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         }
 194
 195         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
 196
 197         return ret;
 198 }
 199
 200 static u32
 201 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 202                              struct ieee80211_supported_band *sband,
 203                              struct ieee80211_channel *channel,
 204                              const struct ieee80211_ht_operation *ht_oper,
 205                              const struct ieee80211_vht_operation *vht_oper,
 206                              struct cfg80211_chan_def *chandef, bool verbose)
 207 {
 208         struct cfg80211_chan_def vht_chandef;
 209         u32 ht_cfreq, ret;
 210
 211         chandef->chan = channel;
 212         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 213         chandef->center_freq1 = channel->center_freq;
 214         chandef->center_freq2 = 0;
 215
 216         if (!ht_oper || !sband->ht_cap.ht_supported) {
 217                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 218                 goto out;
 219         }
 220
 221         chandef->width = NL80211_CHAN_WIDTH_20;
 222
 223         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 224                                                   channel->band);
 225         /* check that channel matches the right operating channel */
 226         if (channel->center_freq != ht_cfreq) {
 227                 /*
 228                  * It's possible that some APs are confused here;
 229                  * Netgear WNDR3700 sometimes reports 4 higher than
 230                  * the actual channel in association responses, but
 231                  * since we look at probe response/beacon data here
 232                  * it should be OK.
 233                  */
 234                 if (verbose)
 235                         sdata_info(sdata,
 236                                    "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 237                                    channel->center_freq, ht_cfreq,
 238                                    ht_oper->primary_chan, channel->band);
 239                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 240                 goto out;
 241         }
 242
 243         /* check 40 MHz support, if we have it */
 244         if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 245                 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 246                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 247                         chandef->width = NL80211_CHAN_WIDTH_40;
 248                         chandef->center_freq1 += 10;
 249                         break;
 250                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 251                         chandef->width = NL80211_CHAN_WIDTH_40;
 252                         chandef->center_freq1 -= 10;
 253                         break;
 254                 }
 255         } else {
 256                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 257                 ret = IEEE80211_STA_DISABLE_VHT;
 258                 /* also mark 40 MHz disabled */
 259                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 260                 goto out;
 261         }
 262
 263         if (!vht_oper || !sband->vht_cap.vht_supported) {
 264                 ret = IEEE80211_STA_DISABLE_VHT;
 265                 goto out;
 266         }
 267
 268         vht_chandef.chan = channel;
 269         vht_chandef.center_freq1 =
 270                 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
 271                                                channel->band);
 272         vht_chandef.center_freq2 = 0;
 273
 274         switch (vht_oper->chan_width) {
 275         case IEEE80211_VHT_CHANWIDTH_USE_HT:
 276                 vht_chandef.width = chandef->width;
 277                 break;
 278         case IEEE80211_VHT_CHANWIDTH_80MHZ:
 279                 vht_chandef.width = NL80211_CHAN_WIDTH_80;
 280                 break;
 281         case IEEE80211_VHT_CHANWIDTH_160MHZ:
 282                 vht_chandef.width = NL80211_CHAN_WIDTH_160;
 283                 break;
 284         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
 285                 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
 286                 vht_chandef.center_freq2 =
 287                         ieee80211_channel_to_frequency(
 288                                 vht_oper->center_freq_seg2_idx,
 289                                 channel->band);
 290                 break;
 291         default:
 292                 if (verbose)
 293                         sdata_info(sdata,
 294                                    "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
 295                                    vht_oper->chan_width);
 296                 ret = IEEE80211_STA_DISABLE_VHT;
 297                 goto out;
 298         }
 299
 300         if (!cfg80211_chandef_valid(&vht_chandef)) {
 301                 if (verbose)
 302                         sdata_info(sdata,
 303                                    "AP VHT information is invalid, disable VHT\n");
 304                 ret = IEEE80211_STA_DISABLE_VHT;
 305                 goto out;
 306         }
 307
 308         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 309                 ret = 0;
 310                 goto out;
 311         }
 312
 313         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 314                 if (verbose)
 315                         sdata_info(sdata,
 316                                    "AP VHT information doesn't match HT, disable VHT\n");
 317                 ret = IEEE80211_STA_DISABLE_VHT;
 318                 goto out;
 319         }
 320
 321         *chandef = vht_chandef;
 322
 323         ret = 0;
 324
 325 out:
 326         /* don't print the message below for VHT mismatch if VHT is disabled */
 327         if (ret & IEEE80211_STA_DISABLE_VHT)
 328                 vht_chandef = *chandef;
 329
 330         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 331                                         IEEE80211_CHAN_DISABLED)) {
 332                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 333                         ret = IEEE80211_STA_DISABLE_HT |
 334                               IEEE80211_STA_DISABLE_VHT;
 335                         goto out;
 336                 }
 337
 338                 ret |= chandef_downgrade(chandef);
 339         }
 340
 341         if (chandef->width != vht_chandef.width && verbose)
 342                 sdata_info(sdata,
 343                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 344
 345         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 346         return ret;
 347 }
 348
 349 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 350                                struct sta_info *sta,
 351                                const struct ieee80211_ht_operation *ht_oper,
 352                                const struct ieee80211_vht_operation *vht_oper,
 353                                const u8 *bssid, u32 *changed)
 354 {
 355         struct ieee80211_local *local = sdata->local;
 356         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 357         struct ieee80211_supported_band *sband;
 358         struct ieee80211_channel *chan;
 359         struct cfg80211_chan_def chandef;
 360         u16 ht_opmode;
 361         u32 flags;
 362         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 363         int ret;
 364
 365         /* if HT was/is disabled, don't track any bandwidth changes */
 366         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 367                 return 0;
 368
 369         /* don't check VHT if we associated as non-VHT station */
 370         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 371                 vht_oper = NULL;
 372
 373         if (WARN_ON_ONCE(!sta))
 374                 return -EINVAL;
 375
 376         chan = sdata->vif.bss_conf.chandef.chan;
 377         sband = local->hw.wiphy->bands[chan->band];
 378
 379         /* calculate new channel (type) based on HT/VHT operation IEs */
 380         flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
 381                                              vht_oper, &chandef, false);
 382
 383         /*
 384          * Downgrade the new channel if we associated with restricted
 385          * capabilities. For example, if we associated as a 20 MHz STA
 386          * to a 40 MHz AP (due to regulatory, capabilities or config
 387          * reasons) then switching to a 40 MHz channel now won't do us
 388          * any good -- we couldn't use it with the AP.
 389          */
 390         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 391             chandef.width == NL80211_CHAN_WIDTH_80P80)
 392                 flags |= chandef_downgrade(&chandef);
 393         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 394             chandef.width == NL80211_CHAN_WIDTH_160)
 395                 flags |= chandef_downgrade(&chandef);
 396         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 397             chandef.width > NL80211_CHAN_WIDTH_20)
 398                 flags |= chandef_downgrade(&chandef);
 399
 400         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 401                 return 0;
 402
 403         sdata_info(sdata,
 404                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 405                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 406                    chandef.center_freq1, chandef.center_freq2);
 407
 408         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 409                                       IEEE80211_STA_DISABLE_VHT |
 410                                       IEEE80211_STA_DISABLE_40MHZ |
 411                                       IEEE80211_STA_DISABLE_80P80MHZ |
 412                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 413             !cfg80211_chandef_valid(&chandef)) {
 414                 sdata_info(sdata,
 415                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 416                            ifmgd->bssid);
 417                 return -EINVAL;
 418         }
 419
 420         switch (chandef.width) {
 421         case NL80211_CHAN_WIDTH_20_NOHT:
 422         case NL80211_CHAN_WIDTH_20:
 423                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 424                 break;
 425         case NL80211_CHAN_WIDTH_40:
 426                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 427                 break;
 428         case NL80211_CHAN_WIDTH_80:
 429                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 430                 break;
 431         case NL80211_CHAN_WIDTH_80P80:
 432         case NL80211_CHAN_WIDTH_160:
 433                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 434                 break;
 435         default:
 436                 return -EINVAL;
 437         }
 438
 439         if (new_sta_bw > sta->cur_max_bandwidth)
 440                 new_sta_bw = sta->cur_max_bandwidth;
 441
 442         if (new_sta_bw < sta->sta.bandwidth) {
 443                 sta->sta.bandwidth = new_sta_bw;
 444                 rate_control_rate_update(local, sband, sta,
 445                                          IEEE80211_RC_BW_CHANGED);
 446         }
 447
 448         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 449         if (ret) {
 450                 sdata_info(sdata,
 451                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 452                            ifmgd->bssid);
 453                 return ret;
 454         }
 455
 456         if (new_sta_bw > sta->sta.bandwidth) {
 457                 sta->sta.bandwidth = new_sta_bw;
 458                 rate_control_rate_update(local, sband, sta,
 459                                          IEEE80211_RC_BW_CHANGED);
 460         }
 461
 462         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 463
 464         /* if bss configuration changed store the new one */
 465         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 466                 *changed |= BSS_CHANGED_HT;
 467                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 468         }
 469
 470         return 0;
 471 }
 472
 473 /* frame sending functions */
 474
 475 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
 476                                       struct ieee80211_supported_band *sband,
 477                                       u32 *rates)
 478 {
 479         int i, j, count;
 480         *rates = 0;
 481         count = 0;
 482         for (i = 0; i < supp_rates_len; i++) {
 483                 int rate = (supp_rates[i] & 0x7F) * 5;
 484
 485                 for (j = 0; j < sband->n_bitrates; j++)
 486                         if (sband->bitrates[j].bitrate == rate) {
 487                                 *rates |= BIT(j);
 488                                 count++;
 489                                 break;
 490                         }
 491         }
 492
 493         return count;
 494 }
 495
 496 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 497                                 struct sk_buff *skb, u8 ap_ht_param,
 498                                 struct ieee80211_supported_band *sband,
 499                                 struct ieee80211_channel *channel,
 500                                 enum ieee80211_smps_mode smps)
 501 {
 502         u8 *pos;
 503         u32 flags = channel->flags;
 504         u16 cap;
 505         struct ieee80211_sta_ht_cap ht_cap;
 506
 507         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 508
 509         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 510         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 511
 512         /* determine capability flags */
 513         cap = ht_cap.cap;
 514
 515         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 516         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 517                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 518                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 519                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 520                 }
 521                 break;
 522         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 523                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 524                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 525                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 526                 }
 527                 break;
 528         }
 529
 530         /*
 531          * If 40 MHz was disabled associate as though we weren't
 532          * capable of 40 MHz -- some broken APs will never fall
 533          * back to trying to transmit in 20 MHz.
 534          */
 535         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 536                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 537                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 538         }
 539
 540         /* set SM PS mode properly */
 541         cap &= ~IEEE80211_HT_CAP_SM_PS;
 542         switch (smps) {
 543         case IEEE80211_SMPS_AUTOMATIC:
 544         case IEEE80211_SMPS_NUM_MODES:
 545                 WARN_ON(1);
 546         case IEEE80211_SMPS_OFF:
 547                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 548                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 549                 break;
 550         case IEEE80211_SMPS_STATIC:
 551                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 552                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 553                 break;
 554         case IEEE80211_SMPS_DYNAMIC:
 555                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 556                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 557                 break;
 558         }
 559
 560         /* reserve and fill IE */
 561         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 562         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 563 }
 564
 565 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 566                                  struct sk_buff *skb,
 567                                  struct ieee80211_supported_band *sband,
 568                                  struct ieee80211_vht_cap *ap_vht_cap)
 569 {
 570         u8 *pos;
 571         u32 cap;
 572         struct ieee80211_sta_vht_cap vht_cap;
 573
 574         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 575
 576         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 577         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 578
 579         /* determine capability flags */
 580         cap = vht_cap.cap;
 581
 582         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 583                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
 584                 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 585         }
 586
 587         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 588                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 589                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 590         }
 591
 592         /*
 593          * Some APs apparently get confused if our capabilities are better
 594          * than theirs, so restrict what we advertise in the assoc request.
 595          */
 596         if (!(ap_vht_cap->vht_cap_info &
 597                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 598                 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
 599
 600         /* reserve and fill IE */
 601         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 602         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 603 }
 604
 605 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 606 {
 607         struct ieee80211_local *local = sdata->local;
 608         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 609         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 610         struct sk_buff *skb;
 611         struct ieee80211_mgmt *mgmt;
 612         u8 *pos, qos_info;
 613         size_t offset = 0, noffset;
 614         int i, count, rates_len, supp_rates_len;
 615         u16 capab;
 616         struct ieee80211_supported_band *sband;
 617         struct ieee80211_chanctx_conf *chanctx_conf;
 618         struct ieee80211_channel *chan;
 619         u32 rates = 0;
 620
 621         sdata_assert_lock(sdata);
 622
 623         rcu_read_lock();
 624         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 625         if (WARN_ON(!chanctx_conf)) {
 626                 rcu_read_unlock();
 627                 return;
 628         }
 629         chan = chanctx_conf->def.chan;
 630         rcu_read_unlock();
 631         sband = local->hw.wiphy->bands[chan->band];
 632
 633         if (assoc_data->supp_rates_len) {
 634                 /*
 635                  * Get all rates supported by the device and the AP as
 636                  * some APs don't like getting a superset of their rates
 637                  * in the association request (e.g. D-Link DAP 1353 in
 638                  * b-only mode)...
 639                  */
 640                 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
 641                                                        assoc_data->supp_rates_len,
 642                                                        sband, &rates);
 643         } else {
 644                 /*
 645                  * In case AP not provide any supported rates information
 646                  * before association, we send information element(s) with
 647                  * all rates that we support.
