net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/delay.h>
  15 #include <linux/if_ether.h>
  16 #include <linux/skbuff.h>
  17 #include <linux/if_arp.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/moduleparam.h>
  20 #include <linux/rtnetlink.h>
  21 #include <linux/pm_qos.h>
  22 #include <linux/crc32.h>
  23 #include <linux/slab.h>
  24 #include <linux/export.h>
  25 #include <net/mac80211.h>
  26 #include <asm/unaligned.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "led.h"
  32
  33 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  34 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  35 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  36 #define IEEE80211_AUTH_MAX_TRIES        3
  37 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  38 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  39 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  40 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  41 #define IEEE80211_ASSOC_MAX_TRIES       3
  42
  43 static int max_nullfunc_tries = 2;
  44 module_param(max_nullfunc_tries, int, 0644);
  45 MODULE_PARM_DESC(max_nullfunc_tries,
  46                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  47
  48 static int max_probe_tries = 5;
  49 module_param(max_probe_tries, int, 0644);
  50 MODULE_PARM_DESC(max_probe_tries,
  51                  "Maximum probe tries before disconnecting (reason 4).");
  52
  53 /*
  54  * Beacon loss timeout is calculated as N frames times the
  55  * advertised beacon interval.  This may need to be somewhat
  56  * higher than what hardware might detect to account for
  57  * delays in the host processing frames. But since we also
  58  * probe on beacon miss before declaring the connection lost
  59  * default to what we want.
  60  */
  61 static int beacon_loss_count = 7;
  62 module_param(beacon_loss_count, int, 0644);
  63 MODULE_PARM_DESC(beacon_loss_count,
  64                  "Number of beacon intervals before we decide beacon was lost.");
  65
  66 /*
  67  * Time the connection can be idle before we probe
  68  * it to see if we can still talk to the AP.
  69  */
  70 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  71 /*
  72  * Time we wait for a probe response after sending
  73  * a probe request because of beacon loss or for
  74  * checking the connection still works.
  75  */
  76 static int probe_wait_ms = 500;
  77 module_param(probe_wait_ms, int, 0644);
  78 MODULE_PARM_DESC(probe_wait_ms,
  79                  "Maximum time(ms) to wait for probe response"
  80                  " before disconnecting (reason 4).");
  81
  82 /*
  83  * Weight given to the latest Beacon frame when calculating average signal
  84  * strength for Beacon frames received in the current BSS. This must be
  85  * between 1 and 15.
  86  */
  87 #define IEEE80211_SIGNAL_AVE_WEIGHT     3
  88
  89 /*
  90  * How many Beacon frames need to have been used in average signal strength
  91  * before starting to indicate signal change events.
  92  */
  93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  94
  95 /*
  96  * We can have multiple work items (and connection probing)
  97  * scheduling this timer, but we need to take care to only
  98  * reschedule it when it should fire _earlier_ than it was
  99  * asked for before, or if it's not pending right now. This
 100  * function ensures that. Note that it then is required to
 101  * run this function for all timeouts after the first one
 102  * has happened -- the work that runs from this timer will
 103  * do that.
 104  */
 105 static void run_again(struct ieee80211_sub_if_data *sdata,
 106                       unsigned long timeout)
 107 {
 108         sdata_assert_lock(sdata);
 109
 110         if (!timer_pending(&sdata->u.mgd.timer) ||
 111             time_before(timeout, sdata->u.mgd.timer.expires))
 112                 mod_timer(&sdata->u.mgd.timer, timeout);
 113 }
 114
 115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 116 {
 117         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 118                 return;
 119
 120         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 121                 return;
 122
 123         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 124                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 125 }
 126
 127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 128 {
 129         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 130
 131         if (unlikely(!sdata->u.mgd.associated))
 132                 return;
 133
 134         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 135                 return;
 136
 137         mod_timer(&sdata->u.mgd.conn_mon_timer,
 138                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 139
 140         ifmgd->probe_send_count = 0;
 141 }
 142
 143 static int ecw2cw(int ecw)
 144 {
 145         return (1 << ecw) - 1;
 146 }
 147
 148 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
 149 {
 150         u32 ret;
 151         int tmp;
 152
 153         switch (c->width) {
 154         case NL80211_CHAN_WIDTH_20:
 155                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
 156                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 157                 break;
 158         case NL80211_CHAN_WIDTH_40:
 159                 c->width = NL80211_CHAN_WIDTH_20;
 160                 c->center_freq1 = c->chan->center_freq;
 161                 ret = IEEE80211_STA_DISABLE_40MHZ |
 162                       IEEE80211_STA_DISABLE_VHT;
 163                 break;
 164         case NL80211_CHAN_WIDTH_80:
 165                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
 166                 /* n_P40 */
 167                 tmp /= 2;
 168                 /* freq_P40 */
 169                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
 170                 c->width = NL80211_CHAN_WIDTH_40;
 171                 ret = IEEE80211_STA_DISABLE_VHT;
 172                 break;
 173         case NL80211_CHAN_WIDTH_80P80:
 174                 c->center_freq2 = 0;
 175                 c->width = NL80211_CHAN_WIDTH_80;
 176                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
 177                       IEEE80211_STA_DISABLE_160MHZ;
 178                 break;
 179         case NL80211_CHAN_WIDTH_160:
 180                 /* n_P20 */
 181                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
 182                 /* n_P80 */
 183                 tmp /= 4;
 184                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
 185                 c->width = NL80211_CHAN_WIDTH_80;
 186                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
 187                       IEEE80211_STA_DISABLE_160MHZ;
 188                 break;
 189         default:
 190         case NL80211_CHAN_WIDTH_20_NOHT:
 191                 WARN_ON_ONCE(1);
 192                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
 193                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 194                 break;
 195         case NL80211_CHAN_WIDTH_5:
 196         case NL80211_CHAN_WIDTH_10:
 197                 WARN_ON_ONCE(1);
 198                 /* keep c->width */
 199                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 200                 break;
 201         }
 202
 203         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
 204
 205         return ret;
 206 }
 207
 208 static u32
 209 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 210                              struct ieee80211_supported_band *sband,
 211                              struct ieee80211_channel *channel,
 212                              const struct ieee80211_ht_operation *ht_oper,
 213                              const struct ieee80211_vht_operation *vht_oper,
 214                              struct cfg80211_chan_def *chandef, bool tracking)
 215 {
 216         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 217         struct cfg80211_chan_def vht_chandef;
 218         u32 ht_cfreq, ret;
 219
 220         chandef->chan = channel;
 221         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 222         chandef->center_freq1 = channel->center_freq;
 223         chandef->center_freq2 = 0;
 224
 225         if (!ht_oper || !sband->ht_cap.ht_supported) {
 226                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 227                 goto out;
 228         }
 229
 230         chandef->width = NL80211_CHAN_WIDTH_20;
 231
 232         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 233                                                   channel->band);
 234         /* check that channel matches the right operating channel */
 235         if (!tracking && channel->center_freq != ht_cfreq) {
 236                 /*
 237                  * It's possible that some APs are confused here;
 238                  * Netgear WNDR3700 sometimes reports 4 higher than
 239                  * the actual channel in association responses, but
 240                  * since we look at probe response/beacon data here
 241                  * it should be OK.
 242                  */
 243                 sdata_info(sdata,
 244                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 245                            channel->center_freq, ht_cfreq,
 246                            ht_oper->primary_chan, channel->band);
 247                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 248                 goto out;
 249         }
 250
 251         /* check 40 MHz support, if we have it */
 252         if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 253                 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 254                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 255                         chandef->width = NL80211_CHAN_WIDTH_40;
 256                         chandef->center_freq1 += 10;
 257                         break;
 258                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 259                         chandef->width = NL80211_CHAN_WIDTH_40;
 260                         chandef->center_freq1 -= 10;
 261                         break;
 262                 }
 263         } else {
 264                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 265                 ret = IEEE80211_STA_DISABLE_VHT;
 266                 /* also mark 40 MHz disabled */
 267                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 268                 goto out;
 269         }
 270
 271         if (!vht_oper || !sband->vht_cap.vht_supported) {
 272                 ret = IEEE80211_STA_DISABLE_VHT;
 273                 goto out;
 274         }
 275
 276         vht_chandef.chan = channel;
 277         vht_chandef.center_freq1 =
 278                 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
 279                                                channel->band);
 280         vht_chandef.center_freq2 = 0;
 281
 282         switch (vht_oper->chan_width) {
 283         case IEEE80211_VHT_CHANWIDTH_USE_HT:
 284                 vht_chandef.width = chandef->width;
 285                 break;
 286         case IEEE80211_VHT_CHANWIDTH_80MHZ:
 287                 vht_chandef.width = NL80211_CHAN_WIDTH_80;
 288                 break;
 289         case IEEE80211_VHT_CHANWIDTH_160MHZ:
 290                 vht_chandef.width = NL80211_CHAN_WIDTH_160;
 291                 break;
 292         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
 293                 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
 294                 vht_chandef.center_freq2 =
 295                         ieee80211_channel_to_frequency(
 296                                 vht_oper->center_freq_seg2_idx,
 297                                 channel->band);
 298                 break;
 299         default:
 300                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 301                         sdata_info(sdata,
 302                                    "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
 303                                    vht_oper->chan_width);
 304                 ret = IEEE80211_STA_DISABLE_VHT;
 305                 goto out;
 306         }
 307
 308         if (!cfg80211_chandef_valid(&vht_chandef)) {
 309                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 310                         sdata_info(sdata,
 311                                    "AP VHT information is invalid, disable VHT\n");
 312                 ret = IEEE80211_STA_DISABLE_VHT;
 313                 goto out;
 314         }
 315
 316         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 317                 ret = 0;
 318                 goto out;
 319         }
 320
 321         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 322                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 323                         sdata_info(sdata,
 324                                    "AP VHT information doesn't match HT, disable VHT\n");
 325                 ret = IEEE80211_STA_DISABLE_VHT;
 326                 goto out;
 327         }
 328
 329         *chandef = vht_chandef;
 330
 331         ret = 0;
 332
 333 out:
 334         /* don't print the message below for VHT mismatch if VHT is disabled */
 335         if (ret & IEEE80211_STA_DISABLE_VHT)
 336                 vht_chandef = *chandef;
 337
 338         /*
 339          * Ignore the DISABLED flag when we're already connected and only
 340          * tracking the APs beacon for bandwidth changes - otherwise we
 341          * might get disconnected here if we connect to an AP, update our
 342          * regulatory information based on the AP's country IE and the
 343          * information we have is wrong/outdated and disables the channel
 344          * that we're actually using for the connection to the AP.
 345          */
 346         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 347                                         tracking ? 0 :
 348                                                    IEEE80211_CHAN_DISABLED)) {
 349                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 350                         ret = IEEE80211_STA_DISABLE_HT |
 351                               IEEE80211_STA_DISABLE_VHT;
 352                         break;
 353                 }
 354
 355                 ret |= chandef_downgrade(chandef);
 356         }
 357
 358         if (chandef->width != vht_chandef.width && !tracking)
 359                 sdata_info(sdata,
 360                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 361
 362         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 363         return ret;
 364 }
 365
 366 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 367                                struct sta_info *sta,
 368                                const struct ieee80211_ht_operation *ht_oper,
 369                                const struct ieee80211_vht_operation *vht_oper,
 370                                const u8 *bssid, u32 *changed)
 371 {
 372         struct ieee80211_local *local = sdata->local;
 373         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 374         struct ieee80211_supported_band *sband;
 375         struct ieee80211_channel *chan;
 376         struct cfg80211_chan_def chandef;
 377         u16 ht_opmode;
 378         u32 flags;
 379         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 380         int ret;
 381
 382         /* if HT was/is disabled, don't track any bandwidth changes */
 383         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 384                 return 0;
 385
 386         /* don't check VHT if we associated as non-VHT station */
 387         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 388                 vht_oper = NULL;
 389
 390         if (WARN_ON_ONCE(!sta))
 391                 return -EINVAL;
 392
 393         chan = sdata->vif.bss_conf.chandef.chan;
 394         sband = local->hw.wiphy->bands[chan->band];
 395
 396         /* calculate new channel (type) based on HT/VHT operation IEs */
 397         flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
 398                                              vht_oper, &chandef, true);
 399
 400         /*
 401          * Downgrade the new channel if we associated with restricted
 402          * capabilities. For example, if we associated as a 20 MHz STA
 403          * to a 40 MHz AP (due to regulatory, capabilities or config
 404          * reasons) then switching to a 40 MHz channel now won't do us
 405          * any good -- we couldn't use it with the AP.
 406          */
 407         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 408             chandef.width == NL80211_CHAN_WIDTH_80P80)
 409                 flags |= chandef_downgrade(&chandef);
 410         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 411             chandef.width == NL80211_CHAN_WIDTH_160)
 412                 flags |= chandef_downgrade(&chandef);
 413         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 414             chandef.width > NL80211_CHAN_WIDTH_20)
 415                 flags |= chandef_downgrade(&chandef);
 416
 417         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 418                 return 0;
 419
 420         sdata_info(sdata,
 421                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 422                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 423                    chandef.center_freq1, chandef.center_freq2);
 424
 425         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 426                                       IEEE80211_STA_DISABLE_VHT |
 427                                       IEEE80211_STA_DISABLE_40MHZ |
 428                                       IEEE80211_STA_DISABLE_80P80MHZ |
 429                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 430             !cfg80211_chandef_valid(&chandef)) {
 431                 sdata_info(sdata,
 432                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 433                            ifmgd->bssid);
 434                 return -EINVAL;
 435         }
 436
 437         switch (chandef.width) {
 438         case NL80211_CHAN_WIDTH_20_NOHT:
 439         case NL80211_CHAN_WIDTH_20:
 440                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 441                 break;
 442         case NL80211_CHAN_WIDTH_40:
 443                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 444                 break;
 445         case NL80211_CHAN_WIDTH_80:
 446                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 447                 break;
 448         case NL80211_CHAN_WIDTH_80P80:
 449         case NL80211_CHAN_WIDTH_160:
 450                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 451                 break;
 452         default:
 453                 return -EINVAL;
 454         }
 455
 456         if (new_sta_bw > sta->cur_max_bandwidth)
 457                 new_sta_bw = sta->cur_max_bandwidth;
 458
 459         if (new_sta_bw < sta->sta.bandwidth) {
 460                 sta->sta.bandwidth = new_sta_bw;
 461                 rate_control_rate_update(local, sband, sta,
 462                                          IEEE80211_RC_BW_CHANGED);
 463         }
 464
 465         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 466         if (ret) {
 467                 sdata_info(sdata,
 468                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 469                            ifmgd->bssid);
 470                 return ret;
 471         }
 472
 473         if (new_sta_bw > sta->sta.bandwidth) {
 474                 sta->sta.bandwidth = new_sta_bw;
 475                 rate_control_rate_update(local, sband, sta,
 476                                          IEEE80211_RC_BW_CHANGED);
 477         }
 478
 479         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 480
 481         /* if bss configuration changed store the new one */
 482         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 483                 *changed |= BSS_CHANGED_HT;
 484                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 485         }
 486
 487         return 0;
 488 }
 489
 490 /* frame sending functions */
 491
 492 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 493                                 struct sk_buff *skb, u8 ap_ht_param,
 494                                 struct ieee80211_supported_band *sband,
 495                                 struct ieee80211_channel *channel,
 496                                 enum ieee80211_smps_mode smps)
 497 {
 498         u8 *pos;
 499         u32 flags = channel->flags;
 500         u16 cap;
 501         struct ieee80211_sta_ht_cap ht_cap;
 502
 503         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 504
 505         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 506         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 507
 508         /* determine capability flags */
 509         cap = ht_cap.cap;
 510
 511         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 512         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 513                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 514                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 515                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 516                 }
 517                 break;
 518         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 519                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 520                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 521                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 522                 }
 523                 break;
 524         }
 525
 526         /*
 527          * If 40 MHz was disabled associate as though we weren't
 528          * capable of 40 MHz -- some broken APs will never fall
 529          * back to trying to transmit in 20 MHz.
