 504                                 *rates |= BIT(j);
 505                                 count++;
 506                                 break;
 507                         }
 508         }
 509
 510         return count;
 511 }
 512
 513 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 514                                 struct sk_buff *skb, u8 ap_ht_param,
 515                                 struct ieee80211_supported_band *sband,
 516                                 struct ieee80211_channel *channel,
 517                                 enum ieee80211_smps_mode smps)
 518 {
 519         u8 *pos;
 520         u32 flags = channel->flags;
 521         u16 cap;
 522         struct ieee80211_sta_ht_cap ht_cap;
 523
 524         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 525
 526         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 527         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 528
 529         /* determine capability flags */
 530         cap = ht_cap.cap;
 531
 532         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 533         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 534                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 535                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 536                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 537                 }
 538                 break;
 539         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 540                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 541                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 542                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 543                 }
 544                 break;
 545         }
 546
 547         /*
 548          * If 40 MHz was disabled associate as though we weren't
 549          * capable of 40 MHz -- some broken APs will never fall
 550          * back to trying to transmit in 20 MHz.
 551          */
 552         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 553                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 554                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 555         }
 556
 557         /* set SM PS mode properly */
 558         cap &= ~IEEE80211_HT_CAP_SM_PS;
 559         switch (smps) {
 560         case IEEE80211_SMPS_AUTOMATIC:
 561         case IEEE80211_SMPS_NUM_MODES:
 562                 WARN_ON(1);
 563         case IEEE80211_SMPS_OFF:
 564                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 565                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 566                 break;
 567         case IEEE80211_SMPS_STATIC:
 568                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 569                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 570                 break;
 571         case IEEE80211_SMPS_DYNAMIC:
 572                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 573                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 574                 break;
 575         }
 576
 577         /* reserve and fill IE */
 578         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 579         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 580 }
 581
 582 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 583                                  struct sk_buff *skb,
 584                                  struct ieee80211_supported_band *sband,
 585                                  struct ieee80211_vht_cap *ap_vht_cap)
 586 {
 587         u8 *pos;
 588         u32 cap;
 589         struct ieee80211_sta_vht_cap vht_cap;
 590
 591         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 592
 593         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 594         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 595
 596         /* determine capability flags */
 597         cap = vht_cap.cap;
 598
 599         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 600                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
 601                 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 602         }
 603
 604         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 605                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 606                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 607         }
 608
 609         /*
 610          * Some APs apparently get confused if our capabilities are better
 611          * than theirs, so restrict what we advertise in the assoc request.
 612          */
 613         if (!(ap_vht_cap->vht_cap_info &
 614                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 615                 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
 616
 617         /* reserve and fill IE */
 618         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 619         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 620 }
 621
 622 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 623 {
 624         struct ieee80211_local *local = sdata->local;
 625         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 626         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 627         struct sk_buff *skb;
 628         struct ieee80211_mgmt *mgmt;
 629         u8 *pos, qos_info;
 630         size_t offset = 0, noffset;
 631         int i, count, rates_len, supp_rates_len;
 632         u16 capab;
 633         struct ieee80211_supported_band *sband;
 634         struct ieee80211_chanctx_conf *chanctx_conf;
 635         struct ieee80211_channel *chan;
 636         u32 rates = 0;
 637
 638         sdata_assert_lock(sdata);
 639
 640         rcu_read_lock();
 641         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 642         if (WARN_ON(!chanctx_conf)) {
 643                 rcu_read_unlock();
 644                 return;
 645         }
 646         chan = chanctx_conf->def.chan;
 647         rcu_read_unlock();
 648         sband = local->hw.wiphy->bands[chan->band];
 649
 650         if (assoc_data->supp_rates_len) {
 651                 /*
 652                  * Get all rates supported by the device and the AP as
 653                  * some APs don't like getting a superset of their rates
 654                  * in the association request (e.g. D-Link DAP 1353 in
 655                  * b-only mode)...
 656                  */
 657                 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
 658                                                        assoc_data->supp_rates_len,
 659                                                        sband, &rates);
 660         } else {
 661                 /*
 662                  * In case AP not provide any supported rates information
 663                  * before association, we send information element(s) with
 664                  * all rates that we support.
 665                  */
 666                 rates = ~0;
 667                 rates_len = sband->n_bitrates;
 668         }
 669
 670         skb = alloc_skb(local->hw.extra_tx_headroom +
 671                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 672                         2 + assoc_data->ssid_len + /* SSID */
 673                         4 + rates_len + /* (extended) rates */
 674                         4 + /* power capability */
 675                         2 + 2 * sband->n_channels + /* supported channels */
 676                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 677                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 678                         assoc_data->ie_len + /* extra IEs */
 679                         9, /* WMM */
 680                         GFP_KERNEL);
 681         if (!skb)
 682                 return;
 683
 684         skb_reserve(skb, local->hw.extra_tx_headroom);
 685
 686         capab = WLAN_CAPABILITY_ESS;
 687
 688         if (sband->band == IEEE80211_BAND_2GHZ) {
 689                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 690                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 691                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 692                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 693         }
 694
 695         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 696                 capab |= WLAN_CAPABILITY_PRIVACY;
 697
 698         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 699             (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 700                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 701
 702         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 703         memset(mgmt, 0, 24);
 704         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 705         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 706         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 707
 708         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 709                 skb_put(skb, 10);
 710                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 711                                                   IEEE80211_STYPE_REASSOC_REQ);
 712                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 713                 mgmt->u.reassoc_req.listen_interval =
 714                                 cpu_to_le16(local->hw.conf.listen_interval);
 715                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 716                        ETH_ALEN);
 717         } else {
 718                 skb_put(skb, 4);
 719                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 720                                                   IEEE80211_STYPE_ASSOC_REQ);
 721                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 722                 mgmt->u.assoc_req.listen_interval =
 723                                 cpu_to_le16(local->hw.conf.listen_interval);
 724         }
 725
 726         /* SSID */
 727         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 728         *pos++ = WLAN_EID_SSID;
 729         *pos++ = assoc_data->ssid_len;
 730         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 731
 732         /* add all rates which were marked to be used above */
 733         supp_rates_len = rates_len;
 734         if (supp_rates_len > 8)
 735                 supp_rates_len = 8;
 736
 737         pos = skb_put(skb, supp_rates_len + 2);
 738         *pos++ = WLAN_EID_SUPP_RATES;
 739         *pos++ = supp_rates_len;
 740
 741         count = 0;
 742         for (i = 0; i < sband->n_bitrates; i++) {
 743                 if (BIT(i) & rates) {
 744                         int rate = sband->bitrates[i].bitrate;
 745                         *pos++ = (u8) (rate / 5);
 746                         if (++count == 8)
 747                                 break;
 748                 }
 749         }
 750
 751         if (rates_len > count) {
 752                 pos = skb_put(skb, rates_len - count + 2);
 753                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 754                 *pos++ = rates_len - count;
 755
 756                 for (i++; i < sband->n_bitrates; i++) {
 757                         if (BIT(i) & rates) {
 758                                 int rate = sband->bitrates[i].bitrate;
 759                                 *pos++ = (u8) (rate / 5);
 760                         }
 761                 }
 762         }
 763
 764         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 765                 /* 1. power capabilities */
 766                 pos = skb_put(skb, 4);
 767                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 768                 *pos++ = 2;
 769                 *pos++ = 0; /* min tx power */
 770                 *pos++ = chan->max_power; /* max tx power */
 771
 772                 /* 2. supported channels */
 773                 /* TODO: get this in reg domain format */
 774                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 775                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 776                 *pos++ = 2 * sband->n_channels;
 777                 for (i = 0; i < sband->n_channels; i++) {
 778                         *pos++ = ieee80211_frequency_to_channel(
 779                                         sband->channels[i].center_freq);
 780                         *pos++ = 1; /* one channel in the subband*/
 781                 }
 782         }
 783
 784         /* if present, add any custom IEs that go before HT */
 785         if (assoc_data->ie_len && assoc_data->ie) {
 786                 static const u8 before_ht[] = {
 787                         WLAN_EID_SSID,
 788                         WLAN_EID_SUPP_RATES,
 789                         WLAN_EID_EXT_SUPP_RATES,
 790                         WLAN_EID_PWR_CAPABILITY,
 791                         WLAN_EID_SUPPORTED_CHANNELS,
 792                         WLAN_EID_RSN,
 793                         WLAN_EID_QOS_CAPA,
 794                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 795                         WLAN_EID_MOBILITY_DOMAIN,
 796                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 797                 };
 798                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 799                                              before_ht, ARRAY_SIZE(before_ht),
 800                                              offset);
 801                 pos = skb_put(skb, noffset - offset);
 802                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 803                 offset = noffset;
 804         }
 805
 806         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 807                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 808                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 809
 810         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 811                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 812                                     sband, chan, sdata->smps_mode);
 813
 814         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 815                 ieee80211_add_vht_ie(sdata, skb, sband,
 816                                      &assoc_data->ap_vht_cap);
 817
 818         /* if present, add any custom non-vendor IEs that go after HT */
 819         if (assoc_data->ie_len && assoc_data->ie) {
 820                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 821                                                     assoc_data->ie_len,
 822                                                     offset);
 823                 pos = skb_put(skb, noffset - offset);
 824                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 825                 offset = noffset;
 826         }
 827
 828         if (assoc_data->wmm) {
 829                 if (assoc_data->uapsd) {
 830                         qos_info = ifmgd->uapsd_queues;
 831                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 832                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 833                 } else {
 834                         qos_info = 0;
 835                 }
 836
 837                 pos = skb_put(skb, 9);
 838                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 839                 *pos++ = 7; /* len */
 840                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 841                 *pos++ = 0x50;
 842                 *pos++ = 0xf2;
 843                 *pos++ = 2; /* WME */
 844                 *pos++ = 0; /* WME info */
 845                 *pos++ = 1; /* WME ver */
 846                 *pos++ = qos_info;
 847         }
 848
 849         /* add any remaining custom (i.e. vendor specific here) IEs */
 850         if (assoc_data->ie_len && assoc_data->ie) {
 851                 noffset = assoc_data->ie_len;
 852                 pos = skb_put(skb, noffset - offset);
 853                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 854         }
 855
 856         drv_mgd_prepare_tx(local, sdata);
 857
 858         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 859         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 860                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 861                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 862         ieee80211_tx_skb(sdata, skb);
 863 }
 864
 865 void ieee80211_send_pspoll(struct ieee80211_local *local,
 866                            struct ieee80211_sub_if_data *sdata)
 867 {
 868         struct ieee80211_pspoll *pspoll;
 869         struct sk_buff *skb;
 870
 871         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 872         if (!skb)
 873                 return;
 874
 875         pspoll = (struct ieee80211_pspoll *) skb->data;
 876         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 877
 878         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 879         ieee80211_tx_skb(sdata, skb);
 880 }
 881
 882 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 883                              struct ieee80211_sub_if_data *sdata,
 884                              int powersave)
 885 {
 886         struct sk_buff *skb;
 887         struct ieee80211_hdr_3addr *nullfunc;
 888         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 889
 890         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 891         if (!skb)
 892                 return;
 893
 894         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 895         if (powersave)
 896                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 897
 898         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 899                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 900
 901         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 902                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 903
 904         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
 905                             IEEE80211_STA_CONNECTION_POLL))
 906                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 907
 908         ieee80211_tx_skb(sdata, skb);
 909 }
 910
 911 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 912                                           struct ieee80211_sub_if_data *sdata)
 913 {
 914         struct sk_buff *skb;
 915         struct ieee80211_hdr *nullfunc;
 916         __le16 fc;
 917
 918         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 919                 return;
 920
 921         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 922         if (!skb)
 923                 return;
 924
 925         skb_reserve(skb, local->hw.extra_tx_headroom);
 926
 927         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 928         memset(nullfunc, 0, 30);
 929         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 930                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 931         nullfunc->frame_control = fc;
 932         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 933         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 934         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 935         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 936
 937         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 938         ieee80211_tx_skb(sdata, skb);
 939 }
 940
 941 /* spectrum management related things */
 942 static void ieee80211_chswitch_work(struct work_struct *work)
 943 {
 944         struct ieee80211_sub_if_data *sdata =
 945                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 946         struct ieee80211_local *local = sdata->local;
 947         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 948
 949         if (!ieee80211_sdata_running(sdata))
 950                 return;
 951
 952         sdata_lock(sdata);
 953         if (!ifmgd->associated)
 954                 goto out;
 955
 956         local->_oper_chandef = local->csa_chandef;
 957
 958         if (!local->ops->channel_switch) {
 959                 /* call "hw_config" only if doing sw channel switch */
 960                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
 961         } else {
 962                 /* update the device channel directly */
 963                 local->hw.conf.chandef = local->_oper_chandef;
 964         }
 965
 966         /* XXX: shouldn't really modify cfg80211-owned data! */
 967         ifmgd->associated->channel = local->_oper_chandef.chan;
 968
 969         /* XXX: wait for a beacon first? */
 970         ieee80211_wake_queues_by_reason(&local->hw,
 971                                         IEEE80211_MAX_QUEUE_MAP,
 972                                         IEEE80211_QUEUE_STOP_REASON_CSA);
 973  out:
 974         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
 975         sdata_unlock(sdata);
 976 }
 977
 978 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
 979 {
 980         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 981         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 982
 983         trace_api_chswitch_done(sdata, success);
 984         if (!success) {
 985                 sdata_info(sdata,
 986                            "driver channel switch failed, disconnecting\n");
 987                 ieee80211_queue_work(&sdata->local->hw,
 988                                      &ifmgd->csa_connection_drop_work);
 989         } else {
 990                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
 991         }
 992 }
 993 EXPORT_SYMBOL(ieee80211_chswitch_done);
 994
 995 static void ieee80211_chswitch_timer(unsigned long data)
 996 {
 997         struct ieee80211_sub_if_data *sdata =
 998                 (struct ieee80211_sub_if_data *) data;
 999
1000         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1001 }
1002
1003 static void
1004 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1005                                  u64 timestamp, struct ieee802_11_elems *elems,
1006                                  bool beacon)
1007 {
1008         struct ieee80211_local *local = sdata->local;
1009         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1010         struct cfg80211_bss *cbss = ifmgd->associated;
1011         struct ieee80211_bss *bss;
1012         struct ieee80211_chanctx *chanctx;
1013         enum ieee80211_band new_band;
1014         int new_freq;
1015         u8 new_chan_no;
1016         u8 count;
1017         u8 mode;
1018         struct ieee80211_channel *new_chan;
1019         struct cfg80211_chan_def new_chandef = {};
1020         struct cfg80211_chan_def new_vht_chandef = {};
1021         const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1022         const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1023         const struct ieee80211_ht_operation *ht_oper;
1024         int secondary_channel_offset = -1;
1025
1026         sdata_assert_lock(sdata);
1027
1028         if (!cbss)
1029                 return;
1030
1031         if (local->scanning)
1032                 return;
1033
1034         /* disregard subsequent announcements if we are already processing */
1035         if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1036                 return;
1037
1038         sec_chan_offs = elems->sec_chan_offs;
1039         wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
1040         ht_oper = elems->ht_operation;
1041
1042         if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1043                             IEEE80211_STA_DISABLE_40MHZ)) {
1044                 sec_chan_offs = NULL;
1045                 wide_bw_chansw_ie = NULL;
1046                 /* only used for bandwidth here */
1047                 ht_oper = NULL;
1048         }
1049
1050         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1051                 wide_bw_chansw_ie = NULL;
1052
1053         if (elems->ext_chansw_ie) {
1054                 if (!ieee80211_operating_class_to_band(
1055                                 elems->ext_chansw_ie->new_operating_class,
1056                                 &new_band)) {
1057                         sdata_info(sdata,
1058                                    "cannot understand ECSA IE operating class %d, disconnecting\n",
1059                                    elems->ext_chansw_ie->new_operating_class);
1060                         ieee80211_queue_work(&local->hw,
1061                                              &ifmgd->csa_connection_drop_work);
1062                 }
1063                 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1064                 count = elems->ext_chansw_ie->count;
1065                 mode = elems->ext_chansw_ie->mode;
1066         } else if (elems->ch_switch_ie) {
1067                 new_band = cbss->channel->band;
1068                 new_chan_no = elems->ch_switch_ie->new_ch_num;
1069                 count = elems->ch_switch_ie->count;
1070                 mode = elems->ch_switch_ie->mode;
1071         } else {
1072                 /* nothing here we understand */
1073                 return;
1074         }
1075
1076         bss = (void *)cbss->priv;
1077
1078         new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
1079         new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1080         if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
1081                 sdata_info(sdata,
1082                            "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1083                            ifmgd->associated->bssid, new_freq);
1084                 ieee80211_queue_work(&local->hw,
1085                                      &ifmgd->csa_connection_drop_work);
1086                 return;
1087         }
1088
1089         if (!beacon && sec_chan_offs) {
1090                 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
1091         } else if (beacon && ht_oper) {
1092                 secondary_channel_offset =
1093                         ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
1094         } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
1095                 /*
1096                  * If it's not a beacon, HT is enabled and the IE not present,
1097                  * it's 20 MHz, 802.11-2012 8.5.2.6:
1098                  *      This element [the Secondary Channel Offset Element] is
1099                  *      present when switching to a 40 MHz channel. It may be
1100                  *      present when switching to a 20 MHz channel (in which
1101                  *      case the secondary channel offset is set to SCN).
