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(&sdata->local->hw,
 224                                                 &he_oper_vht_cap, ht_oper,
 225                                                 &vht_chandef)) {
 226                         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
 227                                 sdata_info(sdata,
 228                                            "HE AP VHT information is invalid, disable HE\n");
 229                         ret = IEEE80211_STA_DISABLE_HE;
 230                         goto out;
 231                 }
 232         } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper,
 233                                                ht_oper, &vht_chandef)) {
 234                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 235                         sdata_info(sdata,
 236                                    "AP VHT information is invalid, disable VHT\n");
 237                 ret = IEEE80211_STA_DISABLE_VHT;
 238                 goto out;
 239         }
 240
 241         if (!cfg80211_chandef_valid(&vht_chandef)) {
 242                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 243                         sdata_info(sdata,
 244                                    "AP VHT information is invalid, disable VHT\n");
 245                 ret = IEEE80211_STA_DISABLE_VHT;
 246                 goto out;
 247         }
 248
 249         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 250                 ret = 0;
 251                 goto out;
 252         }
 253
 254         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 255                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 256                         sdata_info(sdata,
 257                                    "AP VHT information doesn't match HT, disable VHT\n");
 258                 ret = IEEE80211_STA_DISABLE_VHT;
 259                 goto out;
 260         }
 261
 262         *chandef = vht_chandef;
 263
 264         ret = 0;
 265
 266 out:
 267         /*
 268          * When tracking the current AP, don't do any further checks if the
 269          * new chandef is identical to the one we're currently using for the
 270          * connection. This keeps us from playing ping-pong with regulatory,
 271          * without it the following can happen (for example):
 272          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 273          *  - AP advertises regdom US
 274          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 275          *  - the code below detects an unsupported channel, downgrades, and
 276          *    we disconnect from the AP in the caller
 277          *  - disconnect causes CRDA to reload world regdomain and the game
 278          *    starts anew.
 279          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 280          *
 281          * It seems possible that there are still scenarios with CSA or real
 282          * bandwidth changes where a this could happen, but those cases are
 283          * less common and wouldn't completely prevent using the AP.
 284          */
 285         if (tracking &&
 286             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 287                 return ret;
 288
 289         /* don't print the message below for VHT mismatch if VHT is disabled */
 290         if (ret & IEEE80211_STA_DISABLE_VHT)
 291                 vht_chandef = *chandef;
 292
 293         /*
 294          * Ignore the DISABLED flag when we're already connected and only
 295          * tracking the APs beacon for bandwidth changes - otherwise we
 296          * might get disconnected here if we connect to an AP, update our
 297          * regulatory information based on the AP's country IE and the
 298          * information we have is wrong/outdated and disables the channel
 299          * that we're actually using for the connection to the AP.
 300          */
 301         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 302                                         tracking ? 0 :
 303                                                    IEEE80211_CHAN_DISABLED)) {
 304                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 305                         ret = IEEE80211_STA_DISABLE_HT |
 306                               IEEE80211_STA_DISABLE_VHT;
 307                         break;
 308                 }
 309
 310                 ret |= ieee80211_chandef_downgrade(chandef);
 311         }
 312
 313         if (chandef->width != vht_chandef.width && !tracking)
 314                 sdata_info(sdata,
 315                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 316
 317         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 318         return ret;
 319 }
 320
 321 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 322                                struct sta_info *sta,
 323                                const struct ieee80211_ht_cap *ht_cap,
 324                                const struct ieee80211_ht_operation *ht_oper,
 325                                const struct ieee80211_vht_operation *vht_oper,
 326                                const struct ieee80211_he_operation *he_oper,
 327                                const u8 *bssid, u32 *changed)
 328 {
 329         struct ieee80211_local *local = sdata->local;
 330         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 331         struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
 332         struct ieee80211_supported_band *sband =
 333                 local->hw.wiphy->bands[chan->band];
 334         struct cfg80211_chan_def chandef;
 335         u16 ht_opmode;
 336         u32 flags;
 337         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 338         int ret;
 339
 340         /* if HT was/is disabled, don't track any bandwidth changes */
 341         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 342                 return 0;
 343
 344         /* don't check VHT if we associated as non-VHT station */
 345         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 346                 vht_oper = NULL;
 347
 348         /* don't check HE if we associated as non-HE station */
 349         if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
 350             !ieee80211_get_he_sta_cap(sband))
 351                 he_oper = NULL;
 352
 353         if (WARN_ON_ONCE(!sta))
 354                 return -EINVAL;
 355
 356         /*
 357          * if bss configuration changed store the new one -
 358          * this may be applicable even if channel is identical
 359          */
 360         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 361         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 362                 *changed |= BSS_CHANGED_HT;
 363                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 364         }
 365
 366         /* calculate new channel (type) based on HT/VHT/HE operation IEs */
 367         flags = ieee80211_determine_chantype(sdata, sband, chan,
 368                                              ht_oper, vht_oper, he_oper,
 369                                              &chandef, true);
 370
 371         /*
 372          * Downgrade the new channel if we associated with restricted
 373          * capabilities. For example, if we associated as a 20 MHz STA
 374          * to a 40 MHz AP (due to regulatory, capabilities or config
 375          * reasons) then switching to a 40 MHz channel now won't do us
 376          * any good -- we couldn't use it with the AP.
 377          */
 378         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 379             chandef.width == NL80211_CHAN_WIDTH_80P80)
 380                 flags |= ieee80211_chandef_downgrade(&chandef);
 381         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 382             chandef.width == NL80211_CHAN_WIDTH_160)
 383                 flags |= ieee80211_chandef_downgrade(&chandef);
 384         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 385             chandef.width > NL80211_CHAN_WIDTH_20)
 386                 flags |= ieee80211_chandef_downgrade(&chandef);
 387
 388         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 389                 return 0;
 390
 391         sdata_info(sdata,
 392                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 393                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 394                    chandef.center_freq1, chandef.center_freq2);
 395
 396         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 397                                       IEEE80211_STA_DISABLE_VHT |
 398                                       IEEE80211_STA_DISABLE_40MHZ |
 399                                       IEEE80211_STA_DISABLE_80P80MHZ |
 400                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 401             !cfg80211_chandef_valid(&chandef)) {
 402                 sdata_info(sdata,
 403                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 404                            ifmgd->bssid);
 405                 return -EINVAL;
 406         }
 407
 408         switch (chandef.width) {
 409         case NL80211_CHAN_WIDTH_20_NOHT:
 410         case NL80211_CHAN_WIDTH_20:
 411                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 412                 break;
 413         case NL80211_CHAN_WIDTH_40:
 414                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 415                 break;
 416         case NL80211_CHAN_WIDTH_80:
 417                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 418                 break;
 419         case NL80211_CHAN_WIDTH_80P80:
 420         case NL80211_CHAN_WIDTH_160:
 421                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 422                 break;
 423         default:
 424                 return -EINVAL;
 425         }
 426
 427         if (new_sta_bw > sta->cur_max_bandwidth)
 428                 new_sta_bw = sta->cur_max_bandwidth;
 429
 430         if (new_sta_bw < sta->sta.bandwidth) {
 431                 sta->sta.bandwidth = new_sta_bw;
 432                 rate_control_rate_update(local, sband, sta,
 433                                          IEEE80211_RC_BW_CHANGED);
 434         }
 435
 436         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 437         if (ret) {
 438                 sdata_info(sdata,
 439                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 440                            ifmgd->bssid);
 441                 return ret;
 442         }
 443
 444         if (new_sta_bw > sta->sta.bandwidth) {
 445                 sta->sta.bandwidth = new_sta_bw;
 446                 rate_control_rate_update(local, sband, sta,
 447                                          IEEE80211_RC_BW_CHANGED);
 448         }
 449
 450         return 0;
 451 }
 452
 453 /* frame sending functions */
 454
 455 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 456                                 struct sk_buff *skb, u8 ap_ht_param,
 457                                 struct ieee80211_supported_band *sband,
 458                                 struct ieee80211_channel *channel,
 459                                 enum ieee80211_smps_mode smps)
 460 {
 461         u8 *pos;
 462         u32 flags = channel->flags;
 463         u16 cap;
 464         struct ieee80211_sta_ht_cap ht_cap;
 465
 466         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 467
 468         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 469         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 470
 471         /* determine capability flags */
 472         cap = ht_cap.cap;
 473
 474         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 475         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 476                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 477                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 478                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 479                 }
 480                 break;
 481         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 482                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 483                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 484                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 485                 }
 486                 break;
 487         }
 488
 489         /*
 490          * If 40 MHz was disabled associate as though we weren't
 491          * capable of 40 MHz -- some broken APs will never fall
 492          * back to trying to transmit in 20 MHz.
 493          */
 494         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 495                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 496                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 497         }
 498
 499         /* set SM PS mode properly */
 500         cap &= ~IEEE80211_HT_CAP_SM_PS;
 501         switch (smps) {
 502         case IEEE80211_SMPS_AUTOMATIC:
 503         case IEEE80211_SMPS_NUM_MODES:
 504                 WARN_ON(1);
 505                 /* fall through */
 506         case IEEE80211_SMPS_OFF:
 507                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 508                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 509                 break;
 510         case IEEE80211_SMPS_STATIC:
 511                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 512                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 513                 break;
 514         case IEEE80211_SMPS_DYNAMIC:
 515                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 516                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 517                 break;
 518         }
 519
 520         /* reserve and fill IE */
 521         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 522         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 523 }
 524
 525 /* This function determines vht capability flags for the association
 526  * and builds the IE.
 527  * Note - the function may set the owner of the MU-MIMO capability
 528  */
 529 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 530                                  struct sk_buff *skb,
 531                                  struct ieee80211_supported_band *sband,
 532                                  struct ieee80211_vht_cap *ap_vht_cap)
 533 {
 534         struct ieee80211_local *local = sdata->local;
 535         u8 *pos;
 536         u32 cap;
 537         struct ieee80211_sta_vht_cap vht_cap;
 538         u32 mask, ap_bf_sts, our_bf_sts;
 539
 540         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 541
 542         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 543         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 544
 545         /* determine capability flags */
 546         cap = vht_cap.cap;
 547
 548         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 549                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 550
 551                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 552                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 553                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 554                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 555         }
 556
 557         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 558                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 559                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 560         }
 561
 562         /*
 563          * Some APs apparently get confused if our capabilities are better
 564          * than theirs, so restrict what we advertise in the assoc request.
 565          */
 566         if (!(ap_vht_cap->vht_cap_info &
 567                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 568                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 569                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 570         else if (!(ap_vht_cap->vht_cap_info &
 571                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 572                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 573
 574         /*
 575          * If some other vif is using the MU-MIMO capablity we cannot associate
 576          * using MU-MIMO - this will lead to contradictions in the group-id
 577          * mechanism.
 578          * Ownership is defined since association request, in order to avoid
 579          * simultaneous associations with MU-MIMO.
 580          */
 581         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 582                 bool disable_mu_mimo = false;
 583                 struct ieee80211_sub_if_data *other;
 584
 585                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 586                         if (other->vif.mu_mimo_owner) {
 587                                 disable_mu_mimo = true;
 588                                 break;
 589                         }
 590                 }
 591                 if (disable_mu_mimo)
 592                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 593                 else
 594                         sdata->vif.mu_mimo_owner = true;
 595         }
 596
 597         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 598
 599         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 600         our_bf_sts = cap & mask;
 601
 602         if (ap_bf_sts < our_bf_sts) {
 603                 cap &= ~mask;
 604                 cap |= ap_bf_sts;
 605         }
 606
 607         /* reserve and fill IE */
 608         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 609         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 610 }
 611
 612 /* This function determines HE capability flags for the association
 613  * and builds the IE.