 530          */
 531         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 532                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 533                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 534         }
 535
 536         /* set SM PS mode properly */
 537         cap &= ~IEEE80211_HT_CAP_SM_PS;
 538         switch (smps) {
 539         case IEEE80211_SMPS_AUTOMATIC:
 540         case IEEE80211_SMPS_NUM_MODES:
 541                 WARN_ON(1);
 542         case IEEE80211_SMPS_OFF:
 543                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 544                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 545                 break;
 546         case IEEE80211_SMPS_STATIC:
 547                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 548                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 549                 break;
 550         case IEEE80211_SMPS_DYNAMIC:
 551                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 552                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 553                 break;
 554         }
 555
 556         /* reserve and fill IE */
 557         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 558         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 559 }
 560
 561 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 562                                  struct sk_buff *skb,
 563                                  struct ieee80211_supported_band *sband,
 564                                  struct ieee80211_vht_cap *ap_vht_cap)
 565 {
 566         u8 *pos;
 567         u32 cap;
 568         struct ieee80211_sta_vht_cap vht_cap;
 569
 570         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 571
 572         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 573         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 574
 575         /* determine capability flags */
 576         cap = vht_cap.cap;
 577
 578         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 579                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
 580                 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 581         }
 582
 583         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 584                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 585                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 586         }
 587
 588         /*
 589          * Some APs apparently get confused if our capabilities are better
 590          * than theirs, so restrict what we advertise in the assoc request.
 591          */
 592         if (!(ap_vht_cap->vht_cap_info &
 593                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 594                 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
 595
 596         /* reserve and fill IE */
 597         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 598         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 599 }
 600
 601 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 602 {
 603         struct ieee80211_local *local = sdata->local;
 604         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 605         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 606         struct sk_buff *skb;
 607         struct ieee80211_mgmt *mgmt;
 608         u8 *pos, qos_info;
 609         size_t offset = 0, noffset;
 610         int i, count, rates_len, supp_rates_len, shift;
 611         u16 capab;
 612         struct ieee80211_supported_band *sband;
 613         struct ieee80211_chanctx_conf *chanctx_conf;
 614         struct ieee80211_channel *chan;
 615         u32 rate_flags, rates = 0;
 616
 617         sdata_assert_lock(sdata);
 618
 619         rcu_read_lock();
 620         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 621         if (WARN_ON(!chanctx_conf)) {
 622                 rcu_read_unlock();
 623                 return;
 624         }
 625         chan = chanctx_conf->def.chan;
 626         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 627         rcu_read_unlock();
 628         sband = local->hw.wiphy->bands[chan->band];
 629         shift = ieee80211_vif_get_shift(&sdata->vif);
 630
 631         if (assoc_data->supp_rates_len) {
 632                 /*
 633                  * Get all rates supported by the device and the AP as
 634                  * some APs don't like getting a superset of their rates
 635                  * in the association request (e.g. D-Link DAP 1353 in
 636                  * b-only mode)...
 637                  */
 638                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 639                                                      assoc_data->supp_rates,
 640                                                      assoc_data->supp_rates_len,
 641                                                      &rates);
 642         } else {
 643                 /*
 644                  * In case AP not provide any supported rates information
 645                  * before association, we send information element(s) with
 646                  * all rates that we support.
 647                  */
 648                 rates_len = 0;
 649                 for (i = 0; i < sband->n_bitrates; i++) {
 650                         if ((rate_flags & sband->bitrates[i].flags)
 651                             != rate_flags)
 652                                 continue;
 653                         rates |= BIT(i);
 654                         rates_len++;
 655                 }
 656         }
 657
 658         skb = alloc_skb(local->hw.extra_tx_headroom +
 659                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 660                         2 + assoc_data->ssid_len + /* SSID */
 661                         4 + rates_len + /* (extended) rates */
 662                         4 + /* power capability */
 663                         2 + 2 * sband->n_channels + /* supported channels */
 664                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 665                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 666                         assoc_data->ie_len + /* extra IEs */
 667                         9, /* WMM */
 668                         GFP_KERNEL);
 669         if (!skb)
 670                 return;
 671
 672         skb_reserve(skb, local->hw.extra_tx_headroom);
 673
 674         capab = WLAN_CAPABILITY_ESS;
 675
 676         if (sband->band == IEEE80211_BAND_2GHZ) {
 677                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 678                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 679                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 680                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 681         }
 682
 683         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 684                 capab |= WLAN_CAPABILITY_PRIVACY;
 685
 686         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 687             (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 688                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 689
 690         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 691         memset(mgmt, 0, 24);
 692         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 693         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 694         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 695
 696         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 697                 skb_put(skb, 10);
 698                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 699                                                   IEEE80211_STYPE_REASSOC_REQ);
 700                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 701                 mgmt->u.reassoc_req.listen_interval =
 702                                 cpu_to_le16(local->hw.conf.listen_interval);
 703                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 704                        ETH_ALEN);
 705         } else {
 706                 skb_put(skb, 4);
 707                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 708                                                   IEEE80211_STYPE_ASSOC_REQ);
 709                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 710                 mgmt->u.assoc_req.listen_interval =
 711                                 cpu_to_le16(local->hw.conf.listen_interval);
 712         }
 713
 714         /* SSID */
 715         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 716         *pos++ = WLAN_EID_SSID;
 717         *pos++ = assoc_data->ssid_len;
 718         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 719
 720         /* add all rates which were marked to be used above */
 721         supp_rates_len = rates_len;
 722         if (supp_rates_len > 8)
 723                 supp_rates_len = 8;
 724
 725         pos = skb_put(skb, supp_rates_len + 2);
 726         *pos++ = WLAN_EID_SUPP_RATES;
 727         *pos++ = supp_rates_len;
 728
 729         count = 0;
 730         for (i = 0; i < sband->n_bitrates; i++) {
 731                 if (BIT(i) & rates) {
 732                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 733                                                 5 * (1 << shift));
 734                         *pos++ = (u8) rate;
 735                         if (++count == 8)
 736                                 break;
 737                 }
 738         }
 739
 740         if (rates_len > count) {
 741                 pos = skb_put(skb, rates_len - count + 2);
 742                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 743                 *pos++ = rates_len - count;
 744
 745                 for (i++; i < sband->n_bitrates; i++) {
 746                         if (BIT(i) & rates) {
 747                                 int rate;
 748                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 749                                                     5 * (1 << shift));
 750                                 *pos++ = (u8) rate;
 751                         }
 752                 }
 753         }
 754
 755         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 756                 /* 1. power capabilities */
 757                 pos = skb_put(skb, 4);
 758                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 759                 *pos++ = 2;
 760                 *pos++ = 0; /* min tx power */
 761                  /* max tx power */
 762                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 763
 764                 /* 2. supported channels */
 765                 /* TODO: get this in reg domain format */
 766                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 767                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 768                 *pos++ = 2 * sband->n_channels;
 769                 for (i = 0; i < sband->n_channels; i++) {
 770                         *pos++ = ieee80211_frequency_to_channel(
 771                                         sband->channels[i].center_freq);
 772                         *pos++ = 1; /* one channel in the subband*/
 773                 }
 774         }
 775
 776         /* if present, add any custom IEs that go before HT */
 777         if (assoc_data->ie_len && assoc_data->ie) {
 778                 static const u8 before_ht[] = {
 779                         WLAN_EID_SSID,
 780                         WLAN_EID_SUPP_RATES,
 781                         WLAN_EID_EXT_SUPP_RATES,
 782                         WLAN_EID_PWR_CAPABILITY,
 783                         WLAN_EID_SUPPORTED_CHANNELS,
 784                         WLAN_EID_RSN,
 785                         WLAN_EID_QOS_CAPA,
 786                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 787                         WLAN_EID_MOBILITY_DOMAIN,
 788                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 789                 };
 790                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 791                                              before_ht, ARRAY_SIZE(before_ht),
 792                                              offset);
 793                 pos = skb_put(skb, noffset - offset);
 794                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 795                 offset = noffset;
 796         }
 797
 798         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 799                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 800                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 801
 802         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 803                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 804                                     sband, chan, sdata->smps_mode);
 805
 806         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 807                 ieee80211_add_vht_ie(sdata, skb, sband,
 808                                      &assoc_data->ap_vht_cap);
 809
 810         /* if present, add any custom non-vendor IEs that go after HT */
 811         if (assoc_data->ie_len && assoc_data->ie) {
 812                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 813                                                     assoc_data->ie_len,
 814                                                     offset);
 815                 pos = skb_put(skb, noffset - offset);
 816                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 817                 offset = noffset;
 818         }
 819
 820         if (assoc_data->wmm) {
 821                 if (assoc_data->uapsd) {
 822                         qos_info = ifmgd->uapsd_queues;
 823                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 824                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 825                 } else {
 826                         qos_info = 0;
 827                 }
 828
 829                 pos = skb_put(skb, 9);
 830                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 831                 *pos++ = 7; /* len */
 832                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 833                 *pos++ = 0x50;
 834                 *pos++ = 0xf2;
 835                 *pos++ = 2; /* WME */
 836                 *pos++ = 0; /* WME info */
 837                 *pos++ = 1; /* WME ver */
 838                 *pos++ = qos_info;
 839         }
 840
 841         /* add any remaining custom (i.e. vendor specific here) IEs */
 842         if (assoc_data->ie_len && assoc_data->ie) {
 843                 noffset = assoc_data->ie_len;
 844                 pos = skb_put(skb, noffset - offset);
 845                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 846         }
 847
 848         drv_mgd_prepare_tx(local, sdata);
 849
 850         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 851         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 852                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 853                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 854         ieee80211_tx_skb(sdata, skb);
 855 }
 856
 857 void ieee80211_send_pspoll(struct ieee80211_local *local,
 858                            struct ieee80211_sub_if_data *sdata)
 859 {
 860         struct ieee80211_pspoll *pspoll;
 861         struct sk_buff *skb;
 862
 863         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 864         if (!skb)
 865                 return;
 866
 867         pspoll = (struct ieee80211_pspoll *) skb->data;
 868         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 869
 870         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 871         ieee80211_tx_skb(sdata, skb);
 872 }
 873
 874 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 875                              struct ieee80211_sub_if_data *sdata,
 876                              int powersave)
 877 {
 878         struct sk_buff *skb;
 879         struct ieee80211_hdr_3addr *nullfunc;
 880         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 881
 882         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 883         if (!skb)
 884                 return;
 885
 886         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 887         if (powersave)
 888                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 889
 890         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 891                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 892
 893         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 894                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 895
 896         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
 897                             IEEE80211_STA_CONNECTION_POLL))
 898                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 899
 900         ieee80211_tx_skb(sdata, skb);
 901 }
 902
 903 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 904                                           struct ieee80211_sub_if_data *sdata)
 905 {
 906         struct sk_buff *skb;
 907         struct ieee80211_hdr *nullfunc;
 908         __le16 fc;
 909
 910         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 911                 return;
 912
 913         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 914         if (!skb)
 915                 return;
 916
 917         skb_reserve(skb, local->hw.extra_tx_headroom);
 918
 919         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 920         memset(nullfunc, 0, 30);
 921         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 922                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 923         nullfunc->frame_control = fc;
 924         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 925         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 926         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 927         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 928
 929         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 930         ieee80211_tx_skb(sdata, skb);
 931 }
 932
 933 /* spectrum management related things */
 934 static void ieee80211_chswitch_work(struct work_struct *work)
 935 {
 936         struct ieee80211_sub_if_data *sdata =
 937                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 938         struct ieee80211_local *local = sdata->local;
 939         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 940
 941         if (!ieee80211_sdata_running(sdata))
 942                 return;
 943
 944         sdata_lock(sdata);
 945         if (!ifmgd->associated)
 946                 goto out;
 947
 948         local->_oper_chandef = local->csa_chandef;
 949
 950         if (!local->ops->channel_switch) {
 951                 /* call "hw_config" only if doing sw channel switch */
 952                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
 953         } else {
 954                 /* update the device channel directly */
 955                 local->hw.conf.chandef = local->_oper_chandef;
 956         }
 957
 958         /* XXX: shouldn't really modify cfg80211-owned data! */
 959         ifmgd->associated->channel = local->_oper_chandef.chan;
 960
 961         /* XXX: wait for a beacon first? */
 962         ieee80211_wake_queues_by_reason(&local->hw,
 963                                         IEEE80211_MAX_QUEUE_MAP,
 964                                         IEEE80211_QUEUE_STOP_REASON_CSA);
 965  out:
 966         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
 967         sdata_unlock(sdata);
 968 }
 969
 970 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
 971 {
 972         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 973         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 974
 975         trace_api_chswitch_done(sdata, success);
 976         if (!success) {
 977                 sdata_info(sdata,
 978                            "driver channel switch failed, disconnecting\n");
 979                 ieee80211_queue_work(&sdata->local->hw,
 980                                      &ifmgd->csa_connection_drop_work);
 981         } else {
 982                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
 983         }
 984 }
 985 EXPORT_SYMBOL(ieee80211_chswitch_done);
 986
 987 static void ieee80211_chswitch_timer(unsigned long data)
 988 {
 989         struct ieee80211_sub_if_data *sdata =
 990                 (struct ieee80211_sub_if_data *) data;
 991
 992         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
 993 }
 994
 995 static void
 996 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 997                                  u64 timestamp, struct ieee802_11_elems *elems,
 998                                  bool beacon)
 999 {
1000         struct ieee80211_local *local = sdata->local;
1001         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1002         struct cfg80211_bss *cbss = ifmgd->associated;
1003         struct ieee80211_bss *bss;
1004         struct ieee80211_chanctx *chanctx;
1005         enum ieee80211_band new_band;
1006         int new_freq;
1007         u8 new_chan_no;
1008         u8 count;
1009         u8 mode;
1010         struct ieee80211_channel *new_chan;
1011         struct cfg80211_chan_def new_chandef = {};
1012         struct cfg80211_chan_def new_vht_chandef = {};
1013         const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1014         const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1015         const struct ieee80211_ht_operation *ht_oper;
1016         int secondary_channel_offset = -1;
1017
1018         sdata_assert_lock(sdata);
1019
1020         if (!cbss)
1021                 return;
1022
1023         if (local->scanning)
1024                 return;
1025
1026         /* disregard subsequent announcements if we are already processing */
1027         if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1028                 return;
1029
1030         sec_chan_offs = elems->sec_chan_offs;
1031         wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
1032         ht_oper = elems->ht_operation;
1033
1034         if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1035                             IEEE80211_STA_DISABLE_40MHZ)) {
1036                 sec_chan_offs = NULL;
1037                 wide_bw_chansw_ie = NULL;
1038                 /* only used for bandwidth here */
1039                 ht_oper = NULL;
1040         }
1041
1042         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1043                 wide_bw_chansw_ie = NULL;
1044
1045         if (elems->ext_chansw_ie) {
1046                 if (!ieee80211_operating_class_to_band(
1047                                 elems->ext_chansw_ie->new_operating_class,
1048                                 &new_band)) {
1049                         sdata_info(sdata,
1050                                    "cannot understand ECSA IE operating class %d, disconnecting\n",
1051                                    elems->ext_chansw_ie->new_operating_class);
1052                         ieee80211_queue_work(&local->hw,
1053                                              &ifmgd->csa_connection_drop_work);
1054                 }
1055                 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1056                 count = elems->ext_chansw_ie->count;
1057                 mode = elems->ext_chansw_ie->mode;
1058         } else if (elems->ch_switch_ie) {
1059                 new_band = cbss->channel->band;
1060                 new_chan_no = elems->ch_switch_ie->new_ch_num;
1061                 count = elems->ch_switch_ie->count;
1062                 mode = elems->ch_switch_ie->mode;
1063         } else {
1064                 /* nothing here we understand */
1065                 return;
1066         }
1067
1068         bss = (void *)cbss->priv;
1069
1070         new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
1071         new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1072         if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
1073                 sdata_info(sdata,
1074                            "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1075                            ifmgd->associated->bssid, new_freq);
1076                 ieee80211_queue_work(&local->hw,
1077                                      &ifmgd->csa_connection_drop_work);
1078                 return;
1079         }
1080
1081         if (!beacon && sec_chan_offs) {
1082                 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
1083         } else if (beacon && ht_oper) {
1084                 secondary_channel_offset =
1085                         ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
1086         } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
1087                 /*
1088                  * If it's not a beacon, HT is enabled and the IE not present,
1089                  * it's 20 MHz, 802.11-2012 8.5.2.6:
1090                  *      This element [the Secondary Channel Offset Element] is
1091                  *      present when switching to a 40 MHz channel. It may be
1092                  *      present when switching to a 20 MHz channel (in which
1093                  *      case the secondary channel offset is set to SCN).