 648                  */
 649                 rates = ~0;
 650                 rates_len = sband->n_bitrates;
 651         }
 652
 653         skb = alloc_skb(local->hw.extra_tx_headroom +
 654                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 655                         2 + assoc_data->ssid_len + /* SSID */
 656                         4 + rates_len + /* (extended) rates */
 657                         4 + /* power capability */
 658                         2 + 2 * sband->n_channels + /* supported channels */
 659                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 660                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 661                         assoc_data->ie_len + /* extra IEs */
 662                         9, /* WMM */
 663                         GFP_KERNEL);
 664         if (!skb)
 665                 return;
 666
 667         skb_reserve(skb, local->hw.extra_tx_headroom);
 668
 669         capab = WLAN_CAPABILITY_ESS;
 670
 671         if (sband->band == IEEE80211_BAND_2GHZ) {
 672                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 673                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 674                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 675                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 676         }
 677
 678         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 679                 capab |= WLAN_CAPABILITY_PRIVACY;
 680
 681         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 682             (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 683                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 684
 685         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 686         memset(mgmt, 0, 24);
 687         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 688         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 689         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 690
 691         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 692                 skb_put(skb, 10);
 693                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 694                                                   IEEE80211_STYPE_REASSOC_REQ);
 695                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 696                 mgmt->u.reassoc_req.listen_interval =
 697                                 cpu_to_le16(local->hw.conf.listen_interval);
 698                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 699                        ETH_ALEN);
 700         } else {
 701                 skb_put(skb, 4);
 702                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 703                                                   IEEE80211_STYPE_ASSOC_REQ);
 704                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 705                 mgmt->u.assoc_req.listen_interval =
 706                                 cpu_to_le16(local->hw.conf.listen_interval);
 707         }
 708
 709         /* SSID */
 710         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 711         *pos++ = WLAN_EID_SSID;
 712         *pos++ = assoc_data->ssid_len;
 713         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 714
 715         /* add all rates which were marked to be used above */
 716         supp_rates_len = rates_len;
 717         if (supp_rates_len > 8)
 718                 supp_rates_len = 8;
 719
 720         pos = skb_put(skb, supp_rates_len + 2);
 721         *pos++ = WLAN_EID_SUPP_RATES;
 722         *pos++ = supp_rates_len;
 723
 724         count = 0;
 725         for (i = 0; i < sband->n_bitrates; i++) {
 726                 if (BIT(i) & rates) {
 727                         int rate = sband->bitrates[i].bitrate;
 728                         *pos++ = (u8) (rate / 5);
 729                         if (++count == 8)
 730                                 break;
 731                 }
 732         }
 733
 734         if (rates_len > count) {
 735                 pos = skb_put(skb, rates_len - count + 2);
 736                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 737                 *pos++ = rates_len - count;
 738
 739                 for (i++; i < sband->n_bitrates; i++) {
 740                         if (BIT(i) & rates) {
 741                                 int rate = sband->bitrates[i].bitrate;
 742                                 *pos++ = (u8) (rate / 5);
 743                         }
 744                 }
 745         }
 746
 747         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 748                 /* 1. power capabilities */
 749                 pos = skb_put(skb, 4);
 750                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 751                 *pos++ = 2;
 752                 *pos++ = 0; /* min tx power */
 753                 *pos++ = chan->max_power; /* max tx power */
 754
 755                 /* 2. supported channels */
 756                 /* TODO: get this in reg domain format */
 757                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 758                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 759                 *pos++ = 2 * sband->n_channels;
 760                 for (i = 0; i < sband->n_channels; i++) {
 761                         *pos++ = ieee80211_frequency_to_channel(
 762                                         sband->channels[i].center_freq);
 763                         *pos++ = 1; /* one channel in the subband*/
 764                 }
 765         }
 766
 767         /* if present, add any custom IEs that go before HT */
 768         if (assoc_data->ie_len && assoc_data->ie) {
 769                 static const u8 before_ht[] = {
 770                         WLAN_EID_SSID,
 771                         WLAN_EID_SUPP_RATES,
 772                         WLAN_EID_EXT_SUPP_RATES,
 773                         WLAN_EID_PWR_CAPABILITY,
 774                         WLAN_EID_SUPPORTED_CHANNELS,
 775                         WLAN_EID_RSN,
 776                         WLAN_EID_QOS_CAPA,
 777                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 778                         WLAN_EID_MOBILITY_DOMAIN,
 779                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 780                 };
 781                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 782                                              before_ht, ARRAY_SIZE(before_ht),
 783                                              offset);
 784                 pos = skb_put(skb, noffset - offset);
 785                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 786                 offset = noffset;
 787         }
 788
 789         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 790                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 791                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 792
 793         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 794                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 795                                     sband, chan, sdata->smps_mode);
 796
 797         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 798                 ieee80211_add_vht_ie(sdata, skb, sband,
 799                                      &assoc_data->ap_vht_cap);
 800
 801         /* if present, add any custom non-vendor IEs that go after HT */
 802         if (assoc_data->ie_len && assoc_data->ie) {
 803                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 804                                                     assoc_data->ie_len,
 805                                                     offset);
 806                 pos = skb_put(skb, noffset - offset);
 807                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 808                 offset = noffset;
 809         }
 810
 811         if (assoc_data->wmm) {
 812                 if (assoc_data->uapsd) {
 813                         qos_info = ifmgd->uapsd_queues;
 814                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 815                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 816                 } else {
 817                         qos_info = 0;
 818                 }
 819
 820                 pos = skb_put(skb, 9);
 821                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 822                 *pos++ = 7; /* len */
 823                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 824                 *pos++ = 0x50;
 825                 *pos++ = 0xf2;
 826                 *pos++ = 2; /* WME */
 827                 *pos++ = 0; /* WME info */
 828                 *pos++ = 1; /* WME ver */
 829                 *pos++ = qos_info;
 830         }
 831
 832         /* add any remaining custom (i.e. vendor specific here) IEs */
 833         if (assoc_data->ie_len && assoc_data->ie) {
 834                 noffset = assoc_data->ie_len;
 835                 pos = skb_put(skb, noffset - offset);
 836                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 837         }
 838
 839         drv_mgd_prepare_tx(local, sdata);
 840
 841         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 842         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 843                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 844                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 845         ieee80211_tx_skb(sdata, skb);
 846 }
 847
 848 void ieee80211_send_pspoll(struct ieee80211_local *local,
 849                            struct ieee80211_sub_if_data *sdata)
 850 {
 851         struct ieee80211_pspoll *pspoll;
 852         struct sk_buff *skb;
 853
 854         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 855         if (!skb)
 856                 return;
 857
 858         pspoll = (struct ieee80211_pspoll *) skb->data;
 859         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 860
 861         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 862         ieee80211_tx_skb(sdata, skb);
 863 }
 864
 865 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 866                              struct ieee80211_sub_if_data *sdata,
 867                              int powersave)
 868 {
 869         struct sk_buff *skb;
 870         struct ieee80211_hdr_3addr *nullfunc;
 871         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 872
 873         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 874         if (!skb)
 875                 return;
 876
 877         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 878         if (powersave)
 879                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 880
 881         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 882                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 883
 884         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 885                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 886
 887         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
 888                             IEEE80211_STA_CONNECTION_POLL))
 889                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 890
 891         ieee80211_tx_skb(sdata, skb);
 892 }
 893
 894 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 895                                           struct ieee80211_sub_if_data *sdata)
 896 {
 897         struct sk_buff *skb;
 898         struct ieee80211_hdr *nullfunc;
 899         __le16 fc;
 900
 901         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 902                 return;
 903
 904         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 905         if (!skb)
 906                 return;
 907
 908         skb_reserve(skb, local->hw.extra_tx_headroom);
 909
 910         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 911         memset(nullfunc, 0, 30);
 912         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 913                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 914         nullfunc->frame_control = fc;
 915         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 916         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 917         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 918         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 919
 920         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 921         ieee80211_tx_skb(sdata, skb);
 922 }
 923
 924 /* spectrum management related things */
 925 static void ieee80211_chswitch_work(struct work_struct *work)
 926 {
 927         struct ieee80211_sub_if_data *sdata =
 928                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 929         struct ieee80211_local *local = sdata->local;
 930         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 931
 932         if (!ieee80211_sdata_running(sdata))
 933                 return;
 934
 935         sdata_lock(sdata);
 936         if (!ifmgd->associated)
 937                 goto out;
 938
 939         local->_oper_chandef = local->csa_chandef;
 940
 941         if (!local->ops->channel_switch) {
 942                 /* call "hw_config" only if doing sw channel switch */
 943                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
 944         } else {
 945                 /* update the device channel directly */
 946                 local->hw.conf.chandef = local->_oper_chandef;
 947         }
 948
 949         /* XXX: shouldn't really modify cfg80211-owned data! */
 950         ifmgd->associated->channel = local->_oper_chandef.chan;
 951
 952         /* XXX: wait for a beacon first? */
 953         ieee80211_wake_queues_by_reason(&local->hw,
 954                                         IEEE80211_MAX_QUEUE_MAP,
 955                                         IEEE80211_QUEUE_STOP_REASON_CSA);
 956  out:
 957         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
 958         sdata_unlock(sdata);
 959 }
 960
 961 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
 962 {
 963         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 964         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 965
 966         trace_api_chswitch_done(sdata, success);
 967         if (!success) {
 968                 sdata_info(sdata,
 969                            "driver channel switch failed, disconnecting\n");
 970                 ieee80211_queue_work(&sdata->local->hw,
 971                                      &ifmgd->csa_connection_drop_work);
 972         } else {
 973                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
 974         }
 975 }
 976 EXPORT_SYMBOL(ieee80211_chswitch_done);
 977
 978 static void ieee80211_chswitch_timer(unsigned long data)
 979 {
 980         struct ieee80211_sub_if_data *sdata =
 981                 (struct ieee80211_sub_if_data *) data;
 982
 983         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
 984 }
 985
 986 static void
 987 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 988                                  u64 timestamp, struct ieee802_11_elems *elems,
 989                                  bool beacon)
 990 {
 991         struct ieee80211_local *local = sdata->local;
 992         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 993         struct cfg80211_bss *cbss = ifmgd->associated;
 994         struct ieee80211_bss *bss;
 995         struct ieee80211_chanctx *chanctx;
 996         enum ieee80211_band new_band;
 997         int new_freq;
 998         u8 new_chan_no;
 999         u8 count;
1000         u8 mode;
1001         struct ieee80211_channel *new_chan;
1002         struct cfg80211_chan_def new_chandef = {};
1003         struct cfg80211_chan_def new_vht_chandef = {};
1004         const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1005         const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1006         const struct ieee80211_ht_operation *ht_oper;
1007         int secondary_channel_offset = -1;
1008
1009         sdata_assert_lock(sdata);
1010
1011         if (!cbss)
1012                 return;
1013
1014         if (local->scanning)
1015                 return;
1016
1017         /* disregard subsequent announcements if we are already processing */
1018         if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1019                 return;
1020
1021         sec_chan_offs = elems->sec_chan_offs;
1022         wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
1023         ht_oper = elems->ht_operation;
1024
1025         if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1026                             IEEE80211_STA_DISABLE_40MHZ)) {
1027                 sec_chan_offs = NULL;
1028                 wide_bw_chansw_ie = NULL;
1029                 /* only used for bandwidth here */
1030                 ht_oper = NULL;
1031         }
1032
1033         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1034                 wide_bw_chansw_ie = NULL;
1035
1036         if (elems->ext_chansw_ie) {
1037                 if (!ieee80211_operating_class_to_band(
1038                                 elems->ext_chansw_ie->new_operating_class,
1039                                 &new_band)) {
1040                         sdata_info(sdata,
1041                                    "cannot understand ECSA IE operating class %d, disconnecting\n",
1042                                    elems->ext_chansw_ie->new_operating_class);
1043                         ieee80211_queue_work(&local->hw,
1044                                              &ifmgd->csa_connection_drop_work);
1045                 }
1046                 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1047                 count = elems->ext_chansw_ie->count;
1048                 mode = elems->ext_chansw_ie->mode;
1049         } else if (elems->ch_switch_ie) {
1050                 new_band = cbss->channel->band;
1051                 new_chan_no = elems->ch_switch_ie->new_ch_num;
1052                 count = elems->ch_switch_ie->count;
1053                 mode = elems->ch_switch_ie->mode;
1054         } else {
1055                 /* nothing here we understand */
1056                 return;
1057         }
1058
1059         bss = (void *)cbss->priv;
1060
1061         new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
1062         new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1063         if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
1064                 sdata_info(sdata,
1065                            "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1066                            ifmgd->associated->bssid, new_freq);
1067                 ieee80211_queue_work(&local->hw,
1068                                      &ifmgd->csa_connection_drop_work);
1069                 return;
1070         }
1071
1072         if (!beacon && sec_chan_offs) {
1073                 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
1074         } else if (beacon && ht_oper) {
1075                 secondary_channel_offset =
1076                         ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
1077         } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
1078                 /*
1079                  * If it's not a beacon, HT is enabled and the IE not present,
1080                  * it's 20 MHz, 802.11-2012 8.5.2.6:
1081                  *      This element [the Secondary Channel Offset Element] is
1082                  *      present when switching to a 40 MHz channel. It may be
1083                  *      present when switching to a 20 MHz channel (in which
1084                  *      case the secondary channel offset is set to SCN).
1085                  */
1086                 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1087         }
1088
1089         switch (secondary_channel_offset) {
1090         default:
1091                 /* secondary_channel_offset was present but is invalid */
1092         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1093                 cfg80211_chandef_create(&new_chandef, new_chan,
1094                                         NL80211_CHAN_HT20);
1095                 break;
1096         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1097                 cfg80211_chandef_create(&new_chandef, new_chan,
1098                                         NL80211_CHAN_HT40PLUS);
1099                 break;
1100         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1101                 cfg80211_chandef_create(&new_chandef, new_chan,
1102                                         NL80211_CHAN_HT40MINUS);
1103                 break;
1104         case -1:
1105                 cfg80211_chandef_create(&new_chandef, new_chan,
1106                                         NL80211_CHAN_NO_HT);
1107                 break;
1108         }
1109
1110         if (wide_bw_chansw_ie) {
1111                 new_vht_chandef.chan = new_chan;
1112                 new_vht_chandef.center_freq1 =
1113                         ieee80211_channel_to_frequency(
1114                                 wide_bw_chansw_ie->new_center_freq_seg0,
1115                                 new_band);
1116
1117                 switch (wide_bw_chansw_ie->new_channel_width) {
1118                 default:
1119                         /* hmmm, ignore VHT and use HT if present */
1120                 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1121                         new_vht_chandef.chan = NULL;
1122                         break;
1123                 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1124                         new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1125                         break;
1126                 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1127                         new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1128                         break;
1129                 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1130                         /* field is otherwise reserved */
1131                         new_vht_chandef.center_freq2 =
1132                                 ieee80211_channel_to_frequency(
1133                                         wide_bw_chansw_ie->new_center_freq_seg1,
1134                                         new_band);
1135                         new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1136                         break;
1137                 }
1138                 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1139                     new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1140                         chandef_downgrade(&new_vht_chandef);
1141                 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1142                     new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1143                         chandef_downgrade(&new_vht_chandef);
1144                 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1145                     new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1146                         chandef_downgrade(&new_vht_chandef);
1147         }
1148
1149         /* if VHT data is there validate & use it */
1150         if (new_vht_chandef.chan) {
1151                 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1152                                                  &new_chandef)) {
1153                         sdata_info(sdata,
1154                                    "AP %pM CSA has inconsistent channel data, disconnecting\n",
1155                                    ifmgd->associated->bssid);
1156                         ieee80211_queue_work(&local->hw,
1157                                              &ifmgd->csa_connection_drop_work);
1158                         return;
1159                 }
1160                 new_chandef = new_vht_chandef;
1161         }
1162
1163         if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1164                                      IEEE80211_CHAN_DISABLED)) {
1165                 sdata_info(sdata,
1166                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1167                            ifmgd->associated->bssid, new_freq,
1168                            new_chandef.width, new_chandef.center_freq1,
1169                            new_chandef.center_freq2);
1170                 ieee80211_queue_work(&local->hw,
1171                                      &ifmgd->csa_connection_drop_work);
1172                 return;
1173         }
1174
1175         ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1176
1177         if (local->use_chanctx) {
1178                 sdata_info(sdata,
1179                            "not handling channel switch with channel contexts\n");
1180                 ieee80211_queue_work(&local->hw,
1181                                      &ifmgd->csa_connection_drop_work);
1182                 return;
1183         }
1184
1185         mutex_lock(&local->chanctx_mtx);
1186         if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1187                 mutex_unlock(&local->chanctx_mtx);
1188                 return;
1189         }
1190         chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1191                                struct ieee80211_chanctx, conf);
1192         if (chanctx->refcount > 1) {
1193                 sdata_info(sdata,
1194                            "channel switch with multiple interfaces on the same channel, disconnecting\n");
1195                 ieee80211_queue_work(&local->hw,
1196                                      &ifmgd->csa_connection_drop_work);
1197                 mutex_unlock(&local->chanctx_mtx);
1198                 return;
1199         }
1200         mutex_unlock(&local->chanctx_mtx);
1201
1202         local->csa_chandef = new_chandef;
1203
1204         if (mode)
1205                 ieee80211_stop_queues_by_reason(&local->hw,
1206                                 IEEE80211_MAX_QUEUE_MAP,
1207                                 IEEE80211_QUEUE_STOP_REASON_CSA);
1208
1209         if (local->ops->channel_switch) {
1210                 /* use driver's channel switch callback */
1211                 struct ieee80211_channel_switch ch_switch = {
1212                         .timestamp = timestamp,
1213                         .block_tx = mode,
1214                         .chandef = new_chandef,
1215                         .count = count,
1216                 };
1217
1218                 drv_channel_switch(local, &ch_switch);
1219                 return;
1220         }
1221
1222         /* channel switch handled in software */
1223         if (count <= 1)
1224                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1225         else
1226                 mod_timer(&ifmgd->chswitch_timer,
1227                           TU_TO_EXP_TIME(count * cbss->beacon_interval));
1228 }
1229
1230 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1231                                        struct ieee80211_channel *channel,
1232                                        const u8 *country_ie, u8 country_ie_len,
1233                                        const u8 *pwr_constr_elem)
1234 {
1235         struct ieee80211_country_ie_triplet *triplet;
1236         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1237         int i, chan_pwr, chan_increment, new_ap_level;
1238         bool have_chan_pwr = false;
1239
1240         /* Invalid IE */
1241         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1242                 return 0;
1243
1244         triplet = (void *)(country_ie + 3);
1245         country_ie_len -= 3;
1246
1247         switch (channel->band) {
1248         default:
1249                 WARN_ON_ONCE(1);
1250                 /* fall through */
1251         case IEEE80211_BAND_2GHZ:
1252         case IEEE80211_BAND_60GHZ:
1253                 chan_increment = 1;
1254                 break;
1255         case IEEE80211_BAND_5GHZ:
1256                 chan_increment = 4;
1257                 break;
1258         }
1259
1260         /* find channel */
1261         while (country_ie_len >= 3) {
1262                 u8 first_channel = triplet->chans.first_channel;
1263
1264                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1265                         goto next;
1266
1267                 for (i = 0; i < triplet->chans.num_channels; i++) {
1268                         if (first_channel + i * chan_increment == chan) {
1269                                 have_chan_pwr = true;
1270                                 chan_pwr = triplet->chans.max_power;
1271                                 break;
1272                         }
1273                 }
1274                 if (have_chan_pwr)
1275                         break;
1276
1277  next:
1278                 triplet++;
1279                 country_ie_len -= 3;
1280         }
1281
1282         if (!have_chan_pwr)
1283                 return 0;
1284
1285         new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1286
1287         if (sdata->ap_power_level == new_ap_level)
1288                 return 0;
1289
1290         sdata_info(sdata,
1291                    "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1292                    new_ap_level, chan_pwr, *pwr_constr_elem,
1293                    sdata->u.mgd.bssid);
1294         sdata->ap_power_level = new_ap_level;
1295         if (__ieee80211_recalc_txpower(sdata))
1296                 return BSS_CHANGED_TXPOWER;
1297         return 0;
1298 }
1299
1300 /* powersave */
1301 static void ieee80211_enable_ps(struct ieee80211_local *local,
1302                                 struct ieee80211_sub_if_data *sdata)
1303 {
1304         struct ieee80211_conf *conf = &local->hw.conf;
1305
1306         /*
1307          * If we are scanning right now then the parameters will
1308          * take effect when scan finishes.