 614  */
 615 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
 616                                 struct sk_buff *skb,
 617                                 struct ieee80211_supported_band *sband)
 618 {
 619         u8 *pos;
 620         const struct ieee80211_sta_he_cap *he_cap = NULL;
 621         u8 he_cap_size;
 622
 623         he_cap = ieee80211_get_he_sta_cap(sband);
 624         if (!he_cap)
 625                 return;
 626
 627         /*
 628          * TODO: the 1 added is because this temporarily is under the EXTENSION
 629          * IE. Get rid of it when it moves.
 630          */
 631         he_cap_size =
 632                 2 + 1 + sizeof(he_cap->he_cap_elem) +
 633                 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
 634                 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
 635                                       he_cap->he_cap_elem.phy_cap_info);
 636         pos = skb_put(skb, he_cap_size);
 637         ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
 638 }
 639
 640 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 641 {
 642         struct ieee80211_local *local = sdata->local;
 643         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 644         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 645         struct sk_buff *skb;
 646         struct ieee80211_mgmt *mgmt;
 647         u8 *pos, qos_info;
 648         size_t offset = 0, noffset;
 649         int i, count, rates_len, supp_rates_len, shift;
 650         u16 capab;
 651         struct ieee80211_supported_band *sband;
 652         struct ieee80211_chanctx_conf *chanctx_conf;
 653         struct ieee80211_channel *chan;
 654         u32 rates = 0;
 655
 656         sdata_assert_lock(sdata);
 657
 658         rcu_read_lock();
 659         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 660         if (WARN_ON(!chanctx_conf)) {
 661                 rcu_read_unlock();
 662                 return;
 663         }
 664         chan = chanctx_conf->def.chan;
 665         rcu_read_unlock();
 666         sband = local->hw.wiphy->bands[chan->band];
 667         shift = ieee80211_vif_get_shift(&sdata->vif);
 668
 669         if (assoc_data->supp_rates_len) {
 670                 /*
 671                  * Get all rates supported by the device and the AP as
 672                  * some APs don't like getting a superset of their rates
 673                  * in the association request (e.g. D-Link DAP 1353 in
 674                  * b-only mode)...
 675                  */
 676                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 677                                                      assoc_data->supp_rates,
 678                                                      assoc_data->supp_rates_len,
 679                                                      &rates);
 680         } else {
 681                 /*
 682                  * In case AP not provide any supported rates information
 683                  * before association, we send information element(s) with
 684                  * all rates that we support.
 685                  */
 686                 rates_len = 0;
 687                 for (i = 0; i < sband->n_bitrates; i++) {
 688                         rates |= BIT(i);
 689                         rates_len++;
 690                 }
 691         }
 692
 693         skb = alloc_skb(local->hw.extra_tx_headroom +
 694                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 695                         2 + assoc_data->ssid_len + /* SSID */
 696                         4 + rates_len + /* (extended) rates */
 697                         4 + /* power capability */
 698                         2 + 2 * sband->n_channels + /* supported channels */
 699                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 700                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 701                         2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
 702                                 sizeof(struct ieee80211_he_mcs_nss_supp) +
 703                                 IEEE80211_HE_PPE_THRES_MAX_LEN +
 704                         assoc_data->ie_len + /* extra IEs */
 705                         (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
 706                         9, /* WMM */
 707                         GFP_KERNEL);
 708         if (!skb)
 709                 return;
 710
 711         skb_reserve(skb, local->hw.extra_tx_headroom);
 712
 713         capab = WLAN_CAPABILITY_ESS;
 714
 715         if (sband->band == NL80211_BAND_2GHZ) {
 716                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 717                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 718         }
 719
 720         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 721                 capab |= WLAN_CAPABILITY_PRIVACY;
 722
 723         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 724             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 725                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 726
 727         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 728                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 729
 730         mgmt = skb_put_zero(skb, 24);
 731         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 732         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 733         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 734
 735         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 736                 skb_put(skb, 10);
 737                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 738                                                   IEEE80211_STYPE_REASSOC_REQ);
 739                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 740                 mgmt->u.reassoc_req.listen_interval =
 741                                 cpu_to_le16(local->hw.conf.listen_interval);
 742                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 743                        ETH_ALEN);
 744         } else {
 745                 skb_put(skb, 4);
 746                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 747                                                   IEEE80211_STYPE_ASSOC_REQ);
 748                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 749                 mgmt->u.assoc_req.listen_interval =
 750                                 cpu_to_le16(local->hw.conf.listen_interval);
 751         }
 752
 753         /* SSID */
 754         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 755         *pos++ = WLAN_EID_SSID;
 756         *pos++ = assoc_data->ssid_len;
 757         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 758
 759         /* add all rates which were marked to be used above */
 760         supp_rates_len = rates_len;
 761         if (supp_rates_len > 8)
 762                 supp_rates_len = 8;
 763
 764         pos = skb_put(skb, supp_rates_len + 2);
 765         *pos++ = WLAN_EID_SUPP_RATES;
 766         *pos++ = supp_rates_len;
 767
 768         count = 0;
 769         for (i = 0; i < sband->n_bitrates; i++) {
 770                 if (BIT(i) & rates) {
 771                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 772                                                 5 * (1 << shift));
 773                         *pos++ = (u8) rate;
 774                         if (++count == 8)
 775                                 break;
 776                 }
 777         }
 778
 779         if (rates_len > count) {
 780                 pos = skb_put(skb, rates_len - count + 2);
 781                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 782                 *pos++ = rates_len - count;
 783
 784                 for (i++; i < sband->n_bitrates; i++) {
 785                         if (BIT(i) & rates) {
 786                                 int rate;
 787                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 788                                                     5 * (1 << shift));
 789                                 *pos++ = (u8) rate;
 790                         }
 791                 }
 792         }
 793
 794         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 795             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 796                 pos = skb_put(skb, 4);
 797                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 798                 *pos++ = 2;
 799                 *pos++ = 0; /* min tx power */
 800                  /* max tx power */
 801                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 802         }
 803
 804         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 805                 /* TODO: get this in reg domain format */
 806                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 807                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 808                 *pos++ = 2 * sband->n_channels;
 809                 for (i = 0; i < sband->n_channels; i++) {
 810                         *pos++ = ieee80211_frequency_to_channel(
 811                                         sband->channels[i].center_freq);
 812                         *pos++ = 1; /* one channel in the subband*/
 813                 }
 814         }
 815
 816         /* if present, add any custom IEs that go before HT */
 817         if (assoc_data->ie_len) {
 818                 static const u8 before_ht[] = {
 819                         WLAN_EID_SSID,
 820                         WLAN_EID_SUPP_RATES,
 821                         WLAN_EID_EXT_SUPP_RATES,
 822                         WLAN_EID_PWR_CAPABILITY,
 823                         WLAN_EID_SUPPORTED_CHANNELS,
 824                         WLAN_EID_RSN,
 825                         WLAN_EID_QOS_CAPA,
 826                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 827                         WLAN_EID_MOBILITY_DOMAIN,
 828                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 829                         WLAN_EID_RIC_DATA,              /* reassoc only */
 830                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 831                 };
 832                 static const u8 after_ric[] = {
 833                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 834                         WLAN_EID_HT_CAPABILITY,
 835                         WLAN_EID_BSS_COEX_2040,
 836                         /* luckily this is almost always there */
 837                         WLAN_EID_EXT_CAPABILITY,
 838                         WLAN_EID_QOS_TRAFFIC_CAPA,
 839                         WLAN_EID_TIM_BCAST_REQ,
 840                         WLAN_EID_INTERWORKING,
 841                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
 842                         WLAN_EID_VHT_CAPABILITY,
 843                         WLAN_EID_OPMODE_NOTIF,
 844                 };
 845
 846                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 847                                                  assoc_data->ie_len,
 848                                                  before_ht,
 849                                                  ARRAY_SIZE(before_ht),
 850                                                  after_ric,
 851                                                  ARRAY_SIZE(after_ric),
 852                                                  offset);
 853                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 854                 offset = noffset;
 855         }
 856
 857         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 858                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 859                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 860
 861         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 862                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 863                                     sband, chan, sdata->smps_mode);
 864
 865         /* if present, add any custom IEs that go before VHT */
 866         if (assoc_data->ie_len) {
 867                 static const u8 before_vht[] = {
 868                         /*
 869                          * no need to list the ones split off before HT
 870                          * or generated here
 871                          */
 872                         WLAN_EID_BSS_COEX_2040,
 873                         WLAN_EID_EXT_CAPABILITY,
 874                         WLAN_EID_QOS_TRAFFIC_CAPA,
 875                         WLAN_EID_TIM_BCAST_REQ,
 876                         WLAN_EID_INTERWORKING,
 877                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
 878                 };
 879
 880                 /* RIC already taken above, so no need to handle here anymore */
 881                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 882                                              before_vht, ARRAY_SIZE(before_vht),
 883                                              offset);
 884                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 885                 offset = noffset;
 886         }
 887
 888         /* if present, add any custom IEs that go before HE */
 889         if (assoc_data->ie_len) {
 890                 static const u8 before_he[] = {
 891                         /*
 892                          * no need to list the ones split off before VHT
 893                          * or generated here
 894                          */
 895                         WLAN_EID_OPMODE_NOTIF,
 896                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
 897                         /* 11ai elements */
 898                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
 899                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
 900                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
 901                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
 902                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
 903                         /* TODO: add 11ah/11aj/11ak elements */
 904                 };
 905
 906                 /* RIC already taken above, so no need to handle here anymore */
 907                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 908                                              before_he, ARRAY_SIZE(before_he),
 909                                              offset);
 910                 pos = skb_put(skb, noffset - offset);
 911                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 912                 offset = noffset;
 913         }
 914
 915         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 916                 ieee80211_add_vht_ie(sdata, skb, sband,
 917                                      &assoc_data->ap_vht_cap);
 918
 919         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
 920                 ieee80211_add_he_ie(sdata, skb, sband);
 921
 922         /* if present, add any custom non-vendor IEs that go after HE */
 923         if (assoc_data->ie_len) {
 924                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 925                                                     assoc_data->ie_len,
 926                                                     offset);
 927                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 928                 offset = noffset;
 929         }
 930
 931         if (assoc_data->wmm) {
 932                 if (assoc_data->uapsd) {
 933                         qos_info = ifmgd->uapsd_queues;
 934                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 935                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 936                 } else {
 937                         qos_info = 0;
 938                 }
 939
 940                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 941         }
 942
 943         /* add any remaining custom (i.e. vendor specific here) IEs */
 944         if (assoc_data->ie_len) {
 945                 noffset = assoc_data->ie_len;
 946                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 947         }
 948
 949         if (assoc_data->fils_kek_len &&
 950             fils_encrypt_assoc_req(skb, assoc_data) < 0) {
 951                 dev_kfree_skb(skb);
 952                 return;
 953         }
 954
 955         drv_mgd_prepare_tx(local, sdata, 0);
 956
 957         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 958         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 959                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 960                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 961         ieee80211_tx_skb(sdata, skb);
 962 }
 963
 964 void ieee80211_send_pspoll(struct ieee80211_local *local,
 965                            struct ieee80211_sub_if_data *sdata)
 966 {
 967         struct ieee80211_pspoll *pspoll;
 968         struct sk_buff *skb;
 969
 970         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 971         if (!skb)
 972                 return;
 973
 974         pspoll = (struct ieee80211_pspoll *) skb->data;
 975         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 976
 977         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 978         ieee80211_tx_skb(sdata, skb);
 979 }
 980
 981 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 982                              struct ieee80211_sub_if_data *sdata,
 983                              bool powersave)
 984 {
 985         struct sk_buff *skb;
 986         struct ieee80211_hdr_3addr *nullfunc;
 987         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 988
 989         /* Don't send NDPs when STA is connected HE */
 990         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
 991             !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
 992                 return;
 993
 994         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
 995                 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
 996         if (!skb)
 997                 return;
 998
 999         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1000         if (powersave)
1001                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1002
1003         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1004                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1005
1006         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1007                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1008
1009         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1010                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1011
1012         ieee80211_tx_skb(sdata, skb);
1013 }
1014
1015 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1016                                           struct ieee80211_sub_if_data *sdata)
1017 {
1018         struct sk_buff *skb;
1019         struct ieee80211_hdr *nullfunc;
1020         __le16 fc;
1021
1022         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1023                 return;
1024
1025         /* Don't send NDPs when connected HE */
1026         if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1027                 return;
1028
1029         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1030         if (!skb)
1031                 return;
1032
1033         skb_reserve(skb, local->hw.extra_tx_headroom);
1034
1035         nullfunc = skb_put_zero(skb, 30);
1036         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1037                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1038         nullfunc->frame_control = fc;
1039         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1040         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1041         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1042         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1043
1044         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1045         ieee80211_tx_skb(sdata, skb);
1046 }
1047
1048 /* spectrum management related things */
1049 static void ieee80211_chswitch_work(struct work_struct *work)
1050 {
1051         struct ieee80211_sub_if_data *sdata =
1052                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1053         struct ieee80211_local *local = sdata->local;
1054         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1055         int ret;
1056
1057         if (!ieee80211_sdata_running(sdata))
1058                 return;
1059
1060         sdata_lock(sdata);
1061         mutex_lock(&local->mtx);
1062         mutex_lock(&local->chanctx_mtx);
1063
1064         if (!ifmgd->associated)
1065                 goto out;
1066
1067         if (!sdata->vif.csa_active)
1068                 goto out;
1069
1070         /*
1071          * using reservation isn't immediate as it may be deferred until later
1072          * with multi-vif. once reservation is complete it will re-schedule the
1073          * work with no reserved_chanctx so verify chandef to check if it
1074          * completed successfully
1075          */
1076
1077         if (sdata->reserved_chanctx) {
1078                 struct ieee80211_supported_band *sband = NULL;
1079                 struct sta_info *mgd_sta = NULL;
1080                 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1081
1082                 /*
1083                  * with multi-vif csa driver may call ieee80211_csa_finish()
1084                  * many times while waiting for other interfaces to use their
1085                  * reservations
1086                  */
1087                 if (sdata->reserved_ready)
1088                         goto out;
1089
1090                 if (sdata->vif.bss_conf.chandef.width !=
1091                     sdata->csa_chandef.width) {
1092                         /*
1093                          * For managed interface, we need to also update the AP
1094                          * station bandwidth and align the rate scale algorithm
1095                          * on the bandwidth change. Here we only consider the
1096                          * bandwidth of the new channel definition (as channel
1097                          * switch flow does not have the full HT/VHT/HE
1098                          * information), assuming that if additional changes are
1099                          * required they would be done as part of the processing
1100                          * of the next beacon from the AP.
