net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/delay.h>
  15 #include <linux/if_ether.h>
  16 #include <linux/skbuff.h>
  17 #include <linux/if_arp.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/moduleparam.h>
  20 #include <linux/rtnetlink.h>
  21 #include <linux/pm_qos.h>
  22 #include <linux/crc32.h>
  23 #include <linux/slab.h>
  24 #include <linux/export.h>
  25 #include <net/mac80211.h>
  26 #include <asm/unaligned.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "led.h"
  32
  33 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  34 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  35 #define IEEE80211_AUTH_MAX_TRIES        3
  36 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  37 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  38 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  39 #define IEEE80211_ASSOC_MAX_TRIES       3
  40
  41 static int max_nullfunc_tries = 2;
  42 module_param(max_nullfunc_tries, int, 0644);
  43 MODULE_PARM_DESC(max_nullfunc_tries,
  44                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  45
  46 static int max_probe_tries = 5;
  47 module_param(max_probe_tries, int, 0644);
  48 MODULE_PARM_DESC(max_probe_tries,
  49                  "Maximum probe tries before disconnecting (reason 4).");
  50
  51 /*
  52  * Beacon loss timeout is calculated as N frames times the
  53  * advertised beacon interval.  This may need to be somewhat
  54  * higher than what hardware might detect to account for
  55  * delays in the host processing frames. But since we also
  56  * probe on beacon miss before declaring the connection lost
  57  * default to what we want.
  58  */
  59 static int beacon_loss_count = 7;
  60 module_param(beacon_loss_count, int, 0644);
  61 MODULE_PARM_DESC(beacon_loss_count,
  62                  "Number of beacon intervals before we decide beacon was lost.");
  63
  64 /*
  65  * Time the connection can be idle before we probe
  66  * it to see if we can still talk to the AP.
  67  */
  68 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  69 /*
  70  * Time we wait for a probe response after sending
  71  * a probe request because of beacon loss or for
  72  * checking the connection still works.
  73  */
  74 static int probe_wait_ms = 500;
  75 module_param(probe_wait_ms, int, 0644);
  76 MODULE_PARM_DESC(probe_wait_ms,
  77                  "Maximum time(ms) to wait for probe response"
  78                  " before disconnecting (reason 4).");
  79
  80 /*
  81  * Weight given to the latest Beacon frame when calculating average signal
  82  * strength for Beacon frames received in the current BSS. This must be
  83  * between 1 and 15.
  84  */
  85 #define IEEE80211_SIGNAL_AVE_WEIGHT     3
  86
  87 /*
  88  * How many Beacon frames need to have been used in average signal strength
  89  * before starting to indicate signal change events.
  90  */
  91 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  92
  93 /*
  94  * We can have multiple work items (and connection probing)
  95  * scheduling this timer, but we need to take care to only
  96  * reschedule it when it should fire _earlier_ than it was
  97  * asked for before, or if it's not pending right now. This
  98  * function ensures that. Note that it then is required to
  99  * run this function for all timeouts after the first one
 100  * has happened -- the work that runs from this timer will
 101  * do that.
 102  */
 103 static void run_again(struct ieee80211_sub_if_data *sdata,
 104                       unsigned long timeout)
 105 {
 106         sdata_assert_lock(sdata);
 107
 108         if (!timer_pending(&sdata->u.mgd.timer) ||
 109             time_before(timeout, sdata->u.mgd.timer.expires))
 110                 mod_timer(&sdata->u.mgd.timer, timeout);
 111 }
 112
 113 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 114 {
 115         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 116                 return;
 117
 118         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 119                 return;
 120
 121         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 122                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 123 }
 124
 125 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 126 {
 127         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 128
 129         if (unlikely(!sdata->u.mgd.associated))
 130                 return;
 131
 132         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 133                 return;
 134
 135         mod_timer(&sdata->u.mgd.conn_mon_timer,
 136                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 137
 138         ifmgd->probe_send_count = 0;
 139 }
 140
 141 static int ecw2cw(int ecw)
 142 {
 143         return (1 << ecw) - 1;
 144 }
 145
 146 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
 147 {
 148         u32 ret;
 149         int tmp;
 150
 151         switch (c->width) {
 152         case NL80211_CHAN_WIDTH_20:
 153                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
 154                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 155                 break;
 156         case NL80211_CHAN_WIDTH_40:
 157                 c->width = NL80211_CHAN_WIDTH_20;
 158                 c->center_freq1 = c->chan->center_freq;
 159                 ret = IEEE80211_STA_DISABLE_40MHZ |
 160                       IEEE80211_STA_DISABLE_VHT;
 161                 break;
 162         case NL80211_CHAN_WIDTH_80:
 163                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
 164                 /* n_P40 */
 165                 tmp /= 2;
 166                 /* freq_P40 */
 167                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
 168                 c->width = NL80211_CHAN_WIDTH_40;
 169                 ret = IEEE80211_STA_DISABLE_VHT;
 170                 break;
 171         case NL80211_CHAN_WIDTH_80P80:
 172                 c->center_freq2 = 0;
 173                 c->width = NL80211_CHAN_WIDTH_80;
 174                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
 175                       IEEE80211_STA_DISABLE_160MHZ;
 176                 break;
 177         case NL80211_CHAN_WIDTH_160:
 178                 /* n_P20 */
 179                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
 180                 /* n_P80 */
 181                 tmp /= 4;
 182                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
 183                 c->width = NL80211_CHAN_WIDTH_80;
 184                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
 185                       IEEE80211_STA_DISABLE_160MHZ;
 186                 break;
 187         default:
 188         case NL80211_CHAN_WIDTH_20_NOHT:
 189                 WARN_ON_ONCE(1);
 190                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
 191                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 192                 break;
 193         case NL80211_CHAN_WIDTH_5:
 194         case NL80211_CHAN_WIDTH_10:
 195                 WARN_ON_ONCE(1);
 196                 /* keep c->width */
 197                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 198                 break;
 199         }
 200
 201         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
 202
 203         return ret;
 204 }
 205
 206 static u32
 207 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 208                              struct ieee80211_supported_band *sband,
 209                              struct ieee80211_channel *channel,
 210                              const struct ieee80211_ht_operation *ht_oper,
 211                              const struct ieee80211_vht_operation *vht_oper,
 212                              struct cfg80211_chan_def *chandef, bool verbose)
 213 {
 214         struct cfg80211_chan_def vht_chandef;
 215         u32 ht_cfreq, ret;
 216
 217         chandef->chan = channel;
 218         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 219         chandef->center_freq1 = channel->center_freq;
 220         chandef->center_freq2 = 0;
 221
 222         if (!ht_oper || !sband->ht_cap.ht_supported) {
 223                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 224                 goto out;
 225         }
 226
 227         chandef->width = NL80211_CHAN_WIDTH_20;
 228
 229         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 230                                                   channel->band);
 231         /* check that channel matches the right operating channel */
 232         if (channel->center_freq != ht_cfreq) {
 233                 /*
 234                  * It's possible that some APs are confused here;
 235                  * Netgear WNDR3700 sometimes reports 4 higher than
 236                  * the actual channel in association responses, but
 237                  * since we look at probe response/beacon data here
 238                  * it should be OK.
 239                  */
 240                 if (verbose)
 241                         sdata_info(sdata,
 242                                    "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 243                                    channel->center_freq, ht_cfreq,
 244                                    ht_oper->primary_chan, channel->band);
 245                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 246                 goto out;
 247         }
 248
 249         /* check 40 MHz support, if we have it */
 250         if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 251                 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 252                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 253                         chandef->width = NL80211_CHAN_WIDTH_40;
 254                         chandef->center_freq1 += 10;
 255                         break;
 256                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 257                         chandef->width = NL80211_CHAN_WIDTH_40;
 258                         chandef->center_freq1 -= 10;
 259                         break;
 260                 }
 261         } else {
 262                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 263                 ret = IEEE80211_STA_DISABLE_VHT;
 264                 /* also mark 40 MHz disabled */
 265                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 266                 goto out;
 267         }
 268
 269         if (!vht_oper || !sband->vht_cap.vht_supported) {
 270                 ret = IEEE80211_STA_DISABLE_VHT;
 271                 goto out;
 272         }
 273
 274         vht_chandef.chan = channel;
 275         vht_chandef.center_freq1 =
 276                 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
 277                                                channel->band);
 278         vht_chandef.center_freq2 = 0;
 279
 280         switch (vht_oper->chan_width) {
 281         case IEEE80211_VHT_CHANWIDTH_USE_HT:
 282                 vht_chandef.width = chandef->width;
 283                 break;
 284         case IEEE80211_VHT_CHANWIDTH_80MHZ:
 285                 vht_chandef.width = NL80211_CHAN_WIDTH_80;
 286                 break;
 287         case IEEE80211_VHT_CHANWIDTH_160MHZ:
 288                 vht_chandef.width = NL80211_CHAN_WIDTH_160;
 289                 break;
 290         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
 291                 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
 292                 vht_chandef.center_freq2 =
 293                         ieee80211_channel_to_frequency(
 294                                 vht_oper->center_freq_seg2_idx,
 295                                 channel->band);
 296                 break;
 297         default:
 298                 if (verbose)
 299                         sdata_info(sdata,
 300                                    "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
 301                                    vht_oper->chan_width);
 302                 ret = IEEE80211_STA_DISABLE_VHT;
 303                 goto out;
 304         }
 305
 306         if (!cfg80211_chandef_valid(&vht_chandef)) {
 307                 if (verbose)
 308                         sdata_info(sdata,
 309                                    "AP VHT information is invalid, disable VHT\n");
 310                 ret = IEEE80211_STA_DISABLE_VHT;
 311                 goto out;
 312         }
 313
 314         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 315                 ret = 0;
 316                 goto out;
 317         }
 318
 319         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 320                 if (verbose)
 321                         sdata_info(sdata,
 322                                    "AP VHT information doesn't match HT, disable VHT\n");
 323                 ret = IEEE80211_STA_DISABLE_VHT;
 324                 goto out;
 325         }
 326
 327         *chandef = vht_chandef;
 328
 329         ret = 0;
 330
 331 out:
 332         /* don't print the message below for VHT mismatch if VHT is disabled */
 333         if (ret & IEEE80211_STA_DISABLE_VHT)
 334                 vht_chandef = *chandef;
 335
 336         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 337                                         IEEE80211_CHAN_DISABLED)) {
 338                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 339                         ret = IEEE80211_STA_DISABLE_HT |
 340                               IEEE80211_STA_DISABLE_VHT;
 341                         goto out;
 342                 }
 343
 344                 ret |= chandef_downgrade(chandef);
 345         }
 346
 347         if (chandef->width != vht_chandef.width && verbose)
 348                 sdata_info(sdata,
 349                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 350
 351         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 352         return ret;
 353 }
 354
 355 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 356                                struct sta_info *sta,
 357                                const struct ieee80211_ht_operation *ht_oper,
 358                                const struct ieee80211_vht_operation *vht_oper,
 359                                const u8 *bssid, u32 *changed)
 360 {
 361         struct ieee80211_local *local = sdata->local;
 362         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 363         struct ieee80211_supported_band *sband;
 364         struct ieee80211_channel *chan;
 365         struct cfg80211_chan_def chandef;
 366         u16 ht_opmode;
 367         u32 flags;
 368         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 369         int ret;
 370
 371         /* if HT was/is disabled, don't track any bandwidth changes */
 372         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 373                 return 0;
 374
 375         /* don't check VHT if we associated as non-VHT station */
 376         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 377                 vht_oper = NULL;
 378
 379         if (WARN_ON_ONCE(!sta))
 380                 return -EINVAL;
 381
 382         chan = sdata->vif.bss_conf.chandef.chan;
 383         sband = local->hw.wiphy->bands[chan->band];
 384
 385         /* calculate new channel (type) based on HT/VHT operation IEs */
 386         flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
 387                                              vht_oper, &chandef, false);
 388
 389         /*
 390          * Downgrade the new channel if we associated with restricted
 391          * capabilities. For example, if we associated as a 20 MHz STA
 392          * to a 40 MHz AP (due to regulatory, capabilities or config
 393          * reasons) then switching to a 40 MHz channel now won't do us
 394          * any good -- we couldn't use it with the AP.
 395          */
 396         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 397             chandef.width == NL80211_CHAN_WIDTH_80P80)
 398                 flags |= chandef_downgrade(&chandef);
 399         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 400             chandef.width == NL80211_CHAN_WIDTH_160)
 401                 flags |= chandef_downgrade(&chandef);
 402         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 403             chandef.width > NL80211_CHAN_WIDTH_20)
 404                 flags |= chandef_downgrade(&chandef);
 405
 406         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 407                 return 0;
 408
 409         sdata_info(sdata,
 410                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 411                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 412                    chandef.center_freq1, chandef.center_freq2);
 413
 414         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 415                                       IEEE80211_STA_DISABLE_VHT |
 416                                       IEEE80211_STA_DISABLE_40MHZ |
 417                                       IEEE80211_STA_DISABLE_80P80MHZ |
 418                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 419             !cfg80211_chandef_valid(&chandef)) {
 420                 sdata_info(sdata,
 421                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 422                            ifmgd->bssid);
 423                 return -EINVAL;
 424         }
 425
 426         switch (chandef.width) {
 427         case NL80211_CHAN_WIDTH_20_NOHT:
 428         case NL80211_CHAN_WIDTH_20:
 429                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 430                 break;
 431         case NL80211_CHAN_WIDTH_40:
 432                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 433                 break;
 434         case NL80211_CHAN_WIDTH_80:
 435                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 436                 break;
 437         case NL80211_CHAN_WIDTH_80P80:
 438         case NL80211_CHAN_WIDTH_160:
 439                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 440                 break;
 441         default:
 442                 return -EINVAL;
 443         }
 444
 445         if (new_sta_bw > sta->cur_max_bandwidth)
 446                 new_sta_bw = sta->cur_max_bandwidth;
 447
 448         if (new_sta_bw < sta->sta.bandwidth) {
 449                 sta->sta.bandwidth = new_sta_bw;
 450                 rate_control_rate_update(local, sband, sta,
 451                                          IEEE80211_RC_BW_CHANGED);
 452         }
 453
 454         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 455         if (ret) {
 456                 sdata_info(sdata,
 457                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 458                            ifmgd->bssid);
 459                 return ret;
 460         }
 461
 462         if (new_sta_bw > sta->sta.bandwidth) {
 463                 sta->sta.bandwidth = new_sta_bw;
 464                 rate_control_rate_update(local, sband, sta,
 465                                          IEEE80211_RC_BW_CHANGED);
 466         }
 467
 468         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 469
 470         /* if bss configuration changed store the new one */
 471         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 472                 *changed |= BSS_CHANGED_HT;
 473                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 474         }
 475
 476         return 0;
 477 }
 478
 479 /* frame sending functions */
 480
 481 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 482                                 struct sk_buff *skb, u8 ap_ht_param,
 483                                 struct ieee80211_supported_band *sband,
 484                                 struct ieee80211_channel *channel,
 485                                 enum ieee80211_smps_mode smps)
 486 {
 487         u8 *pos;
 488         u32 flags = channel->flags;
 489         u16 cap;
 490         struct ieee80211_sta_ht_cap ht_cap;
 491
 492         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 493
 494         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 495         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 496
 497         /* determine capability flags */
 498         cap = ht_cap.cap;
 499
 500         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 501         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 502                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 503                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 504                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 505                 }
 506                 break;
 507         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 508                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 509                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 510                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 511                 }
 512                 break;
 513         }
 514
 515         /*
 516          * If 40 MHz was disabled associate as though we weren't
 517          * capable of 40 MHz -- some broken APs will never fall
 518          * back to trying to transmit in 20 MHz.
 519          */
 520         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 521                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 522                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 523         }
 524
 525         /* set SM PS mode properly */
 526         cap &= ~IEEE80211_HT_CAP_SM_PS;
 527         switch (smps) {
 528         case IEEE80211_SMPS_AUTOMATIC:
 529         case IEEE80211_SMPS_NUM_MODES:
 530                 WARN_ON(1);
 531         case IEEE80211_SMPS_OFF:
 532                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 533                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 534                 break;
 535         case IEEE80211_SMPS_STATIC:
 536                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 537                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 538                 break;
 539         case IEEE80211_SMPS_DYNAMIC:
 540                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 541                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 542                 break;
 543         }
 544
 545         /* reserve and fill IE */
 546         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 547         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 548 }
 549
 550 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 551                                  struct sk_buff *skb,
 552                                  struct ieee80211_supported_band *sband,
 553                                  struct ieee80211_vht_cap *ap_vht_cap)
 554 {
 555         u8 *pos;
 556         u32 cap;
 557         struct ieee80211_sta_vht_cap vht_cap;
 558
 559         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 560
 561         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 562         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 563
 564         /* determine capability flags */
 565         cap = vht_cap.cap;
 566
 567         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 568                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
 569                 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 570         }
 571
 572         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 573                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 574                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 575         }
 576
 577         /*
 578          * Some APs apparently get confused if our capabilities are better
 579          * than theirs, so restrict what we advertise in the assoc request.