1102                  */
1103                 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1104         }
1105
1106         switch (secondary_channel_offset) {
1107         default:
1108                 /* secondary_channel_offset was present but is invalid */
1109         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1110                 cfg80211_chandef_create(&new_chandef, new_chan,
1111                                         NL80211_CHAN_HT20);
1112                 break;
1113         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1114                 cfg80211_chandef_create(&new_chandef, new_chan,
1115                                         NL80211_CHAN_HT40PLUS);
1116                 break;
1117         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1118                 cfg80211_chandef_create(&new_chandef, new_chan,
1119                                         NL80211_CHAN_HT40MINUS);
1120                 break;
1121         case -1:
1122                 cfg80211_chandef_create(&new_chandef, new_chan,
1123                                         NL80211_CHAN_NO_HT);
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_BEACON_POLL |
1377                           IEEE80211_STA_CONNECTION_POLL))
1378                 return false;
1379
1380         if (!mgd->have_beacon)
1381                 return false;
1382
1383         rcu_read_lock();
1384         sta = sta_info_get(sdata, mgd->bssid);
1385         if (sta)
1386                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1387         rcu_read_unlock();
1388
1389         return authorized;
1390 }
1391
1392 /* need to hold RTNL or interface lock */
1393 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1394 {
1395         struct ieee80211_sub_if_data *sdata, *found = NULL;
1396         int count = 0;
1397         int timeout;
1398
1399         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1400                 local->ps_sdata = NULL;
1401                 return;
1402         }
1403
1404         list_for_each_entry(sdata, &local->interfaces, list) {
1405                 if (!ieee80211_sdata_running(sdata))
1406                         continue;
1407                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1408                         /* If an AP vif is found, then disable PS
1409                          * by setting the count to zero thereby setting
1410                          * ps_sdata to NULL.
1411                          */
1412                         count = 0;
1413                         break;
1414                 }
1415                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1416                         continue;
1417                 found = sdata;
1418                 count++;
1419         }
1420
1421         if (count == 1 && ieee80211_powersave_allowed(found)) {
1422                 s32 beaconint_us;
1423
1424                 if (latency < 0)
1425                         latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1426
1427                 beaconint_us = ieee80211_tu_to_usec(
1428                                         found->vif.bss_conf.beacon_int);
1429
1430                 timeout = local->dynamic_ps_forced_timeout;
1431                 if (timeout < 0) {
1432                         /*
1433                          * Go to full PSM if the user configures a very low
1434                          * latency requirement.
1435                          * The 2000 second value is there for compatibility
1436                          * until the PM_QOS_NETWORK_LATENCY is configured
1437                          * with real values.
1438                          */
1439                         if (latency > (1900 * USEC_PER_MSEC) &&
1440                             latency != (2000 * USEC_PER_SEC))
1441                                 timeout = 0;
1442                         else
1443                                 timeout = 100;
1444                 }
1445                 local->hw.conf.dynamic_ps_timeout = timeout;
1446
1447                 if (beaconint_us > latency) {
1448                         local->ps_sdata = NULL;
1449                 } else {
1450                         int maxslp = 1;
1451                         u8 dtimper = found->u.mgd.dtim_period;
1452
1453                         /* If the TIM IE is invalid, pretend the value is 1 */
1454                         if (!dtimper)
1455                                 dtimper = 1;
1456                         else if (dtimper > 1)
1457                                 maxslp = min_t(int, dtimper,
1458                                                     latency / beaconint_us);
1459
1460                         local->hw.conf.max_sleep_period = maxslp;
1461                         local->hw.conf.ps_dtim_period = dtimper;
1462                         local->ps_sdata = found;
1463                 }
1464         } else {
1465                 local->ps_sdata = NULL;
1466         }
1467
1468         ieee80211_change_ps(local);
1469 }
1470
1471 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1472 {
1473         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1474
1475         if (sdata->vif.bss_conf.ps != ps_allowed) {
1476                 sdata->vif.bss_conf.ps = ps_allowed;
1477                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1478         }
1479 }
1480
1481 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1482 {
1483         struct ieee80211_local *local =
1484                 container_of(work, struct ieee80211_local,
1485                              dynamic_ps_disable_work);
1486
1487         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1488                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1489                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1490         }
1491
1492         ieee80211_wake_queues_by_reason(&local->hw,
1493                                         IEEE80211_MAX_QUEUE_MAP,
1494                                         IEEE80211_QUEUE_STOP_REASON_PS);
1495 }
1496
1497 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1498 {
1499         struct ieee80211_local *local =
1500                 container_of(work, struct ieee80211_local,
1501                              dynamic_ps_enable_work);
1502         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1503         struct ieee80211_if_managed *ifmgd;
1504         unsigned long flags;
1505         int q;
1506
1507         /* can only happen when PS was just disabled anyway */
1508         if (!sdata)
1509                 return;
1510
1511         ifmgd = &sdata->u.mgd;
1512
1513         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1514                 return;
1515
1516         if (local->hw.conf.dynamic_ps_timeout > 0) {
1517                 /* don't enter PS if TX frames are pending */
1518                 if (drv_tx_frames_pending(local)) {
1519                         mod_timer(&local->dynamic_ps_timer, jiffies +
1520                                   msecs_to_jiffies(
1521                                   local->hw.conf.dynamic_ps_timeout));
1522                         return;
1523                 }
1524
1525                 /*
1526                  * transmission can be stopped by others which leads to
1527                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1528                  * is not the actual idle state.
1529                  */
1530                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1531                 for (q = 0; q < local->hw.queues; q++) {
1532                         if (local->queue_stop_reasons[q]) {
1533                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1534                                                        flags);
1535                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1536                                           msecs_to_jiffies(
1537                                           local->hw.conf.dynamic_ps_timeout));
1538                                 return;
1539                         }
1540                 }
1541                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1542         }
1543
1544         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1545             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1546                 if (drv_tx_frames_pending(local)) {
1547                         mod_timer(&local->dynamic_ps_timer, jiffies +
1548                                   msecs_to_jiffies(
1549                                   local->hw.conf.dynamic_ps_timeout));
1550                 } else {
1551                         ieee80211_send_nullfunc(local, sdata, 1);
1552                         /* Flush to get the tx status of nullfunc frame */
1553                         ieee80211_flush_queues(local, sdata);
1554                 }
1555         }
1556
1557         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1558               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1559             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1560                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1561                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1562                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1563         }
1564 }
1565
1566 void ieee80211_dynamic_ps_timer(unsigned long data)
1567 {
1568         struct ieee80211_local *local = (void *) data;
1569
1570         if (local->quiescing || local->suspended)
1571                 return;
1572
1573         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1574 }
1575
1576 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1577 {
1578         struct delayed_work *delayed_work =
1579                 container_of(work, struct delayed_work, work);
1580         struct ieee80211_sub_if_data *sdata =
1581                 container_of(delayed_work, struct ieee80211_sub_if_data,
1582                              dfs_cac_timer_work);
1583
1584         ieee80211_vif_release_channel(sdata);
1585
1586         cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1587 }
1588
1589 /* MLME */
1590 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1591                                      struct ieee80211_sub_if_data *sdata,
1592                                      const u8 *wmm_param, size_t wmm_param_len)
1593 {
1594         struct ieee80211_tx_queue_params params;
1595         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1596         size_t left;
1597         int count;
1598         const u8 *pos;
1599         u8 uapsd_queues = 0;
1600
1601         if (!local->ops->conf_tx)
1602                 return false;
1603
1604         if (local->hw.queues < IEEE80211_NUM_ACS)
1605                 return false;
1606
1607         if (!wmm_param)
1608                 return false;
1609
1610         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1611                 return false;
1612
1613         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1614                 uapsd_queues = ifmgd->uapsd_queues;
1615
1616         count = wmm_param[6] & 0x0f;
1617         if (count == ifmgd->wmm_last_param_set)
1618                 return false;
1619         ifmgd->wmm_last_param_set = count;
1620
1621         pos = wmm_param + 8;
1622         left = wmm_param_len - 8;
1623
1624         memset(&params, 0, sizeof(params));
1625
1626         sdata->wmm_acm = 0;
1627         for (; left >= 4; left -= 4, pos += 4) {
1628                 int aci = (pos[0] >> 5) & 0x03;
1629                 int acm = (pos[0] >> 4) & 0x01;
1630                 bool uapsd = false;
1631                 int queue;
1632
1633                 switch (aci) {
1634                 case 1: /* AC_BK */
1635                         queue = 3;
1636                         if (acm)
1637                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1638                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1639                                 uapsd = true;
1640                         break;
1641                 case 2: /* AC_VI */
1642                         queue = 1;
1643                         if (acm)
1644                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1645                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1646                                 uapsd = true;
1647                         break;
1648                 case 3: /* AC_VO */
1649                         queue = 0;
1650                         if (acm)
1651                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1652                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1653                                 uapsd = true;
1654                         break;
1655                 case 0: /* AC_BE */
1656                 default:
1657                         queue = 2;
1658                         if (acm)
1659                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1660                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1661                                 uapsd = true;
1662                         break;
1663                 }
1664
1665                 params.aifs = pos[0] & 0x0f;
1666                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1667                 params.cw_min = ecw2cw(pos[1] & 0x0f);
1668                 params.txop = get_unaligned_le16(pos + 2);
1669                 params.acm = acm;
1670                 params.uapsd = uapsd;
1671
1672                 mlme_dbg(sdata,
1673                          "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1674                          queue, aci, acm,
1675                          params.aifs, params.cw_min, params.cw_max,
1676                          params.txop, params.uapsd);
1677                 sdata->tx_conf[queue] = params;
1678                 if (drv_conf_tx(local, sdata, queue, &params))
1679                         sdata_err(sdata,
1680                                   "failed to set TX queue parameters for queue %d\n",
1681                                   queue);
1682         }
1683
1684         /* enable WMM or activate new settings */
1685         sdata->vif.bss_conf.qos = true;
1686         return true;
1687 }
1688
1689 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1690 {
1691         lockdep_assert_held(&sdata->local->mtx);
1692
1693         sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1694                                 IEEE80211_STA_BEACON_POLL);
1695         ieee80211_run_deferred_scan(sdata->local);
1696 }
1697
1698 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1699 {
1700         mutex_lock(&sdata->local->mtx);
1701         __ieee80211_stop_poll(sdata);
1702         mutex_unlock(&sdata->local->mtx);
1703 }
1704
1705 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1706                                            u16 capab, bool erp_valid, u8 erp)
1707 {
1708         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1709         u32 changed = 0;
1710         bool use_protection;
1711         bool use_short_preamble;
1712         bool use_short_slot;
1713
1714         if (erp_valid) {
1715                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1716                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1717         } else {
1718                 use_protection = false;
1719                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1720         }
1721
1722         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1723         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1724                 use_short_slot = true;
1725
1726         if (use_protection != bss_conf->use_cts_prot) {
1727                 bss_conf->use_cts_prot = use_protection;
1728                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1729         }
1730
1731         if (use_short_preamble != bss_conf->use_short_preamble) {
1732                 bss_conf->use_short_preamble = use_short_preamble;
1733                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1734         }
1735
1736         if (use_short_slot != bss_conf->use_short_slot) {
1737                 bss_conf->use_short_slot = use_short_slot;
1738                 changed |= BSS_CHANGED_ERP_SLOT;
1739         }
1740
1741         return changed;
1742 }
1743
1744 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1745                                      struct cfg80211_bss *cbss,
1746                                      u32 bss_info_changed)
1747 {
1748         struct ieee80211_bss *bss = (void *)cbss->priv;
1749         struct ieee80211_local *local = sdata->local;
1750         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1751
1752         bss_info_changed |= BSS_CHANGED_ASSOC;
1753         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1754                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1755
1756         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1757                 beacon_loss_count * bss_conf->beacon_int));
1758
1759         sdata->u.mgd.associated = cbss;
1760         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1761
1762         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1763
1764         if (sdata->vif.p2p) {
1765                 const struct cfg80211_bss_ies *ies;
1766
1767                 rcu_read_lock();
1768                 ies = rcu_dereference(cbss->ies);
1769                 if (ies) {
1770                         int ret;
1771
1772                         ret = cfg80211_get_p2p_attr(
1773                                         ies->data, ies->len,
1774                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1775                                         (u8 *) &bss_conf->p2p_noa_attr,
1776                                         sizeof(bss_conf->p2p_noa_attr));
1777                         if (ret >= 2) {
1778                                 sdata->u.mgd.p2p_noa_index =
1779                                         bss_conf->p2p_noa_attr.index;
1780                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1781                         }
1782                 }
1783                 rcu_read_unlock();
1784         }
1785
1786         /* just to be sure */
1787         ieee80211_stop_poll(sdata);
1788
1789         ieee80211_led_assoc(local, 1);
1790
1791         if (sdata->u.mgd.have_beacon) {
1792                 /*
1793                  * If the AP is buggy we may get here with no DTIM period
1794                  * known, so assume it's 1 which is the only safe assumption
1795                  * in that case, although if the TIM IE is broken powersave
1796                  * probably just won't work at all.
