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  * Copyright 2013-2014  Intel Mobile Communications GmbH
   9  * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
  10  * Copyright (C) 2018        Intel Corporation
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  */
  16
  17 #include <linux/delay.h>
  18 #include <linux/if_ether.h>
  19 #include <linux/skbuff.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/moduleparam.h>
  23 #include <linux/rtnetlink.h>
  24 #include <linux/crc32.h>
  25 #include <linux/slab.h>
  26 #include <linux/export.h>
  27 #include <net/mac80211.h>
  28 #include <asm/unaligned.h>
  29
  30 #include "ieee80211_i.h"
  31 #include "driver-ops.h"
  32 #include "rate.h"
  33 #include "led.h"
  34 #include "fils_aead.h"
  35
  36 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  37 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  38 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  39 #define IEEE80211_AUTH_TIMEOUT_SAE      (HZ * 2)
  40 #define IEEE80211_AUTH_MAX_TRIES        3
  41 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  42 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  43 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  44 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  45 #define IEEE80211_ASSOC_MAX_TRIES       3
  46
  47 static int max_nullfunc_tries = 2;
  48 module_param(max_nullfunc_tries, int, 0644);
  49 MODULE_PARM_DESC(max_nullfunc_tries,
  50                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  51
  52 static int max_probe_tries = 5;
  53 module_param(max_probe_tries, int, 0644);
  54 MODULE_PARM_DESC(max_probe_tries,
  55                  "Maximum probe tries before disconnecting (reason 4).");
  56
  57 /*
  58  * Beacon loss timeout is calculated as N frames times the
  59  * advertised beacon interval.  This may need to be somewhat
  60  * higher than what hardware might detect to account for
  61  * delays in the host processing frames. But since we also
  62  * probe on beacon miss before declaring the connection lost
  63  * default to what we want.
  64  */
  65 static int beacon_loss_count = 7;
  66 module_param(beacon_loss_count, int, 0644);
  67 MODULE_PARM_DESC(beacon_loss_count,
  68                  "Number of beacon intervals before we decide beacon was lost.");
  69
  70 /*
  71  * Time the connection can be idle before we probe
  72  * it to see if we can still talk to the AP.
  73  */
  74 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  75 /*
  76  * Time we wait for a probe response after sending
  77  * a probe request because of beacon loss or for
  78  * checking the connection still works.
  79  */
  80 static int probe_wait_ms = 500;
  81 module_param(probe_wait_ms, int, 0644);
  82 MODULE_PARM_DESC(probe_wait_ms,
  83                  "Maximum time(ms) to wait for probe response"
  84                  " before disconnecting (reason 4).");
  85
  86 /*
  87  * How many Beacon frames need to have been used in average signal strength
  88  * before starting to indicate signal change events.
  89  */
  90 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  91
  92 /*
  93  * We can have multiple work items (and connection probing)
  94  * scheduling this timer, but we need to take care to only
  95  * reschedule it when it should fire _earlier_ than it was
  96  * asked for before, or if it's not pending right now. This
  97  * function ensures that. Note that it then is required to
  98  * run this function for all timeouts after the first one
  99  * has happened -- the work that runs from this timer will
 100  * do that.
 101  */
 102 static void run_again(struct ieee80211_sub_if_data *sdata,
 103                       unsigned long timeout)
 104 {
 105         sdata_assert_lock(sdata);
 106
 107         if (!timer_pending(&sdata->u.mgd.timer) ||
 108             time_before(timeout, sdata->u.mgd.timer.expires))
 109                 mod_timer(&sdata->u.mgd.timer, timeout);
 110 }
 111
 112 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 113 {
 114         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 115                 return;
 116
 117         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 118                 return;
 119
 120         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 121                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 122 }
 123
 124 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 125 {
 126         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 127
 128         if (unlikely(!ifmgd->associated))
 129                 return;
 130
 131         if (ifmgd->probe_send_count)
 132                 ifmgd->probe_send_count = 0;
 133
 134         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 135                 return;
 136
 137         mod_timer(&ifmgd->conn_mon_timer,
 138                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 139 }
 140
 141 static int ecw2cw(int ecw)
 142 {
 143         return (1 << ecw) - 1;
 144 }
 145
 146 static u32
 147 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 148                              struct ieee80211_supported_band *sband,
 149                              struct ieee80211_channel *channel,
 150                              const struct ieee80211_ht_operation *ht_oper,
 151                              const struct ieee80211_vht_operation *vht_oper,
 152                              const struct ieee80211_he_operation *he_oper,
 153                              struct cfg80211_chan_def *chandef, bool tracking)
 154 {
 155         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 156         struct cfg80211_chan_def vht_chandef;
 157         struct ieee80211_sta_ht_cap sta_ht_cap;
 158         u32 ht_cfreq, ret;
 159
 160         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 161         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 162
 163         chandef->chan = channel;
 164         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 165         chandef->center_freq1 = channel->center_freq;
 166         chandef->center_freq2 = 0;
 167
 168         if (!ht_oper || !sta_ht_cap.ht_supported) {
 169                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 170                 goto out;
 171         }
 172
 173         chandef->width = NL80211_CHAN_WIDTH_20;
 174
 175         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 176                                                   channel->band);
 177         /* check that channel matches the right operating channel */
 178         if (!tracking && channel->center_freq != ht_cfreq) {
 179                 /*
 180                  * It's possible that some APs are confused here;
 181                  * Netgear WNDR3700 sometimes reports 4 higher than
 182                  * the actual channel in association responses, but
 183                  * since we look at probe response/beacon data here
 184                  * it should be OK.
 185                  */
 186                 sdata_info(sdata,
 187                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 188                            channel->center_freq, ht_cfreq,
 189                            ht_oper->primary_chan, channel->band);
 190                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 191                 goto out;
 192         }
 193
 194         /* check 40 MHz support, if we have it */
 195         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 196                 ieee80211_chandef_ht_oper(ht_oper, chandef);
 197         } else {
 198                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 199                 ret = IEEE80211_STA_DISABLE_VHT;
 200                 /* also mark 40 MHz disabled */
 201                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 202                 goto out;
 203         }
 204
 205         if (!vht_oper || !sband->vht_cap.vht_supported) {
 206                 ret = IEEE80211_STA_DISABLE_VHT;
 207                 goto out;
 208         }
 209
 210         vht_chandef = *chandef;
 211         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
 212             (le32_to_cpu(he_oper->he_oper_params) &
 213              IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
 214                 struct ieee80211_vht_operation he_oper_vht_cap;
 215
 216                 /*
 217                  * Set only first 3 bytes (other 2 aren't used in
 218                  * ieee80211_chandef_vht_oper() anyway)
 219                  */
 220                 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
 221                 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
 222
 223                 if (!ieee80211_chandef_vht_oper(&he_oper_vht_cap,
 224                                                 &vht_chandef)) {
 225                         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
 226                                 sdata_info(sdata,
 227                                            "HE AP VHT information is invalid, disable HE\n");
 228                         ret = IEEE80211_STA_DISABLE_HE;
 229                         goto out;
 230                 }
 231         } else if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
 232                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 233                         sdata_info(sdata,
 234                                    "AP VHT information is invalid, disable VHT\n");
 235                 ret = IEEE80211_STA_DISABLE_VHT;
 236                 goto out;
 237         }
 238
 239         if (!cfg80211_chandef_valid(&vht_chandef)) {
 240                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 241                         sdata_info(sdata,
 242                                    "AP VHT information is invalid, disable VHT\n");
 243                 ret = IEEE80211_STA_DISABLE_VHT;
 244                 goto out;
 245         }
 246
 247         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 248                 ret = 0;
 249                 goto out;
 250         }
 251
 252         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 253                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 254                         sdata_info(sdata,
 255                                    "AP VHT information doesn't match HT, disable VHT\n");
 256                 ret = IEEE80211_STA_DISABLE_VHT;
 257                 goto out;
 258         }
 259
 260         *chandef = vht_chandef;
 261
 262         ret = 0;
 263
 264 out:
 265         /*
 266          * When tracking the current AP, don't do any further checks if the
 267          * new chandef is identical to the one we're currently using for the
 268          * connection. This keeps us from playing ping-pong with regulatory,
 269          * without it the following can happen (for example):
 270          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 271          *  - AP advertises regdom US
 272          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 273          *  - the code below detects an unsupported channel, downgrades, and
 274          *    we disconnect from the AP in the caller
 275          *  - disconnect causes CRDA to reload world regdomain and the game
 276          *    starts anew.
 277          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 278          *
 279          * It seems possible that there are still scenarios with CSA or real
 280          * bandwidth changes where a this could happen, but those cases are
 281          * less common and wouldn't completely prevent using the AP.
 282          */
 283         if (tracking &&
 284             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 285                 return ret;
 286
 287         /* don't print the message below for VHT mismatch if VHT is disabled */
 288         if (ret & IEEE80211_STA_DISABLE_VHT)
 289                 vht_chandef = *chandef;
 290
 291         /*
 292          * Ignore the DISABLED flag when we're already connected and only
 293          * tracking the APs beacon for bandwidth changes - otherwise we
 294          * might get disconnected here if we connect to an AP, update our
 295          * regulatory information based on the AP's country IE and the
 296          * information we have is wrong/outdated and disables the channel
 297          * that we're actually using for the connection to the AP.
 298          */
 299         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 300                                         tracking ? 0 :
 301                                                    IEEE80211_CHAN_DISABLED)) {
 302                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 303                         ret = IEEE80211_STA_DISABLE_HT |
 304                               IEEE80211_STA_DISABLE_VHT;
 305                         break;
 306                 }
 307
 308                 ret |= ieee80211_chandef_downgrade(chandef);
 309         }
 310
 311         if (chandef->width != vht_chandef.width && !tracking)
 312                 sdata_info(sdata,
 313                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 314
 315         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 316         return ret;
 317 }
 318
 319 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 320                                struct sta_info *sta,
 321                                const struct ieee80211_ht_cap *ht_cap,
 322                                const struct ieee80211_ht_operation *ht_oper,
 323                                const struct ieee80211_vht_operation *vht_oper,
 324                                const struct ieee80211_he_operation *he_oper,
 325                                const u8 *bssid, u32 *changed)
 326 {
 327         struct ieee80211_local *local = sdata->local;
 328         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 329         struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
 330         struct ieee80211_supported_band *sband =
 331                 local->hw.wiphy->bands[chan->band];
 332         struct cfg80211_chan_def chandef;
 333         u16 ht_opmode;
 334         u32 flags;
 335         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 336         int ret;
 337
 338         /* if HT was/is disabled, don't track any bandwidth changes */
 339         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 340                 return 0;
 341
 342         /* don't check VHT if we associated as non-VHT station */
 343         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 344                 vht_oper = NULL;
 345
 346         /* don't check HE if we associated as non-HE station */
 347         if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
 348             !ieee80211_get_he_sta_cap(sband))
 349                 he_oper = NULL;
 350
 351         if (WARN_ON_ONCE(!sta))
 352                 return -EINVAL;
 353
 354         /*
 355          * if bss configuration changed store the new one -
 356          * this may be applicable even if channel is identical
 357          */
 358         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 359         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 360                 *changed |= BSS_CHANGED_HT;
 361                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 362         }
 363
 364         /* calculate new channel (type) based on HT/VHT/HE operation IEs */
 365         flags = ieee80211_determine_chantype(sdata, sband, chan,
 366                                              ht_oper, vht_oper, he_oper,
 367                                              &chandef, true);
 368
 369         /*
 370          * Downgrade the new channel if we associated with restricted
 371          * capabilities. For example, if we associated as a 20 MHz STA
 372          * to a 40 MHz AP (due to regulatory, capabilities or config
 373          * reasons) then switching to a 40 MHz channel now won't do us
 374          * any good -- we couldn't use it with the AP.
 375          */
 376         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 377             chandef.width == NL80211_CHAN_WIDTH_80P80)
 378                 flags |= ieee80211_chandef_downgrade(&chandef);
 379         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 380             chandef.width == NL80211_CHAN_WIDTH_160)
 381                 flags |= ieee80211_chandef_downgrade(&chandef);
 382         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 383             chandef.width > NL80211_CHAN_WIDTH_20)
 384                 flags |= ieee80211_chandef_downgrade(&chandef);
 385
 386         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 387                 return 0;
 388
 389         sdata_info(sdata,
 390                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 391                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 392                    chandef.center_freq1, chandef.center_freq2);
 393
 394         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 395                                       IEEE80211_STA_DISABLE_VHT |
 396                                       IEEE80211_STA_DISABLE_40MHZ |
 397                                       IEEE80211_STA_DISABLE_80P80MHZ |
 398                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 399             !cfg80211_chandef_valid(&chandef)) {
 400                 sdata_info(sdata,
 401                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 402                            ifmgd->bssid);
 403                 return -EINVAL;
 404         }
 405
 406         switch (chandef.width) {
 407         case NL80211_CHAN_WIDTH_20_NOHT:
 408         case NL80211_CHAN_WIDTH_20:
 409                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 410                 break;
 411         case NL80211_CHAN_WIDTH_40:
 412                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 413                 break;
 414         case NL80211_CHAN_WIDTH_80:
 415                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 416                 break;
 417         case NL80211_CHAN_WIDTH_80P80:
 418         case NL80211_CHAN_WIDTH_160:
 419                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 420                 break;
 421         default:
 422                 return -EINVAL;
 423         }
 424
 425         if (new_sta_bw > sta->cur_max_bandwidth)
 426                 new_sta_bw = sta->cur_max_bandwidth;
 427
 428         if (new_sta_bw < sta->sta.bandwidth) {
 429                 sta->sta.bandwidth = new_sta_bw;
 430                 rate_control_rate_update(local, sband, sta,
 431                                          IEEE80211_RC_BW_CHANGED);
 432         }
 433
 434         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 435         if (ret) {
 436                 sdata_info(sdata,
 437                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 438                            ifmgd->bssid);
 439                 return ret;
 440         }
 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         return 0;
 449 }
 450
 451 /* frame sending functions */
 452
 453 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 454                                 struct sk_buff *skb, u8 ap_ht_param,
 455                                 struct ieee80211_supported_band *sband,
 456                                 struct ieee80211_channel *channel,
 457                                 enum ieee80211_smps_mode smps)
 458 {
 459         u8 *pos;
 460         u32 flags = channel->flags;
 461         u16 cap;
 462         struct ieee80211_sta_ht_cap ht_cap;
 463
 464         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 465
 466         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 467         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 468
 469         /* determine capability flags */
 470         cap = ht_cap.cap;
 471
 472         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 473         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 474                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 475                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 476                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 477                 }
 478                 break;
 479         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 480                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 481                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 482                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 483                 }
 484                 break;
 485         }
 486
 487         /*
 488          * If 40 MHz was disabled associate as though we weren't
 489          * capable of 40 MHz -- some broken APs will never fall
 490          * back to trying to transmit in 20 MHz.
 491          */
 492         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 493                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 494                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 495         }
 496
 497         /* set SM PS mode properly */
 498         cap &= ~IEEE80211_HT_CAP_SM_PS;
 499         switch (smps) {
 500         case IEEE80211_SMPS_AUTOMATIC:
 501         case IEEE80211_SMPS_NUM_MODES:
 502                 WARN_ON(1);
 503                 /* fall through */
 504         case IEEE80211_SMPS_OFF:
 505                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 506                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 507                 break;
 508         case IEEE80211_SMPS_STATIC:
 509                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 510                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 511                 break;
 512         case IEEE80211_SMPS_DYNAMIC:
 513                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 514                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 515                 break;
 516         }
 517
 518         /* reserve and fill IE */
 519         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 520         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 521 }
 522
 523 /* This function determines vht capability flags for the association
 524  * and builds the IE.
 525  * Note - the function may set the owner of the MU-MIMO capability
 526  */
 527 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 528                                  struct sk_buff *skb,
 529                                  struct ieee80211_supported_band *sband,
 530                                  struct ieee80211_vht_cap *ap_vht_cap)
 531 {
 532         struct ieee80211_local *local = sdata->local;
 533         u8 *pos;
 534         u32 cap;
 535         struct ieee80211_sta_vht_cap vht_cap;
 536         u32 mask, ap_bf_sts, our_bf_sts;
 537
 538         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 539
 540         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 541         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 542
 543         /* determine capability flags */
 544         cap = vht_cap.cap;
 545
 546         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 547                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 548
 549                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 550                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 551                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 552                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 553         }
 554
 555         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 556                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 557                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 558         }
 559
 560         /*
 561          * Some APs apparently get confused if our capabilities are better
 562          * than theirs, so restrict what we advertise in the assoc request.
 563          */
 564         if (!(ap_vht_cap->vht_cap_info &
 565                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 566                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 567                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 568         else if (!(ap_vht_cap->vht_cap_info &
 569                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 570                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 571
 572         /*
 573          * If some other vif is using the MU-MIMO capablity we cannot associate
 574          * using MU-MIMO - this will lead to contradictions in the group-id
 575          * mechanism.
 576          * Ownership is defined since association request, in order to avoid
 577          * simultaneous associations with MU-MIMO.
 578          */
 579         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 580                 bool disable_mu_mimo = false;
 581                 struct ieee80211_sub_if_data *other;
 582
 583                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 584                         if (other->vif.mu_mimo_owner) {
 585                                 disable_mu_mimo = true;
 586                                 break;
 587                         }
 588                 }
 589                 if (disable_mu_mimo)
 590                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 591                 else
 592                         sdata->vif.mu_mimo_owner = true;
 593         }
 594
 595         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 596
 597         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 598         our_bf_sts = cap & mask;
 599
 600         if (ap_bf_sts < our_bf_sts) {
 601                 cap &= ~mask;
 602                 cap |= ap_bf_sts;
 603         }
 604
 605         /* reserve and fill IE */
 606         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 607         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 608 }
 609
 610 /* This function determines HE capability flags for the association
 611  * and builds the IE.
 612  */
 613 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
 614                                 struct sk_buff *skb,
 615                                 struct ieee80211_supported_band *sband)
 616 {
 617         u8 *pos;
 618         const struct ieee80211_sta_he_cap *he_cap = NULL;
 619         u8 he_cap_size;
 620
 621         he_cap = ieee80211_get_he_sta_cap(sband);
 622         if (!he_cap)
 623                 return;
 624
 625         /*
 626          * TODO: the 1 added is because this temporarily is under the EXTENSION
 627          * IE. Get rid of it when it moves.
 628          */
 629         he_cap_size =
 630                 2 + 1 + sizeof(he_cap->he_cap_elem) +
 631                 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
 632                 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
 633                                       he_cap->he_cap_elem.phy_cap_info);
 634         pos = skb_put(skb, he_cap_size);
 635         ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
 636 }
 637
 638 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 639 {
 640         struct ieee80211_local *local = sdata->local;
 641         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 642         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 643         struct sk_buff *skb;
 644         struct ieee80211_mgmt *mgmt;
 645         u8 *pos, qos_info;
 646         size_t offset = 0, noffset;
 647         int i, count, rates_len, supp_rates_len, shift;
 648         u16 capab;
 649         struct ieee80211_supported_band *sband;
 650         struct ieee80211_chanctx_conf *chanctx_conf;
 651         struct ieee80211_channel *chan;
 652         u32 rates = 0;
 653
 654         sdata_assert_lock(sdata);
 655
 656         rcu_read_lock();
 657         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 658         if (WARN_ON(!chanctx_conf)) {
 659                 rcu_read_unlock();
 660                 return;
 661         }
 662         chan = chanctx_conf->def.chan;
 663         rcu_read_unlock();
 664         sband = local->hw.wiphy->bands[chan->band];
 665         shift = ieee80211_vif_get_shift(&sdata->vif);
 666
 667         if (assoc_data->supp_rates_len) {
 668                 /*
 669                  * Get all rates supported by the device and the AP as
 670                  * some APs don't like getting a superset of their rates
 671                  * in the association request (e.g. D-Link DAP 1353 in
 672                  * b-only mode)...
 673                  */
 674                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 675                                                      assoc_data->supp_rates,
 676                                                      assoc_data->supp_rates_len,
 677                                                      &rates);
 678         } else {
 679                 /*
 680                  * In case AP not provide any supported rates information
 681                  * before association, we send information element(s) with
 682                  * all rates that we support.