 580          */
 581         if (!(ap_vht_cap->vht_cap_info &
 582                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 583                 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
 584
 585         /* reserve and fill IE */
 586         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 587         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 588 }
 589
 590 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 591 {
 592         struct ieee80211_local *local = sdata->local;
 593         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 594         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 595         struct sk_buff *skb;
 596         struct ieee80211_mgmt *mgmt;
 597         u8 *pos, qos_info;
 598         size_t offset = 0, noffset;
 599         int i, count, rates_len, supp_rates_len, shift;
 600         u16 capab;
 601         struct ieee80211_supported_band *sband;
 602         struct ieee80211_chanctx_conf *chanctx_conf;
 603         struct ieee80211_channel *chan;
 604         u32 rate_flags, rates = 0;
 605
 606         sdata_assert_lock(sdata);
 607
 608         rcu_read_lock();
 609         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 610         if (WARN_ON(!chanctx_conf)) {
 611                 rcu_read_unlock();
 612                 return;
 613         }
 614         chan = chanctx_conf->def.chan;
 615         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 616         rcu_read_unlock();
 617         sband = local->hw.wiphy->bands[chan->band];
 618         shift = ieee80211_vif_get_shift(&sdata->vif);
 619
 620         if (assoc_data->supp_rates_len) {
 621                 /*
 622                  * Get all rates supported by the device and the AP as
 623                  * some APs don't like getting a superset of their rates
 624                  * in the association request (e.g. D-Link DAP 1353 in
 625                  * b-only mode)...
 626                  */
 627                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 628                                                      assoc_data->supp_rates,
 629                                                      assoc_data->supp_rates_len,
 630                                                      &rates);
 631         } else {
 632                 /*
 633                  * In case AP not provide any supported rates information
 634                  * before association, we send information element(s) with
 635                  * all rates that we support.
 636                  */
 637                 rates_len = 0;
 638                 for (i = 0; i < sband->n_bitrates; i++) {
 639                         if ((rate_flags & sband->bitrates[i].flags)
 640                             != rate_flags)
 641                                 continue;
 642                         rates |= BIT(i);
 643                         rates_len++;
 644                 }
 645         }
 646
 647         skb = alloc_skb(local->hw.extra_tx_headroom +
 648                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 649                         2 + assoc_data->ssid_len + /* SSID */
 650                         4 + rates_len + /* (extended) rates */
 651                         4 + /* power capability */
 652                         2 + 2 * sband->n_channels + /* supported channels */
 653                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 654                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 655                         assoc_data->ie_len + /* extra IEs */
 656                         9, /* WMM */
 657                         GFP_KERNEL);
 658         if (!skb)
 659                 return;
 660
 661         skb_reserve(skb, local->hw.extra_tx_headroom);
 662
 663         capab = WLAN_CAPABILITY_ESS;
 664
 665         if (sband->band == IEEE80211_BAND_2GHZ) {
 666                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 667                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 668                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 669                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 670         }
 671
 672         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 673                 capab |= WLAN_CAPABILITY_PRIVACY;
 674
 675         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 676             (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 677                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 678
 679         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 680         memset(mgmt, 0, 24);
 681         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 682         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 683         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 684
 685         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 686                 skb_put(skb, 10);
 687                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 688                                                   IEEE80211_STYPE_REASSOC_REQ);
 689                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 690                 mgmt->u.reassoc_req.listen_interval =
 691                                 cpu_to_le16(local->hw.conf.listen_interval);
 692                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 693                        ETH_ALEN);
 694         } else {
 695                 skb_put(skb, 4);
 696                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 697                                                   IEEE80211_STYPE_ASSOC_REQ);
 698                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 699                 mgmt->u.assoc_req.listen_interval =
 700                                 cpu_to_le16(local->hw.conf.listen_interval);
 701         }
 702
 703         /* SSID */
 704         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 705         *pos++ = WLAN_EID_SSID;
 706         *pos++ = assoc_data->ssid_len;
 707         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 708
 709         /* add all rates which were marked to be used above */
 710         supp_rates_len = rates_len;
 711         if (supp_rates_len > 8)
 712                 supp_rates_len = 8;
 713
 714         pos = skb_put(skb, supp_rates_len + 2);
 715         *pos++ = WLAN_EID_SUPP_RATES;
 716         *pos++ = supp_rates_len;
 717
 718         count = 0;
 719         for (i = 0; i < sband->n_bitrates; i++) {
 720                 if (BIT(i) & rates) {
 721                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 722                                                 5 * (1 << shift));
 723                         *pos++ = (u8) rate;
 724                         if (++count == 8)
 725                                 break;
 726                 }
 727         }
 728
 729         if (rates_len > count) {
 730                 pos = skb_put(skb, rates_len - count + 2);
 731                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 732                 *pos++ = rates_len - count;
 733
 734                 for (i++; i < sband->n_bitrates; i++) {
 735                         if (BIT(i) & rates) {
 736                                 int rate;
 737                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 738                                                     5 * (1 << shift));
 739                                 *pos++ = (u8) rate;
 740                         }
 741                 }
 742         }
 743
 744         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 745                 /* 1. power capabilities */
 746                 pos = skb_put(skb, 4);
 747                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 748                 *pos++ = 2;
 749                 *pos++ = 0; /* min tx power */
 750                  /* max tx power */
 751                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 752
 753                 /* 2. supported channels */
 754                 /* TODO: get this in reg domain format */
 755                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 756                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 757                 *pos++ = 2 * sband->n_channels;
 758                 for (i = 0; i < sband->n_channels; i++) {
 759                         *pos++ = ieee80211_frequency_to_channel(
 760                                         sband->channels[i].center_freq);
 761                         *pos++ = 1; /* one channel in the subband*/
 762                 }
 763         }
 764
 765         /* if present, add any custom IEs that go before HT */
 766         if (assoc_data->ie_len && assoc_data->ie) {
 767                 static const u8 before_ht[] = {
 768                         WLAN_EID_SSID,
 769                         WLAN_EID_SUPP_RATES,
 770                         WLAN_EID_EXT_SUPP_RATES,
 771                         WLAN_EID_PWR_CAPABILITY,
 772                         WLAN_EID_SUPPORTED_CHANNELS,
 773                         WLAN_EID_RSN,
 774                         WLAN_EID_QOS_CAPA,
 775                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 776                         WLAN_EID_MOBILITY_DOMAIN,
 777                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 778                 };
 779                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 780                                              before_ht, ARRAY_SIZE(before_ht),
 781                                              offset);
 782                 pos = skb_put(skb, noffset - offset);
 783                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 784                 offset = noffset;
 785         }
 786
 787         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 788                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 789                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 790
 791         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 792                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 793                                     sband, chan, sdata->smps_mode);
 794
 795         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 796                 ieee80211_add_vht_ie(sdata, skb, sband,
 797                                      &assoc_data->ap_vht_cap);
 798
 799         /* if present, add any custom non-vendor IEs that go after HT */
 800         if (assoc_data->ie_len && assoc_data->ie) {
 801                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 802                                                     assoc_data->ie_len,
 803                                                     offset);
 804                 pos = skb_put(skb, noffset - offset);
 805                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 806                 offset = noffset;
 807         }
 808
 809         if (assoc_data->wmm) {
 810                 if (assoc_data->uapsd) {
 811                         qos_info = ifmgd->uapsd_queues;
 812                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 813                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 814                 } else {
 815                         qos_info = 0;
 816                 }
 817
 818                 pos = skb_put(skb, 9);
 819                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 820                 *pos++ = 7; /* len */
 821                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 822                 *pos++ = 0x50;
 823                 *pos++ = 0xf2;
 824                 *pos++ = 2; /* WME */
 825                 *pos++ = 0; /* WME info */
 826                 *pos++ = 1; /* WME ver */
 827                 *pos++ = qos_info;
 828         }
 829
 830         /* add any remaining custom (i.e. vendor specific here) IEs */
 831         if (assoc_data->ie_len && assoc_data->ie) {
 832                 noffset = assoc_data->ie_len;
 833                 pos = skb_put(skb, noffset - offset);
 834                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 835         }
 836
 837         drv_mgd_prepare_tx(local, sdata);
 838
 839         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 840         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 841                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 842                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 843         ieee80211_tx_skb(sdata, skb);
 844 }
 845
 846 void ieee80211_send_pspoll(struct ieee80211_local *local,
 847                            struct ieee80211_sub_if_data *sdata)
 848 {
 849         struct ieee80211_pspoll *pspoll;
 850         struct sk_buff *skb;
 851
 852         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 853         if (!skb)
 854                 return;
 855
 856         pspoll = (struct ieee80211_pspoll *) skb->data;
 857         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 858
 859         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 860         ieee80211_tx_skb(sdata, skb);
 861 }
 862
 863 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 864                              struct ieee80211_sub_if_data *sdata,
 865                              int powersave)
 866 {
 867         struct sk_buff *skb;
 868         struct ieee80211_hdr_3addr *nullfunc;
 869         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 870
 871         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 872         if (!skb)
 873                 return;
 874
 875         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 876         if (powersave)
 877                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 878
 879         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 880                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 881
 882         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 883                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 884
 885         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
 886                             IEEE80211_STA_CONNECTION_POLL))
 887                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 888
 889         ieee80211_tx_skb(sdata, skb);
 890 }
 891
 892 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 893                                           struct ieee80211_sub_if_data *sdata)
 894 {
 895         struct sk_buff *skb;
 896         struct ieee80211_hdr *nullfunc;
 897         __le16 fc;
 898
 899         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 900                 return;
 901
 902         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 903         if (!skb)
 904                 return;
 905
 906         skb_reserve(skb, local->hw.extra_tx_headroom);
 907
 908         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 909         memset(nullfunc, 0, 30);
 910         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 911                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 912         nullfunc->frame_control = fc;
 913         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 914         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 915         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 916         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 917
 918         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 919         ieee80211_tx_skb(sdata, skb);
 920 }
 921
 922 /* spectrum management related things */
 923 static void ieee80211_chswitch_work(struct work_struct *work)
 924 {
 925         struct ieee80211_sub_if_data *sdata =
 926                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 927         struct ieee80211_local *local = sdata->local;
 928         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 929
 930         if (!ieee80211_sdata_running(sdata))
 931                 return;
 932
 933         sdata_lock(sdata);
 934         if (!ifmgd->associated)
 935                 goto out;
 936
 937         local->_oper_chandef = local->csa_chandef;
 938
 939         if (!local->ops->channel_switch) {
 940                 /* call "hw_config" only if doing sw channel switch */
 941                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
 942         } else {
 943                 /* update the device channel directly */
 944                 local->hw.conf.chandef = local->_oper_chandef;
 945         }
 946
 947         /* XXX: shouldn't really modify cfg80211-owned data! */
 948         ifmgd->associated->channel = local->_oper_chandef.chan;
 949
 950         /* XXX: wait for a beacon first? */
 951         ieee80211_wake_queues_by_reason(&local->hw,
 952                                         IEEE80211_MAX_QUEUE_MAP,
 953                                         IEEE80211_QUEUE_STOP_REASON_CSA);
 954  out:
 955         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
 956         sdata_unlock(sdata);
 957 }
 958
 959 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
 960 {
 961         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 962         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 963
 964         trace_api_chswitch_done(sdata, success);
 965         if (!success) {
 966                 sdata_info(sdata,
 967                            "driver channel switch failed, disconnecting\n");
 968                 ieee80211_queue_work(&sdata->local->hw,
 969                                      &ifmgd->csa_connection_drop_work);
 970         } else {
 971                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
 972         }
 973 }
 974 EXPORT_SYMBOL(ieee80211_chswitch_done);
 975
 976 static void ieee80211_chswitch_timer(unsigned long data)
 977 {
 978         struct ieee80211_sub_if_data *sdata =
 979                 (struct ieee80211_sub_if_data *) data;
 980
 981         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
 982 }
 983
 984 static void
 985 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 986                                  u64 timestamp, struct ieee802_11_elems *elems,
 987                                  bool beacon)
 988 {
 989         struct ieee80211_local *local = sdata->local;
 990         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 991         struct cfg80211_bss *cbss = ifmgd->associated;
 992         struct ieee80211_bss *bss;
 993         struct ieee80211_chanctx *chanctx;
 994         enum ieee80211_band new_band;
 995         int new_freq;
 996         u8 new_chan_no;
 997         u8 count;
 998         u8 mode;
 999         struct ieee80211_channel *new_chan;
1000         struct cfg80211_chan_def new_chandef = {};
1001         struct cfg80211_chan_def new_vht_chandef = {};
1002         const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1003         const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1004         const struct ieee80211_ht_operation *ht_oper;
1005         int secondary_channel_offset = -1;
1006
1007         sdata_assert_lock(sdata);
1008
1009         if (!cbss)
1010                 return;
1011
1012         if (local->scanning)
1013                 return;
1014
1015         /* disregard subsequent announcements if we are already processing */
1016         if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1017                 return;
1018
1019         sec_chan_offs = elems->sec_chan_offs;
1020         wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
1021         ht_oper = elems->ht_operation;
1022
1023         if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1024                             IEEE80211_STA_DISABLE_40MHZ)) {
1025                 sec_chan_offs = NULL;
1026                 wide_bw_chansw_ie = NULL;
1027                 /* only used for bandwidth here */
1028                 ht_oper = NULL;
1029         }
1030
1031         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1032                 wide_bw_chansw_ie = NULL;
1033
1034         if (elems->ext_chansw_ie) {
1035                 if (!ieee80211_operating_class_to_band(
1036                                 elems->ext_chansw_ie->new_operating_class,
1037                                 &new_band)) {
1038                         sdata_info(sdata,
1039                                    "cannot understand ECSA IE operating class %d, disconnecting\n",
1040                                    elems->ext_chansw_ie->new_operating_class);
1041                         ieee80211_queue_work(&local->hw,
1042                                              &ifmgd->csa_connection_drop_work);
1043                 }
1044                 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1045                 count = elems->ext_chansw_ie->count;
1046                 mode = elems->ext_chansw_ie->mode;
1047         } else if (elems->ch_switch_ie) {
1048                 new_band = cbss->channel->band;
1049                 new_chan_no = elems->ch_switch_ie->new_ch_num;
1050                 count = elems->ch_switch_ie->count;
1051                 mode = elems->ch_switch_ie->mode;
1052         } else {
1053                 /* nothing here we understand */
1054                 return;
1055         }
1056
1057         bss = (void *)cbss->priv;
1058
1059         new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
1060         new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1061         if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
1062                 sdata_info(sdata,
1063                            "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1064                            ifmgd->associated->bssid, new_freq);
1065                 ieee80211_queue_work(&local->hw,
1066                                      &ifmgd->csa_connection_drop_work);
1067                 return;
1068         }
1069
1070         if (!beacon && sec_chan_offs) {
1071                 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
1072         } else if (beacon && ht_oper) {
1073                 secondary_channel_offset =
1074                         ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
1075         } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
1076                 /*
1077                  * If it's not a beacon, HT is enabled and the IE not present,
1078                  * it's 20 MHz, 802.11-2012 8.5.2.6:
1079                  *      This element [the Secondary Channel Offset Element] is
1080                  *      present when switching to a 40 MHz channel. It may be
1081                  *      present when switching to a 20 MHz channel (in which
1082                  *      case the secondary channel offset is set to SCN).
