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         /* XXX: shouldn't really modify cfg80211-owned data! */
1160         ifmgd->associated->channel = sdata->csa_chandef.chan;
1161
1162         ifmgd->csa_waiting_bcn = true;
1163
1164         ieee80211_sta_reset_beacon_monitor(sdata);
1165         ieee80211_sta_reset_conn_monitor(sdata);
1166
1167 out:
1168         mutex_unlock(&local->chanctx_mtx);
1169         mutex_unlock(&local->mtx);
1170         sdata_unlock(sdata);
1171 }
1172
1173 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1174 {
1175         struct ieee80211_local *local = sdata->local;
1176         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1177         int ret;
1178
1179         sdata_assert_lock(sdata);
1180
1181         WARN_ON(!sdata->vif.csa_active);
1182
1183         if (sdata->csa_block_tx) {
1184                 ieee80211_wake_vif_queues(local, sdata,
1185                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1186                 sdata->csa_block_tx = false;
1187         }
1188
1189         sdata->vif.csa_active = false;
1190         ifmgd->csa_waiting_bcn = false;
1191
1192         ret = drv_post_channel_switch(sdata);
1193         if (ret) {
1194                 sdata_info(sdata,
1195                            "driver post channel switch failed, disconnecting\n");
1196                 ieee80211_queue_work(&local->hw,
1197                                      &ifmgd->csa_connection_drop_work);
1198                 return;
1199         }
1200
1201         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1202 }
1203
1204 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1205 {
1206         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1207         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1208
1209         trace_api_chswitch_done(sdata, success);
1210         if (!success) {
1211                 sdata_info(sdata,
1212                            "driver channel switch failed, disconnecting\n");
1213                 ieee80211_queue_work(&sdata->local->hw,
1214                                      &ifmgd->csa_connection_drop_work);
1215         } else {
1216                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1217         }
1218 }
1219 EXPORT_SYMBOL(ieee80211_chswitch_done);
1220
1221 static void ieee80211_chswitch_timer(struct timer_list *t)
1222 {
1223         struct ieee80211_sub_if_data *sdata =
1224                 from_timer(sdata, t, u.mgd.chswitch_timer);
1225
1226         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1227 }
1228
1229 static void
1230 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1231                                  u64 timestamp, u32 device_timestamp,
1232                                  struct ieee802_11_elems *elems,
1233                                  bool beacon)
1234 {
1235         struct ieee80211_local *local = sdata->local;
1236         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1237         struct cfg80211_bss *cbss = ifmgd->associated;
1238         struct ieee80211_chanctx_conf *conf;
1239         struct ieee80211_chanctx *chanctx;
1240         enum nl80211_band current_band;
1241         struct ieee80211_csa_ie csa_ie;
1242         struct ieee80211_channel_switch ch_switch;
1243         int res;
1244
1245         sdata_assert_lock(sdata);
1246
1247         if (!cbss)
1248                 return;
1249
1250         if (local->scanning)
1251                 return;
1252
1253         /* disregard subsequent announcements if we are already processing */
1254         if (sdata->vif.csa_active)
1255                 return;
1256
1257         current_band = cbss->channel->band;
1258         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1259                                            ifmgd->flags,
1260                                            ifmgd->associated->bssid, &csa_ie);
1261         if (res < 0)
1262                 ieee80211_queue_work(&local->hw,
1263                                      &ifmgd->csa_connection_drop_work);
1264         if (res)
1265                 return;
1266
1267         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1268                                      IEEE80211_CHAN_DISABLED)) {
1269                 sdata_info(sdata,
1270                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1271                            ifmgd->associated->bssid,
1272                            csa_ie.chandef.chan->center_freq,
1273                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1274                            csa_ie.chandef.center_freq2);
1275                 ieee80211_queue_work(&local->hw,
1276                                      &ifmgd->csa_connection_drop_work);
1277                 return;
1278         }
1279
1280         if (cfg80211_chandef_identical(&csa_ie.chandef,
1281                                        &sdata->vif.bss_conf.chandef)) {
1282                 if (ifmgd->csa_ignored_same_chan)
1283                         return;
1284                 sdata_info(sdata,
1285                            "AP %pM tries to chanswitch to same channel, ignore\n",
1286                            ifmgd->associated->bssid);
1287                 ifmgd->csa_ignored_same_chan = true;
1288                 return;
1289         }
1290
1291         /*
1292          * Drop all TDLS peers - either we disconnect or move to a different
1293          * channel from this point on. There's no telling what our peer will do.
1294          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1295          * have an incompatible wider chandef.
1296          */
1297         ieee80211_teardown_tdls_peers(sdata);
1298
1299         mutex_lock(&local->mtx);
1300         mutex_lock(&local->chanctx_mtx);
1301         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1302                                          lockdep_is_held(&local->chanctx_mtx));
1303         if (!conf) {
1304                 sdata_info(sdata,
1305                            "no channel context assigned to vif?, disconnecting\n");
1306                 goto drop_connection;
1307         }
1308
1309         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1310
1311         if (local->use_chanctx &&
1312             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1313                 sdata_info(sdata,
1314                            "driver doesn't support chan-switch with channel contexts\n");
1315                 goto drop_connection;
1316         }
1317
1318         ch_switch.timestamp = timestamp;
1319         ch_switch.device_timestamp = device_timestamp;
1320         ch_switch.block_tx = csa_ie.mode;
1321         ch_switch.chandef = csa_ie.chandef;
1322         ch_switch.count = csa_ie.count;
1323
1324         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1325                 sdata_info(sdata,
1326                            "preparing for channel switch failed, disconnecting\n");
1327                 goto drop_connection;
1328         }
1329
1330         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1331                                             chanctx->mode, false);
1332         if (res) {
1333                 sdata_info(sdata,
1334                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1335                            res);
1336                 goto drop_connection;
1337         }
1338         mutex_unlock(&local->chanctx_mtx);
1339
1340         sdata->vif.csa_active = true;
1341         sdata->csa_chandef = csa_ie.chandef;
1342         sdata->csa_block_tx = csa_ie.mode;
1343         ifmgd->csa_ignored_same_chan = false;
1344
1345         if (sdata->csa_block_tx)
1346                 ieee80211_stop_vif_queues(local, sdata,
1347                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1348         mutex_unlock(&local->mtx);
1349
1350         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1351                                           csa_ie.count);
1352
1353         if (local->ops->channel_switch) {
1354                 /* use driver's channel switch callback */
1355                 drv_channel_switch(local, sdata, &ch_switch);
1356                 return;
1357         }
1358
1359         /* channel switch handled in software */
1360         if (csa_ie.count <= 1)
1361                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1362         else
1363                 mod_timer(&ifmgd->chswitch_timer,
1364                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1365                                          cbss->beacon_interval));
1366         return;
1367  drop_connection:
1368         /*
1369          * This is just so that the disconnect flow will know that
1370          * we were trying to switch channel and failed. In case the
1371          * mode is 1 (we are not allowed to Tx), we will know not to
1372          * send a deauthentication frame. Those two fields will be
1373          * reset when the disconnection worker runs.
1374          */
1375         sdata->vif.csa_active = true;
1376         sdata->csa_block_tx = csa_ie.mode;
1377
1378         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1379         mutex_unlock(&local->chanctx_mtx);
1380         mutex_unlock(&local->mtx);
1381 }
1382
1383 static bool
1384 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1385                                  struct ieee80211_channel *channel,
1386                                  const u8 *country_ie, u8 country_ie_len,
1387                                  const u8 *pwr_constr_elem,
1388                                  int *chan_pwr, int *pwr_reduction)
1389 {
1390         struct ieee80211_country_ie_triplet *triplet;
1391         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1392         int i, chan_increment;
1393         bool have_chan_pwr = false;
1394
1395         /* Invalid IE */
1396         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1397                 return false;
1398
1399         triplet = (void *)(country_ie + 3);
1400         country_ie_len -= 3;
1401
1402         switch (channel->band) {
1403         default:
1404                 WARN_ON_ONCE(1);
1405                 /* fall through */
1406         case NL80211_BAND_2GHZ:
1407         case NL80211_BAND_60GHZ:
1408                 chan_increment = 1;
1409                 break;
1410         case NL80211_BAND_5GHZ:
1411                 chan_increment = 4;
1412                 break;
1413         }
1414
1415         /* find channel */
1416         while (country_ie_len >= 3) {
1417                 u8 first_channel = triplet->chans.first_channel;
1418
1419                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1420                         goto next;
1421
1422                 for (i = 0; i < triplet->chans.num_channels; i++) {
1423                         if (first_channel + i * chan_increment == chan) {
1424                                 have_chan_pwr = true;
1425                                 *chan_pwr = triplet->chans.max_power;
1426                                 break;
1427                         }
1428                 }
1429                 if (have_chan_pwr)
1430                         break;
1431
1432  next:
1433                 triplet++;
1434                 country_ie_len -= 3;
1435         }
1436
1437         if (have_chan_pwr && pwr_constr_elem)
1438                 *pwr_reduction = *pwr_constr_elem;
1439         else
1440                 *pwr_reduction = 0;
1441
1442         return have_chan_pwr;
1443 }
1444
1445 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1446                                       struct ieee80211_channel *channel,
1447                                       const u8 *cisco_dtpc_ie,
1448                                       int *pwr_level)
1449 {
1450         /* From practical testing, the first data byte of the DTPC element
1451          * seems to contain the requested dBm level, and the CLI on Cisco
1452          * APs clearly state the range is -127 to 127 dBm, which indicates
1453          * a signed byte, although it seemingly never actually goes negative.
1454          * The other byte seems to always be zero.
1455          */
1456         *pwr_level = (__s8)cisco_dtpc_ie[4];
1457 }
1458
1459 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1460                                        struct ieee80211_channel *channel,
1461                                        struct ieee80211_mgmt *mgmt,
1462                                        const u8 *country_ie, u8 country_ie_len,
1463                                        const u8 *pwr_constr_ie,
1464                                        const u8 *cisco_dtpc_ie)
1465 {
1466         bool has_80211h_pwr = false, has_cisco_pwr = false;
1467         int chan_pwr = 0, pwr_reduction_80211h = 0;
1468         int pwr_level_cisco, pwr_level_80211h;
1469         int new_ap_level;
1470         __le16 capab = mgmt->u.probe_resp.capab_info;
1471
1472         if (country_ie &&
1473             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1474              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1475                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1476                         sdata, channel, country_ie, country_ie_len,
1477                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1478                 pwr_level_80211h =
1479                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1480         }
1481
1482         if (cisco_dtpc_ie) {
1483                 ieee80211_find_cisco_dtpc(
1484                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1485                 has_cisco_pwr = true;
1486         }
1487
1488         if (!has_80211h_pwr && !has_cisco_pwr)
1489                 return 0;
1490
1491         /* If we have both 802.11h and Cisco DTPC, apply both limits
1492          * by picking the smallest of the two power levels advertised.
1493          */
1494         if (has_80211h_pwr &&
1495             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1496                 new_ap_level = pwr_level_80211h;
1497
1498                 if (sdata->ap_power_level == new_ap_level)
1499                         return 0;
1500
1501                 sdata_dbg(sdata,
1502                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1503                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1504                           sdata->u.mgd.bssid);
1505         } else {  /* has_cisco_pwr is always true here. */
1506                 new_ap_level = pwr_level_cisco;
1507
1508                 if (sdata->ap_power_level == new_ap_level)
1509                         return 0;
1510
1511                 sdata_dbg(sdata,
1512                           "Limiting TX power to %d dBm as advertised by %pM\n",
1513                           pwr_level_cisco, sdata->u.mgd.bssid);
1514         }
1515
1516         sdata->ap_power_level = new_ap_level;
1517         if (__ieee80211_recalc_txpower(sdata))
1518                 return BSS_CHANGED_TXPOWER;
1519         return 0;
1520 }
1521
1522 /* powersave */
1523 static void ieee80211_enable_ps(struct ieee80211_local *local,
1524                                 struct ieee80211_sub_if_data *sdata)
1525 {
1526         struct ieee80211_conf *conf = &local->hw.conf;
1527
1528         /*
1529          * If we are scanning right now then the parameters will
1530          * take effect when scan finishes.
1531          */
1532         if (local->scanning)
1533                 return;
1534
1535         if (conf->dynamic_ps_timeout > 0 &&
1536             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1537                 mod_timer(&local->dynamic_ps_timer, jiffies +
1538                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1539         } else {
1540                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1541                         ieee80211_send_nullfunc(local, sdata, true);
1542
1543                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1544                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1545                         return;
1546
1547                 conf->flags |= IEEE80211_CONF_PS;
1548                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1549         }
1550 }
1551
1552 static void ieee80211_change_ps(struct ieee80211_local *local)
1553 {
1554         struct ieee80211_conf *conf = &local->hw.conf;
1555
1556         if (local->ps_sdata) {
1557                 ieee80211_enable_ps(local, local->ps_sdata);
1558         } else if (conf->flags & IEEE80211_CONF_PS) {
1559                 conf->flags &= ~IEEE80211_CONF_PS;
1560                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1561                 del_timer_sync(&local->dynamic_ps_timer);
1562                 cancel_work_sync(&local->dynamic_ps_enable_work);
1563         }
1564 }
1565
1566 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1567 {
1568         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1569         struct sta_info *sta = NULL;
1570         bool authorized = false;
1571
1572         if (!mgd->powersave)
1573                 return false;
1574
1575         if (mgd->broken_ap)
1576                 return false;
1577
1578         if (!mgd->associated)
1579                 return false;
1580
1581         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1582                 return false;
1583
1584         if (!mgd->have_beacon)
1585                 return false;
1586
1587         rcu_read_lock();
1588         sta = sta_info_get(sdata, mgd->bssid);
1589         if (sta)
1590                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1591         rcu_read_unlock();
1592
1593         return authorized;
1594 }
1595
1596 /* need to hold RTNL or interface lock */
1597 void ieee80211_recalc_ps(struct ieee80211_local *local)
1598 {
1599         struct ieee80211_sub_if_data *sdata, *found = NULL;
1600         int count = 0;
1601         int timeout;
1602
1603         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1604                 local->ps_sdata = NULL;
1605                 return;
1606         }
1607
1608         list_for_each_entry(sdata, &local->interfaces, list) {
1609                 if (!ieee80211_sdata_running(sdata))
1610                         continue;
1611                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1612                         /* If an AP vif is found, then disable PS
1613                          * by setting the count to zero thereby setting
1614                          * ps_sdata to NULL.
1615                          */
1616                         count = 0;
1617                         break;
1618                 }
1619                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1620                         continue;
1621                 found = sdata;
1622                 count++;
1623         }
1624
1625         if (count == 1 && ieee80211_powersave_allowed(found)) {
1626                 u8 dtimper = found->u.mgd.dtim_period;
1627
1628                 timeout = local->dynamic_ps_forced_timeout;
1629                 if (timeout < 0)
1630                         timeout = 100;
1631                 local->hw.conf.dynamic_ps_timeout = timeout;
1632
1633                 /* If the TIM IE is invalid, pretend the value is 1 */
1634                 if (!dtimper)
1635                         dtimper = 1;
1636
1637                 local->hw.conf.ps_dtim_period = dtimper;
1638                 local->ps_sdata = found;
1639         } else {
1640                 local->ps_sdata = NULL;
1641         }
1642
1643         ieee80211_change_ps(local);
1644 }
1645
1646 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1647 {
1648         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1649
1650         if (sdata->vif.bss_conf.ps != ps_allowed) {
1651                 sdata->vif.bss_conf.ps = ps_allowed;
1652                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1653         }
1654 }
1655
1656 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1657 {
1658         struct ieee80211_local *local =
1659                 container_of(work, struct ieee80211_local,
1660                              dynamic_ps_disable_work);
1661
1662         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1663                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1664                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1665         }
1666
1667         ieee80211_wake_queues_by_reason(&local->hw,
1668                                         IEEE80211_MAX_QUEUE_MAP,
1669                                         IEEE80211_QUEUE_STOP_REASON_PS,
1670                                         false);
1671 }
1672
1673 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1674 {
1675         struct ieee80211_local *local =
1676                 container_of(work, struct ieee80211_local,
1677                              dynamic_ps_enable_work);
1678         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1679         struct ieee80211_if_managed *ifmgd;
1680         unsigned long flags;
1681         int q;
1682
1683         /* can only happen when PS was just disabled anyway */
1684         if (!sdata)
1685                 return;
1686
1687         ifmgd = &sdata->u.mgd;
1688
1689         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1690                 return;
1691
1692         if (local->hw.conf.dynamic_ps_timeout > 0) {
1693                 /* don't enter PS if TX frames are pending */
1694                 if (drv_tx_frames_pending(local)) {
1695                         mod_timer(&local->dynamic_ps_timer, jiffies +
1696                                   msecs_to_jiffies(
1697                                   local->hw.conf.dynamic_ps_timeout));
1698                         return;
1699                 }
1700
1701                 /*
1702                  * transmission can be stopped by others which leads to
1703                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1704                  * is not the actual idle state.