 683                  */
 684                 rates_len = 0;
 685                 for (i = 0; i < sband->n_bitrates; i++) {
 686                         rates |= BIT(i);
 687                         rates_len++;
 688                 }
 689         }
 690
 691         skb = alloc_skb(local->hw.extra_tx_headroom +
 692                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 693                         2 + assoc_data->ssid_len + /* SSID */
 694                         4 + rates_len + /* (extended) rates */
 695                         4 + /* power capability */
 696                         2 + 2 * sband->n_channels + /* supported channels */
 697                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 698                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 699                         2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
 700                                 sizeof(struct ieee80211_he_mcs_nss_supp) +
 701                                 IEEE80211_HE_PPE_THRES_MAX_LEN +
 702                         assoc_data->ie_len + /* extra IEs */
 703                         (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
 704                         9, /* WMM */
 705                         GFP_KERNEL);
 706         if (!skb)
 707                 return;
 708
 709         skb_reserve(skb, local->hw.extra_tx_headroom);
 710
 711         capab = WLAN_CAPABILITY_ESS;
 712
 713         if (sband->band == NL80211_BAND_2GHZ) {
 714                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 715                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 716         }
 717
 718         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 719                 capab |= WLAN_CAPABILITY_PRIVACY;
 720
 721         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 722             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 723                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 724
 725         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 726                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 727
 728         mgmt = skb_put_zero(skb, 24);
 729         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 730         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 731         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 732
 733         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 734                 skb_put(skb, 10);
 735                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 736                                                   IEEE80211_STYPE_REASSOC_REQ);
 737                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 738                 mgmt->u.reassoc_req.listen_interval =
 739                                 cpu_to_le16(local->hw.conf.listen_interval);
 740                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 741                        ETH_ALEN);
 742         } else {
 743                 skb_put(skb, 4);
 744                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 745                                                   IEEE80211_STYPE_ASSOC_REQ);
 746                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 747                 mgmt->u.assoc_req.listen_interval =
 748                                 cpu_to_le16(local->hw.conf.listen_interval);
 749         }
 750
 751         /* SSID */
 752         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 753         *pos++ = WLAN_EID_SSID;
 754         *pos++ = assoc_data->ssid_len;
 755         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 756
 757         /* add all rates which were marked to be used above */
 758         supp_rates_len = rates_len;
 759         if (supp_rates_len > 8)
 760                 supp_rates_len = 8;
 761
 762         pos = skb_put(skb, supp_rates_len + 2);
 763         *pos++ = WLAN_EID_SUPP_RATES;
 764         *pos++ = supp_rates_len;
 765
 766         count = 0;
 767         for (i = 0; i < sband->n_bitrates; i++) {
 768                 if (BIT(i) & rates) {
 769                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 770                                                 5 * (1 << shift));
 771                         *pos++ = (u8) rate;
 772                         if (++count == 8)
 773                                 break;
 774                 }
 775         }
 776
 777         if (rates_len > count) {
 778                 pos = skb_put(skb, rates_len - count + 2);
 779                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 780                 *pos++ = rates_len - count;
 781
 782                 for (i++; i < sband->n_bitrates; i++) {
 783                         if (BIT(i) & rates) {
 784                                 int rate;
 785                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 786                                                     5 * (1 << shift));
 787                                 *pos++ = (u8) rate;
 788                         }
 789                 }
 790         }
 791
 792         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 793             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 794                 pos = skb_put(skb, 4);
 795                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 796                 *pos++ = 2;
 797                 *pos++ = 0; /* min tx power */
 798                  /* max tx power */
 799                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 800         }
 801
 802         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 803                 /* TODO: get this in reg domain format */
 804                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 805                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 806                 *pos++ = 2 * sband->n_channels;
 807                 for (i = 0; i < sband->n_channels; i++) {
 808                         *pos++ = ieee80211_frequency_to_channel(
 809                                         sband->channels[i].center_freq);
 810                         *pos++ = 1; /* one channel in the subband*/
 811                 }
 812         }
 813
 814         /* if present, add any custom IEs that go before HT */
 815         if (assoc_data->ie_len) {
 816                 static const u8 before_ht[] = {
 817                         WLAN_EID_SSID,
 818                         WLAN_EID_SUPP_RATES,
 819                         WLAN_EID_EXT_SUPP_RATES,
 820                         WLAN_EID_PWR_CAPABILITY,
 821                         WLAN_EID_SUPPORTED_CHANNELS,
 822                         WLAN_EID_RSN,
 823                         WLAN_EID_QOS_CAPA,
 824                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 825                         WLAN_EID_MOBILITY_DOMAIN,
 826                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 827                         WLAN_EID_RIC_DATA,              /* reassoc only */
 828                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 829                 };
 830                 static const u8 after_ric[] = {
 831                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 832                         WLAN_EID_HT_CAPABILITY,
 833                         WLAN_EID_BSS_COEX_2040,
 834                         /* luckily this is almost always there */
 835                         WLAN_EID_EXT_CAPABILITY,
 836                         WLAN_EID_QOS_TRAFFIC_CAPA,
 837                         WLAN_EID_TIM_BCAST_REQ,
 838                         WLAN_EID_INTERWORKING,
 839                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
 840                         WLAN_EID_VHT_CAPABILITY,
 841                         WLAN_EID_OPMODE_NOTIF,
 842                 };
 843
 844                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 845                                                  assoc_data->ie_len,
 846                                                  before_ht,
 847                                                  ARRAY_SIZE(before_ht),
 848                                                  after_ric,
 849                                                  ARRAY_SIZE(after_ric),
 850                                                  offset);
 851                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 852                 offset = noffset;
 853         }
 854
 855         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 856                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 857                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 858
 859         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 860                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 861                                     sband, chan, sdata->smps_mode);
 862
 863         /* if present, add any custom IEs that go before VHT */
 864         if (assoc_data->ie_len) {
 865                 static const u8 before_vht[] = {
 866                         /*
 867                          * no need to list the ones split off before HT
 868                          * or generated here
 869                          */
 870                         WLAN_EID_BSS_COEX_2040,
 871                         WLAN_EID_EXT_CAPABILITY,
 872                         WLAN_EID_QOS_TRAFFIC_CAPA,
 873                         WLAN_EID_TIM_BCAST_REQ,
 874                         WLAN_EID_INTERWORKING,
 875                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
 876                 };
 877
 878                 /* RIC already taken above, so no need to handle here anymore */
 879                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 880                                              before_vht, ARRAY_SIZE(before_vht),
 881                                              offset);
 882                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 883                 offset = noffset;
 884         }
 885
 886         /* if present, add any custom IEs that go before HE */
 887         if (assoc_data->ie_len) {
 888                 static const u8 before_he[] = {
 889                         /*
 890                          * no need to list the ones split off before VHT
 891                          * or generated here
 892                          */
 893                         WLAN_EID_OPMODE_NOTIF,
 894                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
 895                         /* 11ai elements */
 896                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
 897                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
 898                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
 899                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
 900                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
 901                         /* TODO: add 11ah/11aj/11ak elements */
 902                 };
 903
 904                 /* RIC already taken above, so no need to handle here anymore */
 905                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 906                                              before_he, ARRAY_SIZE(before_he),
 907                                              offset);
 908                 pos = skb_put(skb, noffset - offset);
 909                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 910                 offset = noffset;
 911         }
 912
 913         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 914                 ieee80211_add_vht_ie(sdata, skb, sband,
 915                                      &assoc_data->ap_vht_cap);
 916
 917         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
 918                 ieee80211_add_he_ie(sdata, skb, sband);
 919
 920         /* if present, add any custom non-vendor IEs that go after HE */
 921         if (assoc_data->ie_len) {
 922                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 923                                                     assoc_data->ie_len,
 924                                                     offset);
 925                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 926                 offset = noffset;
 927         }
 928
 929         if (assoc_data->wmm) {
 930                 if (assoc_data->uapsd) {
 931                         qos_info = ifmgd->uapsd_queues;
 932                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 933                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 934                 } else {
 935                         qos_info = 0;
 936                 }
 937
 938                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 939         }
 940
 941         /* add any remaining custom (i.e. vendor specific here) IEs */
 942         if (assoc_data->ie_len) {
 943                 noffset = assoc_data->ie_len;
 944                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 945         }
 946
 947         if (assoc_data->fils_kek_len &&
 948             fils_encrypt_assoc_req(skb, assoc_data) < 0) {
 949                 dev_kfree_skb(skb);
 950                 return;
 951         }
 952
 953         drv_mgd_prepare_tx(local, sdata, 0);
 954
 955         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 956         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 957                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 958                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 959         ieee80211_tx_skb(sdata, skb);
 960 }
 961
 962 void ieee80211_send_pspoll(struct ieee80211_local *local,
 963                            struct ieee80211_sub_if_data *sdata)
 964 {
 965         struct ieee80211_pspoll *pspoll;
 966         struct sk_buff *skb;
 967
 968         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 969         if (!skb)
 970                 return;
 971
 972         pspoll = (struct ieee80211_pspoll *) skb->data;
 973         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 974
 975         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 976         ieee80211_tx_skb(sdata, skb);
 977 }
 978
 979 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 980                              struct ieee80211_sub_if_data *sdata,
 981                              bool powersave)
 982 {
 983         struct sk_buff *skb;
 984         struct ieee80211_hdr_3addr *nullfunc;
 985         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 986
 987         /* Don't send NDPs when STA is connected HE */
 988         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
 989             !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
 990                 return;
 991
 992         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
 993                 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
 994         if (!skb)
 995                 return;
 996
 997         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 998         if (powersave)
 999                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1000
1001         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1002                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1003
1004         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1005                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1006
1007         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1008                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1009
1010         ieee80211_tx_skb(sdata, skb);
1011 }
1012
1013 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1014                                           struct ieee80211_sub_if_data *sdata)
1015 {
1016         struct sk_buff *skb;
1017         struct ieee80211_hdr *nullfunc;
1018         __le16 fc;
1019
1020         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1021                 return;
1022
1023         /* Don't send NDPs when connected HE */
1024         if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1025                 return;
1026
1027         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1028         if (!skb)
1029                 return;
1030
1031         skb_reserve(skb, local->hw.extra_tx_headroom);
1032
1033         nullfunc = skb_put_zero(skb, 30);
1034         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1035                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1036         nullfunc->frame_control = fc;
1037         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1038         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1039         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1040         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1041
1042         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1043         ieee80211_tx_skb(sdata, skb);
1044 }
1045
1046 /* spectrum management related things */
1047 static void ieee80211_chswitch_work(struct work_struct *work)
1048 {
1049         struct ieee80211_sub_if_data *sdata =
1050                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1051         struct ieee80211_local *local = sdata->local;
1052         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1053         int ret;
1054
1055         if (!ieee80211_sdata_running(sdata))
1056                 return;
1057
1058         sdata_lock(sdata);
1059         mutex_lock(&local->mtx);
1060         mutex_lock(&local->chanctx_mtx);
1061
1062         if (!ifmgd->associated)
1063                 goto out;
1064
1065         if (!sdata->vif.csa_active)
1066                 goto out;
1067
1068         /*
1069          * using reservation isn't immediate as it may be deferred until later
1070          * with multi-vif. once reservation is complete it will re-schedule the
1071          * work with no reserved_chanctx so verify chandef to check if it
1072          * completed successfully
1073          */
1074
1075         if (sdata->reserved_chanctx) {
1076                 struct ieee80211_supported_band *sband = NULL;
1077                 struct sta_info *mgd_sta = NULL;
1078                 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1079
1080                 /*
1081                  * with multi-vif csa driver may call ieee80211_csa_finish()
1082                  * many times while waiting for other interfaces to use their
1083                  * reservations
1084                  */
1085                 if (sdata->reserved_ready)
1086                         goto out;
1087
1088                 if (sdata->vif.bss_conf.chandef.width !=
1089                     sdata->csa_chandef.width) {
1090                         /*
1091                          * For managed interface, we need to also update the AP
1092                          * station bandwidth and align the rate scale algorithm
1093                          * on the bandwidth change. Here we only consider the
1094                          * bandwidth of the new channel definition (as channel
1095                          * switch flow does not have the full HT/VHT/HE
1096                          * information), assuming that if additional changes are
1097                          * required they would be done as part of the processing
1098                          * of the next beacon from the AP.
1099                          */
1100                         switch (sdata->csa_chandef.width) {
1101                         case NL80211_CHAN_WIDTH_20_NOHT:
1102                         case NL80211_CHAN_WIDTH_20:
1103                         default:
1104                                 bw = IEEE80211_STA_RX_BW_20;
1105                                 break;
1106                         case NL80211_CHAN_WIDTH_40:
1107                                 bw = IEEE80211_STA_RX_BW_40;
1108                                 break;
1109                         case NL80211_CHAN_WIDTH_80:
1110                                 bw = IEEE80211_STA_RX_BW_80;
1111                                 break;
1112                         case NL80211_CHAN_WIDTH_80P80:
1113                         case NL80211_CHAN_WIDTH_160:
1114                                 bw = IEEE80211_STA_RX_BW_160;
1115                                 break;
1116                         }
1117
1118                         mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1119                         sband =
1120                                 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1121                 }
1122
1123                 if (sdata->vif.bss_conf.chandef.width >
1124                     sdata->csa_chandef.width) {
1125                         mgd_sta->sta.bandwidth = bw;
1126                         rate_control_rate_update(local, sband, mgd_sta,
1127                                                  IEEE80211_RC_BW_CHANGED);
1128                 }
1129
1130                 ret = ieee80211_vif_use_reserved_context(sdata);
1131                 if (ret) {
1132                         sdata_info(sdata,
1133                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1134                                    ret);
1135                         ieee80211_queue_work(&sdata->local->hw,
1136                                              &ifmgd->csa_connection_drop_work);
1137                         goto out;
1138                 }
1139
1140                 if (sdata->vif.bss_conf.chandef.width <
1141                     sdata->csa_chandef.width) {
1142                         mgd_sta->sta.bandwidth = bw;
1143                         rate_control_rate_update(local, sband, mgd_sta,
1144                                                  IEEE80211_RC_BW_CHANGED);
1145                 }
1146
1147                 goto out;
1148         }
1149
1150         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1151                                         &sdata->csa_chandef)) {
1152                 sdata_info(sdata,
1153                            "failed to finalize channel switch, disconnecting\n");
1154                 ieee80211_queue_work(&sdata->local->hw,
1155                                      &ifmgd->csa_connection_drop_work);
1156                 goto out;
1157         }
1158
1159         ifmgd->csa_waiting_bcn = true;
1160
1161         ieee80211_sta_reset_beacon_monitor(sdata);
1162         ieee80211_sta_reset_conn_monitor(sdata);
1163
1164 out:
1165         mutex_unlock(&local->chanctx_mtx);
1166         mutex_unlock(&local->mtx);
1167         sdata_unlock(sdata);
1168 }
1169
1170 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1171 {
1172         struct ieee80211_local *local = sdata->local;
1173         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1174         int ret;
1175
1176         sdata_assert_lock(sdata);
1177
1178         WARN_ON(!sdata->vif.csa_active);
1179
1180         if (sdata->csa_block_tx) {
1181                 ieee80211_wake_vif_queues(local, sdata,
1182                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1183                 sdata->csa_block_tx = false;
1184         }
1185
1186         sdata->vif.csa_active = false;
1187         ifmgd->csa_waiting_bcn = false;
1188         /*
1189          * If the CSA IE is still present on the beacon after the switch,
1190          * we need to consider it as a new CSA (possibly to self).
1191          */
1192         ifmgd->beacon_crc_valid = false;
1193
1194         ret = drv_post_channel_switch(sdata);
1195         if (ret) {
1196                 sdata_info(sdata,
1197                            "driver post channel switch failed, disconnecting\n");
1198                 ieee80211_queue_work(&local->hw,
1199                                      &ifmgd->csa_connection_drop_work);
1200                 return;
1201         }
1202
1203         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1204 }
1205
1206 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1207 {
1208         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1209         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1210
1211         trace_api_chswitch_done(sdata, success);
1212         if (!success) {
1213                 sdata_info(sdata,
1214                            "driver channel switch failed, disconnecting\n");
1215                 ieee80211_queue_work(&sdata->local->hw,
1216                                      &ifmgd->csa_connection_drop_work);
1217         } else {
1218                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1219         }
1220 }
1221 EXPORT_SYMBOL(ieee80211_chswitch_done);
1222
1223 static void ieee80211_chswitch_timer(struct timer_list *t)
1224 {
1225         struct ieee80211_sub_if_data *sdata =
1226                 from_timer(sdata, t, u.mgd.chswitch_timer);
1227
1228         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1229 }
1230
1231 static void
1232 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1233                                  u64 timestamp, u32 device_timestamp,
1234                                  struct ieee802_11_elems *elems,
1235                                  bool beacon)
1236 {
1237         struct ieee80211_local *local = sdata->local;
1238         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1239         struct cfg80211_bss *cbss = ifmgd->associated;
1240         struct ieee80211_chanctx_conf *conf;
1241         struct ieee80211_chanctx *chanctx;
1242         enum nl80211_band current_band;
1243         struct ieee80211_csa_ie csa_ie;
1244         struct ieee80211_channel_switch ch_switch;
1245         int res;
1246
1247         sdata_assert_lock(sdata);
1248
1249         if (!cbss)
1250                 return;
1251
1252         if (local->scanning)
1253                 return;
1254
1255         /* disregard subsequent announcements if we are already processing */
1256         if (sdata->vif.csa_active)
1257                 return;
1258
1259         current_band = cbss->channel->band;
1260         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1261                                            ifmgd->flags,
1262                                            ifmgd->associated->bssid, &csa_ie);
1263         if (res < 0)
1264                 ieee80211_queue_work(&local->hw,
1265                                      &ifmgd->csa_connection_drop_work);
1266         if (res)
1267                 return;
1268
1269         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1270                                      IEEE80211_CHAN_DISABLED)) {
1271                 sdata_info(sdata,
1272                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1273                            ifmgd->associated->bssid,
1274                            csa_ie.chandef.chan->center_freq,
1275                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1276                            csa_ie.chandef.center_freq2);
1277                 ieee80211_queue_work(&local->hw,
1278                                      &ifmgd->csa_connection_drop_work);
1279                 return;
1280         }
1281
1282         if (cfg80211_chandef_identical(&csa_ie.chandef,
1283                                        &sdata->vif.bss_conf.chandef)) {
1284                 if (ifmgd->csa_ignored_same_chan)
1285                         return;
1286                 sdata_info(sdata,
1287                            "AP %pM tries to chanswitch to same channel, ignore\n",
1288                            ifmgd->associated->bssid);
1289                 ifmgd->csa_ignored_same_chan = true;
1290                 return;
1291         }
1292
1293         /*
1294          * Drop all TDLS peers - either we disconnect or move to a different
1295          * channel from this point on. There's no telling what our peer will do.
1296          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1297          * have an incompatible wider chandef.
1298          */
1299         ieee80211_teardown_tdls_peers(sdata);
1300
1301         mutex_lock(&local->mtx);
1302         mutex_lock(&local->chanctx_mtx);
1303         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1304                                          lockdep_is_held(&local->chanctx_mtx));
1305         if (!conf) {
1306                 sdata_info(sdata,
1307                            "no channel context assigned to vif?, disconnecting\n");
1308                 goto drop_connection;
1309         }
1310
1311         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1312
1313         if (local->use_chanctx &&
1314             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1315                 sdata_info(sdata,
1316                            "driver doesn't support chan-switch with channel contexts\n");
1317                 goto drop_connection;
1318         }
1319
1320         ch_switch.timestamp = timestamp;
1321         ch_switch.device_timestamp = device_timestamp;
1322         ch_switch.block_tx = csa_ie.mode;
1323         ch_switch.chandef = csa_ie.chandef;
1324         ch_switch.count = csa_ie.count;
1325
1326         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1327                 sdata_info(sdata,
1328                            "preparing for channel switch failed, disconnecting\n");
1329                 goto drop_connection;
1330         }
1331
1332         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1333                                             chanctx->mode, false);
1334         if (res) {
1335                 sdata_info(sdata,
1336                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1337                            res);
1338                 goto drop_connection;
1339         }
1340         mutex_unlock(&local->chanctx_mtx);
1341
1342         sdata->vif.csa_active = true;
1343         sdata->csa_chandef = csa_ie.chandef;
1344         sdata->csa_block_tx = csa_ie.mode;
1345         ifmgd->csa_ignored_same_chan = false;
1346
1347         if (sdata->csa_block_tx)
1348                 ieee80211_stop_vif_queues(local, sdata,
1349                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1350         mutex_unlock(&local->mtx);
1351
1352         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1353                                           csa_ie.count);
1354
1355         if (local->ops->channel_switch) {
1356                 /* use driver's channel switch callback */
1357                 drv_channel_switch(local, sdata, &ch_switch);
1358                 return;
1359         }
1360
1361         /* channel switch handled in software */
1362         if (csa_ie.count <= 1)
1363                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1364         else
1365                 mod_timer(&ifmgd->chswitch_timer,
1366                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1367                                          cbss->beacon_interval));
1368         return;
1369  drop_connection:
1370         /*
1371          * This is just so that the disconnect flow will know that
1372          * we were trying to switch channel and failed. In case the
1373          * mode is 1 (we are not allowed to Tx), we will know not to
1374          * send a deauthentication frame. Those two fields will be
1375          * reset when the disconnection worker runs.