1083                  */
1084                 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1085         }
1086
1087         switch (secondary_channel_offset) {
1088         default:
1089                 /* secondary_channel_offset was present but is invalid */
1090         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1091                 cfg80211_chandef_create(&new_chandef, new_chan,
1092                                         NL80211_CHAN_HT20);
1093                 break;
1094         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1095                 cfg80211_chandef_create(&new_chandef, new_chan,
1096                                         NL80211_CHAN_HT40PLUS);
1097                 break;
1098         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1099                 cfg80211_chandef_create(&new_chandef, new_chan,
1100                                         NL80211_CHAN_HT40MINUS);
1101                 break;
1102         case -1:
1103                 cfg80211_chandef_create(&new_chandef, new_chan,
1104                                         NL80211_CHAN_NO_HT);
1105                 break;
1106         }
1107
1108         if (wide_bw_chansw_ie) {
1109                 new_vht_chandef.chan = new_chan;
1110                 new_vht_chandef.center_freq1 =
1111                         ieee80211_channel_to_frequency(
1112                                 wide_bw_chansw_ie->new_center_freq_seg0,
1113                                 new_band);
1114
1115                 switch (wide_bw_chansw_ie->new_channel_width) {
1116                 default:
1117                         /* hmmm, ignore VHT and use HT if present */
1118                 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1119                         new_vht_chandef.chan = NULL;
1120                         break;
1121                 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1122                         new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1123                         break;
1124                 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1125                         new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1126                         break;
1127                 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1128                         /* field is otherwise reserved */
1129                         new_vht_chandef.center_freq2 =
1130                                 ieee80211_channel_to_frequency(
1131                                         wide_bw_chansw_ie->new_center_freq_seg1,
1132                                         new_band);
1133                         new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1134                         break;
1135                 }
1136                 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1137                     new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1138                         chandef_downgrade(&new_vht_chandef);
1139                 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1140                     new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1141                         chandef_downgrade(&new_vht_chandef);
1142                 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1143                     new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1144                         chandef_downgrade(&new_vht_chandef);
1145         }
1146
1147         /* if VHT data is there validate & use it */
1148         if (new_vht_chandef.chan) {
1149                 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1150                                                  &new_chandef)) {
1151                         sdata_info(sdata,
1152                                    "AP %pM CSA has inconsistent channel data, disconnecting\n",
1153                                    ifmgd->associated->bssid);
1154                         ieee80211_queue_work(&local->hw,
1155                                              &ifmgd->csa_connection_drop_work);
1156                         return;
1157                 }
1158                 new_chandef = new_vht_chandef;
1159         }
1160
1161         if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1162                                      IEEE80211_CHAN_DISABLED)) {
1163                 sdata_info(sdata,
1164                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1165                            ifmgd->associated->bssid, new_freq,
1166                            new_chandef.width, new_chandef.center_freq1,
1167                            new_chandef.center_freq2);
1168                 ieee80211_queue_work(&local->hw,
1169                                      &ifmgd->csa_connection_drop_work);
1170                 return;
1171         }
1172
1173         ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1174
1175         if (local->use_chanctx) {
1176                 sdata_info(sdata,
1177                            "not handling channel switch with channel contexts\n");
1178                 ieee80211_queue_work(&local->hw,
1179                                      &ifmgd->csa_connection_drop_work);
1180                 return;
1181         }
1182
1183         mutex_lock(&local->chanctx_mtx);
1184         if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1185                 mutex_unlock(&local->chanctx_mtx);
1186                 return;
1187         }
1188         chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1189                                struct ieee80211_chanctx, conf);
1190         if (chanctx->refcount > 1) {
1191                 sdata_info(sdata,
1192                            "channel switch with multiple interfaces on the same channel, disconnecting\n");
1193                 ieee80211_queue_work(&local->hw,
1194                                      &ifmgd->csa_connection_drop_work);
1195                 mutex_unlock(&local->chanctx_mtx);
1196                 return;
1197         }
1198         mutex_unlock(&local->chanctx_mtx);
1199
1200         local->csa_chandef = new_chandef;
1201
1202         if (mode)
1203                 ieee80211_stop_queues_by_reason(&local->hw,
1204                                 IEEE80211_MAX_QUEUE_MAP,
1205                                 IEEE80211_QUEUE_STOP_REASON_CSA);
1206
1207         if (local->ops->channel_switch) {
1208                 /* use driver's channel switch callback */
1209                 struct ieee80211_channel_switch ch_switch = {
1210                         .timestamp = timestamp,
1211                         .block_tx = mode,
1212                         .chandef = new_chandef,
1213                         .count = count,
1214                 };
1215
1216                 drv_channel_switch(local, &ch_switch);
1217                 return;
1218         }
1219
1220         /* channel switch handled in software */
1221         if (count <= 1)
1222                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1223         else
1224                 mod_timer(&ifmgd->chswitch_timer,
1225                           TU_TO_EXP_TIME(count * cbss->beacon_interval));
1226 }
1227
1228 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1229                                        struct ieee80211_channel *channel,
1230                                        const u8 *country_ie, u8 country_ie_len,
1231                                        const u8 *pwr_constr_elem)
1232 {
1233         struct ieee80211_country_ie_triplet *triplet;
1234         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1235         int i, chan_pwr, chan_increment, new_ap_level;
1236         bool have_chan_pwr = false;
1237
1238         /* Invalid IE */
1239         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1240                 return 0;
1241
1242         triplet = (void *)(country_ie + 3);
1243         country_ie_len -= 3;
1244
1245         switch (channel->band) {
1246         default:
1247                 WARN_ON_ONCE(1);
1248                 /* fall through */
1249         case IEEE80211_BAND_2GHZ:
1250         case IEEE80211_BAND_60GHZ:
1251                 chan_increment = 1;
1252                 break;
1253         case IEEE80211_BAND_5GHZ:
1254                 chan_increment = 4;
1255                 break;
1256         }
1257
1258         /* find channel */
1259         while (country_ie_len >= 3) {
1260                 u8 first_channel = triplet->chans.first_channel;
1261
1262                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1263                         goto next;
1264
1265                 for (i = 0; i < triplet->chans.num_channels; i++) {
1266                         if (first_channel + i * chan_increment == chan) {
1267                                 have_chan_pwr = true;
1268                                 chan_pwr = triplet->chans.max_power;
1269                                 break;
1270                         }
1271                 }
1272                 if (have_chan_pwr)
1273                         break;
1274
1275  next:
1276                 triplet++;
1277                 country_ie_len -= 3;
1278         }
1279
1280         if (!have_chan_pwr)
1281                 return 0;
1282
1283         new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1284
1285         if (sdata->ap_power_level == new_ap_level)
1286                 return 0;
1287
1288         sdata_info(sdata,
1289                    "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1290                    new_ap_level, chan_pwr, *pwr_constr_elem,
1291                    sdata->u.mgd.bssid);
1292         sdata->ap_power_level = new_ap_level;
1293         if (__ieee80211_recalc_txpower(sdata))
1294                 return BSS_CHANGED_TXPOWER;
1295         return 0;
1296 }
1297
1298 /* powersave */
1299 static void ieee80211_enable_ps(struct ieee80211_local *local,
1300                                 struct ieee80211_sub_if_data *sdata)
1301 {
1302         struct ieee80211_conf *conf = &local->hw.conf;
1303
1304         /*
1305          * If we are scanning right now then the parameters will
1306          * take effect when scan finishes.
1307          */
1308         if (local->scanning)
1309                 return;
1310
1311         if (conf->dynamic_ps_timeout > 0 &&
1312             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1313                 mod_timer(&local->dynamic_ps_timer, jiffies +
1314                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1315         } else {
1316                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1317                         ieee80211_send_nullfunc(local, sdata, 1);
1318
1319                 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1320                     (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1321                         return;
1322
1323                 conf->flags |= IEEE80211_CONF_PS;
1324                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1325         }
1326 }
1327
1328 static void ieee80211_change_ps(struct ieee80211_local *local)
1329 {
1330         struct ieee80211_conf *conf = &local->hw.conf;
1331
1332         if (local->ps_sdata) {
1333                 ieee80211_enable_ps(local, local->ps_sdata);
1334         } else if (conf->flags & IEEE80211_CONF_PS) {
1335                 conf->flags &= ~IEEE80211_CONF_PS;
1336                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1337                 del_timer_sync(&local->dynamic_ps_timer);
1338                 cancel_work_sync(&local->dynamic_ps_enable_work);
1339         }
1340 }
1341
1342 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1343 {
1344         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1345         struct sta_info *sta = NULL;
1346         bool authorized = false;
1347
1348         if (!mgd->powersave)
1349                 return false;
1350
1351         if (mgd->broken_ap)
1352                 return false;
1353
1354         if (!mgd->associated)
1355                 return false;
1356
1357         if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1358                           IEEE80211_STA_CONNECTION_POLL))
1359                 return false;
1360
1361         if (!mgd->have_beacon)
1362                 return false;
1363
1364         rcu_read_lock();
1365         sta = sta_info_get(sdata, mgd->bssid);
1366         if (sta)
1367                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1368         rcu_read_unlock();
1369
1370         return authorized;
1371 }
1372
1373 /* need to hold RTNL or interface lock */
1374 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1375 {
1376         struct ieee80211_sub_if_data *sdata, *found = NULL;
1377         int count = 0;
1378         int timeout;
1379
1380         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1381                 local->ps_sdata = NULL;
1382                 return;
1383         }
1384
1385         list_for_each_entry(sdata, &local->interfaces, list) {
1386                 if (!ieee80211_sdata_running(sdata))
1387                         continue;
1388                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1389                         /* If an AP vif is found, then disable PS
1390                          * by setting the count to zero thereby setting
1391                          * ps_sdata to NULL.
1392                          */
1393                         count = 0;
1394                         break;
1395                 }
1396                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1397                         continue;
1398                 found = sdata;
1399                 count++;
1400         }
1401
1402         if (count == 1 && ieee80211_powersave_allowed(found)) {
1403                 s32 beaconint_us;
1404
1405                 if (latency < 0)
1406                         latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1407
1408                 beaconint_us = ieee80211_tu_to_usec(
1409                                         found->vif.bss_conf.beacon_int);
1410
1411                 timeout = local->dynamic_ps_forced_timeout;
1412                 if (timeout < 0) {
1413                         /*
1414                          * Go to full PSM if the user configures a very low
1415                          * latency requirement.
1416                          * The 2000 second value is there for compatibility
1417                          * until the PM_QOS_NETWORK_LATENCY is configured
1418                          * with real values.
1419                          */
1420                         if (latency > (1900 * USEC_PER_MSEC) &&
1421                             latency != (2000 * USEC_PER_SEC))
1422                                 timeout = 0;
1423                         else
1424                                 timeout = 100;
1425                 }
1426                 local->hw.conf.dynamic_ps_timeout = timeout;
1427
1428                 if (beaconint_us > latency) {
1429                         local->ps_sdata = NULL;
1430                 } else {
1431                         int maxslp = 1;
1432                         u8 dtimper = found->u.mgd.dtim_period;
1433
1434                         /* If the TIM IE is invalid, pretend the value is 1 */
1435                         if (!dtimper)
1436                                 dtimper = 1;
1437                         else if (dtimper > 1)
1438                                 maxslp = min_t(int, dtimper,
1439                                                     latency / beaconint_us);
1440
1441                         local->hw.conf.max_sleep_period = maxslp;
1442                         local->hw.conf.ps_dtim_period = dtimper;
1443                         local->ps_sdata = found;
1444                 }
1445         } else {
1446                 local->ps_sdata = NULL;
1447         }
1448
1449         ieee80211_change_ps(local);
1450 }
1451
1452 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1453 {
1454         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1455
1456         if (sdata->vif.bss_conf.ps != ps_allowed) {
1457                 sdata->vif.bss_conf.ps = ps_allowed;
1458                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1459         }
1460 }
1461
1462 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1463 {
1464         struct ieee80211_local *local =
1465                 container_of(work, struct ieee80211_local,
1466                              dynamic_ps_disable_work);
1467
1468         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1469                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1470                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1471         }
1472
1473         ieee80211_wake_queues_by_reason(&local->hw,
1474                                         IEEE80211_MAX_QUEUE_MAP,
1475                                         IEEE80211_QUEUE_STOP_REASON_PS);
1476 }
1477
1478 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1479 {
1480         struct ieee80211_local *local =
1481                 container_of(work, struct ieee80211_local,
1482                              dynamic_ps_enable_work);
1483         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1484         struct ieee80211_if_managed *ifmgd;
1485         unsigned long flags;
1486         int q;
1487
1488         /* can only happen when PS was just disabled anyway */
1489         if (!sdata)
1490                 return;
1491
1492         ifmgd = &sdata->u.mgd;
1493
1494         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1495                 return;
1496
1497         if (local->hw.conf.dynamic_ps_timeout > 0) {
1498                 /* don't enter PS if TX frames are pending */
1499                 if (drv_tx_frames_pending(local)) {
1500                         mod_timer(&local->dynamic_ps_timer, jiffies +
1501                                   msecs_to_jiffies(
1502                                   local->hw.conf.dynamic_ps_timeout));
1503                         return;
1504                 }
1505
1506                 /*
1507                  * transmission can be stopped by others which leads to
1508                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1509                  * is not the actual idle state.
1510                  */
1511                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1512                 for (q = 0; q < local->hw.queues; q++) {
1513                         if (local->queue_stop_reasons[q]) {
1514                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1515                                                        flags);
1516                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1517                                           msecs_to_jiffies(
1518                                           local->hw.conf.dynamic_ps_timeout));
1519                                 return;
1520                         }
1521                 }
1522                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1523         }
1524
1525         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1526             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1527                 if (drv_tx_frames_pending(local)) {
1528                         mod_timer(&local->dynamic_ps_timer, jiffies +
1529                                   msecs_to_jiffies(
1530                                   local->hw.conf.dynamic_ps_timeout));
1531                 } else {
1532                         ieee80211_send_nullfunc(local, sdata, 1);
1533                         /* Flush to get the tx status of nullfunc frame */
1534                         ieee80211_flush_queues(local, sdata);
1535                 }
1536         }
1537
1538         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1539               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1540             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1541                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1542                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1543                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1544         }
1545 }
1546
1547 void ieee80211_dynamic_ps_timer(unsigned long data)
1548 {
1549         struct ieee80211_local *local = (void *) data;
1550
1551         if (local->quiescing || local->suspended)
1552                 return;
1553
1554         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1555 }
1556
1557 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1558 {
1559         struct delayed_work *delayed_work =
1560                 container_of(work, struct delayed_work, work);
1561         struct ieee80211_sub_if_data *sdata =
1562                 container_of(delayed_work, struct ieee80211_sub_if_data,
1563                              dfs_cac_timer_work);
1564
1565         ieee80211_vif_release_channel(sdata);
1566
1567         cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1568 }
1569
1570 /* MLME */
1571 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1572                                      struct ieee80211_sub_if_data *sdata,
1573                                      const u8 *wmm_param, size_t wmm_param_len)
1574 {
1575         struct ieee80211_tx_queue_params params;
1576         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1577         size_t left;
1578         int count;
1579         const u8 *pos;
1580         u8 uapsd_queues = 0;
1581
1582         if (!local->ops->conf_tx)
1583                 return false;
1584
1585         if (local->hw.queues < IEEE80211_NUM_ACS)
1586                 return false;
1587
1588         if (!wmm_param)
1589                 return false;
1590
1591         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1592                 return false;
1593
1594         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1595                 uapsd_queues = ifmgd->uapsd_queues;
1596
1597         count = wmm_param[6] & 0x0f;
1598         if (count == ifmgd->wmm_last_param_set)
1599                 return false;
1600         ifmgd->wmm_last_param_set = count;
1601
1602         pos = wmm_param + 8;
1603         left = wmm_param_len - 8;
1604
1605         memset(&params, 0, sizeof(params));
1606
1607         sdata->wmm_acm = 0;
1608         for (; left >= 4; left -= 4, pos += 4) {
1609                 int aci = (pos[0] >> 5) & 0x03;
1610                 int acm = (pos[0] >> 4) & 0x01;
1611                 bool uapsd = false;
1612                 int queue;
1613
1614                 switch (aci) {
1615                 case 1: /* AC_BK */
1616                         queue = 3;
1617                         if (acm)
1618                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1619                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1620                                 uapsd = true;
1621                         break;
1622                 case 2: /* AC_VI */
1623                         queue = 1;
1624                         if (acm)
1625                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1626                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1627                                 uapsd = true;
1628                         break;
1629                 case 3: /* AC_VO */
1630                         queue = 0;
1631                         if (acm)
1632                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1633                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1634                                 uapsd = true;
1635                         break;
1636                 case 0: /* AC_BE */
1637                 default:
1638                         queue = 2;
1639                         if (acm)
1640                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1641                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1642                                 uapsd = true;
1643                         break;
1644                 }
1645
1646                 params.aifs = pos[0] & 0x0f;
1647                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1648                 params.cw_min = ecw2cw(pos[1] & 0x0f);
1649                 params.txop = get_unaligned_le16(pos + 2);
1650                 params.acm = acm;
1651                 params.uapsd = uapsd;
1652
1653                 mlme_dbg(sdata,
1654                          "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1655                          queue, aci, acm,
1656                          params.aifs, params.cw_min, params.cw_max,
1657                          params.txop, params.uapsd);
1658                 sdata->tx_conf[queue] = params;
1659                 if (drv_conf_tx(local, sdata, queue, &params))
1660                         sdata_err(sdata,
1661                                   "failed to set TX queue parameters for queue %d\n",
1662                                   queue);
1663         }
1664
1665         /* enable WMM or activate new settings */
1666         sdata->vif.bss_conf.qos = true;
1667         return true;
1668 }
1669
1670 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1671 {
1672         lockdep_assert_held(&sdata->local->mtx);
1673
1674         sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1675                                 IEEE80211_STA_BEACON_POLL);
1676         ieee80211_run_deferred_scan(sdata->local);
1677 }
1678
1679 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1680 {
1681         mutex_lock(&sdata->local->mtx);
1682         __ieee80211_stop_poll(sdata);
1683         mutex_unlock(&sdata->local->mtx);
1684 }
1685
1686 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1687                                            u16 capab, bool erp_valid, u8 erp)
1688 {
1689         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1690         u32 changed = 0;
1691         bool use_protection;
1692         bool use_short_preamble;
1693         bool use_short_slot;
1694
1695         if (erp_valid) {
1696                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1697                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1698         } else {
1699                 use_protection = false;
1700                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1701         }
1702
1703         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1704         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1705                 use_short_slot = true;
1706
1707         if (use_protection != bss_conf->use_cts_prot) {
1708                 bss_conf->use_cts_prot = use_protection;
1709                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1710         }
1711
1712         if (use_short_preamble != bss_conf->use_short_preamble) {
1713                 bss_conf->use_short_preamble = use_short_preamble;
1714                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1715         }
1716
1717         if (use_short_slot != bss_conf->use_short_slot) {
1718                 bss_conf->use_short_slot = use_short_slot;
1719                 changed |= BSS_CHANGED_ERP_SLOT;
1720         }
1721
1722         return changed;
1723 }
1724
1725 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1726                                      struct cfg80211_bss *cbss,
1727                                      u32 bss_info_changed)
1728 {
1729         struct ieee80211_bss *bss = (void *)cbss->priv;
1730         struct ieee80211_local *local = sdata->local;
1731         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1732
1733         bss_info_changed |= BSS_CHANGED_ASSOC;
1734         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1735                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1736
1737         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1738                 beacon_loss_count * bss_conf->beacon_int));
1739
1740         sdata->u.mgd.associated = cbss;
1741         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1742
1743         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1744
1745         if (sdata->vif.p2p) {
1746                 const struct cfg80211_bss_ies *ies;
1747
1748                 rcu_read_lock();
1749                 ies = rcu_dereference(cbss->ies);
1750                 if (ies) {
1751                         int ret;
1752
1753                         ret = cfg80211_get_p2p_attr(
1754                                         ies->data, ies->len,
1755                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1756                                         (u8 *) &bss_conf->p2p_noa_attr,
1757                                         sizeof(bss_conf->p2p_noa_attr));
1758                         if (ret >= 2) {
1759                                 sdata->u.mgd.p2p_noa_index =
1760                                         bss_conf->p2p_noa_attr.index;
1761                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1762                         }
1763                 }
1764                 rcu_read_unlock();
1765         }
1766
1767         /* just to be sure */
1768         ieee80211_stop_poll(sdata);
1769
1770         ieee80211_led_assoc(local, 1);
1771
1772         if (sdata->u.mgd.have_beacon) {
1773                 /*
1774                  * If the AP is buggy we may get here with no DTIM period
1775                  * known, so assume it's 1 which is the only safe assumption
1776                  * in that case, although if the TIM IE is broken powersave
1777                  * probably just won't work at all.