1094                  */
1095                 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1096         }
1097
1098         switch (secondary_channel_offset) {
1099         default:
1100                 /* secondary_channel_offset was present but is invalid */
1101         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1102                 cfg80211_chandef_create(&new_chandef, new_chan,
1103                                         NL80211_CHAN_HT20);
1104                 break;
1105         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1106                 cfg80211_chandef_create(&new_chandef, new_chan,
1107                                         NL80211_CHAN_HT40PLUS);
1108                 break;
1109         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1110                 cfg80211_chandef_create(&new_chandef, new_chan,
1111                                         NL80211_CHAN_HT40MINUS);
1112                 break;
1113         case -1:
1114                 cfg80211_chandef_create(&new_chandef, new_chan,
1115                                         NL80211_CHAN_NO_HT);
1116                 break;
1117         }
1118
1119         if (wide_bw_chansw_ie) {
1120                 new_vht_chandef.chan = new_chan;
1121                 new_vht_chandef.center_freq1 =
1122                         ieee80211_channel_to_frequency(
1123                                 wide_bw_chansw_ie->new_center_freq_seg0,
1124                                 new_band);
1125
1126                 switch (wide_bw_chansw_ie->new_channel_width) {
1127                 default:
1128                         /* hmmm, ignore VHT and use HT if present */
1129                 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1130                         new_vht_chandef.chan = NULL;
1131                         break;
1132                 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1133                         new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1134                         break;
1135                 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1136                         new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1137                         break;
1138                 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1139                         /* field is otherwise reserved */
1140                         new_vht_chandef.center_freq2 =
1141                                 ieee80211_channel_to_frequency(
1142                                         wide_bw_chansw_ie->new_center_freq_seg1,
1143                                         new_band);
1144                         new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1145                         break;
1146                 }
1147                 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1148                     new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1149                         chandef_downgrade(&new_vht_chandef);
1150                 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1151                     new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1152                         chandef_downgrade(&new_vht_chandef);
1153                 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1154                     new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1155                         chandef_downgrade(&new_vht_chandef);
1156         }
1157
1158         /* if VHT data is there validate & use it */
1159         if (new_vht_chandef.chan) {
1160                 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1161                                                  &new_chandef)) {
1162                         sdata_info(sdata,
1163                                    "AP %pM CSA has inconsistent channel data, disconnecting\n",
1164                                    ifmgd->associated->bssid);
1165                         ieee80211_queue_work(&local->hw,
1166                                              &ifmgd->csa_connection_drop_work);
1167                         return;
1168                 }
1169                 new_chandef = new_vht_chandef;
1170         }
1171
1172         if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1173                                      IEEE80211_CHAN_DISABLED)) {
1174                 sdata_info(sdata,
1175                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1176                            ifmgd->associated->bssid, new_freq,
1177                            new_chandef.width, new_chandef.center_freq1,
1178                            new_chandef.center_freq2);
1179                 ieee80211_queue_work(&local->hw,
1180                                      &ifmgd->csa_connection_drop_work);
1181                 return;
1182         }
1183
1184         ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1185
1186         if (local->use_chanctx) {
1187                 sdata_info(sdata,
1188                            "not handling channel switch with channel contexts\n");
1189                 ieee80211_queue_work(&local->hw,
1190                                      &ifmgd->csa_connection_drop_work);
1191                 return;
1192         }
1193
1194         mutex_lock(&local->chanctx_mtx);
1195         if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1196                 mutex_unlock(&local->chanctx_mtx);
1197                 return;
1198         }
1199         chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1200                                struct ieee80211_chanctx, conf);
1201         if (chanctx->refcount > 1) {
1202                 sdata_info(sdata,
1203                            "channel switch with multiple interfaces on the same channel, disconnecting\n");
1204                 ieee80211_queue_work(&local->hw,
1205                                      &ifmgd->csa_connection_drop_work);
1206                 mutex_unlock(&local->chanctx_mtx);
1207                 return;
1208         }
1209         mutex_unlock(&local->chanctx_mtx);
1210
1211         local->csa_chandef = new_chandef;
1212
1213         if (mode)
1214                 ieee80211_stop_queues_by_reason(&local->hw,
1215                                 IEEE80211_MAX_QUEUE_MAP,
1216                                 IEEE80211_QUEUE_STOP_REASON_CSA);
1217
1218         if (local->ops->channel_switch) {
1219                 /* use driver's channel switch callback */
1220                 struct ieee80211_channel_switch ch_switch = {
1221                         .timestamp = timestamp,
1222                         .block_tx = mode,
1223                         .chandef = new_chandef,
1224                         .count = count,
1225                 };
1226
1227                 drv_channel_switch(local, &ch_switch);
1228                 return;
1229         }
1230
1231         /* channel switch handled in software */
1232         if (count <= 1)
1233                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1234         else
1235                 mod_timer(&ifmgd->chswitch_timer,
1236                           TU_TO_EXP_TIME(count * cbss->beacon_interval));
1237 }
1238
1239 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1240                                        struct ieee80211_channel *channel,
1241                                        const u8 *country_ie, u8 country_ie_len,
1242                                        const u8 *pwr_constr_elem)
1243 {
1244         struct ieee80211_country_ie_triplet *triplet;
1245         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1246         int i, chan_pwr, chan_increment, new_ap_level;
1247         bool have_chan_pwr = false;
1248
1249         /* Invalid IE */
1250         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1251                 return 0;
1252
1253         triplet = (void *)(country_ie + 3);
1254         country_ie_len -= 3;
1255
1256         switch (channel->band) {
1257         default:
1258                 WARN_ON_ONCE(1);
1259                 /* fall through */
1260         case IEEE80211_BAND_2GHZ:
1261         case IEEE80211_BAND_60GHZ:
1262                 chan_increment = 1;
1263                 break;
1264         case IEEE80211_BAND_5GHZ:
1265                 chan_increment = 4;
1266                 break;
1267         }
1268
1269         /* find channel */
1270         while (country_ie_len >= 3) {
1271                 u8 first_channel = triplet->chans.first_channel;
1272
1273                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1274                         goto next;
1275
1276                 for (i = 0; i < triplet->chans.num_channels; i++) {
1277                         if (first_channel + i * chan_increment == chan) {
1278                                 have_chan_pwr = true;
1279                                 chan_pwr = triplet->chans.max_power;
1280                                 break;
1281                         }
1282                 }
1283                 if (have_chan_pwr)
1284                         break;
1285
1286  next:
1287                 triplet++;
1288                 country_ie_len -= 3;
1289         }
1290
1291         if (!have_chan_pwr)
1292                 return 0;
1293
1294         new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1295
1296         if (sdata->ap_power_level == new_ap_level)
1297                 return 0;
1298
1299         sdata_info(sdata,
1300                    "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1301                    new_ap_level, chan_pwr, *pwr_constr_elem,
1302                    sdata->u.mgd.bssid);
1303         sdata->ap_power_level = new_ap_level;
1304         if (__ieee80211_recalc_txpower(sdata))
1305                 return BSS_CHANGED_TXPOWER;
1306         return 0;
1307 }
1308
1309 /* powersave */
1310 static void ieee80211_enable_ps(struct ieee80211_local *local,
1311                                 struct ieee80211_sub_if_data *sdata)
1312 {
1313         struct ieee80211_conf *conf = &local->hw.conf;
1314
1315         /*
1316          * If we are scanning right now then the parameters will
1317          * take effect when scan finishes.
1318          */
1319         if (local->scanning)
1320                 return;
1321
1322         if (conf->dynamic_ps_timeout > 0 &&
1323             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1324                 mod_timer(&local->dynamic_ps_timer, jiffies +
1325                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1326         } else {
1327                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1328                         ieee80211_send_nullfunc(local, sdata, 1);
1329
1330                 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1331                     (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1332                         return;
1333
1334                 conf->flags |= IEEE80211_CONF_PS;
1335                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1336         }
1337 }
1338
1339 static void ieee80211_change_ps(struct ieee80211_local *local)
1340 {
1341         struct ieee80211_conf *conf = &local->hw.conf;
1342
1343         if (local->ps_sdata) {
1344                 ieee80211_enable_ps(local, local->ps_sdata);
1345         } else if (conf->flags & IEEE80211_CONF_PS) {
1346                 conf->flags &= ~IEEE80211_CONF_PS;
1347                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1348                 del_timer_sync(&local->dynamic_ps_timer);
1349                 cancel_work_sync(&local->dynamic_ps_enable_work);
1350         }
1351 }
1352
1353 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1354 {
1355         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1356         struct sta_info *sta = NULL;
1357         bool authorized = false;
1358
1359         if (!mgd->powersave)
1360                 return false;
1361
1362         if (mgd->broken_ap)
1363                 return false;
1364
1365         if (!mgd->associated)
1366                 return false;
1367
1368         if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1369                           IEEE80211_STA_CONNECTION_POLL))
1370                 return false;
1371
1372         if (!mgd->have_beacon)
1373                 return false;
1374
1375         rcu_read_lock();
1376         sta = sta_info_get(sdata, mgd->bssid);
1377         if (sta)
1378                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1379         rcu_read_unlock();
1380
1381         return authorized;
1382 }
1383
1384 /* need to hold RTNL or interface lock */
1385 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1386 {
1387         struct ieee80211_sub_if_data *sdata, *found = NULL;
1388         int count = 0;
1389         int timeout;
1390
1391         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1392                 local->ps_sdata = NULL;
1393                 return;
1394         }
1395
1396         list_for_each_entry(sdata, &local->interfaces, list) {
1397                 if (!ieee80211_sdata_running(sdata))
1398                         continue;
1399                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1400                         /* If an AP vif is found, then disable PS
1401                          * by setting the count to zero thereby setting
1402                          * ps_sdata to NULL.
1403                          */
1404                         count = 0;
1405                         break;
1406                 }
1407                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1408                         continue;
1409                 found = sdata;
1410                 count++;
1411         }
1412
1413         if (count == 1 && ieee80211_powersave_allowed(found)) {
1414                 s32 beaconint_us;
1415
1416                 if (latency < 0)
1417                         latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1418
1419                 beaconint_us = ieee80211_tu_to_usec(
1420                                         found->vif.bss_conf.beacon_int);
1421
1422                 timeout = local->dynamic_ps_forced_timeout;
1423                 if (timeout < 0) {
1424                         /*
1425                          * Go to full PSM if the user configures a very low
1426                          * latency requirement.
1427                          * The 2000 second value is there for compatibility
1428                          * until the PM_QOS_NETWORK_LATENCY is configured
1429                          * with real values.
1430                          */
1431                         if (latency > (1900 * USEC_PER_MSEC) &&
1432                             latency != (2000 * USEC_PER_SEC))
1433                                 timeout = 0;
1434                         else
1435                                 timeout = 100;
1436                 }
1437                 local->hw.conf.dynamic_ps_timeout = timeout;
1438
1439                 if (beaconint_us > latency) {
1440                         local->ps_sdata = NULL;
1441                 } else {
1442                         int maxslp = 1;
1443                         u8 dtimper = found->u.mgd.dtim_period;
1444
1445                         /* If the TIM IE is invalid, pretend the value is 1 */
1446                         if (!dtimper)
1447                                 dtimper = 1;
1448                         else if (dtimper > 1)
1449                                 maxslp = min_t(int, dtimper,
1450                                                     latency / beaconint_us);
1451
1452                         local->hw.conf.max_sleep_period = maxslp;
1453                         local->hw.conf.ps_dtim_period = dtimper;
1454                         local->ps_sdata = found;
1455                 }
1456         } else {
1457                 local->ps_sdata = NULL;
1458         }
1459
1460         ieee80211_change_ps(local);
1461 }
1462
1463 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1464 {
1465         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1466
1467         if (sdata->vif.bss_conf.ps != ps_allowed) {
1468                 sdata->vif.bss_conf.ps = ps_allowed;
1469                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1470         }
1471 }
1472
1473 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1474 {
1475         struct ieee80211_local *local =
1476                 container_of(work, struct ieee80211_local,
1477                              dynamic_ps_disable_work);
1478
1479         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1480                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1481                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1482         }
1483
1484         ieee80211_wake_queues_by_reason(&local->hw,
1485                                         IEEE80211_MAX_QUEUE_MAP,
1486                                         IEEE80211_QUEUE_STOP_REASON_PS);
1487 }
1488
1489 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1490 {
1491         struct ieee80211_local *local =
1492                 container_of(work, struct ieee80211_local,
1493                              dynamic_ps_enable_work);
1494         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1495         struct ieee80211_if_managed *ifmgd;
1496         unsigned long flags;
1497         int q;
1498
1499         /* can only happen when PS was just disabled anyway */
1500         if (!sdata)
1501                 return;
1502
1503         ifmgd = &sdata->u.mgd;
1504
1505         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1506                 return;
1507
1508         if (local->hw.conf.dynamic_ps_timeout > 0) {
1509                 /* don't enter PS if TX frames are pending */
1510                 if (drv_tx_frames_pending(local)) {
1511                         mod_timer(&local->dynamic_ps_timer, jiffies +
1512                                   msecs_to_jiffies(
1513                                   local->hw.conf.dynamic_ps_timeout));
1514                         return;
1515                 }
1516
1517                 /*
1518                  * transmission can be stopped by others which leads to
1519                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1520                  * is not the actual idle state.
1521                  */
1522                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1523                 for (q = 0; q < local->hw.queues; q++) {
1524                         if (local->queue_stop_reasons[q]) {
1525                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1526                                                        flags);
1527                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1528                                           msecs_to_jiffies(
1529                                           local->hw.conf.dynamic_ps_timeout));
1530                                 return;
1531                         }
1532                 }
1533                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1534         }
1535
1536         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1537             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1538                 if (drv_tx_frames_pending(local)) {
1539                         mod_timer(&local->dynamic_ps_timer, jiffies +
1540                                   msecs_to_jiffies(
1541                                   local->hw.conf.dynamic_ps_timeout));
1542                 } else {
1543                         ieee80211_send_nullfunc(local, sdata, 1);
1544                         /* Flush to get the tx status of nullfunc frame */
1545                         ieee80211_flush_queues(local, sdata);
1546                 }
1547         }
1548
1549         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1550               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1551             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1552                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1553                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1554                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1555         }
1556 }
1557
1558 void ieee80211_dynamic_ps_timer(unsigned long data)
1559 {
1560         struct ieee80211_local *local = (void *) data;
1561
1562         if (local->quiescing || local->suspended)
1563                 return;
1564
1565         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1566 }
1567
1568 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1569 {
1570         struct delayed_work *delayed_work =
1571                 container_of(work, struct delayed_work, work);
1572         struct ieee80211_sub_if_data *sdata =
1573                 container_of(delayed_work, struct ieee80211_sub_if_data,
1574                              dfs_cac_timer_work);
1575
1576         ieee80211_vif_release_channel(sdata);
1577
1578         cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1579 }
1580
1581 /* MLME */
1582 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1583                                      struct ieee80211_sub_if_data *sdata,
1584                                      const u8 *wmm_param, size_t wmm_param_len)
1585 {
1586         struct ieee80211_tx_queue_params params;
1587         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1588         size_t left;
1589         int count;
1590         const u8 *pos;
1591         u8 uapsd_queues = 0;
1592
1593         if (!local->ops->conf_tx)
1594                 return false;
1595
1596         if (local->hw.queues < IEEE80211_NUM_ACS)
1597                 return false;
1598
1599         if (!wmm_param)
1600                 return false;
1601
1602         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1603                 return false;
1604
1605         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1606                 uapsd_queues = ifmgd->uapsd_queues;
1607
1608         count = wmm_param[6] & 0x0f;
1609         if (count == ifmgd->wmm_last_param_set)
1610                 return false;
1611         ifmgd->wmm_last_param_set = count;
1612
1613         pos = wmm_param + 8;
1614         left = wmm_param_len - 8;
1615
1616         memset(&params, 0, sizeof(params));
1617
1618         sdata->wmm_acm = 0;
1619         for (; left >= 4; left -= 4, pos += 4) {
1620                 int aci = (pos[0] >> 5) & 0x03;
1621                 int acm = (pos[0] >> 4) & 0x01;
1622                 bool uapsd = false;
1623                 int queue;
1624
1625                 switch (aci) {
1626                 case 1: /* AC_BK */
1627                         queue = 3;
1628                         if (acm)
1629                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1630                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1631                                 uapsd = true;
1632                         break;
1633                 case 2: /* AC_VI */
1634                         queue = 1;
1635                         if (acm)
1636                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1637                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1638                                 uapsd = true;
1639                         break;
1640                 case 3: /* AC_VO */
1641                         queue = 0;
1642                         if (acm)
1643                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1644                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1645                                 uapsd = true;
1646                         break;
1647                 case 0: /* AC_BE */
1648                 default:
1649                         queue = 2;
1650                         if (acm)
1651                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1652                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1653                                 uapsd = true;
1654                         break;
1655                 }
1656
1657                 params.aifs = pos[0] & 0x0f;
1658                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1659                 params.cw_min = ecw2cw(pos[1] & 0x0f);
1660                 params.txop = get_unaligned_le16(pos + 2);
1661                 params.acm = acm;
1662                 params.uapsd = uapsd;
1663
1664                 mlme_dbg(sdata,
1665                          "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1666                          queue, aci, acm,
1667                          params.aifs, params.cw_min, params.cw_max,
1668                          params.txop, params.uapsd);
1669                 sdata->tx_conf[queue] = params;
1670                 if (drv_conf_tx(local, sdata, queue, &params))
1671                         sdata_err(sdata,
1672                                   "failed to set TX queue parameters for queue %d\n",
1673                                   queue);
1674         }
1675
1676         /* enable WMM or activate new settings */
1677         sdata->vif.bss_conf.qos = true;
1678         return true;
1679 }
1680
1681 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1682 {
1683         lockdep_assert_held(&sdata->local->mtx);
1684
1685         sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1686                                 IEEE80211_STA_BEACON_POLL);
1687         ieee80211_run_deferred_scan(sdata->local);
1688 }
1689
1690 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1691 {
1692         mutex_lock(&sdata->local->mtx);
1693         __ieee80211_stop_poll(sdata);
1694         mutex_unlock(&sdata->local->mtx);
1695 }
1696
1697 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1698                                            u16 capab, bool erp_valid, u8 erp)
1699 {
1700         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1701         u32 changed = 0;
1702         bool use_protection;
1703         bool use_short_preamble;
1704         bool use_short_slot;
1705
1706         if (erp_valid) {
1707                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1708                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1709         } else {
1710                 use_protection = false;
1711                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1712         }
1713
1714         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1715         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1716                 use_short_slot = true;
1717
1718         if (use_protection != bss_conf->use_cts_prot) {
1719                 bss_conf->use_cts_prot = use_protection;
1720                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1721         }
1722
1723         if (use_short_preamble != bss_conf->use_short_preamble) {
1724                 bss_conf->use_short_preamble = use_short_preamble;
1725                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1726         }
1727
1728         if (use_short_slot != bss_conf->use_short_slot) {
1729                 bss_conf->use_short_slot = use_short_slot;
1730                 changed |= BSS_CHANGED_ERP_SLOT;
1731         }
1732
1733         return changed;
1734 }
1735
1736 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1737                                      struct cfg80211_bss *cbss,
1738                                      u32 bss_info_changed)
1739 {
1740         struct ieee80211_bss *bss = (void *)cbss->priv;
1741         struct ieee80211_local *local = sdata->local;
1742         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1743
1744         bss_info_changed |= BSS_CHANGED_ASSOC;
1745         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1746                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1747
1748         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1749                 beacon_loss_count * bss_conf->beacon_int));
1750
1751         sdata->u.mgd.associated = cbss;
1752         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1753
1754         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1755
1756         if (sdata->vif.p2p) {
1757                 const struct cfg80211_bss_ies *ies;
1758
1759                 rcu_read_lock();
1760                 ies = rcu_dereference(cbss->ies);
1761                 if (ies) {
1762                         int ret;
1763
1764                         ret = cfg80211_get_p2p_attr(
1765                                         ies->data, ies->len,
1766                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1767                                         (u8 *) &bss_conf->p2p_noa_attr,
1768                                         sizeof(bss_conf->p2p_noa_attr));
1769                         if (ret >= 2) {
1770                                 sdata->u.mgd.p2p_noa_index =
1771                                         bss_conf->p2p_noa_attr.index;
1772                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1773                         }
1774                 }
1775                 rcu_read_unlock();
1776         }
1777
1778         /* just to be sure */
1779         ieee80211_stop_poll(sdata);
1780
1781         ieee80211_led_assoc(local, 1);
1782
1783         if (sdata->u.mgd.have_beacon) {
1784                 /*
1785                  * If the AP is buggy we may get here with no DTIM period
1786                  * known, so assume it's 1 which is the only safe assumption
1787                  * in that case, although if the TIM IE is broken powersave
1788                  * probably just won't work at all.