1101                          */
1102                         switch (sdata->csa_chandef.width) {
1103                         case NL80211_CHAN_WIDTH_20_NOHT:
1104                         case NL80211_CHAN_WIDTH_20:
1105                         default:
1106                                 bw = IEEE80211_STA_RX_BW_20;
1107                                 break;
1108                         case NL80211_CHAN_WIDTH_40:
1109                                 bw = IEEE80211_STA_RX_BW_40;
1110                                 break;
1111                         case NL80211_CHAN_WIDTH_80:
1112                                 bw = IEEE80211_STA_RX_BW_80;
1113                                 break;
1114                         case NL80211_CHAN_WIDTH_80P80:
1115                         case NL80211_CHAN_WIDTH_160:
1116                                 bw = IEEE80211_STA_RX_BW_160;
1117                                 break;
1118                         }
1119
1120                         mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1121                         sband =
1122                                 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1123                 }
1124
1125                 if (sdata->vif.bss_conf.chandef.width >
1126                     sdata->csa_chandef.width) {
1127                         mgd_sta->sta.bandwidth = bw;
1128                         rate_control_rate_update(local, sband, mgd_sta,
1129                                                  IEEE80211_RC_BW_CHANGED);
1130                 }
1131
1132                 ret = ieee80211_vif_use_reserved_context(sdata);
1133                 if (ret) {
1134                         sdata_info(sdata,
1135                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1136                                    ret);
1137                         ieee80211_queue_work(&sdata->local->hw,
1138                                              &ifmgd->csa_connection_drop_work);
1139                         goto out;
1140                 }
1141
1142                 if (sdata->vif.bss_conf.chandef.width <
1143                     sdata->csa_chandef.width) {
1144                         mgd_sta->sta.bandwidth = bw;
1145                         rate_control_rate_update(local, sband, mgd_sta,
1146                                                  IEEE80211_RC_BW_CHANGED);
1147                 }
1148
1149                 goto out;
1150         }
1151
1152         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1153                                         &sdata->csa_chandef)) {
1154                 sdata_info(sdata,
1155                            "failed to finalize channel switch, disconnecting\n");
1156                 ieee80211_queue_work(&sdata->local->hw,
1157                                      &ifmgd->csa_connection_drop_work);
1158                 goto out;
1159         }
1160
1161         /* XXX: shouldn't really modify cfg80211-owned data! */
1162         ifmgd->associated->channel = sdata->csa_chandef.chan;
1163
1164         ifmgd->csa_waiting_bcn = true;
1165
1166         ieee80211_sta_reset_beacon_monitor(sdata);
1167         ieee80211_sta_reset_conn_monitor(sdata);
1168
1169 out:
1170         mutex_unlock(&local->chanctx_mtx);
1171         mutex_unlock(&local->mtx);
1172         sdata_unlock(sdata);
1173 }
1174
1175 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1176 {
1177         struct ieee80211_local *local = sdata->local;
1178         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1179         int ret;
1180
1181         sdata_assert_lock(sdata);
1182
1183         WARN_ON(!sdata->vif.csa_active);
1184
1185         if (sdata->csa_block_tx) {
1186                 ieee80211_wake_vif_queues(local, sdata,
1187                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1188                 sdata->csa_block_tx = false;
1189         }
1190
1191         sdata->vif.csa_active = false;
1192         ifmgd->csa_waiting_bcn = false;
1193
1194         ret = drv_post_channel_switch(sdata);
1195         if (ret) {
1196                 sdata_info(sdata,
1197                            "driver post channel switch failed, disconnecting\n");
1198                 ieee80211_queue_work(&local->hw,
1199                                      &ifmgd->csa_connection_drop_work);
1200                 return;
1201         }
1202
1203         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1204 }
1205
1206 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1207 {
1208         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1209         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1210
1211         trace_api_chswitch_done(sdata, success);
1212         if (!success) {
1213                 sdata_info(sdata,
1214                            "driver channel switch failed, disconnecting\n");
1215                 ieee80211_queue_work(&sdata->local->hw,
1216                                      &ifmgd->csa_connection_drop_work);
1217         } else {
1218                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1219         }
1220 }
1221 EXPORT_SYMBOL(ieee80211_chswitch_done);
1222
1223 static void ieee80211_chswitch_timer(struct timer_list *t)
1224 {
1225         struct ieee80211_sub_if_data *sdata =
1226                 from_timer(sdata, t, u.mgd.chswitch_timer);
1227
1228         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1229 }
1230
1231 static void
1232 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1233                                  u64 timestamp, u32 device_timestamp,
1234                                  struct ieee802_11_elems *elems,
1235                                  bool beacon)
1236 {
1237         struct ieee80211_local *local = sdata->local;
1238         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1239         struct cfg80211_bss *cbss = ifmgd->associated;
1240         struct ieee80211_chanctx_conf *conf;
1241         struct ieee80211_chanctx *chanctx;
1242         enum nl80211_band current_band;
1243         struct ieee80211_csa_ie csa_ie;
1244         struct ieee80211_channel_switch ch_switch;
1245         int res;
1246
1247         sdata_assert_lock(sdata);
1248
1249         if (!cbss)
1250                 return;
1251
1252         if (local->scanning)
1253                 return;
1254
1255         /* disregard subsequent announcements if we are already processing */
1256         if (sdata->vif.csa_active)
1257                 return;
1258
1259         current_band = cbss->channel->band;
1260         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1261                                            ifmgd->flags,
1262                                            ifmgd->associated->bssid, &csa_ie);
1263         if (res < 0)
1264                 ieee80211_queue_work(&local->hw,
1265                                      &ifmgd->csa_connection_drop_work);
1266         if (res)
1267                 return;
1268
1269         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1270                                      IEEE80211_CHAN_DISABLED)) {
1271                 sdata_info(sdata,
1272                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1273                            ifmgd->associated->bssid,
1274                            csa_ie.chandef.chan->center_freq,
1275                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1276                            csa_ie.chandef.center_freq2);
1277                 ieee80211_queue_work(&local->hw,
1278                                      &ifmgd->csa_connection_drop_work);
1279                 return;
1280         }
1281
1282         if (cfg80211_chandef_identical(&csa_ie.chandef,
1283                                        &sdata->vif.bss_conf.chandef)) {
1284                 if (ifmgd->csa_ignored_same_chan)
1285                         return;
1286                 sdata_info(sdata,
1287                            "AP %pM tries to chanswitch to same channel, ignore\n",
1288                            ifmgd->associated->bssid);
1289                 ifmgd->csa_ignored_same_chan = true;
1290                 return;
1291         }
1292
1293         /*
1294          * Drop all TDLS peers - either we disconnect or move to a different
1295          * channel from this point on. There's no telling what our peer will do.
1296          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1297          * have an incompatible wider chandef.
1298          */
1299         ieee80211_teardown_tdls_peers(sdata);
1300
1301         mutex_lock(&local->mtx);
1302         mutex_lock(&local->chanctx_mtx);
1303         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1304                                          lockdep_is_held(&local->chanctx_mtx));
1305         if (!conf) {
1306                 sdata_info(sdata,
1307                            "no channel context assigned to vif?, disconnecting\n");
1308                 goto drop_connection;
1309         }
1310
1311         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1312
1313         if (local->use_chanctx &&
1314             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1315                 sdata_info(sdata,
1316                            "driver doesn't support chan-switch with channel contexts\n");
1317                 goto drop_connection;
1318         }
1319
1320         ch_switch.timestamp = timestamp;
1321         ch_switch.device_timestamp = device_timestamp;
1322         ch_switch.block_tx = csa_ie.mode;
1323         ch_switch.chandef = csa_ie.chandef;
1324         ch_switch.count = csa_ie.count;
1325
1326         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1327                 sdata_info(sdata,
1328                            "preparing for channel switch failed, disconnecting\n");
1329                 goto drop_connection;
1330         }
1331
1332         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1333                                             chanctx->mode, false);
1334         if (res) {
1335                 sdata_info(sdata,
1336                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1337                            res);
1338                 goto drop_connection;
1339         }
1340         mutex_unlock(&local->chanctx_mtx);
1341
1342         sdata->vif.csa_active = true;
1343         sdata->csa_chandef = csa_ie.chandef;
1344         sdata->csa_block_tx = csa_ie.mode;
1345         ifmgd->csa_ignored_same_chan = false;
1346
1347         if (sdata->csa_block_tx)
1348                 ieee80211_stop_vif_queues(local, sdata,
1349                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1350         mutex_unlock(&local->mtx);
1351
1352         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1353                                           csa_ie.count);
1354
1355         if (local->ops->channel_switch) {
1356                 /* use driver's channel switch callback */
1357                 drv_channel_switch(local, sdata, &ch_switch);
1358                 return;
1359         }
1360
1361         /* channel switch handled in software */
1362         if (csa_ie.count <= 1)
1363                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1364         else
1365                 mod_timer(&ifmgd->chswitch_timer,
1366                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1367                                          cbss->beacon_interval));
1368         return;
1369  drop_connection:
1370         /*
1371          * This is just so that the disconnect flow will know that
1372          * we were trying to switch channel and failed. In case the
1373          * mode is 1 (we are not allowed to Tx), we will know not to
1374          * send a deauthentication frame. Those two fields will be
1375          * reset when the disconnection worker runs.