1778                  */
1779                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1780                 bss_conf->beacon_rate = bss->beacon_rate;
1781                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1782         } else {
1783                 bss_conf->beacon_rate = NULL;
1784                 bss_conf->dtim_period = 0;
1785         }
1786
1787         bss_conf->assoc = 1;
1788
1789         /* Tell the driver to monitor connection quality (if supported) */
1790         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1791             bss_conf->cqm_rssi_thold)
1792                 bss_info_changed |= BSS_CHANGED_CQM;
1793
1794         /* Enable ARP filtering */
1795         if (bss_conf->arp_addr_cnt)
1796                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1797
1798         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1799
1800         mutex_lock(&local->iflist_mtx);
1801         ieee80211_recalc_ps(local, -1);
1802         mutex_unlock(&local->iflist_mtx);
1803
1804         ieee80211_recalc_smps(sdata);
1805         ieee80211_recalc_ps_vif(sdata);
1806
1807         netif_carrier_on(sdata->dev);
1808 }
1809
1810 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1811                                    u16 stype, u16 reason, bool tx,
1812                                    u8 *frame_buf)
1813 {
1814         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1815         struct ieee80211_local *local = sdata->local;
1816         u32 changed = 0;
1817
1818         sdata_assert_lock(sdata);
1819
1820         if (WARN_ON_ONCE(tx && !frame_buf))
1821                 return;
1822
1823         if (WARN_ON(!ifmgd->associated))
1824                 return;
1825
1826         ieee80211_stop_poll(sdata);
1827
1828         ifmgd->associated = NULL;
1829         netif_carrier_off(sdata->dev);
1830
1831         /*
1832          * if we want to get out of ps before disassoc (why?) we have
1833          * to do it before sending disassoc, as otherwise the null-packet
1834          * won't be valid.
1835          */
1836         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1837                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1838                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1839         }
1840         local->ps_sdata = NULL;
1841
1842         /* disable per-vif ps */
1843         ieee80211_recalc_ps_vif(sdata);
1844
1845         /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1846         if (tx)
1847                 ieee80211_flush_queues(local, sdata);
1848
1849         /* deauthenticate/disassociate now */
1850         if (tx || frame_buf)
1851                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1852                                                reason, tx, frame_buf);
1853
1854         /* flush out frame */
1855         if (tx)
1856                 ieee80211_flush_queues(local, sdata);
1857
1858         /* clear bssid only after building the needed mgmt frames */
1859         memset(ifmgd->bssid, 0, ETH_ALEN);
1860
1861         /* remove AP and TDLS peers */
1862         sta_info_flush_defer(sdata);
1863
1864         /* finally reset all BSS / config parameters */
1865         changed |= ieee80211_reset_erp_info(sdata);
1866
1867         ieee80211_led_assoc(local, 0);
1868         changed |= BSS_CHANGED_ASSOC;
1869         sdata->vif.bss_conf.assoc = false;
1870
1871         ifmgd->p2p_noa_index = -1;
1872         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1873                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1874
1875         /* on the next assoc, re-program HT/VHT parameters */
1876         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1877         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1878         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1879         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1880
1881         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1882
1883         del_timer_sync(&local->dynamic_ps_timer);
1884         cancel_work_sync(&local->dynamic_ps_enable_work);
1885
1886         /* Disable ARP filtering */
1887         if (sdata->vif.bss_conf.arp_addr_cnt)
1888                 changed |= BSS_CHANGED_ARP_FILTER;
1889
1890         sdata->vif.bss_conf.qos = false;
1891         changed |= BSS_CHANGED_QOS;
1892
1893         /* The BSSID (not really interesting) and HT changed */
1894         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1895         ieee80211_bss_info_change_notify(sdata, changed);
1896
1897         /* disassociated - set to defaults now */
1898         ieee80211_set_wmm_default(sdata, false);
1899
1900         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1901         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1902         del_timer_sync(&sdata->u.mgd.timer);
1903         del_timer_sync(&sdata->u.mgd.chswitch_timer);
1904
1905         sdata->vif.bss_conf.dtim_period = 0;
1906         sdata->vif.bss_conf.beacon_rate = NULL;
1907
1908         ifmgd->have_beacon = false;
1909
1910         ifmgd->flags = 0;
1911         ieee80211_vif_release_channel(sdata);
1912 }
1913
1914 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1915                              struct ieee80211_hdr *hdr)
1916 {
1917         /*
1918          * We can postpone the mgd.timer whenever receiving unicast frames
1919          * from AP because we know that the connection is working both ways
1920          * at that time. But multicast frames (and hence also beacons) must
1921          * be ignored here, because we need to trigger the timer during
1922          * data idle periods for sending the periodic probe request to the
1923          * AP we're connected to.
1924          */
1925         if (is_multicast_ether_addr(hdr->addr1))
1926                 return;
1927
1928         ieee80211_sta_reset_conn_monitor(sdata);
1929 }
1930
1931 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1932 {
1933         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1934         struct ieee80211_local *local = sdata->local;
1935
1936         mutex_lock(&local->mtx);
1937         if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1938                               IEEE80211_STA_CONNECTION_POLL))) {
1939                 mutex_unlock(&local->mtx);
1940                 return;
1941         }
1942
1943         __ieee80211_stop_poll(sdata);
1944
1945         mutex_lock(&local->iflist_mtx);
1946         ieee80211_recalc_ps(local, -1);
1947         mutex_unlock(&local->iflist_mtx);
1948
1949         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1950                 goto out;
1951
1952         /*
1953          * We've received a probe response, but are not sure whether
1954          * we have or will be receiving any beacons or data, so let's
1955          * schedule the timers again, just in case.
1956          */
1957         ieee80211_sta_reset_beacon_monitor(sdata);
1958
1959         mod_timer(&ifmgd->conn_mon_timer,
1960                   round_jiffies_up(jiffies +
1961                                    IEEE80211_CONNECTION_IDLE_TIME));
1962 out:
1963         mutex_unlock(&local->mtx);
1964 }
1965
1966 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1967                              struct ieee80211_hdr *hdr, bool ack)
1968 {
1969         if (!ieee80211_is_data(hdr->frame_control))
1970             return;
1971
1972         if (ieee80211_is_nullfunc(hdr->frame_control) &&
1973             sdata->u.mgd.probe_send_count > 0) {
1974                 if (ack)
1975                         ieee80211_sta_reset_conn_monitor(sdata);
1976                 else
1977                         sdata->u.mgd.nullfunc_failed = true;
1978                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1979                 return;
1980         }
1981
1982         if (ack)
1983                 ieee80211_sta_reset_conn_monitor(sdata);
1984 }
1985
1986 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1987 {
1988         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1989         const u8 *ssid;
1990         u8 *dst = ifmgd->associated->bssid;
1991         u8 unicast_limit = max(1, max_probe_tries - 3);
1992
1993         /*
1994          * Try sending broadcast probe requests for the last three
1995          * probe requests after the first ones failed since some
1996          * buggy APs only support broadcast probe requests.
1997          */
1998         if (ifmgd->probe_send_count >= unicast_limit)
1999                 dst = NULL;
2000
2001         /*
2002          * When the hardware reports an accurate Tx ACK status, it's
2003          * better to send a nullfunc frame instead of a probe request,
2004          * as it will kick us off the AP quickly if we aren't associated
2005          * anymore. The timeout will be reset if the frame is ACKed by
2006          * the AP.
2007          */
2008         ifmgd->probe_send_count++;
2009
2010         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2011                 ifmgd->nullfunc_failed = false;
2012                 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2013         } else {
2014                 int ssid_len;
2015
2016                 rcu_read_lock();
2017                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2018                 if (WARN_ON_ONCE(ssid == NULL))
2019                         ssid_len = 0;
2020                 else
2021                         ssid_len = ssid[1];
2022
2023                 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2024                                          0, (u32) -1, true, 0,
2025                                          ifmgd->associated->channel, false);
2026                 rcu_read_unlock();
2027         }
2028
2029         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2030         run_again(sdata, ifmgd->probe_timeout);
2031         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2032                 ieee80211_flush_queues(sdata->local, sdata);
2033 }
2034
2035 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2036                                    bool beacon)
2037 {
2038         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2039         bool already = false;
2040
2041         if (!ieee80211_sdata_running(sdata))
2042                 return;
2043
2044         sdata_lock(sdata);
2045
2046         if (!ifmgd->associated)
2047                 goto out;
2048
2049         mutex_lock(&sdata->local->mtx);
2050
2051         if (sdata->local->tmp_channel || sdata->local->scanning) {
2052                 mutex_unlock(&sdata->local->mtx);
2053                 goto out;
2054         }
2055
2056         if (beacon) {
2057                 mlme_dbg_ratelimited(sdata,
2058                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2059                                      beacon_loss_count);
2060
2061                 ieee80211_cqm_rssi_notify(&sdata->vif,
2062                                           NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2063                                           GFP_KERNEL);
2064         }
2065
2066         /*
2067          * The driver/our work has already reported this event or the
2068          * connection monitoring has kicked in and we have already sent
2069          * a probe request. Or maybe the AP died and the driver keeps
2070          * reporting until we disassociate...
2071          *
2072          * In either case we have to ignore the current call to this
2073          * function (except for setting the correct probe reason bit)
2074          * because otherwise we would reset the timer every time and
2075          * never check whether we received a probe response!
2076          */
2077         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2078                             IEEE80211_STA_CONNECTION_POLL))
2079                 already = true;
2080
2081         if (beacon)
2082                 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2083         else
2084                 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2085
2086         mutex_unlock(&sdata->local->mtx);
2087
2088         if (already)
2089                 goto out;
2090
2091         mutex_lock(&sdata->local->iflist_mtx);
2092         ieee80211_recalc_ps(sdata->local, -1);
2093         mutex_unlock(&sdata->local->iflist_mtx);
2094
2095         ifmgd->probe_send_count = 0;
2096         ieee80211_mgd_probe_ap_send(sdata);
2097  out:
2098         sdata_unlock(sdata);
2099 }
2100
2101 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2102                                           struct ieee80211_vif *vif)
2103 {
2104         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2105         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2106         struct cfg80211_bss *cbss;
2107         struct sk_buff *skb;
2108         const u8 *ssid;
2109         int ssid_len;
2110
2111         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2112                 return NULL;
2113
2114         sdata_assert_lock(sdata);
2115
2116         if (ifmgd->associated)
2117                 cbss = ifmgd->associated;
2118         else if (ifmgd->auth_data)
2119                 cbss = ifmgd->auth_data->bss;
2120         else if (ifmgd->assoc_data)
2121                 cbss = ifmgd->assoc_data->bss;
2122         else
2123                 return NULL;
2124
2125         rcu_read_lock();
2126         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2127         if (WARN_ON_ONCE(ssid == NULL))
2128                 ssid_len = 0;
2129         else
2130                 ssid_len = ssid[1];
2131
2132         skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2133                                         (u32) -1, cbss->channel,
2134                                         ssid + 2, ssid_len,
2135                                         NULL, 0, true);
2136         rcu_read_unlock();
2137
2138         return skb;
2139 }
2140 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2141
2142 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2143 {
2144         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2145         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2146
2147         sdata_lock(sdata);
2148         if (!ifmgd->associated) {
2149                 sdata_unlock(sdata);
2150                 return;
2151         }
2152
2153         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2154                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2155                                true, frame_buf);
2156         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2157         ieee80211_wake_queues_by_reason(&sdata->local->hw,
2158                                         IEEE80211_MAX_QUEUE_MAP,
2159                                         IEEE80211_QUEUE_STOP_REASON_CSA);
2160
2161         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2162                               IEEE80211_DEAUTH_FRAME_LEN);
2163         sdata_unlock(sdata);
2164 }
2165
2166 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2167 {
2168         struct ieee80211_sub_if_data *sdata =
2169                 container_of(work, struct ieee80211_sub_if_data,
2170                              u.mgd.beacon_connection_loss_work);
2171         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2172         struct sta_info *sta;
2173
2174         if (ifmgd->associated) {
2175                 rcu_read_lock();
2176                 sta = sta_info_get(sdata, ifmgd->bssid);
2177                 if (sta)
2178                         sta->beacon_loss_count++;
2179                 rcu_read_unlock();
2180         }
2181
2182         if (ifmgd->connection_loss) {
2183                 sdata_info(sdata, "Connection to AP %pM lost\n",
2184                            ifmgd->bssid);
2185                 __ieee80211_disconnect(sdata);
2186         } else {
2187                 ieee80211_mgd_probe_ap(sdata, true);
2188         }
2189 }
2190
2191 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2192 {
2193         struct ieee80211_sub_if_data *sdata =
2194                 container_of(work, struct ieee80211_sub_if_data,
2195                              u.mgd.csa_connection_drop_work);
2196
2197         __ieee80211_disconnect(sdata);
2198 }
2199
2200 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2201 {
2202         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2203         struct ieee80211_hw *hw = &sdata->local->hw;
2204
2205         trace_api_beacon_loss(sdata);
2206
2207         sdata->u.mgd.connection_loss = false;
2208         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2209 }
2210 EXPORT_SYMBOL(ieee80211_beacon_loss);
2211
2212 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2213 {
2214         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2215         struct ieee80211_hw *hw = &sdata->local->hw;
2216
2217         trace_api_connection_loss(sdata);
2218
2219         sdata->u.mgd.connection_loss = true;
2220         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2221 }
2222 EXPORT_SYMBOL(ieee80211_connection_loss);
2223
2224
2225 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2226                                         bool assoc)
2227 {
2228         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2229
2230         sdata_assert_lock(sdata);
2231
2232         if (!assoc) {
2233                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2234
2235                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2236                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2237                 sdata->u.mgd.flags = 0;
2238                 ieee80211_vif_release_channel(sdata);
2239         }
2240
2241         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2242         kfree(auth_data);
2243         sdata->u.mgd.auth_data = NULL;
2244 }
2245
2246 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2247                                      struct ieee80211_mgmt *mgmt, size_t len)
2248 {
2249         struct ieee80211_local *local = sdata->local;
2250         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2251         u8 *pos;
2252         struct ieee802_11_elems elems;
2253         u32 tx_flags = 0;
2254
2255         pos = mgmt->u.auth.variable;
2256         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2257         if (!elems.challenge)
2258                 return;
2259         auth_data->expected_transaction = 4;
2260         drv_mgd_prepare_tx(sdata->local, sdata);
2261         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2262                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2263                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2264         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2265                             elems.challenge - 2, elems.challenge_len + 2,
2266                             auth_data->bss->bssid, auth_data->bss->bssid,
2267                             auth_data->key, auth_data->key_len,
2268                             auth_data->key_idx, tx_flags);
2269 }
2270
2271 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2272                                    struct ieee80211_mgmt *mgmt, size_t len)
2273 {
2274         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2275         u8 bssid[ETH_ALEN];
2276         u16 auth_alg, auth_transaction, status_code;
2277         struct sta_info *sta;
2278
2279         sdata_assert_lock(sdata);
2280
2281         if (len < 24 + 6)
2282                 return;
2283
2284         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2285                 return;
2286
2287         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2288
2289         if (!ether_addr_equal(bssid, mgmt->bssid))
2290                 return;
2291
2292         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2293         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2294         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2295
2296         if (auth_alg != ifmgd->auth_data->algorithm ||
2297             auth_transaction != ifmgd->auth_data->expected_transaction) {
2298                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2299                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2300                            auth_transaction,
2301                            ifmgd->auth_data->expected_transaction);
2302                 return;
2303         }
2304
2305         if (status_code != WLAN_STATUS_SUCCESS) {
2306                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2307                            mgmt->sa, status_code);
2308                 ieee80211_destroy_auth_data(sdata, false);
2309                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2310                 return;
2311         }
2312
2313         switch (ifmgd->auth_data->algorithm) {
2314         case WLAN_AUTH_OPEN:
2315         case WLAN_AUTH_LEAP:
2316         case WLAN_AUTH_FT:
2317         case WLAN_AUTH_SAE:
2318                 break;
2319         case WLAN_AUTH_SHARED_KEY:
2320                 if (ifmgd->auth_data->expected_transaction != 4) {
2321                         ieee80211_auth_challenge(sdata, mgmt, len);
2322                         /* need another frame */
2323                         return;
2324                 }
2325                 break;
2326         default:
2327                 WARN_ONCE(1, "invalid auth alg %d",
2328                           ifmgd->auth_data->algorithm);
2329                 return;
2330         }
2331
2332         sdata_info(sdata, "authenticated\n");
2333         ifmgd->auth_data->done = true;
2334         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2335         ifmgd->auth_data->timeout_started = true;
2336         run_again(sdata, ifmgd->auth_data->timeout);
2337
2338         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2339             ifmgd->auth_data->expected_transaction != 2) {
2340                 /*
2341                  * Report auth frame to user space for processing since another
2342                  * round of Authentication frames is still needed.