1789                  */
1790                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1791                 bss_conf->beacon_rate = bss->beacon_rate;
1792                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1793         } else {
1794                 bss_conf->beacon_rate = NULL;
1795                 bss_conf->dtim_period = 0;
1796         }
1797
1798         bss_conf->assoc = 1;
1799
1800         /* Tell the driver to monitor connection quality (if supported) */
1801         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1802             bss_conf->cqm_rssi_thold)
1803                 bss_info_changed |= BSS_CHANGED_CQM;
1804
1805         /* Enable ARP filtering */
1806         if (bss_conf->arp_addr_cnt)
1807                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1808
1809         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1810
1811         mutex_lock(&local->iflist_mtx);
1812         ieee80211_recalc_ps(local, -1);
1813         mutex_unlock(&local->iflist_mtx);
1814
1815         ieee80211_recalc_smps(sdata);
1816         ieee80211_recalc_ps_vif(sdata);
1817
1818         netif_carrier_on(sdata->dev);
1819 }
1820
1821 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1822                                    u16 stype, u16 reason, bool tx,
1823                                    u8 *frame_buf)
1824 {
1825         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1826         struct ieee80211_local *local = sdata->local;
1827         u32 changed = 0;
1828
1829         sdata_assert_lock(sdata);
1830
1831         if (WARN_ON_ONCE(tx && !frame_buf))
1832                 return;
1833
1834         if (WARN_ON(!ifmgd->associated))
1835                 return;
1836
1837         ieee80211_stop_poll(sdata);
1838
1839         ifmgd->associated = NULL;
1840         netif_carrier_off(sdata->dev);
1841
1842         /*
1843          * if we want to get out of ps before disassoc (why?) we have
1844          * to do it before sending disassoc, as otherwise the null-packet
1845          * won't be valid.
1846          */
1847         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1848                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1849                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1850         }
1851         local->ps_sdata = NULL;
1852
1853         /* disable per-vif ps */
1854         ieee80211_recalc_ps_vif(sdata);
1855
1856         /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1857         if (tx)
1858                 ieee80211_flush_queues(local, sdata);
1859
1860         /* deauthenticate/disassociate now */
1861         if (tx || frame_buf)
1862                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1863                                                reason, tx, frame_buf);
1864
1865         /* flush out frame */
1866         if (tx)
1867                 ieee80211_flush_queues(local, sdata);
1868
1869         /* clear bssid only after building the needed mgmt frames */
1870         memset(ifmgd->bssid, 0, ETH_ALEN);
1871
1872         /* remove AP and TDLS peers */
1873         sta_info_flush_defer(sdata);
1874
1875         /* finally reset all BSS / config parameters */
1876         changed |= ieee80211_reset_erp_info(sdata);
1877
1878         ieee80211_led_assoc(local, 0);
1879         changed |= BSS_CHANGED_ASSOC;
1880         sdata->vif.bss_conf.assoc = false;
1881
1882         ifmgd->p2p_noa_index = -1;
1883         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1884                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1885
1886         /* on the next assoc, re-program HT/VHT parameters */
1887         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1888         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1889         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1890         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1891
1892         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1893
1894         del_timer_sync(&local->dynamic_ps_timer);
1895         cancel_work_sync(&local->dynamic_ps_enable_work);
1896
1897         /* Disable ARP filtering */
1898         if (sdata->vif.bss_conf.arp_addr_cnt)
1899                 changed |= BSS_CHANGED_ARP_FILTER;
1900
1901         sdata->vif.bss_conf.qos = false;
1902         changed |= BSS_CHANGED_QOS;
1903
1904         /* The BSSID (not really interesting) and HT changed */
1905         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1906         ieee80211_bss_info_change_notify(sdata, changed);
1907
1908         /* disassociated - set to defaults now */
1909         ieee80211_set_wmm_default(sdata, false);
1910
1911         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1912         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1913         del_timer_sync(&sdata->u.mgd.timer);
1914         del_timer_sync(&sdata->u.mgd.chswitch_timer);
1915
1916         sdata->vif.bss_conf.dtim_period = 0;
1917         sdata->vif.bss_conf.beacon_rate = NULL;
1918
1919         ifmgd->have_beacon = false;
1920
1921         ifmgd->flags = 0;
1922         ieee80211_vif_release_channel(sdata);
1923 }
1924
1925 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1926                              struct ieee80211_hdr *hdr)
1927 {
1928         /*
1929          * We can postpone the mgd.timer whenever receiving unicast frames
1930          * from AP because we know that the connection is working both ways
1931          * at that time. But multicast frames (and hence also beacons) must
1932          * be ignored here, because we need to trigger the timer during
1933          * data idle periods for sending the periodic probe request to the
1934          * AP we're connected to.
1935          */
1936         if (is_multicast_ether_addr(hdr->addr1))
1937                 return;
1938
1939         ieee80211_sta_reset_conn_monitor(sdata);
1940 }
1941
1942 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1943 {
1944         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1945         struct ieee80211_local *local = sdata->local;
1946
1947         mutex_lock(&local->mtx);
1948         if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1949                               IEEE80211_STA_CONNECTION_POLL))) {
1950                 mutex_unlock(&local->mtx);
1951                 return;
1952         }
1953
1954         __ieee80211_stop_poll(sdata);
1955
1956         mutex_lock(&local->iflist_mtx);
1957         ieee80211_recalc_ps(local, -1);
1958         mutex_unlock(&local->iflist_mtx);
1959
1960         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1961                 goto out;
1962
1963         /*
1964          * We've received a probe response, but are not sure whether
1965          * we have or will be receiving any beacons or data, so let's
1966          * schedule the timers again, just in case.
1967          */
1968         ieee80211_sta_reset_beacon_monitor(sdata);
1969
1970         mod_timer(&ifmgd->conn_mon_timer,
1971                   round_jiffies_up(jiffies +
1972                                    IEEE80211_CONNECTION_IDLE_TIME));
1973 out:
1974         mutex_unlock(&local->mtx);
1975 }
1976
1977 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1978                              struct ieee80211_hdr *hdr, bool ack)
1979 {
1980         if (!ieee80211_is_data(hdr->frame_control))
1981             return;
1982
1983         if (ieee80211_is_nullfunc(hdr->frame_control) &&
1984             sdata->u.mgd.probe_send_count > 0) {
1985                 if (ack)
1986                         ieee80211_sta_reset_conn_monitor(sdata);
1987                 else
1988                         sdata->u.mgd.nullfunc_failed = true;
1989                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1990                 return;
1991         }
1992
1993         if (ack)
1994                 ieee80211_sta_reset_conn_monitor(sdata);
1995 }
1996
1997 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1998 {
1999         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2000         const u8 *ssid;
2001         u8 *dst = ifmgd->associated->bssid;
2002         u8 unicast_limit = max(1, max_probe_tries - 3);
2003
2004         /*
2005          * Try sending broadcast probe requests for the last three
2006          * probe requests after the first ones failed since some
2007          * buggy APs only support broadcast probe requests.
2008          */
2009         if (ifmgd->probe_send_count >= unicast_limit)
2010                 dst = NULL;
2011
2012         /*
2013          * When the hardware reports an accurate Tx ACK status, it's
2014          * better to send a nullfunc frame instead of a probe request,
2015          * as it will kick us off the AP quickly if we aren't associated
2016          * anymore. The timeout will be reset if the frame is ACKed by
2017          * the AP.
2018          */
2019         ifmgd->probe_send_count++;
2020
2021         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2022                 ifmgd->nullfunc_failed = false;
2023                 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2024         } else {
2025                 int ssid_len;
2026
2027                 rcu_read_lock();
2028                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2029                 if (WARN_ON_ONCE(ssid == NULL))
2030                         ssid_len = 0;
2031                 else
2032                         ssid_len = ssid[1];
2033
2034                 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2035                                          0, (u32) -1, true, 0,
2036                                          ifmgd->associated->channel, false);
2037                 rcu_read_unlock();
2038         }
2039
2040         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2041         run_again(sdata, ifmgd->probe_timeout);
2042         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2043                 ieee80211_flush_queues(sdata->local, sdata);
2044 }
2045
2046 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2047                                    bool beacon)
2048 {
2049         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2050         bool already = false;
2051
2052         if (!ieee80211_sdata_running(sdata))
2053                 return;
2054
2055         sdata_lock(sdata);
2056
2057         if (!ifmgd->associated)
2058                 goto out;
2059
2060         mutex_lock(&sdata->local->mtx);
2061
2062         if (sdata->local->tmp_channel || sdata->local->scanning) {
2063                 mutex_unlock(&sdata->local->mtx);
2064                 goto out;
2065         }
2066
2067         if (beacon) {
2068                 mlme_dbg_ratelimited(sdata,
2069                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2070                                      beacon_loss_count);
2071
2072                 ieee80211_cqm_rssi_notify(&sdata->vif,
2073                                           NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2074                                           GFP_KERNEL);
2075         }
2076
2077         /*
2078          * The driver/our work has already reported this event or the
2079          * connection monitoring has kicked in and we have already sent
2080          * a probe request. Or maybe the AP died and the driver keeps
2081          * reporting until we disassociate...
2082          *
2083          * In either case we have to ignore the current call to this
2084          * function (except for setting the correct probe reason bit)
2085          * because otherwise we would reset the timer every time and
2086          * never check whether we received a probe response!
2087          */
2088         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2089                             IEEE80211_STA_CONNECTION_POLL))
2090                 already = true;
2091
2092         if (beacon)
2093                 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2094         else
2095                 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2096
2097         mutex_unlock(&sdata->local->mtx);
2098
2099         if (already)
2100                 goto out;
2101
2102         mutex_lock(&sdata->local->iflist_mtx);
2103         ieee80211_recalc_ps(sdata->local, -1);
2104         mutex_unlock(&sdata->local->iflist_mtx);
2105
2106         ifmgd->probe_send_count = 0;
2107         ieee80211_mgd_probe_ap_send(sdata);
2108  out:
2109         sdata_unlock(sdata);
2110 }
2111
2112 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2113                                           struct ieee80211_vif *vif)
2114 {
2115         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2116         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2117         struct cfg80211_bss *cbss;
2118         struct sk_buff *skb;
2119         const u8 *ssid;
2120         int ssid_len;
2121
2122         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2123                 return NULL;
2124
2125         sdata_assert_lock(sdata);
2126
2127         if (ifmgd->associated)
2128                 cbss = ifmgd->associated;
2129         else if (ifmgd->auth_data)
2130                 cbss = ifmgd->auth_data->bss;
2131         else if (ifmgd->assoc_data)
2132                 cbss = ifmgd->assoc_data->bss;
2133         else
2134                 return NULL;
2135
2136         rcu_read_lock();
2137         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2138         if (WARN_ON_ONCE(ssid == NULL))
2139                 ssid_len = 0;
2140         else
2141                 ssid_len = ssid[1];
2142
2143         skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2144                                         (u32) -1, cbss->channel,
2145                                         ssid + 2, ssid_len,
2146                                         NULL, 0, true);
2147         rcu_read_unlock();
2148
2149         return skb;
2150 }
2151 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2152
2153 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2154 {
2155         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2156         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2157
2158         sdata_lock(sdata);
2159         if (!ifmgd->associated) {
2160                 sdata_unlock(sdata);
2161                 return;
2162         }
2163
2164         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2165                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2166                                true, frame_buf);
2167         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2168         ieee80211_wake_queues_by_reason(&sdata->local->hw,
2169                                         IEEE80211_MAX_QUEUE_MAP,
2170                                         IEEE80211_QUEUE_STOP_REASON_CSA);
2171
2172         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2173                               IEEE80211_DEAUTH_FRAME_LEN);
2174         sdata_unlock(sdata);
2175 }
2176
2177 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2178 {
2179         struct ieee80211_sub_if_data *sdata =
2180                 container_of(work, struct ieee80211_sub_if_data,
2181                              u.mgd.beacon_connection_loss_work);
2182         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2183         struct sta_info *sta;
2184
2185         if (ifmgd->associated) {
2186                 rcu_read_lock();
2187                 sta = sta_info_get(sdata, ifmgd->bssid);
2188                 if (sta)
2189                         sta->beacon_loss_count++;
2190                 rcu_read_unlock();
2191         }
2192
2193         if (ifmgd->connection_loss) {
2194                 sdata_info(sdata, "Connection to AP %pM lost\n",
2195                            ifmgd->bssid);
2196                 __ieee80211_disconnect(sdata);
2197         } else {
2198                 ieee80211_mgd_probe_ap(sdata, true);
2199         }
2200 }
2201
2202 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2203 {
2204         struct ieee80211_sub_if_data *sdata =
2205                 container_of(work, struct ieee80211_sub_if_data,
2206                              u.mgd.csa_connection_drop_work);
2207
2208         __ieee80211_disconnect(sdata);
2209 }
2210
2211 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2212 {
2213         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2214         struct ieee80211_hw *hw = &sdata->local->hw;
2215
2216         trace_api_beacon_loss(sdata);
2217
2218         sdata->u.mgd.connection_loss = false;
2219         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2220 }
2221 EXPORT_SYMBOL(ieee80211_beacon_loss);
2222
2223 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2224 {
2225         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2226         struct ieee80211_hw *hw = &sdata->local->hw;
2227
2228         trace_api_connection_loss(sdata);
2229
2230         sdata->u.mgd.connection_loss = true;
2231         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2232 }
2233 EXPORT_SYMBOL(ieee80211_connection_loss);
2234
2235
2236 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2237                                         bool assoc)
2238 {
2239         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2240
2241         sdata_assert_lock(sdata);
2242
2243         if (!assoc) {
2244                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2245
2246                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2247                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2248                 sdata->u.mgd.flags = 0;
2249                 ieee80211_vif_release_channel(sdata);
2250         }
2251
2252         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2253         kfree(auth_data);
2254         sdata->u.mgd.auth_data = NULL;
2255 }
2256
2257 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2258                                      struct ieee80211_mgmt *mgmt, size_t len)
2259 {
2260         struct ieee80211_local *local = sdata->local;
2261         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2262         u8 *pos;
2263         struct ieee802_11_elems elems;
2264         u32 tx_flags = 0;
2265
2266         pos = mgmt->u.auth.variable;
2267         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2268         if (!elems.challenge)
2269                 return;
2270         auth_data->expected_transaction = 4;
2271         drv_mgd_prepare_tx(sdata->local, sdata);
2272         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2273                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2274                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2275         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2276                             elems.challenge - 2, elems.challenge_len + 2,
2277                             auth_data->bss->bssid, auth_data->bss->bssid,
2278                             auth_data->key, auth_data->key_len,
2279                             auth_data->key_idx, tx_flags);
2280 }
2281
2282 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2283                                    struct ieee80211_mgmt *mgmt, size_t len)
2284 {
2285         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2286         u8 bssid[ETH_ALEN];
2287         u16 auth_alg, auth_transaction, status_code;
2288         struct sta_info *sta;
2289
2290         sdata_assert_lock(sdata);
2291
2292         if (len < 24 + 6)
2293                 return;
2294
2295         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2296                 return;
2297
2298         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2299
2300         if (!ether_addr_equal(bssid, mgmt->bssid))
2301                 return;
2302
2303         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2304         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2305         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2306
2307         if (auth_alg != ifmgd->auth_data->algorithm ||
2308             auth_transaction != ifmgd->auth_data->expected_transaction) {
2309                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2310                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2311                            auth_transaction,
2312                            ifmgd->auth_data->expected_transaction);
2313                 return;
2314         }
2315
2316         if (status_code != WLAN_STATUS_SUCCESS) {
2317                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2318                            mgmt->sa, status_code);
2319                 ieee80211_destroy_auth_data(sdata, false);
2320                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2321                 return;
2322         }
2323
2324         switch (ifmgd->auth_data->algorithm) {
2325         case WLAN_AUTH_OPEN:
2326         case WLAN_AUTH_LEAP:
2327         case WLAN_AUTH_FT:
2328         case WLAN_AUTH_SAE:
2329                 break;
2330         case WLAN_AUTH_SHARED_KEY:
2331                 if (ifmgd->auth_data->expected_transaction != 4) {
2332                         ieee80211_auth_challenge(sdata, mgmt, len);
2333                         /* need another frame */
2334                         return;
2335                 }
2336                 break;
2337         default:
2338                 WARN_ONCE(1, "invalid auth alg %d",
2339                           ifmgd->auth_data->algorithm);
2340                 return;
2341         }
2342
2343         sdata_info(sdata, "authenticated\n");
2344         ifmgd->auth_data->done = true;
2345         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2346         ifmgd->auth_data->timeout_started = true;
2347         run_again(sdata, ifmgd->auth_data->timeout);
2348
2349         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2350             ifmgd->auth_data->expected_transaction != 2) {
2351                 /*
2352                  * Report auth frame to user space for processing since another
2353                  * round of Authentication frames is still needed.