1797                  */
1798                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1799                 bss_conf->beacon_rate = bss->beacon_rate;
1800                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1801         } else {
1802                 bss_conf->beacon_rate = NULL;
1803                 bss_conf->dtim_period = 0;
1804         }
1805
1806         bss_conf->assoc = 1;
1807
1808         /* Tell the driver to monitor connection quality (if supported) */
1809         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1810             bss_conf->cqm_rssi_thold)
1811                 bss_info_changed |= BSS_CHANGED_CQM;
1812
1813         /* Enable ARP filtering */
1814         if (bss_conf->arp_addr_cnt)
1815                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1816
1817         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1818
1819         mutex_lock(&local->iflist_mtx);
1820         ieee80211_recalc_ps(local, -1);
1821         mutex_unlock(&local->iflist_mtx);
1822
1823         ieee80211_recalc_smps(sdata);
1824         ieee80211_recalc_ps_vif(sdata);
1825
1826         netif_carrier_on(sdata->dev);
1827 }
1828
1829 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1830                                    u16 stype, u16 reason, bool tx,
1831                                    u8 *frame_buf)
1832 {
1833         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1834         struct ieee80211_local *local = sdata->local;
1835         u32 changed = 0;
1836
1837         sdata_assert_lock(sdata);
1838
1839         if (WARN_ON_ONCE(tx && !frame_buf))
1840                 return;
1841
1842         if (WARN_ON(!ifmgd->associated))
1843                 return;
1844
1845         ieee80211_stop_poll(sdata);
1846
1847         ifmgd->associated = NULL;
1848         netif_carrier_off(sdata->dev);
1849
1850         /*
1851          * if we want to get out of ps before disassoc (why?) we have
1852          * to do it before sending disassoc, as otherwise the null-packet
1853          * won't be valid.
1854          */
1855         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1856                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1857                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1858         }
1859         local->ps_sdata = NULL;
1860
1861         /* disable per-vif ps */
1862         ieee80211_recalc_ps_vif(sdata);
1863
1864         /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1865         if (tx)
1866                 ieee80211_flush_queues(local, sdata);
1867
1868         /* deauthenticate/disassociate now */
1869         if (tx || frame_buf)
1870                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1871                                                reason, tx, frame_buf);
1872
1873         /* flush out frame */
1874         if (tx)
1875                 ieee80211_flush_queues(local, sdata);
1876
1877         /* clear bssid only after building the needed mgmt frames */
1878         memset(ifmgd->bssid, 0, ETH_ALEN);
1879
1880         /* remove AP and TDLS peers */
1881         sta_info_flush_defer(sdata);
1882
1883         /* finally reset all BSS / config parameters */
1884         changed |= ieee80211_reset_erp_info(sdata);
1885
1886         ieee80211_led_assoc(local, 0);
1887         changed |= BSS_CHANGED_ASSOC;
1888         sdata->vif.bss_conf.assoc = false;
1889
1890         ifmgd->p2p_noa_index = -1;
1891         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1892                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1893
1894         /* on the next assoc, re-program HT/VHT parameters */
1895         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1896         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1897         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1898         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1899
1900         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1901
1902         del_timer_sync(&local->dynamic_ps_timer);
1903         cancel_work_sync(&local->dynamic_ps_enable_work);
1904
1905         /* Disable ARP filtering */
1906         if (sdata->vif.bss_conf.arp_addr_cnt)
1907                 changed |= BSS_CHANGED_ARP_FILTER;
1908
1909         sdata->vif.bss_conf.qos = false;
1910         changed |= BSS_CHANGED_QOS;
1911
1912         /* The BSSID (not really interesting) and HT changed */
1913         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1914         ieee80211_bss_info_change_notify(sdata, changed);
1915
1916         /* disassociated - set to defaults now */
1917         ieee80211_set_wmm_default(sdata, false);
1918
1919         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1920         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1921         del_timer_sync(&sdata->u.mgd.timer);
1922         del_timer_sync(&sdata->u.mgd.chswitch_timer);
1923
1924         sdata->vif.bss_conf.dtim_period = 0;
1925         sdata->vif.bss_conf.beacon_rate = NULL;
1926
1927         ifmgd->have_beacon = false;
1928
1929         ifmgd->flags = 0;
1930         ieee80211_vif_release_channel(sdata);
1931 }
1932
1933 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1934                              struct ieee80211_hdr *hdr)
1935 {
1936         /*
1937          * We can postpone the mgd.timer whenever receiving unicast frames
1938          * from AP because we know that the connection is working both ways
1939          * at that time. But multicast frames (and hence also beacons) must
1940          * be ignored here, because we need to trigger the timer during
1941          * data idle periods for sending the periodic probe request to the
1942          * AP we're connected to.
1943          */
1944         if (is_multicast_ether_addr(hdr->addr1))
1945                 return;
1946
1947         ieee80211_sta_reset_conn_monitor(sdata);
1948 }
1949
1950 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1951 {
1952         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1953         struct ieee80211_local *local = sdata->local;
1954
1955         mutex_lock(&local->mtx);
1956         if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1957                               IEEE80211_STA_CONNECTION_POLL))) {
1958                 mutex_unlock(&local->mtx);
1959                 return;
1960         }
1961
1962         __ieee80211_stop_poll(sdata);
1963
1964         mutex_lock(&local->iflist_mtx);
1965         ieee80211_recalc_ps(local, -1);
1966         mutex_unlock(&local->iflist_mtx);
1967
1968         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1969                 goto out;
1970
1971         /*
1972          * We've received a probe response, but are not sure whether
1973          * we have or will be receiving any beacons or data, so let's
1974          * schedule the timers again, just in case.
1975          */
1976         ieee80211_sta_reset_beacon_monitor(sdata);
1977
1978         mod_timer(&ifmgd->conn_mon_timer,
1979                   round_jiffies_up(jiffies +
1980                                    IEEE80211_CONNECTION_IDLE_TIME));
1981 out:
1982         mutex_unlock(&local->mtx);
1983 }
1984
1985 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1986                              struct ieee80211_hdr *hdr, bool ack)
1987 {
1988         if (!ieee80211_is_data(hdr->frame_control))
1989             return;
1990
1991         if (ieee80211_is_nullfunc(hdr->frame_control) &&
1992             sdata->u.mgd.probe_send_count > 0) {
1993                 if (ack)
1994                         ieee80211_sta_reset_conn_monitor(sdata);
1995                 else
1996                         sdata->u.mgd.nullfunc_failed = true;
1997                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1998                 return;
1999         }
2000
2001         if (ack)
2002                 ieee80211_sta_reset_conn_monitor(sdata);
2003 }
2004
2005 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2006 {
2007         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2008         const u8 *ssid;
2009         u8 *dst = ifmgd->associated->bssid;
2010         u8 unicast_limit = max(1, max_probe_tries - 3);
2011
2012         /*
2013          * Try sending broadcast probe requests for the last three
2014          * probe requests after the first ones failed since some
2015          * buggy APs only support broadcast probe requests.
2016          */
2017         if (ifmgd->probe_send_count >= unicast_limit)
2018                 dst = NULL;
2019
2020         /*
2021          * When the hardware reports an accurate Tx ACK status, it's
2022          * better to send a nullfunc frame instead of a probe request,
2023          * as it will kick us off the AP quickly if we aren't associated
2024          * anymore. The timeout will be reset if the frame is ACKed by
2025          * the AP.
2026          */
2027         ifmgd->probe_send_count++;
2028
2029         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2030                 ifmgd->nullfunc_failed = false;
2031                 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2032         } else {
2033                 int ssid_len;
2034
2035                 rcu_read_lock();
2036                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2037                 if (WARN_ON_ONCE(ssid == NULL))
2038                         ssid_len = 0;
2039                 else
2040                         ssid_len = ssid[1];
2041
2042                 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2043                                          0, (u32) -1, true, 0,
2044                                          ifmgd->associated->channel, false);
2045                 rcu_read_unlock();
2046         }
2047
2048         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2049         run_again(sdata, ifmgd->probe_timeout);
2050         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2051                 ieee80211_flush_queues(sdata->local, sdata);
2052 }
2053
2054 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2055                                    bool beacon)
2056 {
2057         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2058         bool already = false;
2059
2060         if (!ieee80211_sdata_running(sdata))
2061                 return;
2062
2063         sdata_lock(sdata);
2064
2065         if (!ifmgd->associated)
2066                 goto out;
2067
2068         mutex_lock(&sdata->local->mtx);
2069
2070         if (sdata->local->tmp_channel || sdata->local->scanning) {
2071                 mutex_unlock(&sdata->local->mtx);
2072                 goto out;
2073         }
2074
2075         if (beacon) {
2076                 mlme_dbg_ratelimited(sdata,
2077                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2078                                      beacon_loss_count);
2079
2080                 ieee80211_cqm_rssi_notify(&sdata->vif,
2081                                           NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2082                                           GFP_KERNEL);
2083         }
2084
2085         /*
2086          * The driver/our work has already reported this event or the
2087          * connection monitoring has kicked in and we have already sent
2088          * a probe request. Or maybe the AP died and the driver keeps
2089          * reporting until we disassociate...
2090          *
2091          * In either case we have to ignore the current call to this
2092          * function (except for setting the correct probe reason bit)
2093          * because otherwise we would reset the timer every time and
2094          * never check whether we received a probe response!