1376          */
1377         sdata->vif.csa_active = true;
1378         sdata->csa_block_tx = csa_ie.mode;
1379
1380         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1381         mutex_unlock(&local->chanctx_mtx);
1382         mutex_unlock(&local->mtx);
1383 }
1384
1385 static bool
1386 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1387                                  struct ieee80211_channel *channel,
1388                                  const u8 *country_ie, u8 country_ie_len,
1389                                  const u8 *pwr_constr_elem,
1390                                  int *chan_pwr, int *pwr_reduction)
1391 {
1392         struct ieee80211_country_ie_triplet *triplet;
1393         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1394         int i, chan_increment;
1395         bool have_chan_pwr = false;
1396
1397         /* Invalid IE */
1398         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1399                 return false;
1400
1401         triplet = (void *)(country_ie + 3);
1402         country_ie_len -= 3;
1403
1404         switch (channel->band) {
1405         default:
1406                 WARN_ON_ONCE(1);
1407                 /* fall through */
1408         case NL80211_BAND_2GHZ:
1409         case NL80211_BAND_60GHZ:
1410                 chan_increment = 1;
1411                 break;
1412         case NL80211_BAND_5GHZ:
1413                 chan_increment = 4;
1414                 break;
1415         }
1416
1417         /* find channel */
1418         while (country_ie_len >= 3) {
1419                 u8 first_channel = triplet->chans.first_channel;
1420
1421                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1422                         goto next;
1423
1424                 for (i = 0; i < triplet->chans.num_channels; i++) {
1425                         if (first_channel + i * chan_increment == chan) {
1426                                 have_chan_pwr = true;
1427                                 *chan_pwr = triplet->chans.max_power;
1428                                 break;
1429                         }
1430                 }
1431                 if (have_chan_pwr)
1432                         break;
1433
1434  next:
1435                 triplet++;
1436                 country_ie_len -= 3;
1437         }
1438
1439         if (have_chan_pwr && pwr_constr_elem)
1440                 *pwr_reduction = *pwr_constr_elem;
1441         else
1442                 *pwr_reduction = 0;
1443
1444         return have_chan_pwr;
1445 }
1446
1447 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1448                                       struct ieee80211_channel *channel,
1449                                       const u8 *cisco_dtpc_ie,
1450                                       int *pwr_level)
1451 {
1452         /* From practical testing, the first data byte of the DTPC element
1453          * seems to contain the requested dBm level, and the CLI on Cisco
1454          * APs clearly state the range is -127 to 127 dBm, which indicates
1455          * a signed byte, although it seemingly never actually goes negative.
1456          * The other byte seems to always be zero.
1457          */
1458         *pwr_level = (__s8)cisco_dtpc_ie[4];
1459 }
1460
1461 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1462                                        struct ieee80211_channel *channel,
1463                                        struct ieee80211_mgmt *mgmt,
1464                                        const u8 *country_ie, u8 country_ie_len,
1465                                        const u8 *pwr_constr_ie,
1466                                        const u8 *cisco_dtpc_ie)
1467 {
1468         bool has_80211h_pwr = false, has_cisco_pwr = false;
1469         int chan_pwr = 0, pwr_reduction_80211h = 0;
1470         int pwr_level_cisco, pwr_level_80211h;
1471         int new_ap_level;
1472         __le16 capab = mgmt->u.probe_resp.capab_info;
1473
1474         if (country_ie &&
1475             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1476              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1477                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1478                         sdata, channel, country_ie, country_ie_len,
1479                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1480                 pwr_level_80211h =
1481                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1482         }
1483
1484         if (cisco_dtpc_ie) {
1485                 ieee80211_find_cisco_dtpc(
1486                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1487                 has_cisco_pwr = true;
1488         }
1489
1490         if (!has_80211h_pwr && !has_cisco_pwr)
1491                 return 0;
1492
1493         /* If we have both 802.11h and Cisco DTPC, apply both limits
1494          * by picking the smallest of the two power levels advertised.
1495          */
1496         if (has_80211h_pwr &&
1497             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1498                 new_ap_level = pwr_level_80211h;
1499
1500                 if (sdata->ap_power_level == new_ap_level)
1501                         return 0;
1502
1503                 sdata_dbg(sdata,
1504                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1505                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1506                           sdata->u.mgd.bssid);
1507         } else {  /* has_cisco_pwr is always true here. */
1508                 new_ap_level = pwr_level_cisco;
1509
1510                 if (sdata->ap_power_level == new_ap_level)
1511                         return 0;
1512
1513                 sdata_dbg(sdata,
1514                           "Limiting TX power to %d dBm as advertised by %pM\n",
1515                           pwr_level_cisco, sdata->u.mgd.bssid);
1516         }
1517
1518         sdata->ap_power_level = new_ap_level;
1519         if (__ieee80211_recalc_txpower(sdata))
1520                 return BSS_CHANGED_TXPOWER;
1521         return 0;
1522 }
1523
1524 /* powersave */
1525 static void ieee80211_enable_ps(struct ieee80211_local *local,
1526                                 struct ieee80211_sub_if_data *sdata)
1527 {
1528         struct ieee80211_conf *conf = &local->hw.conf;
1529
1530         /*
1531          * If we are scanning right now then the parameters will
1532          * take effect when scan finishes.
1533          */
1534         if (local->scanning)
1535                 return;
1536
1537         if (conf->dynamic_ps_timeout > 0 &&
1538             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1539                 mod_timer(&local->dynamic_ps_timer, jiffies +
1540                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1541         } else {
1542                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1543                         ieee80211_send_nullfunc(local, sdata, true);
1544
1545                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1546                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1547                         return;
1548
1549                 conf->flags |= IEEE80211_CONF_PS;
1550                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1551         }
1552 }
1553
1554 static void ieee80211_change_ps(struct ieee80211_local *local)
1555 {
1556         struct ieee80211_conf *conf = &local->hw.conf;
1557
1558         if (local->ps_sdata) {
1559                 ieee80211_enable_ps(local, local->ps_sdata);
1560         } else if (conf->flags & IEEE80211_CONF_PS) {
1561                 conf->flags &= ~IEEE80211_CONF_PS;
1562                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1563                 del_timer_sync(&local->dynamic_ps_timer);
1564                 cancel_work_sync(&local->dynamic_ps_enable_work);
1565         }
1566 }
1567
1568 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1569 {
1570         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1571         struct sta_info *sta = NULL;
1572         bool authorized = false;
1573
1574         if (!mgd->powersave)
1575                 return false;
1576
1577         if (mgd->broken_ap)
1578                 return false;
1579
1580         if (!mgd->associated)
1581                 return false;
1582
1583         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1584                 return false;
1585
1586         if (!mgd->have_beacon)
1587                 return false;
1588
1589         rcu_read_lock();
1590         sta = sta_info_get(sdata, mgd->bssid);
1591         if (sta)
1592                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1593         rcu_read_unlock();
1594
1595         return authorized;
1596 }
1597
1598 /* need to hold RTNL or interface lock */
1599 void ieee80211_recalc_ps(struct ieee80211_local *local)
1600 {
1601         struct ieee80211_sub_if_data *sdata, *found = NULL;
1602         int count = 0;
1603         int timeout;
1604
1605         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1606                 local->ps_sdata = NULL;
1607                 return;
1608         }
1609
1610         list_for_each_entry(sdata, &local->interfaces, list) {
1611                 if (!ieee80211_sdata_running(sdata))
1612                         continue;
1613                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1614                         /* If an AP vif is found, then disable PS
1615                          * by setting the count to zero thereby setting
1616                          * ps_sdata to NULL.
1617                          */
1618                         count = 0;
1619                         break;
1620                 }
1621                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1622                         continue;
1623                 found = sdata;
1624                 count++;
1625         }
1626
1627         if (count == 1 && ieee80211_powersave_allowed(found)) {
1628                 u8 dtimper = found->u.mgd.dtim_period;
1629
1630                 timeout = local->dynamic_ps_forced_timeout;
1631                 if (timeout < 0)
1632                         timeout = 100;
1633                 local->hw.conf.dynamic_ps_timeout = timeout;
1634
1635                 /* If the TIM IE is invalid, pretend the value is 1 */
1636                 if (!dtimper)
1637                         dtimper = 1;
1638
1639                 local->hw.conf.ps_dtim_period = dtimper;
1640                 local->ps_sdata = found;
1641         } else {
1642                 local->ps_sdata = NULL;
1643         }
1644
1645         ieee80211_change_ps(local);
1646 }
1647
1648 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1649 {
1650         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1651
1652         if (sdata->vif.bss_conf.ps != ps_allowed) {
1653                 sdata->vif.bss_conf.ps = ps_allowed;
1654                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1655         }
1656 }
1657
1658 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1659 {
1660         struct ieee80211_local *local =
1661                 container_of(work, struct ieee80211_local,
1662                              dynamic_ps_disable_work);
1663
1664         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1665                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1666                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1667         }
1668
1669         ieee80211_wake_queues_by_reason(&local->hw,
1670                                         IEEE80211_MAX_QUEUE_MAP,
1671                                         IEEE80211_QUEUE_STOP_REASON_PS,
1672                                         false);
1673 }
1674
1675 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1676 {
1677         struct ieee80211_local *local =
1678                 container_of(work, struct ieee80211_local,
1679                              dynamic_ps_enable_work);
1680         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1681         struct ieee80211_if_managed *ifmgd;
1682         unsigned long flags;
1683         int q;
1684
1685         /* can only happen when PS was just disabled anyway */
1686         if (!sdata)
1687                 return;
1688
1689         ifmgd = &sdata->u.mgd;
1690
1691         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1692                 return;
1693
1694         if (local->hw.conf.dynamic_ps_timeout > 0) {
1695                 /* don't enter PS if TX frames are pending */
1696                 if (drv_tx_frames_pending(local)) {
1697                         mod_timer(&local->dynamic_ps_timer, jiffies +
1698                                   msecs_to_jiffies(
1699                                   local->hw.conf.dynamic_ps_timeout));
1700                         return;
1701                 }
1702
1703                 /*
1704                  * transmission can be stopped by others which leads to
1705                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1706                  * is not the actual idle state.
1707                  */
1708                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1709                 for (q = 0; q < local->hw.queues; q++) {
1710                         if (local->queue_stop_reasons[q]) {
1711                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1712                                                        flags);
1713                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1714                                           msecs_to_jiffies(
1715                                           local->hw.conf.dynamic_ps_timeout));
1716                                 return;
1717                         }
1718                 }
1719                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1720         }
1721
1722         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1723             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1724                 if (drv_tx_frames_pending(local)) {
1725                         mod_timer(&local->dynamic_ps_timer, jiffies +
1726                                   msecs_to_jiffies(
1727                                   local->hw.conf.dynamic_ps_timeout));
1728                 } else {
1729                         ieee80211_send_nullfunc(local, sdata, true);
1730                         /* Flush to get the tx status of nullfunc frame */
1731                         ieee80211_flush_queues(local, sdata, false);
1732                 }
1733         }
1734
1735         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1736               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1737             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1738                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1739                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1740                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1741         }
1742 }
1743
1744 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1745 {
1746         struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1747
1748         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1749 }
1750
1751 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1752 {
1753         struct delayed_work *delayed_work = to_delayed_work(work);
1754         struct ieee80211_sub_if_data *sdata =
1755                 container_of(delayed_work, struct ieee80211_sub_if_data,
1756                              dfs_cac_timer_work);
1757         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1758
1759         mutex_lock(&sdata->local->mtx);
1760         if (sdata->wdev.cac_started) {
1761                 ieee80211_vif_release_channel(sdata);
1762                 cfg80211_cac_event(sdata->dev, &chandef,
1763                                    NL80211_RADAR_CAC_FINISHED,
1764                                    GFP_KERNEL);
1765         }
1766         mutex_unlock(&sdata->local->mtx);
1767 }
1768
1769 static bool
1770 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1771 {
1772         struct ieee80211_local *local = sdata->local;
1773         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1774         bool ret = false;
1775         int ac;
1776
1777         if (local->hw.queues < IEEE80211_NUM_ACS)
1778                 return false;
1779
1780         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1781                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1782                 int non_acm_ac;
1783                 unsigned long now = jiffies;
1784
1785                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1786                     tx_tspec->admitted_time &&
1787                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1788                         tx_tspec->consumed_tx_time = 0;
1789                         tx_tspec->time_slice_start = now;
1790
1791                         if (tx_tspec->downgraded)
1792                                 tx_tspec->action =
1793                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1794                 }
1795
1796                 switch (tx_tspec->action) {
1797                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1798                         /* take the original parameters */
1799                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1800                                 sdata_err(sdata,
1801                                           "failed to set TX queue parameters for queue %d\n",
1802                                           ac);
1803                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1804                         tx_tspec->downgraded = false;
1805                         ret = true;
1806                         break;
1807                 case TX_TSPEC_ACTION_DOWNGRADE:
1808                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1809                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1810                                 ret = true;
1811                                 break;
1812                         }
1813                         /* downgrade next lower non-ACM AC */
1814                         for (non_acm_ac = ac + 1;
1815                              non_acm_ac < IEEE80211_NUM_ACS;
1816                              non_acm_ac++)
1817                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1818                                         break;
1819                         /* Usually the loop will result in using BK even if it
1820                          * requires admission control, but such a configuration
1821                          * makes no sense and we have to transmit somehow - the
1822                          * AC selection does the same thing.
1823                          * If we started out trying to downgrade from BK, then
1824                          * the extra condition here might be needed.
1825                          */
1826                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1827                                 non_acm_ac = IEEE80211_AC_BK;
1828                         if (drv_conf_tx(local, sdata, ac,
1829                                         &sdata->tx_conf[non_acm_ac]))
1830                                 sdata_err(sdata,
1831                                           "failed to set TX queue parameters for queue %d\n",
1832                                           ac);
1833                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1834                         ret = true;
1835                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1836                                 tx_tspec->time_slice_start + HZ - now + 1);
1837                         break;
1838                 case TX_TSPEC_ACTION_NONE:
1839                         /* nothing now */
1840                         break;
1841                 }
1842         }
1843
1844         return ret;
1845 }
1846
1847 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1848 {
1849         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1850                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1851 }
1852
1853 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1854 {
1855         struct ieee80211_sub_if_data *sdata;
1856
1857         sdata = container_of(work, struct ieee80211_sub_if_data,
1858                              u.mgd.tx_tspec_wk.work);
1859         ieee80211_sta_handle_tspec_ac_params(sdata);
1860 }
1861
1862 /* MLME */
1863 static bool
1864 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1865                          struct ieee80211_sub_if_data *sdata,
1866                          const u8 *wmm_param, size_t wmm_param_len,
1867                          const struct ieee80211_mu_edca_param_set *mu_edca)
1868 {
1869         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1870         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1871         size_t left;
1872         int count, ac;
1873         const u8 *pos;
1874         u8 uapsd_queues = 0;
1875
1876         if (!local->ops->conf_tx)
1877                 return false;
1878
1879         if (local->hw.queues < IEEE80211_NUM_ACS)
1880                 return false;
1881
1882         if (!wmm_param)
1883                 return false;
1884
1885         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1886                 return false;
1887
1888         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1889                 uapsd_queues = ifmgd->uapsd_queues;
1890
1891         count = wmm_param[6] & 0x0f;
1892         if (count == ifmgd->wmm_last_param_set)
1893                 return false;
1894         ifmgd->wmm_last_param_set = count;
1895
1896         pos = wmm_param + 8;
1897         left = wmm_param_len - 8;
1898
1899         memset(&params, 0, sizeof(params));
1900
1901         sdata->wmm_acm = 0;
1902         for (; left >= 4; left -= 4, pos += 4) {
1903                 int aci = (pos[0] >> 5) & 0x03;
1904                 int acm = (pos[0] >> 4) & 0x01;
1905                 bool uapsd = false;
1906
1907                 switch (aci) {
1908                 case 1: /* AC_BK */
1909                         ac = IEEE80211_AC_BK;
1910                         if (acm)
1911                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1912                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1913                                 uapsd = true;
1914                         params[ac].mu_edca = !!mu_edca;
1915                         if (mu_edca)
1916                                 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
1917                         break;
1918                 case 2: /* AC_VI */
1919                         ac = IEEE80211_AC_VI;
1920                         if (acm)
1921                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1922                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1923                                 uapsd = true;
1924                         params[ac].mu_edca = !!mu_edca;
1925                         if (mu_edca)
1926                                 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
1927                         break;
1928                 case 3: /* AC_VO */
1929                         ac = IEEE80211_AC_VO;
1930                         if (acm)
1931                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1932                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1933                                 uapsd = true;
1934                         params[ac].mu_edca = !!mu_edca;
1935                         if (mu_edca)
1936                                 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
1937                         break;
1938                 case 0: /* AC_BE */
1939                 default:
1940                         ac = IEEE80211_AC_BE;
1941                         if (acm)
1942                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1943                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1944                                 uapsd = true;
1945                         params[ac].mu_edca = !!mu_edca;
1946                         if (mu_edca)
1947                                 params[ac].mu_edca_param_rec = mu_edca->ac_be;
1948                         break;
1949                 }
1950
1951                 params[ac].aifs = pos[0] & 0x0f;
1952
1953                 if (params[ac].aifs < 2) {
1954                         sdata_info(sdata,
1955                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1956                                    params[ac].aifs, aci);
1957                         params[ac].aifs = 2;
1958                 }
1959                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1960                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1961                 params[ac].txop = get_unaligned_le16(pos + 2);
1962                 params[ac].acm = acm;
1963                 params[ac].uapsd = uapsd;
1964
1965                 if (params[ac].cw_min == 0 ||
1966                     params[ac].cw_min > params[ac].cw_max) {
1967                         sdata_info(sdata,
1968                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1969                                    params[ac].cw_min, params[ac].cw_max, aci);
1970                         return false;
1971                 }
1972                 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
1973         }
1974
1975         /* WMM specification requires all 4 ACIs. */
1976         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1977                 if (params[ac].cw_min == 0) {
1978                         sdata_info(sdata,
1979                                    "AP has invalid WMM params (missing AC %d), using defaults\n",
1980                                    ac);
1981                         return false;
1982                 }
1983         }
1984
1985         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1986                 mlme_dbg(sdata,
1987                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1988                          ac, params[ac].acm,
1989                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1990                          params[ac].txop, params[ac].uapsd,
1991                          ifmgd->tx_tspec[ac].downgraded);
1992                 sdata->tx_conf[ac] = params[ac];
1993                 if (!ifmgd->tx_tspec[ac].downgraded &&
1994                     drv_conf_tx(local, sdata, ac, &params[ac]))
1995                         sdata_err(sdata,
1996                                   "failed to set TX queue parameters for AC %d\n",
1997                                   ac);
1998         }
1999
2000         /* enable WMM or activate new settings */
2001         sdata->vif.bss_conf.qos = true;
2002         return true;
2003 }
2004
2005 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2006 {
2007         lockdep_assert_held(&sdata->local->mtx);
2008
2009         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2010         ieee80211_run_deferred_scan(sdata->local);
2011 }
2012
2013 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2014 {
2015         mutex_lock(&sdata->local->mtx);
2016         __ieee80211_stop_poll(sdata);
2017         mutex_unlock(&sdata->local->mtx);
2018 }
2019
2020 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2021                                            u16 capab, bool erp_valid, u8 erp)
2022 {
2023         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2024         struct ieee80211_supported_band *sband;
2025         u32 changed = 0;
2026         bool use_protection;
2027         bool use_short_preamble;
2028         bool use_short_slot;
2029
2030         sband = ieee80211_get_sband(sdata);
2031         if (!sband)
2032                 return changed;
2033
2034         if (erp_valid) {
2035                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2036                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2037         } else {
2038                 use_protection = false;
2039                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2040         }
2041
2042         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2043         if (sband->band == NL80211_BAND_5GHZ)
2044                 use_short_slot = true;
2045
2046         if (use_protection != bss_conf->use_cts_prot) {
2047                 bss_conf->use_cts_prot = use_protection;
2048                 changed |= BSS_CHANGED_ERP_CTS_PROT;
2049         }
2050
2051         if (use_short_preamble != bss_conf->use_short_preamble) {
2052                 bss_conf->use_short_preamble = use_short_preamble;
2053                 changed |= BSS_CHANGED_ERP_PREAMBLE;
2054         }
2055
2056         if (use_short_slot != bss_conf->use_short_slot) {
2057                 bss_conf->use_short_slot = use_short_slot;
2058                 changed |= BSS_CHANGED_ERP_SLOT;
2059         }
2060
2061         return changed;
2062 }
2063
2064 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2065                                      struct cfg80211_bss *cbss,
2066                                      u32 bss_info_changed)
2067 {
2068         struct ieee80211_bss *bss = (void *)cbss->priv;
2069         struct ieee80211_local *local = sdata->local;
2070         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2071
2072         bss_info_changed |= BSS_CHANGED_ASSOC;
2073         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2074                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2075
2076         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2077                 beacon_loss_count * bss_conf->beacon_int));
2078
2079         sdata->u.mgd.associated = cbss;
2080         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2081
2082         ieee80211_check_rate_mask(sdata);
2083
2084         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2085
2086         if (sdata->vif.p2p ||
2087             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2088                 const struct cfg80211_bss_ies *ies;
2089
2090                 rcu_read_lock();
2091                 ies = rcu_dereference(cbss->ies);
2092                 if (ies) {
2093                         int ret;
2094
2095                         ret = cfg80211_get_p2p_attr(
2096                                         ies->data, ies->len,
2097                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2098                                         (u8 *) &bss_conf->p2p_noa_attr,
2099                                         sizeof(bss_conf->p2p_noa_attr));
2100                         if (ret >= 2) {
2101                                 sdata->u.mgd.p2p_noa_index =
2102                                         bss_conf->p2p_noa_attr.index;
2103                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
2104                         }
2105                 }
2106                 rcu_read_unlock();
2107         }
2108
2109         /* just to be sure */
2110         ieee80211_stop_poll(sdata);
2111
2112         ieee80211_led_assoc(local, 1);
2113
2114         if (sdata->u.mgd.have_beacon) {
2115                 /*
2116                  * If the AP is buggy we may get here with no DTIM period
2117                  * known, so assume it's 1 which is the only safe assumption
2118                  * in that case, although if the TIM IE is broken powersave
2119                  * probably just won't work at all.