2354                  */
2355                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2356                 return;
2357         }
2358
2359         /* move station state to auth */
2360         mutex_lock(&sdata->local->sta_mtx);
2361         sta = sta_info_get(sdata, bssid);
2362         if (!sta) {
2363                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2364                 goto out_err;
2365         }
2366         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2367                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2368                 goto out_err;
2369         }
2370         mutex_unlock(&sdata->local->sta_mtx);
2371
2372         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2373         return;
2374  out_err:
2375         mutex_unlock(&sdata->local->sta_mtx);
2376         /* ignore frame -- wait for timeout */
2377 }
2378
2379
2380 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2381                                      struct ieee80211_mgmt *mgmt, size_t len)
2382 {
2383         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2384         const u8 *bssid = NULL;
2385         u16 reason_code;
2386
2387         sdata_assert_lock(sdata);
2388
2389         if (len < 24 + 2)
2390                 return;
2391
2392         if (!ifmgd->associated ||
2393             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2394                 return;
2395
2396         bssid = ifmgd->associated->bssid;
2397
2398         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2399
2400         sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2401                    bssid, reason_code);
2402
2403         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2404
2405         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2406 }
2407
2408
2409 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2410                                        struct ieee80211_mgmt *mgmt, size_t len)
2411 {
2412         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2413         u16 reason_code;
2414
2415         sdata_assert_lock(sdata);
2416
2417         if (len < 24 + 2)
2418                 return;
2419
2420         if (!ifmgd->associated ||
2421             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2422                 return;
2423
2424         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2425
2426         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2427                    mgmt->sa, reason_code);
2428
2429         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2430
2431         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2432 }
2433
2434 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2435                                 u8 *supp_rates, unsigned int supp_rates_len,
2436                                 u32 *rates, u32 *basic_rates,
2437                                 bool *have_higher_than_11mbit,
2438                                 int *min_rate, int *min_rate_index,
2439                                 int shift, u32 rate_flags)
2440 {
2441         int i, j;
2442
2443         for (i = 0; i < supp_rates_len; i++) {
2444                 int rate = supp_rates[i] & 0x7f;
2445                 bool is_basic = !!(supp_rates[i] & 0x80);
2446
2447                 if ((rate * 5 * (1 << shift)) > 110)
2448                         *have_higher_than_11mbit = true;
2449
2450                 /*
2451                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2452                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2453                  *
2454                  * Note: Even through the membership selector and the basic
2455                  *       rate flag share the same bit, they are not exactly
2456                  *       the same.
2457                  */
2458                 if (!!(supp_rates[i] & 0x80) &&
2459                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2460                         continue;
2461
2462                 for (j = 0; j < sband->n_bitrates; j++) {
2463                         struct ieee80211_rate *br;
2464                         int brate;
2465
2466                         br = &sband->bitrates[j];
2467                         if ((rate_flags & br->flags) != rate_flags)
2468                                 continue;
2469
2470                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2471                         if (brate == rate) {
2472                                 *rates |= BIT(j);
2473                                 if (is_basic)
2474                                         *basic_rates |= BIT(j);
2475                                 if ((rate * 5) < *min_rate) {
2476                                         *min_rate = rate * 5;
2477                                         *min_rate_index = j;
2478                                 }
2479                                 break;
2480                         }
2481                 }
2482         }
2483 }
2484
2485 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2486                                          bool assoc)
2487 {
2488         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2489
2490         sdata_assert_lock(sdata);
2491
2492         if (!assoc) {
2493                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2494
2495                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2496                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2497                 sdata->u.mgd.flags = 0;
2498                 ieee80211_vif_release_channel(sdata);
2499         }
2500
2501         kfree(assoc_data);
2502         sdata->u.mgd.assoc_data = NULL;
2503 }
2504
2505 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2506                                     struct cfg80211_bss *cbss,
2507                                     struct ieee80211_mgmt *mgmt, size_t len)
2508 {
2509         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2510         struct ieee80211_local *local = sdata->local;
2511         struct ieee80211_supported_band *sband;
2512         struct sta_info *sta;
2513         u8 *pos;
2514         u16 capab_info, aid;
2515         struct ieee802_11_elems elems;
2516         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2517         const struct cfg80211_bss_ies *bss_ies = NULL;
2518         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2519         u32 changed = 0;
2520         int err;
2521         bool ret;
2522
2523         /* AssocResp and ReassocResp have identical structure */
2524
2525         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2526         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2527
2528         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2529                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2530                            aid);
2531         aid &= ~(BIT(15) | BIT(14));
2532
2533         ifmgd->broken_ap = false;
2534
2535         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2536                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2537                            aid);
2538                 aid = 0;
2539                 ifmgd->broken_ap = true;
2540         }
2541
2542         pos = mgmt->u.assoc_resp.variable;
2543         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2544
2545         if (!elems.supp_rates) {
2546                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2547                 return false;
2548         }
2549
2550         ifmgd->aid = aid;
2551
2552         /*
2553          * Some APs are erroneously not including some information in their
2554          * (re)association response frames. Try to recover by using the data
2555          * from the beacon or probe response. This seems to afflict mobile
2556          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2557          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2558          */
2559         if ((assoc_data->wmm && !elems.wmm_param) ||
2560             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2561              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2562             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2563              (!elems.vht_cap_elem || !elems.vht_operation))) {
2564                 const struct cfg80211_bss_ies *ies;
2565                 struct ieee802_11_elems bss_elems;
2566
2567                 rcu_read_lock();
2568                 ies = rcu_dereference(cbss->ies);
2569                 if (ies)
2570                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2571                                           GFP_ATOMIC);
2572                 rcu_read_unlock();
2573                 if (!bss_ies)
2574                         return false;
2575
2576                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2577                                        false, &bss_elems);
2578                 if (assoc_data->wmm &&
2579                     !elems.wmm_param && bss_elems.wmm_param) {
2580                         elems.wmm_param = bss_elems.wmm_param;
2581                         sdata_info(sdata,
2582                                    "AP bug: WMM param missing from AssocResp\n");
2583                 }
2584
2585                 /*
2586                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2587                  * have to include the IEs in the (re)association response.
2588                  */
2589                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2590                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2591                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2592                         sdata_info(sdata,
2593                                    "AP bug: HT capability missing from AssocResp\n");
2594                 }
2595                 if (!elems.ht_operation && bss_elems.ht_operation &&
2596                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2597                         elems.ht_operation = bss_elems.ht_operation;
2598                         sdata_info(sdata,
2599                                    "AP bug: HT operation missing from AssocResp\n");
2600                 }
2601                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2602                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2603                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2604                         sdata_info(sdata,
2605                                    "AP bug: VHT capa missing from AssocResp\n");
2606                 }
2607                 if (!elems.vht_operation && bss_elems.vht_operation &&
2608                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2609                         elems.vht_operation = bss_elems.vht_operation;
2610                         sdata_info(sdata,
2611                                    "AP bug: VHT operation missing from AssocResp\n");
2612                 }
2613         }
2614
2615         /*
2616          * We previously checked these in the beacon/probe response, so
2617          * they should be present here. This is just a safety net.
2618          */
2619         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2620             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2621                 sdata_info(sdata,
2622                            "HT AP is missing WMM params or HT capability/operation\n");
2623                 ret = false;
2624                 goto out;
2625         }
2626
2627         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2628             (!elems.vht_cap_elem || !elems.vht_operation)) {
2629                 sdata_info(sdata,
2630                            "VHT AP is missing VHT capability/operation\n");
2631                 ret = false;
2632                 goto out;
2633         }
2634
2635         mutex_lock(&sdata->local->sta_mtx);
2636         /*
2637          * station info was already allocated and inserted before
2638          * the association and should be available to us
2639          */
2640         sta = sta_info_get(sdata, cbss->bssid);
2641         if (WARN_ON(!sta)) {
2642                 mutex_unlock(&sdata->local->sta_mtx);
2643                 ret = false;
2644                 goto out;
2645         }
2646
2647         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2648
2649         /* Set up internal HT/VHT capabilities */
2650         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2651                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2652                                                   elems.ht_cap_elem, sta);
2653
2654         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2655                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2656                                                     elems.vht_cap_elem, sta);
2657
2658         /*
2659          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2660          * in their association response, so ignore that data for our own
2661          * configuration. If it changed since the last beacon, we'll get the
2662          * next beacon and update then.
2663          */
2664
2665         /*
2666          * If an operating mode notification IE is present, override the
2667          * NSS calculation (that would be done in rate_control_rate_init())
2668          * and use the # of streams from that element.
2669          */
2670         if (elems.opmode_notif &&
2671             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2672                 u8 nss;
2673
2674                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2675                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2676                 nss += 1;
2677                 sta->sta.rx_nss = nss;
2678         }
2679
2680         rate_control_rate_init(sta);
2681
2682         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2683                 set_sta_flag(sta, WLAN_STA_MFP);
2684
2685         if (elems.wmm_param)
2686                 set_sta_flag(sta, WLAN_STA_WME);
2687
2688         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2689         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2690                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2691         if (err) {
2692                 sdata_info(sdata,
2693                            "failed to move station %pM to desired state\n",
2694                            sta->sta.addr);
2695                 WARN_ON(__sta_info_destroy(sta));
2696                 mutex_unlock(&sdata->local->sta_mtx);
2697                 ret = false;
2698                 goto out;
2699         }
2700
2701         mutex_unlock(&sdata->local->sta_mtx);
2702
2703         /*
2704          * Always handle WMM once after association regardless
2705          * of the first value the AP uses. Setting -1 here has
2706          * that effect because the AP values is an unsigned
2707          * 4-bit value.
2708          */
2709         ifmgd->wmm_last_param_set = -1;
2710
2711         if (elems.wmm_param)
2712                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2713                                          elems.wmm_param_len);
2714         else
2715                 ieee80211_set_wmm_default(sdata, false);
2716         changed |= BSS_CHANGED_QOS;
2717
2718         /* set AID and assoc capability,
2719          * ieee80211_set_associated() will tell the driver */
2720         bss_conf->aid = aid;
2721         bss_conf->assoc_capability = capab_info;
2722         ieee80211_set_associated(sdata, cbss, changed);
2723
2724         /*
2725          * If we're using 4-addr mode, let the AP know that we're
2726          * doing so, so that it can create the STA VLAN on its side
2727          */
2728         if (ifmgd->use_4addr)
2729                 ieee80211_send_4addr_nullfunc(local, sdata);
2730
2731         /*
2732          * Start timer to probe the connection to the AP now.
2733          * Also start the timer that will detect beacon loss.
2734          */
2735         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2736         ieee80211_sta_reset_beacon_monitor(sdata);
2737
2738         ret = true;
2739  out:
2740         kfree(bss_ies);
2741         return ret;
2742 }
2743
2744 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2745                                          struct ieee80211_mgmt *mgmt,
2746                                          size_t len)
2747 {
2748         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2749         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2750         u16 capab_info, status_code, aid;
2751         struct ieee802_11_elems elems;
2752         u8 *pos;
2753         bool reassoc;
2754         struct cfg80211_bss *bss;
2755
2756         sdata_assert_lock(sdata);
2757
2758         if (!assoc_data)
2759                 return;
2760         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2761                 return;
2762
2763         /*
2764          * AssocResp and ReassocResp have identical structure, so process both
2765          * of them in this function.