2343                  */
2344                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2345                 return;
2346         }
2347
2348         /* move station state to auth */
2349         mutex_lock(&sdata->local->sta_mtx);
2350         sta = sta_info_get(sdata, bssid);
2351         if (!sta) {
2352                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2353                 goto out_err;
2354         }
2355         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2356                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2357                 goto out_err;
2358         }
2359         mutex_unlock(&sdata->local->sta_mtx);
2360
2361         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2362         return;
2363  out_err:
2364         mutex_unlock(&sdata->local->sta_mtx);
2365         /* ignore frame -- wait for timeout */
2366 }
2367
2368
2369 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2370                                      struct ieee80211_mgmt *mgmt, size_t len)
2371 {
2372         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2373         const u8 *bssid = NULL;
2374         u16 reason_code;
2375
2376         sdata_assert_lock(sdata);
2377
2378         if (len < 24 + 2)
2379                 return;
2380
2381         if (!ifmgd->associated ||
2382             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2383                 return;
2384
2385         bssid = ifmgd->associated->bssid;
2386
2387         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2388
2389         sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2390                    bssid, reason_code);
2391
2392         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2393
2394         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2395 }
2396
2397
2398 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2399                                        struct ieee80211_mgmt *mgmt, size_t len)
2400 {
2401         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2402         u16 reason_code;
2403
2404         sdata_assert_lock(sdata);
2405
2406         if (len < 24 + 2)
2407                 return;
2408
2409         if (!ifmgd->associated ||
2410             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2411                 return;
2412
2413         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2414
2415         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2416                    mgmt->sa, reason_code);
2417
2418         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2419
2420         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2421 }
2422
2423 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2424                                 u8 *supp_rates, unsigned int supp_rates_len,
2425                                 u32 *rates, u32 *basic_rates,
2426                                 bool *have_higher_than_11mbit,
2427                                 int *min_rate, int *min_rate_index,
2428                                 int shift, u32 rate_flags)
2429 {
2430         int i, j;
2431
2432         for (i = 0; i < supp_rates_len; i++) {
2433                 int rate = supp_rates[i] & 0x7f;
2434                 bool is_basic = !!(supp_rates[i] & 0x80);
2435
2436                 if ((rate * 5 * (1 << shift)) > 110)
2437                         *have_higher_than_11mbit = true;
2438
2439                 /*
2440                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2441                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2442                  *
2443                  * Note: Even through the membership selector and the basic
2444                  *       rate flag share the same bit, they are not exactly
2445                  *       the same.
2446                  */
2447                 if (!!(supp_rates[i] & 0x80) &&
2448                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2449                         continue;
2450
2451                 for (j = 0; j < sband->n_bitrates; j++) {
2452                         struct ieee80211_rate *br;
2453                         int brate;
2454
2455                         br = &sband->bitrates[j];
2456                         if ((rate_flags & br->flags) != rate_flags)
2457                                 continue;
2458
2459                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2460                         if (brate == rate) {
2461                                 *rates |= BIT(j);
2462                                 if (is_basic)
2463                                         *basic_rates |= BIT(j);
2464                                 if ((rate * 5) < *min_rate) {
2465                                         *min_rate = rate * 5;
2466                                         *min_rate_index = j;
2467                                 }
2468                                 break;
2469                         }
2470                 }
2471         }
2472 }
2473
2474 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2475                                          bool assoc)
2476 {
2477         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2478
2479         sdata_assert_lock(sdata);
2480
2481         if (!assoc) {
2482                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2483
2484                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2485                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2486                 sdata->u.mgd.flags = 0;
2487                 ieee80211_vif_release_channel(sdata);
2488         }
2489
2490         kfree(assoc_data);
2491         sdata->u.mgd.assoc_data = NULL;
2492 }
2493
2494 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2495                                     struct cfg80211_bss *cbss,
2496                                     struct ieee80211_mgmt *mgmt, size_t len)
2497 {
2498         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2499         struct ieee80211_local *local = sdata->local;
2500         struct ieee80211_supported_band *sband;
2501         struct sta_info *sta;
2502         u8 *pos;
2503         u16 capab_info, aid;
2504         struct ieee802_11_elems elems;
2505         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2506         const struct cfg80211_bss_ies *bss_ies = NULL;
2507         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2508         u32 changed = 0;
2509         int err;
2510         bool ret;
2511
2512         /* AssocResp and ReassocResp have identical structure */
2513
2514         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2515         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2516
2517         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2518                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2519                            aid);
2520         aid &= ~(BIT(15) | BIT(14));
2521
2522         ifmgd->broken_ap = false;
2523
2524         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2525                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2526                            aid);
2527                 aid = 0;
2528                 ifmgd->broken_ap = true;
2529         }
2530
2531         pos = mgmt->u.assoc_resp.variable;
2532         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2533
2534         if (!elems.supp_rates) {
2535                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2536                 return false;
2537         }
2538
2539         ifmgd->aid = aid;
2540
2541         /*
2542          * Some APs are erroneously not including some information in their
2543          * (re)association response frames. Try to recover by using the data
2544          * from the beacon or probe response. This seems to afflict mobile
2545          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2546          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2547          */
2548         if ((assoc_data->wmm && !elems.wmm_param) ||
2549             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2550              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2551             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2552              (!elems.vht_cap_elem || !elems.vht_operation))) {
2553                 const struct cfg80211_bss_ies *ies;
2554                 struct ieee802_11_elems bss_elems;
2555
2556                 rcu_read_lock();
2557                 ies = rcu_dereference(cbss->ies);
2558                 if (ies)
2559                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2560                                           GFP_ATOMIC);
2561                 rcu_read_unlock();
2562                 if (!bss_ies)
2563                         return false;
2564
2565                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2566                                        false, &bss_elems);
2567                 if (assoc_data->wmm &&
2568                     !elems.wmm_param && bss_elems.wmm_param) {
2569                         elems.wmm_param = bss_elems.wmm_param;
2570                         sdata_info(sdata,
2571                                    "AP bug: WMM param missing from AssocResp\n");
2572                 }
2573
2574                 /*
2575                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2576                  * have to include the IEs in the (re)association response.
2577                  */
2578                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2579                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2580                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2581                         sdata_info(sdata,
2582                                    "AP bug: HT capability missing from AssocResp\n");
2583                 }
2584                 if (!elems.ht_operation && bss_elems.ht_operation &&
2585                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2586                         elems.ht_operation = bss_elems.ht_operation;
2587                         sdata_info(sdata,
2588                                    "AP bug: HT operation missing from AssocResp\n");
2589                 }
2590                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2591                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2592                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2593                         sdata_info(sdata,
2594                                    "AP bug: VHT capa missing from AssocResp\n");
2595                 }
2596                 if (!elems.vht_operation && bss_elems.vht_operation &&
2597                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2598                         elems.vht_operation = bss_elems.vht_operation;
2599                         sdata_info(sdata,
2600                                    "AP bug: VHT operation missing from AssocResp\n");
2601                 }
2602         }
2603
2604         /*
2605          * We previously checked these in the beacon/probe response, so
2606          * they should be present here. This is just a safety net.
2607          */
2608         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2609             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2610                 sdata_info(sdata,
2611                            "HT AP is missing WMM params or HT capability/operation\n");
2612                 ret = false;
2613                 goto out;
2614         }
2615
2616         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2617             (!elems.vht_cap_elem || !elems.vht_operation)) {
2618                 sdata_info(sdata,
2619                            "VHT AP is missing VHT capability/operation\n");
2620                 ret = false;
2621                 goto out;
2622         }
2623
2624         mutex_lock(&sdata->local->sta_mtx);
2625         /*
2626          * station info was already allocated and inserted before
2627          * the association and should be available to us
2628          */
2629         sta = sta_info_get(sdata, cbss->bssid);
2630         if (WARN_ON(!sta)) {
2631                 mutex_unlock(&sdata->local->sta_mtx);
2632                 ret = false;
2633                 goto out;
2634         }
2635
2636         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2637
2638         /* Set up internal HT/VHT capabilities */
2639         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2640                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2641                                                   elems.ht_cap_elem, sta);
2642
2643         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2644                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2645                                                     elems.vht_cap_elem, sta);
2646
2647         /*
2648          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2649          * in their association response, so ignore that data for our own
2650          * configuration. If it changed since the last beacon, we'll get the
2651          * next beacon and update then.
2652          */
2653
2654         /*
2655          * If an operating mode notification IE is present, override the
2656          * NSS calculation (that would be done in rate_control_rate_init())
2657          * and use the # of streams from that element.
2658          */
2659         if (elems.opmode_notif &&
2660             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2661                 u8 nss;
2662
2663                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2664                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2665                 nss += 1;
2666                 sta->sta.rx_nss = nss;
2667         }
2668
2669         rate_control_rate_init(sta);
2670
2671         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2672                 set_sta_flag(sta, WLAN_STA_MFP);
2673
2674         if (elems.wmm_param)
2675                 set_sta_flag(sta, WLAN_STA_WME);
2676
2677         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2678         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2679                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2680         if (err) {
2681                 sdata_info(sdata,
2682                            "failed to move station %pM to desired state\n",
2683                            sta->sta.addr);
2684                 WARN_ON(__sta_info_destroy(sta));
2685                 mutex_unlock(&sdata->local->sta_mtx);
2686                 ret = false;
2687                 goto out;
2688         }
2689
2690         mutex_unlock(&sdata->local->sta_mtx);
2691
2692         /*
2693          * Always handle WMM once after association regardless
2694          * of the first value the AP uses. Setting -1 here has
2695          * that effect because the AP values is an unsigned
2696          * 4-bit value.
2697          */
2698         ifmgd->wmm_last_param_set = -1;
2699
2700         if (elems.wmm_param)
2701                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2702                                          elems.wmm_param_len);
2703         else
2704                 ieee80211_set_wmm_default(sdata, false);
2705         changed |= BSS_CHANGED_QOS;
2706
2707         /* set AID and assoc capability,
2708          * ieee80211_set_associated() will tell the driver */
2709         bss_conf->aid = aid;
2710         bss_conf->assoc_capability = capab_info;
2711         ieee80211_set_associated(sdata, cbss, changed);
2712
2713         /*
2714          * If we're using 4-addr mode, let the AP know that we're
2715          * doing so, so that it can create the STA VLAN on its side
2716          */
2717         if (ifmgd->use_4addr)
2718                 ieee80211_send_4addr_nullfunc(local, sdata);
2719
2720         /*
2721          * Start timer to probe the connection to the AP now.
2722          * Also start the timer that will detect beacon loss.
2723          */
2724         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2725         ieee80211_sta_reset_beacon_monitor(sdata);
2726
2727         ret = true;
2728  out:
2729         kfree(bss_ies);
2730         return ret;
2731 }
2732
2733 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2734                                          struct ieee80211_mgmt *mgmt,
2735                                          size_t len)
2736 {
2737         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2738         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2739         u16 capab_info, status_code, aid;
2740         struct ieee802_11_elems elems;
2741         u8 *pos;
2742         bool reassoc;
2743         struct cfg80211_bss *bss;
2744
2745         sdata_assert_lock(sdata);
2746
2747         if (!assoc_data)
2748                 return;
2749         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2750                 return;
2751
2752         /*
2753          * AssocResp and ReassocResp have identical structure, so process both
2754          * of them in this function.