2120                  */
2121                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2122                 bss_conf->beacon_rate = bss->beacon_rate;
2123                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2124         } else {
2125                 bss_conf->beacon_rate = NULL;
2126                 bss_conf->dtim_period = 0;
2127         }
2128
2129         bss_conf->assoc = 1;
2130
2131         /* Tell the driver to monitor connection quality (if supported) */
2132         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2133             bss_conf->cqm_rssi_thold)
2134                 bss_info_changed |= BSS_CHANGED_CQM;
2135
2136         /* Enable ARP filtering */
2137         if (bss_conf->arp_addr_cnt)
2138                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2139
2140         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2141
2142         mutex_lock(&local->iflist_mtx);
2143         ieee80211_recalc_ps(local);
2144         mutex_unlock(&local->iflist_mtx);
2145
2146         ieee80211_recalc_smps(sdata);
2147         ieee80211_recalc_ps_vif(sdata);
2148
2149         netif_carrier_on(sdata->dev);
2150 }
2151
2152 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2153                                    u16 stype, u16 reason, bool tx,
2154                                    u8 *frame_buf)
2155 {
2156         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2157         struct ieee80211_local *local = sdata->local;
2158         u32 changed = 0;
2159
2160         sdata_assert_lock(sdata);
2161
2162         if (WARN_ON_ONCE(tx && !frame_buf))
2163                 return;
2164
2165         if (WARN_ON(!ifmgd->associated))
2166                 return;
2167
2168         ieee80211_stop_poll(sdata);
2169
2170         ifmgd->associated = NULL;
2171         netif_carrier_off(sdata->dev);
2172
2173         /*
2174          * if we want to get out of ps before disassoc (why?) we have
2175          * to do it before sending disassoc, as otherwise the null-packet
2176          * won't be valid.
2177          */
2178         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2179                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2180                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2181         }
2182         local->ps_sdata = NULL;
2183
2184         /* disable per-vif ps */
2185         ieee80211_recalc_ps_vif(sdata);
2186
2187         /* make sure ongoing transmission finishes */
2188         synchronize_net();
2189
2190         /*
2191          * drop any frame before deauth/disassoc, this can be data or
2192          * management frame. Since we are disconnecting, we should not
2193          * insist sending these frames which can take time and delay
2194          * the disconnection and possible the roaming.
2195          */
2196         if (tx)
2197                 ieee80211_flush_queues(local, sdata, true);
2198
2199         /* deauthenticate/disassociate now */
2200         if (tx || frame_buf) {
2201                 /*
2202                  * In multi channel scenarios guarantee that the virtual
2203                  * interface is granted immediate airtime to transmit the
2204                  * deauthentication frame by calling mgd_prepare_tx, if the
2205                  * driver requested so.
2206                  */
2207                 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2208                     !ifmgd->have_beacon)
2209                         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2210
2211                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2212                                                reason, tx, frame_buf);
2213         }
2214
2215         /* flush out frame - make sure the deauth was actually sent */
2216         if (tx)
2217                 ieee80211_flush_queues(local, sdata, false);
2218
2219         /* clear bssid only after building the needed mgmt frames */
2220         eth_zero_addr(ifmgd->bssid);
2221
2222         /* remove AP and TDLS peers */
2223         sta_info_flush(sdata);
2224
2225         /* finally reset all BSS / config parameters */
2226         changed |= ieee80211_reset_erp_info(sdata);
2227
2228         ieee80211_led_assoc(local, 0);
2229         changed |= BSS_CHANGED_ASSOC;
2230         sdata->vif.bss_conf.assoc = false;
2231
2232         ifmgd->p2p_noa_index = -1;
2233         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2234                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2235
2236         /* on the next assoc, re-program HT/VHT parameters */
2237         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2238         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2239         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2240         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2241
2242         /* reset MU-MIMO ownership and group data */
2243         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2244                sizeof(sdata->vif.bss_conf.mu_group.membership));
2245         memset(sdata->vif.bss_conf.mu_group.position, 0,
2246                sizeof(sdata->vif.bss_conf.mu_group.position));
2247         changed |= BSS_CHANGED_MU_GROUPS;
2248         sdata->vif.mu_mimo_owner = false;
2249
2250         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2251
2252         del_timer_sync(&local->dynamic_ps_timer);
2253         cancel_work_sync(&local->dynamic_ps_enable_work);
2254
2255         /* Disable ARP filtering */
2256         if (sdata->vif.bss_conf.arp_addr_cnt)
2257                 changed |= BSS_CHANGED_ARP_FILTER;
2258
2259         sdata->vif.bss_conf.qos = false;
2260         changed |= BSS_CHANGED_QOS;
2261
2262         /* The BSSID (not really interesting) and HT changed */
2263         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2264         ieee80211_bss_info_change_notify(sdata, changed);
2265
2266         /* disassociated - set to defaults now */
2267         ieee80211_set_wmm_default(sdata, false, false);
2268
2269         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2270         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2271         del_timer_sync(&sdata->u.mgd.timer);
2272         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2273
2274         sdata->vif.bss_conf.dtim_period = 0;
2275         sdata->vif.bss_conf.beacon_rate = NULL;
2276
2277         ifmgd->have_beacon = false;
2278
2279         ifmgd->flags = 0;
2280         mutex_lock(&local->mtx);
2281         ieee80211_vif_release_channel(sdata);
2282
2283         sdata->vif.csa_active = false;
2284         ifmgd->csa_waiting_bcn = false;
2285         ifmgd->csa_ignored_same_chan = false;
2286         if (sdata->csa_block_tx) {
2287                 ieee80211_wake_vif_queues(local, sdata,
2288                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2289                 sdata->csa_block_tx = false;
2290         }
2291         mutex_unlock(&local->mtx);
2292
2293         /* existing TX TSPEC sessions no longer exist */
2294         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2295         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2296
2297         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2298 }
2299
2300 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2301                              struct ieee80211_hdr *hdr)
2302 {
2303         /*
2304          * We can postpone the mgd.timer whenever receiving unicast frames
2305          * from AP because we know that the connection is working both ways
2306          * at that time. But multicast frames (and hence also beacons) must
2307          * be ignored here, because we need to trigger the timer during
2308          * data idle periods for sending the periodic probe request to the
2309          * AP we're connected to.
2310          */
2311         if (is_multicast_ether_addr(hdr->addr1))
2312                 return;
2313
2314         ieee80211_sta_reset_conn_monitor(sdata);
2315 }
2316
2317 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2318 {
2319         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2320         struct ieee80211_local *local = sdata->local;
2321
2322         mutex_lock(&local->mtx);
2323         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2324                 goto out;
2325
2326         __ieee80211_stop_poll(sdata);
2327
2328         mutex_lock(&local->iflist_mtx);
2329         ieee80211_recalc_ps(local);
2330         mutex_unlock(&local->iflist_mtx);
2331
2332         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2333                 goto out;
2334
2335         /*
2336          * We've received a probe response, but are not sure whether
2337          * we have or will be receiving any beacons or data, so let's
2338          * schedule the timers again, just in case.
2339          */
2340         ieee80211_sta_reset_beacon_monitor(sdata);
2341
2342         mod_timer(&ifmgd->conn_mon_timer,
2343                   round_jiffies_up(jiffies +
2344                                    IEEE80211_CONNECTION_IDLE_TIME));
2345 out:
2346         mutex_unlock(&local->mtx);
2347 }
2348
2349 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2350                                            struct ieee80211_hdr *hdr,
2351                                            u16 tx_time)
2352 {
2353         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2354         u16 tid;
2355         int ac;
2356         struct ieee80211_sta_tx_tspec *tx_tspec;
2357         unsigned long now = jiffies;
2358
2359         if (!ieee80211_is_data_qos(hdr->frame_control))
2360                 return;
2361
2362         tid = ieee80211_get_tid(hdr);
2363         ac = ieee80211_ac_from_tid(tid);
2364         tx_tspec = &ifmgd->tx_tspec[ac];
2365
2366         if (likely(!tx_tspec->admitted_time))
2367                 return;
2368
2369         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2370                 tx_tspec->consumed_tx_time = 0;
2371                 tx_tspec->time_slice_start = now;
2372
2373                 if (tx_tspec->downgraded) {
2374                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2375                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2376                 }
2377         }
2378
2379         if (tx_tspec->downgraded)
2380                 return;
2381
2382         tx_tspec->consumed_tx_time += tx_time;
2383
2384         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2385                 tx_tspec->downgraded = true;
2386                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2387                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2388         }
2389 }
2390
2391 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2392                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2393 {
2394         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2395
2396         if (!ieee80211_is_data(hdr->frame_control))
2397             return;
2398
2399         if (ieee80211_is_any_nullfunc(hdr->frame_control) &&
2400             sdata->u.mgd.probe_send_count > 0) {
2401                 if (ack)
2402                         ieee80211_sta_reset_conn_monitor(sdata);
2403                 else
2404                         sdata->u.mgd.nullfunc_failed = true;
2405                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2406                 return;
2407         }
2408
2409         if (ack)
2410                 ieee80211_sta_reset_conn_monitor(sdata);
2411 }
2412
2413 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2414                                           const u8 *src, const u8 *dst,
2415                                           const u8 *ssid, size_t ssid_len,
2416                                           struct ieee80211_channel *channel)
2417 {
2418         struct sk_buff *skb;
2419
2420         skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2421                                         ssid, ssid_len, NULL, 0,
2422                                         IEEE80211_PROBE_FLAG_DIRECTED);
2423         if (skb)
2424                 ieee80211_tx_skb(sdata, skb);
2425 }
2426
2427 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2428 {
2429         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2430         const u8 *ssid;
2431         u8 *dst = ifmgd->associated->bssid;
2432         u8 unicast_limit = max(1, max_probe_tries - 3);
2433         struct sta_info *sta;
2434
2435         /*
2436          * Try sending broadcast probe requests for the last three
2437          * probe requests after the first ones failed since some
2438          * buggy APs only support broadcast probe requests.
2439          */
2440         if (ifmgd->probe_send_count >= unicast_limit)
2441                 dst = NULL;
2442
2443         /*
2444          * When the hardware reports an accurate Tx ACK status, it's
2445          * better to send a nullfunc frame instead of a probe request,
2446          * as it will kick us off the AP quickly if we aren't associated
2447          * anymore. The timeout will be reset if the frame is ACKed by
2448          * the AP.
2449          */
2450         ifmgd->probe_send_count++;
2451
2452         if (dst) {
2453                 mutex_lock(&sdata->local->sta_mtx);
2454                 sta = sta_info_get(sdata, dst);
2455                 if (!WARN_ON(!sta))
2456                         ieee80211_check_fast_rx(sta);
2457                 mutex_unlock(&sdata->local->sta_mtx);
2458         }
2459
2460         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2461                 ifmgd->nullfunc_failed = false;
2462                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2463         } else {
2464                 int ssid_len;
2465
2466                 rcu_read_lock();
2467                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2468                 if (WARN_ON_ONCE(ssid == NULL))
2469                         ssid_len = 0;
2470                 else
2471                         ssid_len = ssid[1];
2472
2473                 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2474                                               ssid + 2, ssid_len,
2475                                               ifmgd->associated->channel);
2476                 rcu_read_unlock();
2477         }
2478
2479         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2480         run_again(sdata, ifmgd->probe_timeout);
2481 }
2482
2483 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2484                                    bool beacon)
2485 {
2486         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2487         bool already = false;
2488
2489         if (!ieee80211_sdata_running(sdata))
2490                 return;
2491
2492         sdata_lock(sdata);
2493
2494         if (!ifmgd->associated)
2495                 goto out;
2496
2497         mutex_lock(&sdata->local->mtx);
2498
2499         if (sdata->local->tmp_channel || sdata->local->scanning) {
2500                 mutex_unlock(&sdata->local->mtx);
2501                 goto out;
2502         }
2503
2504         if (beacon) {
2505                 mlme_dbg_ratelimited(sdata,
2506                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2507                                      beacon_loss_count);
2508
2509                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2510         }
2511
2512         /*
2513          * The driver/our work has already reported this event or the
2514          * connection monitoring has kicked in and we have already sent
2515          * a probe request. Or maybe the AP died and the driver keeps
2516          * reporting until we disassociate...
2517          *
2518          * In either case we have to ignore the current call to this
2519          * function (except for setting the correct probe reason bit)
2520          * because otherwise we would reset the timer every time and
2521          * never check whether we received a probe response!
2522          */
2523         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2524                 already = true;
2525
2526         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2527
2528         mutex_unlock(&sdata->local->mtx);
2529
2530         if (already)
2531                 goto out;
2532
2533         mutex_lock(&sdata->local->iflist_mtx);
2534         ieee80211_recalc_ps(sdata->local);
2535         mutex_unlock(&sdata->local->iflist_mtx);
2536
2537         ifmgd->probe_send_count = 0;
2538         ieee80211_mgd_probe_ap_send(sdata);
2539  out:
2540         sdata_unlock(sdata);
2541 }
2542
2543 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2544                                           struct ieee80211_vif *vif)
2545 {
2546         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2547         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2548         struct cfg80211_bss *cbss;
2549         struct sk_buff *skb;
2550         const u8 *ssid;
2551         int ssid_len;
2552
2553         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2554                 return NULL;
2555
2556         sdata_assert_lock(sdata);
2557
2558         if (ifmgd->associated)
2559                 cbss = ifmgd->associated;
2560         else if (ifmgd->auth_data)
2561                 cbss = ifmgd->auth_data->bss;
2562         else if (ifmgd->assoc_data)
2563                 cbss = ifmgd->assoc_data->bss;
2564         else
2565                 return NULL;
2566
2567         rcu_read_lock();
2568         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2569         if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN,
2570                       "invalid SSID element (len=%d)", ssid ? ssid[1] : -1))
2571                 ssid_len = 0;
2572         else
2573                 ssid_len = ssid[1];
2574
2575         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2576                                         (u32) -1, cbss->channel,
2577                                         ssid + 2, ssid_len,
2578                                         NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2579         rcu_read_unlock();
2580
2581         return skb;
2582 }
2583 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2584
2585 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2586                                         const u8 *buf, size_t len, bool tx,
2587                                         u16 reason)
2588 {
2589         struct ieee80211_event event = {
2590                 .type = MLME_EVENT,
2591                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2592                 .u.mlme.reason = reason,
2593         };
2594
2595         if (tx)
2596                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2597         else
2598                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2599
2600         drv_event_callback(sdata->local, sdata, &event);
2601 }
2602
2603 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2604 {
2605         struct ieee80211_local *local = sdata->local;
2606         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2607         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2608         bool tx;
2609
2610         sdata_lock(sdata);
2611         if (!ifmgd->associated) {
2612                 sdata_unlock(sdata);
2613                 return;
2614         }
2615
2616         tx = !sdata->csa_block_tx;
2617
2618         /* AP is probably out of range (or not reachable for another reason) so
2619          * remove the bss struct for that AP.
2620          */
2621         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2622
2623         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2624                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2625                                tx, frame_buf);
2626         mutex_lock(&local->mtx);
2627         sdata->vif.csa_active = false;
2628         ifmgd->csa_waiting_bcn = false;
2629         if (sdata->csa_block_tx) {
2630                 ieee80211_wake_vif_queues(local, sdata,
2631                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2632                 sdata->csa_block_tx = false;
2633         }
2634         mutex_unlock(&local->mtx);
2635
2636         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2637                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2638
2639         sdata_unlock(sdata);
2640 }
2641
2642 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2643 {
2644         struct ieee80211_sub_if_data *sdata =
2645                 container_of(work, struct ieee80211_sub_if_data,
2646                              u.mgd.beacon_connection_loss_work);
2647         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2648
2649         if (ifmgd->associated)
2650                 ifmgd->beacon_loss_count++;
2651
2652         if (ifmgd->connection_loss) {
2653                 sdata_info(sdata, "Connection to AP %pM lost\n",
2654                            ifmgd->bssid);
2655                 __ieee80211_disconnect(sdata);
2656         } else {
2657                 ieee80211_mgd_probe_ap(sdata, true);
2658         }
2659 }
2660
2661 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2662 {
2663         struct ieee80211_sub_if_data *sdata =
2664                 container_of(work, struct ieee80211_sub_if_data,
2665                              u.mgd.csa_connection_drop_work);
2666
2667         __ieee80211_disconnect(sdata);
2668 }
2669
2670 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2671 {
2672         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2673         struct ieee80211_hw *hw = &sdata->local->hw;
2674
2675         trace_api_beacon_loss(sdata);
2676
2677         sdata->u.mgd.connection_loss = false;
2678         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2679 }
2680 EXPORT_SYMBOL(ieee80211_beacon_loss);
2681
2682 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2683 {
2684         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2685         struct ieee80211_hw *hw = &sdata->local->hw;
2686
2687         trace_api_connection_loss(sdata);
2688
2689         sdata->u.mgd.connection_loss = true;
2690         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2691 }
2692 EXPORT_SYMBOL(ieee80211_connection_loss);
2693
2694
2695 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2696                                         bool assoc)
2697 {
2698         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2699
2700         sdata_assert_lock(sdata);
2701
2702         if (!assoc) {
2703                 /*
2704                  * we are not authenticated yet, the only timer that could be
2705                  * running is the timeout for the authentication response which
2706                  * which is not relevant anymore.
2707                  */
2708                 del_timer_sync(&sdata->u.mgd.timer);
2709                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2710
2711                 eth_zero_addr(sdata->u.mgd.bssid);
2712                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2713                 sdata->u.mgd.flags = 0;
2714                 mutex_lock(&sdata->local->mtx);
2715                 ieee80211_vif_release_channel(sdata);
2716                 mutex_unlock(&sdata->local->mtx);
2717         }
2718
2719         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2720         kfree(auth_data);
2721         sdata->u.mgd.auth_data = NULL;
2722 }
2723
2724 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2725                                          bool assoc, bool abandon)
2726 {
2727         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2728
2729         sdata_assert_lock(sdata);
2730
2731         if (!assoc) {
2732                 /*
2733                  * we are not associated yet, the only timer that could be
2734                  * running is the timeout for the association response which
2735                  * which is not relevant anymore.