1376          */
1377         sdata->vif.csa_active = true;
1378         sdata->csa_block_tx = csa_ie.mode;
1379
1380         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1381         mutex_unlock(&local->chanctx_mtx);
1382         mutex_unlock(&local->mtx);
1383 }
1384
1385 static bool
1386 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1387                                  struct ieee80211_channel *channel,
1388                                  const u8 *country_ie, u8 country_ie_len,
1389                                  const u8 *pwr_constr_elem,
1390                                  int *chan_pwr, int *pwr_reduction)
1391 {
1392         struct ieee80211_country_ie_triplet *triplet;
1393         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1394         int i, chan_increment;
1395         bool have_chan_pwr = false;
1396
1397         /* Invalid IE */
1398         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1399                 return false;
1400
1401         triplet = (void *)(country_ie + 3);
1402         country_ie_len -= 3;
1403
1404         switch (channel->band) {
1405         default:
1406                 WARN_ON_ONCE(1);
1407                 /* fall through */
1408         case NL80211_BAND_2GHZ:
1409         case NL80211_BAND_60GHZ:
1410                 chan_increment = 1;
1411                 break;
1412         case NL80211_BAND_5GHZ:
1413                 chan_increment = 4;
1414                 break;
1415         }
1416
1417         /* find channel */
1418         while (country_ie_len >= 3) {
1419                 u8 first_channel = triplet->chans.first_channel;
1420
1421                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1422                         goto next;
1423
1424                 for (i = 0; i < triplet->chans.num_channels; i++) {
1425                         if (first_channel + i * chan_increment == chan) {
1426                                 have_chan_pwr = true;
1427                                 *chan_pwr = triplet->chans.max_power;
1428                                 break;
1429                         }
1430                 }
1431                 if (have_chan_pwr)
1432                         break;
1433
1434  next:
1435                 triplet++;
1436                 country_ie_len -= 3;
1437         }
1438
1439         if (have_chan_pwr && pwr_constr_elem)
1440                 *pwr_reduction = *pwr_constr_elem;
1441         else
1442                 *pwr_reduction = 0;
1443
1444         return have_chan_pwr;
1445 }
1446
1447 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1448                                       struct ieee80211_channel *channel,
1449                                       const u8 *cisco_dtpc_ie,
1450                                       int *pwr_level)
1451 {
1452         /* From practical testing, the first data byte of the DTPC element
1453          * seems to contain the requested dBm level, and the CLI on Cisco
1454          * APs clearly state the range is -127 to 127 dBm, which indicates
1455          * a signed byte, although it seemingly never actually goes negative.
1456          * The other byte seems to always be zero.
1457          */
1458         *pwr_level = (__s8)cisco_dtpc_ie[4];
1459 }
1460
1461 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1462                                        struct ieee80211_channel *channel,
1463                                        struct ieee80211_mgmt *mgmt,
1464                                        const u8 *country_ie, u8 country_ie_len,
1465                                        const u8 *pwr_constr_ie,
1466                                        const u8 *cisco_dtpc_ie)
1467 {
1468         bool has_80211h_pwr = false, has_cisco_pwr = false;
1469         int chan_pwr = 0, pwr_reduction_80211h = 0;
1470         int pwr_level_cisco, pwr_level_80211h;
1471         int new_ap_level;
1472         __le16 capab = mgmt->u.probe_resp.capab_info;
1473
1474         if (country_ie &&
1475             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1476              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1477                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1478                         sdata, channel, country_ie, country_ie_len,
1479                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1480                 pwr_level_80211h =
1481                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1482         }
1483
1484         if (cisco_dtpc_ie) {
1485                 ieee80211_find_cisco_dtpc(
1486                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1487                 has_cisco_pwr = true;
1488         }
1489
1490         if (!has_80211h_pwr && !has_cisco_pwr)
1491                 return 0;
1492
1493         /* If we have both 802.11h and Cisco DTPC, apply both limits
1494          * by picking the smallest of the two power levels advertised.
1495          */
1496         if (has_80211h_pwr &&
1497             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1498                 new_ap_level = pwr_level_80211h;
1499
1500                 if (sdata->ap_power_level == new_ap_level)
1501                         return 0;
1502
1503                 sdata_dbg(sdata,
1504                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1505                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1506                           sdata->u.mgd.bssid);
1507         } else {  /* has_cisco_pwr is always true here. */
1508                 new_ap_level = pwr_level_cisco;
1509
1510                 if (sdata->ap_power_level == new_ap_level)
1511                         return 0;
1512
1513                 sdata_dbg(sdata,
1514                           "Limiting TX power to %d dBm as advertised by %pM\n",
1515                           pwr_level_cisco, sdata->u.mgd.bssid);
1516         }
1517
1518         sdata->ap_power_level = new_ap_level;
1519         if (__ieee80211_recalc_txpower(sdata))
1520                 return BSS_CHANGED_TXPOWER;
1521         return 0;
1522 }
1523
1524 /* powersave */
1525 static void ieee80211_enable_ps(struct ieee80211_local *local,
1526                                 struct ieee80211_sub_if_data *sdata)
1527 {
1528         struct ieee80211_conf *conf = &local->hw.conf;
1529
1530         /*
1531          * If we are scanning right now then the parameters will
1532          * take effect when scan finishes.
1533          */
1534         if (local->scanning)
1535                 return;
1536
1537         if (conf->dynamic_ps_timeout > 0 &&
1538             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1539                 mod_timer(&local->dynamic_ps_timer, jiffies +
1540                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1541         } else {
1542                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1543                         ieee80211_send_nullfunc(local, sdata, true);
1544
1545                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1546                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1547                         return;
1548
1549                 conf->flags |= IEEE80211_CONF_PS;
1550                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1551         }
1552 }
1553
1554 static void ieee80211_change_ps(struct ieee80211_local *local)
1555 {
1556         struct ieee80211_conf *conf = &local->hw.conf;
1557
1558         if (local->ps_sdata) {
1559                 ieee80211_enable_ps(local, local->ps_sdata);
1560         } else if (conf->flags & IEEE80211_CONF_PS) {
1561                 conf->flags &= ~IEEE80211_CONF_PS;
1562                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1563                 del_timer_sync(&local->dynamic_ps_timer);
1564                 cancel_work_sync(&local->dynamic_ps_enable_work);
1565         }
1566 }
1567
1568 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1569 {
1570         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1571         struct sta_info *sta = NULL;
1572         bool authorized = false;
1573
1574         if (!mgd->powersave)
1575                 return false;
1576
1577         if (mgd->broken_ap)
1578                 return false;
1579
1580         if (!mgd->associated)
1581                 return false;
1582
1583         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1584                 return false;
1585
1586         if (!mgd->have_beacon)
1587                 return false;
1588
1589         rcu_read_lock();
1590         sta = sta_info_get(sdata, mgd->bssid);
1591         if (sta)
1592                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1593         rcu_read_unlock();
1594
1595         return authorized;
1596 }
1597
1598 /* need to hold RTNL or interface lock */
1599 void ieee80211_recalc_ps(struct ieee80211_local *local)
1600 {
1601         struct ieee80211_sub_if_data *sdata, *found = NULL;
1602         int count = 0;
1603         int timeout;
1604
1605         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1606                 local->ps_sdata = NULL;
1607                 return;
1608         }
1609
1610         list_for_each_entry(sdata, &local->interfaces, list) {
1611                 if (!ieee80211_sdata_running(sdata))
1612                         continue;
1613                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1614                         /* If an AP vif is found, then disable PS
1615                          * by setting the count to zero thereby setting
1616                          * ps_sdata to NULL.
1617                          */
1618                         count = 0;
1619                         break;
1620                 }
1621                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1622                         continue;
1623                 found = sdata;
1624                 count++;
1625         }
1626
1627         if (count == 1 && ieee80211_powersave_allowed(found)) {
1628                 u8 dtimper = found->u.mgd.dtim_period;
1629
1630                 timeout = local->dynamic_ps_forced_timeout;
1631                 if (timeout < 0)
1632                         timeout = 100;
1633                 local->hw.conf.dynamic_ps_timeout = timeout;
1634
1635                 /* If the TIM IE is invalid, pretend the value is 1 */
1636                 if (!dtimper)
1637                         dtimper = 1;
1638
1639                 local->hw.conf.ps_dtim_period = dtimper;
1640                 local->ps_sdata = found;
1641         } else {
1642                 local->ps_sdata = NULL;
1643         }
1644
1645         ieee80211_change_ps(local);
1646 }
1647
1648 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1649 {
1650         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1651
1652         if (sdata->vif.bss_conf.ps != ps_allowed) {
1653                 sdata->vif.bss_conf.ps = ps_allowed;
1654                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1655         }
1656 }
1657
1658 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1659 {
1660         struct ieee80211_local *local =
1661                 container_of(work, struct ieee80211_local,
1662                              dynamic_ps_disable_work);
1663
1664         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1665                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1666                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1667         }
1668
1669         ieee80211_wake_queues_by_reason(&local->hw,
1670                                         IEEE80211_MAX_QUEUE_MAP,
1671                                         IEEE80211_QUEUE_STOP_REASON_PS,
1672                                         false);
1673 }
1674
1675 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1676 {
1677         struct ieee80211_local *local =
1678                 container_of(work, struct ieee80211_local,
1679                              dynamic_ps_enable_work);
1680         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1681         struct ieee80211_if_managed *ifmgd;
1682         unsigned long flags;
1683         int q;
1684
1685         /* can only happen when PS was just disabled anyway */
1686         if (!sdata)
1687                 return;
1688
1689         ifmgd = &sdata->u.mgd;
1690
1691         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1692                 return;
1693
1694         if (local->hw.conf.dynamic_ps_timeout > 0) {
1695                 /* don't enter PS if TX frames are pending */
1696                 if (drv_tx_frames_pending(local)) {
1697                         mod_timer(&local->dynamic_ps_timer, jiffies +
1698                                   msecs_to_jiffies(
1699                                   local->hw.conf.dynamic_ps_timeout));
1700                         return;
1701                 }
1702
1703                 /*
1704                  * transmission can be stopped by others which leads to
1705                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1706                  * is not the actual idle state.