2755          */
2756
2757         if (len < 24 + 6)
2758                 return;
2759
2760         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2761         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2762         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2763         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2764
2765         sdata_info(sdata,
2766                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2767                    reassoc ? "Rea" : "A", mgmt->sa,
2768                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2769
2770         pos = mgmt->u.assoc_resp.variable;
2771         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2772
2773         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2774             elems.timeout_int &&
2775             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2776                 u32 tu, ms;
2777                 tu = le32_to_cpu(elems.timeout_int->value);
2778                 ms = tu * 1024 / 1000;
2779                 sdata_info(sdata,
2780                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2781                            mgmt->sa, tu, ms);
2782                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2783                 assoc_data->timeout_started = true;
2784                 if (ms > IEEE80211_ASSOC_TIMEOUT)
2785                         run_again(sdata, assoc_data->timeout);
2786                 return;
2787         }
2788
2789         bss = assoc_data->bss;
2790
2791         if (status_code != WLAN_STATUS_SUCCESS) {
2792                 sdata_info(sdata, "%pM denied association (code=%d)\n",
2793                            mgmt->sa, status_code);
2794                 ieee80211_destroy_assoc_data(sdata, false);
2795         } else {
2796                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2797                         /* oops -- internal error -- send timeout for now */
2798                         ieee80211_destroy_assoc_data(sdata, false);
2799                         cfg80211_assoc_timeout(sdata->dev, bss);
2800                         return;
2801                 }
2802                 sdata_info(sdata, "associated\n");
2803
2804                 /*
2805                  * destroy assoc_data afterwards, as otherwise an idle
2806                  * recalc after assoc_data is NULL but before associated
2807                  * is set can cause the interface to go idle
2808                  */
2809                 ieee80211_destroy_assoc_data(sdata, true);
2810         }
2811
2812         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2813 }
2814
2815 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2816                                   struct ieee80211_mgmt *mgmt, size_t len,
2817                                   struct ieee80211_rx_status *rx_status,
2818                                   struct ieee802_11_elems *elems)
2819 {
2820         struct ieee80211_local *local = sdata->local;
2821         int freq;
2822         struct ieee80211_bss *bss;
2823         struct ieee80211_channel *channel;
2824
2825         sdata_assert_lock(sdata);
2826
2827         if (elems->ds_params)
2828                 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2829                                                       rx_status->band);
2830         else
2831                 freq = rx_status->freq;
2832
2833         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2834
2835         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2836                 return;
2837
2838         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2839                                         channel);
2840         if (bss) {
2841                 ieee80211_rx_bss_put(local, bss);
2842                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2843         }
2844
2845         if (!sdata->u.mgd.associated ||
2846             !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
2847                 return;
2848
2849         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2850                                          elems, true);
2851
2852 }
2853
2854
2855 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2856                                          struct sk_buff *skb)
2857 {
2858         struct ieee80211_mgmt *mgmt = (void *)skb->data;
2859         struct ieee80211_if_managed *ifmgd;
2860         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2861         size_t baselen, len = skb->len;
2862         struct ieee802_11_elems elems;
2863
2864         ifmgd = &sdata->u.mgd;
2865
2866         sdata_assert_lock(sdata);
2867
2868         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2869                 return; /* ignore ProbeResp to foreign address */
2870
2871         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2872         if (baselen > len)
2873                 return;
2874
2875         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2876                                false, &elems);
2877
2878         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2879
2880         if (ifmgd->associated &&
2881             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2882                 ieee80211_reset_ap_probe(sdata);
2883
2884         if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2885             ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2886                 /* got probe response, continue with auth */
2887                 sdata_info(sdata, "direct probe responded\n");
2888                 ifmgd->auth_data->tries = 0;
2889                 ifmgd->auth_data->timeout = jiffies;
2890                 ifmgd->auth_data->timeout_started = true;
2891                 run_again(sdata, ifmgd->auth_data->timeout);
2892         }
2893 }
2894
2895 /*
2896  * This is the canonical list of information elements we care about,
2897  * the filter code also gives us all changes to the Microsoft OUI
2898  * (00:50:F2) vendor IE which is used for WMM which we need to track.
2899  *
2900  * We implement beacon filtering in software since that means we can
2901  * avoid processing the frame here and in cfg80211, and userspace
2902  * will not be able to tell whether the hardware supports it or not.
2903  *
2904  * XXX: This list needs to be dynamic -- userspace needs to be able to
2905  *      add items it requires. It also needs to be able to tell us to
2906  *      look out for other vendor IEs.
2907  */
2908 static const u64 care_about_ies =
2909         (1ULL << WLAN_EID_COUNTRY) |
2910         (1ULL << WLAN_EID_ERP_INFO) |
2911         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2912         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2913         (1ULL << WLAN_EID_HT_CAPABILITY) |
2914         (1ULL << WLAN_EID_HT_OPERATION);
2915
2916 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2917                                      struct ieee80211_mgmt *mgmt, size_t len,
2918                                      struct ieee80211_rx_status *rx_status)
2919 {
2920         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2921         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2922         size_t baselen;
2923         struct ieee802_11_elems elems;
2924         struct ieee80211_local *local = sdata->local;
2925         struct ieee80211_chanctx_conf *chanctx_conf;
2926         struct ieee80211_channel *chan;
2927         struct sta_info *sta;
2928         u32 changed = 0;
2929         bool erp_valid;
2930         u8 erp_value = 0;
2931         u32 ncrc;
2932         u8 *bssid;
2933         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2934
2935         sdata_assert_lock(sdata);
2936
2937         /* Process beacon from the current BSS */
2938         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2939         if (baselen > len)
2940                 return;
2941
2942         rcu_read_lock();
2943         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2944         if (!chanctx_conf) {
2945                 rcu_read_unlock();
2946                 return;
2947         }
2948
2949         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2950                 rcu_read_unlock();
2951                 return;
2952         }
2953         chan = chanctx_conf->def.chan;
2954         rcu_read_unlock();
2955
2956         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2957             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2958                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2959                                        len - baselen, false, &elems);
2960
2961                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2962                 if (elems.tim && !elems.parse_error) {
2963                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
2964                         ifmgd->dtim_period = tim_ie->dtim_period;
2965                 }
2966                 ifmgd->have_beacon = true;
2967                 ifmgd->assoc_data->need_beacon = false;
2968                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2969                         sdata->vif.bss_conf.sync_tsf =
2970                                 le64_to_cpu(mgmt->u.beacon.timestamp);
2971                         sdata->vif.bss_conf.sync_device_ts =
2972                                 rx_status->device_timestamp;
2973                         if (elems.tim)
2974                                 sdata->vif.bss_conf.sync_dtim_count =
2975                                         elems.tim->dtim_count;
2976                         else
2977                                 sdata->vif.bss_conf.sync_dtim_count = 0;
2978                 }
2979                 /* continue assoc process */
2980                 ifmgd->assoc_data->timeout = jiffies;
2981                 ifmgd->assoc_data->timeout_started = true;
2982                 run_again(sdata, ifmgd->assoc_data->timeout);
2983                 return;
2984         }
2985
2986         if (!ifmgd->associated ||
2987             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2988                 return;
2989         bssid = ifmgd->associated->bssid;
2990
2991         /* Track average RSSI from the Beacon frames of the current AP */
2992         ifmgd->last_beacon_signal = rx_status->signal;
2993         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2994                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2995                 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2996                 ifmgd->last_cqm_event_signal = 0;
2997                 ifmgd->count_beacon_signal = 1;
2998                 ifmgd->last_ave_beacon_signal = 0;
2999         } else {
3000                 ifmgd->ave_beacon_signal =
3001                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3002                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3003                          ifmgd->ave_beacon_signal) / 16;
3004                 ifmgd->count_beacon_signal++;
3005         }
3006
3007         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3008             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3009                 int sig = ifmgd->ave_beacon_signal;
3010                 int last_sig = ifmgd->last_ave_beacon_signal;
3011
3012                 /*
3013                  * if signal crosses either of the boundaries, invoke callback
3014                  * with appropriate parameters
3015                  */
3016                 if (sig > ifmgd->rssi_max_thold &&
3017                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3018                         ifmgd->last_ave_beacon_signal = sig;
3019                         drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3020                 } else if (sig < ifmgd->rssi_min_thold &&
3021                            (last_sig >= ifmgd->rssi_max_thold ||
3022                            last_sig == 0)) {
3023                         ifmgd->last_ave_beacon_signal = sig;
3024                         drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3025                 }
3026         }
3027
3028         if (bss_conf->cqm_rssi_thold &&
3029             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3030             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3031                 int sig = ifmgd->ave_beacon_signal / 16;
3032                 int last_event = ifmgd->last_cqm_event_signal;
3033                 int thold = bss_conf->cqm_rssi_thold;
3034                 int hyst = bss_conf->cqm_rssi_hyst;
3035                 if (sig < thold &&
3036                     (last_event == 0 || sig < last_event - hyst)) {
3037                         ifmgd->last_cqm_event_signal = sig;
3038                         ieee80211_cqm_rssi_notify(
3039                                 &sdata->vif,
3040                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3041                                 GFP_KERNEL);
3042                 } else if (sig > thold &&
3043                            (last_event == 0 || sig > last_event + hyst)) {
3044                         ifmgd->last_cqm_event_signal = sig;
3045                         ieee80211_cqm_rssi_notify(
3046                                 &sdata->vif,
3047                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3048                                 GFP_KERNEL);
3049                 }
3050         }
3051
3052         if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
3053                 mlme_dbg_ratelimited(sdata,
3054                                      "cancelling AP probe due to a received beacon\n");
3055                 mutex_lock(&local->mtx);
3056                 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
3057                 ieee80211_run_deferred_scan(local);
3058                 mutex_unlock(&local->mtx);
3059
3060                 mutex_lock(&local->iflist_mtx);
3061                 ieee80211_recalc_ps(local, -1);
3062                 mutex_unlock(&local->iflist_mtx);
3063         }
3064
3065         /*
3066          * Push the beacon loss detection into the future since
3067          * we are processing a beacon from the AP just now.
3068          */
3069         ieee80211_sta_reset_beacon_monitor(sdata);
3070
3071         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3072         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3073                                           len - baselen, false, &elems,
3074                                           care_about_ies, ncrc);
3075
3076         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3077                 bool directed_tim = ieee80211_check_tim(elems.tim,
3078                                                         elems.tim_len,
3079                                                         ifmgd->aid);
3080                 if (directed_tim) {
3081                         if (local->hw.conf.dynamic_ps_timeout > 0) {
3082                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3083                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3084                                         ieee80211_hw_config(local,
3085                                                             IEEE80211_CONF_CHANGE_PS);
3086                                 }
3087                                 ieee80211_send_nullfunc(local, sdata, 0);
3088                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
3089                                 local->pspolling = true;
3090
3091                                 /*
3092                                  * Here is assumed that the driver will be
3093                                  * able to send ps-poll frame and receive a
3094                                  * response even though power save mode is
3095                                  * enabled, but some drivers might require
3096                                  * to disable power save here. This needs
3097                                  * to be investigated.
3098                                  */
3099                                 ieee80211_send_pspoll(local, sdata);
3100                         }
3101                 }
3102         }
3103
3104         if (sdata->vif.p2p) {
3105                 struct ieee80211_p2p_noa_attr noa = {};
3106                 int ret;
3107
3108                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3109                                             len - baselen,
3110                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3111                                             (u8 *) &noa, sizeof(noa));
3112                 if (ret >= 2) {
3113                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3114                                 /* valid noa_attr and index changed */
3115                                 sdata->u.mgd.p2p_noa_index = noa.index;
3116                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3117                                 changed |= BSS_CHANGED_P2P_PS;
3118                                 /*
3119                                  * make sure we update all information, the CRC
3120                                  * mechanism doesn't look at P2P attributes.
3121                                  */
3122                                 ifmgd->beacon_crc_valid = false;
3123                         }
3124                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3125                         /* noa_attr not found and we had valid noa_attr before */
3126                         sdata->u.mgd.p2p_noa_index = -1;
3127                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3128                         changed |= BSS_CHANGED_P2P_PS;
3129                         ifmgd->beacon_crc_valid = false;
3130                 }
3131         }
3132
3133         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3134                 return;
3135         ifmgd->beacon_crc = ncrc;
3136         ifmgd->beacon_crc_valid = true;
3137
3138         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3139
3140         if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3141                                      elems.wmm_param_len))
3142                 changed |= BSS_CHANGED_QOS;
3143
3144         /*
3145          * If we haven't had a beacon before, tell the driver about the
3146          * DTIM period (and beacon timing if desired) now.
3147          */
3148         if (!ifmgd->have_beacon) {
3149                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3150                 if (elems.tim)
3151                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3152                 else
3153                         bss_conf->dtim_period = 1;
3154
3155                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3156                         sdata->vif.bss_conf.sync_tsf =
3157                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3158                         sdata->vif.bss_conf.sync_device_ts =
3159                                 rx_status->device_timestamp;
3160                         if (elems.tim)
3161                                 sdata->vif.bss_conf.sync_dtim_count =
3162                                         elems.tim->dtim_count;
3163                         else
3164                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3165                 }
3166
3167                 changed |= BSS_CHANGED_BEACON_INFO;
3168                 ifmgd->have_beacon = true;
3169
3170                 mutex_lock(&local->iflist_mtx);
3171                 ieee80211_recalc_ps(local, -1);
3172                 mutex_unlock(&local->iflist_mtx);
3173
3174                 ieee80211_recalc_ps_vif(sdata);
3175         }
3176
3177         if (elems.erp_info) {
3178                 erp_valid = true;
3179                 erp_value = elems.erp_info[0];
3180         } else {
3181                 erp_valid = false;
3182         }
3183         changed |= ieee80211_handle_bss_capability(sdata,
3184                         le16_to_cpu(mgmt->u.beacon.capab_info),
3185                         erp_valid, erp_value);
3186
3187         mutex_lock(&local->sta_mtx);
3188         sta = sta_info_get(sdata, bssid);
3189
3190         if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3191                                 elems.vht_operation, bssid, &changed)) {
3192                 mutex_unlock(&local->sta_mtx);
3193                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3194                                        WLAN_REASON_DEAUTH_LEAVING,
3195                                        true, deauth_buf);
3196                 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3197                                       sizeof(deauth_buf));
3198                 return;
3199         }
3200
3201         if (sta && elems.opmode_notif)
3202                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3203                                             rx_status->band, true);
3204         mutex_unlock(&local->sta_mtx);
3205
3206         if (elems.country_elem && elems.pwr_constr_elem &&
3207             mgmt->u.probe_resp.capab_info &
3208                                 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3209                 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3210                                                        elems.country_elem,
3211                                                        elems.country_elem_len,
3212                                                        elems.pwr_constr_elem);
3213
3214         ieee80211_bss_info_change_notify(sdata, changed);
3215 }
3216
3217 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3218                                   struct sk_buff *skb)
3219 {
3220         struct ieee80211_rx_status *rx_status;
3221         struct ieee80211_mgmt *mgmt;
3222         u16 fc;
3223         struct ieee802_11_elems elems;
3224         int ies_len;
3225
3226         rx_status = (struct ieee80211_rx_status *) skb->cb;
3227         mgmt = (struct ieee80211_mgmt *) skb->data;
3228         fc = le16_to_cpu(mgmt->frame_control);
3229
3230         sdata_lock(sdata);
3231
3232         switch (fc & IEEE80211_FCTL_STYPE) {
3233         case IEEE80211_STYPE_BEACON:
3234                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3235                 break;
3236         case IEEE80211_STYPE_PROBE_RESP:
3237                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3238                 break;
3239         case IEEE80211_STYPE_AUTH:
3240                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3241                 break;
3242         case IEEE80211_STYPE_DEAUTH:
3243                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3244                 break;
3245         case IEEE80211_STYPE_DISASSOC:
3246                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3247                 break;
3248         case IEEE80211_STYPE_ASSOC_RESP:
3249         case IEEE80211_STYPE_REASSOC_RESP:
3250                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3251                 break;
3252         case IEEE80211_STYPE_ACTION:
3253                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3254                         ies_len = skb->len -
3255                                   offsetof(struct ieee80211_mgmt,
3256                                            u.action.u.chan_switch.variable);
3257
3258                         if (ies_len < 0)
3259                                 break;
3260
3261                         ieee802_11_parse_elems(
3262                                 mgmt->u.action.u.chan_switch.variable,
3263                                 ies_len, true, &elems);
3264
3265                         if (elems.parse_error)
3266                                 break;
3267
3268                         ieee80211_sta_process_chanswitch(sdata,
3269                                                          rx_status->mactime,
3270                                                          &elems, false);
3271                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3272                         ies_len = skb->len -
3273                                   offsetof(struct ieee80211_mgmt,
3274                                            u.action.u.ext_chan_switch.variable);
3275
3276                         if (ies_len < 0)
3277                                 break;
3278
3279                         ieee802_11_parse_elems(
3280                                 mgmt->u.action.u.ext_chan_switch.variable,
3281                                 ies_len, true, &elems);
3282
3283                         if (elems.parse_error)
3284                                 break;
3285
3286                         /* for the handling code pretend this was also an IE */
3287                         elems.ext_chansw_ie =
3288                                 &mgmt->u.action.u.ext_chan_switch.data;
3289
3290                         ieee80211_sta_process_chanswitch(sdata,
3291                                                          rx_status->mactime,
3292                                                          &elems, false);
3293                 }
3294                 break;
3295         }
3296         sdata_unlock(sdata);
3297 }
3298
3299 static void ieee80211_sta_timer(unsigned long data)
3300 {
3301         struct ieee80211_sub_if_data *sdata =
3302                 (struct ieee80211_sub_if_data *) data;
3303
3304         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3305 }
3306
3307 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3308                                           u8 *bssid, u8 reason, bool tx)
3309 {
3310         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3311
3312         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3313                                tx, frame_buf);
3314
3315         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3316                               IEEE80211_DEAUTH_FRAME_LEN);
3317 }
3318
3319 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3320 {
3321         struct ieee80211_local *local = sdata->local;
3322         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3323         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3324         u32 tx_flags = 0;
3325
3326         sdata_assert_lock(sdata);
3327
3328         if (WARN_ON_ONCE(!auth_data))
3329                 return -EINVAL;
3330
3331         auth_data->tries++;
3332
3333         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3334                 sdata_info(sdata, "authentication with %pM timed out\n",
3335                            auth_data->bss->bssid);
3336
3337                 /*
3338                  * Most likely AP is not in the range so remove the
3339                  * bss struct for that AP.