2095          */
2096         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2097                             IEEE80211_STA_CONNECTION_POLL))
2098                 already = true;
2099
2100         if (beacon)
2101                 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2102         else
2103                 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2104
2105         mutex_unlock(&sdata->local->mtx);
2106
2107         if (already)
2108                 goto out;
2109
2110         mutex_lock(&sdata->local->iflist_mtx);
2111         ieee80211_recalc_ps(sdata->local, -1);
2112         mutex_unlock(&sdata->local->iflist_mtx);
2113
2114         ifmgd->probe_send_count = 0;
2115         ieee80211_mgd_probe_ap_send(sdata);
2116  out:
2117         sdata_unlock(sdata);
2118 }
2119
2120 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2121                                           struct ieee80211_vif *vif)
2122 {
2123         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2124         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2125         struct cfg80211_bss *cbss;
2126         struct sk_buff *skb;
2127         const u8 *ssid;
2128         int ssid_len;
2129
2130         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2131                 return NULL;
2132
2133         sdata_assert_lock(sdata);
2134
2135         if (ifmgd->associated)
2136                 cbss = ifmgd->associated;
2137         else if (ifmgd->auth_data)
2138                 cbss = ifmgd->auth_data->bss;
2139         else if (ifmgd->assoc_data)
2140                 cbss = ifmgd->assoc_data->bss;
2141         else
2142                 return NULL;
2143
2144         rcu_read_lock();
2145         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2146         if (WARN_ON_ONCE(ssid == NULL))
2147                 ssid_len = 0;
2148         else
2149                 ssid_len = ssid[1];
2150
2151         skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2152                                         (u32) -1, cbss->channel,
2153                                         ssid + 2, ssid_len,
2154                                         NULL, 0, true);
2155         rcu_read_unlock();
2156
2157         return skb;
2158 }
2159 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2160
2161 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2162 {
2163         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2164         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2165
2166         sdata_lock(sdata);
2167         if (!ifmgd->associated) {
2168                 sdata_unlock(sdata);
2169                 return;
2170         }
2171
2172         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2173                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2174                                true, frame_buf);
2175         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2176         ieee80211_wake_queues_by_reason(&sdata->local->hw,
2177                                         IEEE80211_MAX_QUEUE_MAP,
2178                                         IEEE80211_QUEUE_STOP_REASON_CSA);
2179
2180         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2181                               IEEE80211_DEAUTH_FRAME_LEN);
2182         sdata_unlock(sdata);
2183 }
2184
2185 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2186 {
2187         struct ieee80211_sub_if_data *sdata =
2188                 container_of(work, struct ieee80211_sub_if_data,
2189                              u.mgd.beacon_connection_loss_work);
2190         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2191         struct sta_info *sta;
2192
2193         if (ifmgd->associated) {
2194                 rcu_read_lock();
2195                 sta = sta_info_get(sdata, ifmgd->bssid);
2196                 if (sta)
2197                         sta->beacon_loss_count++;
2198                 rcu_read_unlock();
2199         }
2200
2201         if (ifmgd->connection_loss) {
2202                 sdata_info(sdata, "Connection to AP %pM lost\n",
2203                            ifmgd->bssid);
2204                 __ieee80211_disconnect(sdata);
2205         } else {
2206                 ieee80211_mgd_probe_ap(sdata, true);
2207         }
2208 }
2209
2210 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2211 {
2212         struct ieee80211_sub_if_data *sdata =
2213                 container_of(work, struct ieee80211_sub_if_data,
2214                              u.mgd.csa_connection_drop_work);
2215
2216         __ieee80211_disconnect(sdata);
2217 }
2218
2219 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2220 {
2221         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2222         struct ieee80211_hw *hw = &sdata->local->hw;
2223
2224         trace_api_beacon_loss(sdata);
2225
2226         sdata->u.mgd.connection_loss = false;
2227         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2228 }
2229 EXPORT_SYMBOL(ieee80211_beacon_loss);
2230
2231 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2232 {
2233         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2234         struct ieee80211_hw *hw = &sdata->local->hw;
2235
2236         trace_api_connection_loss(sdata);
2237
2238         sdata->u.mgd.connection_loss = true;
2239         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2240 }
2241 EXPORT_SYMBOL(ieee80211_connection_loss);
2242
2243
2244 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2245                                         bool assoc)
2246 {
2247         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2248
2249         sdata_assert_lock(sdata);
2250
2251         if (!assoc) {
2252                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2253
2254                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2255                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2256                 sdata->u.mgd.flags = 0;
2257                 ieee80211_vif_release_channel(sdata);
2258         }
2259
2260         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2261         kfree(auth_data);
2262         sdata->u.mgd.auth_data = NULL;
2263 }
2264
2265 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2266                                      struct ieee80211_mgmt *mgmt, size_t len)
2267 {
2268         struct ieee80211_local *local = sdata->local;
2269         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2270         u8 *pos;
2271         struct ieee802_11_elems elems;
2272         u32 tx_flags = 0;
2273
2274         pos = mgmt->u.auth.variable;
2275         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2276         if (!elems.challenge)
2277                 return;
2278         auth_data->expected_transaction = 4;
2279         drv_mgd_prepare_tx(sdata->local, sdata);
2280         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2281                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2282                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2283         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2284                             elems.challenge - 2, elems.challenge_len + 2,
2285                             auth_data->bss->bssid, auth_data->bss->bssid,
2286                             auth_data->key, auth_data->key_len,
2287                             auth_data->key_idx, tx_flags);
2288 }
2289
2290 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2291                                    struct ieee80211_mgmt *mgmt, size_t len)
2292 {
2293         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2294         u8 bssid[ETH_ALEN];
2295         u16 auth_alg, auth_transaction, status_code;
2296         struct sta_info *sta;
2297
2298         sdata_assert_lock(sdata);
2299
2300         if (len < 24 + 6)
2301                 return;
2302
2303         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2304                 return;
2305
2306         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2307
2308         if (!ether_addr_equal(bssid, mgmt->bssid))
2309                 return;
2310
2311         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2312         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2313         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2314
2315         if (auth_alg != ifmgd->auth_data->algorithm ||
2316             auth_transaction != ifmgd->auth_data->expected_transaction) {
2317                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2318                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2319                            auth_transaction,
2320                            ifmgd->auth_data->expected_transaction);
2321                 return;
2322         }
2323
2324         if (status_code != WLAN_STATUS_SUCCESS) {
2325                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2326                            mgmt->sa, status_code);
2327                 ieee80211_destroy_auth_data(sdata, false);
2328                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2329                 return;
2330         }
2331
2332         switch (ifmgd->auth_data->algorithm) {
2333         case WLAN_AUTH_OPEN:
2334         case WLAN_AUTH_LEAP:
2335         case WLAN_AUTH_FT:
2336         case WLAN_AUTH_SAE:
2337                 break;
2338         case WLAN_AUTH_SHARED_KEY:
2339                 if (ifmgd->auth_data->expected_transaction != 4) {
2340                         ieee80211_auth_challenge(sdata, mgmt, len);
2341                         /* need another frame */
2342                         return;
2343                 }
2344                 break;
2345         default:
2346                 WARN_ONCE(1, "invalid auth alg %d",
2347                           ifmgd->auth_data->algorithm);
2348                 return;
2349         }
2350
2351         sdata_info(sdata, "authenticated\n");
2352         ifmgd->auth_data->done = true;
2353         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2354         ifmgd->auth_data->timeout_started = true;
2355         run_again(sdata, ifmgd->auth_data->timeout);
2356
2357         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2358             ifmgd->auth_data->expected_transaction != 2) {
2359                 /*
2360                  * Report auth frame to user space for processing since another
2361                  * round of Authentication frames is still needed.
2362                  */
2363                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2364                 return;
2365         }
2366
2367         /* move station state to auth */
2368         mutex_lock(&sdata->local->sta_mtx);
2369         sta = sta_info_get(sdata, bssid);
2370         if (!sta) {
2371                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2372                 goto out_err;
2373         }
2374         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2375                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2376                 goto out_err;
2377         }
2378         mutex_unlock(&sdata->local->sta_mtx);
2379
2380         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2381         return;
2382  out_err:
2383         mutex_unlock(&sdata->local->sta_mtx);
2384         /* ignore frame -- wait for timeout */
2385 }
2386
2387
2388 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2389                                      struct ieee80211_mgmt *mgmt, size_t len)
2390 {
2391         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2392         const u8 *bssid = NULL;
2393         u16 reason_code;
2394
2395         sdata_assert_lock(sdata);
2396
2397         if (len < 24 + 2)
2398                 return;
2399
2400         if (!ifmgd->associated ||
2401             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2402                 return;
2403
2404         bssid = ifmgd->associated->bssid;
2405
2406         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2407
2408         sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2409                    bssid, reason_code);
2410
2411         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2412
2413         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2414 }
2415
2416
2417 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2418                                        struct ieee80211_mgmt *mgmt, size_t len)
2419 {
2420         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2421         u16 reason_code;
2422
2423         sdata_assert_lock(sdata);
2424
2425         if (len < 24 + 2)
2426                 return;
2427
2428         if (!ifmgd->associated ||
2429             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2430                 return;
2431
2432         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2433
2434         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2435                    mgmt->sa, reason_code);
2436
2437         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2438
2439         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2440 }
2441
2442 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2443                                 u8 *supp_rates, unsigned int supp_rates_len,
2444                                 u32 *rates, u32 *basic_rates,
2445                                 bool *have_higher_than_11mbit,
2446                                 int *min_rate, int *min_rate_index)
2447 {
2448         int i, j;
2449
2450         for (i = 0; i < supp_rates_len; i++) {
2451                 int rate = (supp_rates[i] & 0x7f) * 5;
2452                 bool is_basic = !!(supp_rates[i] & 0x80);
2453
2454                 if (rate > 110)
2455                         *have_higher_than_11mbit = true;
2456
2457                 /*
2458                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2459                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2460                  *
2461                  * Note: Even through the membership selector and the basic
2462                  *       rate flag share the same bit, they are not exactly
2463                  *       the same.
2464                  */
2465                 if (!!(supp_rates[i] & 0x80) &&
2466                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2467                         continue;
2468
2469                 for (j = 0; j < sband->n_bitrates; j++) {
2470                         if (sband->bitrates[j].bitrate == rate) {
2471                                 *rates |= BIT(j);
2472                                 if (is_basic)
2473                                         *basic_rates |= BIT(j);
2474                                 if (rate < *min_rate) {
2475                                         *min_rate = rate;
2476                                         *min_rate_index = j;
2477                                 }
2478                                 break;
2479                         }
2480                 }
2481         }
2482 }
2483
2484 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2485                                          bool assoc)
2486 {
2487         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2488
2489         sdata_assert_lock(sdata);
2490
2491         if (!assoc) {
2492                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2493
2494                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2495                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2496                 sdata->u.mgd.flags = 0;
2497                 ieee80211_vif_release_channel(sdata);
2498         }
2499
2500         kfree(assoc_data);
2501         sdata->u.mgd.assoc_data = NULL;
2502 }
2503
2504 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2505                                     struct cfg80211_bss *cbss,
2506                                     struct ieee80211_mgmt *mgmt, size_t len)
2507 {
2508         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2509         struct ieee80211_local *local = sdata->local;
2510         struct ieee80211_supported_band *sband;
2511         struct sta_info *sta;
2512         u8 *pos;
2513         u16 capab_info, aid;
2514         struct ieee802_11_elems elems;
2515         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2516         const struct cfg80211_bss_ies *bss_ies = NULL;
2517         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2518         u32 changed = 0;
2519         int err;
2520         bool ret;
2521
2522         /* AssocResp and ReassocResp have identical structure */
2523
2524         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2525         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2526
2527         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2528                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2529                            aid);
2530         aid &= ~(BIT(15) | BIT(14));
2531
2532         ifmgd->broken_ap = false;
2533
2534         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2535                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2536                            aid);
2537                 aid = 0;
2538                 ifmgd->broken_ap = true;
2539         }
2540
2541         pos = mgmt->u.assoc_resp.variable;
2542         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2543
2544         if (!elems.supp_rates) {
2545                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2546                 return false;
2547         }
2548
2549         ifmgd->aid = aid;
2550
2551         /*
2552          * Some APs are erroneously not including some information in their
2553          * (re)association response frames. Try to recover by using the data
2554          * from the beacon or probe response. This seems to afflict mobile
2555          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2556          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2557          */
2558         if ((assoc_data->wmm && !elems.wmm_param) ||
2559             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2560              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2561             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2562              (!elems.vht_cap_elem || !elems.vht_operation))) {
2563                 const struct cfg80211_bss_ies *ies;
2564                 struct ieee802_11_elems bss_elems;
2565
2566                 rcu_read_lock();
2567                 ies = rcu_dereference(cbss->ies);
2568                 if (ies)
2569                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2570                                           GFP_ATOMIC);
2571                 rcu_read_unlock();
2572                 if (!bss_ies)
2573                         return false;
2574
2575                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2576                                        false, &bss_elems);
2577                 if (assoc_data->wmm &&
2578                     !elems.wmm_param && bss_elems.wmm_param) {
2579                         elems.wmm_param = bss_elems.wmm_param;
2580                         sdata_info(sdata,
2581                                    "AP bug: WMM param missing from AssocResp\n");
2582                 }
2583
2584                 /*
2585                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2586                  * have to include the IEs in the (re)association response.
2587                  */
2588                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2589                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2590                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2591                         sdata_info(sdata,
2592                                    "AP bug: HT capability missing from AssocResp\n");
2593                 }
2594                 if (!elems.ht_operation && bss_elems.ht_operation &&
2595                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2596                         elems.ht_operation = bss_elems.ht_operation;
2597                         sdata_info(sdata,
2598                                    "AP bug: HT operation missing from AssocResp\n");
2599                 }
2600                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2601                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2602                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2603                         sdata_info(sdata,
2604                                    "AP bug: VHT capa missing from AssocResp\n");
2605                 }
2606                 if (!elems.vht_operation && bss_elems.vht_operation &&
2607                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2608                         elems.vht_operation = bss_elems.vht_operation;
2609                         sdata_info(sdata,
2610                                    "AP bug: VHT operation missing from AssocResp\n");
2611                 }
2612         }
2613
2614         /*
2615          * We previously checked these in the beacon/probe response, so
2616          * they should be present here. This is just a safety net.
2617          */
2618         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2619             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2620                 sdata_info(sdata,
2621                            "HT AP is missing WMM params or HT capability/operation\n");
2622                 ret = false;
2623                 goto out;
2624         }
2625
2626         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2627             (!elems.vht_cap_elem || !elems.vht_operation)) {
2628                 sdata_info(sdata,
2629                            "VHT AP is missing VHT capability/operation\n");
2630                 ret = false;
2631                 goto out;
2632         }
2633
2634         mutex_lock(&sdata->local->sta_mtx);
2635         /*
2636          * station info was already allocated and inserted before
2637          * the association and should be available to us
2638          */
2639         sta = sta_info_get(sdata, cbss->bssid);
2640         if (WARN_ON(!sta)) {
2641                 mutex_unlock(&sdata->local->sta_mtx);
2642                 ret = false;
2643                 goto out;
2644         }
2645
2646         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2647
2648         /* Set up internal HT/VHT capabilities */
2649         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2650                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2651                                                   elems.ht_cap_elem, sta);
2652
2653         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2654                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2655                                                     elems.vht_cap_elem, sta);
2656
2657         /*
2658          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2659          * in their association response, so ignore that data for our own
2660          * configuration. If it changed since the last beacon, we'll get the
2661          * next beacon and update then.