1309          */
1310         if (local->scanning)
1311                 return;
1312
1313         if (conf->dynamic_ps_timeout > 0 &&
1314             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1315                 mod_timer(&local->dynamic_ps_timer, jiffies +
1316                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1317         } else {
1318                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1319                         ieee80211_send_nullfunc(local, sdata, 1);
1320
1321                 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1322                     (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1323                         return;
1324
1325                 conf->flags |= IEEE80211_CONF_PS;
1326                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1327         }
1328 }
1329
1330 static void ieee80211_change_ps(struct ieee80211_local *local)
1331 {
1332         struct ieee80211_conf *conf = &local->hw.conf;
1333
1334         if (local->ps_sdata) {
1335                 ieee80211_enable_ps(local, local->ps_sdata);
1336         } else if (conf->flags & IEEE80211_CONF_PS) {
1337                 conf->flags &= ~IEEE80211_CONF_PS;
1338                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1339                 del_timer_sync(&local->dynamic_ps_timer);
1340                 cancel_work_sync(&local->dynamic_ps_enable_work);
1341         }
1342 }
1343
1344 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1345 {
1346         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1347         struct sta_info *sta = NULL;
1348         bool authorized = false;
1349
1350         if (!mgd->powersave)
1351                 return false;
1352
1353         if (mgd->broken_ap)
1354                 return false;
1355
1356         if (!mgd->associated)
1357                 return false;
1358
1359         if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1360                           IEEE80211_STA_CONNECTION_POLL))
1361                 return false;
1362
1363         if (!mgd->have_beacon)
1364                 return false;
1365
1366         rcu_read_lock();
1367         sta = sta_info_get(sdata, mgd->bssid);
1368         if (sta)
1369                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1370         rcu_read_unlock();
1371
1372         return authorized;
1373 }
1374
1375 /* need to hold RTNL or interface lock */
1376 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1377 {
1378         struct ieee80211_sub_if_data *sdata, *found = NULL;
1379         int count = 0;
1380         int timeout;
1381
1382         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1383                 local->ps_sdata = NULL;
1384                 return;
1385         }
1386
1387         list_for_each_entry(sdata, &local->interfaces, list) {
1388                 if (!ieee80211_sdata_running(sdata))
1389                         continue;
1390                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1391                         /* If an AP vif is found, then disable PS
1392                          * by setting the count to zero thereby setting
1393                          * ps_sdata to NULL.
1394                          */
1395                         count = 0;
1396                         break;
1397                 }
1398                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1399                         continue;
1400                 found = sdata;
1401                 count++;
1402         }
1403
1404         if (count == 1 && ieee80211_powersave_allowed(found)) {
1405                 s32 beaconint_us;
1406
1407                 if (latency < 0)
1408                         latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1409
1410                 beaconint_us = ieee80211_tu_to_usec(
1411                                         found->vif.bss_conf.beacon_int);
1412
1413                 timeout = local->dynamic_ps_forced_timeout;
1414                 if (timeout < 0) {
1415                         /*
1416                          * Go to full PSM if the user configures a very low
1417                          * latency requirement.
1418                          * The 2000 second value is there for compatibility
1419                          * until the PM_QOS_NETWORK_LATENCY is configured
1420                          * with real values.
1421                          */
1422                         if (latency > (1900 * USEC_PER_MSEC) &&
1423                             latency != (2000 * USEC_PER_SEC))
1424                                 timeout = 0;
1425                         else
1426                                 timeout = 100;
1427                 }
1428                 local->hw.conf.dynamic_ps_timeout = timeout;
1429
1430                 if (beaconint_us > latency) {
1431                         local->ps_sdata = NULL;
1432                 } else {
1433                         int maxslp = 1;
1434                         u8 dtimper = found->u.mgd.dtim_period;
1435
1436                         /* If the TIM IE is invalid, pretend the value is 1 */
1437                         if (!dtimper)
1438                                 dtimper = 1;
1439                         else if (dtimper > 1)
1440                                 maxslp = min_t(int, dtimper,
1441                                                     latency / beaconint_us);
1442
1443                         local->hw.conf.max_sleep_period = maxslp;
1444                         local->hw.conf.ps_dtim_period = dtimper;
1445                         local->ps_sdata = found;
1446                 }
1447         } else {
1448                 local->ps_sdata = NULL;
1449         }
1450
1451         ieee80211_change_ps(local);
1452 }
1453
1454 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1455 {
1456         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1457
1458         if (sdata->vif.bss_conf.ps != ps_allowed) {
1459                 sdata->vif.bss_conf.ps = ps_allowed;
1460                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1461         }
1462 }
1463
1464 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1465 {
1466         struct ieee80211_local *local =
1467                 container_of(work, struct ieee80211_local,
1468                              dynamic_ps_disable_work);
1469
1470         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1471                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1472                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1473         }
1474
1475         ieee80211_wake_queues_by_reason(&local->hw,
1476                                         IEEE80211_MAX_QUEUE_MAP,
1477                                         IEEE80211_QUEUE_STOP_REASON_PS);
1478 }
1479
1480 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1481 {
1482         struct ieee80211_local *local =
1483                 container_of(work, struct ieee80211_local,
1484                              dynamic_ps_enable_work);
1485         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1486         struct ieee80211_if_managed *ifmgd;
1487         unsigned long flags;
1488         int q;
1489
1490         /* can only happen when PS was just disabled anyway */
1491         if (!sdata)
1492                 return;
1493
1494         ifmgd = &sdata->u.mgd;
1495
1496         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1497                 return;
1498
1499         if (local->hw.conf.dynamic_ps_timeout > 0) {
1500                 /* don't enter PS if TX frames are pending */
1501                 if (drv_tx_frames_pending(local)) {
1502                         mod_timer(&local->dynamic_ps_timer, jiffies +
1503                                   msecs_to_jiffies(
1504                                   local->hw.conf.dynamic_ps_timeout));
1505                         return;
1506                 }
1507
1508                 /*
1509                  * transmission can be stopped by others which leads to
1510                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1511                  * is not the actual idle state.
1512                  */
1513                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1514                 for (q = 0; q < local->hw.queues; q++) {
1515                         if (local->queue_stop_reasons[q]) {
1516                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1517                                                        flags);
1518                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1519                                           msecs_to_jiffies(
1520                                           local->hw.conf.dynamic_ps_timeout));
1521                                 return;
1522                         }
1523                 }
1524                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1525         }
1526
1527         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1528             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1529                 if (drv_tx_frames_pending(local)) {
1530                         mod_timer(&local->dynamic_ps_timer, jiffies +
1531                                   msecs_to_jiffies(
1532                                   local->hw.conf.dynamic_ps_timeout));
1533                 } else {
1534                         ieee80211_send_nullfunc(local, sdata, 1);
1535                         /* Flush to get the tx status of nullfunc frame */
1536                         ieee80211_flush_queues(local, sdata);
1537                 }
1538         }
1539
1540         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1541               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1542             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1543                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1544                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1545                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1546         }
1547 }
1548
1549 void ieee80211_dynamic_ps_timer(unsigned long data)
1550 {
1551         struct ieee80211_local *local = (void *) data;
1552
1553         if (local->quiescing || local->suspended)
1554                 return;
1555
1556         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1557 }
1558
1559 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1560 {
1561         struct delayed_work *delayed_work =
1562                 container_of(work, struct delayed_work, work);
1563         struct ieee80211_sub_if_data *sdata =
1564                 container_of(delayed_work, struct ieee80211_sub_if_data,
1565                              dfs_cac_timer_work);
1566
1567         ieee80211_vif_release_channel(sdata);
1568
1569         cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1570 }
1571
1572 /* MLME */
1573 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1574                                      struct ieee80211_sub_if_data *sdata,
1575                                      const u8 *wmm_param, size_t wmm_param_len)
1576 {
1577         struct ieee80211_tx_queue_params params;
1578         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1579         size_t left;
1580         int count;
1581         const u8 *pos;
1582         u8 uapsd_queues = 0;
1583
1584         if (!local->ops->conf_tx)
1585                 return false;
1586
1587         if (local->hw.queues < IEEE80211_NUM_ACS)
1588                 return false;
1589
1590         if (!wmm_param)
1591                 return false;
1592
1593         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1594                 return false;
1595
1596         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1597                 uapsd_queues = ifmgd->uapsd_queues;
1598
1599         count = wmm_param[6] & 0x0f;
1600         if (count == ifmgd->wmm_last_param_set)
1601                 return false;
1602         ifmgd->wmm_last_param_set = count;
1603
1604         pos = wmm_param + 8;
1605         left = wmm_param_len - 8;
1606
1607         memset(&params, 0, sizeof(params));
1608
1609         sdata->wmm_acm = 0;
1610         for (; left >= 4; left -= 4, pos += 4) {
1611                 int aci = (pos[0] >> 5) & 0x03;
1612                 int acm = (pos[0] >> 4) & 0x01;
1613                 bool uapsd = false;
1614                 int queue;
1615
1616                 switch (aci) {
1617                 case 1: /* AC_BK */
1618                         queue = 3;
1619                         if (acm)
1620                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1621                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1622                                 uapsd = true;
1623                         break;
1624                 case 2: /* AC_VI */
1625                         queue = 1;
1626                         if (acm)
1627                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1628                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1629                                 uapsd = true;
1630                         break;
1631                 case 3: /* AC_VO */
1632                         queue = 0;
1633                         if (acm)
1634                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1635                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1636                                 uapsd = true;
1637                         break;
1638                 case 0: /* AC_BE */
1639                 default:
1640                         queue = 2;
1641                         if (acm)
1642                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1643                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1644                                 uapsd = true;
1645                         break;
1646                 }
1647
1648                 params.aifs = pos[0] & 0x0f;
1649                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1650                 params.cw_min = ecw2cw(pos[1] & 0x0f);
1651                 params.txop = get_unaligned_le16(pos + 2);
1652                 params.acm = acm;
1653                 params.uapsd = uapsd;
1654
1655                 mlme_dbg(sdata,
1656                          "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1657                          queue, aci, acm,
1658                          params.aifs, params.cw_min, params.cw_max,
1659                          params.txop, params.uapsd);
1660                 sdata->tx_conf[queue] = params;
1661                 if (drv_conf_tx(local, sdata, queue, &params))
1662                         sdata_err(sdata,
1663                                   "failed to set TX queue parameters for queue %d\n",
1664                                   queue);
1665         }
1666
1667         /* enable WMM or activate new settings */
1668         sdata->vif.bss_conf.qos = true;
1669         return true;
1670 }
1671
1672 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1673 {
1674         lockdep_assert_held(&sdata->local->mtx);
1675
1676         sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1677                                 IEEE80211_STA_BEACON_POLL);
1678         ieee80211_run_deferred_scan(sdata->local);
1679 }
1680
1681 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1682 {
1683         mutex_lock(&sdata->local->mtx);
1684         __ieee80211_stop_poll(sdata);
1685         mutex_unlock(&sdata->local->mtx);
1686 }
1687
1688 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1689                                            u16 capab, bool erp_valid, u8 erp)
1690 {
1691         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1692         u32 changed = 0;
1693         bool use_protection;
1694         bool use_short_preamble;
1695         bool use_short_slot;
1696
1697         if (erp_valid) {
1698                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1699                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1700         } else {
1701                 use_protection = false;
1702                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1703         }
1704
1705         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1706         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1707                 use_short_slot = true;
1708
1709         if (use_protection != bss_conf->use_cts_prot) {
1710                 bss_conf->use_cts_prot = use_protection;
1711                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1712         }
1713
1714         if (use_short_preamble != bss_conf->use_short_preamble) {
1715                 bss_conf->use_short_preamble = use_short_preamble;
1716                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1717         }
1718
1719         if (use_short_slot != bss_conf->use_short_slot) {
1720                 bss_conf->use_short_slot = use_short_slot;
1721                 changed |= BSS_CHANGED_ERP_SLOT;
1722         }
1723
1724         return changed;
1725 }
1726
1727 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1728                                      struct cfg80211_bss *cbss,
1729                                      u32 bss_info_changed)
1730 {
1731         struct ieee80211_bss *bss = (void *)cbss->priv;
1732         struct ieee80211_local *local = sdata->local;
1733         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1734
1735         bss_info_changed |= BSS_CHANGED_ASSOC;
1736         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1737                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1738
1739         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1740                 beacon_loss_count * bss_conf->beacon_int));
1741
1742         sdata->u.mgd.associated = cbss;
1743         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1744
1745         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1746
1747         if (sdata->vif.p2p) {
1748                 const struct cfg80211_bss_ies *ies;
1749
1750                 rcu_read_lock();
1751                 ies = rcu_dereference(cbss->ies);
1752                 if (ies) {
1753                         int ret;
1754
1755                         ret = cfg80211_get_p2p_attr(
1756                                         ies->data, ies->len,
1757                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1758                                         (u8 *) &bss_conf->p2p_noa_attr,
1759                                         sizeof(bss_conf->p2p_noa_attr));
1760                         if (ret >= 2) {
1761                                 sdata->u.mgd.p2p_noa_index =
1762                                         bss_conf->p2p_noa_attr.index;
1763                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1764                         }
1765                 }
1766                 rcu_read_unlock();
1767         }
1768
1769         /* just to be sure */
1770         ieee80211_stop_poll(sdata);
1771
1772         ieee80211_led_assoc(local, 1);
1773
1774         if (sdata->u.mgd.have_beacon) {
1775                 /*
1776                  * If the AP is buggy we may get here with no DTIM period
1777                  * known, so assume it's 1 which is the only safe assumption
1778                  * in that case, although if the TIM IE is broken powersave
1779                  * probably just won't work at all.