1705                  */
1706                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1707                 for (q = 0; q < local->hw.queues; q++) {
1708                         if (local->queue_stop_reasons[q]) {
1709                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1710                                                        flags);
1711                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1712                                           msecs_to_jiffies(
1713                                           local->hw.conf.dynamic_ps_timeout));
1714                                 return;
1715                         }
1716                 }
1717                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1718         }
1719
1720         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1721             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1722                 if (drv_tx_frames_pending(local)) {
1723                         mod_timer(&local->dynamic_ps_timer, jiffies +
1724                                   msecs_to_jiffies(
1725                                   local->hw.conf.dynamic_ps_timeout));
1726                 } else {
1727                         ieee80211_send_nullfunc(local, sdata, true);
1728                         /* Flush to get the tx status of nullfunc frame */
1729                         ieee80211_flush_queues(local, sdata, false);
1730                 }
1731         }
1732
1733         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1734               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1735             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1736                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1737                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1738                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1739         }
1740 }
1741
1742 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1743 {
1744         struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1745
1746         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1747 }
1748
1749 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1750 {
1751         struct delayed_work *delayed_work = to_delayed_work(work);
1752         struct ieee80211_sub_if_data *sdata =
1753                 container_of(delayed_work, struct ieee80211_sub_if_data,
1754                              dfs_cac_timer_work);
1755         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1756
1757         mutex_lock(&sdata->local->mtx);
1758         if (sdata->wdev.cac_started) {
1759                 ieee80211_vif_release_channel(sdata);
1760                 cfg80211_cac_event(sdata->dev, &chandef,
1761                                    NL80211_RADAR_CAC_FINISHED,
1762                                    GFP_KERNEL);
1763         }
1764         mutex_unlock(&sdata->local->mtx);
1765 }
1766
1767 static bool
1768 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1769 {
1770         struct ieee80211_local *local = sdata->local;
1771         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1772         bool ret = false;
1773         int ac;
1774
1775         if (local->hw.queues < IEEE80211_NUM_ACS)
1776                 return false;
1777
1778         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1779                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1780                 int non_acm_ac;
1781                 unsigned long now = jiffies;
1782
1783                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1784                     tx_tspec->admitted_time &&
1785                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1786                         tx_tspec->consumed_tx_time = 0;
1787                         tx_tspec->time_slice_start = now;
1788
1789                         if (tx_tspec->downgraded)
1790                                 tx_tspec->action =
1791                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1792                 }
1793
1794                 switch (tx_tspec->action) {
1795                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1796                         /* take the original parameters */
1797                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1798                                 sdata_err(sdata,
1799                                           "failed to set TX queue parameters for queue %d\n",
1800                                           ac);
1801                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1802                         tx_tspec->downgraded = false;
1803                         ret = true;
1804                         break;
1805                 case TX_TSPEC_ACTION_DOWNGRADE:
1806                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1807                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1808                                 ret = true;
1809                                 break;
1810                         }
1811                         /* downgrade next lower non-ACM AC */
1812                         for (non_acm_ac = ac + 1;
1813                              non_acm_ac < IEEE80211_NUM_ACS;
1814                              non_acm_ac++)
1815                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1816                                         break;
1817                         /* Usually the loop will result in using BK even if it
1818                          * requires admission control, but such a configuration
1819                          * makes no sense and we have to transmit somehow - the
1820                          * AC selection does the same thing.
1821                          * If we started out trying to downgrade from BK, then
1822                          * the extra condition here might be needed.
1823                          */
1824                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1825                                 non_acm_ac = IEEE80211_AC_BK;
1826                         if (drv_conf_tx(local, sdata, ac,
1827                                         &sdata->tx_conf[non_acm_ac]))
1828                                 sdata_err(sdata,
1829                                           "failed to set TX queue parameters for queue %d\n",
1830                                           ac);
1831                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1832                         ret = true;
1833                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1834                                 tx_tspec->time_slice_start + HZ - now + 1);
1835                         break;
1836                 case TX_TSPEC_ACTION_NONE:
1837                         /* nothing now */
1838                         break;
1839                 }
1840         }
1841
1842         return ret;
1843 }
1844
1845 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1846 {
1847         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1848                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1849 }
1850
1851 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1852 {
1853         struct ieee80211_sub_if_data *sdata;
1854
1855         sdata = container_of(work, struct ieee80211_sub_if_data,
1856                              u.mgd.tx_tspec_wk.work);
1857         ieee80211_sta_handle_tspec_ac_params(sdata);
1858 }
1859
1860 /* MLME */
1861 static bool
1862 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1863                          struct ieee80211_sub_if_data *sdata,
1864                          const u8 *wmm_param, size_t wmm_param_len,
1865                          const struct ieee80211_mu_edca_param_set *mu_edca)
1866 {
1867         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1868         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1869         size_t left;
1870         int count, ac;
1871         const u8 *pos;
1872         u8 uapsd_queues = 0;
1873
1874         if (!local->ops->conf_tx)
1875                 return false;
1876
1877         if (local->hw.queues < IEEE80211_NUM_ACS)
1878                 return false;
1879
1880         if (!wmm_param)
1881                 return false;
1882
1883         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1884                 return false;
1885
1886         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1887                 uapsd_queues = ifmgd->uapsd_queues;
1888
1889         count = wmm_param[6] & 0x0f;
1890         if (count == ifmgd->wmm_last_param_set)
1891                 return false;
1892         ifmgd->wmm_last_param_set = count;
1893
1894         pos = wmm_param + 8;
1895         left = wmm_param_len - 8;
1896
1897         memset(&params, 0, sizeof(params));
1898
1899         sdata->wmm_acm = 0;
1900         for (; left >= 4; left -= 4, pos += 4) {
1901                 int aci = (pos[0] >> 5) & 0x03;
1902                 int acm = (pos[0] >> 4) & 0x01;
1903                 bool uapsd = false;
1904
1905                 switch (aci) {
1906                 case 1: /* AC_BK */
1907                         ac = IEEE80211_AC_BK;
1908                         if (acm)
1909                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1910                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1911                                 uapsd = true;
1912                         params[ac].mu_edca = !!mu_edca;
1913                         if (mu_edca)
1914                                 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
1915                         break;
1916                 case 2: /* AC_VI */
1917                         ac = IEEE80211_AC_VI;
1918                         if (acm)
1919                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1920                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1921                                 uapsd = true;
1922                         params[ac].mu_edca = !!mu_edca;
1923                         if (mu_edca)
1924                                 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
1925                         break;
1926                 case 3: /* AC_VO */
1927                         ac = IEEE80211_AC_VO;
1928                         if (acm)
1929                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1930                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1931                                 uapsd = true;
1932                         params[ac].mu_edca = !!mu_edca;
1933                         if (mu_edca)
1934                                 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
1935                         break;
1936                 case 0: /* AC_BE */
1937                 default:
1938                         ac = IEEE80211_AC_BE;
1939                         if (acm)
1940                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1941                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1942                                 uapsd = true;
1943                         params[ac].mu_edca = !!mu_edca;
1944                         if (mu_edca)
1945                                 params[ac].mu_edca_param_rec = mu_edca->ac_be;
1946                         break;
1947                 }
1948
1949                 params[ac].aifs = pos[0] & 0x0f;
1950
1951                 if (params[ac].aifs < 2) {
1952                         sdata_info(sdata,
1953                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1954                                    params[ac].aifs, aci);
1955                         params[ac].aifs = 2;
1956                 }
1957                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1958                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1959                 params[ac].txop = get_unaligned_le16(pos + 2);
1960                 params[ac].acm = acm;
1961                 params[ac].uapsd = uapsd;
1962
1963                 if (params[ac].cw_min == 0 ||
1964                     params[ac].cw_min > params[ac].cw_max) {
1965                         sdata_info(sdata,
1966                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1967                                    params[ac].cw_min, params[ac].cw_max, aci);
1968                         return false;
1969                 }
1970                 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
1971         }
1972
1973         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1974                 mlme_dbg(sdata,
1975                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1976                          ac, params[ac].acm,
1977                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1978                          params[ac].txop, params[ac].uapsd,
1979                          ifmgd->tx_tspec[ac].downgraded);
1980                 sdata->tx_conf[ac] = params[ac];
1981                 if (!ifmgd->tx_tspec[ac].downgraded &&
1982                     drv_conf_tx(local, sdata, ac, &params[ac]))
1983                         sdata_err(sdata,
1984                                   "failed to set TX queue parameters for AC %d\n",
1985                                   ac);
1986         }
1987
1988         /* enable WMM or activate new settings */
1989         sdata->vif.bss_conf.qos = true;
1990         return true;
1991 }
1992
1993 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1994 {
1995         lockdep_assert_held(&sdata->local->mtx);
1996
1997         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1998         ieee80211_run_deferred_scan(sdata->local);
1999 }
2000
2001 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2002 {
2003         mutex_lock(&sdata->local->mtx);
2004         __ieee80211_stop_poll(sdata);
2005         mutex_unlock(&sdata->local->mtx);
2006 }
2007
2008 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2009                                            u16 capab, bool erp_valid, u8 erp)
2010 {
2011         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2012         struct ieee80211_supported_band *sband;
2013         u32 changed = 0;
2014         bool use_protection;
2015         bool use_short_preamble;
2016         bool use_short_slot;
2017
2018         sband = ieee80211_get_sband(sdata);
2019         if (!sband)
2020                 return changed;
2021
2022         if (erp_valid) {
2023                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2024                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2025         } else {
2026                 use_protection = false;
2027                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2028         }
2029
2030         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2031         if (sband->band == NL80211_BAND_5GHZ)
2032                 use_short_slot = true;
2033
2034         if (use_protection != bss_conf->use_cts_prot) {
2035                 bss_conf->use_cts_prot = use_protection;
2036                 changed |= BSS_CHANGED_ERP_CTS_PROT;
2037         }
2038
2039         if (use_short_preamble != bss_conf->use_short_preamble) {
2040                 bss_conf->use_short_preamble = use_short_preamble;
2041                 changed |= BSS_CHANGED_ERP_PREAMBLE;
2042         }
2043
2044         if (use_short_slot != bss_conf->use_short_slot) {
2045                 bss_conf->use_short_slot = use_short_slot;
2046                 changed |= BSS_CHANGED_ERP_SLOT;
2047         }
2048
2049         return changed;
2050 }
2051
2052 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2053                                      struct cfg80211_bss *cbss,
2054                                      u32 bss_info_changed)
2055 {
2056         struct ieee80211_bss *bss = (void *)cbss->priv;
2057         struct ieee80211_local *local = sdata->local;
2058         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2059
2060         bss_info_changed |= BSS_CHANGED_ASSOC;
2061         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2062                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2063
2064         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2065                 beacon_loss_count * bss_conf->beacon_int));
2066
2067         sdata->u.mgd.associated = cbss;
2068         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2069
2070         ieee80211_check_rate_mask(sdata);
2071
2072         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2073
2074         if (sdata->vif.p2p ||
2075             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2076                 const struct cfg80211_bss_ies *ies;
2077
2078                 rcu_read_lock();
2079                 ies = rcu_dereference(cbss->ies);
2080                 if (ies) {
2081                         int ret;
2082
2083                         ret = cfg80211_get_p2p_attr(
2084                                         ies->data, ies->len,
2085                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2086                                         (u8 *) &bss_conf->p2p_noa_attr,
2087                                         sizeof(bss_conf->p2p_noa_attr));
2088                         if (ret >= 2) {
2089                                 sdata->u.mgd.p2p_noa_index =
2090                                         bss_conf->p2p_noa_attr.index;
2091                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
2092                         }
2093                 }
2094                 rcu_read_unlock();
2095         }
2096
2097         /* just to be sure */
2098         ieee80211_stop_poll(sdata);
2099
2100         ieee80211_led_assoc(local, 1);
2101
2102         if (sdata->u.mgd.have_beacon) {
2103                 /*
2104                  * If the AP is buggy we may get here with no DTIM period
2105                  * known, so assume it's 1 which is the only safe assumption
2106                  * in that case, although if the TIM IE is broken powersave
2107                  * probably just won't work at all.
2108                  */
2109                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2110                 bss_conf->beacon_rate = bss->beacon_rate;
2111                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2112         } else {
2113                 bss_conf->beacon_rate = NULL;
2114                 bss_conf->dtim_period = 0;
2115         }
2116
2117         bss_conf->assoc = 1;
2118
2119         /* Tell the driver to monitor connection quality (if supported) */
2120         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2121             bss_conf->cqm_rssi_thold)
2122                 bss_info_changed |= BSS_CHANGED_CQM;
2123
2124         /* Enable ARP filtering */
2125         if (bss_conf->arp_addr_cnt)
2126                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2127
2128         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2129
2130         mutex_lock(&local->iflist_mtx);
2131         ieee80211_recalc_ps(local);
2132         mutex_unlock(&local->iflist_mtx);
2133
2134         ieee80211_recalc_smps(sdata);
2135         ieee80211_recalc_ps_vif(sdata);
2136
2137         netif_carrier_on(sdata->dev);
2138 }
2139
2140 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2141                                    u16 stype, u16 reason, bool tx,
2142                                    u8 *frame_buf)
2143 {
2144         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2145         struct ieee80211_local *local = sdata->local;
2146         u32 changed = 0;
2147
2148         sdata_assert_lock(sdata);
2149
2150         if (WARN_ON_ONCE(tx && !frame_buf))
2151                 return;
2152
2153         if (WARN_ON(!ifmgd->associated))
2154                 return;
2155
2156         ieee80211_stop_poll(sdata);
2157
2158         ifmgd->associated = NULL;
2159         netif_carrier_off(sdata->dev);
2160
2161         /*
2162          * if we want to get out of ps before disassoc (why?) we have
2163          * to do it before sending disassoc, as otherwise the null-packet
2164          * won't be valid.
2165          */
2166         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2167                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2168                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2169         }
2170         local->ps_sdata = NULL;
2171
2172         /* disable per-vif ps */
2173         ieee80211_recalc_ps_vif(sdata);
2174
2175         /* make sure ongoing transmission finishes */
2176         synchronize_net();
2177
2178         /*
2179          * drop any frame before deauth/disassoc, this can be data or
2180          * management frame. Since we are disconnecting, we should not
2181          * insist sending these frames which can take time and delay
2182          * the disconnection and possible the roaming.
2183          */
2184         if (tx)
2185                 ieee80211_flush_queues(local, sdata, true);
2186
2187         /* deauthenticate/disassociate now */
2188         if (tx || frame_buf) {
2189                 /*
2190                  * In multi channel scenarios guarantee that the virtual
2191                  * interface is granted immediate airtime to transmit the
2192                  * deauthentication frame by calling mgd_prepare_tx, if the
2193                  * driver requested so.