2662          */
2663
2664         /*
2665          * If an operating mode notification IE is present, override the
2666          * NSS calculation (that would be done in rate_control_rate_init())
2667          * and use the # of streams from that element.
2668          */
2669         if (elems.opmode_notif &&
2670             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2671                 u8 nss;
2672
2673                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2674                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2675                 nss += 1;
2676                 sta->sta.rx_nss = nss;
2677         }
2678
2679         rate_control_rate_init(sta);
2680
2681         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2682                 set_sta_flag(sta, WLAN_STA_MFP);
2683
2684         if (elems.wmm_param)
2685                 set_sta_flag(sta, WLAN_STA_WME);
2686
2687         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2688         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2689                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2690         if (err) {
2691                 sdata_info(sdata,
2692                            "failed to move station %pM to desired state\n",
2693                            sta->sta.addr);
2694                 WARN_ON(__sta_info_destroy(sta));
2695                 mutex_unlock(&sdata->local->sta_mtx);
2696                 ret = false;
2697                 goto out;
2698         }
2699
2700         mutex_unlock(&sdata->local->sta_mtx);
2701
2702         /*
2703          * Always handle WMM once after association regardless
2704          * of the first value the AP uses. Setting -1 here has
2705          * that effect because the AP values is an unsigned
2706          * 4-bit value.
2707          */
2708         ifmgd->wmm_last_param_set = -1;
2709
2710         if (elems.wmm_param)
2711                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2712                                          elems.wmm_param_len);
2713         else
2714                 ieee80211_set_wmm_default(sdata, false);
2715         changed |= BSS_CHANGED_QOS;
2716
2717         /* set AID and assoc capability,
2718          * ieee80211_set_associated() will tell the driver */
2719         bss_conf->aid = aid;
2720         bss_conf->assoc_capability = capab_info;
2721         ieee80211_set_associated(sdata, cbss, changed);
2722
2723         /*
2724          * If we're using 4-addr mode, let the AP know that we're
2725          * doing so, so that it can create the STA VLAN on its side
2726          */
2727         if (ifmgd->use_4addr)
2728                 ieee80211_send_4addr_nullfunc(local, sdata);
2729
2730         /*
2731          * Start timer to probe the connection to the AP now.
2732          * Also start the timer that will detect beacon loss.
2733          */
2734         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2735         ieee80211_sta_reset_beacon_monitor(sdata);
2736
2737         ret = true;
2738  out:
2739         kfree(bss_ies);
2740         return ret;
2741 }
2742
2743 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2744                                          struct ieee80211_mgmt *mgmt,
2745                                          size_t len)
2746 {
2747         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2748         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2749         u16 capab_info, status_code, aid;
2750         struct ieee802_11_elems elems;
2751         u8 *pos;
2752         bool reassoc;
2753         struct cfg80211_bss *bss;
2754
2755         sdata_assert_lock(sdata);
2756
2757         if (!assoc_data)
2758                 return;
2759         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2760                 return;
2761
2762         /*
2763          * AssocResp and ReassocResp have identical structure, so process both
2764          * of them in this function.
2765          */
2766
2767         if (len < 24 + 6)
2768                 return;
2769
2770         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2771         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2772         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2773         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2774
2775         sdata_info(sdata,
2776                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2777                    reassoc ? "Rea" : "A", mgmt->sa,
2778                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2779
2780         pos = mgmt->u.assoc_resp.variable;
2781         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2782
2783         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2784             elems.timeout_int &&
2785             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2786                 u32 tu, ms;
2787                 tu = le32_to_cpu(elems.timeout_int->value);
2788                 ms = tu * 1024 / 1000;
2789                 sdata_info(sdata,
2790                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2791                            mgmt->sa, tu, ms);
2792                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2793                 assoc_data->timeout_started = true;
2794                 if (ms > IEEE80211_ASSOC_TIMEOUT)
2795                         run_again(sdata, assoc_data->timeout);
2796                 return;
2797         }
2798
2799         bss = assoc_data->bss;
2800
2801         if (status_code != WLAN_STATUS_SUCCESS) {
2802                 sdata_info(sdata, "%pM denied association (code=%d)\n",
2803                            mgmt->sa, status_code);
2804                 ieee80211_destroy_assoc_data(sdata, false);
2805         } else {
2806                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2807                         /* oops -- internal error -- send timeout for now */
2808                         ieee80211_destroy_assoc_data(sdata, false);
2809                         cfg80211_assoc_timeout(sdata->dev, bss);
2810                         return;
2811                 }
2812                 sdata_info(sdata, "associated\n");
2813
2814                 /*
2815                  * destroy assoc_data afterwards, as otherwise an idle
2816                  * recalc after assoc_data is NULL but before associated
2817                  * is set can cause the interface to go idle
2818                  */
2819                 ieee80211_destroy_assoc_data(sdata, true);
2820         }
2821
2822         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2823 }
2824
2825 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2826                                   struct ieee80211_mgmt *mgmt, size_t len,
2827                                   struct ieee80211_rx_status *rx_status,
2828                                   struct ieee802_11_elems *elems)
2829 {
2830         struct ieee80211_local *local = sdata->local;
2831         int freq;
2832         struct ieee80211_bss *bss;
2833         struct ieee80211_channel *channel;
2834
2835         sdata_assert_lock(sdata);
2836
2837         if (elems->ds_params)
2838                 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2839                                                       rx_status->band);
2840         else
2841                 freq = rx_status->freq;
2842
2843         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2844
2845         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2846                 return;
2847
2848         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2849                                         channel);
2850         if (bss) {
2851                 ieee80211_rx_bss_put(local, bss);
2852                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2853         }
2854
2855         if (!sdata->u.mgd.associated ||
2856             !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
2857                 return;
2858
2859         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2860                                          elems, true);
2861
2862 }
2863
2864
2865 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2866                                          struct sk_buff *skb)
2867 {
2868         struct ieee80211_mgmt *mgmt = (void *)skb->data;
2869         struct ieee80211_if_managed *ifmgd;
2870         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2871         size_t baselen, len = skb->len;
2872         struct ieee802_11_elems elems;
2873
2874         ifmgd = &sdata->u.mgd;
2875
2876         sdata_assert_lock(sdata);
2877
2878         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2879                 return; /* ignore ProbeResp to foreign address */
2880
2881         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2882         if (baselen > len)
2883                 return;
2884
2885         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2886                                false, &elems);
2887
2888         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2889
2890         if (ifmgd->associated &&
2891             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2892                 ieee80211_reset_ap_probe(sdata);
2893
2894         if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2895             ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2896                 /* got probe response, continue with auth */
2897                 sdata_info(sdata, "direct probe responded\n");
2898                 ifmgd->auth_data->tries = 0;
2899                 ifmgd->auth_data->timeout = jiffies;
2900                 ifmgd->auth_data->timeout_started = true;
2901                 run_again(sdata, ifmgd->auth_data->timeout);
2902         }
2903 }
2904
2905 /*
2906  * This is the canonical list of information elements we care about,
2907  * the filter code also gives us all changes to the Microsoft OUI
2908  * (00:50:F2) vendor IE which is used for WMM which we need to track.
2909  *
2910  * We implement beacon filtering in software since that means we can
2911  * avoid processing the frame here and in cfg80211, and userspace
2912  * will not be able to tell whether the hardware supports it or not.
2913  *
2914  * XXX: This list needs to be dynamic -- userspace needs to be able to
2915  *      add items it requires. It also needs to be able to tell us to
2916  *      look out for other vendor IEs.
2917  */
2918 static const u64 care_about_ies =
2919         (1ULL << WLAN_EID_COUNTRY) |
2920         (1ULL << WLAN_EID_ERP_INFO) |
2921         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2922         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2923         (1ULL << WLAN_EID_HT_CAPABILITY) |
2924         (1ULL << WLAN_EID_HT_OPERATION);
2925
2926 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2927                                      struct ieee80211_mgmt *mgmt, size_t len,
2928                                      struct ieee80211_rx_status *rx_status)
2929 {
2930         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2931         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2932         size_t baselen;
2933         struct ieee802_11_elems elems;
2934         struct ieee80211_local *local = sdata->local;
2935         struct ieee80211_chanctx_conf *chanctx_conf;
2936         struct ieee80211_channel *chan;
2937         struct sta_info *sta;
2938         u32 changed = 0;
2939         bool erp_valid;
2940         u8 erp_value = 0;
2941         u32 ncrc;
2942         u8 *bssid;
2943         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2944
2945         sdata_assert_lock(sdata);
2946
2947         /* Process beacon from the current BSS */
2948         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2949         if (baselen > len)
2950                 return;
2951
2952         rcu_read_lock();
2953         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2954         if (!chanctx_conf) {
2955                 rcu_read_unlock();
2956                 return;
2957         }
2958
2959         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2960                 rcu_read_unlock();
2961                 return;
2962         }
2963         chan = chanctx_conf->def.chan;
2964         rcu_read_unlock();
2965
2966         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2967             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2968                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2969                                        len - baselen, false, &elems);
2970
2971                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2972                 if (elems.tim && !elems.parse_error) {
2973                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
2974                         ifmgd->dtim_period = tim_ie->dtim_period;
2975                 }
2976                 ifmgd->have_beacon = true;
2977                 ifmgd->assoc_data->need_beacon = false;
2978                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2979                         sdata->vif.bss_conf.sync_tsf =
2980                                 le64_to_cpu(mgmt->u.beacon.timestamp);
2981                         sdata->vif.bss_conf.sync_device_ts =
2982                                 rx_status->device_timestamp;
2983                         if (elems.tim)
2984                                 sdata->vif.bss_conf.sync_dtim_count =
2985                                         elems.tim->dtim_count;
2986                         else
2987                                 sdata->vif.bss_conf.sync_dtim_count = 0;
2988                 }
2989                 /* continue assoc process */
2990                 ifmgd->assoc_data->timeout = jiffies;
2991                 ifmgd->assoc_data->timeout_started = true;
2992                 run_again(sdata, ifmgd->assoc_data->timeout);
2993                 return;
2994         }
2995
2996         if (!ifmgd->associated ||
2997             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2998                 return;
2999         bssid = ifmgd->associated->bssid;
3000
3001         /* Track average RSSI from the Beacon frames of the current AP */
3002         ifmgd->last_beacon_signal = rx_status->signal;
3003         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3004                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3005                 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3006                 ifmgd->last_cqm_event_signal = 0;
3007                 ifmgd->count_beacon_signal = 1;
3008                 ifmgd->last_ave_beacon_signal = 0;
3009         } else {
3010                 ifmgd->ave_beacon_signal =
3011                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3012                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3013                          ifmgd->ave_beacon_signal) / 16;
3014                 ifmgd->count_beacon_signal++;
3015         }
3016
3017         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3018             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3019                 int sig = ifmgd->ave_beacon_signal;
3020                 int last_sig = ifmgd->last_ave_beacon_signal;
3021
3022                 /*
3023                  * if signal crosses either of the boundaries, invoke callback
3024                  * with appropriate parameters
3025                  */
3026                 if (sig > ifmgd->rssi_max_thold &&
3027                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3028                         ifmgd->last_ave_beacon_signal = sig;
3029                         drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3030                 } else if (sig < ifmgd->rssi_min_thold &&
3031                            (last_sig >= ifmgd->rssi_max_thold ||
3032                            last_sig == 0)) {
3033                         ifmgd->last_ave_beacon_signal = sig;
3034                         drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3035                 }
3036         }
3037
3038         if (bss_conf->cqm_rssi_thold &&
3039             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3040             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3041                 int sig = ifmgd->ave_beacon_signal / 16;
3042                 int last_event = ifmgd->last_cqm_event_signal;
3043                 int thold = bss_conf->cqm_rssi_thold;
3044                 int hyst = bss_conf->cqm_rssi_hyst;
3045                 if (sig < thold &&
3046                     (last_event == 0 || sig < last_event - hyst)) {
3047                         ifmgd->last_cqm_event_signal = sig;
3048                         ieee80211_cqm_rssi_notify(
3049                                 &sdata->vif,
3050                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3051                                 GFP_KERNEL);
3052                 } else if (sig > thold &&
3053                            (last_event == 0 || sig > last_event + hyst)) {
3054                         ifmgd->last_cqm_event_signal = sig;
3055                         ieee80211_cqm_rssi_notify(
3056                                 &sdata->vif,
3057                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3058                                 GFP_KERNEL);
3059                 }
3060         }
3061
3062         if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
3063                 mlme_dbg_ratelimited(sdata,
3064                                      "cancelling AP probe due to a received beacon\n");
3065                 mutex_lock(&local->mtx);
3066                 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
3067                 ieee80211_run_deferred_scan(local);
3068                 mutex_unlock(&local->mtx);
3069
3070                 mutex_lock(&local->iflist_mtx);
3071                 ieee80211_recalc_ps(local, -1);
3072                 mutex_unlock(&local->iflist_mtx);
3073         }
3074
3075         /*
3076          * Push the beacon loss detection into the future since
3077          * we are processing a beacon from the AP just now.
3078          */
3079         ieee80211_sta_reset_beacon_monitor(sdata);
3080
3081         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3082         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3083                                           len - baselen, false, &elems,
3084                                           care_about_ies, ncrc);
3085
3086         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3087                 bool directed_tim = ieee80211_check_tim(elems.tim,
3088                                                         elems.tim_len,
3089                                                         ifmgd->aid);
3090                 if (directed_tim) {
3091                         if (local->hw.conf.dynamic_ps_timeout > 0) {
3092                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3093                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3094                                         ieee80211_hw_config(local,
3095                                                             IEEE80211_CONF_CHANGE_PS);
3096                                 }
3097                                 ieee80211_send_nullfunc(local, sdata, 0);
3098                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
3099                                 local->pspolling = true;
3100
3101                                 /*
3102                                  * Here is assumed that the driver will be
3103                                  * able to send ps-poll frame and receive a
3104                                  * response even though power save mode is
3105                                  * enabled, but some drivers might require
3106                                  * to disable power save here. This needs
3107                                  * to be investigated.