2736                  */
2737                 del_timer_sync(&sdata->u.mgd.timer);
2738                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2739
2740                 eth_zero_addr(sdata->u.mgd.bssid);
2741                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2742                 sdata->u.mgd.flags = 0;
2743                 sdata->vif.mu_mimo_owner = false;
2744
2745                 mutex_lock(&sdata->local->mtx);
2746                 ieee80211_vif_release_channel(sdata);
2747                 mutex_unlock(&sdata->local->mtx);
2748
2749                 if (abandon)
2750                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2751         }
2752
2753         kfree(assoc_data);
2754         sdata->u.mgd.assoc_data = NULL;
2755 }
2756
2757 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2758                                      struct ieee80211_mgmt *mgmt, size_t len)
2759 {
2760         struct ieee80211_local *local = sdata->local;
2761         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2762         u8 *pos;
2763         struct ieee802_11_elems elems;
2764         u32 tx_flags = 0;
2765
2766         pos = mgmt->u.auth.variable;
2767         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2768         if (!elems.challenge)
2769                 return;
2770         auth_data->expected_transaction = 4;
2771         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2772         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2773                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2774                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2775         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2776                             elems.challenge - 2, elems.challenge_len + 2,
2777                             auth_data->bss->bssid, auth_data->bss->bssid,
2778                             auth_data->key, auth_data->key_len,
2779                             auth_data->key_idx, tx_flags);
2780 }
2781
2782 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2783                                    struct ieee80211_mgmt *mgmt, size_t len)
2784 {
2785         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2786         u8 bssid[ETH_ALEN];
2787         u16 auth_alg, auth_transaction, status_code;
2788         struct sta_info *sta;
2789         struct ieee80211_event event = {
2790                 .type = MLME_EVENT,
2791                 .u.mlme.data = AUTH_EVENT,
2792         };
2793
2794         sdata_assert_lock(sdata);
2795
2796         if (len < 24 + 6)
2797                 return;
2798
2799         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2800                 return;
2801
2802         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2803
2804         if (!ether_addr_equal(bssid, mgmt->bssid))
2805                 return;
2806
2807         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2808         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2809         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2810
2811         if (auth_alg != ifmgd->auth_data->algorithm ||
2812             auth_transaction != ifmgd->auth_data->expected_transaction) {
2813                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2814                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2815                            auth_transaction,
2816                            ifmgd->auth_data->expected_transaction);
2817                 return;
2818         }
2819
2820         if (status_code != WLAN_STATUS_SUCCESS) {
2821                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2822                            mgmt->sa, status_code);
2823                 ieee80211_destroy_auth_data(sdata, false);
2824                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2825                 event.u.mlme.status = MLME_DENIED;
2826                 event.u.mlme.reason = status_code;
2827                 drv_event_callback(sdata->local, sdata, &event);
2828                 return;
2829         }
2830
2831         switch (ifmgd->auth_data->algorithm) {
2832         case WLAN_AUTH_OPEN:
2833         case WLAN_AUTH_LEAP:
2834         case WLAN_AUTH_FT:
2835         case WLAN_AUTH_SAE:
2836         case WLAN_AUTH_FILS_SK:
2837         case WLAN_AUTH_FILS_SK_PFS:
2838         case WLAN_AUTH_FILS_PK:
2839                 break;
2840         case WLAN_AUTH_SHARED_KEY:
2841                 if (ifmgd->auth_data->expected_transaction != 4) {
2842                         ieee80211_auth_challenge(sdata, mgmt, len);
2843                         /* need another frame */
2844                         return;
2845                 }
2846                 break;
2847         default:
2848                 WARN_ONCE(1, "invalid auth alg %d",
2849                           ifmgd->auth_data->algorithm);
2850                 return;
2851         }
2852
2853         event.u.mlme.status = MLME_SUCCESS;
2854         drv_event_callback(sdata->local, sdata, &event);
2855         sdata_info(sdata, "authenticated\n");
2856         ifmgd->auth_data->done = true;
2857         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2858         ifmgd->auth_data->timeout_started = true;
2859         run_again(sdata, ifmgd->auth_data->timeout);
2860
2861         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2862             ifmgd->auth_data->expected_transaction != 2) {
2863                 /*
2864                  * Report auth frame to user space for processing since another
2865                  * round of Authentication frames is still needed.
2866                  */
2867                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2868                 return;
2869         }
2870
2871         /* move station state to auth */
2872         mutex_lock(&sdata->local->sta_mtx);
2873         sta = sta_info_get(sdata, bssid);
2874         if (!sta) {
2875                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2876                 goto out_err;
2877         }
2878         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2879                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2880                 goto out_err;
2881         }
2882         mutex_unlock(&sdata->local->sta_mtx);
2883
2884         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2885         return;
2886  out_err:
2887         mutex_unlock(&sdata->local->sta_mtx);
2888         /* ignore frame -- wait for timeout */
2889 }
2890
2891 #define case_WLAN(type) \
2892         case WLAN_REASON_##type: return #type
2893
2894 const char *ieee80211_get_reason_code_string(u16 reason_code)
2895 {
2896         switch (reason_code) {
2897         case_WLAN(UNSPECIFIED);
2898         case_WLAN(PREV_AUTH_NOT_VALID);
2899         case_WLAN(DEAUTH_LEAVING);
2900         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2901         case_WLAN(DISASSOC_AP_BUSY);
2902         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2903         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2904         case_WLAN(DISASSOC_STA_HAS_LEFT);
2905         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2906         case_WLAN(DISASSOC_BAD_POWER);
2907         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2908         case_WLAN(INVALID_IE);
2909         case_WLAN(MIC_FAILURE);
2910         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2911         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2912         case_WLAN(IE_DIFFERENT);
2913         case_WLAN(INVALID_GROUP_CIPHER);
2914         case_WLAN(INVALID_PAIRWISE_CIPHER);
2915         case_WLAN(INVALID_AKMP);
2916         case_WLAN(UNSUPP_RSN_VERSION);
2917         case_WLAN(INVALID_RSN_IE_CAP);
2918         case_WLAN(IEEE8021X_FAILED);
2919         case_WLAN(CIPHER_SUITE_REJECTED);
2920         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2921         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2922         case_WLAN(DISASSOC_LOW_ACK);
2923         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2924         case_WLAN(QSTA_LEAVE_QBSS);
2925         case_WLAN(QSTA_NOT_USE);
2926         case_WLAN(QSTA_REQUIRE_SETUP);
2927         case_WLAN(QSTA_TIMEOUT);
2928         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2929         case_WLAN(MESH_PEER_CANCELED);
2930         case_WLAN(MESH_MAX_PEERS);
2931         case_WLAN(MESH_CONFIG);
2932         case_WLAN(MESH_CLOSE);
2933         case_WLAN(MESH_MAX_RETRIES);
2934         case_WLAN(MESH_CONFIRM_TIMEOUT);
2935         case_WLAN(MESH_INVALID_GTK);
2936         case_WLAN(MESH_INCONSISTENT_PARAM);
2937         case_WLAN(MESH_INVALID_SECURITY);
2938         case_WLAN(MESH_PATH_ERROR);
2939         case_WLAN(MESH_PATH_NOFORWARD);
2940         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2941         case_WLAN(MAC_EXISTS_IN_MBSS);
2942         case_WLAN(MESH_CHAN_REGULATORY);
2943         case_WLAN(MESH_CHAN);
2944         default: return "<unknown>";
2945         }
2946 }
2947
2948 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2949                                      struct ieee80211_mgmt *mgmt, size_t len)
2950 {
2951         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2952         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2953
2954         sdata_assert_lock(sdata);
2955
2956         if (len < 24 + 2)
2957                 return;
2958
2959         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
2960                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
2961                 return;
2962         }
2963
2964         if (ifmgd->associated &&
2965             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2966                 const u8 *bssid = ifmgd->associated->bssid;
2967
2968                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2969                            bssid, reason_code,
2970                            ieee80211_get_reason_code_string(reason_code));
2971
2972                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2973
2974                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2975                                             reason_code);
2976                 return;
2977         }
2978
2979         if (ifmgd->assoc_data &&
2980             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2981                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2982
2983                 sdata_info(sdata,
2984                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2985                            bssid, reason_code,
2986                            ieee80211_get_reason_code_string(reason_code));
2987
2988                 ieee80211_destroy_assoc_data(sdata, false, true);
2989
2990                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2991                 return;
2992         }
2993 }
2994
2995
2996 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2997                                        struct ieee80211_mgmt *mgmt, size_t len)
2998 {
2999         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3000         u16 reason_code;
3001
3002         sdata_assert_lock(sdata);
3003
3004         if (len < 24 + 2)
3005                 return;
3006
3007         if (!ifmgd->associated ||
3008             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3009                 return;
3010
3011         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3012
3013         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3014                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3015                 return;
3016         }
3017
3018         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3019                    mgmt->sa, reason_code,
3020                    ieee80211_get_reason_code_string(reason_code));
3021
3022         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3023
3024         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3025 }
3026
3027 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3028                                 u8 *supp_rates, unsigned int supp_rates_len,
3029                                 u32 *rates, u32 *basic_rates,
3030                                 bool *have_higher_than_11mbit,
3031                                 int *min_rate, int *min_rate_index,
3032                                 int shift)
3033 {
3034         int i, j;
3035
3036         for (i = 0; i < supp_rates_len; i++) {
3037                 int rate = supp_rates[i] & 0x7f;
3038                 bool is_basic = !!(supp_rates[i] & 0x80);
3039
3040                 if ((rate * 5 * (1 << shift)) > 110)
3041                         *have_higher_than_11mbit = true;
3042
3043                 /*
3044                  * Skip HT and VHT BSS membership selectors since they're not
3045                  * rates.
3046                  *
3047                  * Note: Even though the membership selector and the basic
3048                  *       rate flag share the same bit, they are not exactly
3049                  *       the same.
3050                  */
3051                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3052                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3053                         continue;
3054
3055                 for (j = 0; j < sband->n_bitrates; j++) {
3056                         struct ieee80211_rate *br;
3057                         int brate;
3058
3059                         br = &sband->bitrates[j];
3060
3061                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3062                         if (brate == rate) {
3063                                 *rates |= BIT(j);
3064                                 if (is_basic)
3065                                         *basic_rates |= BIT(j);
3066                                 if ((rate * 5) < *min_rate) {
3067                                         *min_rate = rate * 5;
3068                                         *min_rate_index = j;
3069                                 }
3070                                 break;
3071                         }
3072                 }
3073         }
3074 }
3075
3076 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3077                                     struct cfg80211_bss *cbss,
3078                                     struct ieee80211_mgmt *mgmt, size_t len)
3079 {
3080         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3081         struct ieee80211_local *local = sdata->local;
3082         struct ieee80211_supported_band *sband;
3083         struct sta_info *sta;
3084         u8 *pos;
3085         u16 capab_info, aid;
3086         struct ieee802_11_elems elems;
3087         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3088         const struct cfg80211_bss_ies *bss_ies = NULL;
3089         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3090         u32 changed = 0;
3091         int err;
3092         bool ret;
3093
3094         /* AssocResp and ReassocResp have identical structure */
3095
3096         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3097         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3098
3099         /*
3100          * The 5 MSB of the AID field are reserved
3101          * (802.11-2016 9.4.1.8 AID field)
3102          */
3103         aid &= 0x7ff;
3104
3105         ifmgd->broken_ap = false;
3106
3107         if (aid == 0 || aid > IEEE80211_MAX_AID) {
3108                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3109                            aid);
3110                 aid = 0;
3111                 ifmgd->broken_ap = true;
3112         }
3113
3114         pos = mgmt->u.assoc_resp.variable;
3115         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3116
3117         if (!elems.supp_rates) {
3118                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3119                 return false;
3120         }
3121
3122         ifmgd->aid = aid;
3123         ifmgd->tdls_chan_switch_prohibited =
3124                 elems.ext_capab && elems.ext_capab_len >= 5 &&
3125                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3126
3127         /*
3128          * Some APs are erroneously not including some information in their
3129          * (re)association response frames. Try to recover by using the data
3130          * from the beacon or probe response. This seems to afflict mobile
3131          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3132          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3133          */
3134         if ((assoc_data->wmm && !elems.wmm_param) ||
3135             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3136              (!elems.ht_cap_elem || !elems.ht_operation)) ||
3137             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3138              (!elems.vht_cap_elem || !elems.vht_operation))) {
3139                 const struct cfg80211_bss_ies *ies;
3140                 struct ieee802_11_elems bss_elems;
3141
3142                 rcu_read_lock();
3143                 ies = rcu_dereference(cbss->ies);
3144                 if (ies)
3145                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3146                                           GFP_ATOMIC);
3147                 rcu_read_unlock();
3148                 if (!bss_ies)
3149                         return false;
3150
3151                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3152                                        false, &bss_elems);
3153                 if (assoc_data->wmm &&
3154                     !elems.wmm_param && bss_elems.wmm_param) {
3155                         elems.wmm_param = bss_elems.wmm_param;
3156                         sdata_info(sdata,
3157                                    "AP bug: WMM param missing from AssocResp\n");
3158                 }
3159
3160                 /*
3161                  * Also check if we requested HT/VHT, otherwise the AP doesn't
3162                  * have to include the IEs in the (re)association response.
3163                  */
3164                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
3165                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3166                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
3167                         sdata_info(sdata,
3168                                    "AP bug: HT capability missing from AssocResp\n");
3169                 }
3170                 if (!elems.ht_operation && bss_elems.ht_operation &&
3171                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3172                         elems.ht_operation = bss_elems.ht_operation;
3173                         sdata_info(sdata,
3174                                    "AP bug: HT operation missing from AssocResp\n");
3175                 }
3176                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3177                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3178                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
3179                         sdata_info(sdata,
3180                                    "AP bug: VHT capa missing from AssocResp\n");
3181                 }
3182                 if (!elems.vht_operation && bss_elems.vht_operation &&
3183                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3184                         elems.vht_operation = bss_elems.vht_operation;
3185                         sdata_info(sdata,
3186                                    "AP bug: VHT operation missing from AssocResp\n");
3187                 }
3188         }
3189
3190         /*
3191          * We previously checked these in the beacon/probe response, so
3192          * they should be present here. This is just a safety net.
3193          */
3194         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3195             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3196                 sdata_info(sdata,
3197                            "HT AP is missing WMM params or HT capability/operation\n");
3198                 ret = false;
3199                 goto out;
3200         }
3201
3202         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3203             (!elems.vht_cap_elem || !elems.vht_operation)) {
3204                 sdata_info(sdata,
3205                            "VHT AP is missing VHT capability/operation\n");
3206                 ret = false;
3207                 goto out;
3208         }
3209
3210         mutex_lock(&sdata->local->sta_mtx);
3211         /*
3212          * station info was already allocated and inserted before
3213          * the association and should be available to us
3214          */
3215         sta = sta_info_get(sdata, cbss->bssid);
3216         if (WARN_ON(!sta)) {
3217                 mutex_unlock(&sdata->local->sta_mtx);
3218                 ret = false;
3219                 goto out;
3220         }
3221
3222         sband = ieee80211_get_sband(sdata);
3223         if (!sband) {
3224                 mutex_unlock(&sdata->local->sta_mtx);
3225                 ret = false;
3226                 goto out;
3227         }
3228
3229         /*
3230          * If AP doesn't support HT, or it doesn't have HE mandatory IEs, mark
3231          * HE as disabled. If on the 5GHz band, make sure it supports VHT.
3232          */
3233         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
3234             (sband->band == NL80211_BAND_5GHZ &&
3235              ifmgd->flags & IEEE80211_STA_DISABLE_VHT) ||
3236             (!elems.he_cap && !elems.he_operation))
3237                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
3238
3239         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3240             (!elems.he_cap || !elems.he_operation)) {
3241                 mutex_unlock(&sdata->local->sta_mtx);
3242                 sdata_info(sdata,
3243                            "HE AP is missing HE capability/operation\n");
3244                 ret = false;
3245                 goto out;
3246         }
3247
3248         /* Set up internal HT/VHT capabilities */
3249         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3250                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3251                                                   elems.ht_cap_elem, sta);
3252
3253         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3254                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3255                                                     elems.vht_cap_elem, sta);
3256
3257         if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3258             elems.he_cap) {
3259                 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3260                                                   elems.he_cap,
3261                                                   elems.he_cap_len,
3262                                                   sta);
3263
3264                 bss_conf->he_support = sta->sta.he_cap.has_he;
3265         } else {
3266                 bss_conf->he_support = false;
3267         }
3268
3269         if (bss_conf->he_support) {
3270                 bss_conf->bss_color =
3271                         le32_get_bits(elems.he_operation->he_oper_params,
3272                                       IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3273
3274                 bss_conf->htc_trig_based_pkt_ext =
3275                         le32_get_bits(elems.he_operation->he_oper_params,
3276                               IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3277                 bss_conf->frame_time_rts_th =
3278                         le32_get_bits(elems.he_operation->he_oper_params,
3279                               IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3280
3281                 bss_conf->multi_sta_back_32bit =
3282                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3283                         IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3284
3285                 bss_conf->ack_enabled =
3286                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3287                         IEEE80211_HE_MAC_CAP2_ACK_EN;
3288
3289                 bss_conf->uora_exists = !!elems.uora_element;
3290                 if (elems.uora_element)
3291                         bss_conf->uora_ocw_range = elems.uora_element[0];
3292
3293                 /* TODO: OPEN: what happens if BSS color disable is set? */
3294         }
3295
3296         /*
3297          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3298          * in their association response, so ignore that data for our own
3299          * configuration. If it changed since the last beacon, we'll get the
3300          * next beacon and update then.
3301          */
3302
3303         /*
3304          * If an operating mode notification IE is present, override the
3305          * NSS calculation (that would be done in rate_control_rate_init())
3306          * and use the # of streams from that element.
3307          */
3308         if (elems.opmode_notif &&
3309             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3310                 u8 nss;
3311
3312                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3313                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3314                 nss += 1;
3315                 sta->sta.rx_nss = nss;
3316         }
3317
3318         rate_control_rate_init(sta);
3319
3320         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3321                 set_sta_flag(sta, WLAN_STA_MFP);
3322                 sta->sta.mfp = true;
3323         } else {
3324                 sta->sta.mfp = false;
3325         }
3326
3327         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3328
3329         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3330         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3331                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3332         if (err) {
3333                 sdata_info(sdata,
3334                            "failed to move station %pM to desired state\n",
3335                            sta->sta.addr);
3336                 WARN_ON(__sta_info_destroy(sta));
3337                 mutex_unlock(&sdata->local->sta_mtx);
3338                 ret = false;
3339                 goto out;
3340         }
3341
3342         mutex_unlock(&sdata->local->sta_mtx);
3343
3344         /*
3345          * Always handle WMM once after association regardless
3346          * of the first value the AP uses. Setting -1 here has
3347          * that effect because the AP values is an unsigned
3348          * 4-bit value.
3349          */
3350         ifmgd->wmm_last_param_set = -1;
3351
3352         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3353                 ieee80211_set_wmm_default(sdata, false, false);
3354         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3355                                              elems.wmm_param_len,
3356                                              elems.mu_edca_param_set)) {
3357                 /* still enable QoS since we might have HT/VHT */
3358                 ieee80211_set_wmm_default(sdata, false, true);
3359                 /* set the disable-WMM flag in this case to disable
3360                  * tracking WMM parameter changes in the beacon if
3361                  * the parameters weren't actually valid. Doing so
3362                  * avoids changing parameters very strangely when
3363                  * the AP is going back and forth between valid and
3364                  * invalid parameters.
3365                  */
3366                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3367         }
3368         changed |= BSS_CHANGED_QOS;
3369
3370         if (elems.max_idle_period_ie) {
3371                 bss_conf->max_idle_period =
3372                         le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3373                 bss_conf->protected_keep_alive =
3374                         !!(elems.max_idle_period_ie->idle_options &
3375                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3376                 changed |= BSS_CHANGED_KEEP_ALIVE;
3377         } else {
3378                 bss_conf->max_idle_period = 0;
3379                 bss_conf->protected_keep_alive = false;
3380         }
3381
3382         /* set AID and assoc capability,
3383          * ieee80211_set_associated() will tell the driver */
3384         bss_conf->aid = aid;
3385         bss_conf->assoc_capability = capab_info;
3386         ieee80211_set_associated(sdata, cbss, changed);
3387
3388         /*
3389          * If we're using 4-addr mode, let the AP know that we're
3390          * doing so, so that it can create the STA VLAN on its side
3391          */
3392         if (ifmgd->use_4addr)
3393                 ieee80211_send_4addr_nullfunc(local, sdata);
3394
3395         /*
3396          * Start timer to probe the connection to the AP now.
3397          * Also start the timer that will detect beacon loss.
3398          */
3399         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3400         ieee80211_sta_reset_beacon_monitor(sdata);
3401
3402         ret = true;
3403  out:
3404         kfree(bss_ies);
3405         return ret;
3406 }
3407
3408 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3409                                          struct ieee80211_mgmt *mgmt,
3410                                          size_t len)
3411 {
3412         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3413         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3414         u16 capab_info, status_code, aid;
3415         struct ieee802_11_elems elems;
3416         int ac, uapsd_queues = -1;
3417         u8 *pos;
3418         bool reassoc;
3419         struct cfg80211_bss *bss;
3420         struct ieee80211_event event = {
3421                 .type = MLME_EVENT,
3422                 .u.mlme.data = ASSOC_EVENT,
3423         };
3424
3425         sdata_assert_lock(sdata);
3426
3427         if (!assoc_data)
3428                 return;
3429         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3430                 return;
3431
3432         /*
3433          * AssocResp and ReassocResp have identical structure, so process both
3434          * of them in this function.