1780                  */
1781                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1782                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1783         } else {
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         ifmgd->have_beacon = false;
1907
1908         ifmgd->flags = 0;
1909         ieee80211_vif_release_channel(sdata);
1910 }
1911
1912 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1913                              struct ieee80211_hdr *hdr)
1914 {
1915         /*
1916          * We can postpone the mgd.timer whenever receiving unicast frames
1917          * from AP because we know that the connection is working both ways
1918          * at that time. But multicast frames (and hence also beacons) must
1919          * be ignored here, because we need to trigger the timer during
1920          * data idle periods for sending the periodic probe request to the
1921          * AP we're connected to.
1922          */
1923         if (is_multicast_ether_addr(hdr->addr1))
1924                 return;
1925
1926         ieee80211_sta_reset_conn_monitor(sdata);
1927 }
1928
1929 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1930 {
1931         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1932         struct ieee80211_local *local = sdata->local;
1933
1934         mutex_lock(&local->mtx);
1935         if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1936                               IEEE80211_STA_CONNECTION_POLL))) {
1937                 mutex_unlock(&local->mtx);
1938                 return;
1939         }
1940
1941         __ieee80211_stop_poll(sdata);
1942
1943         mutex_lock(&local->iflist_mtx);
1944         ieee80211_recalc_ps(local, -1);
1945         mutex_unlock(&local->iflist_mtx);
1946
1947         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1948                 goto out;
1949
1950         /*
1951          * We've received a probe response, but are not sure whether
1952          * we have or will be receiving any beacons or data, so let's
1953          * schedule the timers again, just in case.
1954          */
1955         ieee80211_sta_reset_beacon_monitor(sdata);
1956
1957         mod_timer(&ifmgd->conn_mon_timer,
1958                   round_jiffies_up(jiffies +
1959                                    IEEE80211_CONNECTION_IDLE_TIME));
1960 out:
1961         mutex_unlock(&local->mtx);
1962 }
1963
1964 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1965                              struct ieee80211_hdr *hdr, bool ack)
1966 {
1967         if (!ieee80211_is_data(hdr->frame_control))
1968             return;
1969
1970         if (ieee80211_is_nullfunc(hdr->frame_control) &&
1971             sdata->u.mgd.probe_send_count > 0) {
1972                 if (ack)
1973                         ieee80211_sta_reset_conn_monitor(sdata);
1974                 else
1975                         sdata->u.mgd.nullfunc_failed = true;
1976                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1977                 return;
1978         }
1979
1980         if (ack)
1981                 ieee80211_sta_reset_conn_monitor(sdata);
1982 }
1983
1984 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1985 {
1986         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1987         const u8 *ssid;
1988         u8 *dst = ifmgd->associated->bssid;
1989         u8 unicast_limit = max(1, max_probe_tries - 3);
1990
1991         /*
1992          * Try sending broadcast probe requests for the last three
1993          * probe requests after the first ones failed since some
1994          * buggy APs only support broadcast probe requests.
1995          */
1996         if (ifmgd->probe_send_count >= unicast_limit)
1997                 dst = NULL;
1998
1999         /*
2000          * When the hardware reports an accurate Tx ACK status, it's
2001          * better to send a nullfunc frame instead of a probe request,
2002          * as it will kick us off the AP quickly if we aren't associated
2003          * anymore. The timeout will be reset if the frame is ACKed by
2004          * the AP.
2005          */
2006         ifmgd->probe_send_count++;
2007
2008         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2009                 ifmgd->nullfunc_failed = false;
2010                 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2011         } else {
2012                 int ssid_len;
2013
2014                 rcu_read_lock();
2015                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2016                 if (WARN_ON_ONCE(ssid == NULL))
2017                         ssid_len = 0;
2018                 else
2019                         ssid_len = ssid[1];
2020
2021                 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2022                                          0, (u32) -1, true, 0,
2023                                          ifmgd->associated->channel, false);
2024                 rcu_read_unlock();
2025         }
2026
2027         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2028         run_again(sdata, ifmgd->probe_timeout);
2029         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2030                 ieee80211_flush_queues(sdata->local, sdata);
2031 }
2032
2033 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2034                                    bool beacon)
2035 {
2036         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2037         bool already = false;
2038
2039         if (!ieee80211_sdata_running(sdata))
2040                 return;
2041
2042         sdata_lock(sdata);
2043
2044         if (!ifmgd->associated)
2045                 goto out;
2046
2047         mutex_lock(&sdata->local->mtx);
2048
2049         if (sdata->local->tmp_channel || sdata->local->scanning) {
2050                 mutex_unlock(&sdata->local->mtx);
2051                 goto out;
2052         }
2053
2054         if (beacon) {
2055                 mlme_dbg_ratelimited(sdata,
2056                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2057                                      beacon_loss_count);
2058
2059                 ieee80211_cqm_rssi_notify(&sdata->vif,
2060                                           NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2061                                           GFP_KERNEL);
2062         }
2063
2064         /*
2065          * The driver/our work has already reported this event or the
2066          * connection monitoring has kicked in and we have already sent
2067          * a probe request. Or maybe the AP died and the driver keeps
2068          * reporting until we disassociate...
2069          *
2070          * In either case we have to ignore the current call to this
2071          * function (except for setting the correct probe reason bit)
2072          * because otherwise we would reset the timer every time and
2073          * never check whether we received a probe response!
2074          */
2075         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2076                             IEEE80211_STA_CONNECTION_POLL))
2077                 already = true;
2078
2079         if (beacon)
2080                 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2081         else
2082                 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2083
2084         mutex_unlock(&sdata->local->mtx);
2085
2086         if (already)
2087                 goto out;
2088
2089         mutex_lock(&sdata->local->iflist_mtx);
2090         ieee80211_recalc_ps(sdata->local, -1);
2091         mutex_unlock(&sdata->local->iflist_mtx);
2092
2093         ifmgd->probe_send_count = 0;
2094         ieee80211_mgd_probe_ap_send(sdata);
2095  out:
2096         sdata_unlock(sdata);
2097 }
2098
2099 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2100                                           struct ieee80211_vif *vif)
2101 {
2102         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2103         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2104         struct cfg80211_bss *cbss;
2105         struct sk_buff *skb;
2106         const u8 *ssid;
2107         int ssid_len;
2108
2109         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2110                 return NULL;
2111
2112         sdata_assert_lock(sdata);
2113
2114         if (ifmgd->associated)
2115                 cbss = ifmgd->associated;
2116         else if (ifmgd->auth_data)
2117                 cbss = ifmgd->auth_data->bss;
2118         else if (ifmgd->assoc_data)
2119                 cbss = ifmgd->assoc_data->bss;
2120         else
2121                 return NULL;
2122
2123         rcu_read_lock();
2124         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2125         if (WARN_ON_ONCE(ssid == NULL))
2126                 ssid_len = 0;
2127         else
2128                 ssid_len = ssid[1];
2129
2130         skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2131                                         (u32) -1, cbss->channel,
2132                                         ssid + 2, ssid_len,
2133                                         NULL, 0, true);
2134         rcu_read_unlock();
2135
2136         return skb;
2137 }
2138 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2139
2140 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2141 {
2142         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2143         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2144
2145         sdata_lock(sdata);
2146         if (!ifmgd->associated) {
2147                 sdata_unlock(sdata);
2148                 return;
2149         }
2150
2151         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2152                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2153                                true, frame_buf);
2154         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2155         ieee80211_wake_queues_by_reason(&sdata->local->hw,
2156                                         IEEE80211_MAX_QUEUE_MAP,
2157                                         IEEE80211_QUEUE_STOP_REASON_CSA);
2158
2159         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2160                               IEEE80211_DEAUTH_FRAME_LEN);
2161         sdata_unlock(sdata);
2162 }
2163
2164 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2165 {
2166         struct ieee80211_sub_if_data *sdata =
2167                 container_of(work, struct ieee80211_sub_if_data,
2168                              u.mgd.beacon_connection_loss_work);
2169         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2170         struct sta_info *sta;
2171
2172         if (ifmgd->associated) {
2173                 rcu_read_lock();
2174                 sta = sta_info_get(sdata, ifmgd->bssid);
2175                 if (sta)
2176                         sta->beacon_loss_count++;
2177                 rcu_read_unlock();
2178         }
2179
2180         if (ifmgd->connection_loss) {
2181                 sdata_info(sdata, "Connection to AP %pM lost\n",
2182                            ifmgd->bssid);
2183                 __ieee80211_disconnect(sdata);
2184         } else {
2185                 ieee80211_mgd_probe_ap(sdata, true);
2186         }
2187 }
2188
2189 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2190 {
2191         struct ieee80211_sub_if_data *sdata =
2192                 container_of(work, struct ieee80211_sub_if_data,
2193                              u.mgd.csa_connection_drop_work);
2194
2195         __ieee80211_disconnect(sdata);
2196 }
2197
2198 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2199 {
2200         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2201         struct ieee80211_hw *hw = &sdata->local->hw;
2202
2203         trace_api_beacon_loss(sdata);
2204
2205         sdata->u.mgd.connection_loss = false;
2206         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2207 }
2208 EXPORT_SYMBOL(ieee80211_beacon_loss);
2209
2210 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2211 {
2212         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2213         struct ieee80211_hw *hw = &sdata->local->hw;
2214
2215         trace_api_connection_loss(sdata);
2216
2217         sdata->u.mgd.connection_loss = true;
2218         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2219 }
2220 EXPORT_SYMBOL(ieee80211_connection_loss);
2221
2222
2223 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2224                                         bool assoc)
2225 {
2226         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2227
2228         sdata_assert_lock(sdata);
2229
2230         if (!assoc) {
2231                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2232
2233                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2234                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2235                 sdata->u.mgd.flags = 0;
2236                 ieee80211_vif_release_channel(sdata);
2237         }
2238
2239         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2240         kfree(auth_data);
2241         sdata->u.mgd.auth_data = NULL;
2242 }
2243
2244 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2245                                      struct ieee80211_mgmt *mgmt, size_t len)
2246 {
2247         struct ieee80211_local *local = sdata->local;
2248         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2249         u8 *pos;
2250         struct ieee802_11_elems elems;
2251         u32 tx_flags = 0;
2252
2253         pos = mgmt->u.auth.variable;
2254         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2255         if (!elems.challenge)
2256                 return;
2257         auth_data->expected_transaction = 4;
2258         drv_mgd_prepare_tx(sdata->local, sdata);
2259         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2260                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2261                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2262         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2263                             elems.challenge - 2, elems.challenge_len + 2,
2264                             auth_data->bss->bssid, auth_data->bss->bssid,
2265                             auth_data->key, auth_data->key_len,
2266                             auth_data->key_idx, tx_flags);
2267 }
2268
2269 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2270                                    struct ieee80211_mgmt *mgmt, size_t len)
2271 {
2272         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2273         u8 bssid[ETH_ALEN];
2274         u16 auth_alg, auth_transaction, status_code;
2275         struct sta_info *sta;
2276
2277         sdata_assert_lock(sdata);
2278
2279         if (len < 24 + 6)
2280                 return;
2281
2282         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2283                 return;
2284
2285         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2286
2287         if (!ether_addr_equal(bssid, mgmt->bssid))
2288                 return;
2289
2290         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2291         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2292         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2293
2294         if (auth_alg != ifmgd->auth_data->algorithm ||
2295             auth_transaction != ifmgd->auth_data->expected_transaction) {
2296                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2297                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2298                            auth_transaction,
2299                            ifmgd->auth_data->expected_transaction);
2300                 return;
2301         }
2302
2303         if (status_code != WLAN_STATUS_SUCCESS) {
2304                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2305                            mgmt->sa, status_code);
2306                 ieee80211_destroy_auth_data(sdata, false);
2307                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2308                 return;
2309         }
2310
2311         switch (ifmgd->auth_data->algorithm) {
2312         case WLAN_AUTH_OPEN:
2313         case WLAN_AUTH_LEAP:
2314         case WLAN_AUTH_FT:
2315         case WLAN_AUTH_SAE:
2316                 break;
2317         case WLAN_AUTH_SHARED_KEY:
2318                 if (ifmgd->auth_data->expected_transaction != 4) {
2319                         ieee80211_auth_challenge(sdata, mgmt, len);
2320                         /* need another frame */
2321                         return;
2322                 }
2323                 break;
2324         default:
2325                 WARN_ONCE(1, "invalid auth alg %d",
2326                           ifmgd->auth_data->algorithm);
2327                 return;
2328         }
2329
2330         sdata_info(sdata, "authenticated\n");
2331         ifmgd->auth_data->done = true;
2332         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2333         ifmgd->auth_data->timeout_started = true;
2334         run_again(sdata, ifmgd->auth_data->timeout);
2335
2336         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2337             ifmgd->auth_data->expected_transaction != 2) {
2338                 /*
2339                  * Report auth frame to user space for processing since another
2340                  * round of Authentication frames is still needed.