1707                  */
1708                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1709                 for (q = 0; q < local->hw.queues; q++) {
1710                         if (local->queue_stop_reasons[q]) {
1711                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1712                                                        flags);
1713                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1714                                           msecs_to_jiffies(
1715                                           local->hw.conf.dynamic_ps_timeout));
1716                                 return;
1717                         }
1718                 }
1719                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1720         }
1721
1722         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1723             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1724                 if (drv_tx_frames_pending(local)) {
1725                         mod_timer(&local->dynamic_ps_timer, jiffies +
1726                                   msecs_to_jiffies(
1727                                   local->hw.conf.dynamic_ps_timeout));
1728                 } else {
1729                         ieee80211_send_nullfunc(local, sdata, true);
1730                         /* Flush to get the tx status of nullfunc frame */
1731                         ieee80211_flush_queues(local, sdata, false);
1732                 }
1733         }
1734
1735         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1736               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1737             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1738                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1739                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1740                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1741         }
1742 }
1743
1744 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1745 {
1746         struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1747
1748         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1749 }
1750
1751 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1752 {
1753         struct delayed_work *delayed_work = to_delayed_work(work);
1754         struct ieee80211_sub_if_data *sdata =
1755                 container_of(delayed_work, struct ieee80211_sub_if_data,
1756                              dfs_cac_timer_work);
1757         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1758
1759         mutex_lock(&sdata->local->mtx);
1760         if (sdata->wdev.cac_started) {
1761                 ieee80211_vif_release_channel(sdata);
1762                 cfg80211_cac_event(sdata->dev, &chandef,
1763                                    NL80211_RADAR_CAC_FINISHED,
1764                                    GFP_KERNEL);
1765         }
1766         mutex_unlock(&sdata->local->mtx);
1767 }
1768
1769 static bool
1770 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1771 {
1772         struct ieee80211_local *local = sdata->local;
1773         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1774         bool ret = false;
1775         int ac;
1776
1777         if (local->hw.queues < IEEE80211_NUM_ACS)
1778                 return false;
1779
1780         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1781                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1782                 int non_acm_ac;
1783                 unsigned long now = jiffies;
1784
1785                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1786                     tx_tspec->admitted_time &&
1787                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1788                         tx_tspec->consumed_tx_time = 0;
1789                         tx_tspec->time_slice_start = now;
1790
1791                         if (tx_tspec->downgraded)
1792                                 tx_tspec->action =
1793                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1794                 }
1795
1796                 switch (tx_tspec->action) {
1797                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1798                         /* take the original parameters */
1799                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1800                                 sdata_err(sdata,
1801                                           "failed to set TX queue parameters for queue %d\n",
1802                                           ac);
1803                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1804                         tx_tspec->downgraded = false;
1805                         ret = true;
1806                         break;
1807                 case TX_TSPEC_ACTION_DOWNGRADE:
1808                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1809                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1810                                 ret = true;
1811                                 break;
1812                         }
1813                         /* downgrade next lower non-ACM AC */
1814                         for (non_acm_ac = ac + 1;
1815                              non_acm_ac < IEEE80211_NUM_ACS;
1816                              non_acm_ac++)
1817                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1818                                         break;
1819                         /* Usually the loop will result in using BK even if it
1820                          * requires admission control, but such a configuration
1821                          * makes no sense and we have to transmit somehow - the
1822                          * AC selection does the same thing.
1823                          * If we started out trying to downgrade from BK, then
1824                          * the extra condition here might be needed.
1825                          */
1826                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1827                                 non_acm_ac = IEEE80211_AC_BK;
1828                         if (drv_conf_tx(local, sdata, ac,
1829                                         &sdata->tx_conf[non_acm_ac]))
1830                                 sdata_err(sdata,
1831                                           "failed to set TX queue parameters for queue %d\n",
1832                                           ac);
1833                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1834                         ret = true;
1835                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1836                                 tx_tspec->time_slice_start + HZ - now + 1);
1837                         break;
1838                 case TX_TSPEC_ACTION_NONE:
1839                         /* nothing now */
1840                         break;
1841                 }
1842         }
1843
1844         return ret;
1845 }
1846
1847 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1848 {
1849         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1850                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1851 }
1852
1853 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1854 {
1855         struct ieee80211_sub_if_data *sdata;
1856
1857         sdata = container_of(work, struct ieee80211_sub_if_data,
1858                              u.mgd.tx_tspec_wk.work);
1859         ieee80211_sta_handle_tspec_ac_params(sdata);
1860 }
1861
1862 /* MLME */
1863 static bool
1864 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1865                          struct ieee80211_sub_if_data *sdata,
1866                          const u8 *wmm_param, size_t wmm_param_len,
1867                          const struct ieee80211_mu_edca_param_set *mu_edca)
1868 {
1869         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1870         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1871         size_t left;
1872         int count, ac;
1873         const u8 *pos;
1874         u8 uapsd_queues = 0;
1875
1876         if (!local->ops->conf_tx)
1877                 return false;
1878
1879         if (local->hw.queues < IEEE80211_NUM_ACS)
1880                 return false;
1881
1882         if (!wmm_param)
1883                 return false;
1884
1885         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1886                 return false;
1887
1888         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1889                 uapsd_queues = ifmgd->uapsd_queues;
1890
1891         count = wmm_param[6] & 0x0f;
1892         if (count == ifmgd->wmm_last_param_set)
1893                 return false;
1894         ifmgd->wmm_last_param_set = count;
1895
1896         pos = wmm_param + 8;
1897         left = wmm_param_len - 8;
1898
1899         memset(&params, 0, sizeof(params));
1900
1901         sdata->wmm_acm = 0;
1902         for (; left >= 4; left -= 4, pos += 4) {
1903                 int aci = (pos[0] >> 5) & 0x03;
1904                 int acm = (pos[0] >> 4) & 0x01;
1905                 bool uapsd = false;
1906
1907                 switch (aci) {
1908                 case 1: /* AC_BK */
1909                         ac = IEEE80211_AC_BK;
1910                         if (acm)
1911                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1912                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1913                                 uapsd = true;
1914                         params[ac].mu_edca = !!mu_edca;
1915                         if (mu_edca)
1916                                 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
1917                         break;
1918                 case 2: /* AC_VI */
1919                         ac = IEEE80211_AC_VI;
1920                         if (acm)
1921                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1922                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1923                                 uapsd = true;
1924                         params[ac].mu_edca = !!mu_edca;
1925                         if (mu_edca)
1926                                 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
1927                         break;
1928                 case 3: /* AC_VO */
1929                         ac = IEEE80211_AC_VO;
1930                         if (acm)
1931                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1932                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1933                                 uapsd = true;
1934                         params[ac].mu_edca = !!mu_edca;
1935                         if (mu_edca)
1936                                 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
1937                         break;
1938                 case 0: /* AC_BE */
1939                 default:
1940                         ac = IEEE80211_AC_BE;
1941                         if (acm)
1942                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1943                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1944                                 uapsd = true;
1945                         params[ac].mu_edca = !!mu_edca;
1946                         if (mu_edca)
1947                                 params[ac].mu_edca_param_rec = mu_edca->ac_be;
1948                         break;
1949                 }
1950
1951                 params[ac].aifs = pos[0] & 0x0f;
1952
1953                 if (params[ac].aifs < 2) {
1954                         sdata_info(sdata,
1955                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1956                                    params[ac].aifs, aci);
1957                         params[ac].aifs = 2;
1958                 }
1959                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1960                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1961                 params[ac].txop = get_unaligned_le16(pos + 2);
1962                 params[ac].acm = acm;
1963                 params[ac].uapsd = uapsd;
1964
1965                 if (params[ac].cw_min == 0 ||
1966                     params[ac].cw_min > params[ac].cw_max) {
1967                         sdata_info(sdata,
1968                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1969                                    params[ac].cw_min, params[ac].cw_max, aci);
1970                         return false;
1971                 }
1972                 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
1973         }
1974
1975         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1976                 mlme_dbg(sdata,
1977                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1978                          ac, params[ac].acm,
1979                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1980                          params[ac].txop, params[ac].uapsd,
1981                          ifmgd->tx_tspec[ac].downgraded);
1982                 sdata->tx_conf[ac] = params[ac];
1983                 if (!ifmgd->tx_tspec[ac].downgraded &&
1984                     drv_conf_tx(local, sdata, ac, &params[ac]))
1985                         sdata_err(sdata,
1986                                   "failed to set TX queue parameters for AC %d\n",
1987                                   ac);
1988         }
1989
1990         /* enable WMM or activate new settings */
1991         sdata->vif.bss_conf.qos = true;
1992         return true;
1993 }
1994
1995 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1996 {
1997         lockdep_assert_held(&sdata->local->mtx);
1998
1999         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2000         ieee80211_run_deferred_scan(sdata->local);
2001 }
2002
2003 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2004 {
2005         mutex_lock(&sdata->local->mtx);
2006         __ieee80211_stop_poll(sdata);
2007         mutex_unlock(&sdata->local->mtx);
2008 }
2009
2010 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2011                                            u16 capab, bool erp_valid, u8 erp)
2012 {
2013         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2014         struct ieee80211_supported_band *sband;
2015         u32 changed = 0;
2016         bool use_protection;
2017         bool use_short_preamble;
2018         bool use_short_slot;
2019
2020         sband = ieee80211_get_sband(sdata);
2021         if (!sband)
2022                 return changed;
2023
2024         if (erp_valid) {
2025                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2026                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2027         } else {
2028                 use_protection = false;
2029                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2030         }
2031
2032         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2033         if (sband->band == NL80211_BAND_5GHZ)
2034                 use_short_slot = true;
2035
2036         if (use_protection != bss_conf->use_cts_prot) {
2037                 bss_conf->use_cts_prot = use_protection;
2038                 changed |= BSS_CHANGED_ERP_CTS_PROT;
2039         }
2040
2041         if (use_short_preamble != bss_conf->use_short_preamble) {
2042                 bss_conf->use_short_preamble = use_short_preamble;
2043                 changed |= BSS_CHANGED_ERP_PREAMBLE;
2044         }
2045
2046         if (use_short_slot != bss_conf->use_short_slot) {
2047                 bss_conf->use_short_slot = use_short_slot;
2048                 changed |= BSS_CHANGED_ERP_SLOT;
2049         }
2050
2051         return changed;
2052 }
2053
2054 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2055                                      struct cfg80211_bss *cbss,
2056                                      u32 bss_info_changed)
2057 {
2058         struct ieee80211_bss *bss = (void *)cbss->priv;
2059         struct ieee80211_local *local = sdata->local;
2060         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2061
2062         bss_info_changed |= BSS_CHANGED_ASSOC;
2063         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2064                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2065
2066         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2067                 beacon_loss_count * bss_conf->beacon_int));
2068
2069         sdata->u.mgd.associated = cbss;
2070         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2071
2072         ieee80211_check_rate_mask(sdata);
2073
2074         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2075
2076         if (sdata->vif.p2p ||
2077             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2078                 const struct cfg80211_bss_ies *ies;
2079
2080                 rcu_read_lock();
2081                 ies = rcu_dereference(cbss->ies);
2082                 if (ies) {
2083                         int ret;
2084
2085                         ret = cfg80211_get_p2p_attr(
2086                                         ies->data, ies->len,
2087                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2088                                         (u8 *) &bss_conf->p2p_noa_attr,
2089                                         sizeof(bss_conf->p2p_noa_attr));
2090                         if (ret >= 2) {
2091                                 sdata->u.mgd.p2p_noa_index =
2092                                         bss_conf->p2p_noa_attr.index;
2093                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
2094                         }
2095                 }
2096                 rcu_read_unlock();
2097         }
2098
2099         /* just to be sure */
2100         ieee80211_stop_poll(sdata);
2101
2102         ieee80211_led_assoc(local, 1);
2103
2104         if (sdata->u.mgd.have_beacon) {
2105                 /*
2106                  * If the AP is buggy we may get here with no DTIM period
2107                  * known, so assume it's 1 which is the only safe assumption
2108                  * in that case, although if the TIM IE is broken powersave
2109                  * probably just won't work at all.