3340                  */
3341                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3342
3343                 return -ETIMEDOUT;
3344         }
3345
3346         drv_mgd_prepare_tx(local, sdata);
3347
3348         if (auth_data->bss->proberesp_ies) {
3349                 u16 trans = 1;
3350                 u16 status = 0;
3351
3352                 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3353                            auth_data->bss->bssid, auth_data->tries,
3354                            IEEE80211_AUTH_MAX_TRIES);
3355
3356                 auth_data->expected_transaction = 2;
3357
3358                 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3359                         trans = auth_data->sae_trans;
3360                         status = auth_data->sae_status;
3361                         auth_data->expected_transaction = trans;
3362                 }
3363
3364                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3365                         tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3366                                    IEEE80211_TX_INTFL_MLME_CONN_TX;
3367
3368                 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3369                                     auth_data->data, auth_data->data_len,
3370                                     auth_data->bss->bssid,
3371                                     auth_data->bss->bssid, NULL, 0, 0,
3372                                     tx_flags);
3373         } else {
3374                 const u8 *ssidie;
3375
3376                 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3377                            auth_data->bss->bssid, auth_data->tries,
3378                            IEEE80211_AUTH_MAX_TRIES);
3379
3380                 rcu_read_lock();
3381                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3382                 if (!ssidie) {
3383                         rcu_read_unlock();
3384                         return -EINVAL;
3385                 }
3386                 /*
3387                  * Direct probe is sent to broadcast address as some APs
3388                  * will not answer to direct packet in unassociated state.
3389                  */
3390                 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3391                                          NULL, 0, (u32) -1, true, 0,
3392                                          auth_data->bss->channel, false);
3393                 rcu_read_unlock();
3394         }
3395
3396         if (tx_flags == 0) {
3397                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3398                 ifmgd->auth_data->timeout_started = true;
3399                 run_again(sdata, auth_data->timeout);
3400         } else {
3401                 auth_data->timeout_started = false;
3402         }
3403
3404         return 0;
3405 }
3406
3407 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3408 {
3409         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3410         struct ieee80211_local *local = sdata->local;
3411
3412         sdata_assert_lock(sdata);
3413
3414         assoc_data->tries++;
3415         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3416                 sdata_info(sdata, "association with %pM timed out\n",
3417                            assoc_data->bss->bssid);
3418
3419                 /*
3420                  * Most likely AP is not in the range so remove the
3421                  * bss struct for that AP.
3422                  */
3423                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3424
3425                 return -ETIMEDOUT;
3426         }
3427
3428         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3429                    assoc_data->bss->bssid, assoc_data->tries,
3430                    IEEE80211_ASSOC_MAX_TRIES);
3431         ieee80211_send_assoc(sdata);
3432
3433         if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3434                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3435                 assoc_data->timeout_started = true;
3436                 run_again(sdata, assoc_data->timeout);
3437         } else {
3438                 assoc_data->timeout_started = false;
3439         }
3440
3441         return 0;
3442 }
3443
3444 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3445                                   __le16 fc, bool acked)
3446 {
3447         struct ieee80211_local *local = sdata->local;
3448
3449         sdata->u.mgd.status_fc = fc;
3450         sdata->u.mgd.status_acked = acked;
3451         sdata->u.mgd.status_received = true;
3452
3453         ieee80211_queue_work(&local->hw, &sdata->work);
3454 }
3455
3456 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3457 {
3458         struct ieee80211_local *local = sdata->local;
3459         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3460
3461         sdata_lock(sdata);
3462
3463         if (ifmgd->status_received) {
3464                 __le16 fc = ifmgd->status_fc;
3465                 bool status_acked = ifmgd->status_acked;
3466
3467                 ifmgd->status_received = false;
3468                 if (ifmgd->auth_data &&
3469                     (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3470                         if (status_acked) {
3471                                 ifmgd->auth_data->timeout =
3472                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3473                                 run_again(sdata, ifmgd->auth_data->timeout);
3474                         } else {
3475                                 ifmgd->auth_data->timeout = jiffies - 1;
3476                         }
3477                         ifmgd->auth_data->timeout_started = true;
3478                 } else if (ifmgd->assoc_data &&
3479                            (ieee80211_is_assoc_req(fc) ||
3480                             ieee80211_is_reassoc_req(fc))) {
3481                         if (status_acked) {
3482                                 ifmgd->assoc_data->timeout =
3483                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3484                                 run_again(sdata, ifmgd->assoc_data->timeout);
3485                         } else {
3486                                 ifmgd->assoc_data->timeout = jiffies - 1;
3487                         }
3488                         ifmgd->assoc_data->timeout_started = true;
3489                 }
3490         }
3491
3492         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3493             time_after(jiffies, ifmgd->auth_data->timeout)) {
3494                 if (ifmgd->auth_data->done) {
3495                         /*
3496                          * ok ... we waited for assoc but userspace didn't,
3497                          * so let's just kill the auth data
3498                          */
3499                         ieee80211_destroy_auth_data(sdata, false);
3500                 } else if (ieee80211_probe_auth(sdata)) {
3501                         u8 bssid[ETH_ALEN];
3502
3503                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3504
3505                         ieee80211_destroy_auth_data(sdata, false);
3506
3507                         cfg80211_auth_timeout(sdata->dev, bssid);
3508                 }
3509         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3510                 run_again(sdata, ifmgd->auth_data->timeout);
3511
3512         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3513             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3514                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3515                     ieee80211_do_assoc(sdata)) {
3516                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3517
3518                         ieee80211_destroy_assoc_data(sdata, false);
3519                         cfg80211_assoc_timeout(sdata->dev, bss);
3520                 }
3521         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3522                 run_again(sdata, ifmgd->assoc_data->timeout);
3523
3524         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3525                             IEEE80211_STA_CONNECTION_POLL) &&
3526             ifmgd->associated) {
3527                 u8 bssid[ETH_ALEN];
3528                 int max_tries;
3529
3530                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3531
3532                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3533                         max_tries = max_nullfunc_tries;
3534                 else
3535                         max_tries = max_probe_tries;
3536
3537                 /* ACK received for nullfunc probing frame */
3538                 if (!ifmgd->probe_send_count)
3539                         ieee80211_reset_ap_probe(sdata);
3540                 else if (ifmgd->nullfunc_failed) {
3541                         if (ifmgd->probe_send_count < max_tries) {
3542                                 mlme_dbg(sdata,
3543                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3544                                          bssid, ifmgd->probe_send_count,
3545                                          max_tries);
3546                                 ieee80211_mgd_probe_ap_send(sdata);
3547                         } else {
3548                                 mlme_dbg(sdata,
3549                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3550                                          bssid);
3551                                 ieee80211_sta_connection_lost(sdata, bssid,
3552                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3553                                         false);
3554                         }
3555                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3556                         run_again(sdata, ifmgd->probe_timeout);
3557                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3558                         mlme_dbg(sdata,
3559                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3560                                  bssid, probe_wait_ms);
3561                         ieee80211_sta_connection_lost(sdata, bssid,
3562                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3563                 } else if (ifmgd->probe_send_count < max_tries) {
3564                         mlme_dbg(sdata,
3565                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3566                                  bssid, probe_wait_ms,
3567                                  ifmgd->probe_send_count, max_tries);
3568                         ieee80211_mgd_probe_ap_send(sdata);
3569                 } else {
3570                         /*
3571                          * We actually lost the connection ... or did we?
3572                          * Let's make sure!
3573                          */
3574                         wiphy_debug(local->hw.wiphy,
3575                                     "%s: No probe response from AP %pM"
3576                                     " after %dms, disconnecting.\n",
3577                                     sdata->name,
3578                                     bssid, probe_wait_ms);
3579
3580                         ieee80211_sta_connection_lost(sdata, bssid,
3581                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3582                 }
3583         }
3584
3585         sdata_unlock(sdata);
3586 }
3587
3588 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3589 {
3590         struct ieee80211_sub_if_data *sdata =
3591                 (struct ieee80211_sub_if_data *) data;
3592         struct ieee80211_local *local = sdata->local;
3593
3594         if (local->quiescing)
3595                 return;
3596
3597         sdata->u.mgd.connection_loss = false;
3598         ieee80211_queue_work(&sdata->local->hw,
3599                              &sdata->u.mgd.beacon_connection_loss_work);
3600 }
3601
3602 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3603 {
3604         struct ieee80211_sub_if_data *sdata =
3605                 (struct ieee80211_sub_if_data *) data;
3606         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3607         struct ieee80211_local *local = sdata->local;
3608
3609         if (local->quiescing)
3610                 return;
3611
3612         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3613 }
3614
3615 static void ieee80211_sta_monitor_work(struct work_struct *work)
3616 {
3617         struct ieee80211_sub_if_data *sdata =
3618                 container_of(work, struct ieee80211_sub_if_data,
3619                              u.mgd.monitor_work);
3620
3621         ieee80211_mgd_probe_ap(sdata, false);
3622 }
3623
3624 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3625 {
3626         u32 flags;
3627
3628         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3629                 __ieee80211_stop_poll(sdata);
3630
3631                 /* let's probe the connection once */
3632                 flags = sdata->local->hw.flags;
3633                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3634                         ieee80211_queue_work(&sdata->local->hw,
3635                                              &sdata->u.mgd.monitor_work);
3636                 /* and do all the other regular work too */
3637                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3638         }
3639 }
3640
3641 #ifdef CONFIG_PM
3642 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3643 {
3644         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3645
3646         sdata_lock(sdata);
3647         if (!ifmgd->associated) {
3648                 sdata_unlock(sdata);
3649                 return;
3650         }
3651
3652         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3653                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3654                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3655                 ieee80211_sta_connection_lost(sdata,
3656                                               ifmgd->associated->bssid,
3657                                               WLAN_REASON_UNSPECIFIED,
3658                                               true);
3659                 sdata_unlock(sdata);
3660                 return;
3661         }
3662         sdata_unlock(sdata);
3663 }
3664 #endif
3665
3666 /* interface setup */
3667 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3668 {
3669         struct ieee80211_if_managed *ifmgd;
3670
3671         ifmgd = &sdata->u.mgd;
3672         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3673         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3674         INIT_WORK(&ifmgd->beacon_connection_loss_work,
3675                   ieee80211_beacon_connection_loss_work);
3676         INIT_WORK(&ifmgd->csa_connection_drop_work,
3677                   ieee80211_csa_connection_drop_work);
3678         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3679         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3680                     (unsigned long) sdata);
3681         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3682                     (unsigned long) sdata);
3683         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3684                     (unsigned long) sdata);
3685         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3686                     (unsigned long) sdata);
3687
3688         ifmgd->flags = 0;
3689         ifmgd->powersave = sdata->wdev.ps;
3690         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3691         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3692         ifmgd->p2p_noa_index = -1;
3693
3694         if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3695                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3696         else
3697                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3698 }
3699
3700 /* scan finished notification */
3701 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3702 {
3703         struct ieee80211_sub_if_data *sdata;
3704
3705         /* Restart STA timers */
3706         rcu_read_lock();
3707         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3708                 if (ieee80211_sdata_running(sdata))
3709                         ieee80211_restart_sta_timer(sdata);
3710         }
3711         rcu_read_unlock();
3712 }
3713
3714 int ieee80211_max_network_latency(struct notifier_block *nb,
3715                                   unsigned long data, void *dummy)
3716 {
3717         s32 latency_usec = (s32) data;
3718         struct ieee80211_local *local =
3719                 container_of(nb, struct ieee80211_local,
3720                              network_latency_notifier);
3721
3722         mutex_lock(&local->iflist_mtx);
3723         ieee80211_recalc_ps(local, latency_usec);
3724         mutex_unlock(&local->iflist_mtx);
3725
3726         return 0;
3727 }
3728
3729 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3730                                      struct cfg80211_bss *cbss)
3731 {
3732         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3733         const u8 *ht_cap_ie, *vht_cap_ie;
3734         const struct ieee80211_ht_cap *ht_cap;
3735         const struct ieee80211_vht_cap *vht_cap;
3736         u8 chains = 1;
3737
3738         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3739                 return chains;
3740
3741         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3742         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3743                 ht_cap = (void *)(ht_cap_ie + 2);
3744                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3745                 /*
3746                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3747                  *       "Tx Unequal Modulation Supported" fields.
3748                  */
3749         }
3750
3751         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3752                 return chains;
3753
3754         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3755         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3756                 u8 nss;
3757                 u16 tx_mcs_map;
3758
3759                 vht_cap = (void *)(vht_cap_ie + 2);
3760                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3761                 for (nss = 8; nss > 0; nss--) {
3762                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3763                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
3764                                 break;
3765                 }
3766                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3767                 chains = max(chains, nss);
3768         }
3769
3770         return chains;
3771 }
3772
3773 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3774                                   struct cfg80211_bss *cbss)
3775 {
3776         struct ieee80211_local *local = sdata->local;
3777         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3778         const struct ieee80211_ht_operation *ht_oper = NULL;
3779         const struct ieee80211_vht_operation *vht_oper = NULL;
3780         struct ieee80211_supported_band *sband;
3781         struct cfg80211_chan_def chandef;
3782         int ret;
3783
3784         sband = local->hw.wiphy->bands[cbss->channel->band];
3785
3786         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3787                           IEEE80211_STA_DISABLE_80P80MHZ |
3788                           IEEE80211_STA_DISABLE_160MHZ);
3789
3790         rcu_read_lock();
3791
3792         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3793             sband->ht_cap.ht_supported) {
3794                 const u8 *ht_oper_ie, *ht_cap;
3795
3796                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3797                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3798                         ht_oper = (void *)(ht_oper_ie + 2);
3799
3800                 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3801                 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3802                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3803                         ht_oper = NULL;
3804                 }
3805         }
3806
3807         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3808             sband->vht_cap.vht_supported) {
3809                 const u8 *vht_oper_ie, *vht_cap;
3810
3811                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3812                                                    WLAN_EID_VHT_OPERATION);
3813                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3814                         vht_oper = (void *)(vht_oper_ie + 2);
3815                 if (vht_oper && !ht_oper) {
3816                         vht_oper = NULL;
3817                         sdata_info(sdata,
3818                                    "AP advertised VHT without HT, disabling both\n");
3819                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3820                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3821                 }
3822
3823                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3824                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3825                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3826                         vht_oper = NULL;
3827                 }
3828         }
3829
3830         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3831                                                      cbss->channel,
3832                                                      ht_oper, vht_oper,
3833                                                      &chandef, true);
3834
3835         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3836                                       local->rx_chains);
3837
3838         rcu_read_unlock();
3839
3840         /* will change later if needed */
3841         sdata->smps_mode = IEEE80211_SMPS_OFF;
3842
3843         /*
3844          * If this fails (possibly due to channel context sharing
3845          * on incompatible channels, e.g. 80+80 and 160 sharing the
3846          * same control channel) try to use a smaller bandwidth.
3847          */
3848         ret = ieee80211_vif_use_channel(sdata, &chandef,
3849                                         IEEE80211_CHANCTX_SHARED);
3850
3851         /* don't downgrade for 5 and 10 MHz channels, though. */
3852         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3853             chandef.width == NL80211_CHAN_WIDTH_10)
3854                 return ret;
3855
3856         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3857                 ifmgd->flags |= chandef_downgrade(&chandef);
3858                 ret = ieee80211_vif_use_channel(sdata, &chandef,
3859                                                 IEEE80211_CHANCTX_SHARED);
3860         }
3861         return ret;
3862 }
3863
3864 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3865                                      struct cfg80211_bss *cbss, bool assoc)
3866 {
3867         struct ieee80211_local *local = sdata->local;
3868         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3869         struct ieee80211_bss *bss = (void *)cbss->priv;
3870         struct sta_info *new_sta = NULL;
3871         bool have_sta = false;
3872         int err;
3873
3874         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3875                 return -EINVAL;
3876
3877         if (assoc) {
3878                 rcu_read_lock();
3879                 have_sta = sta_info_get(sdata, cbss->bssid);
3880                 rcu_read_unlock();
3881         }
3882
3883         if (!have_sta) {
3884                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3885                 if (!new_sta)
3886                         return -ENOMEM;
3887         }
3888         if (new_sta) {
3889                 u32 rates = 0, basic_rates = 0;
3890                 bool have_higher_than_11mbit;
3891                 int min_rate = INT_MAX, min_rate_index = -1;
3892                 struct ieee80211_chanctx_conf *chanctx_conf;
3893                 struct ieee80211_supported_band *sband;
3894                 const struct cfg80211_bss_ies *ies;
3895                 int shift;
3896                 u32 rate_flags;
3897
3898                 sband = local->hw.wiphy->bands[cbss->channel->band];
3899
3900                 err = ieee80211_prep_channel(sdata, cbss);
3901                 if (err) {
3902                         sta_info_free(local, new_sta);
3903                         return -EINVAL;
3904                 }
3905                 shift = ieee80211_vif_get_shift(&sdata->vif);
3906
3907                 rcu_read_lock();
3908                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3909                 if (WARN_ON(!chanctx_conf)) {
3910                         rcu_read_unlock();
3911                         return -EINVAL;
3912                 }
3913                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3914                 rcu_read_unlock();
3915
3916                 ieee80211_get_rates(sband, bss->supp_rates,
3917                                     bss->supp_rates_len,
3918                                     &rates, &basic_rates,
3919                                     &have_higher_than_11mbit,
3920                                     &min_rate, &min_rate_index,
3921                                     shift, rate_flags);
3922
3923                 /*
3924                  * This used to be a workaround for basic rates missing
3925                  * in the association response frame. Now that we no
3926                  * longer use the basic rates from there, it probably
3927                  * doesn't happen any more, but keep the workaround so
3928                  * in case some *other* APs are buggy in different ways
3929                  * we can connect -- with a warning.