2194                  */
2195                 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2196                     !ifmgd->have_beacon)
2197                         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2198
2199                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2200                                                reason, tx, frame_buf);
2201         }
2202
2203         /* flush out frame - make sure the deauth was actually sent */
2204         if (tx)
2205                 ieee80211_flush_queues(local, sdata, false);
2206
2207         /* clear bssid only after building the needed mgmt frames */
2208         eth_zero_addr(ifmgd->bssid);
2209
2210         /* remove AP and TDLS peers */
2211         sta_info_flush(sdata);
2212
2213         /* finally reset all BSS / config parameters */
2214         changed |= ieee80211_reset_erp_info(sdata);
2215
2216         ieee80211_led_assoc(local, 0);
2217         changed |= BSS_CHANGED_ASSOC;
2218         sdata->vif.bss_conf.assoc = false;
2219
2220         ifmgd->p2p_noa_index = -1;
2221         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2222                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2223
2224         /* on the next assoc, re-program HT/VHT parameters */
2225         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2226         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2227         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2228         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2229
2230         /* reset MU-MIMO ownership and group data */
2231         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2232                sizeof(sdata->vif.bss_conf.mu_group.membership));
2233         memset(sdata->vif.bss_conf.mu_group.position, 0,
2234                sizeof(sdata->vif.bss_conf.mu_group.position));
2235         changed |= BSS_CHANGED_MU_GROUPS;
2236         sdata->vif.mu_mimo_owner = false;
2237
2238         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2239
2240         del_timer_sync(&local->dynamic_ps_timer);
2241         cancel_work_sync(&local->dynamic_ps_enable_work);
2242
2243         /* Disable ARP filtering */
2244         if (sdata->vif.bss_conf.arp_addr_cnt)
2245                 changed |= BSS_CHANGED_ARP_FILTER;
2246
2247         sdata->vif.bss_conf.qos = false;
2248         changed |= BSS_CHANGED_QOS;
2249
2250         /* The BSSID (not really interesting) and HT changed */
2251         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2252         ieee80211_bss_info_change_notify(sdata, changed);
2253
2254         /* disassociated - set to defaults now */
2255         ieee80211_set_wmm_default(sdata, false, false);
2256
2257         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2258         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2259         del_timer_sync(&sdata->u.mgd.timer);
2260         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2261
2262         sdata->vif.bss_conf.dtim_period = 0;
2263         sdata->vif.bss_conf.beacon_rate = NULL;
2264
2265         ifmgd->have_beacon = false;
2266
2267         ifmgd->flags = 0;
2268         mutex_lock(&local->mtx);
2269         ieee80211_vif_release_channel(sdata);
2270
2271         sdata->vif.csa_active = false;
2272         ifmgd->csa_waiting_bcn = false;
2273         ifmgd->csa_ignored_same_chan = false;
2274         if (sdata->csa_block_tx) {
2275                 ieee80211_wake_vif_queues(local, sdata,
2276                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2277                 sdata->csa_block_tx = false;
2278         }
2279         mutex_unlock(&local->mtx);
2280
2281         /* existing TX TSPEC sessions no longer exist */
2282         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2283         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2284
2285         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2286 }
2287
2288 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2289                              struct ieee80211_hdr *hdr)
2290 {
2291         /*
2292          * We can postpone the mgd.timer whenever receiving unicast frames
2293          * from AP because we know that the connection is working both ways
2294          * at that time. But multicast frames (and hence also beacons) must
2295          * be ignored here, because we need to trigger the timer during
2296          * data idle periods for sending the periodic probe request to the
2297          * AP we're connected to.
2298          */
2299         if (is_multicast_ether_addr(hdr->addr1))
2300                 return;
2301
2302         ieee80211_sta_reset_conn_monitor(sdata);
2303 }
2304
2305 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2306 {
2307         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2308         struct ieee80211_local *local = sdata->local;
2309
2310         mutex_lock(&local->mtx);
2311         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2312                 goto out;
2313
2314         __ieee80211_stop_poll(sdata);
2315
2316         mutex_lock(&local->iflist_mtx);
2317         ieee80211_recalc_ps(local);
2318         mutex_unlock(&local->iflist_mtx);
2319
2320         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2321                 goto out;
2322
2323         /*
2324          * We've received a probe response, but are not sure whether
2325          * we have or will be receiving any beacons or data, so let's
2326          * schedule the timers again, just in case.
2327          */
2328         ieee80211_sta_reset_beacon_monitor(sdata);
2329
2330         mod_timer(&ifmgd->conn_mon_timer,
2331                   round_jiffies_up(jiffies +
2332                                    IEEE80211_CONNECTION_IDLE_TIME));
2333 out:
2334         mutex_unlock(&local->mtx);
2335 }
2336
2337 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2338                                            struct ieee80211_hdr *hdr,
2339                                            u16 tx_time)
2340 {
2341         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2342         u16 tid = ieee80211_get_tid(hdr);
2343         int ac = ieee80211_ac_from_tid(tid);
2344         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2345         unsigned long now = jiffies;
2346
2347         if (likely(!tx_tspec->admitted_time))
2348                 return;
2349
2350         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2351                 tx_tspec->consumed_tx_time = 0;
2352                 tx_tspec->time_slice_start = now;
2353
2354                 if (tx_tspec->downgraded) {
2355                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2356                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2357                 }
2358         }
2359
2360         if (tx_tspec->downgraded)
2361                 return;
2362
2363         tx_tspec->consumed_tx_time += tx_time;
2364
2365         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2366                 tx_tspec->downgraded = true;
2367                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2368                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2369         }
2370 }
2371
2372 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2373                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2374 {
2375         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2376
2377         if (!ieee80211_is_data(hdr->frame_control))
2378             return;
2379
2380         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2381             sdata->u.mgd.probe_send_count > 0) {
2382                 if (ack)
2383                         ieee80211_sta_reset_conn_monitor(sdata);
2384                 else
2385                         sdata->u.mgd.nullfunc_failed = true;
2386                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2387                 return;
2388         }
2389
2390         if (ack)
2391                 ieee80211_sta_reset_conn_monitor(sdata);
2392 }
2393
2394 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2395                                           const u8 *src, const u8 *dst,
2396                                           const u8 *ssid, size_t ssid_len,
2397                                           struct ieee80211_channel *channel)
2398 {
2399         struct sk_buff *skb;
2400
2401         skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2402                                         ssid, ssid_len, NULL, 0,
2403                                         IEEE80211_PROBE_FLAG_DIRECTED);
2404         if (skb)
2405                 ieee80211_tx_skb(sdata, skb);
2406 }
2407
2408 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2409 {
2410         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2411         const u8 *ssid;
2412         u8 *dst = ifmgd->associated->bssid;
2413         u8 unicast_limit = max(1, max_probe_tries - 3);
2414         struct sta_info *sta;
2415
2416         /*
2417          * Try sending broadcast probe requests for the last three
2418          * probe requests after the first ones failed since some
2419          * buggy APs only support broadcast probe requests.
2420          */
2421         if (ifmgd->probe_send_count >= unicast_limit)
2422                 dst = NULL;
2423
2424         /*
2425          * When the hardware reports an accurate Tx ACK status, it's
2426          * better to send a nullfunc frame instead of a probe request,
2427          * as it will kick us off the AP quickly if we aren't associated
2428          * anymore. The timeout will be reset if the frame is ACKed by
2429          * the AP.
2430          */
2431         ifmgd->probe_send_count++;
2432
2433         if (dst) {
2434                 mutex_lock(&sdata->local->sta_mtx);
2435                 sta = sta_info_get(sdata, dst);
2436                 if (!WARN_ON(!sta))
2437                         ieee80211_check_fast_rx(sta);
2438                 mutex_unlock(&sdata->local->sta_mtx);
2439         }
2440
2441         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2442                 ifmgd->nullfunc_failed = false;
2443                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2444         } else {
2445                 int ssid_len;
2446
2447                 rcu_read_lock();
2448                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2449                 if (WARN_ON_ONCE(ssid == NULL))
2450                         ssid_len = 0;
2451                 else
2452                         ssid_len = ssid[1];
2453
2454                 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2455                                               ssid + 2, ssid_len,
2456                                               ifmgd->associated->channel);
2457                 rcu_read_unlock();
2458         }
2459
2460         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2461         run_again(sdata, ifmgd->probe_timeout);
2462 }
2463
2464 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2465                                    bool beacon)
2466 {
2467         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2468         bool already = false;
2469
2470         if (!ieee80211_sdata_running(sdata))
2471                 return;
2472
2473         sdata_lock(sdata);
2474
2475         if (!ifmgd->associated)
2476                 goto out;
2477
2478         mutex_lock(&sdata->local->mtx);
2479
2480         if (sdata->local->tmp_channel || sdata->local->scanning) {
2481                 mutex_unlock(&sdata->local->mtx);
2482                 goto out;
2483         }
2484
2485         if (beacon) {
2486                 mlme_dbg_ratelimited(sdata,
2487                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2488                                      beacon_loss_count);
2489
2490                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2491         }
2492
2493         /*
2494          * The driver/our work has already reported this event or the
2495          * connection monitoring has kicked in and we have already sent
2496          * a probe request. Or maybe the AP died and the driver keeps
2497          * reporting until we disassociate...
2498          *
2499          * In either case we have to ignore the current call to this
2500          * function (except for setting the correct probe reason bit)
2501          * because otherwise we would reset the timer every time and
2502          * never check whether we received a probe response!
2503          */
2504         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2505                 already = true;
2506
2507         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2508
2509         mutex_unlock(&sdata->local->mtx);
2510
2511         if (already)
2512                 goto out;
2513
2514         mutex_lock(&sdata->local->iflist_mtx);
2515         ieee80211_recalc_ps(sdata->local);
2516         mutex_unlock(&sdata->local->iflist_mtx);
2517
2518         ifmgd->probe_send_count = 0;
2519         ieee80211_mgd_probe_ap_send(sdata);
2520  out:
2521         sdata_unlock(sdata);
2522 }
2523
2524 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2525                                           struct ieee80211_vif *vif)
2526 {
2527         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2528         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2529         struct cfg80211_bss *cbss;
2530         struct sk_buff *skb;
2531         const u8 *ssid;
2532         int ssid_len;
2533
2534         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2535                 return NULL;
2536
2537         sdata_assert_lock(sdata);
2538
2539         if (ifmgd->associated)
2540                 cbss = ifmgd->associated;
2541         else if (ifmgd->auth_data)
2542                 cbss = ifmgd->auth_data->bss;
2543         else if (ifmgd->assoc_data)
2544                 cbss = ifmgd->assoc_data->bss;
2545         else
2546                 return NULL;
2547
2548         rcu_read_lock();
2549         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2550         if (WARN_ON_ONCE(ssid == NULL))
2551                 ssid_len = 0;
2552         else
2553                 ssid_len = ssid[1];
2554
2555         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2556                                         (u32) -1, cbss->channel,
2557                                         ssid + 2, ssid_len,
2558                                         NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2559         rcu_read_unlock();
2560
2561         return skb;
2562 }
2563 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2564
2565 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2566                                         const u8 *buf, size_t len, bool tx,
2567                                         u16 reason)
2568 {
2569         struct ieee80211_event event = {
2570                 .type = MLME_EVENT,
2571                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2572                 .u.mlme.reason = reason,
2573         };
2574
2575         if (tx)
2576                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2577         else
2578                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2579
2580         drv_event_callback(sdata->local, sdata, &event);
2581 }
2582
2583 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2584 {
2585         struct ieee80211_local *local = sdata->local;
2586         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2587         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2588         bool tx;
2589
2590         sdata_lock(sdata);
2591         if (!ifmgd->associated) {
2592                 sdata_unlock(sdata);
2593                 return;
2594         }
2595
2596         tx = !sdata->csa_block_tx;
2597
2598         /* AP is probably out of range (or not reachable for another reason) so
2599          * remove the bss struct for that AP.
2600          */
2601         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2602
2603         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2604                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2605                                tx, frame_buf);
2606         mutex_lock(&local->mtx);
2607         sdata->vif.csa_active = false;
2608         ifmgd->csa_waiting_bcn = false;
2609         if (sdata->csa_block_tx) {
2610                 ieee80211_wake_vif_queues(local, sdata,
2611                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2612                 sdata->csa_block_tx = false;
2613         }
2614         mutex_unlock(&local->mtx);
2615
2616         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2617                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2618
2619         sdata_unlock(sdata);
2620 }
2621
2622 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2623 {
2624         struct ieee80211_sub_if_data *sdata =
2625                 container_of(work, struct ieee80211_sub_if_data,
2626                              u.mgd.beacon_connection_loss_work);
2627         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2628
2629         if (ifmgd->associated)
2630                 ifmgd->beacon_loss_count++;
2631
2632         if (ifmgd->connection_loss) {
2633                 sdata_info(sdata, "Connection to AP %pM lost\n",
2634                            ifmgd->bssid);
2635                 __ieee80211_disconnect(sdata);
2636         } else {
2637                 ieee80211_mgd_probe_ap(sdata, true);
2638         }
2639 }
2640
2641 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2642 {
2643         struct ieee80211_sub_if_data *sdata =
2644                 container_of(work, struct ieee80211_sub_if_data,
2645                              u.mgd.csa_connection_drop_work);
2646
2647         __ieee80211_disconnect(sdata);
2648 }
2649
2650 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2651 {
2652         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2653         struct ieee80211_hw *hw = &sdata->local->hw;
2654
2655         trace_api_beacon_loss(sdata);
2656
2657         sdata->u.mgd.connection_loss = false;
2658         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2659 }
2660 EXPORT_SYMBOL(ieee80211_beacon_loss);
2661
2662 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2663 {
2664         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2665         struct ieee80211_hw *hw = &sdata->local->hw;
2666
2667         trace_api_connection_loss(sdata);
2668
2669         sdata->u.mgd.connection_loss = true;
2670         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2671 }
2672 EXPORT_SYMBOL(ieee80211_connection_loss);
2673
2674
2675 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2676                                         bool assoc)
2677 {
2678         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2679
2680         sdata_assert_lock(sdata);
2681
2682         if (!assoc) {
2683                 /*
2684                  * we are not authenticated yet, the only timer that could be
2685                  * running is the timeout for the authentication response which
2686                  * which is not relevant anymore.
2687                  */
2688                 del_timer_sync(&sdata->u.mgd.timer);
2689                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2690
2691                 eth_zero_addr(sdata->u.mgd.bssid);
2692                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2693                 sdata->u.mgd.flags = 0;
2694                 mutex_lock(&sdata->local->mtx);
2695                 ieee80211_vif_release_channel(sdata);
2696                 mutex_unlock(&sdata->local->mtx);
2697         }
2698
2699         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2700         kfree(auth_data);
2701         sdata->u.mgd.auth_data = NULL;
2702 }
2703
2704 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2705                                          bool assoc, bool abandon)
2706 {
2707         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2708
2709         sdata_assert_lock(sdata);
2710
2711         if (!assoc) {
2712                 /*
2713                  * we are not associated yet, the only timer that could be
2714                  * running is the timeout for the association response which
2715                  * which is not relevant anymore.
2716                  */
2717                 del_timer_sync(&sdata->u.mgd.timer);
2718                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2719
2720                 eth_zero_addr(sdata->u.mgd.bssid);
2721                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2722                 sdata->u.mgd.flags = 0;
2723                 sdata->vif.mu_mimo_owner = false;
2724
2725                 mutex_lock(&sdata->local->mtx);
2726                 ieee80211_vif_release_channel(sdata);
2727                 mutex_unlock(&sdata->local->mtx);
2728
2729                 if (abandon)
2730                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2731         }
2732
2733         kfree(assoc_data);
2734         sdata->u.mgd.assoc_data = NULL;
2735 }
2736
2737 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2738                                      struct ieee80211_mgmt *mgmt, size_t len)
2739 {
2740         struct ieee80211_local *local = sdata->local;
2741         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2742         u8 *pos;
2743         struct ieee802_11_elems elems;
2744         u32 tx_flags = 0;
2745
2746         pos = mgmt->u.auth.variable;
2747         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2748         if (!elems.challenge)
2749                 return;
2750         auth_data->expected_transaction = 4;
2751         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2752         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2753                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2754                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2755         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2756                             elems.challenge - 2, elems.challenge_len + 2,
2757                             auth_data->bss->bssid, auth_data->bss->bssid,
2758                             auth_data->key, auth_data->key_len,
2759                             auth_data->key_idx, tx_flags);
2760 }
2761
2762 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2763                                    struct ieee80211_mgmt *mgmt, size_t len)
2764 {
2765         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2766         u8 bssid[ETH_ALEN];
2767         u16 auth_alg, auth_transaction, status_code;
2768         struct sta_info *sta;
2769         struct ieee80211_event event = {
2770                 .type = MLME_EVENT,
2771                 .u.mlme.data = AUTH_EVENT,
2772         };
2773
2774         sdata_assert_lock(sdata);
2775
2776         if (len < 24 + 6)
2777                 return;
2778
2779         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2780                 return;
2781
2782         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2783
2784         if (!ether_addr_equal(bssid, mgmt->bssid))
2785                 return;
2786
2787         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2788         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2789         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2790
2791         if (auth_alg != ifmgd->auth_data->algorithm ||
2792             auth_transaction != ifmgd->auth_data->expected_transaction) {
2793                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2794                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2795                            auth_transaction,
2796                            ifmgd->auth_data->expected_transaction);
2797                 return;
2798         }
2799
2800         if (status_code != WLAN_STATUS_SUCCESS) {
2801                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2802                            mgmt->sa, status_code);
2803                 ieee80211_destroy_auth_data(sdata, false);
2804                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2805                 event.u.mlme.status = MLME_DENIED;
2806                 event.u.mlme.reason = status_code;
2807                 drv_event_callback(sdata->local, sdata, &event);
2808                 return;
2809         }
2810
2811         switch (ifmgd->auth_data->algorithm) {
2812         case WLAN_AUTH_OPEN:
2813         case WLAN_AUTH_LEAP:
2814         case WLAN_AUTH_FT:
2815         case WLAN_AUTH_SAE:
2816         case WLAN_AUTH_FILS_SK:
2817         case WLAN_AUTH_FILS_SK_PFS:
2818         case WLAN_AUTH_FILS_PK:
2819                 break;
2820         case WLAN_AUTH_SHARED_KEY:
2821                 if (ifmgd->auth_data->expected_transaction != 4) {
2822                         ieee80211_auth_challenge(sdata, mgmt, len);
2823                         /* need another frame */
2824                         return;
2825                 }
2826                 break;
2827         default:
2828                 WARN_ONCE(1, "invalid auth alg %d",
2829                           ifmgd->auth_data->algorithm);
2830                 return;
2831         }
2832
2833         event.u.mlme.status = MLME_SUCCESS;
2834         drv_event_callback(sdata->local, sdata, &event);
2835         sdata_info(sdata, "authenticated\n");
2836         ifmgd->auth_data->done = true;
2837         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2838         ifmgd->auth_data->timeout_started = true;
2839         run_again(sdata, ifmgd->auth_data->timeout);
2840
2841         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2842             ifmgd->auth_data->expected_transaction != 2) {
2843                 /*
2844                  * Report auth frame to user space for processing since another
2845                  * round of Authentication frames is still needed.