2341                  */
2342                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2343                 return;
2344         }
2345
2346         /* move station state to auth */
2347         mutex_lock(&sdata->local->sta_mtx);
2348         sta = sta_info_get(sdata, bssid);
2349         if (!sta) {
2350                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2351                 goto out_err;
2352         }
2353         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2354                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2355                 goto out_err;
2356         }
2357         mutex_unlock(&sdata->local->sta_mtx);
2358
2359         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2360         return;
2361  out_err:
2362         mutex_unlock(&sdata->local->sta_mtx);
2363         /* ignore frame -- wait for timeout */
2364 }
2365
2366
2367 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2368                                      struct ieee80211_mgmt *mgmt, size_t len)
2369 {
2370         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2371         const u8 *bssid = NULL;
2372         u16 reason_code;
2373
2374         sdata_assert_lock(sdata);
2375
2376         if (len < 24 + 2)
2377                 return;
2378
2379         if (!ifmgd->associated ||
2380             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2381                 return;
2382
2383         bssid = ifmgd->associated->bssid;
2384
2385         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2386
2387         sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2388                    bssid, reason_code);
2389
2390         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2391
2392         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2393 }
2394
2395
2396 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2397                                        struct ieee80211_mgmt *mgmt, size_t len)
2398 {
2399         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2400         u16 reason_code;
2401
2402         sdata_assert_lock(sdata);
2403
2404         if (len < 24 + 2)
2405                 return;
2406
2407         if (!ifmgd->associated ||
2408             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2409                 return;
2410
2411         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2412
2413         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2414                    mgmt->sa, reason_code);
2415
2416         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2417
2418         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2419 }
2420
2421 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2422                                 u8 *supp_rates, unsigned int supp_rates_len,
2423                                 u32 *rates, u32 *basic_rates,
2424                                 bool *have_higher_than_11mbit,
2425                                 int *min_rate, int *min_rate_index)
2426 {
2427         int i, j;
2428
2429         for (i = 0; i < supp_rates_len; i++) {
2430                 int rate = (supp_rates[i] & 0x7f) * 5;
2431                 bool is_basic = !!(supp_rates[i] & 0x80);
2432
2433                 if (rate > 110)
2434                         *have_higher_than_11mbit = true;
2435
2436                 /*
2437                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2438                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2439                  *
2440                  * Note: Even through the membership selector and the basic
2441                  *       rate flag share the same bit, they are not exactly
2442                  *       the same.
2443                  */
2444                 if (!!(supp_rates[i] & 0x80) &&
2445                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2446                         continue;
2447
2448                 for (j = 0; j < sband->n_bitrates; j++) {
2449                         if (sband->bitrates[j].bitrate == rate) {
2450                                 *rates |= BIT(j);
2451                                 if (is_basic)
2452                                         *basic_rates |= BIT(j);
2453                                 if (rate < *min_rate) {
2454                                         *min_rate = rate;
2455                                         *min_rate_index = j;
2456                                 }
2457                                 break;
2458                         }
2459                 }
2460         }
2461 }
2462
2463 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2464                                          bool assoc)
2465 {
2466         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2467
2468         sdata_assert_lock(sdata);
2469
2470         if (!assoc) {
2471                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2472
2473                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2474                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2475                 sdata->u.mgd.flags = 0;
2476                 ieee80211_vif_release_channel(sdata);
2477         }
2478
2479         kfree(assoc_data);
2480         sdata->u.mgd.assoc_data = NULL;
2481 }
2482
2483 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2484                                     struct cfg80211_bss *cbss,
2485                                     struct ieee80211_mgmt *mgmt, size_t len)
2486 {
2487         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2488         struct ieee80211_local *local = sdata->local;
2489         struct ieee80211_supported_band *sband;
2490         struct sta_info *sta;
2491         u8 *pos;
2492         u16 capab_info, aid;
2493         struct ieee802_11_elems elems;
2494         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2495         const struct cfg80211_bss_ies *bss_ies = NULL;
2496         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2497         u32 changed = 0;
2498         int err;
2499         bool ret;
2500
2501         /* AssocResp and ReassocResp have identical structure */
2502
2503         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2504         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2505
2506         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2507                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2508                            aid);
2509         aid &= ~(BIT(15) | BIT(14));
2510
2511         ifmgd->broken_ap = false;
2512
2513         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2514                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2515                            aid);
2516                 aid = 0;
2517                 ifmgd->broken_ap = true;
2518         }
2519
2520         pos = mgmt->u.assoc_resp.variable;
2521         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2522
2523         if (!elems.supp_rates) {
2524                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2525                 return false;
2526         }
2527
2528         ifmgd->aid = aid;
2529
2530         /*
2531          * Some APs are erroneously not including some information in their
2532          * (re)association response frames. Try to recover by using the data
2533          * from the beacon or probe response. This seems to afflict mobile
2534          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2535          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2536          */
2537         if ((assoc_data->wmm && !elems.wmm_param) ||
2538             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2539              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2540             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2541              (!elems.vht_cap_elem || !elems.vht_operation))) {
2542                 const struct cfg80211_bss_ies *ies;
2543                 struct ieee802_11_elems bss_elems;
2544
2545                 rcu_read_lock();
2546                 ies = rcu_dereference(cbss->ies);
2547                 if (ies)
2548                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2549                                           GFP_ATOMIC);
2550                 rcu_read_unlock();
2551                 if (!bss_ies)
2552                         return false;
2553
2554                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2555                                        false, &bss_elems);
2556                 if (assoc_data->wmm &&
2557                     !elems.wmm_param && bss_elems.wmm_param) {
2558                         elems.wmm_param = bss_elems.wmm_param;
2559                         sdata_info(sdata,
2560                                    "AP bug: WMM param missing from AssocResp\n");
2561                 }
2562
2563                 /*
2564                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2565                  * have to include the IEs in the (re)association response.
2566                  */
2567                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2568                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2569                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2570                         sdata_info(sdata,
2571                                    "AP bug: HT capability missing from AssocResp\n");
2572                 }
2573                 if (!elems.ht_operation && bss_elems.ht_operation &&
2574                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2575                         elems.ht_operation = bss_elems.ht_operation;
2576                         sdata_info(sdata,
2577                                    "AP bug: HT operation missing from AssocResp\n");
2578                 }
2579                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2580                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2581                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2582                         sdata_info(sdata,
2583                                    "AP bug: VHT capa missing from AssocResp\n");
2584                 }
2585                 if (!elems.vht_operation && bss_elems.vht_operation &&
2586                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2587                         elems.vht_operation = bss_elems.vht_operation;
2588                         sdata_info(sdata,
2589                                    "AP bug: VHT operation missing from AssocResp\n");
2590                 }
2591         }
2592
2593         /*
2594          * We previously checked these in the beacon/probe response, so
2595          * they should be present here. This is just a safety net.
2596          */
2597         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2598             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2599                 sdata_info(sdata,
2600                            "HT AP is missing WMM params or HT capability/operation\n");
2601                 ret = false;
2602                 goto out;
2603         }
2604
2605         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2606             (!elems.vht_cap_elem || !elems.vht_operation)) {
2607                 sdata_info(sdata,
2608                            "VHT AP is missing VHT capability/operation\n");
2609                 ret = false;
2610                 goto out;
2611         }
2612
2613         mutex_lock(&sdata->local->sta_mtx);
2614         /*
2615          * station info was already allocated and inserted before
2616          * the association and should be available to us
2617          */
2618         sta = sta_info_get(sdata, cbss->bssid);
2619         if (WARN_ON(!sta)) {
2620                 mutex_unlock(&sdata->local->sta_mtx);
2621                 ret = false;
2622                 goto out;
2623         }
2624
2625         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2626
2627         /* Set up internal HT/VHT capabilities */
2628         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2629                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2630                                                   elems.ht_cap_elem, sta);
2631
2632         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2633                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2634                                                     elems.vht_cap_elem, sta);
2635
2636         /*
2637          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2638          * in their association response, so ignore that data for our own
2639          * configuration. If it changed since the last beacon, we'll get the
2640          * next beacon and update then.
2641          */
2642
2643         /*
2644          * If an operating mode notification IE is present, override the
2645          * NSS calculation (that would be done in rate_control_rate_init())
2646          * and use the # of streams from that element.
2647          */
2648         if (elems.opmode_notif &&
2649             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2650                 u8 nss;
2651
2652                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2653                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2654                 nss += 1;
2655                 sta->sta.rx_nss = nss;
2656         }
2657
2658         rate_control_rate_init(sta);
2659
2660         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2661                 set_sta_flag(sta, WLAN_STA_MFP);
2662
2663         if (elems.wmm_param)
2664                 set_sta_flag(sta, WLAN_STA_WME);
2665
2666         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2667         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2668                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2669         if (err) {
2670                 sdata_info(sdata,
2671                            "failed to move station %pM to desired state\n",
2672                            sta->sta.addr);
2673                 WARN_ON(__sta_info_destroy(sta));
2674                 mutex_unlock(&sdata->local->sta_mtx);
2675                 ret = false;
2676                 goto out;
2677         }
2678
2679         mutex_unlock(&sdata->local->sta_mtx);
2680
2681         /*
2682          * Always handle WMM once after association regardless
2683          * of the first value the AP uses. Setting -1 here has
2684          * that effect because the AP values is an unsigned
2685          * 4-bit value.
2686          */
2687         ifmgd->wmm_last_param_set = -1;
2688
2689         if (elems.wmm_param)
2690                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2691                                          elems.wmm_param_len);
2692         else
2693                 ieee80211_set_wmm_default(sdata, false);
2694         changed |= BSS_CHANGED_QOS;
2695
2696         /* set AID and assoc capability,
2697          * ieee80211_set_associated() will tell the driver */
2698         bss_conf->aid = aid;
2699         bss_conf->assoc_capability = capab_info;
2700         ieee80211_set_associated(sdata, cbss, changed);
2701
2702         /*
2703          * If we're using 4-addr mode, let the AP know that we're
2704          * doing so, so that it can create the STA VLAN on its side
2705          */
2706         if (ifmgd->use_4addr)
2707                 ieee80211_send_4addr_nullfunc(local, sdata);
2708
2709         /*
2710          * Start timer to probe the connection to the AP now.
2711          * Also start the timer that will detect beacon loss.
2712          */
2713         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2714         ieee80211_sta_reset_beacon_monitor(sdata);
2715
2716         ret = true;
2717  out:
2718         kfree(bss_ies);
2719         return ret;
2720 }
2721
2722 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2723                                          struct ieee80211_mgmt *mgmt,
2724                                          size_t len)
2725 {
2726         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2727         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2728         u16 capab_info, status_code, aid;
2729         struct ieee802_11_elems elems;
2730         u8 *pos;
2731         bool reassoc;
2732         struct cfg80211_bss *bss;
2733
2734         sdata_assert_lock(sdata);
2735
2736         if (!assoc_data)
2737                 return;
2738         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2739                 return;
2740
2741         /*
2742          * AssocResp and ReassocResp have identical structure, so process both
2743          * of them in this function.
2744          */
2745
2746         if (len < 24 + 6)
2747                 return;
2748
2749         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2750         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2751         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2752         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2753
2754         sdata_info(sdata,
2755                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2756                    reassoc ? "Rea" : "A", mgmt->sa,
2757                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2758
2759         pos = mgmt->u.assoc_resp.variable;
2760         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2761
2762         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2763             elems.timeout_int &&
2764             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2765                 u32 tu, ms;
2766                 tu = le32_to_cpu(elems.timeout_int->value);
2767                 ms = tu * 1024 / 1000;
2768                 sdata_info(sdata,
2769                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2770                            mgmt->sa, tu, ms);
2771                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2772                 assoc_data->timeout_started = true;
2773                 if (ms > IEEE80211_ASSOC_TIMEOUT)
2774                         run_again(sdata, assoc_data->timeout);
2775                 return;
2776         }
2777
2778         bss = assoc_data->bss;
2779
2780         if (status_code != WLAN_STATUS_SUCCESS) {
2781                 sdata_info(sdata, "%pM denied association (code=%d)\n",
2782                            mgmt->sa, status_code);
2783                 ieee80211_destroy_assoc_data(sdata, false);
2784         } else {
2785                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2786                         /* oops -- internal error -- send timeout for now */
2787                         ieee80211_destroy_assoc_data(sdata, false);
2788                         cfg80211_put_bss(sdata->local->hw.wiphy, bss);
2789                         cfg80211_assoc_timeout(sdata->dev, mgmt->bssid);
2790                         return;
2791                 }
2792                 sdata_info(sdata, "associated\n");
2793
2794                 /*
2795                  * destroy assoc_data afterwards, as otherwise an idle
2796                  * recalc after assoc_data is NULL but before associated
2797                  * is set can cause the interface to go idle
2798                  */
2799                 ieee80211_destroy_assoc_data(sdata, true);
2800         }
2801
2802         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2803 }
2804
2805 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2806                                   struct ieee80211_mgmt *mgmt, size_t len,
2807                                   struct ieee80211_rx_status *rx_status,
2808                                   struct ieee802_11_elems *elems)
2809 {
2810         struct ieee80211_local *local = sdata->local;
2811         int freq;
2812         struct ieee80211_bss *bss;
2813         struct ieee80211_channel *channel;
2814
2815         sdata_assert_lock(sdata);
2816
2817         if (elems->ds_params)
2818                 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2819                                                       rx_status->band);
2820         else
2821                 freq = rx_status->freq;
2822
2823         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2824
2825         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2826                 return;
2827
2828         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2829                                         channel);
2830         if (bss)
2831                 ieee80211_rx_bss_put(local, bss);
2832
2833         if (!sdata->u.mgd.associated ||
2834             !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
2835                 return;
2836
2837         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2838                                          elems, true);
2839
2840 }
2841
2842
2843 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2844                                          struct sk_buff *skb)
2845 {
2846         struct ieee80211_mgmt *mgmt = (void *)skb->data;
2847         struct ieee80211_if_managed *ifmgd;
2848         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2849         size_t baselen, len = skb->len;
2850         struct ieee802_11_elems elems;
2851
2852         ifmgd = &sdata->u.mgd;
2853
2854         sdata_assert_lock(sdata);
2855
2856         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2857                 return; /* ignore ProbeResp to foreign address */
2858
2859         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2860         if (baselen > len)
2861                 return;
2862
2863         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2864                                false, &elems);
2865
2866         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2867
2868         if (ifmgd->associated &&
2869             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2870                 ieee80211_reset_ap_probe(sdata);
2871
2872         if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2873             ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2874                 /* got probe response, continue with auth */
2875                 sdata_info(sdata, "direct probe responded\n");
2876                 ifmgd->auth_data->tries = 0;
2877                 ifmgd->auth_data->timeout = jiffies;
2878                 ifmgd->auth_data->timeout_started = true;
2879                 run_again(sdata, ifmgd->auth_data->timeout);
2880         }
2881 }
2882
2883 /*
2884  * This is the canonical list of information elements we care about,
2885  * the filter code also gives us all changes to the Microsoft OUI
2886  * (00:50:F2) vendor IE which is used for WMM which we need to track.
2887  *
2888  * We implement beacon filtering in software since that means we can
2889  * avoid processing the frame here and in cfg80211, and userspace
2890  * will not be able to tell whether the hardware supports it or not.
2891  *
2892  * XXX: This list needs to be dynamic -- userspace needs to be able to
2893  *      add items it requires. It also needs to be able to tell us to
2894  *      look out for other vendor IEs.