2110                  */
2111                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2112                 bss_conf->beacon_rate = bss->beacon_rate;
2113                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2114         } else {
2115                 bss_conf->beacon_rate = NULL;
2116                 bss_conf->dtim_period = 0;
2117         }
2118
2119         bss_conf->assoc = 1;
2120
2121         /* Tell the driver to monitor connection quality (if supported) */
2122         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2123             bss_conf->cqm_rssi_thold)
2124                 bss_info_changed |= BSS_CHANGED_CQM;
2125
2126         /* Enable ARP filtering */
2127         if (bss_conf->arp_addr_cnt)
2128                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2129
2130         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2131
2132         mutex_lock(&local->iflist_mtx);
2133         ieee80211_recalc_ps(local);
2134         mutex_unlock(&local->iflist_mtx);
2135
2136         ieee80211_recalc_smps(sdata);
2137         ieee80211_recalc_ps_vif(sdata);
2138
2139         netif_carrier_on(sdata->dev);
2140 }
2141
2142 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2143                                    u16 stype, u16 reason, bool tx,
2144                                    u8 *frame_buf)
2145 {
2146         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2147         struct ieee80211_local *local = sdata->local;
2148         u32 changed = 0;
2149
2150         sdata_assert_lock(sdata);
2151
2152         if (WARN_ON_ONCE(tx && !frame_buf))
2153                 return;
2154
2155         if (WARN_ON(!ifmgd->associated))
2156                 return;
2157
2158         ieee80211_stop_poll(sdata);
2159
2160         ifmgd->associated = NULL;
2161         netif_carrier_off(sdata->dev);
2162
2163         /*
2164          * if we want to get out of ps before disassoc (why?) we have
2165          * to do it before sending disassoc, as otherwise the null-packet
2166          * won't be valid.
2167          */
2168         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2169                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2170                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2171         }
2172         local->ps_sdata = NULL;
2173
2174         /* disable per-vif ps */
2175         ieee80211_recalc_ps_vif(sdata);
2176
2177         /* make sure ongoing transmission finishes */
2178         synchronize_net();
2179
2180         /*
2181          * drop any frame before deauth/disassoc, this can be data or
2182          * management frame. Since we are disconnecting, we should not
2183          * insist sending these frames which can take time and delay
2184          * the disconnection and possible the roaming.
2185          */
2186         if (tx)
2187                 ieee80211_flush_queues(local, sdata, true);
2188
2189         /* deauthenticate/disassociate now */
2190         if (tx || frame_buf) {
2191                 /*
2192                  * In multi channel scenarios guarantee that the virtual
2193                  * interface is granted immediate airtime to transmit the
2194                  * deauthentication frame by calling mgd_prepare_tx, if the
2195                  * driver requested so.
2196                  */
2197                 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2198                     !ifmgd->have_beacon)
2199                         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2200
2201                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2202                                                reason, tx, frame_buf);
2203         }
2204
2205         /* flush out frame - make sure the deauth was actually sent */
2206         if (tx)
2207                 ieee80211_flush_queues(local, sdata, false);
2208
2209         /* clear bssid only after building the needed mgmt frames */
2210         eth_zero_addr(ifmgd->bssid);
2211
2212         /* remove AP and TDLS peers */
2213         sta_info_flush(sdata);
2214
2215         /* finally reset all BSS / config parameters */
2216         changed |= ieee80211_reset_erp_info(sdata);
2217
2218         ieee80211_led_assoc(local, 0);
2219         changed |= BSS_CHANGED_ASSOC;
2220         sdata->vif.bss_conf.assoc = false;
2221
2222         ifmgd->p2p_noa_index = -1;
2223         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2224                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2225
2226         /* on the next assoc, re-program HT/VHT parameters */
2227         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2228         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2229         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2230         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2231
2232         /* reset MU-MIMO ownership and group data */
2233         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2234                sizeof(sdata->vif.bss_conf.mu_group.membership));
2235         memset(sdata->vif.bss_conf.mu_group.position, 0,
2236                sizeof(sdata->vif.bss_conf.mu_group.position));
2237         changed |= BSS_CHANGED_MU_GROUPS;
2238         sdata->vif.mu_mimo_owner = false;
2239
2240         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2241
2242         del_timer_sync(&local->dynamic_ps_timer);
2243         cancel_work_sync(&local->dynamic_ps_enable_work);
2244
2245         /* Disable ARP filtering */
2246         if (sdata->vif.bss_conf.arp_addr_cnt)
2247                 changed |= BSS_CHANGED_ARP_FILTER;
2248
2249         sdata->vif.bss_conf.qos = false;
2250         changed |= BSS_CHANGED_QOS;
2251
2252         /* The BSSID (not really interesting) and HT changed */
2253         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2254         ieee80211_bss_info_change_notify(sdata, changed);
2255
2256         /* disassociated - set to defaults now */
2257         ieee80211_set_wmm_default(sdata, false, false);
2258
2259         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2260         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2261         del_timer_sync(&sdata->u.mgd.timer);
2262         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2263
2264         sdata->vif.bss_conf.dtim_period = 0;
2265         sdata->vif.bss_conf.beacon_rate = NULL;
2266
2267         ifmgd->have_beacon = false;
2268
2269         ifmgd->flags = 0;
2270         mutex_lock(&local->mtx);
2271         ieee80211_vif_release_channel(sdata);
2272
2273         sdata->vif.csa_active = false;
2274         ifmgd->csa_waiting_bcn = false;
2275         ifmgd->csa_ignored_same_chan = false;
2276         if (sdata->csa_block_tx) {
2277                 ieee80211_wake_vif_queues(local, sdata,
2278                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2279                 sdata->csa_block_tx = false;
2280         }
2281         mutex_unlock(&local->mtx);
2282
2283         /* existing TX TSPEC sessions no longer exist */
2284         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2285         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2286
2287         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2288 }
2289
2290 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2291                              struct ieee80211_hdr *hdr)
2292 {
2293         /*
2294          * We can postpone the mgd.timer whenever receiving unicast frames
2295          * from AP because we know that the connection is working both ways
2296          * at that time. But multicast frames (and hence also beacons) must
2297          * be ignored here, because we need to trigger the timer during
2298          * data idle periods for sending the periodic probe request to the
2299          * AP we're connected to.
2300          */
2301         if (is_multicast_ether_addr(hdr->addr1))
2302                 return;
2303
2304         ieee80211_sta_reset_conn_monitor(sdata);
2305 }
2306
2307 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2308 {
2309         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2310         struct ieee80211_local *local = sdata->local;
2311
2312         mutex_lock(&local->mtx);
2313         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2314                 goto out;
2315
2316         __ieee80211_stop_poll(sdata);
2317
2318         mutex_lock(&local->iflist_mtx);
2319         ieee80211_recalc_ps(local);
2320         mutex_unlock(&local->iflist_mtx);
2321
2322         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2323                 goto out;
2324
2325         /*
2326          * We've received a probe response, but are not sure whether
2327          * we have or will be receiving any beacons or data, so let's
2328          * schedule the timers again, just in case.
2329          */
2330         ieee80211_sta_reset_beacon_monitor(sdata);
2331
2332         mod_timer(&ifmgd->conn_mon_timer,
2333                   round_jiffies_up(jiffies +
2334                                    IEEE80211_CONNECTION_IDLE_TIME));
2335 out:
2336         mutex_unlock(&local->mtx);
2337 }
2338
2339 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2340                                            struct ieee80211_hdr *hdr,
2341                                            u16 tx_time)
2342 {
2343         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2344         u16 tid = ieee80211_get_tid(hdr);
2345         int ac = ieee80211_ac_from_tid(tid);
2346         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2347         unsigned long now = jiffies;
2348
2349         if (likely(!tx_tspec->admitted_time))
2350                 return;
2351
2352         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2353                 tx_tspec->consumed_tx_time = 0;
2354                 tx_tspec->time_slice_start = now;
2355
2356                 if (tx_tspec->downgraded) {
2357                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2358                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2359                 }
2360         }
2361
2362         if (tx_tspec->downgraded)
2363                 return;
2364
2365         tx_tspec->consumed_tx_time += tx_time;
2366
2367         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2368                 tx_tspec->downgraded = true;
2369                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2370                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2371         }
2372 }
2373
2374 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2375                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2376 {
2377         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2378
2379         if (!ieee80211_is_data(hdr->frame_control))
2380             return;
2381
2382         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2383             sdata->u.mgd.probe_send_count > 0) {
2384                 if (ack)
2385                         ieee80211_sta_reset_conn_monitor(sdata);
2386                 else
2387                         sdata->u.mgd.nullfunc_failed = true;
2388                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2389                 return;
2390         }
2391
2392         if (ack)
2393                 ieee80211_sta_reset_conn_monitor(sdata);
2394 }
2395
2396 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2397                                           const u8 *src, const u8 *dst,
2398                                           const u8 *ssid, size_t ssid_len,
2399                                           struct ieee80211_channel *channel)
2400 {
2401         struct sk_buff *skb;
2402
2403         skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2404                                         ssid, ssid_len, NULL, 0,
2405                                         IEEE80211_PROBE_FLAG_DIRECTED);
2406         if (skb)
2407                 ieee80211_tx_skb(sdata, skb);
2408 }
2409
2410 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2411 {
2412         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2413         const u8 *ssid;
2414         u8 *dst = ifmgd->associated->bssid;
2415         u8 unicast_limit = max(1, max_probe_tries - 3);
2416         struct sta_info *sta;
2417
2418         /*
2419          * Try sending broadcast probe requests for the last three
2420          * probe requests after the first ones failed since some
2421          * buggy APs only support broadcast probe requests.
2422          */
2423         if (ifmgd->probe_send_count >= unicast_limit)
2424                 dst = NULL;
2425
2426         /*
2427          * When the hardware reports an accurate Tx ACK status, it's
2428          * better to send a nullfunc frame instead of a probe request,
2429          * as it will kick us off the AP quickly if we aren't associated
2430          * anymore. The timeout will be reset if the frame is ACKed by
2431          * the AP.
2432          */
2433         ifmgd->probe_send_count++;
2434
2435         if (dst) {
2436                 mutex_lock(&sdata->local->sta_mtx);
2437                 sta = sta_info_get(sdata, dst);
2438                 if (!WARN_ON(!sta))
2439                         ieee80211_check_fast_rx(sta);
2440                 mutex_unlock(&sdata->local->sta_mtx);
2441         }
2442
2443         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2444                 ifmgd->nullfunc_failed = false;
2445                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2446         } else {
2447                 int ssid_len;
2448
2449                 rcu_read_lock();
2450                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2451                 if (WARN_ON_ONCE(ssid == NULL))
2452                         ssid_len = 0;
2453                 else
2454                         ssid_len = ssid[1];
2455
2456                 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2457                                               ssid + 2, ssid_len,
2458                                               ifmgd->associated->channel);
2459                 rcu_read_unlock();
2460         }
2461
2462         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2463         run_again(sdata, ifmgd->probe_timeout);
2464 }
2465
2466 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2467                                    bool beacon)
2468 {
2469         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2470         bool already = false;
2471
2472         if (!ieee80211_sdata_running(sdata))
2473                 return;
2474
2475         sdata_lock(sdata);
2476
2477         if (!ifmgd->associated)
2478                 goto out;
2479
2480         mutex_lock(&sdata->local->mtx);
2481
2482         if (sdata->local->tmp_channel || sdata->local->scanning) {
2483                 mutex_unlock(&sdata->local->mtx);
2484                 goto out;
2485         }
2486
2487         if (beacon) {
2488                 mlme_dbg_ratelimited(sdata,
2489                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2490                                      beacon_loss_count);
2491
2492                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2493         }
2494
2495         /*
2496          * The driver/our work has already reported this event or the
2497          * connection monitoring has kicked in and we have already sent
2498          * a probe request. Or maybe the AP died and the driver keeps
2499          * reporting until we disassociate...