3435          */
3436
3437         if (len < 24 + 6)
3438                 return;
3439
3440         reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3441         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3442         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3443         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3444
3445         sdata_info(sdata,
3446                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3447                    reassoc ? "Rea" : "A", mgmt->sa,
3448                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3449
3450         if (assoc_data->fils_kek_len &&
3451             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3452                 return;
3453
3454         pos = mgmt->u.assoc_resp.variable;
3455         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3456
3457         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3458             elems.timeout_int &&
3459             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3460                 u32 tu, ms;
3461                 tu = le32_to_cpu(elems.timeout_int->value);
3462                 ms = tu * 1024 / 1000;
3463                 sdata_info(sdata,
3464                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3465                            mgmt->sa, tu, ms);
3466                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3467                 assoc_data->timeout_started = true;
3468                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3469                         run_again(sdata, assoc_data->timeout);
3470                 return;
3471         }
3472
3473         bss = assoc_data->bss;
3474
3475         if (status_code != WLAN_STATUS_SUCCESS) {
3476                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3477                            mgmt->sa, status_code);
3478                 ieee80211_destroy_assoc_data(sdata, false, false);
3479                 event.u.mlme.status = MLME_DENIED;
3480                 event.u.mlme.reason = status_code;
3481                 drv_event_callback(sdata->local, sdata, &event);
3482         } else {
3483                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3484                         /* oops -- internal error -- send timeout for now */
3485                         ieee80211_destroy_assoc_data(sdata, false, false);
3486                         cfg80211_assoc_timeout(sdata->dev, bss);
3487                         return;
3488                 }
3489                 event.u.mlme.status = MLME_SUCCESS;
3490                 drv_event_callback(sdata->local, sdata, &event);
3491                 sdata_info(sdata, "associated\n");
3492
3493                 /*
3494                  * destroy assoc_data afterwards, as otherwise an idle
3495                  * recalc after assoc_data is NULL but before associated
3496                  * is set can cause the interface to go idle
3497                  */
3498                 ieee80211_destroy_assoc_data(sdata, true, false);
3499
3500                 /* get uapsd queues configuration */
3501                 uapsd_queues = 0;
3502                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3503                         if (sdata->tx_conf[ac].uapsd)
3504                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3505         }
3506
3507         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3508 }
3509
3510 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3511                                   struct ieee80211_mgmt *mgmt, size_t len,
3512                                   struct ieee80211_rx_status *rx_status,
3513                                   struct ieee802_11_elems *elems)
3514 {
3515         struct ieee80211_local *local = sdata->local;
3516         struct ieee80211_bss *bss;
3517         struct ieee80211_channel *channel;
3518
3519         sdata_assert_lock(sdata);
3520
3521         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3522         if (!channel)
3523                 return;
3524
3525         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3526                                         channel);
3527         if (bss) {
3528                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3529                 ieee80211_rx_bss_put(local, bss);
3530         }
3531 }
3532
3533
3534 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3535                                          struct sk_buff *skb)
3536 {
3537         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3538         struct ieee80211_if_managed *ifmgd;
3539         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3540         size_t baselen, len = skb->len;
3541         struct ieee802_11_elems elems;
3542
3543         ifmgd = &sdata->u.mgd;
3544
3545         sdata_assert_lock(sdata);
3546
3547         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3548                 return; /* ignore ProbeResp to foreign address */
3549
3550         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3551         if (baselen > len)
3552                 return;
3553
3554         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3555                                false, &elems);
3556
3557         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3558
3559         if (ifmgd->associated &&
3560             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3561                 ieee80211_reset_ap_probe(sdata);
3562 }
3563
3564 /*
3565  * This is the canonical list of information elements we care about,
3566  * the filter code also gives us all changes to the Microsoft OUI
3567  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3568  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3569  * changes to requested client power.
3570  *
3571  * We implement beacon filtering in software since that means we can
3572  * avoid processing the frame here and in cfg80211, and userspace
3573  * will not be able to tell whether the hardware supports it or not.
3574  *
3575  * XXX: This list needs to be dynamic -- userspace needs to be able to
3576  *      add items it requires. It also needs to be able to tell us to
3577  *      look out for other vendor IEs.
3578  */
3579 static const u64 care_about_ies =
3580         (1ULL << WLAN_EID_COUNTRY) |
3581         (1ULL << WLAN_EID_ERP_INFO) |
3582         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3583         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3584         (1ULL << WLAN_EID_HT_CAPABILITY) |
3585         (1ULL << WLAN_EID_HT_OPERATION) |
3586         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3587
3588 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3589                                         struct ieee80211_if_managed *ifmgd,
3590                                         struct ieee80211_bss_conf *bss_conf,
3591                                         struct ieee80211_local *local,
3592                                         struct ieee80211_rx_status *rx_status)
3593 {
3594         /* Track average RSSI from the Beacon frames of the current AP */
3595
3596         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3597                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3598                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3599                 ifmgd->last_cqm_event_signal = 0;
3600                 ifmgd->count_beacon_signal = 1;
3601                 ifmgd->last_ave_beacon_signal = 0;
3602         } else {
3603                 ifmgd->count_beacon_signal++;
3604         }
3605
3606         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3607
3608         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3609             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3610                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3611                 int last_sig = ifmgd->last_ave_beacon_signal;
3612                 struct ieee80211_event event = {
3613                         .type = RSSI_EVENT,
3614                 };
3615
3616                 /*
3617                  * if signal crosses either of the boundaries, invoke callback
3618                  * with appropriate parameters
3619                  */
3620                 if (sig > ifmgd->rssi_max_thold &&
3621                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3622                         ifmgd->last_ave_beacon_signal = sig;
3623                         event.u.rssi.data = RSSI_EVENT_HIGH;
3624                         drv_event_callback(local, sdata, &event);
3625                 } else if (sig < ifmgd->rssi_min_thold &&
3626                            (last_sig >= ifmgd->rssi_max_thold ||
3627                            last_sig == 0)) {
3628                         ifmgd->last_ave_beacon_signal = sig;
3629                         event.u.rssi.data = RSSI_EVENT_LOW;
3630                         drv_event_callback(local, sdata, &event);
3631                 }
3632         }
3633
3634         if (bss_conf->cqm_rssi_thold &&
3635             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3636             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3637                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3638                 int last_event = ifmgd->last_cqm_event_signal;
3639                 int thold = bss_conf->cqm_rssi_thold;
3640                 int hyst = bss_conf->cqm_rssi_hyst;
3641
3642                 if (sig < thold &&
3643                     (last_event == 0 || sig < last_event - hyst)) {
3644                         ifmgd->last_cqm_event_signal = sig;
3645                         ieee80211_cqm_rssi_notify(
3646                                 &sdata->vif,
3647                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3648                                 sig, GFP_KERNEL);
3649                 } else if (sig > thold &&
3650                            (last_event == 0 || sig > last_event + hyst)) {
3651                         ifmgd->last_cqm_event_signal = sig;
3652                         ieee80211_cqm_rssi_notify(
3653                                 &sdata->vif,
3654                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3655                                 sig, GFP_KERNEL);
3656                 }
3657         }
3658
3659         if (bss_conf->cqm_rssi_low &&
3660             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3661                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3662                 int last_event = ifmgd->last_cqm_event_signal;
3663                 int low = bss_conf->cqm_rssi_low;
3664                 int high = bss_conf->cqm_rssi_high;
3665
3666                 if (sig < low &&
3667                     (last_event == 0 || last_event >= low)) {
3668                         ifmgd->last_cqm_event_signal = sig;
3669                         ieee80211_cqm_rssi_notify(
3670                                 &sdata->vif,
3671                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3672                                 sig, GFP_KERNEL);
3673                 } else if (sig > high &&
3674                            (last_event == 0 || last_event <= high)) {
3675                         ifmgd->last_cqm_event_signal = sig;
3676                         ieee80211_cqm_rssi_notify(
3677                                 &sdata->vif,
3678                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3679                                 sig, GFP_KERNEL);
3680                 }
3681         }
3682 }
3683
3684 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3685                                      struct ieee80211_mgmt *mgmt, size_t len,
3686                                      struct ieee80211_rx_status *rx_status)
3687 {
3688         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3689         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3690         size_t baselen;
3691         struct ieee802_11_elems elems;
3692         struct ieee80211_local *local = sdata->local;
3693         struct ieee80211_chanctx_conf *chanctx_conf;
3694         struct ieee80211_channel *chan;
3695         struct sta_info *sta;
3696         u32 changed = 0;
3697         bool erp_valid;
3698         u8 erp_value = 0;
3699         u32 ncrc;
3700         u8 *bssid;
3701         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3702
3703         sdata_assert_lock(sdata);
3704
3705         /* Process beacon from the current BSS */
3706         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3707         if (baselen > len)
3708                 return;
3709
3710         rcu_read_lock();
3711         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3712         if (!chanctx_conf) {
3713                 rcu_read_unlock();
3714                 return;
3715         }
3716
3717         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3718                 rcu_read_unlock();
3719                 return;
3720         }
3721         chan = chanctx_conf->def.chan;
3722         rcu_read_unlock();
3723
3724         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3725             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3726                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3727                                        len - baselen, false, &elems);
3728
3729                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3730                 if (elems.tim && !elems.parse_error) {
3731                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3732                         ifmgd->dtim_period = tim_ie->dtim_period;
3733                 }
3734                 ifmgd->have_beacon = true;
3735                 ifmgd->assoc_data->need_beacon = false;
3736                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3737                         sdata->vif.bss_conf.sync_tsf =
3738                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3739                         sdata->vif.bss_conf.sync_device_ts =
3740                                 rx_status->device_timestamp;
3741                         if (elems.tim)
3742                                 sdata->vif.bss_conf.sync_dtim_count =
3743                                         elems.tim->dtim_count;
3744                         else
3745                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3746                 }
3747                 /* continue assoc process */
3748                 ifmgd->assoc_data->timeout = jiffies;
3749                 ifmgd->assoc_data->timeout_started = true;
3750                 run_again(sdata, ifmgd->assoc_data->timeout);
3751                 return;
3752         }
3753
3754         if (!ifmgd->associated ||
3755             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3756                 return;
3757         bssid = ifmgd->associated->bssid;
3758
3759         if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3760                 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3761                                             local, rx_status);
3762
3763         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3764                 mlme_dbg_ratelimited(sdata,
3765                                      "cancelling AP probe due to a received beacon\n");
3766                 ieee80211_reset_ap_probe(sdata);
3767         }
3768
3769         /*
3770          * Push the beacon loss detection into the future since
3771          * we are processing a beacon from the AP just now.
3772          */
3773         ieee80211_sta_reset_beacon_monitor(sdata);
3774
3775         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3776         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3777                                           len - baselen, false, &elems,
3778                                           care_about_ies, ncrc);
3779
3780         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3781             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3782                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3783                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3784                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3785                                 ieee80211_hw_config(local,
3786                                                     IEEE80211_CONF_CHANGE_PS);
3787                         }
3788                         ieee80211_send_nullfunc(local, sdata, false);
3789                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3790                         local->pspolling = true;
3791
3792                         /*
3793                          * Here is assumed that the driver will be
3794                          * able to send ps-poll frame and receive a
3795                          * response even though power save mode is
3796                          * enabled, but some drivers might require
3797                          * to disable power save here. This needs
3798                          * to be investigated.
3799                          */
3800                         ieee80211_send_pspoll(local, sdata);
3801                 }
3802         }
3803
3804         if (sdata->vif.p2p ||
3805             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3806                 struct ieee80211_p2p_noa_attr noa = {};
3807                 int ret;
3808
3809                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3810                                             len - baselen,
3811                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3812                                             (u8 *) &noa, sizeof(noa));
3813                 if (ret >= 2) {
3814                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3815                                 /* valid noa_attr and index changed */
3816                                 sdata->u.mgd.p2p_noa_index = noa.index;
3817                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3818                                 changed |= BSS_CHANGED_P2P_PS;
3819                                 /*
3820                                  * make sure we update all information, the CRC
3821                                  * mechanism doesn't look at P2P attributes.
3822                                  */
3823                                 ifmgd->beacon_crc_valid = false;
3824                         }
3825                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3826                         /* noa_attr not found and we had valid noa_attr before */
3827                         sdata->u.mgd.p2p_noa_index = -1;
3828                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3829                         changed |= BSS_CHANGED_P2P_PS;
3830                         ifmgd->beacon_crc_valid = false;
3831                 }
3832         }
3833
3834         if (ifmgd->csa_waiting_bcn)
3835                 ieee80211_chswitch_post_beacon(sdata);
3836
3837         /*
3838          * Update beacon timing and dtim count on every beacon appearance. This
3839          * will allow the driver to use the most updated values. Do it before
3840          * comparing this one with last received beacon.
3841          * IMPORTANT: These parameters would possibly be out of sync by the time
3842          * the driver will use them. The synchronized view is currently
3843          * guaranteed only in certain callbacks.
3844          */
3845         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3846                 sdata->vif.bss_conf.sync_tsf =
3847                         le64_to_cpu(mgmt->u.beacon.timestamp);
3848                 sdata->vif.bss_conf.sync_device_ts =
3849                         rx_status->device_timestamp;
3850                 if (elems.tim)
3851                         sdata->vif.bss_conf.sync_dtim_count =
3852                                 elems.tim->dtim_count;
3853                 else
3854                         sdata->vif.bss_conf.sync_dtim_count = 0;
3855         }
3856
3857         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3858                 return;
3859         ifmgd->beacon_crc = ncrc;
3860         ifmgd->beacon_crc_valid = true;
3861
3862         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3863
3864         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3865                                          rx_status->device_timestamp,
3866                                          &elems, true);
3867
3868         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3869             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3870                                      elems.wmm_param_len,
3871                                      elems.mu_edca_param_set))
3872                 changed |= BSS_CHANGED_QOS;
3873
3874         /*
3875          * If we haven't had a beacon before, tell the driver about the
3876          * DTIM period (and beacon timing if desired) now.
3877          */
3878         if (!ifmgd->have_beacon) {
3879                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3880                 if (elems.tim)
3881                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3882                 else
3883                         bss_conf->dtim_period = 1;
3884
3885                 changed |= BSS_CHANGED_BEACON_INFO;
3886                 ifmgd->have_beacon = true;
3887
3888                 mutex_lock(&local->iflist_mtx);
3889                 ieee80211_recalc_ps(local);
3890                 mutex_unlock(&local->iflist_mtx);
3891
3892                 ieee80211_recalc_ps_vif(sdata);
3893         }
3894
3895         if (elems.erp_info) {
3896                 erp_valid = true;
3897                 erp_value = elems.erp_info[0];
3898         } else {
3899                 erp_valid = false;
3900         }
3901         changed |= ieee80211_handle_bss_capability(sdata,
3902                         le16_to_cpu(mgmt->u.beacon.capab_info),
3903                         erp_valid, erp_value);
3904
3905         mutex_lock(&local->sta_mtx);
3906         sta = sta_info_get(sdata, bssid);
3907
3908         if (ieee80211_config_bw(sdata, sta,
3909                                 elems.ht_cap_elem, elems.ht_operation,
3910                                 elems.vht_operation, elems.he_operation,
3911                                 bssid, &changed)) {
3912                 mutex_unlock(&local->sta_mtx);
3913                 sdata_info(sdata,
3914                            "failed to follow AP %pM bandwidth change, disconnect\n",
3915                            bssid);
3916                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3917                                        WLAN_REASON_DEAUTH_LEAVING,
3918                                        true, deauth_buf);
3919                 ieee80211_report_disconnect(sdata, deauth_buf,
3920                                             sizeof(deauth_buf), true,
3921                                             WLAN_REASON_DEAUTH_LEAVING);
3922                 return;
3923         }
3924
3925         if (sta && elems.opmode_notif)
3926                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3927                                             rx_status->band);
3928         mutex_unlock(&local->sta_mtx);
3929
3930         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3931                                                elems.country_elem,
3932                                                elems.country_elem_len,
3933                                                elems.pwr_constr_elem,
3934                                                elems.cisco_dtpc_elem);
3935
3936         ieee80211_bss_info_change_notify(sdata, changed);
3937 }
3938
3939 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3940                                   struct sk_buff *skb)
3941 {
3942         struct ieee80211_rx_status *rx_status;
3943         struct ieee80211_mgmt *mgmt;
3944         u16 fc;
3945         struct ieee802_11_elems elems;
3946         int ies_len;
3947
3948         rx_status = (struct ieee80211_rx_status *) skb->cb;
3949         mgmt = (struct ieee80211_mgmt *) skb->data;
3950         fc = le16_to_cpu(mgmt->frame_control);
3951
3952         sdata_lock(sdata);
3953
3954         switch (fc & IEEE80211_FCTL_STYPE) {
3955         case IEEE80211_STYPE_BEACON:
3956                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3957                 break;
3958         case IEEE80211_STYPE_PROBE_RESP:
3959                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3960                 break;
3961         case IEEE80211_STYPE_AUTH:
3962                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3963                 break;
3964         case IEEE80211_STYPE_DEAUTH:
3965                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3966                 break;
3967         case IEEE80211_STYPE_DISASSOC:
3968                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3969                 break;
3970         case IEEE80211_STYPE_ASSOC_RESP:
3971         case IEEE80211_STYPE_REASSOC_RESP:
3972                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3973                 break;
3974         case IEEE80211_STYPE_ACTION:
3975                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3976                         ies_len = skb->len -
3977                                   offsetof(struct ieee80211_mgmt,
3978                                            u.action.u.chan_switch.variable);
3979
3980                         if (ies_len < 0)
3981                                 break;
3982
3983                         ieee802_11_parse_elems(
3984                                 mgmt->u.action.u.chan_switch.variable,
3985                                 ies_len, true, &elems);
3986
3987                         if (elems.parse_error)
3988                                 break;
3989
3990                         ieee80211_sta_process_chanswitch(sdata,
3991                                                  rx_status->mactime,
3992                                                  rx_status->device_timestamp,
3993                                                  &elems, false);
3994                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3995                         ies_len = skb->len -
3996                                   offsetof(struct ieee80211_mgmt,
3997                                            u.action.u.ext_chan_switch.variable);
3998
3999                         if (ies_len < 0)
4000                                 break;
4001
4002                         ieee802_11_parse_elems(
4003                                 mgmt->u.action.u.ext_chan_switch.variable,
4004                                 ies_len, true, &elems);
4005
4006                         if (elems.parse_error)
4007                                 break;
4008
4009                         /* for the handling code pretend this was also an IE */
4010                         elems.ext_chansw_ie =
4011                                 &mgmt->u.action.u.ext_chan_switch.data;
4012
4013                         ieee80211_sta_process_chanswitch(sdata,
4014                                                  rx_status->mactime,
4015                                                  rx_status->device_timestamp,
4016                                                  &elems, false);
4017                 }
4018                 break;
4019         }
4020         sdata_unlock(sdata);
4021 }
4022
4023 static void ieee80211_sta_timer(struct timer_list *t)
4024 {
4025         struct ieee80211_sub_if_data *sdata =
4026                 from_timer(sdata, t, u.mgd.timer);
4027
4028         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4029 }
4030
4031 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4032                                           u8 *bssid, u8 reason, bool tx)
4033 {
4034         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4035
4036         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4037                                tx, frame_buf);
4038
4039         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4040                                     reason);
4041 }
4042
4043 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4044 {
4045         struct ieee80211_local *local = sdata->local;
4046         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4047         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4048         u32 tx_flags = 0;
4049         u16 trans = 1;
4050         u16 status = 0;
4051         u16 prepare_tx_duration = 0;
4052
4053         sdata_assert_lock(sdata);
4054
4055         if (WARN_ON_ONCE(!auth_data))
4056                 return -EINVAL;
4057
4058         auth_data->tries++;
4059
4060         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4061                 sdata_info(sdata, "authentication with %pM timed out\n",
4062                            auth_data->bss->bssid);
4063
4064                 /*
4065                  * Most likely AP is not in the range so remove the
4066                  * bss struct for that AP.
4067                  */
4068                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4069
4070                 return -ETIMEDOUT;
4071         }
4072
4073         if (auth_data->algorithm == WLAN_AUTH_SAE)
4074                 prepare_tx_duration =
4075                         jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4076
4077         drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4078
4079         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4080                    auth_data->bss->bssid, auth_data->tries,
4081                    IEEE80211_AUTH_MAX_TRIES);
4082
4083         auth_data->expected_transaction = 2;
4084
4085         if (auth_data->algorithm == WLAN_AUTH_SAE) {
4086                 trans = auth_data->sae_trans;
4087                 status = auth_data->sae_status;
4088                 auth_data->expected_transaction = trans;
4089         }
4090
4091         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4092                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4093                            IEEE80211_TX_INTFL_MLME_CONN_TX;
4094
4095         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4096                             auth_data->data, auth_data->data_len,
4097                             auth_data->bss->bssid,
4098                             auth_data->bss->bssid, NULL, 0, 0,
4099                             tx_flags);
4100
4101         if (tx_flags == 0) {
4102                 if (auth_data->algorithm == WLAN_AUTH_SAE)
4103                         auth_data->timeout = jiffies +
4104                                 IEEE80211_AUTH_TIMEOUT_SAE;
4105                 else
4106                         auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4107         } else {
4108                 auth_data->timeout =
4109                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4110         }
4111
4112         auth_data->timeout_started = true;
4113         run_again(sdata, auth_data->timeout);
4114
4115         return 0;
4116 }
4117
4118 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4119 {
4120         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4121         struct ieee80211_local *local = sdata->local;
4122
4123         sdata_assert_lock(sdata);
4124
4125         assoc_data->tries++;
4126         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4127                 sdata_info(sdata, "association with %pM timed out\n",
4128                            assoc_data->bss->bssid);
4129
4130                 /*
4131                  * Most likely AP is not in the range so remove the
4132                  * bss struct for that AP.