2895  */
2896 static const u64 care_about_ies =
2897         (1ULL << WLAN_EID_COUNTRY) |
2898         (1ULL << WLAN_EID_ERP_INFO) |
2899         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2900         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2901         (1ULL << WLAN_EID_HT_CAPABILITY) |
2902         (1ULL << WLAN_EID_HT_OPERATION);
2903
2904 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2905                                      struct ieee80211_mgmt *mgmt, size_t len,
2906                                      struct ieee80211_rx_status *rx_status)
2907 {
2908         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2909         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2910         size_t baselen;
2911         struct ieee802_11_elems elems;
2912         struct ieee80211_local *local = sdata->local;
2913         struct ieee80211_chanctx_conf *chanctx_conf;
2914         struct ieee80211_channel *chan;
2915         struct sta_info *sta;
2916         u32 changed = 0;
2917         bool erp_valid;
2918         u8 erp_value = 0;
2919         u32 ncrc;
2920         u8 *bssid;
2921         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2922
2923         sdata_assert_lock(sdata);
2924
2925         /* Process beacon from the current BSS */
2926         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2927         if (baselen > len)
2928                 return;
2929
2930         rcu_read_lock();
2931         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2932         if (!chanctx_conf) {
2933                 rcu_read_unlock();
2934                 return;
2935         }
2936
2937         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2938                 rcu_read_unlock();
2939                 return;
2940         }
2941         chan = chanctx_conf->def.chan;
2942         rcu_read_unlock();
2943
2944         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2945             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2946                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2947                                        len - baselen, false, &elems);
2948
2949                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2950                 if (elems.tim && !elems.parse_error) {
2951                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
2952                         ifmgd->dtim_period = tim_ie->dtim_period;
2953                 }
2954                 ifmgd->have_beacon = true;
2955                 ifmgd->assoc_data->need_beacon = false;
2956                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2957                         sdata->vif.bss_conf.sync_tsf =
2958                                 le64_to_cpu(mgmt->u.beacon.timestamp);
2959                         sdata->vif.bss_conf.sync_device_ts =
2960                                 rx_status->device_timestamp;
2961                         if (elems.tim)
2962                                 sdata->vif.bss_conf.sync_dtim_count =
2963                                         elems.tim->dtim_count;
2964                         else
2965                                 sdata->vif.bss_conf.sync_dtim_count = 0;
2966                 }
2967                 /* continue assoc process */
2968                 ifmgd->assoc_data->timeout = jiffies;
2969                 ifmgd->assoc_data->timeout_started = true;
2970                 run_again(sdata, ifmgd->assoc_data->timeout);
2971                 return;
2972         }
2973
2974         if (!ifmgd->associated ||
2975             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2976                 return;
2977         bssid = ifmgd->associated->bssid;
2978
2979         /* Track average RSSI from the Beacon frames of the current AP */
2980         ifmgd->last_beacon_signal = rx_status->signal;
2981         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2982                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2983                 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2984                 ifmgd->last_cqm_event_signal = 0;
2985                 ifmgd->count_beacon_signal = 1;
2986                 ifmgd->last_ave_beacon_signal = 0;
2987         } else {
2988                 ifmgd->ave_beacon_signal =
2989                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2990                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2991                          ifmgd->ave_beacon_signal) / 16;
2992                 ifmgd->count_beacon_signal++;
2993         }
2994
2995         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2996             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2997                 int sig = ifmgd->ave_beacon_signal;
2998                 int last_sig = ifmgd->last_ave_beacon_signal;
2999
3000                 /*
3001                  * if signal crosses either of the boundaries, invoke callback
3002                  * with appropriate parameters
3003                  */
3004                 if (sig > ifmgd->rssi_max_thold &&
3005                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3006                         ifmgd->last_ave_beacon_signal = sig;
3007                         drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3008                 } else if (sig < ifmgd->rssi_min_thold &&
3009                            (last_sig >= ifmgd->rssi_max_thold ||
3010                            last_sig == 0)) {
3011                         ifmgd->last_ave_beacon_signal = sig;
3012                         drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3013                 }
3014         }
3015
3016         if (bss_conf->cqm_rssi_thold &&
3017             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3018             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3019                 int sig = ifmgd->ave_beacon_signal / 16;
3020                 int last_event = ifmgd->last_cqm_event_signal;
3021                 int thold = bss_conf->cqm_rssi_thold;
3022                 int hyst = bss_conf->cqm_rssi_hyst;
3023                 if (sig < thold &&
3024                     (last_event == 0 || sig < last_event - hyst)) {
3025                         ifmgd->last_cqm_event_signal = sig;
3026                         ieee80211_cqm_rssi_notify(
3027                                 &sdata->vif,
3028                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3029                                 GFP_KERNEL);
3030                 } else if (sig > thold &&
3031                            (last_event == 0 || sig > last_event + hyst)) {
3032                         ifmgd->last_cqm_event_signal = sig;
3033                         ieee80211_cqm_rssi_notify(
3034                                 &sdata->vif,
3035                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3036                                 GFP_KERNEL);
3037                 }
3038         }
3039
3040         if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
3041                 mlme_dbg_ratelimited(sdata,
3042                                      "cancelling AP probe due to a received beacon\n");
3043                 mutex_lock(&local->mtx);
3044                 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
3045                 ieee80211_run_deferred_scan(local);
3046                 mutex_unlock(&local->mtx);
3047
3048                 mutex_lock(&local->iflist_mtx);
3049                 ieee80211_recalc_ps(local, -1);
3050                 mutex_unlock(&local->iflist_mtx);
3051         }
3052
3053         /*
3054          * Push the beacon loss detection into the future since
3055          * we are processing a beacon from the AP just now.
3056          */
3057         ieee80211_sta_reset_beacon_monitor(sdata);
3058
3059         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3060         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3061                                           len - baselen, false, &elems,
3062                                           care_about_ies, ncrc);
3063
3064         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3065                 bool directed_tim = ieee80211_check_tim(elems.tim,
3066                                                         elems.tim_len,
3067                                                         ifmgd->aid);
3068                 if (directed_tim) {
3069                         if (local->hw.conf.dynamic_ps_timeout > 0) {
3070                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3071                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3072                                         ieee80211_hw_config(local,
3073                                                             IEEE80211_CONF_CHANGE_PS);
3074                                 }
3075                                 ieee80211_send_nullfunc(local, sdata, 0);
3076                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
3077                                 local->pspolling = true;
3078
3079                                 /*
3080                                  * Here is assumed that the driver will be
3081                                  * able to send ps-poll frame and receive a
3082                                  * response even though power save mode is
3083                                  * enabled, but some drivers might require
3084                                  * to disable power save here. This needs
3085                                  * to be investigated.
3086                                  */
3087                                 ieee80211_send_pspoll(local, sdata);
3088                         }
3089                 }
3090         }
3091
3092         if (sdata->vif.p2p) {
3093                 struct ieee80211_p2p_noa_attr noa = {};
3094                 int ret;
3095
3096                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3097                                             len - baselen,
3098                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3099                                             (u8 *) &noa, sizeof(noa));
3100                 if (ret >= 2) {
3101                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3102                                 /* valid noa_attr and index changed */
3103                                 sdata->u.mgd.p2p_noa_index = noa.index;
3104                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3105                                 changed |= BSS_CHANGED_P2P_PS;
3106                                 /*
3107                                  * make sure we update all information, the CRC
3108                                  * mechanism doesn't look at P2P attributes.
3109                                  */
3110                                 ifmgd->beacon_crc_valid = false;
3111                         }
3112                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3113                         /* noa_attr not found and we had valid noa_attr before */
3114                         sdata->u.mgd.p2p_noa_index = -1;
3115                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3116                         changed |= BSS_CHANGED_P2P_PS;
3117                         ifmgd->beacon_crc_valid = false;
3118                 }
3119         }
3120
3121         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3122                 return;
3123         ifmgd->beacon_crc = ncrc;
3124         ifmgd->beacon_crc_valid = true;
3125
3126         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3127
3128         if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3129                                      elems.wmm_param_len))
3130                 changed |= BSS_CHANGED_QOS;
3131
3132         /*
3133          * If we haven't had a beacon before, tell the driver about the
3134          * DTIM period (and beacon timing if desired) now.
3135          */
3136         if (!ifmgd->have_beacon) {
3137                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3138                 if (elems.tim)
3139                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3140                 else
3141                         bss_conf->dtim_period = 1;
3142
3143                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3144                         sdata->vif.bss_conf.sync_tsf =
3145                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3146                         sdata->vif.bss_conf.sync_device_ts =
3147                                 rx_status->device_timestamp;
3148                         if (elems.tim)
3149                                 sdata->vif.bss_conf.sync_dtim_count =
3150                                         elems.tim->dtim_count;
3151                         else
3152                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3153                 }
3154
3155                 changed |= BSS_CHANGED_BEACON_INFO;
3156                 ifmgd->have_beacon = true;
3157
3158                 mutex_lock(&local->iflist_mtx);
3159                 ieee80211_recalc_ps(local, -1);
3160                 mutex_unlock(&local->iflist_mtx);
3161
3162                 ieee80211_recalc_ps_vif(sdata);
3163         }
3164
3165         if (elems.erp_info) {
3166                 erp_valid = true;
3167                 erp_value = elems.erp_info[0];
3168         } else {
3169                 erp_valid = false;
3170         }
3171         changed |= ieee80211_handle_bss_capability(sdata,
3172                         le16_to_cpu(mgmt->u.beacon.capab_info),
3173                         erp_valid, erp_value);
3174
3175         mutex_lock(&local->sta_mtx);
3176         sta = sta_info_get(sdata, bssid);
3177
3178         if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3179                                 elems.vht_operation, bssid, &changed)) {
3180                 mutex_unlock(&local->sta_mtx);
3181                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3182                                        WLAN_REASON_DEAUTH_LEAVING,
3183                                        true, deauth_buf);
3184                 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3185                                       sizeof(deauth_buf));
3186                 return;
3187         }
3188
3189         if (sta && elems.opmode_notif)
3190                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3191                                             rx_status->band, true);
3192         mutex_unlock(&local->sta_mtx);
3193
3194         if (elems.country_elem && elems.pwr_constr_elem &&
3195             mgmt->u.probe_resp.capab_info &
3196                                 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3197                 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3198                                                        elems.country_elem,
3199                                                        elems.country_elem_len,
3200                                                        elems.pwr_constr_elem);
3201
3202         ieee80211_bss_info_change_notify(sdata, changed);
3203 }
3204
3205 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3206                                   struct sk_buff *skb)
3207 {
3208         struct ieee80211_rx_status *rx_status;
3209         struct ieee80211_mgmt *mgmt;
3210         u16 fc;
3211         struct ieee802_11_elems elems;
3212         int ies_len;
3213
3214         rx_status = (struct ieee80211_rx_status *) skb->cb;
3215         mgmt = (struct ieee80211_mgmt *) skb->data;
3216         fc = le16_to_cpu(mgmt->frame_control);
3217
3218         sdata_lock(sdata);
3219
3220         switch (fc & IEEE80211_FCTL_STYPE) {
3221         case IEEE80211_STYPE_BEACON:
3222                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3223                 break;
3224         case IEEE80211_STYPE_PROBE_RESP:
3225                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3226                 break;
3227         case IEEE80211_STYPE_AUTH:
3228                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3229                 break;
3230         case IEEE80211_STYPE_DEAUTH:
3231                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3232                 break;
3233         case IEEE80211_STYPE_DISASSOC:
3234                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3235                 break;
3236         case IEEE80211_STYPE_ASSOC_RESP:
3237         case IEEE80211_STYPE_REASSOC_RESP:
3238                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3239                 break;
3240         case IEEE80211_STYPE_ACTION:
3241                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3242                         ies_len = skb->len -
3243                                   offsetof(struct ieee80211_mgmt,
3244                                            u.action.u.chan_switch.variable);
3245
3246                         if (ies_len < 0)
3247                                 break;
3248
3249                         ieee802_11_parse_elems(
3250                                 mgmt->u.action.u.chan_switch.variable,
3251                                 ies_len, true, &elems);
3252
3253                         if (elems.parse_error)
3254                                 break;
3255
3256                         ieee80211_sta_process_chanswitch(sdata,
3257                                                          rx_status->mactime,
3258                                                          &elems, false);
3259                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3260                         ies_len = skb->len -
3261                                   offsetof(struct ieee80211_mgmt,
3262                                            u.action.u.ext_chan_switch.variable);
3263
3264                         if (ies_len < 0)
3265                                 break;
3266
3267                         ieee802_11_parse_elems(
3268                                 mgmt->u.action.u.ext_chan_switch.variable,
3269                                 ies_len, true, &elems);
3270
3271                         if (elems.parse_error)
3272                                 break;
3273
3274                         /* for the handling code pretend this was also an IE */
3275                         elems.ext_chansw_ie =
3276                                 &mgmt->u.action.u.ext_chan_switch.data;
3277
3278                         ieee80211_sta_process_chanswitch(sdata,
3279                                                          rx_status->mactime,
3280                                                          &elems, false);
3281                 }
3282                 break;
3283         }
3284         sdata_unlock(sdata);
3285 }
3286
3287 static void ieee80211_sta_timer(unsigned long data)
3288 {
3289         struct ieee80211_sub_if_data *sdata =
3290                 (struct ieee80211_sub_if_data *) data;
3291
3292         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3293 }
3294
3295 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3296                                           u8 *bssid, u8 reason, bool tx)
3297 {
3298         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3299
3300         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3301                                tx, frame_buf);
3302
3303         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3304                               IEEE80211_DEAUTH_FRAME_LEN);
3305 }
3306
3307 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3308 {
3309         struct ieee80211_local *local = sdata->local;
3310         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3311         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3312         u32 tx_flags = 0;
3313
3314         sdata_assert_lock(sdata);
3315
3316         if (WARN_ON_ONCE(!auth_data))
3317                 return -EINVAL;
3318
3319         auth_data->tries++;
3320
3321         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3322                 sdata_info(sdata, "authentication with %pM timed out\n",
3323                            auth_data->bss->bssid);
3324
3325                 /*
3326                  * Most likely AP is not in the range so remove the
3327                  * bss struct for that AP.
3328                  */
3329                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3330
3331                 return -ETIMEDOUT;
3332         }
3333
3334         drv_mgd_prepare_tx(local, sdata);
3335
3336         if (auth_data->bss->proberesp_ies) {
3337                 u16 trans = 1;
3338                 u16 status = 0;
3339
3340                 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3341                            auth_data->bss->bssid, auth_data->tries,
3342                            IEEE80211_AUTH_MAX_TRIES);
3343
3344                 auth_data->expected_transaction = 2;
3345
3346                 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3347                         trans = auth_data->sae_trans;
3348                         status = auth_data->sae_status;
3349                         auth_data->expected_transaction = trans;
3350                 }
3351
3352                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3353                         tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3354                                    IEEE80211_TX_INTFL_MLME_CONN_TX;
3355
3356                 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3357                                     auth_data->data, auth_data->data_len,
3358                                     auth_data->bss->bssid,
3359                                     auth_data->bss->bssid, NULL, 0, 0,
3360                                     tx_flags);
3361         } else {
3362                 const u8 *ssidie;
3363
3364                 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3365                            auth_data->bss->bssid, auth_data->tries,
3366                            IEEE80211_AUTH_MAX_TRIES);
3367
3368                 rcu_read_lock();
3369                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3370                 if (!ssidie) {
3371                         rcu_read_unlock();
3372                         return -EINVAL;
3373                 }
3374                 /*
3375                  * Direct probe is sent to broadcast address as some APs
3376                  * will not answer to direct packet in unassociated state.
3377                  */
3378                 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3379                                          NULL, 0, (u32) -1, true, 0,
3380                                          auth_data->bss->channel, false);
3381                 rcu_read_unlock();
3382         }
3383
3384         if (tx_flags == 0) {
3385                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3386                 ifmgd->auth_data->timeout_started = true;
3387                 run_again(sdata, auth_data->timeout);
3388         } else {
3389                 auth_data->timeout_started = false;
3390         }
3391
3392         return 0;
3393 }
3394
3395 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3396 {
3397         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3398         struct ieee80211_local *local = sdata->local;
3399
3400         sdata_assert_lock(sdata);
3401
3402         assoc_data->tries++;
3403         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3404                 sdata_info(sdata, "association with %pM timed out\n",
3405                            assoc_data->bss->bssid);
3406
3407                 /*
3408                  * Most likely AP is not in the range so remove the
3409                  * bss struct for that AP.