2846                  */
2847                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2848                 return;
2849         }
2850
2851         /* move station state to auth */
2852         mutex_lock(&sdata->local->sta_mtx);
2853         sta = sta_info_get(sdata, bssid);
2854         if (!sta) {
2855                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2856                 goto out_err;
2857         }
2858         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2859                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2860                 goto out_err;
2861         }
2862         mutex_unlock(&sdata->local->sta_mtx);
2863
2864         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2865         return;
2866  out_err:
2867         mutex_unlock(&sdata->local->sta_mtx);
2868         /* ignore frame -- wait for timeout */
2869 }
2870
2871 #define case_WLAN(type) \
2872         case WLAN_REASON_##type: return #type
2873
2874 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2875 {
2876         switch (reason_code) {
2877         case_WLAN(UNSPECIFIED);
2878         case_WLAN(PREV_AUTH_NOT_VALID);
2879         case_WLAN(DEAUTH_LEAVING);
2880         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2881         case_WLAN(DISASSOC_AP_BUSY);
2882         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2883         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2884         case_WLAN(DISASSOC_STA_HAS_LEFT);
2885         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2886         case_WLAN(DISASSOC_BAD_POWER);
2887         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2888         case_WLAN(INVALID_IE);
2889         case_WLAN(MIC_FAILURE);
2890         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2891         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2892         case_WLAN(IE_DIFFERENT);
2893         case_WLAN(INVALID_GROUP_CIPHER);
2894         case_WLAN(INVALID_PAIRWISE_CIPHER);
2895         case_WLAN(INVALID_AKMP);
2896         case_WLAN(UNSUPP_RSN_VERSION);
2897         case_WLAN(INVALID_RSN_IE_CAP);
2898         case_WLAN(IEEE8021X_FAILED);
2899         case_WLAN(CIPHER_SUITE_REJECTED);
2900         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2901         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2902         case_WLAN(DISASSOC_LOW_ACK);
2903         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2904         case_WLAN(QSTA_LEAVE_QBSS);
2905         case_WLAN(QSTA_NOT_USE);
2906         case_WLAN(QSTA_REQUIRE_SETUP);
2907         case_WLAN(QSTA_TIMEOUT);
2908         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2909         case_WLAN(MESH_PEER_CANCELED);
2910         case_WLAN(MESH_MAX_PEERS);
2911         case_WLAN(MESH_CONFIG);
2912         case_WLAN(MESH_CLOSE);
2913         case_WLAN(MESH_MAX_RETRIES);
2914         case_WLAN(MESH_CONFIRM_TIMEOUT);
2915         case_WLAN(MESH_INVALID_GTK);
2916         case_WLAN(MESH_INCONSISTENT_PARAM);
2917         case_WLAN(MESH_INVALID_SECURITY);
2918         case_WLAN(MESH_PATH_ERROR);
2919         case_WLAN(MESH_PATH_NOFORWARD);
2920         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2921         case_WLAN(MAC_EXISTS_IN_MBSS);
2922         case_WLAN(MESH_CHAN_REGULATORY);
2923         case_WLAN(MESH_CHAN);
2924         default: return "<unknown>";
2925         }
2926 }
2927
2928 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2929                                      struct ieee80211_mgmt *mgmt, size_t len)
2930 {
2931         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2932         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2933
2934         sdata_assert_lock(sdata);
2935
2936         if (len < 24 + 2)
2937                 return;
2938
2939         if (ifmgd->associated &&
2940             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2941                 const u8 *bssid = ifmgd->associated->bssid;
2942
2943                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2944                            bssid, reason_code,
2945                            ieee80211_get_reason_code_string(reason_code));
2946
2947                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2948
2949                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2950                                             reason_code);
2951                 return;
2952         }
2953
2954         if (ifmgd->assoc_data &&
2955             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2956                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2957
2958                 sdata_info(sdata,
2959                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2960                            bssid, reason_code,
2961                            ieee80211_get_reason_code_string(reason_code));
2962
2963                 ieee80211_destroy_assoc_data(sdata, false, true);
2964
2965                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2966                 return;
2967         }
2968 }
2969
2970
2971 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2972                                        struct ieee80211_mgmt *mgmt, size_t len)
2973 {
2974         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2975         u16 reason_code;
2976
2977         sdata_assert_lock(sdata);
2978
2979         if (len < 24 + 2)
2980                 return;
2981
2982         if (!ifmgd->associated ||
2983             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2984                 return;
2985
2986         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2987
2988         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2989                    mgmt->sa, reason_code,
2990                    ieee80211_get_reason_code_string(reason_code));
2991
2992         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2993
2994         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2995 }
2996
2997 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2998                                 u8 *supp_rates, unsigned int supp_rates_len,
2999                                 u32 *rates, u32 *basic_rates,
3000                                 bool *have_higher_than_11mbit,
3001                                 int *min_rate, int *min_rate_index,
3002                                 int shift)
3003 {
3004         int i, j;
3005
3006         for (i = 0; i < supp_rates_len; i++) {
3007                 int rate = supp_rates[i] & 0x7f;
3008                 bool is_basic = !!(supp_rates[i] & 0x80);
3009
3010                 if ((rate * 5 * (1 << shift)) > 110)
3011                         *have_higher_than_11mbit = true;
3012
3013                 /*
3014                  * Skip HT and VHT BSS membership selectors since they're not
3015                  * rates.
3016                  *
3017                  * Note: Even though the membership selector and the basic
3018                  *       rate flag share the same bit, they are not exactly
3019                  *       the same.
3020                  */
3021                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3022                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3023                         continue;
3024
3025                 for (j = 0; j < sband->n_bitrates; j++) {
3026                         struct ieee80211_rate *br;
3027                         int brate;
3028
3029                         br = &sband->bitrates[j];
3030
3031                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3032                         if (brate == rate) {
3033                                 *rates |= BIT(j);
3034                                 if (is_basic)
3035                                         *basic_rates |= BIT(j);
3036                                 if ((rate * 5) < *min_rate) {
3037                                         *min_rate = rate * 5;
3038                                         *min_rate_index = j;
3039                                 }
3040                                 break;
3041                         }
3042                 }
3043         }
3044 }
3045
3046 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3047                                     struct cfg80211_bss *cbss,
3048                                     struct ieee80211_mgmt *mgmt, size_t len)
3049 {
3050         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3051         struct ieee80211_local *local = sdata->local;
3052         struct ieee80211_supported_band *sband;
3053         struct sta_info *sta;
3054         u8 *pos;
3055         u16 capab_info, aid;
3056         struct ieee802_11_elems elems;
3057         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3058         const struct cfg80211_bss_ies *bss_ies = NULL;
3059         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3060         u32 changed = 0;
3061         int err;
3062         bool ret;
3063
3064         /* AssocResp and ReassocResp have identical structure */
3065
3066         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3067         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3068
3069         /*
3070          * The 5 MSB of the AID field are reserved
3071          * (802.11-2016 9.4.1.8 AID field)
3072          */
3073         aid &= 0x7ff;
3074
3075         ifmgd->broken_ap = false;
3076
3077         if (aid == 0 || aid > IEEE80211_MAX_AID) {
3078                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3079                            aid);
3080                 aid = 0;
3081                 ifmgd->broken_ap = true;
3082         }
3083
3084         pos = mgmt->u.assoc_resp.variable;
3085         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3086
3087         if (!elems.supp_rates) {
3088                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3089                 return false;
3090         }
3091
3092         ifmgd->aid = aid;
3093         ifmgd->tdls_chan_switch_prohibited =
3094                 elems.ext_capab && elems.ext_capab_len >= 5 &&
3095                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3096
3097         /*
3098          * Some APs are erroneously not including some information in their
3099          * (re)association response frames. Try to recover by using the data
3100          * from the beacon or probe response. This seems to afflict mobile
3101          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3102          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3103          */
3104         if ((assoc_data->wmm && !elems.wmm_param) ||
3105             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3106              (!elems.ht_cap_elem || !elems.ht_operation)) ||
3107             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3108              (!elems.vht_cap_elem || !elems.vht_operation))) {
3109                 const struct cfg80211_bss_ies *ies;
3110                 struct ieee802_11_elems bss_elems;
3111
3112                 rcu_read_lock();
3113                 ies = rcu_dereference(cbss->ies);
3114                 if (ies)
3115                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3116                                           GFP_ATOMIC);
3117                 rcu_read_unlock();
3118                 if (!bss_ies)
3119                         return false;
3120
3121                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3122                                        false, &bss_elems);
3123                 if (assoc_data->wmm &&
3124                     !elems.wmm_param && bss_elems.wmm_param) {
3125                         elems.wmm_param = bss_elems.wmm_param;
3126                         sdata_info(sdata,
3127                                    "AP bug: WMM param missing from AssocResp\n");
3128                 }
3129
3130                 /*
3131                  * Also check if we requested HT/VHT, otherwise the AP doesn't
3132                  * have to include the IEs in the (re)association response.
3133                  */
3134                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
3135                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3136                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
3137                         sdata_info(sdata,
3138                                    "AP bug: HT capability missing from AssocResp\n");
3139                 }
3140                 if (!elems.ht_operation && bss_elems.ht_operation &&
3141                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3142                         elems.ht_operation = bss_elems.ht_operation;
3143                         sdata_info(sdata,
3144                                    "AP bug: HT operation missing from AssocResp\n");
3145                 }
3146                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3147                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3148                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
3149                         sdata_info(sdata,
3150                                    "AP bug: VHT capa missing from AssocResp\n");
3151                 }
3152                 if (!elems.vht_operation && bss_elems.vht_operation &&
3153                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3154                         elems.vht_operation = bss_elems.vht_operation;
3155                         sdata_info(sdata,
3156                                    "AP bug: VHT operation missing from AssocResp\n");
3157                 }
3158         }
3159
3160         /*
3161          * We previously checked these in the beacon/probe response, so
3162          * they should be present here. This is just a safety net.
3163          */
3164         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3165             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3166                 sdata_info(sdata,
3167                            "HT AP is missing WMM params or HT capability/operation\n");
3168                 ret = false;
3169                 goto out;
3170         }
3171
3172         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3173             (!elems.vht_cap_elem || !elems.vht_operation)) {
3174                 sdata_info(sdata,
3175                            "VHT AP is missing VHT capability/operation\n");
3176                 ret = false;
3177                 goto out;
3178         }
3179
3180         mutex_lock(&sdata->local->sta_mtx);
3181         /*
3182          * station info was already allocated and inserted before
3183          * the association and should be available to us
3184          */
3185         sta = sta_info_get(sdata, cbss->bssid);
3186         if (WARN_ON(!sta)) {
3187                 mutex_unlock(&sdata->local->sta_mtx);
3188                 ret = false;
3189                 goto out;
3190         }
3191
3192         sband = ieee80211_get_sband(sdata);
3193         if (!sband) {
3194                 mutex_unlock(&sdata->local->sta_mtx);
3195                 ret = false;
3196                 goto out;
3197         }
3198
3199         /*
3200          * If AP doesn't support HT, or it doesn't have HE mandatory IEs, mark
3201          * HE as disabled. If on the 5GHz band, make sure it supports VHT.
3202          */
3203         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
3204             (sband->band == NL80211_BAND_5GHZ &&
3205              ifmgd->flags & IEEE80211_STA_DISABLE_VHT) ||
3206             (!elems.he_cap && !elems.he_operation))
3207                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
3208
3209         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3210             (!elems.he_cap || !elems.he_operation)) {
3211                 mutex_unlock(&sdata->local->sta_mtx);
3212                 sdata_info(sdata,
3213                            "HE AP is missing HE capability/operation\n");
3214                 ret = false;
3215                 goto out;
3216         }
3217
3218         /* Set up internal HT/VHT capabilities */
3219         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3220                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3221                                                   elems.ht_cap_elem, sta);
3222
3223         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3224                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3225                                                     elems.vht_cap_elem, sta);
3226
3227         if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3228             elems.he_cap) {
3229                 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3230                                                   elems.he_cap,
3231                                                   elems.he_cap_len,
3232                                                   sta);
3233
3234                 bss_conf->he_support = sta->sta.he_cap.has_he;
3235         } else {
3236                 bss_conf->he_support = false;
3237         }
3238
3239         if (bss_conf->he_support) {
3240                 u32 he_oper_params =
3241                         le32_to_cpu(elems.he_operation->he_oper_params);
3242
3243                 bss_conf->bss_color = he_oper_params &
3244                                       IEEE80211_HE_OPERATION_BSS_COLOR_MASK;
3245                 bss_conf->htc_trig_based_pkt_ext =
3246                         (he_oper_params &
3247                          IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK) <<
3248                         IEEE80211_HE_OPERATION_DFLT_PE_DURATION_OFFSET;
3249                 bss_conf->frame_time_rts_th =
3250                         (he_oper_params &
3251                          IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK) <<
3252                         IEEE80211_HE_OPERATION_RTS_THRESHOLD_OFFSET;
3253
3254                 bss_conf->multi_sta_back_32bit =
3255                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3256                         IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3257
3258                 bss_conf->ack_enabled =
3259                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3260                         IEEE80211_HE_MAC_CAP2_ACK_EN;
3261
3262                 bss_conf->uora_exists = !!elems.uora_element;
3263                 if (elems.uora_element)
3264                         bss_conf->uora_ocw_range = elems.uora_element[0];
3265
3266                 /* TODO: OPEN: what happens if BSS color disable is set? */
3267         }
3268
3269         /*
3270          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3271          * in their association response, so ignore that data for our own
3272          * configuration. If it changed since the last beacon, we'll get the
3273          * next beacon and update then.
3274          */
3275
3276         /*
3277          * If an operating mode notification IE is present, override the
3278          * NSS calculation (that would be done in rate_control_rate_init())
3279          * and use the # of streams from that element.
3280          */
3281         if (elems.opmode_notif &&
3282             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3283                 u8 nss;
3284
3285                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3286                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3287                 nss += 1;
3288                 sta->sta.rx_nss = nss;
3289         }
3290
3291         rate_control_rate_init(sta);
3292
3293         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3294                 set_sta_flag(sta, WLAN_STA_MFP);
3295                 sta->sta.mfp = true;
3296         } else {
3297                 sta->sta.mfp = false;
3298         }
3299
3300         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3301
3302         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3303         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3304                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3305         if (err) {
3306                 sdata_info(sdata,
3307                            "failed to move station %pM to desired state\n",
3308                            sta->sta.addr);
3309                 WARN_ON(__sta_info_destroy(sta));
3310                 mutex_unlock(&sdata->local->sta_mtx);
3311                 ret = false;
3312                 goto out;
3313         }
3314
3315         mutex_unlock(&sdata->local->sta_mtx);
3316
3317         /*
3318          * Always handle WMM once after association regardless
3319          * of the first value the AP uses. Setting -1 here has
3320          * that effect because the AP values is an unsigned
3321          * 4-bit value.