2500          *
2501          * In either case we have to ignore the current call to this
2502          * function (except for setting the correct probe reason bit)
2503          * because otherwise we would reset the timer every time and
2504          * never check whether we received a probe response!
2505          */
2506         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2507                 already = true;
2508
2509         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2510
2511         mutex_unlock(&sdata->local->mtx);
2512
2513         if (already)
2514                 goto out;
2515
2516         mutex_lock(&sdata->local->iflist_mtx);
2517         ieee80211_recalc_ps(sdata->local);
2518         mutex_unlock(&sdata->local->iflist_mtx);
2519
2520         ifmgd->probe_send_count = 0;
2521         ieee80211_mgd_probe_ap_send(sdata);
2522  out:
2523         sdata_unlock(sdata);
2524 }
2525
2526 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2527                                           struct ieee80211_vif *vif)
2528 {
2529         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2530         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2531         struct cfg80211_bss *cbss;
2532         struct sk_buff *skb;
2533         const u8 *ssid;
2534         int ssid_len;
2535
2536         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2537                 return NULL;
2538
2539         sdata_assert_lock(sdata);
2540
2541         if (ifmgd->associated)
2542                 cbss = ifmgd->associated;
2543         else if (ifmgd->auth_data)
2544                 cbss = ifmgd->auth_data->bss;
2545         else if (ifmgd->assoc_data)
2546                 cbss = ifmgd->assoc_data->bss;
2547         else
2548                 return NULL;
2549
2550         rcu_read_lock();
2551         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2552         if (WARN_ON_ONCE(ssid == NULL))
2553                 ssid_len = 0;
2554         else
2555                 ssid_len = ssid[1];
2556
2557         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2558                                         (u32) -1, cbss->channel,
2559                                         ssid + 2, ssid_len,
2560                                         NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2561         rcu_read_unlock();
2562
2563         return skb;
2564 }
2565 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2566
2567 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2568                                         const u8 *buf, size_t len, bool tx,
2569                                         u16 reason)
2570 {
2571         struct ieee80211_event event = {
2572                 .type = MLME_EVENT,
2573                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2574                 .u.mlme.reason = reason,
2575         };
2576
2577         if (tx)
2578                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2579         else
2580                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2581
2582         drv_event_callback(sdata->local, sdata, &event);
2583 }
2584
2585 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2586 {
2587         struct ieee80211_local *local = sdata->local;
2588         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2589         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2590         bool tx;
2591
2592         sdata_lock(sdata);
2593         if (!ifmgd->associated) {
2594                 sdata_unlock(sdata);
2595                 return;
2596         }
2597
2598         tx = !sdata->csa_block_tx;
2599
2600         /* AP is probably out of range (or not reachable for another reason) so
2601          * remove the bss struct for that AP.
2602          */
2603         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2604
2605         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2606                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2607                                tx, frame_buf);
2608         mutex_lock(&local->mtx);
2609         sdata->vif.csa_active = false;
2610         ifmgd->csa_waiting_bcn = false;
2611         if (sdata->csa_block_tx) {
2612                 ieee80211_wake_vif_queues(local, sdata,
2613                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2614                 sdata->csa_block_tx = false;
2615         }
2616         mutex_unlock(&local->mtx);
2617
2618         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2619                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2620
2621         sdata_unlock(sdata);
2622 }
2623
2624 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2625 {
2626         struct ieee80211_sub_if_data *sdata =
2627                 container_of(work, struct ieee80211_sub_if_data,
2628                              u.mgd.beacon_connection_loss_work);
2629         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2630
2631         if (ifmgd->associated)
2632                 ifmgd->beacon_loss_count++;
2633
2634         if (ifmgd->connection_loss) {
2635                 sdata_info(sdata, "Connection to AP %pM lost\n",
2636                            ifmgd->bssid);
2637                 __ieee80211_disconnect(sdata);
2638         } else {
2639                 ieee80211_mgd_probe_ap(sdata, true);
2640         }
2641 }
2642
2643 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2644 {
2645         struct ieee80211_sub_if_data *sdata =
2646                 container_of(work, struct ieee80211_sub_if_data,
2647                              u.mgd.csa_connection_drop_work);
2648
2649         __ieee80211_disconnect(sdata);
2650 }
2651
2652 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2653 {
2654         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2655         struct ieee80211_hw *hw = &sdata->local->hw;
2656
2657         trace_api_beacon_loss(sdata);
2658
2659         sdata->u.mgd.connection_loss = false;
2660         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2661 }
2662 EXPORT_SYMBOL(ieee80211_beacon_loss);
2663
2664 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2665 {
2666         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2667         struct ieee80211_hw *hw = &sdata->local->hw;
2668
2669         trace_api_connection_loss(sdata);
2670
2671         sdata->u.mgd.connection_loss = true;
2672         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2673 }
2674 EXPORT_SYMBOL(ieee80211_connection_loss);
2675
2676
2677 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2678                                         bool assoc)
2679 {
2680         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2681
2682         sdata_assert_lock(sdata);
2683
2684         if (!assoc) {
2685                 /*
2686                  * we are not authenticated yet, the only timer that could be
2687                  * running is the timeout for the authentication response which
2688                  * which is not relevant anymore.
2689                  */
2690                 del_timer_sync(&sdata->u.mgd.timer);
2691                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2692
2693                 eth_zero_addr(sdata->u.mgd.bssid);
2694                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2695                 sdata->u.mgd.flags = 0;
2696                 mutex_lock(&sdata->local->mtx);
2697                 ieee80211_vif_release_channel(sdata);
2698                 mutex_unlock(&sdata->local->mtx);
2699         }
2700
2701         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2702         kfree(auth_data);
2703         sdata->u.mgd.auth_data = NULL;
2704 }
2705
2706 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2707                                          bool assoc, bool abandon)
2708 {
2709         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2710
2711         sdata_assert_lock(sdata);
2712
2713         if (!assoc) {
2714                 /*
2715                  * we are not associated yet, the only timer that could be
2716                  * running is the timeout for the association response which
2717                  * which is not relevant anymore.
2718                  */
2719                 del_timer_sync(&sdata->u.mgd.timer);
2720                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2721
2722                 eth_zero_addr(sdata->u.mgd.bssid);
2723                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2724                 sdata->u.mgd.flags = 0;
2725                 sdata->vif.mu_mimo_owner = false;
2726
2727                 mutex_lock(&sdata->local->mtx);
2728                 ieee80211_vif_release_channel(sdata);
2729                 mutex_unlock(&sdata->local->mtx);
2730
2731                 if (abandon)
2732                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2733         }
2734
2735         kfree(assoc_data);
2736         sdata->u.mgd.assoc_data = NULL;
2737 }
2738
2739 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2740                                      struct ieee80211_mgmt *mgmt, size_t len)
2741 {
2742         struct ieee80211_local *local = sdata->local;
2743         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2744         u8 *pos;
2745         struct ieee802_11_elems elems;
2746         u32 tx_flags = 0;
2747
2748         pos = mgmt->u.auth.variable;
2749         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2750         if (!elems.challenge)
2751                 return;
2752         auth_data->expected_transaction = 4;
2753         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2754         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2755                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2756                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2757         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2758                             elems.challenge - 2, elems.challenge_len + 2,
2759                             auth_data->bss->bssid, auth_data->bss->bssid,
2760                             auth_data->key, auth_data->key_len,
2761                             auth_data->key_idx, tx_flags);
2762 }
2763
2764 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2765                                     const u8 *bssid)
2766 {
2767         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2768         struct sta_info *sta;
2769
2770         sdata_info(sdata, "authenticated\n");
2771         ifmgd->auth_data->done = true;
2772         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2773         ifmgd->auth_data->timeout_started = true;
2774         run_again(sdata, ifmgd->auth_data->timeout);
2775
2776         /* move station state to auth */
2777         mutex_lock(&sdata->local->sta_mtx);
2778         sta = sta_info_get(sdata, bssid);
2779         if (!sta) {
2780                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2781                 return false;
2782         }
2783         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2784                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2785                 return false;
2786         }
2787         mutex_unlock(&sdata->local->sta_mtx);
2788
2789         return true;
2790 }
2791
2792 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2793                                    struct ieee80211_mgmt *mgmt, size_t len)
2794 {
2795         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2796         u8 bssid[ETH_ALEN];
2797         u16 auth_alg, auth_transaction, status_code;
2798         struct ieee80211_event event = {
2799                 .type = MLME_EVENT,
2800                 .u.mlme.data = AUTH_EVENT,
2801         };
2802
2803         sdata_assert_lock(sdata);
2804
2805         if (len < 24 + 6)
2806                 return;
2807
2808         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2809                 return;
2810
2811         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2812
2813         if (!ether_addr_equal(bssid, mgmt->bssid))
2814                 return;
2815
2816         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2817         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2818         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2819
2820         if (auth_alg != ifmgd->auth_data->algorithm ||
2821             (auth_alg != WLAN_AUTH_SAE &&
2822              auth_transaction != ifmgd->auth_data->expected_transaction) ||
2823             (auth_alg == WLAN_AUTH_SAE &&
2824              (auth_transaction < ifmgd->auth_data->expected_transaction ||
2825               auth_transaction > 2))) {
2826                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2827                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2828                            auth_transaction,
2829                            ifmgd->auth_data->expected_transaction);
2830                 return;
2831         }
2832
2833         if (status_code != WLAN_STATUS_SUCCESS) {
2834                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2835                            mgmt->sa, status_code);
2836                 ieee80211_destroy_auth_data(sdata, false);
2837                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2838                 event.u.mlme.status = MLME_DENIED;
2839                 event.u.mlme.reason = status_code;
2840                 drv_event_callback(sdata->local, sdata, &event);
2841                 return;
2842         }
2843
2844         switch (ifmgd->auth_data->algorithm) {
2845         case WLAN_AUTH_OPEN:
2846         case WLAN_AUTH_LEAP:
2847         case WLAN_AUTH_FT:
2848         case WLAN_AUTH_SAE:
2849         case WLAN_AUTH_FILS_SK:
2850         case WLAN_AUTH_FILS_SK_PFS:
2851         case WLAN_AUTH_FILS_PK:
2852                 break;
2853         case WLAN_AUTH_SHARED_KEY:
2854                 if (ifmgd->auth_data->expected_transaction != 4) {
2855                         ieee80211_auth_challenge(sdata, mgmt, len);
2856                         /* need another frame */
2857                         return;
2858                 }
2859                 break;
2860         default:
2861                 WARN_ONCE(1, "invalid auth alg %d",
2862                           ifmgd->auth_data->algorithm);
2863                 return;
2864         }
2865
2866         event.u.mlme.status = MLME_SUCCESS;
2867         drv_event_callback(sdata->local, sdata, &event);
2868         if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
2869             (auth_transaction == 2 &&
2870              ifmgd->auth_data->expected_transaction == 2)) {
2871                 if (!ieee80211_mark_sta_auth(sdata, bssid))
2872                         goto out_err;
2873         } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2874                    auth_transaction == 2) {
2875                 sdata_info(sdata, "SAE peer confirmed\n");
2876                 ifmgd->auth_data->peer_confirmed = true;
2877         }
2878
2879         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2880         return;
2881  out_err:
2882         mutex_unlock(&sdata->local->sta_mtx);
2883         /* ignore frame -- wait for timeout */
2884 }
2885
2886 #define case_WLAN(type) \