3108                                  */
3109                                 ieee80211_send_pspoll(local, sdata);
3110                         }
3111                 }
3112         }
3113
3114         if (sdata->vif.p2p) {
3115                 struct ieee80211_p2p_noa_attr noa = {};
3116                 int ret;
3117
3118                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3119                                             len - baselen,
3120                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3121                                             (u8 *) &noa, sizeof(noa));
3122                 if (ret >= 2) {
3123                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3124                                 /* valid noa_attr and index changed */
3125                                 sdata->u.mgd.p2p_noa_index = noa.index;
3126                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3127                                 changed |= BSS_CHANGED_P2P_PS;
3128                                 /*
3129                                  * make sure we update all information, the CRC
3130                                  * mechanism doesn't look at P2P attributes.
3131                                  */
3132                                 ifmgd->beacon_crc_valid = false;
3133                         }
3134                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3135                         /* noa_attr not found and we had valid noa_attr before */
3136                         sdata->u.mgd.p2p_noa_index = -1;
3137                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3138                         changed |= BSS_CHANGED_P2P_PS;
3139                         ifmgd->beacon_crc_valid = false;
3140                 }
3141         }
3142
3143         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3144                 return;
3145         ifmgd->beacon_crc = ncrc;
3146         ifmgd->beacon_crc_valid = true;
3147
3148         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3149
3150         if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3151                                      elems.wmm_param_len))
3152                 changed |= BSS_CHANGED_QOS;
3153
3154         /*
3155          * If we haven't had a beacon before, tell the driver about the
3156          * DTIM period (and beacon timing if desired) now.
3157          */
3158         if (!ifmgd->have_beacon) {
3159                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3160                 if (elems.tim)
3161                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3162                 else
3163                         bss_conf->dtim_period = 1;
3164
3165                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3166                         sdata->vif.bss_conf.sync_tsf =
3167                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3168                         sdata->vif.bss_conf.sync_device_ts =
3169                                 rx_status->device_timestamp;
3170                         if (elems.tim)
3171                                 sdata->vif.bss_conf.sync_dtim_count =
3172                                         elems.tim->dtim_count;
3173                         else
3174                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3175                 }
3176
3177                 changed |= BSS_CHANGED_BEACON_INFO;
3178                 ifmgd->have_beacon = true;
3179
3180                 mutex_lock(&local->iflist_mtx);
3181                 ieee80211_recalc_ps(local, -1);
3182                 mutex_unlock(&local->iflist_mtx);
3183
3184                 ieee80211_recalc_ps_vif(sdata);
3185         }
3186
3187         if (elems.erp_info) {
3188                 erp_valid = true;
3189                 erp_value = elems.erp_info[0];
3190         } else {
3191                 erp_valid = false;
3192         }
3193         changed |= ieee80211_handle_bss_capability(sdata,
3194                         le16_to_cpu(mgmt->u.beacon.capab_info),
3195                         erp_valid, erp_value);
3196
3197         mutex_lock(&local->sta_mtx);
3198         sta = sta_info_get(sdata, bssid);
3199
3200         if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3201                                 elems.vht_operation, bssid, &changed)) {
3202                 mutex_unlock(&local->sta_mtx);
3203                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3204                                        WLAN_REASON_DEAUTH_LEAVING,
3205                                        true, deauth_buf);
3206                 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3207                                       sizeof(deauth_buf));
3208                 return;
3209         }
3210
3211         if (sta && elems.opmode_notif)
3212                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3213                                             rx_status->band, true);
3214         mutex_unlock(&local->sta_mtx);
3215
3216         if (elems.country_elem && elems.pwr_constr_elem &&
3217             mgmt->u.probe_resp.capab_info &
3218                                 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3219                 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3220                                                        elems.country_elem,
3221                                                        elems.country_elem_len,
3222                                                        elems.pwr_constr_elem);
3223
3224         ieee80211_bss_info_change_notify(sdata, changed);
3225 }
3226
3227 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3228                                   struct sk_buff *skb)
3229 {
3230         struct ieee80211_rx_status *rx_status;
3231         struct ieee80211_mgmt *mgmt;
3232         u16 fc;
3233         struct ieee802_11_elems elems;
3234         int ies_len;
3235
3236         rx_status = (struct ieee80211_rx_status *) skb->cb;
3237         mgmt = (struct ieee80211_mgmt *) skb->data;
3238         fc = le16_to_cpu(mgmt->frame_control);
3239
3240         sdata_lock(sdata);
3241
3242         switch (fc & IEEE80211_FCTL_STYPE) {
3243         case IEEE80211_STYPE_BEACON:
3244                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3245                 break;
3246         case IEEE80211_STYPE_PROBE_RESP:
3247                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3248                 break;
3249         case IEEE80211_STYPE_AUTH:
3250                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3251                 break;
3252         case IEEE80211_STYPE_DEAUTH:
3253                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3254                 break;
3255         case IEEE80211_STYPE_DISASSOC:
3256                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3257                 break;
3258         case IEEE80211_STYPE_ASSOC_RESP:
3259         case IEEE80211_STYPE_REASSOC_RESP:
3260                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3261                 break;
3262         case IEEE80211_STYPE_ACTION:
3263                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3264                         ies_len = skb->len -
3265                                   offsetof(struct ieee80211_mgmt,
3266                                            u.action.u.chan_switch.variable);
3267
3268                         if (ies_len < 0)
3269                                 break;
3270
3271                         ieee802_11_parse_elems(
3272                                 mgmt->u.action.u.chan_switch.variable,
3273                                 ies_len, true, &elems);
3274
3275                         if (elems.parse_error)
3276                                 break;
3277
3278                         ieee80211_sta_process_chanswitch(sdata,
3279                                                          rx_status->mactime,
3280                                                          &elems, false);
3281                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3282                         ies_len = skb->len -
3283                                   offsetof(struct ieee80211_mgmt,
3284                                            u.action.u.ext_chan_switch.variable);
3285
3286                         if (ies_len < 0)
3287                                 break;
3288
3289                         ieee802_11_parse_elems(
3290                                 mgmt->u.action.u.ext_chan_switch.variable,
3291                                 ies_len, true, &elems);
3292
3293                         if (elems.parse_error)
3294                                 break;
3295
3296                         /* for the handling code pretend this was also an IE */
3297                         elems.ext_chansw_ie =
3298                                 &mgmt->u.action.u.ext_chan_switch.data;
3299
3300                         ieee80211_sta_process_chanswitch(sdata,
3301                                                          rx_status->mactime,
3302                                                          &elems, false);
3303                 }
3304                 break;
3305         }
3306         sdata_unlock(sdata);
3307 }
3308
3309 static void ieee80211_sta_timer(unsigned long data)
3310 {
3311         struct ieee80211_sub_if_data *sdata =
3312                 (struct ieee80211_sub_if_data *) data;
3313
3314         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3315 }
3316
3317 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3318                                           u8 *bssid, u8 reason, bool tx)
3319 {
3320         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3321
3322         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3323                                tx, frame_buf);
3324
3325         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3326                               IEEE80211_DEAUTH_FRAME_LEN);
3327 }
3328
3329 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3330 {
3331         struct ieee80211_local *local = sdata->local;
3332         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3333         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3334         u32 tx_flags = 0;
3335
3336         sdata_assert_lock(sdata);
3337
3338         if (WARN_ON_ONCE(!auth_data))
3339                 return -EINVAL;
3340
3341         auth_data->tries++;
3342
3343         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3344                 sdata_info(sdata, "authentication with %pM timed out\n",
3345                            auth_data->bss->bssid);
3346
3347                 /*
3348                  * Most likely AP is not in the range so remove the
3349                  * bss struct for that AP.
3350                  */
3351                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3352
3353                 return -ETIMEDOUT;
3354         }
3355
3356         drv_mgd_prepare_tx(local, sdata);
3357
3358         if (auth_data->bss->proberesp_ies) {
3359                 u16 trans = 1;
3360                 u16 status = 0;
3361
3362                 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3363                            auth_data->bss->bssid, auth_data->tries,
3364                            IEEE80211_AUTH_MAX_TRIES);
3365
3366                 auth_data->expected_transaction = 2;
3367
3368                 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3369                         trans = auth_data->sae_trans;
3370                         status = auth_data->sae_status;
3371                         auth_data->expected_transaction = trans;
3372                 }
3373
3374                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3375                         tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3376                                    IEEE80211_TX_INTFL_MLME_CONN_TX;
3377
3378                 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3379                                     auth_data->data, auth_data->data_len,
3380                                     auth_data->bss->bssid,
3381                                     auth_data->bss->bssid, NULL, 0, 0,
3382                                     tx_flags);
3383         } else {
3384                 const u8 *ssidie;
3385
3386                 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3387                            auth_data->bss->bssid, auth_data->tries,
3388                            IEEE80211_AUTH_MAX_TRIES);
3389
3390                 rcu_read_lock();
3391                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3392                 if (!ssidie) {
3393                         rcu_read_unlock();
3394                         return -EINVAL;
3395                 }
3396                 /*
3397                  * Direct probe is sent to broadcast address as some APs
3398                  * will not answer to direct packet in unassociated state.
3399                  */
3400                 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3401                                          NULL, 0, (u32) -1, true, 0,
3402                                          auth_data->bss->channel, false);
3403                 rcu_read_unlock();
3404         }
3405
3406         if (tx_flags == 0) {
3407                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3408                 auth_data->timeout_started = true;
3409                 run_again(sdata, auth_data->timeout);
3410         } else {
3411                 auth_data->timeout =
3412                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3413                 auth_data->timeout_started = true;
3414                 run_again(sdata, auth_data->timeout);
3415         }
3416
3417         return 0;
3418 }
3419
3420 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3421 {
3422         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3423         struct ieee80211_local *local = sdata->local;
3424
3425         sdata_assert_lock(sdata);
3426
3427         assoc_data->tries++;
3428         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3429                 sdata_info(sdata, "association with %pM timed out\n",
3430                            assoc_data->bss->bssid);
3431
3432                 /*
3433                  * Most likely AP is not in the range so remove the
3434                  * bss struct for that AP.
3435                  */
3436                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3437
3438                 return -ETIMEDOUT;
3439         }
3440
3441         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3442                    assoc_data->bss->bssid, assoc_data->tries,
3443                    IEEE80211_ASSOC_MAX_TRIES);
3444         ieee80211_send_assoc(sdata);
3445
3446         if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3447                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3448                 assoc_data->timeout_started = true;
3449                 run_again(sdata, assoc_data->timeout);
3450         } else {
3451                 assoc_data->timeout =
3452                         round_jiffies_up(jiffies +
3453                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3454                 assoc_data->timeout_started = true;
3455                 run_again(sdata, assoc_data->timeout);
3456         }
3457
3458         return 0;
3459 }
3460
3461 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3462                                   __le16 fc, bool acked)
3463 {
3464         struct ieee80211_local *local = sdata->local;
3465
3466         sdata->u.mgd.status_fc = fc;
3467         sdata->u.mgd.status_acked = acked;
3468         sdata->u.mgd.status_received = true;
3469
3470         ieee80211_queue_work(&local->hw, &sdata->work);
3471 }
3472
3473 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3474 {
3475         struct ieee80211_local *local = sdata->local;
3476         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3477
3478         sdata_lock(sdata);
3479
3480         if (ifmgd->status_received) {
3481                 __le16 fc = ifmgd->status_fc;
3482                 bool status_acked = ifmgd->status_acked;
3483
3484                 ifmgd->status_received = false;
3485                 if (ifmgd->auth_data &&
3486                     (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3487                         if (status_acked) {
3488                                 ifmgd->auth_data->timeout =
3489                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3490                                 run_again(sdata, ifmgd->auth_data->timeout);
3491                         } else {
3492                                 ifmgd->auth_data->timeout = jiffies - 1;
3493                         }
3494                         ifmgd->auth_data->timeout_started = true;
3495                 } else if (ifmgd->assoc_data &&
3496                            (ieee80211_is_assoc_req(fc) ||
3497                             ieee80211_is_reassoc_req(fc))) {
3498                         if (status_acked) {
3499                                 ifmgd->assoc_data->timeout =
3500                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3501                                 run_again(sdata, ifmgd->assoc_data->timeout);
3502                         } else {
3503                                 ifmgd->assoc_data->timeout = jiffies - 1;
3504                         }
3505                         ifmgd->assoc_data->timeout_started = true;
3506                 }
3507         }
3508
3509         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3510             time_after(jiffies, ifmgd->auth_data->timeout)) {
3511                 if (ifmgd->auth_data->done) {
3512                         /*
3513                          * ok ... we waited for assoc but userspace didn't,
3514                          * so let's just kill the auth data
3515                          */
3516                         ieee80211_destroy_auth_data(sdata, false);
3517                 } else if (ieee80211_probe_auth(sdata)) {
3518                         u8 bssid[ETH_ALEN];
3519
3520                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3521
3522                         ieee80211_destroy_auth_data(sdata, false);
3523
3524                         cfg80211_auth_timeout(sdata->dev, bssid);
3525                 }
3526         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3527                 run_again(sdata, ifmgd->auth_data->timeout);
3528
3529         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3530             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3531                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3532                     ieee80211_do_assoc(sdata)) {
3533                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3534
3535                         ieee80211_destroy_assoc_data(sdata, false);
3536                         cfg80211_assoc_timeout(sdata->dev, bss);
3537                 }
3538         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3539                 run_again(sdata, ifmgd->assoc_data->timeout);
3540
3541         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3542                             IEEE80211_STA_CONNECTION_POLL) &&
3543             ifmgd->associated) {
3544                 u8 bssid[ETH_ALEN];
3545                 int max_tries;
3546
3547                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3548
3549                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3550                         max_tries = max_nullfunc_tries;
3551                 else
3552                         max_tries = max_probe_tries;
3553
3554                 /* ACK received for nullfunc probing frame */
3555                 if (!ifmgd->probe_send_count)
3556                         ieee80211_reset_ap_probe(sdata);
3557                 else if (ifmgd->nullfunc_failed) {
3558                         if (ifmgd->probe_send_count < max_tries) {
3559                                 mlme_dbg(sdata,
3560                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3561                                          bssid, ifmgd->probe_send_count,
3562                                          max_tries);
3563                                 ieee80211_mgd_probe_ap_send(sdata);
3564                         } else {
3565                                 mlme_dbg(sdata,
3566                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3567                                          bssid);
3568                                 ieee80211_sta_connection_lost(sdata, bssid,
3569                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3570                                         false);
3571                         }
3572                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3573                         run_again(sdata, ifmgd->probe_timeout);
3574                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3575                         mlme_dbg(sdata,
3576                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3577                                  bssid, probe_wait_ms);
3578                         ieee80211_sta_connection_lost(sdata, bssid,
3579                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3580                 } else if (ifmgd->probe_send_count < max_tries) {
3581                         mlme_dbg(sdata,
3582                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3583                                  bssid, probe_wait_ms,
3584                                  ifmgd->probe_send_count, max_tries);
3585                         ieee80211_mgd_probe_ap_send(sdata);
3586                 } else {
3587                         /*
3588                          * We actually lost the connection ... or did we?