3410                  */
3411                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3412
3413                 return -ETIMEDOUT;
3414         }
3415
3416         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3417                    assoc_data->bss->bssid, assoc_data->tries,
3418                    IEEE80211_ASSOC_MAX_TRIES);
3419         ieee80211_send_assoc(sdata);
3420
3421         if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3422                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3423                 assoc_data->timeout_started = true;
3424                 run_again(sdata, assoc_data->timeout);
3425         } else {
3426                 assoc_data->timeout_started = false;
3427         }
3428
3429         return 0;
3430 }
3431
3432 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3433                                   __le16 fc, bool acked)
3434 {
3435         struct ieee80211_local *local = sdata->local;
3436
3437         sdata->u.mgd.status_fc = fc;
3438         sdata->u.mgd.status_acked = acked;
3439         sdata->u.mgd.status_received = true;
3440
3441         ieee80211_queue_work(&local->hw, &sdata->work);
3442 }
3443
3444 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3445 {
3446         struct ieee80211_local *local = sdata->local;
3447         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3448
3449         sdata_lock(sdata);
3450
3451         if (ifmgd->status_received) {
3452                 __le16 fc = ifmgd->status_fc;
3453                 bool status_acked = ifmgd->status_acked;
3454
3455                 ifmgd->status_received = false;
3456                 if (ifmgd->auth_data &&
3457                     (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3458                         if (status_acked) {
3459                                 ifmgd->auth_data->timeout =
3460                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3461                                 run_again(sdata, ifmgd->auth_data->timeout);
3462                         } else {
3463                                 ifmgd->auth_data->timeout = jiffies - 1;
3464                         }
3465                         ifmgd->auth_data->timeout_started = true;
3466                 } else if (ifmgd->assoc_data &&
3467                            (ieee80211_is_assoc_req(fc) ||
3468                             ieee80211_is_reassoc_req(fc))) {
3469                         if (status_acked) {
3470                                 ifmgd->assoc_data->timeout =
3471                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3472                                 run_again(sdata, ifmgd->assoc_data->timeout);
3473                         } else {
3474                                 ifmgd->assoc_data->timeout = jiffies - 1;
3475                         }
3476                         ifmgd->assoc_data->timeout_started = true;
3477                 }
3478         }
3479
3480         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3481             time_after(jiffies, ifmgd->auth_data->timeout)) {
3482                 if (ifmgd->auth_data->done) {
3483                         /*
3484                          * ok ... we waited for assoc but userspace didn't,
3485                          * so let's just kill the auth data
3486                          */
3487                         ieee80211_destroy_auth_data(sdata, false);
3488                 } else if (ieee80211_probe_auth(sdata)) {
3489                         u8 bssid[ETH_ALEN];
3490
3491                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3492
3493                         ieee80211_destroy_auth_data(sdata, false);
3494
3495                         cfg80211_auth_timeout(sdata->dev, bssid);
3496                 }
3497         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3498                 run_again(sdata, ifmgd->auth_data->timeout);
3499
3500         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3501             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3502                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3503                     ieee80211_do_assoc(sdata)) {
3504                         u8 bssid[ETH_ALEN];
3505
3506                         memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3507
3508                         ieee80211_destroy_assoc_data(sdata, false);
3509
3510                         cfg80211_assoc_timeout(sdata->dev, bssid);
3511                 }
3512         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3513                 run_again(sdata, ifmgd->assoc_data->timeout);
3514
3515         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3516                             IEEE80211_STA_CONNECTION_POLL) &&
3517             ifmgd->associated) {
3518                 u8 bssid[ETH_ALEN];
3519                 int max_tries;
3520
3521                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3522
3523                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3524                         max_tries = max_nullfunc_tries;
3525                 else
3526                         max_tries = max_probe_tries;
3527
3528                 /* ACK received for nullfunc probing frame */
3529                 if (!ifmgd->probe_send_count)
3530                         ieee80211_reset_ap_probe(sdata);
3531                 else if (ifmgd->nullfunc_failed) {
3532                         if (ifmgd->probe_send_count < max_tries) {
3533                                 mlme_dbg(sdata,
3534                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3535                                          bssid, ifmgd->probe_send_count,
3536                                          max_tries);
3537                                 ieee80211_mgd_probe_ap_send(sdata);
3538                         } else {
3539                                 mlme_dbg(sdata,
3540                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3541                                          bssid);
3542                                 ieee80211_sta_connection_lost(sdata, bssid,
3543                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3544                                         false);
3545                         }
3546                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3547                         run_again(sdata, ifmgd->probe_timeout);
3548                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3549                         mlme_dbg(sdata,
3550                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3551                                  bssid, probe_wait_ms);
3552                         ieee80211_sta_connection_lost(sdata, bssid,
3553                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3554                 } else if (ifmgd->probe_send_count < max_tries) {
3555                         mlme_dbg(sdata,
3556                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3557                                  bssid, probe_wait_ms,
3558                                  ifmgd->probe_send_count, max_tries);
3559                         ieee80211_mgd_probe_ap_send(sdata);
3560                 } else {
3561                         /*
3562                          * We actually lost the connection ... or did we?
3563                          * Let's make sure!
3564                          */
3565                         wiphy_debug(local->hw.wiphy,
3566                                     "%s: No probe response from AP %pM"
3567                                     " after %dms, disconnecting.\n",
3568                                     sdata->name,
3569                                     bssid, probe_wait_ms);
3570
3571                         ieee80211_sta_connection_lost(sdata, bssid,
3572                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3573                 }
3574         }
3575
3576         sdata_unlock(sdata);
3577 }
3578
3579 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3580 {
3581         struct ieee80211_sub_if_data *sdata =
3582                 (struct ieee80211_sub_if_data *) data;
3583         struct ieee80211_local *local = sdata->local;
3584
3585         if (local->quiescing)
3586                 return;
3587
3588         sdata->u.mgd.connection_loss = false;
3589         ieee80211_queue_work(&sdata->local->hw,
3590                              &sdata->u.mgd.beacon_connection_loss_work);
3591 }
3592
3593 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3594 {
3595         struct ieee80211_sub_if_data *sdata =
3596                 (struct ieee80211_sub_if_data *) data;
3597         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3598         struct ieee80211_local *local = sdata->local;
3599
3600         if (local->quiescing)
3601                 return;
3602
3603         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3604 }
3605
3606 static void ieee80211_sta_monitor_work(struct work_struct *work)
3607 {
3608         struct ieee80211_sub_if_data *sdata =
3609                 container_of(work, struct ieee80211_sub_if_data,
3610                              u.mgd.monitor_work);
3611
3612         ieee80211_mgd_probe_ap(sdata, false);
3613 }
3614
3615 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3616 {
3617         u32 flags;
3618
3619         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3620                 __ieee80211_stop_poll(sdata);
3621
3622                 /* let's probe the connection once */
3623                 flags = sdata->local->hw.flags;
3624                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3625                         ieee80211_queue_work(&sdata->local->hw,
3626                                              &sdata->u.mgd.monitor_work);
3627                 /* and do all the other regular work too */
3628                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3629         }
3630 }
3631
3632 #ifdef CONFIG_PM
3633 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3634 {
3635         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3636
3637         sdata_lock(sdata);
3638         if (!ifmgd->associated) {
3639                 sdata_unlock(sdata);
3640                 return;
3641         }
3642
3643         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3644                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3645                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3646                 ieee80211_sta_connection_lost(sdata,
3647                                               ifmgd->associated->bssid,
3648                                               WLAN_REASON_UNSPECIFIED,
3649                                               true);
3650                 sdata_unlock(sdata);
3651                 return;
3652         }
3653         sdata_unlock(sdata);
3654 }
3655 #endif
3656
3657 /* interface setup */
3658 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3659 {
3660         struct ieee80211_if_managed *ifmgd;
3661
3662         ifmgd = &sdata->u.mgd;
3663         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3664         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3665         INIT_WORK(&ifmgd->beacon_connection_loss_work,
3666                   ieee80211_beacon_connection_loss_work);
3667         INIT_WORK(&ifmgd->csa_connection_drop_work,
3668                   ieee80211_csa_connection_drop_work);
3669         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3670         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3671                     (unsigned long) sdata);
3672         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3673                     (unsigned long) sdata);
3674         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3675                     (unsigned long) sdata);
3676         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3677                     (unsigned long) sdata);
3678
3679         ifmgd->flags = 0;
3680         ifmgd->powersave = sdata->wdev.ps;
3681         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3682         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3683         ifmgd->p2p_noa_index = -1;
3684
3685         if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3686                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3687         else
3688                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3689 }
3690
3691 /* scan finished notification */
3692 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3693 {
3694         struct ieee80211_sub_if_data *sdata;
3695
3696         /* Restart STA timers */
3697         rcu_read_lock();
3698         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3699                 if (ieee80211_sdata_running(sdata))
3700                         ieee80211_restart_sta_timer(sdata);
3701         }
3702         rcu_read_unlock();
3703 }
3704
3705 int ieee80211_max_network_latency(struct notifier_block *nb,
3706                                   unsigned long data, void *dummy)
3707 {
3708         s32 latency_usec = (s32) data;
3709         struct ieee80211_local *local =
3710                 container_of(nb, struct ieee80211_local,
3711                              network_latency_notifier);
3712
3713         mutex_lock(&local->iflist_mtx);
3714         ieee80211_recalc_ps(local, latency_usec);
3715         mutex_unlock(&local->iflist_mtx);
3716
3717         return 0;
3718 }
3719
3720 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3721                                      struct cfg80211_bss *cbss)
3722 {
3723         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3724         const u8 *ht_cap_ie, *vht_cap_ie;
3725         const struct ieee80211_ht_cap *ht_cap;
3726         const struct ieee80211_vht_cap *vht_cap;
3727         u8 chains = 1;
3728
3729         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3730                 return chains;
3731
3732         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3733         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3734                 ht_cap = (void *)(ht_cap_ie + 2);
3735                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3736                 /*
3737                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3738                  *       "Tx Unequal Modulation Supported" fields.
3739                  */
3740         }
3741
3742         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3743                 return chains;
3744
3745         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3746         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3747                 u8 nss;
3748                 u16 tx_mcs_map;
3749
3750                 vht_cap = (void *)(vht_cap_ie + 2);
3751                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3752                 for (nss = 8; nss > 0; nss--) {
3753                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3754                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
3755                                 break;
3756                 }
3757                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3758                 chains = max(chains, nss);
3759         }
3760
3761         return chains;
3762 }
3763
3764 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3765                                   struct cfg80211_bss *cbss)
3766 {
3767         struct ieee80211_local *local = sdata->local;
3768         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3769         const struct ieee80211_ht_operation *ht_oper = NULL;
3770         const struct ieee80211_vht_operation *vht_oper = NULL;
3771         struct ieee80211_supported_band *sband;
3772         struct cfg80211_chan_def chandef;
3773         int ret;
3774
3775         sband = local->hw.wiphy->bands[cbss->channel->band];
3776
3777         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3778                           IEEE80211_STA_DISABLE_80P80MHZ |
3779                           IEEE80211_STA_DISABLE_160MHZ);
3780
3781         rcu_read_lock();
3782
3783         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3784             sband->ht_cap.ht_supported) {
3785                 const u8 *ht_oper_ie, *ht_cap;
3786
3787                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3788                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3789                         ht_oper = (void *)(ht_oper_ie + 2);
3790
3791                 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3792                 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3793                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3794                         ht_oper = NULL;
3795                 }
3796         }
3797
3798         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3799             sband->vht_cap.vht_supported) {
3800                 const u8 *vht_oper_ie, *vht_cap;
3801
3802                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3803                                                    WLAN_EID_VHT_OPERATION);
3804                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3805                         vht_oper = (void *)(vht_oper_ie + 2);
3806                 if (vht_oper && !ht_oper) {
3807                         vht_oper = NULL;
3808                         sdata_info(sdata,
3809                                    "AP advertised VHT without HT, disabling both\n");
3810                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3811                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3812                 }
3813
3814                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3815                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3816                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3817                         vht_oper = NULL;
3818                 }
3819         }
3820
3821         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3822                                                      cbss->channel,
3823                                                      ht_oper, vht_oper,
3824                                                      &chandef, true);
3825
3826         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3827                                       local->rx_chains);
3828
3829         rcu_read_unlock();
3830
3831         /* will change later if needed */
3832         sdata->smps_mode = IEEE80211_SMPS_OFF;
3833
3834         /*
3835          * If this fails (possibly due to channel context sharing
3836          * on incompatible channels, e.g. 80+80 and 160 sharing the
3837          * same control channel) try to use a smaller bandwidth.
3838          */
3839         ret = ieee80211_vif_use_channel(sdata, &chandef,
3840                                         IEEE80211_CHANCTX_SHARED);
3841         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3842                 ifmgd->flags |= chandef_downgrade(&chandef);
3843                 ret = ieee80211_vif_use_channel(sdata, &chandef,
3844                                                 IEEE80211_CHANCTX_SHARED);
3845         }
3846         return ret;
3847 }
3848
3849 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3850                                      struct cfg80211_bss *cbss, bool assoc)
3851 {
3852         struct ieee80211_local *local = sdata->local;
3853         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3854         struct ieee80211_bss *bss = (void *)cbss->priv;
3855         struct sta_info *new_sta = NULL;
3856         bool have_sta = false;
3857         int err;
3858
3859         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3860                 return -EINVAL;
3861
3862         if (assoc) {
3863                 rcu_read_lock();
3864                 have_sta = sta_info_get(sdata, cbss->bssid);
3865                 rcu_read_unlock();
3866         }
3867
3868         if (!have_sta) {
3869                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3870                 if (!new_sta)
3871                         return -ENOMEM;
3872         }
3873
3874         if (new_sta) {
3875                 u32 rates = 0, basic_rates = 0;
3876                 bool have_higher_than_11mbit;
3877                 int min_rate = INT_MAX, min_rate_index = -1;
3878                 struct ieee80211_supported_band *sband;
3879                 const struct cfg80211_bss_ies *ies;
3880
3881                 sband = local->hw.wiphy->bands[cbss->channel->band];
3882
3883                 err = ieee80211_prep_channel(sdata, cbss);
3884                 if (err) {
3885                         sta_info_free(local, new_sta);
3886                         return err;
3887                 }
3888
3889                 ieee80211_get_rates(sband, bss->supp_rates,
3890                                     bss->supp_rates_len,
3891                                     &rates, &basic_rates,
3892                                     &have_higher_than_11mbit,
3893                                     &min_rate, &min_rate_index);
3894
3895                 /*
3896                  * This used to be a workaround for basic rates missing
3897                  * in the association response frame. Now that we no
3898                  * longer use the basic rates from there, it probably
3899                  * doesn't happen any more, but keep the workaround so
3900                  * in case some *other* APs are buggy in different ways
3901                  * we can connect -- with a warning.