3322          */
3323         ifmgd->wmm_last_param_set = -1;
3324
3325         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3326                 ieee80211_set_wmm_default(sdata, false, false);
3327         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3328                                              elems.wmm_param_len,
3329                                              elems.mu_edca_param_set)) {
3330                 /* still enable QoS since we might have HT/VHT */
3331                 ieee80211_set_wmm_default(sdata, false, true);
3332                 /* set the disable-WMM flag in this case to disable
3333                  * tracking WMM parameter changes in the beacon if
3334                  * the parameters weren't actually valid. Doing so
3335                  * avoids changing parameters very strangely when
3336                  * the AP is going back and forth between valid and
3337                  * invalid parameters.
3338                  */
3339                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3340         }
3341         changed |= BSS_CHANGED_QOS;
3342
3343         if (elems.max_idle_period_ie) {
3344                 bss_conf->max_idle_period =
3345                         le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3346                 bss_conf->protected_keep_alive =
3347                         !!(elems.max_idle_period_ie->idle_options &
3348                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3349                 changed |= BSS_CHANGED_KEEP_ALIVE;
3350         } else {
3351                 bss_conf->max_idle_period = 0;
3352                 bss_conf->protected_keep_alive = false;
3353         }
3354
3355         /* set AID and assoc capability,
3356          * ieee80211_set_associated() will tell the driver */
3357         bss_conf->aid = aid;
3358         bss_conf->assoc_capability = capab_info;
3359         ieee80211_set_associated(sdata, cbss, changed);
3360
3361         /*
3362          * If we're using 4-addr mode, let the AP know that we're
3363          * doing so, so that it can create the STA VLAN on its side
3364          */
3365         if (ifmgd->use_4addr)
3366                 ieee80211_send_4addr_nullfunc(local, sdata);
3367
3368         /*
3369          * Start timer to probe the connection to the AP now.
3370          * Also start the timer that will detect beacon loss.
3371          */
3372         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3373         ieee80211_sta_reset_beacon_monitor(sdata);
3374
3375         ret = true;
3376  out:
3377         kfree(bss_ies);
3378         return ret;
3379 }
3380
3381 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3382                                          struct ieee80211_mgmt *mgmt,
3383                                          size_t len)
3384 {
3385         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3386         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3387         u16 capab_info, status_code, aid;
3388         struct ieee802_11_elems elems;
3389         int ac, uapsd_queues = -1;
3390         u8 *pos;
3391         bool reassoc;
3392         struct cfg80211_bss *bss;
3393         struct ieee80211_event event = {
3394                 .type = MLME_EVENT,
3395                 .u.mlme.data = ASSOC_EVENT,
3396         };
3397
3398         sdata_assert_lock(sdata);
3399
3400         if (!assoc_data)
3401                 return;
3402         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3403                 return;
3404
3405         /*
3406          * AssocResp and ReassocResp have identical structure, so process both
3407          * of them in this function.
3408          */
3409
3410         if (len < 24 + 6)
3411                 return;
3412
3413         reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3414         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3415         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3416         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3417
3418         sdata_info(sdata,
3419                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3420                    reassoc ? "Rea" : "A", mgmt->sa,
3421                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3422
3423         if (assoc_data->fils_kek_len &&
3424             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3425                 return;
3426
3427         pos = mgmt->u.assoc_resp.variable;
3428         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3429
3430         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3431             elems.timeout_int &&
3432             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3433                 u32 tu, ms;
3434                 tu = le32_to_cpu(elems.timeout_int->value);
3435                 ms = tu * 1024 / 1000;
3436                 sdata_info(sdata,
3437                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3438                            mgmt->sa, tu, ms);
3439                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3440                 assoc_data->timeout_started = true;
3441                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3442                         run_again(sdata, assoc_data->timeout);
3443                 return;
3444         }
3445
3446         bss = assoc_data->bss;
3447
3448         if (status_code != WLAN_STATUS_SUCCESS) {
3449                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3450                            mgmt->sa, status_code);
3451                 ieee80211_destroy_assoc_data(sdata, false, false);
3452                 event.u.mlme.status = MLME_DENIED;
3453                 event.u.mlme.reason = status_code;
3454                 drv_event_callback(sdata->local, sdata, &event);
3455         } else {
3456                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3457                         /* oops -- internal error -- send timeout for now */
3458                         ieee80211_destroy_assoc_data(sdata, false, false);
3459                         cfg80211_assoc_timeout(sdata->dev, bss);
3460                         return;
3461                 }
3462                 event.u.mlme.status = MLME_SUCCESS;
3463                 drv_event_callback(sdata->local, sdata, &event);
3464                 sdata_info(sdata, "associated\n");
3465
3466                 /*
3467                  * destroy assoc_data afterwards, as otherwise an idle
3468                  * recalc after assoc_data is NULL but before associated
3469                  * is set can cause the interface to go idle
3470                  */
3471                 ieee80211_destroy_assoc_data(sdata, true, false);
3472
3473                 /* get uapsd queues configuration */
3474                 uapsd_queues = 0;
3475                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3476                         if (sdata->tx_conf[ac].uapsd)
3477                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3478         }
3479
3480         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3481 }
3482
3483 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3484                                   struct ieee80211_mgmt *mgmt, size_t len,
3485                                   struct ieee80211_rx_status *rx_status,
3486                                   struct ieee802_11_elems *elems)
3487 {
3488         struct ieee80211_local *local = sdata->local;
3489         struct ieee80211_bss *bss;
3490         struct ieee80211_channel *channel;
3491
3492         sdata_assert_lock(sdata);
3493
3494         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3495         if (!channel)
3496                 return;
3497
3498         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3499                                         channel);
3500         if (bss) {
3501                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3502                 ieee80211_rx_bss_put(local, bss);
3503         }
3504 }
3505
3506
3507 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3508                                          struct sk_buff *skb)
3509 {
3510         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3511         struct ieee80211_if_managed *ifmgd;
3512         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3513         size_t baselen, len = skb->len;
3514         struct ieee802_11_elems elems;
3515
3516         ifmgd = &sdata->u.mgd;
3517
3518         sdata_assert_lock(sdata);
3519
3520         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3521                 return; /* ignore ProbeResp to foreign address */
3522
3523         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3524         if (baselen > len)
3525                 return;
3526
3527         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3528                                false, &elems);
3529
3530         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3531
3532         if (ifmgd->associated &&
3533             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3534                 ieee80211_reset_ap_probe(sdata);
3535 }
3536
3537 /*
3538  * This is the canonical list of information elements we care about,
3539  * the filter code also gives us all changes to the Microsoft OUI
3540  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3541  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3542  * changes to requested client power.
3543  *
3544  * We implement beacon filtering in software since that means we can
3545  * avoid processing the frame here and in cfg80211, and userspace
3546  * will not be able to tell whether the hardware supports it or not.
3547  *
3548  * XXX: This list needs to be dynamic -- userspace needs to be able to
3549  *      add items it requires. It also needs to be able to tell us to
3550  *      look out for other vendor IEs.
3551  */
3552 static const u64 care_about_ies =
3553         (1ULL << WLAN_EID_COUNTRY) |
3554         (1ULL << WLAN_EID_ERP_INFO) |
3555         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3556         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3557         (1ULL << WLAN_EID_HT_CAPABILITY) |
3558         (1ULL << WLAN_EID_HT_OPERATION) |
3559         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3560
3561 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3562                                         struct ieee80211_if_managed *ifmgd,
3563                                         struct ieee80211_bss_conf *bss_conf,
3564                                         struct ieee80211_local *local,
3565                                         struct ieee80211_rx_status *rx_status)
3566 {
3567         /* Track average RSSI from the Beacon frames of the current AP */
3568
3569         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3570                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3571                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3572                 ifmgd->last_cqm_event_signal = 0;
3573                 ifmgd->count_beacon_signal = 1;
3574                 ifmgd->last_ave_beacon_signal = 0;
3575         } else {
3576                 ifmgd->count_beacon_signal++;
3577         }
3578
3579         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3580
3581         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3582             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3583                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3584                 int last_sig = ifmgd->last_ave_beacon_signal;
3585                 struct ieee80211_event event = {
3586                         .type = RSSI_EVENT,
3587                 };
3588
3589                 /*
3590                  * if signal crosses either of the boundaries, invoke callback
3591                  * with appropriate parameters
3592                  */
3593                 if (sig > ifmgd->rssi_max_thold &&
3594                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3595                         ifmgd->last_ave_beacon_signal = sig;
3596                         event.u.rssi.data = RSSI_EVENT_HIGH;
3597                         drv_event_callback(local, sdata, &event);
3598                 } else if (sig < ifmgd->rssi_min_thold &&
3599                            (last_sig >= ifmgd->rssi_max_thold ||
3600                            last_sig == 0)) {
3601                         ifmgd->last_ave_beacon_signal = sig;
3602                         event.u.rssi.data = RSSI_EVENT_LOW;
3603                         drv_event_callback(local, sdata, &event);
3604                 }
3605         }
3606
3607         if (bss_conf->cqm_rssi_thold &&
3608             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3609             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3610                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3611                 int last_event = ifmgd->last_cqm_event_signal;
3612                 int thold = bss_conf->cqm_rssi_thold;
3613                 int hyst = bss_conf->cqm_rssi_hyst;
3614
3615                 if (sig < thold &&
3616                     (last_event == 0 || sig < last_event - hyst)) {
3617                         ifmgd->last_cqm_event_signal = sig;
3618                         ieee80211_cqm_rssi_notify(
3619                                 &sdata->vif,
3620                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3621                                 sig, GFP_KERNEL);
3622                 } else if (sig > thold &&
3623                            (last_event == 0 || sig > last_event + hyst)) {
3624                         ifmgd->last_cqm_event_signal = sig;
3625                         ieee80211_cqm_rssi_notify(
3626                                 &sdata->vif,
3627                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3628                                 sig, GFP_KERNEL);
3629                 }
3630         }
3631
3632         if (bss_conf->cqm_rssi_low &&
3633             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3634                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3635                 int last_event = ifmgd->last_cqm_event_signal;
3636                 int low = bss_conf->cqm_rssi_low;
3637                 int high = bss_conf->cqm_rssi_high;
3638
3639                 if (sig < low &&
3640                     (last_event == 0 || last_event >= low)) {
3641                         ifmgd->last_cqm_event_signal = sig;
3642                         ieee80211_cqm_rssi_notify(
3643                                 &sdata->vif,
3644                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3645                                 sig, GFP_KERNEL);
3646                 } else if (sig > high &&
3647                            (last_event == 0 || last_event <= high)) {
3648                         ifmgd->last_cqm_event_signal = sig;
3649                         ieee80211_cqm_rssi_notify(
3650                                 &sdata->vif,
3651                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3652                                 sig, GFP_KERNEL);
3653                 }
3654         }
3655 }
3656
3657 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3658                                      struct ieee80211_mgmt *mgmt, size_t len,
3659                                      struct ieee80211_rx_status *rx_status)
3660 {
3661         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3662         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3663         size_t baselen;
3664         struct ieee802_11_elems elems;
3665         struct ieee80211_local *local = sdata->local;
3666         struct ieee80211_chanctx_conf *chanctx_conf;
3667         struct ieee80211_channel *chan;
3668         struct sta_info *sta;
3669         u32 changed = 0;
3670         bool erp_valid;
3671         u8 erp_value = 0;
3672         u32 ncrc;
3673         u8 *bssid;
3674         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3675
3676         sdata_assert_lock(sdata);
3677
3678         /* Process beacon from the current BSS */
3679         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3680         if (baselen > len)
3681                 return;
3682
3683         rcu_read_lock();
3684         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3685         if (!chanctx_conf) {
3686                 rcu_read_unlock();
3687                 return;
3688         }
3689
3690         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3691                 rcu_read_unlock();
3692                 return;
3693         }
3694         chan = chanctx_conf->def.chan;
3695         rcu_read_unlock();
3696
3697         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3698             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3699                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3700                                        len - baselen, false, &elems);
3701
3702                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3703                 if (elems.tim && !elems.parse_error) {
3704                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3705                         ifmgd->dtim_period = tim_ie->dtim_period;
3706                 }
3707                 ifmgd->have_beacon = true;
3708                 ifmgd->assoc_data->need_beacon = false;
3709                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3710                         sdata->vif.bss_conf.sync_tsf =
3711                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3712                         sdata->vif.bss_conf.sync_device_ts =
3713                                 rx_status->device_timestamp;
3714                         if (elems.tim)
3715                                 sdata->vif.bss_conf.sync_dtim_count =
3716                                         elems.tim->dtim_count;
3717                         else
3718                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3719                 }
3720                 /* continue assoc process */
3721                 ifmgd->assoc_data->timeout = jiffies;
3722                 ifmgd->assoc_data->timeout_started = true;
3723                 run_again(sdata, ifmgd->assoc_data->timeout);
3724                 return;
3725         }
3726
3727         if (!ifmgd->associated ||
3728             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3729                 return;
3730         bssid = ifmgd->associated->bssid;
3731
3732         if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3733                 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3734                                             local, rx_status);
3735
3736         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3737                 mlme_dbg_ratelimited(sdata,
3738                                      "cancelling AP probe due to a received beacon\n");
3739                 ieee80211_reset_ap_probe(sdata);
3740         }
3741
3742         /*
3743          * Push the beacon loss detection into the future since
3744          * we are processing a beacon from the AP just now.
3745          */
3746         ieee80211_sta_reset_beacon_monitor(sdata);
3747
3748         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3749         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3750                                           len - baselen, false, &elems,
3751                                           care_about_ies, ncrc);
3752
3753         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3754             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3755                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3756                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3757                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3758                                 ieee80211_hw_config(local,
3759                                                     IEEE80211_CONF_CHANGE_PS);
3760                         }
3761                         ieee80211_send_nullfunc(local, sdata, false);
3762                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3763                         local->pspolling = true;
3764
3765                         /*
3766                          * Here is assumed that the driver will be
3767                          * able to send ps-poll frame and receive a
3768                          * response even though power save mode is
3769                          * enabled, but some drivers might require
3770                          * to disable power save here. This needs
3771                          * to be investigated.
3772                          */
3773                         ieee80211_send_pspoll(local, sdata);
3774                 }
3775         }
3776
3777         if (sdata->vif.p2p ||
3778             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3779                 struct ieee80211_p2p_noa_attr noa = {};
3780                 int ret;
3781
3782                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3783                                             len - baselen,
3784                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3785                                             (u8 *) &noa, sizeof(noa));
3786                 if (ret >= 2) {
3787                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3788                                 /* valid noa_attr and index changed */
3789                                 sdata->u.mgd.p2p_noa_index = noa.index;
3790                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3791                                 changed |= BSS_CHANGED_P2P_PS;
3792                                 /*
3793                                  * make sure we update all information, the CRC
3794                                  * mechanism doesn't look at P2P attributes.
3795                                  */
3796                                 ifmgd->beacon_crc_valid = false;
3797                         }
3798                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3799                         /* noa_attr not found and we had valid noa_attr before */
3800                         sdata->u.mgd.p2p_noa_index = -1;
3801                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3802                         changed |= BSS_CHANGED_P2P_PS;
3803                         ifmgd->beacon_crc_valid = false;
3804                 }
3805         }
3806
3807         if (ifmgd->csa_waiting_bcn)
3808                 ieee80211_chswitch_post_beacon(sdata);
3809
3810         /*
3811          * Update beacon timing and dtim count on every beacon appearance. This
3812          * will allow the driver to use the most updated values. Do it before
3813          * comparing this one with last received beacon.
3814          * IMPORTANT: These parameters would possibly be out of sync by the time
3815          * the driver will use them. The synchronized view is currently
3816          * guaranteed only in certain callbacks.
3817          */
3818         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3819                 sdata->vif.bss_conf.sync_tsf =
3820                         le64_to_cpu(mgmt->u.beacon.timestamp);
3821                 sdata->vif.bss_conf.sync_device_ts =
3822                         rx_status->device_timestamp;
3823                 if (elems.tim)
3824                         sdata->vif.bss_conf.sync_dtim_count =
3825                                 elems.tim->dtim_count;
3826                 else
3827                         sdata->vif.bss_conf.sync_dtim_count = 0;
3828         }
3829
3830         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3831                 return;
3832         ifmgd->beacon_crc = ncrc;
3833         ifmgd->beacon_crc_valid = true;
3834
3835         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3836
3837         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3838                                          rx_status->device_timestamp,
3839                                          &elems, true);
3840
3841         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3842             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3843                                      elems.wmm_param_len,
3844                                      elems.mu_edca_param_set))
3845                 changed |= BSS_CHANGED_QOS;
3846
3847         /*
3848          * If we haven't had a beacon before, tell the driver about the
3849          * DTIM period (and beacon timing if desired) now.