3930                  */
3931                 if (!basic_rates && min_rate_index >= 0) {
3932                         sdata_info(sdata,
3933                                    "No basic rates, using min rate instead\n");
3934                         basic_rates = BIT(min_rate_index);
3935                 }
3936
3937                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3938                 sdata->vif.bss_conf.basic_rates = basic_rates;
3939
3940                 /* cf. IEEE 802.11 9.2.12 */
3941                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3942                     have_higher_than_11mbit)
3943                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3944                 else
3945                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3946
3947                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3948
3949                 /* set timing information */
3950                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3951                 rcu_read_lock();
3952                 ies = rcu_dereference(cbss->beacon_ies);
3953                 if (ies) {
3954                         const u8 *tim_ie;
3955
3956                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3957                         sdata->vif.bss_conf.sync_device_ts =
3958                                 bss->device_ts_beacon;
3959                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3960                                                   ies->data, ies->len);
3961                         if (tim_ie && tim_ie[1] >= 2)
3962                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3963                         else
3964                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3965                 } else if (!(local->hw.flags &
3966                                         IEEE80211_HW_TIMING_BEACON_ONLY)) {
3967                         ies = rcu_dereference(cbss->proberesp_ies);
3968                         /* must be non-NULL since beacon IEs were NULL */
3969                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3970                         sdata->vif.bss_conf.sync_device_ts =
3971                                 bss->device_ts_presp;
3972                         sdata->vif.bss_conf.sync_dtim_count = 0;
3973                 } else {
3974                         sdata->vif.bss_conf.sync_tsf = 0;
3975                         sdata->vif.bss_conf.sync_device_ts = 0;
3976                         sdata->vif.bss_conf.sync_dtim_count = 0;
3977                 }
3978                 rcu_read_unlock();
3979
3980                 /* tell driver about BSSID, basic rates and timing */
3981                 ieee80211_bss_info_change_notify(sdata,
3982                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3983                         BSS_CHANGED_BEACON_INT);
3984
3985                 if (assoc)
3986                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3987
3988                 err = sta_info_insert(new_sta);
3989                 new_sta = NULL;
3990                 if (err) {
3991                         sdata_info(sdata,
3992                                    "failed to insert STA entry for the AP (error %d)\n",
3993                                    err);
3994                         return err;
3995                 }
3996         } else
3997                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3998
3999         return 0;
4000 }
4001
4002 /* config hooks */
4003 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4004                        struct cfg80211_auth_request *req)
4005 {
4006         struct ieee80211_local *local = sdata->local;
4007         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4008         struct ieee80211_mgd_auth_data *auth_data;
4009         u16 auth_alg;
4010         int err;
4011
4012         /* prepare auth data structure */
4013
4014         switch (req->auth_type) {
4015         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4016                 auth_alg = WLAN_AUTH_OPEN;
4017                 break;
4018         case NL80211_AUTHTYPE_SHARED_KEY:
4019                 if (IS_ERR(local->wep_tx_tfm))
4020                         return -EOPNOTSUPP;
4021                 auth_alg = WLAN_AUTH_SHARED_KEY;
4022                 break;
4023         case NL80211_AUTHTYPE_FT:
4024                 auth_alg = WLAN_AUTH_FT;
4025                 break;
4026         case NL80211_AUTHTYPE_NETWORK_EAP:
4027                 auth_alg = WLAN_AUTH_LEAP;
4028                 break;
4029         case NL80211_AUTHTYPE_SAE:
4030                 auth_alg = WLAN_AUTH_SAE;
4031                 break;
4032         default:
4033                 return -EOPNOTSUPP;
4034         }
4035
4036         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4037                             req->ie_len, GFP_KERNEL);
4038         if (!auth_data)
4039                 return -ENOMEM;
4040
4041         auth_data->bss = req->bss;
4042
4043         if (req->sae_data_len >= 4) {
4044                 __le16 *pos = (__le16 *) req->sae_data;
4045                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4046                 auth_data->sae_status = le16_to_cpu(pos[1]);
4047                 memcpy(auth_data->data, req->sae_data + 4,
4048                        req->sae_data_len - 4);
4049                 auth_data->data_len += req->sae_data_len - 4;
4050         }
4051
4052         if (req->ie && req->ie_len) {
4053                 memcpy(&auth_data->data[auth_data->data_len],
4054                        req->ie, req->ie_len);
4055                 auth_data->data_len += req->ie_len;
4056         }
4057
4058         if (req->key && req->key_len) {
4059                 auth_data->key_len = req->key_len;
4060                 auth_data->key_idx = req->key_idx;
4061                 memcpy(auth_data->key, req->key, req->key_len);
4062         }
4063
4064         auth_data->algorithm = auth_alg;
4065
4066         /* try to authenticate/probe */
4067
4068         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4069             ifmgd->assoc_data) {
4070                 err = -EBUSY;
4071                 goto err_free;
4072         }
4073
4074         if (ifmgd->auth_data)
4075                 ieee80211_destroy_auth_data(sdata, false);
4076
4077         /* prep auth_data so we don't go into idle on disassoc */
4078         ifmgd->auth_data = auth_data;
4079
4080         if (ifmgd->associated) {
4081                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4082
4083                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4084                                        WLAN_REASON_UNSPECIFIED,
4085                                        false, frame_buf);
4086
4087                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4088                                       sizeof(frame_buf));
4089         }
4090
4091         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4092
4093         err = ieee80211_prep_connection(sdata, req->bss, false);
4094         if (err)
4095                 goto err_clear;
4096
4097         err = ieee80211_probe_auth(sdata);
4098         if (err) {
4099                 sta_info_destroy_addr(sdata, req->bss->bssid);
4100                 goto err_clear;
4101         }
4102
4103         /* hold our own reference */
4104         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4105         return 0;
4106
4107  err_clear:
4108         memset(ifmgd->bssid, 0, ETH_ALEN);
4109         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4110         ifmgd->auth_data = NULL;
4111  err_free:
4112         kfree(auth_data);
4113         return err;
4114 }
4115
4116 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4117                         struct cfg80211_assoc_request *req)
4118 {
4119         struct ieee80211_local *local = sdata->local;
4120         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4121         struct ieee80211_bss *bss = (void *)req->bss->priv;
4122         struct ieee80211_mgd_assoc_data *assoc_data;
4123         const struct cfg80211_bss_ies *beacon_ies;
4124         struct ieee80211_supported_band *sband;
4125         const u8 *ssidie, *ht_ie, *vht_ie;
4126         int i, err;
4127
4128         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4129         if (!assoc_data)
4130                 return -ENOMEM;
4131
4132         rcu_read_lock();
4133         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4134         if (!ssidie) {
4135                 rcu_read_unlock();
4136                 kfree(assoc_data);
4137                 return -EINVAL;
4138         }
4139         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4140         assoc_data->ssid_len = ssidie[1];
4141         rcu_read_unlock();
4142
4143         if (ifmgd->associated) {
4144                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4145
4146                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4147                                        WLAN_REASON_UNSPECIFIED,
4148                                        false, frame_buf);
4149
4150                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4151                                       sizeof(frame_buf));
4152         }
4153
4154         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4155                 err = -EBUSY;
4156                 goto err_free;
4157         }
4158
4159         if (ifmgd->assoc_data) {
4160                 err = -EBUSY;
4161                 goto err_free;
4162         }
4163
4164         if (ifmgd->auth_data) {
4165                 bool match;
4166
4167                 /* keep sta info, bssid if matching */
4168                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4169                 ieee80211_destroy_auth_data(sdata, match);
4170         }
4171
4172         /* prepare assoc data */
4173
4174         ifmgd->beacon_crc_valid = false;
4175
4176         /*
4177          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4178          * We still associate in non-HT mode (11a/b/g) if any one of these
4179          * ciphers is configured as pairwise.
4180          * We can set this to true for non-11n hardware, that'll be checked
4181          * separately along with the peer capabilities.
4182          */
4183         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4184                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4185                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4186                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4187                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4188                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4189                         netdev_info(sdata->dev,
4190                                     "disabling HT/VHT due to WEP/TKIP use\n");
4191                 }
4192         }
4193
4194         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4195                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4196                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4197         }
4198
4199         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4200                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4201
4202         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4203         sband = local->hw.wiphy->bands[req->bss->channel->band];
4204         if (!sband->ht_cap.ht_supported ||
4205             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4206                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4207                 if (!bss->wmm_used)
4208                         netdev_info(sdata->dev,
4209                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4210         }
4211
4212         /* disable VHT if we don't support it or the AP doesn't use WMM */
4213         if (!sband->vht_cap.vht_supported ||
4214             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4215                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4216                 if (!bss->wmm_used)
4217                         netdev_info(sdata->dev,
4218                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4219         }
4220
4221         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4222         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4223                sizeof(ifmgd->ht_capa_mask));
4224
4225         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4226         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4227                sizeof(ifmgd->vht_capa_mask));
4228
4229         if (req->ie && req->ie_len) {
4230                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4231                 assoc_data->ie_len = req->ie_len;
4232         }
4233
4234         assoc_data->bss = req->bss;
4235
4236         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4237                 if (ifmgd->powersave)
4238                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4239                 else
4240                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4241         } else
4242                 sdata->smps_mode = ifmgd->req_smps;
4243
4244         assoc_data->capability = req->bss->capability;
4245         assoc_data->wmm = bss->wmm_used &&
4246                           (local->hw.queues >= IEEE80211_NUM_ACS);
4247         assoc_data->supp_rates = bss->supp_rates;
4248         assoc_data->supp_rates_len = bss->supp_rates_len;
4249
4250         rcu_read_lock();
4251         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4252         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4253                 assoc_data->ap_ht_param =
4254                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4255         else
4256                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4257         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4258         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4259                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4260                        sizeof(struct ieee80211_vht_cap));
4261         else
4262                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4263         rcu_read_unlock();
4264
4265         if (bss->wmm_used && bss->uapsd_supported &&
4266             (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4267             sdata->wmm_acm != 0xff) {
4268                 assoc_data->uapsd = true;
4269                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4270         } else {
4271                 assoc_data->uapsd = false;
4272                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4273         }
4274
4275         if (req->prev_bssid)
4276                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4277
4278         if (req->use_mfp) {
4279                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4280                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4281         } else {
4282                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4283                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4284         }
4285
4286         if (req->crypto.control_port)
4287                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4288         else
4289                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4290
4291         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4292         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4293
4294         /* kick off associate process */
4295
4296         ifmgd->assoc_data = assoc_data;
4297         ifmgd->dtim_period = 0;
4298         ifmgd->have_beacon = false;
4299
4300         err = ieee80211_prep_connection(sdata, req->bss, true);
4301         if (err)
4302                 goto err_clear;
4303
4304         rcu_read_lock();
4305         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4306
4307         if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4308             !beacon_ies) {
4309                 /*
4310                  * Wait up to one beacon interval ...
4311                  * should this be more if we miss one?
4312                  */
4313                 sdata_info(sdata, "waiting for beacon from %pM\n",
4314                            ifmgd->bssid);
4315                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4316                 assoc_data->timeout_started = true;
4317                 assoc_data->need_beacon = true;
4318         } else if (beacon_ies) {
4319                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4320                                                     beacon_ies->data,
4321                                                     beacon_ies->len);
4322                 u8 dtim_count = 0;
4323
4324                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4325                         const struct ieee80211_tim_ie *tim;
4326                         tim = (void *)(tim_ie + 2);
4327                         ifmgd->dtim_period = tim->dtim_period;
4328                         dtim_count = tim->dtim_count;
4329                 }
4330                 ifmgd->have_beacon = true;
4331                 assoc_data->timeout = jiffies;
4332                 assoc_data->timeout_started = true;
4333
4334                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4335                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4336                         sdata->vif.bss_conf.sync_device_ts =
4337                                 bss->device_ts_beacon;
4338                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4339                 }
4340         } else {
4341                 assoc_data->timeout = jiffies;
4342                 assoc_data->timeout_started = true;
4343         }
4344         rcu_read_unlock();
4345
4346         run_again(sdata, assoc_data->timeout);
4347
4348         if (bss->corrupt_data) {
4349                 char *corrupt_type = "data";
4350                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4351                         if (bss->corrupt_data &
4352                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4353                                 corrupt_type = "beacon and probe response";
4354                         else
4355                                 corrupt_type = "beacon";
4356                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4357                         corrupt_type = "probe response";
4358                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4359                            corrupt_type);
4360         }
4361
4362         return 0;
4363  err_clear:
4364         memset(ifmgd->bssid, 0, ETH_ALEN);
4365         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4366         ifmgd->assoc_data = NULL;
4367  err_free:
4368         kfree(assoc_data);
4369         return err;
4370 }
4371
4372 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4373                          struct cfg80211_deauth_request *req)
4374 {
4375         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4376         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4377         bool tx = !req->local_state_change;
4378         bool report_frame = false;
4379
4380         sdata_info(sdata,
4381                    "deauthenticating from %pM by local choice (reason=%d)\n",
4382                    req->bssid, req->reason_code);
4383
4384         if (ifmgd->auth_data) {
4385                 drv_mgd_prepare_tx(sdata->local, sdata);
4386                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4387                                                IEEE80211_STYPE_DEAUTH,
4388                                                req->reason_code, tx,
4389                                                frame_buf);
4390                 ieee80211_destroy_auth_data(sdata, false);
4391
4392                 report_frame = true;
4393                 goto out;
4394         }
4395
4396         if (ifmgd->associated &&
4397             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4398                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4399                                        req->reason_code, tx, frame_buf);
4400                 report_frame = true;
4401         }
4402
4403  out:
4404         if (report_frame)
4405                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4406                                       IEEE80211_DEAUTH_FRAME_LEN);
4407
4408         return 0;
4409 }
4410
4411 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4412                            struct cfg80211_disassoc_request *req)
4413 {
4414         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4415         u8 bssid[ETH_ALEN];
4416         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4417
4418         /*
4419          * cfg80211 should catch this ... but it's racy since
4420          * we can receive a disassoc frame, process it, hand it
4421          * to cfg80211 while that's in a locked section already
4422          * trying to tell us that the user wants to disconnect.
4423          */
4424         if (ifmgd->associated != req->bss)
4425                 return -ENOLINK;
4426
4427         sdata_info(sdata,
4428                    "disassociating from %pM by local choice (reason=%d)\n",
4429                    req->bss->bssid, req->reason_code);
4430
4431         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4432         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4433                                req->reason_code, !req->local_state_change,
4434                                frame_buf);
4435
4436         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4437                               IEEE80211_DEAUTH_FRAME_LEN);
4438
4439         return 0;
4440 }
4441
4442 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4443 {
4444         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4445
4446         /*
4447          * Make sure some work items will not run after this,
4448          * they will not do anything but might not have been
4449          * cancelled when disconnecting.
4450          */
4451         cancel_work_sync(&ifmgd->monitor_work);
4452         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4453         cancel_work_sync(&ifmgd->request_smps_work);
4454         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4455         cancel_work_sync(&ifmgd->chswitch_work);
4456
4457         sdata_lock(sdata);
4458         if (ifmgd->assoc_data) {
4459                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4460                 ieee80211_destroy_assoc_data(sdata, false);
4461                 cfg80211_assoc_timeout(sdata->dev, bss);
4462         }
4463         if (ifmgd->auth_data)
4464                 ieee80211_destroy_auth_data(sdata, false);
4465         del_timer_sync(&ifmgd->timer);
4466         sdata_unlock(sdata);
4467 }
4468
4469 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4470                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4471                                gfp_t gfp)
4472 {
4473         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4474
4475         trace_api_cqm_rssi_notify(sdata, rssi_event);
4476
4477         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4478 }
4479 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);