2766          */
2767
2768         if (len < 24 + 6)
2769                 return;
2770
2771         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2772         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2773         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2774         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2775
2776         sdata_info(sdata,
2777                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2778                    reassoc ? "Rea" : "A", mgmt->sa,
2779                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2780
2781         pos = mgmt->u.assoc_resp.variable;
2782         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2783
2784         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2785             elems.timeout_int &&
2786             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2787                 u32 tu, ms;
2788                 tu = le32_to_cpu(elems.timeout_int->value);
2789                 ms = tu * 1024 / 1000;
2790                 sdata_info(sdata,
2791                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2792                            mgmt->sa, tu, ms);
2793                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2794                 assoc_data->timeout_started = true;
2795                 if (ms > IEEE80211_ASSOC_TIMEOUT)
2796                         run_again(sdata, assoc_data->timeout);
2797                 return;
2798         }
2799
2800         bss = assoc_data->bss;
2801
2802         if (status_code != WLAN_STATUS_SUCCESS) {
2803                 sdata_info(sdata, "%pM denied association (code=%d)\n",
2804                            mgmt->sa, status_code);
2805                 ieee80211_destroy_assoc_data(sdata, false);
2806         } else {
2807                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2808                         /* oops -- internal error -- send timeout for now */
2809                         ieee80211_destroy_assoc_data(sdata, false);
2810                         cfg80211_assoc_timeout(sdata->dev, bss);
2811                         return;
2812                 }
2813                 sdata_info(sdata, "associated\n");
2814
2815                 /*
2816                  * destroy assoc_data afterwards, as otherwise an idle
2817                  * recalc after assoc_data is NULL but before associated
2818                  * is set can cause the interface to go idle
2819                  */
2820                 ieee80211_destroy_assoc_data(sdata, true);
2821         }
2822
2823         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2824 }
2825
2826 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2827                                   struct ieee80211_mgmt *mgmt, size_t len,
2828                                   struct ieee80211_rx_status *rx_status,
2829                                   struct ieee802_11_elems *elems)
2830 {
2831         struct ieee80211_local *local = sdata->local;
2832         int freq;
2833         struct ieee80211_bss *bss;
2834         struct ieee80211_channel *channel;
2835
2836         sdata_assert_lock(sdata);
2837
2838         if (elems->ds_params)
2839                 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2840                                                       rx_status->band);
2841         else
2842                 freq = rx_status->freq;
2843
2844         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2845
2846         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2847                 return;
2848
2849         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2850                                         channel);
2851         if (bss) {
2852                 ieee80211_rx_bss_put(local, bss);
2853                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2854         }
2855
2856         if (!sdata->u.mgd.associated ||
2857             !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
2858                 return;
2859
2860         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2861                                          elems, true);
2862
2863 }
2864
2865
2866 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2867                                          struct sk_buff *skb)
2868 {
2869         struct ieee80211_mgmt *mgmt = (void *)skb->data;
2870         struct ieee80211_if_managed *ifmgd;
2871         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2872         size_t baselen, len = skb->len;
2873         struct ieee802_11_elems elems;
2874
2875         ifmgd = &sdata->u.mgd;
2876
2877         sdata_assert_lock(sdata);
2878
2879         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2880                 return; /* ignore ProbeResp to foreign address */
2881
2882         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2883         if (baselen > len)
2884                 return;
2885
2886         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2887                                false, &elems);
2888
2889         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2890
2891         if (ifmgd->associated &&
2892             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2893                 ieee80211_reset_ap_probe(sdata);
2894
2895         if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2896             ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2897                 /* got probe response, continue with auth */
2898                 sdata_info(sdata, "direct probe responded\n");
2899                 ifmgd->auth_data->tries = 0;
2900                 ifmgd->auth_data->timeout = jiffies;
2901                 ifmgd->auth_data->timeout_started = true;
2902                 run_again(sdata, ifmgd->auth_data->timeout);
2903         }
2904 }
2905
2906 /*
2907  * This is the canonical list of information elements we care about,
2908  * the filter code also gives us all changes to the Microsoft OUI
2909  * (00:50:F2) vendor IE which is used for WMM which we need to track.
2910  *
2911  * We implement beacon filtering in software since that means we can
2912  * avoid processing the frame here and in cfg80211, and userspace
2913  * will not be able to tell whether the hardware supports it or not.
2914  *
2915  * XXX: This list needs to be dynamic -- userspace needs to be able to
2916  *      add items it requires. It also needs to be able to tell us to
2917  *      look out for other vendor IEs.
2918  */
2919 static const u64 care_about_ies =
2920         (1ULL << WLAN_EID_COUNTRY) |
2921         (1ULL << WLAN_EID_ERP_INFO) |
2922         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2923         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2924         (1ULL << WLAN_EID_HT_CAPABILITY) |
2925         (1ULL << WLAN_EID_HT_OPERATION);
2926
2927 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2928                                      struct ieee80211_mgmt *mgmt, size_t len,
2929                                      struct ieee80211_rx_status *rx_status)
2930 {
2931         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2932         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2933         size_t baselen;
2934         struct ieee802_11_elems elems;
2935         struct ieee80211_local *local = sdata->local;
2936         struct ieee80211_chanctx_conf *chanctx_conf;
2937         struct ieee80211_channel *chan;
2938         struct sta_info *sta;
2939         u32 changed = 0;
2940         bool erp_valid;
2941         u8 erp_value = 0;
2942         u32 ncrc;
2943         u8 *bssid;
2944         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2945
2946         sdata_assert_lock(sdata);
2947
2948         /* Process beacon from the current BSS */
2949         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2950         if (baselen > len)
2951                 return;
2952
2953         rcu_read_lock();
2954         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2955         if (!chanctx_conf) {
2956                 rcu_read_unlock();
2957                 return;
2958         }
2959
2960         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2961                 rcu_read_unlock();
2962                 return;
2963         }
2964         chan = chanctx_conf->def.chan;
2965         rcu_read_unlock();
2966
2967         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2968             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2969                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2970                                        len - baselen, false, &elems);
2971
2972                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2973                 if (elems.tim && !elems.parse_error) {
2974                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
2975                         ifmgd->dtim_period = tim_ie->dtim_period;
2976                 }
2977                 ifmgd->have_beacon = true;
2978                 ifmgd->assoc_data->need_beacon = false;
2979                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2980                         sdata->vif.bss_conf.sync_tsf =
2981                                 le64_to_cpu(mgmt->u.beacon.timestamp);
2982                         sdata->vif.bss_conf.sync_device_ts =
2983                                 rx_status->device_timestamp;
2984                         if (elems.tim)
2985                                 sdata->vif.bss_conf.sync_dtim_count =
2986                                         elems.tim->dtim_count;
2987                         else
2988                                 sdata->vif.bss_conf.sync_dtim_count = 0;
2989                 }
2990                 /* continue assoc process */
2991                 ifmgd->assoc_data->timeout = jiffies;
2992                 ifmgd->assoc_data->timeout_started = true;
2993                 run_again(sdata, ifmgd->assoc_data->timeout);
2994                 return;
2995         }
2996
2997         if (!ifmgd->associated ||
2998             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2999                 return;
3000         bssid = ifmgd->associated->bssid;
3001
3002         /* Track average RSSI from the Beacon frames of the current AP */
3003         ifmgd->last_beacon_signal = rx_status->signal;
3004         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3005                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3006                 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3007                 ifmgd->last_cqm_event_signal = 0;
3008                 ifmgd->count_beacon_signal = 1;
3009                 ifmgd->last_ave_beacon_signal = 0;
3010         } else {
3011                 ifmgd->ave_beacon_signal =
3012                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3013                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3014                          ifmgd->ave_beacon_signal) / 16;
3015                 ifmgd->count_beacon_signal++;
3016         }
3017
3018         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3019             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3020                 int sig = ifmgd->ave_beacon_signal;
3021                 int last_sig = ifmgd->last_ave_beacon_signal;
3022
3023                 /*
3024                  * if signal crosses either of the boundaries, invoke callback
3025                  * with appropriate parameters
3026                  */
3027                 if (sig > ifmgd->rssi_max_thold &&
3028                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3029                         ifmgd->last_ave_beacon_signal = sig;
3030                         drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3031                 } else if (sig < ifmgd->rssi_min_thold &&
3032                            (last_sig >= ifmgd->rssi_max_thold ||
3033                            last_sig == 0)) {
3034                         ifmgd->last_ave_beacon_signal = sig;
3035                         drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3036                 }
3037         }
3038
3039         if (bss_conf->cqm_rssi_thold &&
3040             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3041             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3042                 int sig = ifmgd->ave_beacon_signal / 16;
3043                 int last_event = ifmgd->last_cqm_event_signal;
3044                 int thold = bss_conf->cqm_rssi_thold;
3045                 int hyst = bss_conf->cqm_rssi_hyst;
3046                 if (sig < thold &&
3047                     (last_event == 0 || sig < last_event - hyst)) {
3048                         ifmgd->last_cqm_event_signal = sig;
3049                         ieee80211_cqm_rssi_notify(
3050                                 &sdata->vif,
3051                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3052                                 GFP_KERNEL);
3053                 } else if (sig > thold &&
3054                            (last_event == 0 || sig > last_event + hyst)) {
3055                         ifmgd->last_cqm_event_signal = sig;
3056                         ieee80211_cqm_rssi_notify(
3057                                 &sdata->vif,
3058                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3059                                 GFP_KERNEL);
3060                 }
3061         }
3062
3063         if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
3064                 mlme_dbg_ratelimited(sdata,
3065                                      "cancelling AP probe due to a received beacon\n");
3066                 mutex_lock(&local->mtx);
3067                 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
3068                 ieee80211_run_deferred_scan(local);
3069                 mutex_unlock(&local->mtx);
3070
3071                 mutex_lock(&local->iflist_mtx);
3072                 ieee80211_recalc_ps(local, -1);
3073                 mutex_unlock(&local->iflist_mtx);
3074         }
3075
3076         /*
3077          * Push the beacon loss detection into the future since
3078          * we are processing a beacon from the AP just now.
3079          */
3080         ieee80211_sta_reset_beacon_monitor(sdata);
3081
3082         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3083         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3084                                           len - baselen, false, &elems,
3085                                           care_about_ies, ncrc);
3086
3087         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3088                 bool directed_tim = ieee80211_check_tim(elems.tim,
3089                                                         elems.tim_len,
3090                                                         ifmgd->aid);
3091                 if (directed_tim) {
3092                         if (local->hw.conf.dynamic_ps_timeout > 0) {
3093                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3094                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3095                                         ieee80211_hw_config(local,
3096                                                             IEEE80211_CONF_CHANGE_PS);
3097                                 }
3098                                 ieee80211_send_nullfunc(local, sdata, 0);
3099                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
3100                                 local->pspolling = true;
3101
3102                                 /*
3103                                  * Here is assumed that the driver will be
3104                                  * able to send ps-poll frame and receive a
3105                                  * response even though power save mode is
3106                                  * enabled, but some drivers might require
3107                                  * to disable power save here. This needs
3108                                  * to be investigated.
3109                                  */
3110                                 ieee80211_send_pspoll(local, sdata);
3111                         }
3112                 }
3113         }
3114
3115         if (sdata->vif.p2p) {
3116                 struct ieee80211_p2p_noa_attr noa = {};
3117                 int ret;
3118
3119                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3120                                             len - baselen,
3121                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3122                                             (u8 *) &noa, sizeof(noa));
3123                 if (ret >= 2) {
3124                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3125                                 /* valid noa_attr and index changed */
3126                                 sdata->u.mgd.p2p_noa_index = noa.index;
3127                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3128                                 changed |= BSS_CHANGED_P2P_PS;
3129                                 /*
3130                                  * make sure we update all information, the CRC
3131                                  * mechanism doesn't look at P2P attributes.
3132                                  */
3133                                 ifmgd->beacon_crc_valid = false;
3134                         }
3135                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3136                         /* noa_attr not found and we had valid noa_attr before */
3137                         sdata->u.mgd.p2p_noa_index = -1;
3138                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3139                         changed |= BSS_CHANGED_P2P_PS;
3140                         ifmgd->beacon_crc_valid = false;
3141                 }
3142         }
3143
3144         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3145                 return;
3146         ifmgd->beacon_crc = ncrc;
3147         ifmgd->beacon_crc_valid = true;
3148
3149         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3150
3151         if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3152                                      elems.wmm_param_len))
3153                 changed |= BSS_CHANGED_QOS;
3154
3155         /*
3156          * If we haven't had a beacon before, tell the driver about the
3157          * DTIM period (and beacon timing if desired) now.
3158          */
3159         if (!ifmgd->have_beacon) {
3160                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3161                 if (elems.tim)
3162                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3163                 else
3164                         bss_conf->dtim_period = 1;
3165
3166                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3167                         sdata->vif.bss_conf.sync_tsf =
3168                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3169                         sdata->vif.bss_conf.sync_device_ts =
3170                                 rx_status->device_timestamp;
3171                         if (elems.tim)
3172                                 sdata->vif.bss_conf.sync_dtim_count =
3173                                         elems.tim->dtim_count;
3174                         else
3175                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3176                 }
3177
3178                 changed |= BSS_CHANGED_BEACON_INFO;
3179                 ifmgd->have_beacon = true;
3180
3181                 mutex_lock(&local->iflist_mtx);
3182                 ieee80211_recalc_ps(local, -1);
3183                 mutex_unlock(&local->iflist_mtx);
3184
3185                 ieee80211_recalc_ps_vif(sdata);
3186         }
3187
3188         if (elems.erp_info) {
3189                 erp_valid = true;
3190                 erp_value = elems.erp_info[0];
3191         } else {
3192                 erp_valid = false;
3193         }
3194         changed |= ieee80211_handle_bss_capability(sdata,
3195                         le16_to_cpu(mgmt->u.beacon.capab_info),
3196                         erp_valid, erp_value);
3197
3198         mutex_lock(&local->sta_mtx);
3199         sta = sta_info_get(sdata, bssid);
3200
3201         if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3202                                 elems.vht_operation, bssid, &changed)) {
3203                 mutex_unlock(&local->sta_mtx);
3204                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3205                                        WLAN_REASON_DEAUTH_LEAVING,
3206                                        true, deauth_buf);
3207                 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3208                                       sizeof(deauth_buf));
3209                 return;
3210         }
3211
3212         if (sta && elems.opmode_notif)
3213                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3214                                             rx_status->band, true);
3215         mutex_unlock(&local->sta_mtx);
3216
3217         if (elems.country_elem && elems.pwr_constr_elem &&
3218             mgmt->u.probe_resp.capab_info &
3219                                 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3220                 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3221                                                        elems.country_elem,
3222                                                        elems.country_elem_len,
3223                                                        elems.pwr_constr_elem);
3224
3225         ieee80211_bss_info_change_notify(sdata, changed);
3226 }
3227
3228 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3229                                   struct sk_buff *skb)
3230 {
3231         struct ieee80211_rx_status *rx_status;
3232         struct ieee80211_mgmt *mgmt;
3233         u16 fc;
3234         struct ieee802_11_elems elems;
3235         int ies_len;
3236
3237         rx_status = (struct ieee80211_rx_status *) skb->cb;
3238         mgmt = (struct ieee80211_mgmt *) skb->data;
3239         fc = le16_to_cpu(mgmt->frame_control);
3240
3241         sdata_lock(sdata);
3242
3243         switch (fc & IEEE80211_FCTL_STYPE) {
3244         case IEEE80211_STYPE_BEACON:
3245                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3246                 break;
3247         case IEEE80211_STYPE_PROBE_RESP:
3248                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3249                 break;
3250         case IEEE80211_STYPE_AUTH:
3251                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3252                 break;
3253         case IEEE80211_STYPE_DEAUTH:
3254                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3255                 break;
3256         case IEEE80211_STYPE_DISASSOC:
3257                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3258                 break;
3259         case IEEE80211_STYPE_ASSOC_RESP:
3260         case IEEE80211_STYPE_REASSOC_RESP:
3261                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3262                 break;
3263         case IEEE80211_STYPE_ACTION:
3264                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3265                         ies_len = skb->len -
3266                                   offsetof(struct ieee80211_mgmt,
3267                                            u.action.u.chan_switch.variable);
3268
3269                         if (ies_len < 0)
3270                                 break;
3271
3272                         ieee802_11_parse_elems(
3273                                 mgmt->u.action.u.chan_switch.variable,
3274                                 ies_len, true, &elems);
3275
3276                         if (elems.parse_error)
3277                                 break;
3278
3279                         ieee80211_sta_process_chanswitch(sdata,
3280                                                          rx_status->mactime,
3281                                                          &elems, false);
3282                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3283                         ies_len = skb->len -
3284                                   offsetof(struct ieee80211_mgmt,
3285                                            u.action.u.ext_chan_switch.variable);
3286
3287                         if (ies_len < 0)
3288                                 break;
3289
3290                         ieee802_11_parse_elems(
3291                                 mgmt->u.action.u.ext_chan_switch.variable,
3292                                 ies_len, true, &elems);
3293
3294                         if (elems.parse_error)
3295                                 break;
3296
3297                         /* for the handling code pretend this was also an IE */
3298                         elems.ext_chansw_ie =
3299                                 &mgmt->u.action.u.ext_chan_switch.data;
3300
3301                         ieee80211_sta_process_chanswitch(sdata,
3302                                                          rx_status->mactime,
3303                                                          &elems, false);
3304                 }
3305                 break;
3306         }
3307         sdata_unlock(sdata);
3308 }
3309
3310 static void ieee80211_sta_timer(unsigned long data)
3311 {
3312         struct ieee80211_sub_if_data *sdata =
3313                 (struct ieee80211_sub_if_data *) data;
3314
3315         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3316 }
3317
3318 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3319                                           u8 *bssid, u8 reason, bool tx)
3320 {
3321         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3322
3323         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3324                                tx, frame_buf);
3325
3326         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3327                               IEEE80211_DEAUTH_FRAME_LEN);
3328 }
3329
3330 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3331 {
3332         struct ieee80211_local *local = sdata->local;
3333         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3334         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3335         u32 tx_flags = 0;
3336
3337         sdata_assert_lock(sdata);
3338
3339         if (WARN_ON_ONCE(!auth_data))
3340                 return -EINVAL;
3341
3342         auth_data->tries++;
3343
3344         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3345                 sdata_info(sdata, "authentication with %pM timed out\n",
3346                            auth_data->bss->bssid);
3347
3348                 /*
3349                  * Most likely AP is not in the range so remove the
3350                  * bss struct for that AP.