3850          */
3851         if (!ifmgd->have_beacon) {
3852                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3853                 if (elems.tim)
3854                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3855                 else
3856                         bss_conf->dtim_period = 1;
3857
3858                 changed |= BSS_CHANGED_BEACON_INFO;
3859                 ifmgd->have_beacon = true;
3860
3861                 mutex_lock(&local->iflist_mtx);
3862                 ieee80211_recalc_ps(local);
3863                 mutex_unlock(&local->iflist_mtx);
3864
3865                 ieee80211_recalc_ps_vif(sdata);
3866         }
3867
3868         if (elems.erp_info) {
3869                 erp_valid = true;
3870                 erp_value = elems.erp_info[0];
3871         } else {
3872                 erp_valid = false;
3873         }
3874         changed |= ieee80211_handle_bss_capability(sdata,
3875                         le16_to_cpu(mgmt->u.beacon.capab_info),
3876                         erp_valid, erp_value);
3877
3878         mutex_lock(&local->sta_mtx);
3879         sta = sta_info_get(sdata, bssid);
3880
3881         if (ieee80211_config_bw(sdata, sta,
3882                                 elems.ht_cap_elem, elems.ht_operation,
3883                                 elems.vht_operation, elems.he_operation,
3884                                 bssid, &changed)) {
3885                 mutex_unlock(&local->sta_mtx);
3886                 sdata_info(sdata,
3887                            "failed to follow AP %pM bandwidth change, disconnect\n",
3888                            bssid);
3889                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3890                                        WLAN_REASON_DEAUTH_LEAVING,
3891                                        true, deauth_buf);
3892                 ieee80211_report_disconnect(sdata, deauth_buf,
3893                                             sizeof(deauth_buf), true,
3894                                             WLAN_REASON_DEAUTH_LEAVING);
3895                 return;
3896         }
3897
3898         if (sta && elems.opmode_notif)
3899                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3900                                             rx_status->band);
3901         mutex_unlock(&local->sta_mtx);
3902
3903         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3904                                                elems.country_elem,
3905                                                elems.country_elem_len,
3906                                                elems.pwr_constr_elem,
3907                                                elems.cisco_dtpc_elem);
3908
3909         ieee80211_bss_info_change_notify(sdata, changed);
3910 }
3911
3912 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3913                                   struct sk_buff *skb)
3914 {
3915         struct ieee80211_rx_status *rx_status;
3916         struct ieee80211_mgmt *mgmt;
3917         u16 fc;
3918         struct ieee802_11_elems elems;
3919         int ies_len;
3920
3921         rx_status = (struct ieee80211_rx_status *) skb->cb;
3922         mgmt = (struct ieee80211_mgmt *) skb->data;
3923         fc = le16_to_cpu(mgmt->frame_control);
3924
3925         sdata_lock(sdata);
3926
3927         switch (fc & IEEE80211_FCTL_STYPE) {
3928         case IEEE80211_STYPE_BEACON:
3929                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3930                 break;
3931         case IEEE80211_STYPE_PROBE_RESP:
3932                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3933                 break;
3934         case IEEE80211_STYPE_AUTH:
3935                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3936                 break;
3937         case IEEE80211_STYPE_DEAUTH:
3938                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3939                 break;
3940         case IEEE80211_STYPE_DISASSOC:
3941                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3942                 break;
3943         case IEEE80211_STYPE_ASSOC_RESP:
3944         case IEEE80211_STYPE_REASSOC_RESP:
3945                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3946                 break;
3947         case IEEE80211_STYPE_ACTION:
3948                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3949                         ies_len = skb->len -
3950                                   offsetof(struct ieee80211_mgmt,
3951                                            u.action.u.chan_switch.variable);
3952
3953                         if (ies_len < 0)
3954                                 break;
3955
3956                         ieee802_11_parse_elems(
3957                                 mgmt->u.action.u.chan_switch.variable,
3958                                 ies_len, true, &elems);
3959
3960                         if (elems.parse_error)
3961                                 break;
3962
3963                         ieee80211_sta_process_chanswitch(sdata,
3964                                                  rx_status->mactime,
3965                                                  rx_status->device_timestamp,
3966                                                  &elems, false);
3967                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3968                         ies_len = skb->len -
3969                                   offsetof(struct ieee80211_mgmt,
3970                                            u.action.u.ext_chan_switch.variable);
3971
3972                         if (ies_len < 0)
3973                                 break;
3974
3975                         ieee802_11_parse_elems(
3976                                 mgmt->u.action.u.ext_chan_switch.variable,
3977                                 ies_len, true, &elems);
3978
3979                         if (elems.parse_error)
3980                                 break;
3981
3982                         /* for the handling code pretend this was also an IE */
3983                         elems.ext_chansw_ie =
3984                                 &mgmt->u.action.u.ext_chan_switch.data;
3985
3986                         ieee80211_sta_process_chanswitch(sdata,
3987                                                  rx_status->mactime,
3988                                                  rx_status->device_timestamp,
3989                                                  &elems, false);
3990                 }
3991                 break;
3992         }
3993         sdata_unlock(sdata);
3994 }
3995
3996 static void ieee80211_sta_timer(struct timer_list *t)
3997 {
3998         struct ieee80211_sub_if_data *sdata =
3999                 from_timer(sdata, t, u.mgd.timer);
4000
4001         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4002 }
4003
4004 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4005                                           u8 *bssid, u8 reason, bool tx)
4006 {
4007         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4008
4009         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4010                                tx, frame_buf);
4011
4012         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4013                                     reason);
4014 }
4015
4016 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4017 {
4018         struct ieee80211_local *local = sdata->local;
4019         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4020         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4021         u32 tx_flags = 0;
4022         u16 trans = 1;
4023         u16 status = 0;
4024         u16 prepare_tx_duration = 0;
4025
4026         sdata_assert_lock(sdata);
4027
4028         if (WARN_ON_ONCE(!auth_data))
4029                 return -EINVAL;
4030
4031         auth_data->tries++;
4032
4033         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4034                 sdata_info(sdata, "authentication with %pM timed out\n",
4035                            auth_data->bss->bssid);
4036
4037                 /*
4038                  * Most likely AP is not in the range so remove the
4039                  * bss struct for that AP.
4040                  */
4041                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4042
4043                 return -ETIMEDOUT;
4044         }
4045
4046         if (auth_data->algorithm == WLAN_AUTH_SAE)
4047                 prepare_tx_duration =
4048                         jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4049
4050         drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4051
4052         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4053                    auth_data->bss->bssid, auth_data->tries,
4054                    IEEE80211_AUTH_MAX_TRIES);
4055
4056         auth_data->expected_transaction = 2;
4057
4058         if (auth_data->algorithm == WLAN_AUTH_SAE) {
4059                 trans = auth_data->sae_trans;
4060                 status = auth_data->sae_status;
4061                 auth_data->expected_transaction = trans;
4062         }
4063
4064         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4065                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4066                            IEEE80211_TX_INTFL_MLME_CONN_TX;
4067
4068         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4069                             auth_data->data, auth_data->data_len,
4070                             auth_data->bss->bssid,
4071                             auth_data->bss->bssid, NULL, 0, 0,
4072                             tx_flags);
4073
4074         if (tx_flags == 0) {
4075                 if (auth_data->algorithm == WLAN_AUTH_SAE)
4076                         auth_data->timeout = jiffies +
4077                                 IEEE80211_AUTH_TIMEOUT_SAE;
4078                 else
4079                         auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4080         } else {
4081                 auth_data->timeout =
4082                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4083         }
4084
4085         auth_data->timeout_started = true;
4086         run_again(sdata, auth_data->timeout);
4087
4088         return 0;
4089 }
4090
4091 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4092 {
4093         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4094         struct ieee80211_local *local = sdata->local;
4095
4096         sdata_assert_lock(sdata);
4097
4098         assoc_data->tries++;
4099         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4100                 sdata_info(sdata, "association with %pM timed out\n",
4101                            assoc_data->bss->bssid);
4102
4103                 /*
4104                  * Most likely AP is not in the range so remove the
4105                  * bss struct for that AP.
4106                  */
4107                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4108
4109                 return -ETIMEDOUT;
4110         }
4111
4112         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4113                    assoc_data->bss->bssid, assoc_data->tries,
4114                    IEEE80211_ASSOC_MAX_TRIES);
4115         ieee80211_send_assoc(sdata);
4116
4117         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4118                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4119                 assoc_data->timeout_started = true;
4120                 run_again(sdata, assoc_data->timeout);
4121         } else {
4122                 assoc_data->timeout =
4123                         round_jiffies_up(jiffies +
4124                                          IEEE80211_ASSOC_TIMEOUT_LONG);
4125                 assoc_data->timeout_started = true;
4126                 run_again(sdata, assoc_data->timeout);
4127         }
4128
4129         return 0;
4130 }
4131
4132 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4133                                   __le16 fc, bool acked)
4134 {
4135         struct ieee80211_local *local = sdata->local;
4136
4137         sdata->u.mgd.status_fc = fc;
4138         sdata->u.mgd.status_acked = acked;
4139         sdata->u.mgd.status_received = true;
4140
4141         ieee80211_queue_work(&local->hw, &sdata->work);
4142 }
4143
4144 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4145 {
4146         struct ieee80211_local *local = sdata->local;
4147         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4148
4149         sdata_lock(sdata);
4150
4151         if (ifmgd->status_received) {
4152                 __le16 fc = ifmgd->status_fc;
4153                 bool status_acked = ifmgd->status_acked;
4154
4155                 ifmgd->status_received = false;
4156                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4157                         if (status_acked) {
4158                                 if (ifmgd->auth_data->algorithm ==
4159                                     WLAN_AUTH_SAE)
4160                                         ifmgd->auth_data->timeout =
4161                                                 jiffies +
4162                                                 IEEE80211_AUTH_TIMEOUT_SAE;
4163                                 else
4164                                         ifmgd->auth_data->timeout =
4165                                                 jiffies +
4166                                                 IEEE80211_AUTH_TIMEOUT_SHORT;
4167                                 run_again(sdata, ifmgd->auth_data->timeout);
4168                         } else {
4169                                 ifmgd->auth_data->timeout = jiffies - 1;
4170                         }
4171                         ifmgd->auth_data->timeout_started = true;
4172                 } else if (ifmgd->assoc_data &&
4173                            (ieee80211_is_assoc_req(fc) ||
4174                             ieee80211_is_reassoc_req(fc))) {
4175                         if (status_acked) {
4176                                 ifmgd->assoc_data->timeout =
4177                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4178                                 run_again(sdata, ifmgd->assoc_data->timeout);
4179                         } else {
4180                                 ifmgd->assoc_data->timeout = jiffies - 1;
4181                         }
4182                         ifmgd->assoc_data->timeout_started = true;
4183                 }
4184         }
4185
4186         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4187             time_after(jiffies, ifmgd->auth_data->timeout)) {
4188                 if (ifmgd->auth_data->done) {
4189                         /*
4190                          * ok ... we waited for assoc but userspace didn't,
4191                          * so let's just kill the auth data
4192                          */
4193                         ieee80211_destroy_auth_data(sdata, false);
4194                 } else if (ieee80211_auth(sdata)) {
4195                         u8 bssid[ETH_ALEN];
4196                         struct ieee80211_event event = {
4197                                 .type = MLME_EVENT,
4198                                 .u.mlme.data = AUTH_EVENT,
4199                                 .u.mlme.status = MLME_TIMEOUT,
4200                         };
4201
4202                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4203
4204                         ieee80211_destroy_auth_data(sdata, false);
4205
4206                         cfg80211_auth_timeout(sdata->dev, bssid);
4207                         drv_event_callback(sdata->local, sdata, &event);
4208                 }
4209         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4210                 run_again(sdata, ifmgd->auth_data->timeout);
4211
4212         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4213             time_after(jiffies, ifmgd->assoc_data->timeout)) {
4214                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4215                     ieee80211_do_assoc(sdata)) {
4216                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4217                         struct ieee80211_event event = {
4218                                 .type = MLME_EVENT,
4219                                 .u.mlme.data = ASSOC_EVENT,
4220                                 .u.mlme.status = MLME_TIMEOUT,
4221                         };
4222
4223                         ieee80211_destroy_assoc_data(sdata, false, false);
4224                         cfg80211_assoc_timeout(sdata->dev, bss);
4225                         drv_event_callback(sdata->local, sdata, &event);
4226                 }
4227         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4228                 run_again(sdata, ifmgd->assoc_data->timeout);
4229
4230         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4231             ifmgd->associated) {
4232                 u8 bssid[ETH_ALEN];
4233                 int max_tries;
4234
4235                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4236
4237                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4238                         max_tries = max_nullfunc_tries;
4239                 else
4240                         max_tries = max_probe_tries;
4241
4242                 /* ACK received for nullfunc probing frame */
4243                 if (!ifmgd->probe_send_count)
4244                         ieee80211_reset_ap_probe(sdata);
4245                 else if (ifmgd->nullfunc_failed) {
4246                         if (ifmgd->probe_send_count < max_tries) {
4247                                 mlme_dbg(sdata,
4248                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4249                                          bssid, ifmgd->probe_send_count,
4250                                          max_tries);
4251                                 ieee80211_mgd_probe_ap_send(sdata);
4252                         } else {
4253                                 mlme_dbg(sdata,
4254                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4255                                          bssid);
4256                                 ieee80211_sta_connection_lost(sdata, bssid,
4257                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4258                                         false);
4259                         }
4260                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4261                         run_again(sdata, ifmgd->probe_timeout);
4262                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4263                         mlme_dbg(sdata,
4264                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4265                                  bssid, probe_wait_ms);
4266                         ieee80211_sta_connection_lost(sdata, bssid,
4267                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4268                 } else if (ifmgd->probe_send_count < max_tries) {
4269                         mlme_dbg(sdata,
4270                                  "No probe response from AP %pM after %dms, try %d/%i\n",
4271                                  bssid, probe_wait_ms,
4272                                  ifmgd->probe_send_count, max_tries);
4273                         ieee80211_mgd_probe_ap_send(sdata);
4274                 } else {
4275                         /*
4276                          * We actually lost the connection ... or did we?
4277                          * Let's make sure!
4278                          */
4279                         mlme_dbg(sdata,
4280                                  "No probe response from AP %pM after %dms, disconnecting.\n",
4281                                  bssid, probe_wait_ms);
4282
4283                         ieee80211_sta_connection_lost(sdata, bssid,
4284                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4285                 }
4286         }
4287
4288         sdata_unlock(sdata);
4289 }
4290
4291 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4292 {
4293         struct ieee80211_sub_if_data *sdata =
4294                 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4295         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4296
4297         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4298                 return;
4299
4300         sdata->u.mgd.connection_loss = false;
4301         ieee80211_queue_work(&sdata->local->hw,
4302                              &sdata->u.mgd.beacon_connection_loss_work);
4303 }
4304
4305 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4306 {
4307         struct ieee80211_sub_if_data *sdata =
4308                 from_timer(sdata, t, u.mgd.conn_mon_timer);
4309         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4310         struct ieee80211_local *local = sdata->local;
4311
4312         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4313                 return;
4314
4315         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4316 }
4317
4318 static void ieee80211_sta_monitor_work(struct work_struct *work)
4319 {
4320         struct ieee80211_sub_if_data *sdata =
4321                 container_of(work, struct ieee80211_sub_if_data,
4322                              u.mgd.monitor_work);
4323
4324         ieee80211_mgd_probe_ap(sdata, false);
4325 }
4326
4327 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4328 {
4329         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4330                 __ieee80211_stop_poll(sdata);
4331
4332                 /* let's probe the connection once */
4333                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4334                         ieee80211_queue_work(&sdata->local->hw,
4335                                              &sdata->u.mgd.monitor_work);
4336         }
4337 }
4338
4339 #ifdef CONFIG_PM
4340 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4341 {
4342         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4343         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4344
4345         sdata_lock(sdata);
4346
4347         if (ifmgd->auth_data || ifmgd->assoc_data) {
4348                 const u8 *bssid = ifmgd->auth_data ?
4349                                 ifmgd->auth_data->bss->bssid :
4350                                 ifmgd->assoc_data->bss->bssid;
4351
4352                 /*
4353                  * If we are trying to authenticate / associate while suspending,
4354                  * cfg80211 won't know and won't actually abort those attempts,
4355                  * thus we need to do that ourselves.