3589                          * Let's make sure!
3590                          */
3591                         wiphy_debug(local->hw.wiphy,
3592                                     "%s: No probe response from AP %pM"
3593                                     " after %dms, disconnecting.\n",
3594                                     sdata->name,
3595                                     bssid, probe_wait_ms);
3596
3597                         ieee80211_sta_connection_lost(sdata, bssid,
3598                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3599                 }
3600         }
3601
3602         sdata_unlock(sdata);
3603 }
3604
3605 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3606 {
3607         struct ieee80211_sub_if_data *sdata =
3608                 (struct ieee80211_sub_if_data *) data;
3609         struct ieee80211_local *local = sdata->local;
3610
3611         if (local->quiescing)
3612                 return;
3613
3614         sdata->u.mgd.connection_loss = false;
3615         ieee80211_queue_work(&sdata->local->hw,
3616                              &sdata->u.mgd.beacon_connection_loss_work);
3617 }
3618
3619 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3620 {
3621         struct ieee80211_sub_if_data *sdata =
3622                 (struct ieee80211_sub_if_data *) data;
3623         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3624         struct ieee80211_local *local = sdata->local;
3625
3626         if (local->quiescing)
3627                 return;
3628
3629         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3630 }
3631
3632 static void ieee80211_sta_monitor_work(struct work_struct *work)
3633 {
3634         struct ieee80211_sub_if_data *sdata =
3635                 container_of(work, struct ieee80211_sub_if_data,
3636                              u.mgd.monitor_work);
3637
3638         ieee80211_mgd_probe_ap(sdata, false);
3639 }
3640
3641 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3642 {
3643         u32 flags;
3644
3645         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3646                 __ieee80211_stop_poll(sdata);
3647
3648                 /* let's probe the connection once */
3649                 flags = sdata->local->hw.flags;
3650                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3651                         ieee80211_queue_work(&sdata->local->hw,
3652                                              &sdata->u.mgd.monitor_work);
3653                 /* and do all the other regular work too */
3654                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3655         }
3656 }
3657
3658 #ifdef CONFIG_PM
3659 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3660 {
3661         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3662
3663         sdata_lock(sdata);
3664         if (!ifmgd->associated) {
3665                 sdata_unlock(sdata);
3666                 return;
3667         }
3668
3669         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3670                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3671                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3672                 ieee80211_sta_connection_lost(sdata,
3673                                               ifmgd->associated->bssid,
3674                                               WLAN_REASON_UNSPECIFIED,
3675                                               true);
3676                 sdata_unlock(sdata);
3677                 return;
3678         }
3679         sdata_unlock(sdata);
3680 }
3681 #endif
3682
3683 /* interface setup */
3684 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3685 {
3686         struct ieee80211_if_managed *ifmgd;
3687
3688         ifmgd = &sdata->u.mgd;
3689         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3690         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3691         INIT_WORK(&ifmgd->beacon_connection_loss_work,
3692                   ieee80211_beacon_connection_loss_work);
3693         INIT_WORK(&ifmgd->csa_connection_drop_work,
3694                   ieee80211_csa_connection_drop_work);
3695         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3696         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3697                     (unsigned long) sdata);
3698         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3699                     (unsigned long) sdata);
3700         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3701                     (unsigned long) sdata);
3702         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3703                     (unsigned long) sdata);
3704
3705         ifmgd->flags = 0;
3706         ifmgd->powersave = sdata->wdev.ps;
3707         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3708         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3709         ifmgd->p2p_noa_index = -1;
3710
3711         if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3712                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3713         else
3714                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3715 }
3716
3717 /* scan finished notification */
3718 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3719 {
3720         struct ieee80211_sub_if_data *sdata;
3721
3722         /* Restart STA timers */
3723         rcu_read_lock();
3724         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3725                 if (ieee80211_sdata_running(sdata))
3726                         ieee80211_restart_sta_timer(sdata);
3727         }
3728         rcu_read_unlock();
3729 }
3730
3731 int ieee80211_max_network_latency(struct notifier_block *nb,
3732                                   unsigned long data, void *dummy)
3733 {
3734         s32 latency_usec = (s32) data;
3735         struct ieee80211_local *local =
3736                 container_of(nb, struct ieee80211_local,
3737                              network_latency_notifier);
3738
3739         mutex_lock(&local->iflist_mtx);
3740         ieee80211_recalc_ps(local, latency_usec);
3741         mutex_unlock(&local->iflist_mtx);
3742
3743         return 0;
3744 }
3745
3746 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3747                                      struct cfg80211_bss *cbss)
3748 {
3749         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3750         const u8 *ht_cap_ie, *vht_cap_ie;
3751         const struct ieee80211_ht_cap *ht_cap;
3752         const struct ieee80211_vht_cap *vht_cap;
3753         u8 chains = 1;
3754
3755         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3756                 return chains;
3757
3758         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3759         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3760                 ht_cap = (void *)(ht_cap_ie + 2);
3761                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3762                 /*
3763                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3764                  *       "Tx Unequal Modulation Supported" fields.
3765                  */
3766         }
3767
3768         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3769                 return chains;
3770
3771         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3772         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3773                 u8 nss;
3774                 u16 tx_mcs_map;
3775
3776                 vht_cap = (void *)(vht_cap_ie + 2);
3777                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3778                 for (nss = 8; nss > 0; nss--) {
3779                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3780                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
3781                                 break;
3782                 }
3783                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3784                 chains = max(chains, nss);
3785         }
3786
3787         return chains;
3788 }
3789
3790 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3791                                   struct cfg80211_bss *cbss)
3792 {
3793         struct ieee80211_local *local = sdata->local;
3794         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3795         const struct ieee80211_ht_operation *ht_oper = NULL;
3796         const struct ieee80211_vht_operation *vht_oper = NULL;
3797         struct ieee80211_supported_band *sband;
3798         struct cfg80211_chan_def chandef;
3799         int ret;
3800
3801         sband = local->hw.wiphy->bands[cbss->channel->band];
3802
3803         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3804                           IEEE80211_STA_DISABLE_80P80MHZ |
3805                           IEEE80211_STA_DISABLE_160MHZ);
3806
3807         rcu_read_lock();
3808
3809         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3810             sband->ht_cap.ht_supported) {
3811                 const u8 *ht_oper_ie, *ht_cap;
3812
3813                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3814                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3815                         ht_oper = (void *)(ht_oper_ie + 2);
3816
3817                 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3818                 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3819                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3820                         ht_oper = NULL;
3821                 }
3822         }
3823
3824         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3825             sband->vht_cap.vht_supported) {
3826                 const u8 *vht_oper_ie, *vht_cap;
3827
3828                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3829                                                    WLAN_EID_VHT_OPERATION);
3830                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3831                         vht_oper = (void *)(vht_oper_ie + 2);
3832                 if (vht_oper && !ht_oper) {
3833                         vht_oper = NULL;
3834                         sdata_info(sdata,
3835                                    "AP advertised VHT without HT, disabling both\n");
3836                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3837                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3838                 }
3839
3840                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3841                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3842                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3843                         vht_oper = NULL;
3844                 }
3845         }
3846
3847         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3848                                                      cbss->channel,
3849                                                      ht_oper, vht_oper,
3850                                                      &chandef, false);
3851
3852         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3853                                       local->rx_chains);
3854
3855         rcu_read_unlock();
3856
3857         /* will change later if needed */
3858         sdata->smps_mode = IEEE80211_SMPS_OFF;
3859
3860         /*
3861          * If this fails (possibly due to channel context sharing
3862          * on incompatible channels, e.g. 80+80 and 160 sharing the
3863          * same control channel) try to use a smaller bandwidth.
3864          */
3865         ret = ieee80211_vif_use_channel(sdata, &chandef,
3866                                         IEEE80211_CHANCTX_SHARED);
3867
3868         /* don't downgrade for 5 and 10 MHz channels, though. */
3869         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3870             chandef.width == NL80211_CHAN_WIDTH_10)
3871                 return ret;
3872
3873         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3874                 ifmgd->flags |= chandef_downgrade(&chandef);
3875                 ret = ieee80211_vif_use_channel(sdata, &chandef,
3876                                                 IEEE80211_CHANCTX_SHARED);
3877         }
3878         return ret;
3879 }
3880
3881 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3882                                      struct cfg80211_bss *cbss, bool assoc)
3883 {
3884         struct ieee80211_local *local = sdata->local;
3885         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3886         struct ieee80211_bss *bss = (void *)cbss->priv;
3887         struct sta_info *new_sta = NULL;
3888         bool have_sta = false;
3889         int err;
3890
3891         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3892                 return -EINVAL;
3893
3894         if (assoc) {
3895                 rcu_read_lock();
3896                 have_sta = sta_info_get(sdata, cbss->bssid);
3897                 rcu_read_unlock();
3898         }
3899
3900         if (!have_sta) {
3901                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3902                 if (!new_sta)
3903                         return -ENOMEM;
3904         }
3905
3906         if (new_sta) {
3907                 u32 rates = 0, basic_rates = 0;
3908                 bool have_higher_than_11mbit;
3909                 int min_rate = INT_MAX, min_rate_index = -1;
3910                 struct ieee80211_supported_band *sband;
3911                 const struct cfg80211_bss_ies *ies;
3912
3913                 sband = local->hw.wiphy->bands[cbss->channel->band];
3914
3915                 err = ieee80211_prep_channel(sdata, cbss);
3916                 if (err) {
3917                         sta_info_free(local, new_sta);
3918                         return err;
3919                 }
3920
3921                 ieee80211_get_rates(sband, bss->supp_rates,
3922                                     bss->supp_rates_len,
3923                                     &rates, &basic_rates,
3924                                     &have_higher_than_11mbit,
3925                                     &min_rate, &min_rate_index);
3926
3927                 /*
3928                  * This used to be a workaround for basic rates missing
3929                  * in the association response frame. Now that we no
3930                  * longer use the basic rates from there, it probably
3931                  * doesn't happen any more, but keep the workaround so
3932                  * in case some *other* APs are buggy in different ways
3933                  * we can connect -- with a warning.