3902                  */
3903                 if (!basic_rates && min_rate_index >= 0) {
3904                         sdata_info(sdata,
3905                                    "No basic rates, using min rate instead\n");
3906                         basic_rates = BIT(min_rate_index);
3907                 }
3908
3909                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3910                 sdata->vif.bss_conf.basic_rates = basic_rates;
3911
3912                 /* cf. IEEE 802.11 9.2.12 */
3913                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3914                     have_higher_than_11mbit)
3915                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3916                 else
3917                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3918
3919                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3920
3921                 /* set timing information */
3922                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3923                 rcu_read_lock();
3924                 ies = rcu_dereference(cbss->beacon_ies);
3925                 if (ies) {
3926                         const u8 *tim_ie;
3927
3928                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3929                         sdata->vif.bss_conf.sync_device_ts =
3930                                 bss->device_ts_beacon;
3931                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3932                                                   ies->data, ies->len);
3933                         if (tim_ie && tim_ie[1] >= 2)
3934                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3935                         else
3936                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3937                 } else if (!(local->hw.flags &
3938                                         IEEE80211_HW_TIMING_BEACON_ONLY)) {
3939                         ies = rcu_dereference(cbss->proberesp_ies);
3940                         /* must be non-NULL since beacon IEs were NULL */
3941                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3942                         sdata->vif.bss_conf.sync_device_ts =
3943                                 bss->device_ts_presp;
3944                         sdata->vif.bss_conf.sync_dtim_count = 0;
3945                 } else {
3946                         sdata->vif.bss_conf.sync_tsf = 0;
3947                         sdata->vif.bss_conf.sync_device_ts = 0;
3948                         sdata->vif.bss_conf.sync_dtim_count = 0;
3949                 }
3950                 rcu_read_unlock();
3951
3952                 /* tell driver about BSSID, basic rates and timing */
3953                 ieee80211_bss_info_change_notify(sdata,
3954                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3955                         BSS_CHANGED_BEACON_INT);
3956
3957                 if (assoc)
3958                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3959
3960                 err = sta_info_insert(new_sta);
3961                 new_sta = NULL;
3962                 if (err) {
3963                         sdata_info(sdata,
3964                                    "failed to insert STA entry for the AP (error %d)\n",
3965                                    err);
3966                         return err;
3967                 }
3968         } else
3969                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3970
3971         return 0;
3972 }
3973
3974 /* config hooks */
3975 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3976                        struct cfg80211_auth_request *req)
3977 {
3978         struct ieee80211_local *local = sdata->local;
3979         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3980         struct ieee80211_mgd_auth_data *auth_data;
3981         u16 auth_alg;
3982         int err;
3983
3984         /* prepare auth data structure */
3985
3986         switch (req->auth_type) {
3987         case NL80211_AUTHTYPE_OPEN_SYSTEM:
3988                 auth_alg = WLAN_AUTH_OPEN;
3989                 break;
3990         case NL80211_AUTHTYPE_SHARED_KEY:
3991                 if (IS_ERR(local->wep_tx_tfm))
3992                         return -EOPNOTSUPP;
3993                 auth_alg = WLAN_AUTH_SHARED_KEY;
3994                 break;
3995         case NL80211_AUTHTYPE_FT:
3996                 auth_alg = WLAN_AUTH_FT;
3997                 break;
3998         case NL80211_AUTHTYPE_NETWORK_EAP:
3999                 auth_alg = WLAN_AUTH_LEAP;
4000                 break;
4001         case NL80211_AUTHTYPE_SAE:
4002                 auth_alg = WLAN_AUTH_SAE;
4003                 break;
4004         default:
4005                 return -EOPNOTSUPP;
4006         }
4007
4008         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4009                             req->ie_len, GFP_KERNEL);
4010         if (!auth_data)
4011                 return -ENOMEM;
4012
4013         auth_data->bss = req->bss;
4014
4015         if (req->sae_data_len >= 4) {
4016                 __le16 *pos = (__le16 *) req->sae_data;
4017                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4018                 auth_data->sae_status = le16_to_cpu(pos[1]);
4019                 memcpy(auth_data->data, req->sae_data + 4,
4020                        req->sae_data_len - 4);
4021                 auth_data->data_len += req->sae_data_len - 4;
4022         }
4023
4024         if (req->ie && req->ie_len) {
4025                 memcpy(&auth_data->data[auth_data->data_len],
4026                        req->ie, req->ie_len);
4027                 auth_data->data_len += req->ie_len;
4028         }
4029
4030         if (req->key && req->key_len) {
4031                 auth_data->key_len = req->key_len;
4032                 auth_data->key_idx = req->key_idx;
4033                 memcpy(auth_data->key, req->key, req->key_len);
4034         }
4035
4036         auth_data->algorithm = auth_alg;
4037
4038         /* try to authenticate/probe */
4039
4040         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4041             ifmgd->assoc_data) {
4042                 err = -EBUSY;
4043                 goto err_free;
4044         }
4045
4046         if (ifmgd->auth_data)
4047                 ieee80211_destroy_auth_data(sdata, false);
4048
4049         /* prep auth_data so we don't go into idle on disassoc */
4050         ifmgd->auth_data = auth_data;
4051
4052         if (ifmgd->associated) {
4053                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4054
4055                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4056                                        WLAN_REASON_UNSPECIFIED,
4057                                        false, frame_buf);
4058
4059                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4060                                       sizeof(frame_buf));
4061         }
4062
4063         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4064
4065         err = ieee80211_prep_connection(sdata, req->bss, false);
4066         if (err)
4067                 goto err_clear;
4068
4069         err = ieee80211_probe_auth(sdata);
4070         if (err) {
4071                 sta_info_destroy_addr(sdata, req->bss->bssid);
4072                 goto err_clear;
4073         }
4074
4075         /* hold our own reference */
4076         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4077         return 0;
4078
4079  err_clear:
4080         memset(ifmgd->bssid, 0, ETH_ALEN);
4081         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4082         ifmgd->auth_data = NULL;
4083  err_free:
4084         kfree(auth_data);
4085         return err;
4086 }
4087
4088 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4089                         struct cfg80211_assoc_request *req)
4090 {
4091         struct ieee80211_local *local = sdata->local;
4092         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4093         struct ieee80211_bss *bss = (void *)req->bss->priv;
4094         struct ieee80211_mgd_assoc_data *assoc_data;
4095         const struct cfg80211_bss_ies *beacon_ies;
4096         struct ieee80211_supported_band *sband;
4097         const u8 *ssidie, *ht_ie, *vht_ie;
4098         int i, err;
4099
4100         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4101         if (!assoc_data)
4102                 return -ENOMEM;
4103
4104         rcu_read_lock();
4105         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4106         if (!ssidie) {
4107                 rcu_read_unlock();
4108                 kfree(assoc_data);
4109                 return -EINVAL;
4110         }
4111         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4112         assoc_data->ssid_len = ssidie[1];
4113         rcu_read_unlock();
4114
4115         if (ifmgd->associated) {
4116                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4117
4118                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4119                                        WLAN_REASON_UNSPECIFIED,
4120                                        false, frame_buf);
4121
4122                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4123                                       sizeof(frame_buf));
4124         }
4125
4126         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4127                 err = -EBUSY;
4128                 goto err_free;
4129         }
4130
4131         if (ifmgd->assoc_data) {
4132                 err = -EBUSY;
4133                 goto err_free;
4134         }
4135
4136         if (ifmgd->auth_data) {
4137                 bool match;
4138
4139                 /* keep sta info, bssid if matching */
4140                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4141                 ieee80211_destroy_auth_data(sdata, match);
4142         }
4143
4144         /* prepare assoc data */
4145
4146         ifmgd->beacon_crc_valid = false;
4147
4148         /*
4149          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4150          * We still associate in non-HT mode (11a/b/g) if any one of these
4151          * ciphers is configured as pairwise.
4152          * We can set this to true for non-11n hardware, that'll be checked
4153          * separately along with the peer capabilities.
4154          */
4155         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4156                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4157                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4158                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4159                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4160                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4161                         netdev_info(sdata->dev,
4162                                     "disabling HT/VHT due to WEP/TKIP use\n");
4163                 }
4164         }
4165
4166         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4167                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4168                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4169         }
4170
4171         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4172                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4173
4174         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4175         sband = local->hw.wiphy->bands[req->bss->channel->band];
4176         if (!sband->ht_cap.ht_supported ||
4177             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4178                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4179                 if (!bss->wmm_used)
4180                         netdev_info(sdata->dev,
4181                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4182         }
4183
4184         /* disable VHT if we don't support it or the AP doesn't use WMM */
4185         if (!sband->vht_cap.vht_supported ||
4186             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4187                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4188                 if (!bss->wmm_used)
4189                         netdev_info(sdata->dev,
4190                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4191         }
4192
4193         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4194         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4195                sizeof(ifmgd->ht_capa_mask));
4196
4197         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4198         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4199                sizeof(ifmgd->vht_capa_mask));
4200
4201         if (req->ie && req->ie_len) {
4202                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4203                 assoc_data->ie_len = req->ie_len;
4204         }
4205
4206         assoc_data->bss = req->bss;
4207
4208         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4209                 if (ifmgd->powersave)
4210                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4211                 else
4212                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4213         } else
4214                 sdata->smps_mode = ifmgd->req_smps;
4215
4216         assoc_data->capability = req->bss->capability;
4217         assoc_data->wmm = bss->wmm_used &&
4218                           (local->hw.queues >= IEEE80211_NUM_ACS);
4219         assoc_data->supp_rates = bss->supp_rates;
4220         assoc_data->supp_rates_len = bss->supp_rates_len;
4221
4222         rcu_read_lock();
4223         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4224         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4225                 assoc_data->ap_ht_param =
4226                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4227         else
4228                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4229         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4230         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4231                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4232                        sizeof(struct ieee80211_vht_cap));
4233         else
4234                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4235         rcu_read_unlock();
4236
4237         if (bss->wmm_used && bss->uapsd_supported &&
4238             (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4239             sdata->wmm_acm != 0xff) {
4240                 assoc_data->uapsd = true;
4241                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4242         } else {
4243                 assoc_data->uapsd = false;
4244                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4245         }
4246
4247         if (req->prev_bssid)
4248                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4249
4250         if (req->use_mfp) {
4251                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4252                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4253         } else {
4254                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4255                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4256         }
4257
4258         if (req->crypto.control_port)
4259                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4260         else
4261                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4262
4263         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4264         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4265
4266         /* kick off associate process */
4267
4268         ifmgd->assoc_data = assoc_data;
4269         ifmgd->dtim_period = 0;
4270         ifmgd->have_beacon = false;
4271
4272         err = ieee80211_prep_connection(sdata, req->bss, true);
4273         if (err)
4274                 goto err_clear;
4275
4276         rcu_read_lock();
4277         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4278
4279         if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4280             !beacon_ies) {
4281                 /*
4282                  * Wait up to one beacon interval ...
4283                  * should this be more if we miss one?
4284                  */
4285                 sdata_info(sdata, "waiting for beacon from %pM\n",
4286                            ifmgd->bssid);
4287                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4288                 assoc_data->timeout_started = true;
4289                 assoc_data->need_beacon = true;
4290         } else if (beacon_ies) {
4291                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4292                                                     beacon_ies->data,
4293                                                     beacon_ies->len);
4294                 u8 dtim_count = 0;
4295
4296                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4297                         const struct ieee80211_tim_ie *tim;
4298                         tim = (void *)(tim_ie + 2);
4299                         ifmgd->dtim_period = tim->dtim_period;
4300                         dtim_count = tim->dtim_count;
4301                 }
4302                 ifmgd->have_beacon = true;
4303                 assoc_data->timeout = jiffies;
4304                 assoc_data->timeout_started = true;
4305
4306                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4307                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4308                         sdata->vif.bss_conf.sync_device_ts =
4309                                 bss->device_ts_beacon;
4310                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4311                 }
4312         } else {
4313                 assoc_data->timeout = jiffies;
4314                 assoc_data->timeout_started = true;
4315         }
4316         rcu_read_unlock();
4317
4318         run_again(sdata, assoc_data->timeout);
4319
4320         if (bss->corrupt_data) {
4321                 char *corrupt_type = "data";
4322                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4323                         if (bss->corrupt_data &
4324                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4325                                 corrupt_type = "beacon and probe response";
4326                         else
4327                                 corrupt_type = "beacon";
4328                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4329                         corrupt_type = "probe response";
4330                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4331                            corrupt_type);
4332         }
4333
4334         return 0;
4335  err_clear:
4336         memset(ifmgd->bssid, 0, ETH_ALEN);
4337         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4338         ifmgd->assoc_data = NULL;
4339  err_free:
4340         kfree(assoc_data);
4341         return err;
4342 }
4343
4344 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4345                          struct cfg80211_deauth_request *req)
4346 {
4347         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4348         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4349         bool tx = !req->local_state_change;
4350         bool report_frame = false;
4351
4352         sdata_info(sdata,
4353                    "deauthenticating from %pM by local choice (reason=%d)\n",
4354                    req->bssid, req->reason_code);
4355
4356         if (ifmgd->auth_data) {
4357                 drv_mgd_prepare_tx(sdata->local, sdata);
4358                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4359                                                IEEE80211_STYPE_DEAUTH,
4360                                                req->reason_code, tx,
4361                                                frame_buf);
4362                 ieee80211_destroy_auth_data(sdata, false);
4363
4364                 report_frame = true;
4365                 goto out;
4366         }
4367
4368         if (ifmgd->associated &&
4369             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4370                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4371                                        req->reason_code, tx, frame_buf);
4372                 report_frame = true;
4373         }
4374
4375  out:
4376         if (report_frame)
4377                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4378                                       IEEE80211_DEAUTH_FRAME_LEN);
4379
4380         return 0;
4381 }
4382
4383 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4384                            struct cfg80211_disassoc_request *req)
4385 {
4386         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4387         u8 bssid[ETH_ALEN];
4388         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4389
4390         /*
4391          * cfg80211 should catch this ... but it's racy since
4392          * we can receive a disassoc frame, process it, hand it
4393          * to cfg80211 while that's in a locked section already
4394          * trying to tell us that the user wants to disconnect.
4395          */
4396         if (ifmgd->associated != req->bss)
4397                 return -ENOLINK;
4398
4399         sdata_info(sdata,
4400                    "disassociating from %pM by local choice (reason=%d)\n",
4401                    req->bss->bssid, req->reason_code);
4402
4403         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4404         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4405                                req->reason_code, !req->local_state_change,
4406                                frame_buf);
4407
4408         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4409                               IEEE80211_DEAUTH_FRAME_LEN);
4410
4411         return 0;
4412 }
4413
4414 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4415 {
4416         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4417
4418         /*
4419          * Make sure some work items will not run after this,
4420          * they will not do anything but might not have been
4421          * cancelled when disconnecting.
4422          */
4423         cancel_work_sync(&ifmgd->monitor_work);
4424         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4425         cancel_work_sync(&ifmgd->request_smps_work);
4426         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4427         cancel_work_sync(&ifmgd->chswitch_work);
4428
4429         sdata_lock(sdata);
4430         if (ifmgd->assoc_data)
4431                 ieee80211_destroy_assoc_data(sdata, false);
4432         if (ifmgd->auth_data)
4433                 ieee80211_destroy_auth_data(sdata, false);
4434         del_timer_sync(&ifmgd->timer);
4435         sdata_unlock(sdata);
4436 }
4437
4438 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4439                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4440                                gfp_t gfp)
4441 {
4442         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4443
4444         trace_api_cqm_rssi_notify(sdata, rssi_event);
4445
4446         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4447 }
4448 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);