4133                  */
4134                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4135
4136                 return -ETIMEDOUT;
4137         }
4138
4139         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4140                    assoc_data->bss->bssid, assoc_data->tries,
4141                    IEEE80211_ASSOC_MAX_TRIES);
4142         ieee80211_send_assoc(sdata);
4143
4144         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4145                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4146                 assoc_data->timeout_started = true;
4147                 run_again(sdata, assoc_data->timeout);
4148         } else {
4149                 assoc_data->timeout =
4150                         round_jiffies_up(jiffies +
4151                                          IEEE80211_ASSOC_TIMEOUT_LONG);
4152                 assoc_data->timeout_started = true;
4153                 run_again(sdata, assoc_data->timeout);
4154         }
4155
4156         return 0;
4157 }
4158
4159 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4160                                   __le16 fc, bool acked)
4161 {
4162         struct ieee80211_local *local = sdata->local;
4163
4164         sdata->u.mgd.status_fc = fc;
4165         sdata->u.mgd.status_acked = acked;
4166         sdata->u.mgd.status_received = true;
4167
4168         ieee80211_queue_work(&local->hw, &sdata->work);
4169 }
4170
4171 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4172 {
4173         struct ieee80211_local *local = sdata->local;
4174         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4175
4176         sdata_lock(sdata);
4177
4178         if (ifmgd->status_received) {
4179                 __le16 fc = ifmgd->status_fc;
4180                 bool status_acked = ifmgd->status_acked;
4181
4182                 ifmgd->status_received = false;
4183                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4184                         if (status_acked) {
4185                                 if (ifmgd->auth_data->algorithm ==
4186                                     WLAN_AUTH_SAE)
4187                                         ifmgd->auth_data->timeout =
4188                                                 jiffies +
4189                                                 IEEE80211_AUTH_TIMEOUT_SAE;
4190                                 else
4191                                         ifmgd->auth_data->timeout =
4192                                                 jiffies +
4193                                                 IEEE80211_AUTH_TIMEOUT_SHORT;
4194                                 run_again(sdata, ifmgd->auth_data->timeout);
4195                         } else {
4196                                 ifmgd->auth_data->timeout = jiffies - 1;
4197                         }
4198                         ifmgd->auth_data->timeout_started = true;
4199                 } else if (ifmgd->assoc_data &&
4200                            (ieee80211_is_assoc_req(fc) ||
4201                             ieee80211_is_reassoc_req(fc))) {
4202                         if (status_acked) {
4203                                 ifmgd->assoc_data->timeout =
4204                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4205                                 run_again(sdata, ifmgd->assoc_data->timeout);
4206                         } else {
4207                                 ifmgd->assoc_data->timeout = jiffies - 1;
4208                         }
4209                         ifmgd->assoc_data->timeout_started = true;
4210                 }
4211         }
4212
4213         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4214             time_after(jiffies, ifmgd->auth_data->timeout)) {
4215                 if (ifmgd->auth_data->done) {
4216                         /*
4217                          * ok ... we waited for assoc but userspace didn't,
4218                          * so let's just kill the auth data
4219                          */
4220                         ieee80211_destroy_auth_data(sdata, false);
4221                 } else if (ieee80211_auth(sdata)) {
4222                         u8 bssid[ETH_ALEN];
4223                         struct ieee80211_event event = {
4224                                 .type = MLME_EVENT,
4225                                 .u.mlme.data = AUTH_EVENT,
4226                                 .u.mlme.status = MLME_TIMEOUT,
4227                         };
4228
4229                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4230
4231                         ieee80211_destroy_auth_data(sdata, false);
4232
4233                         cfg80211_auth_timeout(sdata->dev, bssid);
4234                         drv_event_callback(sdata->local, sdata, &event);
4235                 }
4236         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4237                 run_again(sdata, ifmgd->auth_data->timeout);
4238
4239         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4240             time_after(jiffies, ifmgd->assoc_data->timeout)) {
4241                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4242                     ieee80211_do_assoc(sdata)) {
4243                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4244                         struct ieee80211_event event = {
4245                                 .type = MLME_EVENT,
4246                                 .u.mlme.data = ASSOC_EVENT,
4247                                 .u.mlme.status = MLME_TIMEOUT,
4248                         };
4249
4250                         ieee80211_destroy_assoc_data(sdata, false, false);
4251                         cfg80211_assoc_timeout(sdata->dev, bss);
4252                         drv_event_callback(sdata->local, sdata, &event);
4253                 }
4254         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4255                 run_again(sdata, ifmgd->assoc_data->timeout);
4256
4257         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4258             ifmgd->associated) {
4259                 u8 bssid[ETH_ALEN];
4260                 int max_tries;
4261
4262                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4263
4264                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4265                         max_tries = max_nullfunc_tries;
4266                 else
4267                         max_tries = max_probe_tries;
4268
4269                 /* ACK received for nullfunc probing frame */
4270                 if (!ifmgd->probe_send_count)
4271                         ieee80211_reset_ap_probe(sdata);
4272                 else if (ifmgd->nullfunc_failed) {
4273                         if (ifmgd->probe_send_count < max_tries) {
4274                                 mlme_dbg(sdata,
4275                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4276                                          bssid, ifmgd->probe_send_count,
4277                                          max_tries);
4278                                 ieee80211_mgd_probe_ap_send(sdata);
4279                         } else {
4280                                 mlme_dbg(sdata,
4281                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4282                                          bssid);
4283                                 ieee80211_sta_connection_lost(sdata, bssid,
4284                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4285                                         false);
4286                         }
4287                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4288                         run_again(sdata, ifmgd->probe_timeout);
4289                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4290                         mlme_dbg(sdata,
4291                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4292                                  bssid, probe_wait_ms);
4293                         ieee80211_sta_connection_lost(sdata, bssid,
4294                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4295                 } else if (ifmgd->probe_send_count < max_tries) {
4296                         mlme_dbg(sdata,
4297                                  "No probe response from AP %pM after %dms, try %d/%i\n",
4298                                  bssid, probe_wait_ms,
4299                                  ifmgd->probe_send_count, max_tries);
4300                         ieee80211_mgd_probe_ap_send(sdata);
4301                 } else {
4302                         /*
4303                          * We actually lost the connection ... or did we?
4304                          * Let's make sure!
4305                          */
4306                         mlme_dbg(sdata,
4307                                  "No probe response from AP %pM after %dms, disconnecting.\n",
4308                                  bssid, probe_wait_ms);
4309
4310                         ieee80211_sta_connection_lost(sdata, bssid,
4311                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4312                 }
4313         }
4314
4315         sdata_unlock(sdata);
4316 }
4317
4318 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4319 {
4320         struct ieee80211_sub_if_data *sdata =
4321                 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4322         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4323
4324         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4325                 return;
4326
4327         sdata->u.mgd.connection_loss = false;
4328         ieee80211_queue_work(&sdata->local->hw,
4329                              &sdata->u.mgd.beacon_connection_loss_work);
4330 }
4331
4332 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4333 {
4334         struct ieee80211_sub_if_data *sdata =
4335                 from_timer(sdata, t, u.mgd.conn_mon_timer);
4336         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4337         struct ieee80211_local *local = sdata->local;
4338
4339         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4340                 return;
4341
4342         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4343 }
4344
4345 static void ieee80211_sta_monitor_work(struct work_struct *work)
4346 {
4347         struct ieee80211_sub_if_data *sdata =
4348                 container_of(work, struct ieee80211_sub_if_data,
4349                              u.mgd.monitor_work);
4350
4351         ieee80211_mgd_probe_ap(sdata, false);
4352 }
4353
4354 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4355 {
4356         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4357                 __ieee80211_stop_poll(sdata);
4358
4359                 /* let's probe the connection once */
4360                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4361                         ieee80211_queue_work(&sdata->local->hw,
4362                                              &sdata->u.mgd.monitor_work);
4363         }
4364 }
4365
4366 #ifdef CONFIG_PM
4367 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4368 {
4369         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4370         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4371
4372         sdata_lock(sdata);
4373
4374         if (ifmgd->auth_data || ifmgd->assoc_data) {
4375                 const u8 *bssid = ifmgd->auth_data ?
4376                                 ifmgd->auth_data->bss->bssid :
4377                                 ifmgd->assoc_data->bss->bssid;
4378
4379                 /*
4380                  * If we are trying to authenticate / associate while suspending,
4381                  * cfg80211 won't know and won't actually abort those attempts,
4382                  * thus we need to do that ourselves.
4383                  */
4384                 ieee80211_send_deauth_disassoc(sdata, bssid,
4385                                                IEEE80211_STYPE_DEAUTH,
4386                                                WLAN_REASON_DEAUTH_LEAVING,
4387                                                false, frame_buf);
4388                 if (ifmgd->assoc_data)
4389                         ieee80211_destroy_assoc_data(sdata, false, true);
4390                 if (ifmgd->auth_data)
4391                         ieee80211_destroy_auth_data(sdata, false);
4392                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4393                                       IEEE80211_DEAUTH_FRAME_LEN);
4394         }
4395
4396         /* This is a bit of a hack - we should find a better and more generic
4397          * solution to this. Normally when suspending, cfg80211 will in fact
4398          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4399          * auth (not so important) or assoc (this is the problem) process.
4400          *
4401          * As a consequence, it can happen that we are in the process of both
4402          * associating and suspending, and receive an association response
4403          * after cfg80211 has checked if it needs to disconnect, but before
4404          * we actually set the flag to drop incoming frames. This will then
4405          * cause the workqueue flush to process the association response in
4406          * the suspend, resulting in a successful association just before it
4407          * tries to remove the interface from the driver, which now though
4408          * has a channel context assigned ... this results in issues.
4409          *
4410          * To work around this (for now) simply deauth here again if we're
4411          * now connected.
4412          */
4413         if (ifmgd->associated && !sdata->local->wowlan) {
4414                 u8 bssid[ETH_ALEN];
4415                 struct cfg80211_deauth_request req = {
4416                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4417                         .bssid = bssid,
4418                 };
4419
4420                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4421                 ieee80211_mgd_deauth(sdata, &req);
4422         }
4423
4424         sdata_unlock(sdata);
4425 }
4426
4427 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4428 {
4429         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4430
4431         sdata_lock(sdata);
4432         if (!ifmgd->associated) {
4433                 sdata_unlock(sdata);
4434                 return;
4435         }
4436
4437         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4438                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4439                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4440                 ieee80211_sta_connection_lost(sdata,
4441                                               ifmgd->associated->bssid,
4442                                               WLAN_REASON_UNSPECIFIED,
4443                                               true);
4444                 sdata_unlock(sdata);
4445                 return;
4446         }
4447         sdata_unlock(sdata);
4448 }
4449 #endif
4450
4451 /* interface setup */
4452 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4453 {
4454         struct ieee80211_if_managed *ifmgd;
4455
4456         ifmgd = &sdata->u.mgd;
4457         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4458         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4459         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4460                   ieee80211_beacon_connection_loss_work);
4461         INIT_WORK(&ifmgd->csa_connection_drop_work,
4462                   ieee80211_csa_connection_drop_work);
4463         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4464         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4465                           ieee80211_tdls_peer_del_work);
4466         timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4467         timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4468         timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4469         timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4470         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4471                           ieee80211_sta_handle_tspec_ac_params_wk);
4472
4473         ifmgd->flags = 0;
4474         ifmgd->powersave = sdata->wdev.ps;
4475         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4476         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4477         ifmgd->p2p_noa_index = -1;
4478
4479         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4480                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4481         else
4482                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4483
4484         /* Setup TDLS data */
4485         spin_lock_init(&ifmgd->teardown_lock);
4486         ifmgd->teardown_skb = NULL;
4487         ifmgd->orig_teardown_skb = NULL;
4488 }
4489
4490 /* scan finished notification */
4491 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4492 {
4493         struct ieee80211_sub_if_data *sdata;
4494
4495         /* Restart STA timers */
4496         rcu_read_lock();
4497         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4498                 if (ieee80211_sdata_running(sdata))
4499                         ieee80211_restart_sta_timer(sdata);
4500         }
4501         rcu_read_unlock();
4502 }
4503
4504 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4505                                      struct cfg80211_bss *cbss)
4506 {
4507         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4508         const u8 *ht_cap_ie, *vht_cap_ie;
4509         const struct ieee80211_ht_cap *ht_cap;
4510         const struct ieee80211_vht_cap *vht_cap;
4511         u8 chains = 1;
4512
4513         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4514                 return chains;
4515
4516         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4517         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4518                 ht_cap = (void *)(ht_cap_ie + 2);
4519                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4520                 /*
4521                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4522                  *       "Tx Unequal Modulation Supported" fields.
4523                  */
4524         }
4525
4526         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4527                 return chains;
4528
4529         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4530         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4531                 u8 nss;
4532                 u16 tx_mcs_map;
4533
4534                 vht_cap = (void *)(vht_cap_ie + 2);
4535                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4536                 for (nss = 8; nss > 0; nss--) {
4537                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4538                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4539                                 break;
4540                 }
4541                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4542                 chains = max(chains, nss);
4543         }
4544
4545         return chains;
4546 }
4547
4548 static bool
4549 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4550                                     const struct ieee80211_he_operation *he_op)
4551 {
4552         const struct ieee80211_sta_he_cap *sta_he_cap =
4553                 ieee80211_get_he_sta_cap(sband);
4554         u16 ap_min_req_set;
4555         int i;
4556
4557         if (!sta_he_cap || !he_op)
4558                 return false;
4559
4560         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4561
4562         /* Need to go over for 80MHz, 160MHz and for 80+80 */
4563         for (i = 0; i < 3; i++) {
4564                 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4565                         &sta_he_cap->he_mcs_nss_supp;
4566                 u16 sta_mcs_map_rx =
4567                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4568                 u16 sta_mcs_map_tx =
4569                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4570                 u8 nss;
4571                 bool verified = true;
4572
4573                 /*
4574                  * For each band there is a maximum of 8 spatial streams
4575                  * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4576                  * of 2 bits per NSS (1-8), with the values defined in enum
4577                  * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4578                  * capabilities aren't less than the AP's minimum requirements
4579                  * for this HE BSS per SS.
4580                  * It is enough to find one such band that meets the reqs.
4581                  */
4582                 for (nss = 8; nss > 0; nss--) {
4583                         u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4584                         u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4585                         u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4586
4587                         if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4588                                 continue;
4589
4590                         /*
4591                          * Make sure the HE AP doesn't require MCSs that aren't
4592                          * supported by the client
4593                          */
4594                         if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4595                             sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4596                             (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4597                                 verified = false;
4598                                 break;
4599                         }
4600                 }
4601
4602                 if (verified)
4603                         return true;
4604         }
4605
4606         /* If here, STA doesn't meet AP's HE min requirements */
4607         return false;
4608 }
4609
4610 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4611                                   struct cfg80211_bss *cbss)
4612 {
4613         struct ieee80211_local *local = sdata->local;
4614         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4615         const struct ieee80211_ht_cap *ht_cap = NULL;
4616         const struct ieee80211_ht_operation *ht_oper = NULL;
4617         const struct ieee80211_vht_operation *vht_oper = NULL;
4618         const struct ieee80211_he_operation *he_oper = NULL;
4619         struct ieee80211_supported_band *sband;
4620         struct cfg80211_chan_def chandef;
4621         int ret;
4622         u32 i;
4623         bool have_80mhz;
4624
4625         sband = local->hw.wiphy->bands[cbss->channel->band];
4626
4627         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4628                           IEEE80211_STA_DISABLE_80P80MHZ |
4629                           IEEE80211_STA_DISABLE_160MHZ);
4630
4631         rcu_read_lock();
4632
4633         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4634             sband->ht_cap.ht_supported) {
4635                 const u8 *ht_oper_ie, *ht_cap_ie;
4636
4637                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4638                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4639                         ht_oper = (void *)(ht_oper_ie + 2);
4640
4641                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4642                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4643                         ht_cap = (void *)(ht_cap_ie + 2);
4644
4645                 if (!ht_cap) {
4646                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4647                         ht_oper = NULL;
4648                 }
4649         }
4650
4651         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4652             sband->vht_cap.vht_supported) {
4653                 const u8 *vht_oper_ie, *vht_cap;
4654
4655                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4656                                                    WLAN_EID_VHT_OPERATION);
4657                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4658                         vht_oper = (void *)(vht_oper_ie + 2);
4659                 if (vht_oper && !ht_oper) {
4660                         vht_oper = NULL;
4661                         sdata_info(sdata,
4662                                    "AP advertised VHT without HT, disabling both\n");
4663                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4664                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4665                 }
4666
4667                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4668                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4669                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4670                         vht_oper = NULL;
4671                 }
4672         }
4673
4674         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
4675             ieee80211_get_he_sta_cap(sband)) {
4676                 const struct cfg80211_bss_ies *ies;
4677                 const u8 *he_oper_ie;
4678
4679                 ies = rcu_dereference(cbss->ies);
4680                 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4681                                                   ies->data, ies->len);
4682                 if (he_oper_ie &&
4683                     he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4684                         he_oper = (void *)(he_oper_ie + 3);
4685                 else
4686                         he_oper = NULL;
4687
4688                 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4689                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4690         }
4691
4692         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4693         have_80mhz = false;
4694         for (i = 0; i < sband->n_channels; i++) {
4695                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4696                                                 IEEE80211_CHAN_NO_80MHZ))
4697                         continue;
4698
4699                 have_80mhz = true;
4700                 break;
4701         }
4702
4703         if (!have_80mhz)
4704                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4705
4706         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4707                                                      cbss->channel,
4708                                                      ht_oper, vht_oper, he_oper,
4709                                                      &chandef, false);
4710
4711         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4712                                       local->rx_chains);
4713
4714         rcu_read_unlock();
4715
4716         /* will change later if needed */
4717         sdata->smps_mode = IEEE80211_SMPS_OFF;
4718
4719         mutex_lock(&local->mtx);
4720         /*
4721          * If this fails (possibly due to channel context sharing
4722          * on incompatible channels, e.g. 80+80 and 160 sharing the
4723          * same control channel) try to use a smaller bandwidth.
4724          */
4725         ret = ieee80211_vif_use_channel(sdata, &chandef,
4726                                         IEEE80211_CHANCTX_SHARED);
4727
4728         /* don't downgrade for 5 and 10 MHz channels, though. */
4729         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4730             chandef.width == NL80211_CHAN_WIDTH_10)
4731                 goto out;
4732
4733         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4734                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4735                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4736                                                 IEEE80211_CHANCTX_SHARED);
4737         }
4738  out:
4739         mutex_unlock(&local->mtx);
4740         return ret;
4741 }
4742
4743 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4744                                      struct cfg80211_bss *cbss, bool assoc,
4745                                      bool override)
4746 {
4747         struct ieee80211_local *local = sdata->local;
4748         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4749         struct ieee80211_bss *bss = (void *)cbss->priv;
4750         struct sta_info *new_sta = NULL;
4751         struct ieee80211_supported_band *sband;
4752         bool have_sta = false;
4753         int err;
4754
4755         sband = local->hw.wiphy->bands[cbss->channel->band];
4756
4757         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4758                 return -EINVAL;
4759
4760         /* If a reconfig is happening, bail out */
4761         if (local->in_reconfig)
4762                 return -EBUSY;
4763
4764         if (assoc) {
4765                 rcu_read_lock();
4766                 have_sta = sta_info_get(sdata, cbss->bssid);
4767                 rcu_read_unlock();
4768         }
4769
4770         if (!have_sta) {
4771                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4772                 if (!new_sta)
4773                         return -ENOMEM;
4774         }
4775
4776         /*
4777          * Set up the information for the new channel before setting the
4778          * new channel. We can't - completely race-free - change the basic
4779          * rates bitmap and the channel (sband) that it refers to, but if
4780          * we set it up before we at least avoid calling into the driver's
4781          * bss_info_changed() method with invalid information (since we do
4782          * call that from changing the channel - only for IDLE and perhaps
4783          * some others, but ...).
4784          *
4785          * So to avoid that, just set up all the new information before the
4786          * channel, but tell the driver to apply it only afterwards, since
4787          * it might need the new channel for that.