4356                  */
4357                 ieee80211_send_deauth_disassoc(sdata, bssid,
4358                                                IEEE80211_STYPE_DEAUTH,
4359                                                WLAN_REASON_DEAUTH_LEAVING,
4360                                                false, frame_buf);
4361                 if (ifmgd->assoc_data)
4362                         ieee80211_destroy_assoc_data(sdata, false, true);
4363                 if (ifmgd->auth_data)
4364                         ieee80211_destroy_auth_data(sdata, false);
4365                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4366                                       IEEE80211_DEAUTH_FRAME_LEN);
4367         }
4368
4369         /* This is a bit of a hack - we should find a better and more generic
4370          * solution to this. Normally when suspending, cfg80211 will in fact
4371          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4372          * auth (not so important) or assoc (this is the problem) process.
4373          *
4374          * As a consequence, it can happen that we are in the process of both
4375          * associating and suspending, and receive an association response
4376          * after cfg80211 has checked if it needs to disconnect, but before
4377          * we actually set the flag to drop incoming frames. This will then
4378          * cause the workqueue flush to process the association response in
4379          * the suspend, resulting in a successful association just before it
4380          * tries to remove the interface from the driver, which now though
4381          * has a channel context assigned ... this results in issues.
4382          *
4383          * To work around this (for now) simply deauth here again if we're
4384          * now connected.
4385          */
4386         if (ifmgd->associated && !sdata->local->wowlan) {
4387                 u8 bssid[ETH_ALEN];
4388                 struct cfg80211_deauth_request req = {
4389                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4390                         .bssid = bssid,
4391                 };
4392
4393                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4394                 ieee80211_mgd_deauth(sdata, &req);
4395         }
4396
4397         sdata_unlock(sdata);
4398 }
4399
4400 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4401 {
4402         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4403
4404         sdata_lock(sdata);
4405         if (!ifmgd->associated) {
4406                 sdata_unlock(sdata);
4407                 return;
4408         }
4409
4410         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4411                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4412                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4413                 ieee80211_sta_connection_lost(sdata,
4414                                               ifmgd->associated->bssid,
4415                                               WLAN_REASON_UNSPECIFIED,
4416                                               true);
4417                 sdata_unlock(sdata);
4418                 return;
4419         }
4420         sdata_unlock(sdata);
4421 }
4422 #endif
4423
4424 /* interface setup */
4425 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4426 {
4427         struct ieee80211_if_managed *ifmgd;
4428
4429         ifmgd = &sdata->u.mgd;
4430         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4431         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4432         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4433                   ieee80211_beacon_connection_loss_work);
4434         INIT_WORK(&ifmgd->csa_connection_drop_work,
4435                   ieee80211_csa_connection_drop_work);
4436         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4437         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4438                           ieee80211_tdls_peer_del_work);
4439         timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4440         timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4441         timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4442         timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4443         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4444                           ieee80211_sta_handle_tspec_ac_params_wk);
4445
4446         ifmgd->flags = 0;
4447         ifmgd->powersave = sdata->wdev.ps;
4448         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4449         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4450         ifmgd->p2p_noa_index = -1;
4451
4452         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4453                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4454         else
4455                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4456
4457         /* Setup TDLS data */
4458         spin_lock_init(&ifmgd->teardown_lock);
4459         ifmgd->teardown_skb = NULL;
4460         ifmgd->orig_teardown_skb = NULL;
4461 }
4462
4463 /* scan finished notification */
4464 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4465 {
4466         struct ieee80211_sub_if_data *sdata;
4467
4468         /* Restart STA timers */
4469         rcu_read_lock();
4470         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4471                 if (ieee80211_sdata_running(sdata))
4472                         ieee80211_restart_sta_timer(sdata);
4473         }
4474         rcu_read_unlock();
4475 }
4476
4477 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4478                                      struct cfg80211_bss *cbss)
4479 {
4480         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4481         const u8 *ht_cap_ie, *vht_cap_ie;
4482         const struct ieee80211_ht_cap *ht_cap;
4483         const struct ieee80211_vht_cap *vht_cap;
4484         u8 chains = 1;
4485
4486         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4487                 return chains;
4488
4489         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4490         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4491                 ht_cap = (void *)(ht_cap_ie + 2);
4492                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4493                 /*
4494                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4495                  *       "Tx Unequal Modulation Supported" fields.
4496                  */
4497         }
4498
4499         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4500                 return chains;
4501
4502         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4503         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4504                 u8 nss;
4505                 u16 tx_mcs_map;
4506
4507                 vht_cap = (void *)(vht_cap_ie + 2);
4508                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4509                 for (nss = 8; nss > 0; nss--) {
4510                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4511                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4512                                 break;
4513                 }
4514                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4515                 chains = max(chains, nss);
4516         }
4517
4518         return chains;
4519 }
4520
4521 static bool
4522 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4523                                     const struct ieee80211_he_operation *he_op)
4524 {
4525         const struct ieee80211_sta_he_cap *sta_he_cap =
4526                 ieee80211_get_he_sta_cap(sband);
4527         u16 ap_min_req_set;
4528         int i;
4529
4530         if (!sta_he_cap || !he_op)
4531                 return false;
4532
4533         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4534
4535         /* Need to go over for 80MHz, 160MHz and for 80+80 */
4536         for (i = 0; i < 3; i++) {
4537                 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4538                         &sta_he_cap->he_mcs_nss_supp;
4539                 u16 sta_mcs_map_rx =
4540                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4541                 u16 sta_mcs_map_tx =
4542                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4543                 u8 nss;
4544                 bool verified = true;
4545
4546                 /*
4547                  * For each band there is a maximum of 8 spatial streams
4548                  * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4549                  * of 2 bits per NSS (1-8), with the values defined in enum
4550                  * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4551                  * capabilities aren't less than the AP's minimum requirements
4552                  * for this HE BSS per SS.
4553                  * It is enough to find one such band that meets the reqs.
4554                  */
4555                 for (nss = 8; nss > 0; nss--) {
4556                         u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4557                         u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4558                         u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4559
4560                         if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4561                                 continue;
4562
4563                         /*
4564                          * Make sure the HE AP doesn't require MCSs that aren't
4565                          * supported by the client
4566                          */
4567                         if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4568                             sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4569                             (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4570                                 verified = false;
4571                                 break;
4572                         }
4573                 }
4574
4575                 if (verified)
4576                         return true;
4577         }
4578
4579         /* If here, STA doesn't meet AP's HE min requirements */
4580         return false;
4581 }
4582
4583 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4584                                   struct cfg80211_bss *cbss)
4585 {
4586         struct ieee80211_local *local = sdata->local;
4587         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4588         const struct ieee80211_ht_cap *ht_cap = NULL;
4589         const struct ieee80211_ht_operation *ht_oper = NULL;
4590         const struct ieee80211_vht_operation *vht_oper = NULL;
4591         const struct ieee80211_he_operation *he_oper = NULL;
4592         struct ieee80211_supported_band *sband;
4593         struct cfg80211_chan_def chandef;
4594         int ret;
4595         u32 i;
4596         bool have_80mhz;
4597
4598         sband = local->hw.wiphy->bands[cbss->channel->band];
4599
4600         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4601                           IEEE80211_STA_DISABLE_80P80MHZ |
4602                           IEEE80211_STA_DISABLE_160MHZ);
4603
4604         rcu_read_lock();
4605
4606         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4607             sband->ht_cap.ht_supported) {
4608                 const u8 *ht_oper_ie, *ht_cap_ie;
4609
4610                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4611                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4612                         ht_oper = (void *)(ht_oper_ie + 2);
4613
4614                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4615                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4616                         ht_cap = (void *)(ht_cap_ie + 2);
4617
4618                 if (!ht_cap) {
4619                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4620                         ht_oper = NULL;
4621                 }
4622         }
4623
4624         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4625             sband->vht_cap.vht_supported) {
4626                 const u8 *vht_oper_ie, *vht_cap;
4627
4628                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4629                                                    WLAN_EID_VHT_OPERATION);
4630                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4631                         vht_oper = (void *)(vht_oper_ie + 2);
4632                 if (vht_oper && !ht_oper) {
4633                         vht_oper = NULL;
4634                         sdata_info(sdata,
4635                                    "AP advertised VHT without HT, disabling both\n");
4636                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4637                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4638                 }
4639
4640                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4641                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4642                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4643                         vht_oper = NULL;
4644                 }
4645         }
4646
4647         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
4648             ieee80211_get_he_sta_cap(sband)) {
4649                 const struct cfg80211_bss_ies *ies;
4650                 const u8 *he_oper_ie;
4651
4652                 ies = rcu_dereference(cbss->ies);
4653                 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4654                                                   ies->data, ies->len);
4655                 if (he_oper_ie &&
4656                     he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4657                         he_oper = (void *)(he_oper_ie + 3);
4658                 else
4659                         he_oper = NULL;
4660
4661                 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4662                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4663         }
4664
4665         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4666         have_80mhz = false;
4667         for (i = 0; i < sband->n_channels; i++) {
4668                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4669                                                 IEEE80211_CHAN_NO_80MHZ))
4670                         continue;
4671
4672                 have_80mhz = true;
4673                 break;
4674         }
4675
4676         if (!have_80mhz)
4677                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4678
4679         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4680                                                      cbss->channel,
4681                                                      ht_oper, vht_oper, he_oper,
4682                                                      &chandef, false);
4683
4684         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4685                                       local->rx_chains);
4686
4687         rcu_read_unlock();
4688
4689         /* will change later if needed */
4690         sdata->smps_mode = IEEE80211_SMPS_OFF;
4691
4692         mutex_lock(&local->mtx);
4693         /*
4694          * If this fails (possibly due to channel context sharing
4695          * on incompatible channels, e.g. 80+80 and 160 sharing the
4696          * same control channel) try to use a smaller bandwidth.
4697          */
4698         ret = ieee80211_vif_use_channel(sdata, &chandef,
4699                                         IEEE80211_CHANCTX_SHARED);
4700
4701         /* don't downgrade for 5 and 10 MHz channels, though. */
4702         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4703             chandef.width == NL80211_CHAN_WIDTH_10)
4704                 goto out;
4705
4706         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4707                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4708                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4709                                                 IEEE80211_CHANCTX_SHARED);
4710         }
4711  out:
4712         mutex_unlock(&local->mtx);
4713         return ret;
4714 }
4715
4716 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4717                                      struct cfg80211_bss *cbss, bool assoc,
4718                                      bool override)
4719 {
4720         struct ieee80211_local *local = sdata->local;
4721         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4722         struct ieee80211_bss *bss = (void *)cbss->priv;
4723         struct sta_info *new_sta = NULL;
4724         struct ieee80211_supported_band *sband;
4725         bool have_sta = false;
4726         int err;
4727
4728         sband = local->hw.wiphy->bands[cbss->channel->band];
4729
4730         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4731                 return -EINVAL;
4732
4733         /* If a reconfig is happening, bail out */
4734         if (local->in_reconfig)
4735                 return -EBUSY;
4736
4737         if (assoc) {
4738                 rcu_read_lock();
4739                 have_sta = sta_info_get(sdata, cbss->bssid);
4740                 rcu_read_unlock();
4741         }
4742
4743         if (!have_sta) {
4744                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4745                 if (!new_sta)
4746                         return -ENOMEM;
4747         }
4748
4749         /*
4750          * Set up the information for the new channel before setting the
4751          * new channel. We can't - completely race-free - change the basic
4752          * rates bitmap and the channel (sband) that it refers to, but if
4753          * we set it up before we at least avoid calling into the driver's
4754          * bss_info_changed() method with invalid information (since we do
4755          * call that from changing the channel - only for IDLE and perhaps
4756          * some others, but ...).
4757          *
4758          * So to avoid that, just set up all the new information before the
4759          * channel, but tell the driver to apply it only afterwards, since
4760          * it might need the new channel for that.
4761          */
4762         if (new_sta) {
4763                 u32 rates = 0, basic_rates = 0;
4764                 bool have_higher_than_11mbit;
4765                 int min_rate = INT_MAX, min_rate_index = -1;
4766                 const struct cfg80211_bss_ies *ies;
4767                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4768
4769                 ieee80211_get_rates(sband, bss->supp_rates,
4770                                     bss->supp_rates_len,
4771                                     &rates, &basic_rates,
4772                                     &have_higher_than_11mbit,
4773                                     &min_rate, &min_rate_index,
4774                                     shift);
4775
4776                 /*
4777                  * This used to be a workaround for basic rates missing
4778                  * in the association response frame. Now that we no
4779                  * longer use the basic rates from there, it probably
4780                  * doesn't happen any more, but keep the workaround so
4781                  * in case some *other* APs are buggy in different ways
4782                  * we can connect -- with a warning.