3351                  */
3352                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3353
3354                 return -ETIMEDOUT;
3355         }
3356
3357         drv_mgd_prepare_tx(local, sdata);
3358
3359         if (auth_data->bss->proberesp_ies) {
3360                 u16 trans = 1;
3361                 u16 status = 0;
3362
3363                 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3364                            auth_data->bss->bssid, auth_data->tries,
3365                            IEEE80211_AUTH_MAX_TRIES);
3366
3367                 auth_data->expected_transaction = 2;
3368
3369                 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3370                         trans = auth_data->sae_trans;
3371                         status = auth_data->sae_status;
3372                         auth_data->expected_transaction = trans;
3373                 }
3374
3375                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3376                         tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3377                                    IEEE80211_TX_INTFL_MLME_CONN_TX;
3378
3379                 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3380                                     auth_data->data, auth_data->data_len,
3381                                     auth_data->bss->bssid,
3382                                     auth_data->bss->bssid, NULL, 0, 0,
3383                                     tx_flags);
3384         } else {
3385                 const u8 *ssidie;
3386
3387                 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3388                            auth_data->bss->bssid, auth_data->tries,
3389                            IEEE80211_AUTH_MAX_TRIES);
3390
3391                 rcu_read_lock();
3392                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3393                 if (!ssidie) {
3394                         rcu_read_unlock();
3395                         return -EINVAL;
3396                 }
3397                 /*
3398                  * Direct probe is sent to broadcast address as some APs
3399                  * will not answer to direct packet in unassociated state.
3400                  */
3401                 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3402                                          NULL, 0, (u32) -1, true, 0,
3403                                          auth_data->bss->channel, false);
3404                 rcu_read_unlock();
3405         }
3406
3407         if (tx_flags == 0) {
3408                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3409                 auth_data->timeout_started = true;
3410                 run_again(sdata, auth_data->timeout);
3411         } else {
3412                 auth_data->timeout =
3413                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3414                 auth_data->timeout_started = true;
3415                 run_again(sdata, auth_data->timeout);
3416         }
3417
3418         return 0;
3419 }
3420
3421 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3422 {
3423         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3424         struct ieee80211_local *local = sdata->local;
3425
3426         sdata_assert_lock(sdata);
3427
3428         assoc_data->tries++;
3429         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3430                 sdata_info(sdata, "association with %pM timed out\n",
3431                            assoc_data->bss->bssid);
3432
3433                 /*
3434                  * Most likely AP is not in the range so remove the
3435                  * bss struct for that AP.
3436                  */
3437                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3438
3439                 return -ETIMEDOUT;
3440         }
3441
3442         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3443                    assoc_data->bss->bssid, assoc_data->tries,
3444                    IEEE80211_ASSOC_MAX_TRIES);
3445         ieee80211_send_assoc(sdata);
3446
3447         if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3448                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3449                 assoc_data->timeout_started = true;
3450                 run_again(sdata, assoc_data->timeout);
3451         } else {
3452                 assoc_data->timeout =
3453                         round_jiffies_up(jiffies +
3454                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3455                 assoc_data->timeout_started = true;
3456                 run_again(sdata, assoc_data->timeout);
3457         }
3458
3459         return 0;
3460 }
3461
3462 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3463                                   __le16 fc, bool acked)
3464 {
3465         struct ieee80211_local *local = sdata->local;
3466
3467         sdata->u.mgd.status_fc = fc;
3468         sdata->u.mgd.status_acked = acked;
3469         sdata->u.mgd.status_received = true;
3470
3471         ieee80211_queue_work(&local->hw, &sdata->work);
3472 }
3473
3474 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3475 {
3476         struct ieee80211_local *local = sdata->local;
3477         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3478
3479         sdata_lock(sdata);
3480
3481         if (ifmgd->status_received) {
3482                 __le16 fc = ifmgd->status_fc;
3483                 bool status_acked = ifmgd->status_acked;
3484
3485                 ifmgd->status_received = false;
3486                 if (ifmgd->auth_data &&
3487                     (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3488                         if (status_acked) {
3489                                 ifmgd->auth_data->timeout =
3490                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3491                                 run_again(sdata, ifmgd->auth_data->timeout);
3492                         } else {
3493                                 ifmgd->auth_data->timeout = jiffies - 1;
3494                         }
3495                         ifmgd->auth_data->timeout_started = true;
3496                 } else if (ifmgd->assoc_data &&
3497                            (ieee80211_is_assoc_req(fc) ||
3498                             ieee80211_is_reassoc_req(fc))) {
3499                         if (status_acked) {
3500                                 ifmgd->assoc_data->timeout =
3501                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3502                                 run_again(sdata, ifmgd->assoc_data->timeout);
3503                         } else {
3504                                 ifmgd->assoc_data->timeout = jiffies - 1;
3505                         }
3506                         ifmgd->assoc_data->timeout_started = true;
3507                 }
3508         }
3509
3510         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3511             time_after(jiffies, ifmgd->auth_data->timeout)) {
3512                 if (ifmgd->auth_data->done) {
3513                         /*
3514                          * ok ... we waited for assoc but userspace didn't,
3515                          * so let's just kill the auth data
3516                          */
3517                         ieee80211_destroy_auth_data(sdata, false);
3518                 } else if (ieee80211_probe_auth(sdata)) {
3519                         u8 bssid[ETH_ALEN];
3520
3521                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3522
3523                         ieee80211_destroy_auth_data(sdata, false);
3524
3525                         cfg80211_auth_timeout(sdata->dev, bssid);
3526                 }
3527         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3528                 run_again(sdata, ifmgd->auth_data->timeout);
3529
3530         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3531             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3532                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3533                     ieee80211_do_assoc(sdata)) {
3534                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3535
3536                         ieee80211_destroy_assoc_data(sdata, false);
3537                         cfg80211_assoc_timeout(sdata->dev, bss);
3538                 }
3539         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3540                 run_again(sdata, ifmgd->assoc_data->timeout);
3541
3542         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3543                             IEEE80211_STA_CONNECTION_POLL) &&
3544             ifmgd->associated) {
3545                 u8 bssid[ETH_ALEN];
3546                 int max_tries;
3547
3548                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3549
3550                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3551                         max_tries = max_nullfunc_tries;
3552                 else
3553                         max_tries = max_probe_tries;
3554
3555                 /* ACK received for nullfunc probing frame */
3556                 if (!ifmgd->probe_send_count)
3557                         ieee80211_reset_ap_probe(sdata);
3558                 else if (ifmgd->nullfunc_failed) {
3559                         if (ifmgd->probe_send_count < max_tries) {
3560                                 mlme_dbg(sdata,
3561                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3562                                          bssid, ifmgd->probe_send_count,
3563                                          max_tries);
3564                                 ieee80211_mgd_probe_ap_send(sdata);
3565                         } else {
3566                                 mlme_dbg(sdata,
3567                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3568                                          bssid);
3569                                 ieee80211_sta_connection_lost(sdata, bssid,
3570                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3571                                         false);
3572                         }
3573                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3574                         run_again(sdata, ifmgd->probe_timeout);
3575                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3576                         mlme_dbg(sdata,
3577                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3578                                  bssid, probe_wait_ms);
3579                         ieee80211_sta_connection_lost(sdata, bssid,
3580                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3581                 } else if (ifmgd->probe_send_count < max_tries) {
3582                         mlme_dbg(sdata,
3583                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3584                                  bssid, probe_wait_ms,
3585                                  ifmgd->probe_send_count, max_tries);
3586                         ieee80211_mgd_probe_ap_send(sdata);
3587                 } else {
3588                         /*
3589                          * We actually lost the connection ... or did we?
3590                          * Let's make sure!
3591                          */
3592                         wiphy_debug(local->hw.wiphy,
3593                                     "%s: No probe response from AP %pM"
3594                                     " after %dms, disconnecting.\n",
3595                                     sdata->name,
3596                                     bssid, probe_wait_ms);
3597
3598                         ieee80211_sta_connection_lost(sdata, bssid,
3599                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3600                 }
3601         }
3602
3603         sdata_unlock(sdata);
3604 }
3605
3606 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3607 {
3608         struct ieee80211_sub_if_data *sdata =
3609                 (struct ieee80211_sub_if_data *) data;
3610         struct ieee80211_local *local = sdata->local;
3611
3612         if (local->quiescing)
3613                 return;
3614
3615         sdata->u.mgd.connection_loss = false;
3616         ieee80211_queue_work(&sdata->local->hw,
3617                              &sdata->u.mgd.beacon_connection_loss_work);
3618 }
3619
3620 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3621 {
3622         struct ieee80211_sub_if_data *sdata =
3623                 (struct ieee80211_sub_if_data *) data;
3624         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3625         struct ieee80211_local *local = sdata->local;
3626
3627         if (local->quiescing)
3628                 return;
3629
3630         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3631 }
3632
3633 static void ieee80211_sta_monitor_work(struct work_struct *work)
3634 {
3635         struct ieee80211_sub_if_data *sdata =
3636                 container_of(work, struct ieee80211_sub_if_data,
3637                              u.mgd.monitor_work);
3638
3639         ieee80211_mgd_probe_ap(sdata, false);
3640 }
3641
3642 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3643 {
3644         u32 flags;
3645
3646         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3647                 __ieee80211_stop_poll(sdata);
3648
3649                 /* let's probe the connection once */
3650                 flags = sdata->local->hw.flags;
3651                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3652                         ieee80211_queue_work(&sdata->local->hw,
3653                                              &sdata->u.mgd.monitor_work);
3654                 /* and do all the other regular work too */
3655                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3656         }
3657 }
3658
3659 #ifdef CONFIG_PM
3660 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3661 {
3662         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3663
3664         sdata_lock(sdata);
3665         if (!ifmgd->associated) {
3666                 sdata_unlock(sdata);
3667                 return;
3668         }
3669
3670         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3671                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3672                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3673                 ieee80211_sta_connection_lost(sdata,
3674                                               ifmgd->associated->bssid,
3675                                               WLAN_REASON_UNSPECIFIED,
3676                                               true);
3677                 sdata_unlock(sdata);
3678                 return;
3679         }
3680         sdata_unlock(sdata);
3681 }
3682 #endif
3683
3684 /* interface setup */
3685 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3686 {
3687         struct ieee80211_if_managed *ifmgd;
3688
3689         ifmgd = &sdata->u.mgd;
3690         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3691         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3692         INIT_WORK(&ifmgd->beacon_connection_loss_work,
3693                   ieee80211_beacon_connection_loss_work);
3694         INIT_WORK(&ifmgd->csa_connection_drop_work,
3695                   ieee80211_csa_connection_drop_work);
3696         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3697         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3698                     (unsigned long) sdata);
3699         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3700                     (unsigned long) sdata);
3701         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3702                     (unsigned long) sdata);
3703         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3704                     (unsigned long) sdata);
3705
3706         ifmgd->flags = 0;
3707         ifmgd->powersave = sdata->wdev.ps;
3708         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3709         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3710         ifmgd->p2p_noa_index = -1;
3711
3712         if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3713                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3714         else
3715                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3716 }
3717
3718 /* scan finished notification */
3719 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3720 {
3721         struct ieee80211_sub_if_data *sdata;
3722
3723         /* Restart STA timers */
3724         rcu_read_lock();
3725         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3726                 if (ieee80211_sdata_running(sdata))
3727                         ieee80211_restart_sta_timer(sdata);
3728         }
3729         rcu_read_unlock();
3730 }
3731
3732 int ieee80211_max_network_latency(struct notifier_block *nb,
3733                                   unsigned long data, void *dummy)
3734 {
3735         s32 latency_usec = (s32) data;
3736         struct ieee80211_local *local =
3737                 container_of(nb, struct ieee80211_local,
3738                              network_latency_notifier);
3739
3740         mutex_lock(&local->iflist_mtx);
3741         ieee80211_recalc_ps(local, latency_usec);
3742         mutex_unlock(&local->iflist_mtx);
3743
3744         return 0;
3745 }
3746
3747 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3748                                      struct cfg80211_bss *cbss)
3749 {
3750         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3751         const u8 *ht_cap_ie, *vht_cap_ie;
3752         const struct ieee80211_ht_cap *ht_cap;
3753         const struct ieee80211_vht_cap *vht_cap;
3754         u8 chains = 1;
3755
3756         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3757                 return chains;
3758
3759         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3760         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3761                 ht_cap = (void *)(ht_cap_ie + 2);
3762                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3763                 /*
3764                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3765                  *       "Tx Unequal Modulation Supported" fields.
3766                  */
3767         }
3768
3769         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3770                 return chains;
3771
3772         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3773         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3774                 u8 nss;
3775                 u16 tx_mcs_map;
3776
3777                 vht_cap = (void *)(vht_cap_ie + 2);
3778                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3779                 for (nss = 8; nss > 0; nss--) {
3780                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3781                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
3782                                 break;
3783                 }
3784                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3785                 chains = max(chains, nss);
3786         }
3787
3788         return chains;
3789 }
3790
3791 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3792                                   struct cfg80211_bss *cbss)
3793 {
3794         struct ieee80211_local *local = sdata->local;
3795         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3796         const struct ieee80211_ht_operation *ht_oper = NULL;
3797         const struct ieee80211_vht_operation *vht_oper = NULL;
3798         struct ieee80211_supported_band *sband;
3799         struct cfg80211_chan_def chandef;
3800         int ret;
3801
3802         sband = local->hw.wiphy->bands[cbss->channel->band];
3803
3804         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3805                           IEEE80211_STA_DISABLE_80P80MHZ |
3806                           IEEE80211_STA_DISABLE_160MHZ);
3807
3808         rcu_read_lock();
3809
3810         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3811             sband->ht_cap.ht_supported) {
3812                 const u8 *ht_oper_ie, *ht_cap;
3813
3814                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3815                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3816                         ht_oper = (void *)(ht_oper_ie + 2);
3817
3818                 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3819                 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3820                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3821                         ht_oper = NULL;
3822                 }
3823         }
3824
3825         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3826             sband->vht_cap.vht_supported) {
3827                 const u8 *vht_oper_ie, *vht_cap;
3828
3829                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3830                                                    WLAN_EID_VHT_OPERATION);
3831                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3832                         vht_oper = (void *)(vht_oper_ie + 2);
3833                 if (vht_oper && !ht_oper) {
3834                         vht_oper = NULL;
3835                         sdata_info(sdata,
3836                                    "AP advertised VHT without HT, disabling both\n");
3837                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3838                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3839                 }
3840
3841                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3842                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3843                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3844                         vht_oper = NULL;
3845                 }
3846         }
3847
3848         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3849                                                      cbss->channel,
3850                                                      ht_oper, vht_oper,
3851                                                      &chandef, false);
3852
3853         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3854                                       local->rx_chains);
3855
3856         rcu_read_unlock();
3857
3858         /* will change later if needed */
3859         sdata->smps_mode = IEEE80211_SMPS_OFF;
3860
3861         /*
3862          * If this fails (possibly due to channel context sharing
3863          * on incompatible channels, e.g. 80+80 and 160 sharing the
3864          * same control channel) try to use a smaller bandwidth.
3865          */
3866         ret = ieee80211_vif_use_channel(sdata, &chandef,
3867                                         IEEE80211_CHANCTX_SHARED);
3868
3869         /* don't downgrade for 5 and 10 MHz channels, though. */
3870         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3871             chandef.width == NL80211_CHAN_WIDTH_10)
3872                 return ret;
3873
3874         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3875                 ifmgd->flags |= chandef_downgrade(&chandef);
3876                 ret = ieee80211_vif_use_channel(sdata, &chandef,
3877                                                 IEEE80211_CHANCTX_SHARED);
3878         }
3879         return ret;
3880 }
3881
3882 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3883                                      struct cfg80211_bss *cbss, bool assoc)
3884 {
3885         struct ieee80211_local *local = sdata->local;
3886         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3887         struct ieee80211_bss *bss = (void *)cbss->priv;
3888         struct sta_info *new_sta = NULL;
3889         bool have_sta = false;
3890         int err;
3891
3892         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3893                 return -EINVAL;
3894
3895         if (assoc) {
3896                 rcu_read_lock();
3897                 have_sta = sta_info_get(sdata, cbss->bssid);
3898                 rcu_read_unlock();
3899         }
3900
3901         if (!have_sta) {
3902                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3903                 if (!new_sta)
3904                         return -ENOMEM;
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_chanctx_conf *chanctx_conf;
3911                 struct ieee80211_supported_band *sband;
3912                 const struct cfg80211_bss_ies *ies;
3913                 int shift;
3914                 u32 rate_flags;
3915
3916                 sband = local->hw.wiphy->bands[cbss->channel->band];
3917
3918                 err = ieee80211_prep_channel(sdata, cbss);
3919                 if (err) {
3920                         sta_info_free(local, new_sta);
3921                         return -EINVAL;
3922                 }
3923                 shift = ieee80211_vif_get_shift(&sdata->vif);
3924
3925                 rcu_read_lock();
3926                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3927                 if (WARN_ON(!chanctx_conf)) {
3928                         rcu_read_unlock();
3929                         return -EINVAL;
3930                 }
3931                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3932                 rcu_read_unlock();
3933
3934                 ieee80211_get_rates(sband, bss->supp_rates,
3935                                     bss->supp_rates_len,
3936                                     &rates, &basic_rates,
3937                                     &have_higher_than_11mbit,
3938                                     &min_rate, &min_rate_index,
3939                                     shift, rate_flags);
3940
3941                 /*
3942                  * This used to be a workaround for basic rates missing
3943                  * in the association response frame. Now that we no
3944                  * longer use the basic rates from there, it probably
3945                  * doesn't happen any more, but keep the workaround so
3946                  * in case some *other* APs are buggy in different ways
3947                  * we can connect -- with a warning.