3934                  */
3935                 if (!basic_rates && min_rate_index >= 0) {
3936                         sdata_info(sdata,
3937                                    "No basic rates, using min rate instead\n");
3938                         basic_rates = BIT(min_rate_index);
3939                 }
3940
3941                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3942                 sdata->vif.bss_conf.basic_rates = basic_rates;
3943
3944                 /* cf. IEEE 802.11 9.2.12 */
3945                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3946                     have_higher_than_11mbit)
3947                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3948                 else
3949                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3950
3951                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3952
3953                 /* set timing information */
3954                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3955                 rcu_read_lock();
3956                 ies = rcu_dereference(cbss->beacon_ies);
3957                 if (ies) {
3958                         const u8 *tim_ie;
3959
3960                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3961                         sdata->vif.bss_conf.sync_device_ts =
3962                                 bss->device_ts_beacon;
3963                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3964                                                   ies->data, ies->len);
3965                         if (tim_ie && tim_ie[1] >= 2)
3966                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3967                         else
3968                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3969                 } else if (!(local->hw.flags &
3970                                         IEEE80211_HW_TIMING_BEACON_ONLY)) {
3971                         ies = rcu_dereference(cbss->proberesp_ies);
3972                         /* must be non-NULL since beacon IEs were NULL */
3973                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3974                         sdata->vif.bss_conf.sync_device_ts =
3975                                 bss->device_ts_presp;
3976                         sdata->vif.bss_conf.sync_dtim_count = 0;
3977                 } else {
3978                         sdata->vif.bss_conf.sync_tsf = 0;
3979                         sdata->vif.bss_conf.sync_device_ts = 0;
3980                         sdata->vif.bss_conf.sync_dtim_count = 0;
3981                 }
3982                 rcu_read_unlock();
3983
3984                 /* tell driver about BSSID, basic rates and timing */
3985                 ieee80211_bss_info_change_notify(sdata,
3986                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3987                         BSS_CHANGED_BEACON_INT);
3988
3989                 if (assoc)
3990                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3991
3992                 err = sta_info_insert(new_sta);
3993                 new_sta = NULL;
3994                 if (err) {
3995                         sdata_info(sdata,
3996                                    "failed to insert STA entry for the AP (error %d)\n",
3997                                    err);
3998                         return err;
3999                 }
4000         } else
4001                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4002
4003         return 0;
4004 }
4005
4006 /* config hooks */
4007 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4008                        struct cfg80211_auth_request *req)
4009 {
4010         struct ieee80211_local *local = sdata->local;
4011         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4012         struct ieee80211_mgd_auth_data *auth_data;
4013         u16 auth_alg;
4014         int err;
4015
4016         /* prepare auth data structure */
4017
4018         switch (req->auth_type) {
4019         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4020                 auth_alg = WLAN_AUTH_OPEN;
4021                 break;
4022         case NL80211_AUTHTYPE_SHARED_KEY:
4023                 if (IS_ERR(local->wep_tx_tfm))
4024                         return -EOPNOTSUPP;
4025                 auth_alg = WLAN_AUTH_SHARED_KEY;
4026                 break;
4027         case NL80211_AUTHTYPE_FT:
4028                 auth_alg = WLAN_AUTH_FT;
4029                 break;
4030         case NL80211_AUTHTYPE_NETWORK_EAP:
4031                 auth_alg = WLAN_AUTH_LEAP;
4032                 break;
4033         case NL80211_AUTHTYPE_SAE:
4034                 auth_alg = WLAN_AUTH_SAE;
4035                 break;
4036         default:
4037                 return -EOPNOTSUPP;
4038         }
4039
4040         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4041                             req->ie_len, GFP_KERNEL);
4042         if (!auth_data)
4043                 return -ENOMEM;
4044
4045         auth_data->bss = req->bss;
4046
4047         if (req->sae_data_len >= 4) {
4048                 __le16 *pos = (__le16 *) req->sae_data;
4049                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4050                 auth_data->sae_status = le16_to_cpu(pos[1]);
4051                 memcpy(auth_data->data, req->sae_data + 4,
4052                        req->sae_data_len - 4);
4053                 auth_data->data_len += req->sae_data_len - 4;
4054         }
4055
4056         if (req->ie && req->ie_len) {
4057                 memcpy(&auth_data->data[auth_data->data_len],
4058                        req->ie, req->ie_len);
4059                 auth_data->data_len += req->ie_len;
4060         }
4061
4062         if (req->key && req->key_len) {
4063                 auth_data->key_len = req->key_len;
4064                 auth_data->key_idx = req->key_idx;
4065                 memcpy(auth_data->key, req->key, req->key_len);
4066         }
4067
4068         auth_data->algorithm = auth_alg;
4069
4070         /* try to authenticate/probe */
4071
4072         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4073             ifmgd->assoc_data) {
4074                 err = -EBUSY;
4075                 goto err_free;
4076         }
4077
4078         if (ifmgd->auth_data)
4079                 ieee80211_destroy_auth_data(sdata, false);
4080
4081         /* prep auth_data so we don't go into idle on disassoc */
4082         ifmgd->auth_data = auth_data;
4083
4084         if (ifmgd->associated) {
4085                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4086
4087                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4088                                        WLAN_REASON_UNSPECIFIED,
4089                                        false, frame_buf);
4090
4091                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4092                                       sizeof(frame_buf));
4093         }
4094
4095         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4096
4097         err = ieee80211_prep_connection(sdata, req->bss, false);
4098         if (err)
4099                 goto err_clear;
4100
4101         err = ieee80211_probe_auth(sdata);
4102         if (err) {
4103                 sta_info_destroy_addr(sdata, req->bss->bssid);
4104                 goto err_clear;
4105         }
4106
4107         /* hold our own reference */
4108         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4109         return 0;
4110
4111  err_clear:
4112         memset(ifmgd->bssid, 0, ETH_ALEN);
4113         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4114         ifmgd->auth_data = NULL;
4115  err_free:
4116         kfree(auth_data);
4117         return err;
4118 }
4119
4120 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4121                         struct cfg80211_assoc_request *req)
4122 {
4123         struct ieee80211_local *local = sdata->local;
4124         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4125         struct ieee80211_bss *bss = (void *)req->bss->priv;
4126         struct ieee80211_mgd_assoc_data *assoc_data;
4127         const struct cfg80211_bss_ies *beacon_ies;
4128         struct ieee80211_supported_band *sband;
4129         const u8 *ssidie, *ht_ie, *vht_ie;
4130         int i, err;
4131
4132         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4133         if (!assoc_data)
4134                 return -ENOMEM;
4135
4136         rcu_read_lock();
4137         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4138         if (!ssidie) {
4139                 rcu_read_unlock();
4140                 kfree(assoc_data);
4141                 return -EINVAL;
4142         }
4143         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4144         assoc_data->ssid_len = ssidie[1];
4145         rcu_read_unlock();
4146
4147         if (ifmgd->associated) {
4148                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4149
4150                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4151                                        WLAN_REASON_UNSPECIFIED,
4152                                        false, frame_buf);
4153
4154                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4155                                       sizeof(frame_buf));
4156         }
4157
4158         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4159                 err = -EBUSY;
4160                 goto err_free;
4161         }
4162
4163         if (ifmgd->assoc_data) {
4164                 err = -EBUSY;
4165                 goto err_free;
4166         }
4167
4168         if (ifmgd->auth_data) {
4169                 bool match;
4170
4171                 /* keep sta info, bssid if matching */
4172                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4173                 ieee80211_destroy_auth_data(sdata, match);
4174         }
4175
4176         /* prepare assoc data */
4177
4178         ifmgd->beacon_crc_valid = false;
4179
4180         /*
4181          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4182          * We still associate in non-HT mode (11a/b/g) if any one of these
4183          * ciphers is configured as pairwise.
4184          * We can set this to true for non-11n hardware, that'll be checked
4185          * separately along with the peer capabilities.
4186          */
4187         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4188                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4189                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4190                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4191                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4192                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4193                         netdev_info(sdata->dev,
4194                                     "disabling HT/VHT due to WEP/TKIP use\n");
4195                 }
4196         }
4197
4198         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4199                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4200                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4201         }
4202
4203         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4204                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4205
4206         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4207         sband = local->hw.wiphy->bands[req->bss->channel->band];
4208         if (!sband->ht_cap.ht_supported ||
4209             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4210                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4211                 if (!bss->wmm_used)
4212                         netdev_info(sdata->dev,
4213                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4214         }
4215
4216         /* disable VHT if we don't support it or the AP doesn't use WMM */
4217         if (!sband->vht_cap.vht_supported ||
4218             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4219                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4220                 if (!bss->wmm_used)
4221                         netdev_info(sdata->dev,
4222                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4223         }
4224
4225         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4226         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4227                sizeof(ifmgd->ht_capa_mask));
4228
4229         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4230         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4231                sizeof(ifmgd->vht_capa_mask));
4232
4233         if (req->ie && req->ie_len) {
4234                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4235                 assoc_data->ie_len = req->ie_len;
4236         }
4237
4238         assoc_data->bss = req->bss;
4239
4240         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4241                 if (ifmgd->powersave)
4242                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4243                 else
4244                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4245         } else
4246                 sdata->smps_mode = ifmgd->req_smps;
4247
4248         assoc_data->capability = req->bss->capability;
4249         assoc_data->wmm = bss->wmm_used &&
4250                           (local->hw.queues >= IEEE80211_NUM_ACS);
4251         assoc_data->supp_rates = bss->supp_rates;
4252         assoc_data->supp_rates_len = bss->supp_rates_len;
4253
4254         rcu_read_lock();
4255         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4256         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4257                 assoc_data->ap_ht_param =
4258                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4259         else
4260                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4261         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4262         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4263                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4264                        sizeof(struct ieee80211_vht_cap));
4265         else
4266                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4267         rcu_read_unlock();
4268
4269         if (bss->wmm_used && bss->uapsd_supported &&
4270             (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4271             sdata->wmm_acm != 0xff) {
4272                 assoc_data->uapsd = true;
4273                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4274         } else {
4275                 assoc_data->uapsd = false;
4276                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4277         }
4278
4279         if (req->prev_bssid)
4280                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4281
4282         if (req->use_mfp) {
4283                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4284                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4285         } else {
4286                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4287                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4288         }
4289
4290         if (req->crypto.control_port)
4291                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4292         else
4293                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4294
4295         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4296         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4297
4298         /* kick off associate process */
4299
4300         ifmgd->assoc_data = assoc_data;
4301         ifmgd->dtim_period = 0;
4302         ifmgd->have_beacon = false;
4303
4304         err = ieee80211_prep_connection(sdata, req->bss, true);
4305         if (err)
4306                 goto err_clear;
4307
4308         rcu_read_lock();
4309         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4310
4311         if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4312             !beacon_ies) {
4313                 /*
4314                  * Wait up to one beacon interval ...
4315                  * should this be more if we miss one?
4316                  */
4317                 sdata_info(sdata, "waiting for beacon from %pM\n",
4318                            ifmgd->bssid);
4319                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4320                 assoc_data->timeout_started = true;
4321                 assoc_data->need_beacon = true;
4322         } else if (beacon_ies) {
4323                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4324                                                     beacon_ies->data,
4325                                                     beacon_ies->len);
4326                 u8 dtim_count = 0;
4327
4328                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4329                         const struct ieee80211_tim_ie *tim;
4330                         tim = (void *)(tim_ie + 2);
4331                         ifmgd->dtim_period = tim->dtim_period;
4332                         dtim_count = tim->dtim_count;
4333                 }
4334                 ifmgd->have_beacon = true;
4335                 assoc_data->timeout = jiffies;
4336                 assoc_data->timeout_started = true;
4337
4338                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4339                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4340                         sdata->vif.bss_conf.sync_device_ts =
4341                                 bss->device_ts_beacon;
4342                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4343                 }
4344         } else {
4345                 assoc_data->timeout = jiffies;
4346                 assoc_data->timeout_started = true;
4347         }
4348         rcu_read_unlock();
4349
4350         run_again(sdata, assoc_data->timeout);
4351
4352         if (bss->corrupt_data) {
4353                 char *corrupt_type = "data";
4354                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4355                         if (bss->corrupt_data &
4356                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4357                                 corrupt_type = "beacon and probe response";
4358                         else
4359                                 corrupt_type = "beacon";
4360                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4361                         corrupt_type = "probe response";
4362                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4363                            corrupt_type);
4364         }
4365
4366         return 0;
4367  err_clear:
4368         memset(ifmgd->bssid, 0, ETH_ALEN);
4369         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4370         ifmgd->assoc_data = NULL;
4371  err_free:
4372         kfree(assoc_data);
4373         return err;
4374 }
4375
4376 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4377                          struct cfg80211_deauth_request *req)
4378 {
4379         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4380         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4381         bool tx = !req->local_state_change;
4382         bool report_frame = false;
4383
4384         sdata_info(sdata,
4385                    "deauthenticating from %pM by local choice (reason=%d)\n",
4386                    req->bssid, req->reason_code);
4387
4388         if (ifmgd->auth_data) {
4389                 drv_mgd_prepare_tx(sdata->local, sdata);
4390                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4391                                                IEEE80211_STYPE_DEAUTH,
4392                                                req->reason_code, tx,
4393                                                frame_buf);
4394                 ieee80211_destroy_auth_data(sdata, false);
4395
4396                 report_frame = true;
4397                 goto out;
4398         }
4399
4400         if (ifmgd->associated &&
4401             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4402                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4403                                        req->reason_code, tx, frame_buf);
4404                 report_frame = true;
4405         }
4406
4407  out:
4408         if (report_frame)
4409                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4410                                       IEEE80211_DEAUTH_FRAME_LEN);
4411
4412         return 0;
4413 }
4414
4415 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4416                            struct cfg80211_disassoc_request *req)
4417 {
4418         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4419         u8 bssid[ETH_ALEN];
4420         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4421
4422         /*
4423          * cfg80211 should catch this ... but it's racy since
4424          * we can receive a disassoc frame, process it, hand it
4425          * to cfg80211 while that's in a locked section already
4426          * trying to tell us that the user wants to disconnect.
4427          */
4428         if (ifmgd->associated != req->bss)
4429                 return -ENOLINK;
4430
4431         sdata_info(sdata,
4432                    "disassociating from %pM by local choice (reason=%d)\n",
4433                    req->bss->bssid, req->reason_code);
4434
4435         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4436         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4437                                req->reason_code, !req->local_state_change,
4438                                frame_buf);
4439
4440         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4441                               IEEE80211_DEAUTH_FRAME_LEN);
4442
4443         return 0;
4444 }
4445
4446 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4447 {
4448         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4449
4450         /*
4451          * Make sure some work items will not run after this,
4452          * they will not do anything but might not have been
4453          * cancelled when disconnecting.
4454          */
4455         cancel_work_sync(&ifmgd->monitor_work);
4456         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4457         cancel_work_sync(&ifmgd->request_smps_work);
4458         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4459         cancel_work_sync(&ifmgd->chswitch_work);
4460
4461         sdata_lock(sdata);
4462         if (ifmgd->assoc_data) {
4463                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4464                 ieee80211_destroy_assoc_data(sdata, false);
4465                 cfg80211_assoc_timeout(sdata->dev, bss);
4466         }
4467         if (ifmgd->auth_data)
4468                 ieee80211_destroy_auth_data(sdata, false);
4469         del_timer_sync(&ifmgd->timer);
4470         sdata_unlock(sdata);
4471 }
4472
4473 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4474                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4475                                gfp_t gfp)
4476 {
4477         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4478
4479         trace_api_cqm_rssi_notify(sdata, rssi_event);
4480
4481         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4482 }
4483 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);