4783                  */
4784                 if (!basic_rates && min_rate_index >= 0) {
4785                         sdata_info(sdata,
4786                                    "No basic rates, using min rate instead\n");
4787                         basic_rates = BIT(min_rate_index);
4788                 }
4789
4790                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4791                 sdata->vif.bss_conf.basic_rates = basic_rates;
4792
4793                 /* cf. IEEE 802.11 9.2.12 */
4794                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4795                     have_higher_than_11mbit)
4796                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4797                 else
4798                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4799
4800                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4801
4802                 /* set timing information */
4803                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4804                 rcu_read_lock();
4805                 ies = rcu_dereference(cbss->beacon_ies);
4806                 if (ies) {
4807                         const u8 *tim_ie;
4808
4809                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4810                         sdata->vif.bss_conf.sync_device_ts =
4811                                 bss->device_ts_beacon;
4812                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4813                                                   ies->data, ies->len);
4814                         if (tim_ie && tim_ie[1] >= 2)
4815                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4816                         else
4817                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4818                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4819                                                TIMING_BEACON_ONLY)) {
4820                         ies = rcu_dereference(cbss->proberesp_ies);
4821                         /* must be non-NULL since beacon IEs were NULL */
4822                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4823                         sdata->vif.bss_conf.sync_device_ts =
4824                                 bss->device_ts_presp;
4825                         sdata->vif.bss_conf.sync_dtim_count = 0;
4826                 } else {
4827                         sdata->vif.bss_conf.sync_tsf = 0;
4828                         sdata->vif.bss_conf.sync_device_ts = 0;
4829                         sdata->vif.bss_conf.sync_dtim_count = 0;
4830                 }
4831                 rcu_read_unlock();
4832         }
4833
4834         if (new_sta || override) {
4835                 err = ieee80211_prep_channel(sdata, cbss);
4836                 if (err) {
4837                         if (new_sta)
4838                                 sta_info_free(local, new_sta);
4839                         return -EINVAL;
4840                 }
4841         }
4842
4843         if (new_sta) {
4844                 /*
4845                  * tell driver about BSSID, basic rates and timing
4846                  * this was set up above, before setting the channel
4847                  */
4848                 ieee80211_bss_info_change_notify(sdata,
4849                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4850                         BSS_CHANGED_BEACON_INT);
4851
4852                 if (assoc)
4853                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4854
4855                 err = sta_info_insert(new_sta);
4856                 new_sta = NULL;
4857                 if (err) {
4858                         sdata_info(sdata,
4859                                    "failed to insert STA entry for the AP (error %d)\n",
4860                                    err);
4861                         return err;
4862                 }
4863         } else
4864                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4865
4866         /* Cancel scan to ensure that nothing interferes with connection */
4867         if (local->scanning)
4868                 ieee80211_scan_cancel(local);
4869
4870         return 0;
4871 }
4872
4873 /* config hooks */
4874 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4875                        struct cfg80211_auth_request *req)
4876 {
4877         struct ieee80211_local *local = sdata->local;
4878         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4879         struct ieee80211_mgd_auth_data *auth_data;
4880         u16 auth_alg;
4881         int err;
4882
4883         /* prepare auth data structure */
4884
4885         switch (req->auth_type) {
4886         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4887                 auth_alg = WLAN_AUTH_OPEN;
4888                 break;
4889         case NL80211_AUTHTYPE_SHARED_KEY:
4890                 if (IS_ERR(local->wep_tx_tfm))
4891                         return -EOPNOTSUPP;
4892                 auth_alg = WLAN_AUTH_SHARED_KEY;
4893                 break;
4894         case NL80211_AUTHTYPE_FT:
4895                 auth_alg = WLAN_AUTH_FT;
4896                 break;
4897         case NL80211_AUTHTYPE_NETWORK_EAP:
4898                 auth_alg = WLAN_AUTH_LEAP;
4899                 break;
4900         case NL80211_AUTHTYPE_SAE:
4901                 auth_alg = WLAN_AUTH_SAE;
4902                 break;
4903         case NL80211_AUTHTYPE_FILS_SK:
4904                 auth_alg = WLAN_AUTH_FILS_SK;
4905                 break;
4906         case NL80211_AUTHTYPE_FILS_SK_PFS:
4907                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4908                 break;
4909         case NL80211_AUTHTYPE_FILS_PK:
4910                 auth_alg = WLAN_AUTH_FILS_PK;
4911                 break;
4912         default:
4913                 return -EOPNOTSUPP;
4914         }
4915
4916         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4917                             req->ie_len, GFP_KERNEL);
4918         if (!auth_data)
4919                 return -ENOMEM;
4920
4921         auth_data->bss = req->bss;
4922
4923         if (req->auth_data_len >= 4) {
4924                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4925                         __le16 *pos = (__le16 *) req->auth_data;
4926
4927                         auth_data->sae_trans = le16_to_cpu(pos[0]);
4928                         auth_data->sae_status = le16_to_cpu(pos[1]);
4929                 }
4930                 memcpy(auth_data->data, req->auth_data + 4,
4931                        req->auth_data_len - 4);
4932                 auth_data->data_len += req->auth_data_len - 4;
4933         }
4934
4935         if (req->ie && req->ie_len) {
4936                 memcpy(&auth_data->data[auth_data->data_len],
4937                        req->ie, req->ie_len);
4938                 auth_data->data_len += req->ie_len;
4939         }
4940
4941         if (req->key && req->key_len) {
4942                 auth_data->key_len = req->key_len;
4943                 auth_data->key_idx = req->key_idx;
4944                 memcpy(auth_data->key, req->key, req->key_len);
4945         }
4946
4947         auth_data->algorithm = auth_alg;
4948
4949         /* try to authenticate/probe */
4950
4951         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4952             ifmgd->assoc_data) {
4953                 err = -EBUSY;
4954                 goto err_free;
4955         }
4956
4957         if (ifmgd->auth_data)
4958                 ieee80211_destroy_auth_data(sdata, false);
4959
4960         /* prep auth_data so we don't go into idle on disassoc */
4961         ifmgd->auth_data = auth_data;
4962
4963         if (ifmgd->associated) {
4964                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4965
4966                 sdata_info(sdata,
4967                            "disconnect from AP %pM for new auth to %pM\n",
4968                            ifmgd->associated->bssid, req->bss->bssid);
4969                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4970                                        WLAN_REASON_UNSPECIFIED,
4971                                        false, frame_buf);
4972
4973                 ieee80211_report_disconnect(sdata, frame_buf,
4974                                             sizeof(frame_buf), true,
4975                                             WLAN_REASON_UNSPECIFIED);
4976         }
4977
4978         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4979
4980         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4981         if (err)
4982                 goto err_clear;
4983
4984         err = ieee80211_auth(sdata);
4985         if (err) {
4986                 sta_info_destroy_addr(sdata, req->bss->bssid);
4987                 goto err_clear;
4988         }
4989
4990         /* hold our own reference */
4991         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4992         return 0;
4993
4994  err_clear:
4995         eth_zero_addr(ifmgd->bssid);
4996         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4997         ifmgd->auth_data = NULL;
4998         mutex_lock(&sdata->local->mtx);
4999         ieee80211_vif_release_channel(sdata);
5000         mutex_unlock(&sdata->local->mtx);
5001  err_free:
5002         kfree(auth_data);
5003         return err;
5004 }
5005
5006 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5007                         struct cfg80211_assoc_request *req)
5008 {
5009         struct ieee80211_local *local = sdata->local;
5010         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5011         struct ieee80211_bss *bss = (void *)req->bss->priv;
5012         struct ieee80211_mgd_assoc_data *assoc_data;
5013         const struct cfg80211_bss_ies *beacon_ies;
5014         struct ieee80211_supported_band *sband;
5015         const u8 *ssidie, *ht_ie, *vht_ie;
5016         int i, err;
5017         bool override = false;
5018
5019         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5020         if (!assoc_data)
5021                 return -ENOMEM;
5022
5023         rcu_read_lock();
5024         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5025         if (!ssidie) {
5026                 rcu_read_unlock();
5027                 kfree(assoc_data);
5028                 return -EINVAL;
5029         }
5030         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5031         assoc_data->ssid_len = ssidie[1];
5032         rcu_read_unlock();
5033
5034         if (ifmgd->associated) {
5035                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5036
5037                 sdata_info(sdata,
5038                            "disconnect from AP %pM for new assoc to %pM\n",
5039                            ifmgd->associated->bssid, req->bss->bssid);
5040                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5041                                        WLAN_REASON_UNSPECIFIED,
5042                                        false, frame_buf);
5043
5044                 ieee80211_report_disconnect(sdata, frame_buf,
5045                                             sizeof(frame_buf), true,
5046                                             WLAN_REASON_UNSPECIFIED);
5047         }
5048
5049         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5050                 err = -EBUSY;
5051                 goto err_free;
5052         }
5053
5054         if (ifmgd->assoc_data) {
5055                 err = -EBUSY;
5056                 goto err_free;
5057         }
5058
5059         if (ifmgd->auth_data) {
5060                 bool match;
5061
5062                 /* keep sta info, bssid if matching */
5063                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5064                 ieee80211_destroy_auth_data(sdata, match);
5065         }
5066
5067         /* prepare assoc data */
5068
5069         ifmgd->beacon_crc_valid = false;
5070
5071         assoc_data->wmm = bss->wmm_used &&
5072                           (local->hw.queues >= IEEE80211_NUM_ACS);
5073
5074         /*
5075          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5076          * We still associate in non-HT mode (11a/b/g) if any one of these
5077          * ciphers is configured as pairwise.
5078          * We can set this to true for non-11n hardware, that'll be checked
5079          * separately along with the peer capabilities.
5080          */
5081         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5082                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5083                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5084                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5085                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5086                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5087                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5088                         netdev_info(sdata->dev,
5089                                     "disabling HE/HT/VHT due to WEP/TKIP use\n");
5090                 }
5091         }
5092
5093         /* Also disable HT if we don't support it or the AP doesn't use WMM */
5094         sband = local->hw.wiphy->bands[req->bss->channel->band];
5095         if (!sband->ht_cap.ht_supported ||
5096             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5097             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5098                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5099                 if (!bss->wmm_used &&
5100                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5101                         netdev_info(sdata->dev,
5102                                     "disabling HT as WMM/QoS is not supported by the AP\n");
5103         }
5104
5105         /* disable VHT if we don't support it or the AP doesn't use WMM */
5106         if (!sband->vht_cap.vht_supported ||
5107             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5108             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5109                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5110                 if (!bss->wmm_used &&
5111                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5112                         netdev_info(sdata->dev,
5113                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
5114         }
5115
5116         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5117         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5118                sizeof(ifmgd->ht_capa_mask));
5119
5120         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5121         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5122                sizeof(ifmgd->vht_capa_mask));
5123
5124         if (req->ie && req->ie_len) {
5125                 memcpy(assoc_data->ie, req->ie, req->ie_len);
5126                 assoc_data->ie_len = req->ie_len;
5127         }
5128
5129         if (req->fils_kek) {
5130                 /* should already be checked in cfg80211 - so warn */
5131                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5132                         err = -EINVAL;
5133                         goto err_free;
5134                 }
5135                 memcpy(assoc_data->fils_kek, req->fils_kek,
5136                        req->fils_kek_len);
5137                 assoc_data->fils_kek_len = req->fils_kek_len;
5138         }
5139
5140         if (req->fils_nonces)
5141                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5142                        2 * FILS_NONCE_LEN);
5143
5144         assoc_data->bss = req->bss;
5145
5146         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5147                 if (ifmgd->powersave)
5148                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5149                 else
5150                         sdata->smps_mode = IEEE80211_SMPS_OFF;
5151         } else
5152                 sdata->smps_mode = ifmgd->req_smps;
5153
5154         assoc_data->capability = req->bss->capability;
5155         assoc_data->supp_rates = bss->supp_rates;
5156         assoc_data->supp_rates_len = bss->supp_rates_len;
5157
5158         rcu_read_lock();
5159         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5160         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5161                 assoc_data->ap_ht_param =
5162                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5163         else
5164                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5165         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5166         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5167                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5168                        sizeof(struct ieee80211_vht_cap));
5169         else
5170                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5171         rcu_read_unlock();
5172
5173         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5174                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5175              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5176                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5177
5178         if (bss->wmm_used && bss->uapsd_supported &&
5179             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5180                 assoc_data->uapsd = true;
5181                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5182         } else {
5183                 assoc_data->uapsd = false;
5184                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5185         }
5186
5187         if (req->prev_bssid)
5188                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5189
5190         if (req->use_mfp) {
5191                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5192                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5193         } else {
5194                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5195                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5196         }
5197
5198         if (req->flags & ASSOC_REQ_USE_RRM)
5199                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5200         else
5201                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5202
5203         if (req->crypto.control_port)
5204                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5205         else
5206                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5207
5208         sdata->control_port_protocol = req->crypto.control_port_ethertype;
5209         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5210         sdata->control_port_over_nl80211 =
5211                                         req->crypto.control_port_over_nl80211;
5212         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5213                                                         sdata->vif.type);
5214
5215         /* kick off associate process */
5216
5217         ifmgd->assoc_data = assoc_data;
5218         ifmgd->dtim_period = 0;
5219         ifmgd->have_beacon = false;
5220
5221         /* override HT/VHT configuration only if the AP and we support it */
5222         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5223                 struct ieee80211_sta_ht_cap sta_ht_cap;
5224
5225                 if (req->flags & ASSOC_REQ_DISABLE_HT)
5226                         override = true;
5227
5228                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5229                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5230
5231                 /* check for 40 MHz disable override */
5232                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5233                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5234                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5235                         override = true;
5236
5237                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5238                     req->flags & ASSOC_REQ_DISABLE_VHT)
5239                         override = true;
5240         }
5241
5242         if (req->flags & ASSOC_REQ_DISABLE_HT) {
5243                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5244                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5245         }
5246
5247         if (req->flags & ASSOC_REQ_DISABLE_VHT)
5248                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5249
5250         err = ieee80211_prep_connection(sdata, req->bss, true, override);
5251         if (err)
5252                 goto err_clear;
5253
5254         rcu_read_lock();
5255         beacon_ies = rcu_dereference(req->bss->beacon_ies);
5256
5257         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5258             !beacon_ies) {
5259                 /*
5260                  * Wait up to one beacon interval ...
5261                  * should this be more if we miss one?
5262                  */
5263                 sdata_info(sdata, "waiting for beacon from %pM\n",
5264                            ifmgd->bssid);
5265                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5266                 assoc_data->timeout_started = true;
5267                 assoc_data->need_beacon = true;
5268         } else if (beacon_ies) {
5269                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
5270                                                     beacon_ies->data,
5271                                                     beacon_ies->len);
5272                 u8 dtim_count = 0;
5273
5274                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
5275                         const struct ieee80211_tim_ie *tim;
5276                         tim = (void *)(tim_ie + 2);
5277                         ifmgd->dtim_period = tim->dtim_period;
5278                         dtim_count = tim->dtim_count;
5279                 }
5280                 ifmgd->have_beacon = true;
5281                 assoc_data->timeout = jiffies;
5282                 assoc_data->timeout_started = true;
5283
5284                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5285                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5286                         sdata->vif.bss_conf.sync_device_ts =
5287                                 bss->device_ts_beacon;
5288                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5289                 }
5290         } else {
5291                 assoc_data->timeout = jiffies;
5292                 assoc_data->timeout_started = true;
5293         }
5294         rcu_read_unlock();
5295
5296         run_again(sdata, assoc_data->timeout);
5297
5298         if (bss->corrupt_data) {
5299                 char *corrupt_type = "data";
5300                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5301                         if (bss->corrupt_data &
5302                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
5303                                 corrupt_type = "beacon and probe response";
5304                         else
5305                                 corrupt_type = "beacon";
5306                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5307                         corrupt_type = "probe response";
5308                 sdata_info(sdata, "associating with AP with corrupt %s\n",
5309                            corrupt_type);
5310         }
5311
5312         return 0;
5313  err_clear:
5314         eth_zero_addr(ifmgd->bssid);
5315         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5316         ifmgd->assoc_data = NULL;
5317  err_free:
5318         kfree(assoc_data);
5319         return err;
5320 }
5321
5322 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5323                          struct cfg80211_deauth_request *req)
5324 {
5325         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5326         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5327         bool tx = !req->local_state_change;
5328
5329         if (ifmgd->auth_data &&
5330             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5331                 sdata_info(sdata,
5332                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5333                            req->bssid, req->reason_code,
5334                            ieee80211_get_reason_code_string(req->reason_code));
5335
5336                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5337                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5338                                                IEEE80211_STYPE_DEAUTH,
5339                                                req->reason_code, tx,
5340                                                frame_buf);
5341                 ieee80211_destroy_auth_data(sdata, false);
5342                 ieee80211_report_disconnect(sdata, frame_buf,
5343                                             sizeof(frame_buf), true,
5344                                             req->reason_code);
5345
5346                 return 0;
5347         }
5348
5349         if (ifmgd->assoc_data &&
5350             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5351                 sdata_info(sdata,
5352                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
5353                            req->bssid, req->reason_code,
5354                            ieee80211_get_reason_code_string(req->reason_code));
5355
5356                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5357                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5358                                                IEEE80211_STYPE_DEAUTH,
5359                                                req->reason_code, tx,
5360                                                frame_buf);
5361                 ieee80211_destroy_assoc_data(sdata, false, true);
5362                 ieee80211_report_disconnect(sdata, frame_buf,
5363                                             sizeof(frame_buf), true,
5364                                             req->reason_code);
5365                 return 0;
5366         }
5367
5368         if (ifmgd->associated &&
5369             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5370                 sdata_info(sdata,
5371                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5372                            req->bssid, req->reason_code,
5373                            ieee80211_get_reason_code_string(req->reason_code));
5374
5375                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5376                                        req->reason_code, tx, frame_buf);
5377                 ieee80211_report_disconnect(sdata, frame_buf,
5378                                             sizeof(frame_buf), true,
5379                                             req->reason_code);
5380                 return 0;
5381         }
5382
5383         return -ENOTCONN;
5384 }
5385
5386 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5387                            struct cfg80211_disassoc_request *req)
5388 {
5389         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5390         u8 bssid[ETH_ALEN];
5391         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5392
5393         /*
5394          * cfg80211 should catch this ... but it's racy since
5395          * we can receive a disassoc frame, process it, hand it
5396          * to cfg80211 while that's in a locked section already
5397          * trying to tell us that the user wants to disconnect.
5398          */
5399         if (ifmgd->associated != req->bss)
5400                 return -ENOLINK;
5401
5402         sdata_info(sdata,
5403                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5404                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5405
5406         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5407         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5408                                req->reason_code, !req->local_state_change,
5409                                frame_buf);
5410
5411         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5412                                     req->reason_code);
5413
5414         return 0;
5415 }
5416
5417 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5418 {
5419         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5420
5421         /*
5422          * Make sure some work items will not run after this,
5423          * they will not do anything but might not have been
5424          * cancelled when disconnecting.
5425          */
5426         cancel_work_sync(&ifmgd->monitor_work);
5427         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5428         cancel_work_sync(&ifmgd->request_smps_work);
5429         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5430         cancel_work_sync(&ifmgd->chswitch_work);
5431         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5432
5433         sdata_lock(sdata);
5434         if (ifmgd->assoc_data) {
5435                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5436                 ieee80211_destroy_assoc_data(sdata, false, false);
5437                 cfg80211_assoc_timeout(sdata->dev, bss);
5438         }
5439         if (ifmgd->auth_data)
5440                 ieee80211_destroy_auth_data(sdata, false);
5441         spin_lock_bh(&ifmgd->teardown_lock);
5442         if (ifmgd->teardown_skb) {
5443                 kfree_skb(ifmgd->teardown_skb);
5444                 ifmgd->teardown_skb = NULL;
5445                 ifmgd->orig_teardown_skb = NULL;
5446         }
5447         spin_unlock_bh(&ifmgd->teardown_lock);
5448         del_timer_sync(&ifmgd->timer);
5449         sdata_unlock(sdata);
5450 }
5451
5452 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5453                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5454                                s32 rssi_level,
5455                                gfp_t gfp)
5456 {
5457         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5458
5459         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5460
5461         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5462 }
5463 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5464
5465 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5466 {
5467         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5468
5469         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5470
5471         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5472 }
5473 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);