3948                  */
3949                 if (!basic_rates && min_rate_index >= 0) {
3950                         sdata_info(sdata,
3951                                    "No basic rates, using min rate instead\n");
3952                         basic_rates = BIT(min_rate_index);
3953                 }
3954
3955                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3956                 sdata->vif.bss_conf.basic_rates = basic_rates;
3957
3958                 /* cf. IEEE 802.11 9.2.12 */
3959                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3960                     have_higher_than_11mbit)
3961                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3962                 else
3963                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3964
3965                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3966
3967                 /* set timing information */
3968                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3969                 rcu_read_lock();
3970                 ies = rcu_dereference(cbss->beacon_ies);
3971                 if (ies) {
3972                         const u8 *tim_ie;
3973
3974                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3975                         sdata->vif.bss_conf.sync_device_ts =
3976                                 bss->device_ts_beacon;
3977                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3978                                                   ies->data, ies->len);
3979                         if (tim_ie && tim_ie[1] >= 2)
3980                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3981                         else
3982                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3983                 } else if (!(local->hw.flags &
3984                                         IEEE80211_HW_TIMING_BEACON_ONLY)) {
3985                         ies = rcu_dereference(cbss->proberesp_ies);
3986                         /* must be non-NULL since beacon IEs were NULL */
3987                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3988                         sdata->vif.bss_conf.sync_device_ts =
3989                                 bss->device_ts_presp;
3990                         sdata->vif.bss_conf.sync_dtim_count = 0;
3991                 } else {
3992                         sdata->vif.bss_conf.sync_tsf = 0;
3993                         sdata->vif.bss_conf.sync_device_ts = 0;
3994                         sdata->vif.bss_conf.sync_dtim_count = 0;
3995                 }
3996                 rcu_read_unlock();
3997
3998                 /* tell driver about BSSID, basic rates and timing */
3999                 ieee80211_bss_info_change_notify(sdata,
4000                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4001                         BSS_CHANGED_BEACON_INT);
4002
4003                 if (assoc)
4004                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4005
4006                 err = sta_info_insert(new_sta);
4007                 new_sta = NULL;
4008                 if (err) {
4009                         sdata_info(sdata,
4010                                    "failed to insert STA entry for the AP (error %d)\n",
4011                                    err);
4012                         return err;
4013                 }
4014         } else
4015                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4016
4017         return 0;
4018 }
4019
4020 /* config hooks */
4021 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4022                        struct cfg80211_auth_request *req)
4023 {
4024         struct ieee80211_local *local = sdata->local;
4025         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4026         struct ieee80211_mgd_auth_data *auth_data;
4027         u16 auth_alg;
4028         int err;
4029
4030         /* prepare auth data structure */
4031
4032         switch (req->auth_type) {
4033         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4034                 auth_alg = WLAN_AUTH_OPEN;
4035                 break;
4036         case NL80211_AUTHTYPE_SHARED_KEY:
4037                 if (IS_ERR(local->wep_tx_tfm))
4038                         return -EOPNOTSUPP;
4039                 auth_alg = WLAN_AUTH_SHARED_KEY;
4040                 break;
4041         case NL80211_AUTHTYPE_FT:
4042                 auth_alg = WLAN_AUTH_FT;
4043                 break;
4044         case NL80211_AUTHTYPE_NETWORK_EAP:
4045                 auth_alg = WLAN_AUTH_LEAP;
4046                 break;
4047         case NL80211_AUTHTYPE_SAE:
4048                 auth_alg = WLAN_AUTH_SAE;
4049                 break;
4050         default:
4051                 return -EOPNOTSUPP;
4052         }
4053
4054         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4055                             req->ie_len, GFP_KERNEL);
4056         if (!auth_data)
4057                 return -ENOMEM;
4058
4059         auth_data->bss = req->bss;
4060
4061         if (req->sae_data_len >= 4) {
4062                 __le16 *pos = (__le16 *) req->sae_data;
4063                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4064                 auth_data->sae_status = le16_to_cpu(pos[1]);
4065                 memcpy(auth_data->data, req->sae_data + 4,
4066                        req->sae_data_len - 4);
4067                 auth_data->data_len += req->sae_data_len - 4;
4068         }
4069
4070         if (req->ie && req->ie_len) {
4071                 memcpy(&auth_data->data[auth_data->data_len],
4072                        req->ie, req->ie_len);
4073                 auth_data->data_len += req->ie_len;
4074         }
4075
4076         if (req->key && req->key_len) {
4077                 auth_data->key_len = req->key_len;
4078                 auth_data->key_idx = req->key_idx;
4079                 memcpy(auth_data->key, req->key, req->key_len);
4080         }
4081
4082         auth_data->algorithm = auth_alg;
4083
4084         /* try to authenticate/probe */
4085
4086         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4087             ifmgd->assoc_data) {
4088                 err = -EBUSY;
4089                 goto err_free;
4090         }
4091
4092         if (ifmgd->auth_data)
4093                 ieee80211_destroy_auth_data(sdata, false);
4094
4095         /* prep auth_data so we don't go into idle on disassoc */
4096         ifmgd->auth_data = auth_data;
4097
4098         if (ifmgd->associated) {
4099                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4100
4101                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4102                                        WLAN_REASON_UNSPECIFIED,
4103                                        false, frame_buf);
4104
4105                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4106                                       sizeof(frame_buf));
4107         }
4108
4109         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4110
4111         err = ieee80211_prep_connection(sdata, req->bss, false);
4112         if (err)
4113                 goto err_clear;
4114
4115         err = ieee80211_probe_auth(sdata);
4116         if (err) {
4117                 sta_info_destroy_addr(sdata, req->bss->bssid);
4118                 goto err_clear;
4119         }
4120
4121         /* hold our own reference */
4122         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4123         return 0;
4124
4125  err_clear:
4126         memset(ifmgd->bssid, 0, ETH_ALEN);
4127         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4128         ifmgd->auth_data = NULL;
4129  err_free:
4130         kfree(auth_data);
4131         return err;
4132 }
4133
4134 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4135                         struct cfg80211_assoc_request *req)
4136 {
4137         struct ieee80211_local *local = sdata->local;
4138         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4139         struct ieee80211_bss *bss = (void *)req->bss->priv;
4140         struct ieee80211_mgd_assoc_data *assoc_data;
4141         const struct cfg80211_bss_ies *beacon_ies;
4142         struct ieee80211_supported_band *sband;
4143         const u8 *ssidie, *ht_ie, *vht_ie;
4144         int i, err;
4145
4146         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4147         if (!assoc_data)
4148                 return -ENOMEM;
4149
4150         rcu_read_lock();
4151         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4152         if (!ssidie) {
4153                 rcu_read_unlock();
4154                 kfree(assoc_data);
4155                 return -EINVAL;
4156         }
4157         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4158         assoc_data->ssid_len = ssidie[1];
4159         rcu_read_unlock();
4160
4161         if (ifmgd->associated) {
4162                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4163
4164                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4165                                        WLAN_REASON_UNSPECIFIED,
4166                                        false, frame_buf);
4167
4168                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4169                                       sizeof(frame_buf));
4170         }
4171
4172         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4173                 err = -EBUSY;
4174                 goto err_free;
4175         }
4176
4177         if (ifmgd->assoc_data) {
4178                 err = -EBUSY;
4179                 goto err_free;
4180         }
4181
4182         if (ifmgd->auth_data) {
4183                 bool match;
4184
4185                 /* keep sta info, bssid if matching */
4186                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4187                 ieee80211_destroy_auth_data(sdata, match);
4188         }
4189
4190         /* prepare assoc data */
4191
4192         ifmgd->beacon_crc_valid = false;
4193
4194         /*
4195          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4196          * We still associate in non-HT mode (11a/b/g) if any one of these
4197          * ciphers is configured as pairwise.
4198          * We can set this to true for non-11n hardware, that'll be checked
4199          * separately along with the peer capabilities.
4200          */
4201         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4202                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4203                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4204                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4205                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4206                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4207                         netdev_info(sdata->dev,
4208                                     "disabling HT/VHT due to WEP/TKIP use\n");
4209                 }
4210         }
4211
4212         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4213                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4214                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4215         }
4216
4217         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4218                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4219
4220         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4221         sband = local->hw.wiphy->bands[req->bss->channel->band];
4222         if (!sband->ht_cap.ht_supported ||
4223             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4224                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4225                 if (!bss->wmm_used)
4226                         netdev_info(sdata->dev,
4227                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4228         }
4229
4230         /* disable VHT if we don't support it or the AP doesn't use WMM */
4231         if (!sband->vht_cap.vht_supported ||
4232             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4233                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4234                 if (!bss->wmm_used)
4235                         netdev_info(sdata->dev,
4236                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4237         }
4238
4239         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4240         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4241                sizeof(ifmgd->ht_capa_mask));
4242
4243         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4244         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4245                sizeof(ifmgd->vht_capa_mask));
4246
4247         if (req->ie && req->ie_len) {
4248                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4249                 assoc_data->ie_len = req->ie_len;
4250         }
4251
4252         assoc_data->bss = req->bss;
4253
4254         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4255                 if (ifmgd->powersave)
4256                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4257                 else
4258                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4259         } else
4260                 sdata->smps_mode = ifmgd->req_smps;
4261
4262         assoc_data->capability = req->bss->capability;
4263         assoc_data->wmm = bss->wmm_used &&
4264                           (local->hw.queues >= IEEE80211_NUM_ACS);
4265         assoc_data->supp_rates = bss->supp_rates;
4266         assoc_data->supp_rates_len = bss->supp_rates_len;
4267
4268         rcu_read_lock();
4269         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4270         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4271                 assoc_data->ap_ht_param =
4272                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4273         else
4274                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4275         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4276         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4277                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4278                        sizeof(struct ieee80211_vht_cap));
4279         else
4280                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4281         rcu_read_unlock();
4282
4283         if (bss->wmm_used && bss->uapsd_supported &&
4284             (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4285             sdata->wmm_acm != 0xff) {
4286                 assoc_data->uapsd = true;
4287                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4288         } else {
4289                 assoc_data->uapsd = false;
4290                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4291         }
4292
4293         if (req->prev_bssid)
4294                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4295
4296         if (req->use_mfp) {
4297                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4298                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4299         } else {
4300                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4301                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4302         }
4303
4304         if (req->crypto.control_port)
4305                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4306         else
4307                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4308
4309         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4310         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4311
4312         /* kick off associate process */
4313
4314         ifmgd->assoc_data = assoc_data;
4315         ifmgd->dtim_period = 0;
4316         ifmgd->have_beacon = false;
4317
4318         err = ieee80211_prep_connection(sdata, req->bss, true);
4319         if (err)
4320                 goto err_clear;
4321
4322         rcu_read_lock();
4323         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4324
4325         if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4326             !beacon_ies) {
4327                 /*
4328                  * Wait up to one beacon interval ...
4329                  * should this be more if we miss one?
4330                  */
4331                 sdata_info(sdata, "waiting for beacon from %pM\n",
4332                            ifmgd->bssid);
4333                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4334                 assoc_data->timeout_started = true;
4335                 assoc_data->need_beacon = true;
4336         } else if (beacon_ies) {
4337                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4338                                                     beacon_ies->data,
4339                                                     beacon_ies->len);
4340                 u8 dtim_count = 0;
4341
4342                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4343                         const struct ieee80211_tim_ie *tim;
4344                         tim = (void *)(tim_ie + 2);
4345                         ifmgd->dtim_period = tim->dtim_period;
4346                         dtim_count = tim->dtim_count;
4347                 }
4348                 ifmgd->have_beacon = true;
4349                 assoc_data->timeout = jiffies;
4350                 assoc_data->timeout_started = true;
4351
4352                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4353                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4354                         sdata->vif.bss_conf.sync_device_ts =
4355                                 bss->device_ts_beacon;
4356                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4357                 }
4358         } else {
4359                 assoc_data->timeout = jiffies;
4360                 assoc_data->timeout_started = true;
4361         }
4362         rcu_read_unlock();
4363
4364         run_again(sdata, assoc_data->timeout);
4365
4366         if (bss->corrupt_data) {
4367                 char *corrupt_type = "data";
4368                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4369                         if (bss->corrupt_data &
4370                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4371                                 corrupt_type = "beacon and probe response";
4372                         else
4373                                 corrupt_type = "beacon";
4374                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4375                         corrupt_type = "probe response";
4376                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4377                            corrupt_type);
4378         }
4379
4380         return 0;
4381  err_clear:
4382         memset(ifmgd->bssid, 0, ETH_ALEN);
4383         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4384         ifmgd->assoc_data = NULL;
4385  err_free:
4386         kfree(assoc_data);
4387         return err;
4388 }
4389
4390 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4391                          struct cfg80211_deauth_request *req)
4392 {
4393         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4394         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4395         bool tx = !req->local_state_change;
4396         bool report_frame = false;
4397
4398         sdata_info(sdata,
4399                    "deauthenticating from %pM by local choice (reason=%d)\n",
4400                    req->bssid, req->reason_code);
4401
4402         if (ifmgd->auth_data) {
4403                 drv_mgd_prepare_tx(sdata->local, sdata);
4404                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4405                                                IEEE80211_STYPE_DEAUTH,
4406                                                req->reason_code, tx,
4407                                                frame_buf);
4408                 ieee80211_destroy_auth_data(sdata, false);
4409
4410                 report_frame = true;
4411                 goto out;
4412         }
4413
4414         if (ifmgd->associated &&
4415             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4416                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4417                                        req->reason_code, tx, frame_buf);
4418                 report_frame = true;
4419         }
4420
4421  out:
4422         if (report_frame)
4423                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4424                                       IEEE80211_DEAUTH_FRAME_LEN);
4425
4426         return 0;
4427 }
4428
4429 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4430                            struct cfg80211_disassoc_request *req)
4431 {
4432         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4433         u8 bssid[ETH_ALEN];
4434         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4435
4436         /*
4437          * cfg80211 should catch this ... but it's racy since
4438          * we can receive a disassoc frame, process it, hand it
4439          * to cfg80211 while that's in a locked section already
4440          * trying to tell us that the user wants to disconnect.
4441          */
4442         if (ifmgd->associated != req->bss)
4443                 return -ENOLINK;
4444
4445         sdata_info(sdata,
4446                    "disassociating from %pM by local choice (reason=%d)\n",
4447                    req->bss->bssid, req->reason_code);
4448
4449         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4450         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4451                                req->reason_code, !req->local_state_change,
4452                                frame_buf);
4453
4454         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4455                               IEEE80211_DEAUTH_FRAME_LEN);
4456
4457         return 0;
4458 }
4459
4460 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4461 {
4462         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4463
4464         /*
4465          * Make sure some work items will not run after this,
4466          * they will not do anything but might not have been
4467          * cancelled when disconnecting.
4468          */
4469         cancel_work_sync(&ifmgd->monitor_work);
4470         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4471         cancel_work_sync(&ifmgd->request_smps_work);
4472         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4473         cancel_work_sync(&ifmgd->chswitch_work);
4474
4475         sdata_lock(sdata);
4476         if (ifmgd->assoc_data) {
4477                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4478                 ieee80211_destroy_assoc_data(sdata, false);
4479                 cfg80211_assoc_timeout(sdata->dev, bss);
4480         }
4481         if (ifmgd->auth_data)
4482                 ieee80211_destroy_auth_data(sdata, false);
4483         del_timer_sync(&ifmgd->timer);
4484         sdata_unlock(sdata);
4485 }
4486
4487 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4488                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4489                                gfp_t gfp)
4490 {
4491         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4492
4493         trace_api_cqm_rssi_notify(sdata, rssi_event);
4494
4495         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4496 }
4497 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);