4788          */
4789         if (new_sta) {
4790                 u32 rates = 0, basic_rates = 0;
4791                 bool have_higher_than_11mbit = false;
4792                 int min_rate = INT_MAX, min_rate_index = -1;
4793                 const struct cfg80211_bss_ies *ies;
4794                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4795
4796                 ieee80211_get_rates(sband, bss->supp_rates,
4797                                     bss->supp_rates_len,
4798                                     &rates, &basic_rates,
4799                                     &have_higher_than_11mbit,
4800                                     &min_rate, &min_rate_index,
4801                                     shift);
4802
4803                 /*
4804                  * This used to be a workaround for basic rates missing
4805                  * in the association response frame. Now that we no
4806                  * longer use the basic rates from there, it probably
4807                  * doesn't happen any more, but keep the workaround so
4808                  * in case some *other* APs are buggy in different ways
4809                  * we can connect -- with a warning.
4810                  */
4811                 if (!basic_rates && min_rate_index >= 0) {
4812                         sdata_info(sdata,
4813                                    "No basic rates, using min rate instead\n");
4814                         basic_rates = BIT(min_rate_index);
4815                 }
4816
4817                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4818                 sdata->vif.bss_conf.basic_rates = basic_rates;
4819
4820                 /* cf. IEEE 802.11 9.2.12 */
4821                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4822                     have_higher_than_11mbit)
4823                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4824                 else
4825                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4826
4827                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4828
4829                 /* set timing information */
4830                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4831                 rcu_read_lock();
4832                 ies = rcu_dereference(cbss->beacon_ies);
4833                 if (ies) {
4834                         const u8 *tim_ie;
4835
4836                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4837                         sdata->vif.bss_conf.sync_device_ts =
4838                                 bss->device_ts_beacon;
4839                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4840                                                   ies->data, ies->len);
4841                         if (tim_ie && tim_ie[1] >= 2)
4842                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4843                         else
4844                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4845                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4846                                                TIMING_BEACON_ONLY)) {
4847                         ies = rcu_dereference(cbss->proberesp_ies);
4848                         /* must be non-NULL since beacon IEs were NULL */
4849                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4850                         sdata->vif.bss_conf.sync_device_ts =
4851                                 bss->device_ts_presp;
4852                         sdata->vif.bss_conf.sync_dtim_count = 0;
4853                 } else {
4854                         sdata->vif.bss_conf.sync_tsf = 0;
4855                         sdata->vif.bss_conf.sync_device_ts = 0;
4856                         sdata->vif.bss_conf.sync_dtim_count = 0;
4857                 }
4858                 rcu_read_unlock();
4859         }
4860
4861         if (new_sta || override) {
4862                 err = ieee80211_prep_channel(sdata, cbss);
4863                 if (err) {
4864                         if (new_sta)
4865                                 sta_info_free(local, new_sta);
4866                         return -EINVAL;
4867                 }
4868         }
4869
4870         if (new_sta) {
4871                 /*
4872                  * tell driver about BSSID, basic rates and timing
4873                  * this was set up above, before setting the channel
4874                  */
4875                 ieee80211_bss_info_change_notify(sdata,
4876                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4877                         BSS_CHANGED_BEACON_INT);
4878
4879                 if (assoc)
4880                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4881
4882                 err = sta_info_insert(new_sta);
4883                 new_sta = NULL;
4884                 if (err) {
4885                         sdata_info(sdata,
4886                                    "failed to insert STA entry for the AP (error %d)\n",
4887                                    err);
4888                         return err;
4889                 }
4890         } else
4891                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4892
4893         /* Cancel scan to ensure that nothing interferes with connection */
4894         if (local->scanning)
4895                 ieee80211_scan_cancel(local);
4896
4897         return 0;
4898 }
4899
4900 /* config hooks */
4901 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4902                        struct cfg80211_auth_request *req)
4903 {
4904         struct ieee80211_local *local = sdata->local;
4905         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4906         struct ieee80211_mgd_auth_data *auth_data;
4907         u16 auth_alg;
4908         int err;
4909
4910         /* prepare auth data structure */
4911
4912         switch (req->auth_type) {
4913         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4914                 auth_alg = WLAN_AUTH_OPEN;
4915                 break;
4916         case NL80211_AUTHTYPE_SHARED_KEY:
4917                 if (IS_ERR(local->wep_tx_tfm))
4918                         return -EOPNOTSUPP;
4919                 auth_alg = WLAN_AUTH_SHARED_KEY;
4920                 break;
4921         case NL80211_AUTHTYPE_FT:
4922                 auth_alg = WLAN_AUTH_FT;
4923                 break;
4924         case NL80211_AUTHTYPE_NETWORK_EAP:
4925                 auth_alg = WLAN_AUTH_LEAP;
4926                 break;
4927         case NL80211_AUTHTYPE_SAE:
4928                 auth_alg = WLAN_AUTH_SAE;
4929                 break;
4930         case NL80211_AUTHTYPE_FILS_SK:
4931                 auth_alg = WLAN_AUTH_FILS_SK;
4932                 break;
4933         case NL80211_AUTHTYPE_FILS_SK_PFS:
4934                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4935                 break;
4936         case NL80211_AUTHTYPE_FILS_PK:
4937                 auth_alg = WLAN_AUTH_FILS_PK;
4938                 break;
4939         default:
4940                 return -EOPNOTSUPP;
4941         }
4942
4943         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4944                             req->ie_len, GFP_KERNEL);
4945         if (!auth_data)
4946                 return -ENOMEM;
4947
4948         auth_data->bss = req->bss;
4949
4950         if (req->auth_data_len >= 4) {
4951                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4952                         __le16 *pos = (__le16 *) req->auth_data;
4953
4954                         auth_data->sae_trans = le16_to_cpu(pos[0]);
4955                         auth_data->sae_status = le16_to_cpu(pos[1]);
4956                 }
4957                 memcpy(auth_data->data, req->auth_data + 4,
4958                        req->auth_data_len - 4);
4959                 auth_data->data_len += req->auth_data_len - 4;
4960         }
4961
4962         if (req->ie && req->ie_len) {
4963                 memcpy(&auth_data->data[auth_data->data_len],
4964                        req->ie, req->ie_len);
4965                 auth_data->data_len += req->ie_len;
4966         }
4967
4968         if (req->key && req->key_len) {
4969                 auth_data->key_len = req->key_len;
4970                 auth_data->key_idx = req->key_idx;
4971                 memcpy(auth_data->key, req->key, req->key_len);
4972         }
4973
4974         auth_data->algorithm = auth_alg;
4975
4976         /* try to authenticate/probe */
4977
4978         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4979             ifmgd->assoc_data) {
4980                 err = -EBUSY;
4981                 goto err_free;
4982         }
4983
4984         if (ifmgd->auth_data)
4985                 ieee80211_destroy_auth_data(sdata, false);
4986
4987         /* prep auth_data so we don't go into idle on disassoc */
4988         ifmgd->auth_data = auth_data;
4989
4990         if (ifmgd->associated) {
4991                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4992
4993                 sdata_info(sdata,
4994                            "disconnect from AP %pM for new auth to %pM\n",
4995                            ifmgd->associated->bssid, req->bss->bssid);
4996                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4997                                        WLAN_REASON_UNSPECIFIED,
4998                                        false, frame_buf);
4999
5000                 ieee80211_report_disconnect(sdata, frame_buf,
5001                                             sizeof(frame_buf), true,
5002                                             WLAN_REASON_UNSPECIFIED);
5003         }
5004
5005         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5006
5007         err = ieee80211_prep_connection(sdata, req->bss, false, false);
5008         if (err)
5009                 goto err_clear;
5010
5011         err = ieee80211_auth(sdata);
5012         if (err) {
5013                 sta_info_destroy_addr(sdata, req->bss->bssid);
5014                 goto err_clear;
5015         }
5016
5017         /* hold our own reference */
5018         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5019         return 0;
5020
5021  err_clear:
5022         eth_zero_addr(ifmgd->bssid);
5023         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5024         ifmgd->auth_data = NULL;
5025         mutex_lock(&sdata->local->mtx);
5026         ieee80211_vif_release_channel(sdata);
5027         mutex_unlock(&sdata->local->mtx);
5028  err_free:
5029         kfree(auth_data);
5030         return err;
5031 }
5032
5033 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5034                         struct cfg80211_assoc_request *req)
5035 {
5036         struct ieee80211_local *local = sdata->local;
5037         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5038         struct ieee80211_bss *bss = (void *)req->bss->priv;
5039         struct ieee80211_mgd_assoc_data *assoc_data;
5040         const struct cfg80211_bss_ies *beacon_ies;
5041         struct ieee80211_supported_band *sband;
5042         const u8 *ssidie, *ht_ie, *vht_ie;
5043         int i, err;
5044         bool override = false;
5045
5046         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5047         if (!assoc_data)
5048                 return -ENOMEM;
5049
5050         rcu_read_lock();
5051         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5052         if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) {
5053                 rcu_read_unlock();
5054                 kfree(assoc_data);
5055                 return -EINVAL;
5056         }
5057         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5058         assoc_data->ssid_len = ssidie[1];
5059         rcu_read_unlock();
5060
5061         if (ifmgd->associated) {
5062                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5063
5064                 sdata_info(sdata,
5065                            "disconnect from AP %pM for new assoc to %pM\n",
5066                            ifmgd->associated->bssid, req->bss->bssid);
5067                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5068                                        WLAN_REASON_UNSPECIFIED,
5069                                        false, frame_buf);
5070
5071                 ieee80211_report_disconnect(sdata, frame_buf,
5072                                             sizeof(frame_buf), true,
5073                                             WLAN_REASON_UNSPECIFIED);
5074         }
5075
5076         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5077                 err = -EBUSY;
5078                 goto err_free;
5079         }
5080
5081         if (ifmgd->assoc_data) {
5082                 err = -EBUSY;
5083                 goto err_free;
5084         }
5085
5086         if (ifmgd->auth_data) {
5087                 bool match;
5088
5089                 /* keep sta info, bssid if matching */
5090                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5091                 ieee80211_destroy_auth_data(sdata, match);
5092         }
5093
5094         /* prepare assoc data */
5095
5096         ifmgd->beacon_crc_valid = false;
5097
5098         assoc_data->wmm = bss->wmm_used &&
5099                           (local->hw.queues >= IEEE80211_NUM_ACS);
5100
5101         /*
5102          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5103          * We still associate in non-HT mode (11a/b/g) if any one of these
5104          * ciphers is configured as pairwise.
5105          * We can set this to true for non-11n hardware, that'll be checked
5106          * separately along with the peer capabilities.
5107          */
5108         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5109                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5110                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5111                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5112                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5113                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5114                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5115                         netdev_info(sdata->dev,
5116                                     "disabling HE/HT/VHT due to WEP/TKIP use\n");
5117                 }
5118         }
5119
5120         /* Also disable HT if we don't support it or the AP doesn't use WMM */
5121         sband = local->hw.wiphy->bands[req->bss->channel->band];
5122         if (!sband->ht_cap.ht_supported ||
5123             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5124             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5125                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5126                 if (!bss->wmm_used &&
5127                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5128                         netdev_info(sdata->dev,
5129                                     "disabling HT as WMM/QoS is not supported by the AP\n");
5130         }
5131
5132         /* disable VHT if we don't support it or the AP doesn't use WMM */
5133         if (!sband->vht_cap.vht_supported ||
5134             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5135             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5136                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5137                 if (!bss->wmm_used &&
5138                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5139                         netdev_info(sdata->dev,
5140                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
5141         }
5142
5143         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5144         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5145                sizeof(ifmgd->ht_capa_mask));
5146
5147         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5148         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5149                sizeof(ifmgd->vht_capa_mask));
5150
5151         if (req->ie && req->ie_len) {
5152                 memcpy(assoc_data->ie, req->ie, req->ie_len);
5153                 assoc_data->ie_len = req->ie_len;
5154         }
5155
5156         if (req->fils_kek) {
5157                 /* should already be checked in cfg80211 - so warn */
5158                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5159                         err = -EINVAL;
5160                         goto err_free;
5161                 }
5162                 memcpy(assoc_data->fils_kek, req->fils_kek,
5163                        req->fils_kek_len);
5164                 assoc_data->fils_kek_len = req->fils_kek_len;
5165         }
5166
5167         if (req->fils_nonces)
5168                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5169                        2 * FILS_NONCE_LEN);
5170
5171         assoc_data->bss = req->bss;
5172
5173         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5174                 if (ifmgd->powersave)
5175                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5176                 else
5177                         sdata->smps_mode = IEEE80211_SMPS_OFF;
5178         } else
5179                 sdata->smps_mode = ifmgd->req_smps;
5180
5181         assoc_data->capability = req->bss->capability;
5182         assoc_data->supp_rates = bss->supp_rates;
5183         assoc_data->supp_rates_len = bss->supp_rates_len;
5184
5185         rcu_read_lock();
5186         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5187         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5188                 assoc_data->ap_ht_param =
5189                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5190         else
5191                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5192         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5193         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5194                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5195                        sizeof(struct ieee80211_vht_cap));
5196         else
5197                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5198         rcu_read_unlock();
5199
5200         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5201                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5202              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5203                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5204
5205         if (bss->wmm_used && bss->uapsd_supported &&
5206             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5207                 assoc_data->uapsd = true;
5208                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5209         } else {
5210                 assoc_data->uapsd = false;
5211                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5212         }
5213
5214         if (req->prev_bssid)
5215                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5216
5217         if (req->use_mfp) {
5218                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5219                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5220         } else {
5221                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5222                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5223         }
5224
5225         if (req->flags & ASSOC_REQ_USE_RRM)
5226                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5227         else
5228                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5229
5230         if (req->crypto.control_port)
5231                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5232         else
5233                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5234
5235         sdata->control_port_protocol = req->crypto.control_port_ethertype;
5236         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5237         sdata->control_port_over_nl80211 =
5238                                         req->crypto.control_port_over_nl80211;
5239         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5240                                                         sdata->vif.type);
5241
5242         /* kick off associate process */
5243
5244         ifmgd->assoc_data = assoc_data;
5245         ifmgd->dtim_period = 0;
5246         ifmgd->have_beacon = false;
5247
5248         /* override HT/VHT configuration only if the AP and we support it */
5249         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5250                 struct ieee80211_sta_ht_cap sta_ht_cap;
5251
5252                 if (req->flags & ASSOC_REQ_DISABLE_HT)
5253                         override = true;
5254
5255                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5256                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5257
5258                 /* check for 40 MHz disable override */
5259                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5260                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5261                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5262                         override = true;
5263
5264                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5265                     req->flags & ASSOC_REQ_DISABLE_VHT)
5266                         override = true;
5267         }
5268
5269         if (req->flags & ASSOC_REQ_DISABLE_HT) {
5270                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5271                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5272         }
5273
5274         if (req->flags & ASSOC_REQ_DISABLE_VHT)
5275                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5276
5277         err = ieee80211_prep_connection(sdata, req->bss, true, override);
5278         if (err)
5279                 goto err_clear;
5280
5281         rcu_read_lock();
5282         beacon_ies = rcu_dereference(req->bss->beacon_ies);
5283
5284         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5285             !beacon_ies) {
5286                 /*
5287                  * Wait up to one beacon interval ...
5288                  * should this be more if we miss one?
5289                  */
5290                 sdata_info(sdata, "waiting for beacon from %pM\n",
5291                            ifmgd->bssid);
5292                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5293                 assoc_data->timeout_started = true;
5294                 assoc_data->need_beacon = true;
5295         } else if (beacon_ies) {
5296                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
5297                                                     beacon_ies->data,
5298                                                     beacon_ies->len);
5299                 u8 dtim_count = 0;
5300
5301                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
5302                         const struct ieee80211_tim_ie *tim;
5303                         tim = (void *)(tim_ie + 2);
5304                         ifmgd->dtim_period = tim->dtim_period;
5305                         dtim_count = tim->dtim_count;
5306                 }
5307                 ifmgd->have_beacon = true;
5308                 assoc_data->timeout = jiffies;
5309                 assoc_data->timeout_started = true;
5310
5311                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5312                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5313                         sdata->vif.bss_conf.sync_device_ts =
5314                                 bss->device_ts_beacon;
5315                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5316                 }
5317         } else {
5318                 assoc_data->timeout = jiffies;
5319                 assoc_data->timeout_started = true;
5320         }
5321         rcu_read_unlock();
5322
5323         run_again(sdata, assoc_data->timeout);
5324
5325         if (bss->corrupt_data) {
5326                 char *corrupt_type = "data";
5327                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5328                         if (bss->corrupt_data &
5329                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
5330                                 corrupt_type = "beacon and probe response";
5331                         else
5332                                 corrupt_type = "beacon";
5333                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5334                         corrupt_type = "probe response";
5335                 sdata_info(sdata, "associating with AP with corrupt %s\n",
5336                            corrupt_type);
5337         }
5338
5339         return 0;
5340  err_clear:
5341         eth_zero_addr(ifmgd->bssid);
5342         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5343         ifmgd->assoc_data = NULL;
5344  err_free:
5345         kfree(assoc_data);
5346         return err;
5347 }
5348
5349 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5350                          struct cfg80211_deauth_request *req)
5351 {
5352         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5353         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5354         bool tx = !req->local_state_change;
5355
5356         if (ifmgd->auth_data &&
5357             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5358                 sdata_info(sdata,
5359                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5360                            req->bssid, req->reason_code,
5361                            ieee80211_get_reason_code_string(req->reason_code));
5362
5363                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5364                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5365                                                IEEE80211_STYPE_DEAUTH,
5366                                                req->reason_code, tx,
5367                                                frame_buf);
5368                 ieee80211_destroy_auth_data(sdata, false);
5369                 ieee80211_report_disconnect(sdata, frame_buf,
5370                                             sizeof(frame_buf), true,
5371                                             req->reason_code);
5372
5373                 return 0;
5374         }
5375
5376         if (ifmgd->assoc_data &&
5377             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5378                 sdata_info(sdata,
5379                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
5380                            req->bssid, req->reason_code,
5381                            ieee80211_get_reason_code_string(req->reason_code));
5382
5383                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5384                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5385                                                IEEE80211_STYPE_DEAUTH,
5386                                                req->reason_code, tx,
5387                                                frame_buf);
5388                 ieee80211_destroy_assoc_data(sdata, false, true);
5389                 ieee80211_report_disconnect(sdata, frame_buf,
5390                                             sizeof(frame_buf), true,
5391                                             req->reason_code);
5392                 return 0;
5393         }
5394
5395         if (ifmgd->associated &&
5396             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5397                 sdata_info(sdata,
5398                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5399                            req->bssid, req->reason_code,
5400                            ieee80211_get_reason_code_string(req->reason_code));
5401
5402                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5403                                        req->reason_code, tx, frame_buf);
5404                 ieee80211_report_disconnect(sdata, frame_buf,
5405                                             sizeof(frame_buf), true,
5406                                             req->reason_code);
5407                 return 0;
5408         }
5409
5410         return -ENOTCONN;
5411 }
5412
5413 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5414                            struct cfg80211_disassoc_request *req)
5415 {
5416         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5417         u8 bssid[ETH_ALEN];
5418         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5419
5420         /*
5421          * cfg80211 should catch this ... but it's racy since
5422          * we can receive a disassoc frame, process it, hand it
5423          * to cfg80211 while that's in a locked section already
5424          * trying to tell us that the user wants to disconnect.
5425          */
5426         if (ifmgd->associated != req->bss)
5427                 return -ENOLINK;
5428
5429         sdata_info(sdata,
5430                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5431                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5432
5433         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5434         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5435                                req->reason_code, !req->local_state_change,
5436                                frame_buf);
5437
5438         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5439                                     req->reason_code);
5440
5441         return 0;
5442 }
5443
5444 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5445 {
5446         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5447
5448         /*
5449          * Make sure some work items will not run after this,
5450          * they will not do anything but might not have been
5451          * cancelled when disconnecting.
5452          */
5453         cancel_work_sync(&ifmgd->monitor_work);
5454         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5455         cancel_work_sync(&ifmgd->request_smps_work);
5456         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5457         cancel_work_sync(&ifmgd->chswitch_work);
5458         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5459
5460         sdata_lock(sdata);
5461         if (ifmgd->assoc_data) {
5462                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5463                 ieee80211_destroy_assoc_data(sdata, false, false);
5464                 cfg80211_assoc_timeout(sdata->dev, bss);
5465         }
5466         if (ifmgd->auth_data)
5467                 ieee80211_destroy_auth_data(sdata, false);
5468         spin_lock_bh(&ifmgd->teardown_lock);
5469         if (ifmgd->teardown_skb) {
5470                 kfree_skb(ifmgd->teardown_skb);
5471                 ifmgd->teardown_skb = NULL;
5472                 ifmgd->orig_teardown_skb = NULL;
5473         }
5474         spin_unlock_bh(&ifmgd->teardown_lock);
5475         del_timer_sync(&ifmgd->timer);
5476         sdata_unlock(sdata);
5477 }
5478
5479 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5480                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5481                                s32 rssi_level,
5482                                gfp_t gfp)
5483 {
5484         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5485
5486         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5487
5488         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5489 }
5490 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5491
5492 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5493 {
5494         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5495
5496         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5497
5498         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5499 }
5500 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);