2887         case WLAN_REASON_##type: return #type
2888
2889 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2890 {
2891         switch (reason_code) {
2892         case_WLAN(UNSPECIFIED);
2893         case_WLAN(PREV_AUTH_NOT_VALID);
2894         case_WLAN(DEAUTH_LEAVING);
2895         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2896         case_WLAN(DISASSOC_AP_BUSY);
2897         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2898         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2899         case_WLAN(DISASSOC_STA_HAS_LEFT);
2900         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2901         case_WLAN(DISASSOC_BAD_POWER);
2902         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2903         case_WLAN(INVALID_IE);
2904         case_WLAN(MIC_FAILURE);
2905         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2906         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2907         case_WLAN(IE_DIFFERENT);
2908         case_WLAN(INVALID_GROUP_CIPHER);
2909         case_WLAN(INVALID_PAIRWISE_CIPHER);
2910         case_WLAN(INVALID_AKMP);
2911         case_WLAN(UNSUPP_RSN_VERSION);
2912         case_WLAN(INVALID_RSN_IE_CAP);
2913         case_WLAN(IEEE8021X_FAILED);
2914         case_WLAN(CIPHER_SUITE_REJECTED);
2915         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2916         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2917         case_WLAN(DISASSOC_LOW_ACK);
2918         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2919         case_WLAN(QSTA_LEAVE_QBSS);
2920         case_WLAN(QSTA_NOT_USE);
2921         case_WLAN(QSTA_REQUIRE_SETUP);
2922         case_WLAN(QSTA_TIMEOUT);
2923         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2924         case_WLAN(MESH_PEER_CANCELED);
2925         case_WLAN(MESH_MAX_PEERS);
2926         case_WLAN(MESH_CONFIG);
2927         case_WLAN(MESH_CLOSE);
2928         case_WLAN(MESH_MAX_RETRIES);
2929         case_WLAN(MESH_CONFIRM_TIMEOUT);
2930         case_WLAN(MESH_INVALID_GTK);
2931         case_WLAN(MESH_INCONSISTENT_PARAM);
2932         case_WLAN(MESH_INVALID_SECURITY);
2933         case_WLAN(MESH_PATH_ERROR);
2934         case_WLAN(MESH_PATH_NOFORWARD);
2935         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2936         case_WLAN(MAC_EXISTS_IN_MBSS);
2937         case_WLAN(MESH_CHAN_REGULATORY);
2938         case_WLAN(MESH_CHAN);
2939         default: return "<unknown>";
2940         }
2941 }
2942
2943 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2944                                      struct ieee80211_mgmt *mgmt, size_t len)
2945 {
2946         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2947         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2948
2949         sdata_assert_lock(sdata);
2950
2951         if (len < 24 + 2)
2952                 return;
2953
2954         if (ifmgd->associated &&
2955             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2956                 const u8 *bssid = ifmgd->associated->bssid;
2957
2958                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2959                            bssid, reason_code,
2960                            ieee80211_get_reason_code_string(reason_code));
2961
2962                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2963
2964                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2965                                             reason_code);
2966                 return;
2967         }
2968
2969         if (ifmgd->assoc_data &&
2970             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2971                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2972
2973                 sdata_info(sdata,
2974                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2975                            bssid, reason_code,
2976                            ieee80211_get_reason_code_string(reason_code));
2977
2978                 ieee80211_destroy_assoc_data(sdata, false, true);
2979
2980                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2981                 return;
2982         }
2983 }
2984
2985
2986 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2987                                        struct ieee80211_mgmt *mgmt, size_t len)
2988 {
2989         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2990         u16 reason_code;
2991
2992         sdata_assert_lock(sdata);
2993
2994         if (len < 24 + 2)
2995                 return;
2996
2997         if (!ifmgd->associated ||
2998             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2999                 return;
3000
3001         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3002
3003         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3004                    mgmt->sa, reason_code,
3005                    ieee80211_get_reason_code_string(reason_code));
3006
3007         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3008
3009         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3010 }
3011
3012 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3013                                 u8 *supp_rates, unsigned int supp_rates_len,
3014                                 u32 *rates, u32 *basic_rates,
3015                                 bool *have_higher_than_11mbit,
3016                                 int *min_rate, int *min_rate_index,
3017                                 int shift)
3018 {
3019         int i, j;
3020
3021         for (i = 0; i < supp_rates_len; i++) {
3022                 int rate = supp_rates[i] & 0x7f;
3023                 bool is_basic = !!(supp_rates[i] & 0x80);
3024
3025                 if ((rate * 5 * (1 << shift)) > 110)
3026                         *have_higher_than_11mbit = true;
3027
3028                 /*
3029                  * Skip HT and VHT BSS membership selectors since they're not
3030                  * rates.
3031                  *
3032                  * Note: Even though the membership selector and the basic
3033                  *       rate flag share the same bit, they are not exactly
3034                  *       the same.
3035                  */
3036                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3037                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3038                         continue;
3039
3040                 for (j = 0; j < sband->n_bitrates; j++) {
3041                         struct ieee80211_rate *br;
3042                         int brate;
3043
3044                         br = &sband->bitrates[j];
3045
3046                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3047                         if (brate == rate) {
3048                                 *rates |= BIT(j);
3049                                 if (is_basic)
3050                                         *basic_rates |= BIT(j);
3051                                 if ((rate * 5) < *min_rate) {
3052                                         *min_rate = rate * 5;
3053                                         *min_rate_index = j;
3054                                 }
3055                                 break;
3056                         }
3057                 }
3058         }
3059 }
3060
3061 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3062                                         const struct ieee802_11_elems *elems)
3063 {
3064         if (elems->ext_capab_len < 10)
3065                 return false;
3066
3067         if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3068                 return false;
3069
3070         return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3071                 IEEE80211_HE_MAC_CAP0_TWT_RES;
3072 }
3073
3074 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3075                                     struct cfg80211_bss *cbss,
3076                                     struct ieee80211_mgmt *mgmt, size_t len)
3077 {
3078         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3079         struct ieee80211_local *local = sdata->local;
3080         struct ieee80211_supported_band *sband;
3081         struct sta_info *sta;
3082         u8 *pos;
3083         u16 capab_info, aid;
3084         struct ieee802_11_elems elems;
3085         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3086         const struct cfg80211_bss_ies *bss_ies = NULL;
3087         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3088         u32 changed = 0;
3089         int err;
3090         bool ret;
3091
3092         /* AssocResp and ReassocResp have identical structure */
3093
3094         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3095         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3096
3097         /*
3098          * The 5 MSB of the AID field are reserved
3099          * (802.11-2016 9.4.1.8 AID field)
3100          */
3101         aid &= 0x7ff;
3102
3103         ifmgd->broken_ap = false;
3104
3105         if (aid == 0 || aid > IEEE80211_MAX_AID) {
3106                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3107                            aid);
3108                 aid = 0;
3109                 ifmgd->broken_ap = true;
3110         }
3111
3112         pos = mgmt->u.assoc_resp.variable;
3113         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3114
3115         if (!elems.supp_rates) {
3116                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3117                 return false;
3118         }
3119
3120         ifmgd->aid = aid;
3121         ifmgd->tdls_chan_switch_prohibited =
3122                 elems.ext_capab && elems.ext_capab_len >= 5 &&
3123                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3124
3125         /*
3126          * Some APs are erroneously not including some information in their
3127          * (re)association response frames. Try to recover by using the data
3128          * from the beacon or probe response. This seems to afflict mobile
3129          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3130          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3131          */
3132         if ((assoc_data->wmm && !elems.wmm_param) ||
3133             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3134              (!elems.ht_cap_elem || !elems.ht_operation)) ||
3135             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3136              (!elems.vht_cap_elem || !elems.vht_operation))) {
3137                 const struct cfg80211_bss_ies *ies;
3138                 struct ieee802_11_elems bss_elems;
3139
3140                 rcu_read_lock();
3141                 ies = rcu_dereference(cbss->ies);
3142                 if (ies)
3143                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3144                                           GFP_ATOMIC);
3145                 rcu_read_unlock();
3146                 if (!bss_ies)
3147                         return false;
3148
3149                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3150                                        false, &bss_elems);
3151                 if (assoc_data->wmm &&
3152                     !elems.wmm_param && bss_elems.wmm_param) {
3153                         elems.wmm_param = bss_elems.wmm_param;
3154                         sdata_info(sdata,
3155                                    "AP bug: WMM param missing from AssocResp\n");
3156                 }
3157
3158                 /*
3159                  * Also check if we requested HT/VHT, otherwise the AP doesn't
3160                  * have to include the IEs in the (re)association response.
3161                  */
3162                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
3163                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3164                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
3165                         sdata_info(sdata,
3166                                    "AP bug: HT capability missing from AssocResp\n");
3167                 }
3168                 if (!elems.ht_operation && bss_elems.ht_operation &&
3169                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3170                         elems.ht_operation = bss_elems.ht_operation;
3171                         sdata_info(sdata,
3172                                    "AP bug: HT operation missing from AssocResp\n");
3173                 }
3174                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3175                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3176                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
3177                         sdata_info(sdata,
3178                                    "AP bug: VHT capa missing from AssocResp\n");
3179                 }
3180                 if (!elems.vht_operation && bss_elems.vht_operation &&
3181                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3182                         elems.vht_operation = bss_elems.vht_operation;
3183                         sdata_info(sdata,
3184                                    "AP bug: VHT operation missing from AssocResp\n");
3185                 }
3186         }
3187
3188         /*
3189          * We previously checked these in the beacon/probe response, so
3190          * they should be present here. This is just a safety net.
3191          */
3192         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3193             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3194                 sdata_info(sdata,
3195                            "HT AP is missing WMM params or HT capability/operation\n");
3196                 ret = false;
3197                 goto out;
3198         }
3199
3200         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3201             (!elems.vht_cap_elem || !elems.vht_operation)) {
3202                 sdata_info(sdata,
3203                            "VHT AP is missing VHT capability/operation\n");
3204                 ret = false;
3205                 goto out;
3206         }
3207
3208         mutex_lock(&sdata->local->sta_mtx);
3209         /*
3210          * station info was already allocated and inserted before
3211          * the association and should be available to us
3212          */
3213         sta = sta_info_get(sdata, cbss->bssid);
3214         if (WARN_ON(!sta)) {
3215                 mutex_unlock(&sdata->local->sta_mtx);
3216                 ret = false;
3217                 goto out;
3218         }
3219
3220         sband = ieee80211_get_sband(sdata);
3221         if (!sband) {
3222                 mutex_unlock(&sdata->local->sta_mtx);
3223                 ret = false;
3224                 goto out;
3225         }
3226
3227         /*
3228          * If AP doesn't support HT, or it doesn't have HE mandatory IEs, mark
3229          * HE as disabled. If on the 5GHz band, make sure it supports VHT.
3230          */
3231         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
3232             (sband->band == NL80211_BAND_5GHZ &&
3233              ifmgd->flags & IEEE80211_STA_DISABLE_VHT) ||
3234             (!elems.he_cap && !elems.he_operation))
3235                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
3236
3237         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3238             (!elems.he_cap || !elems.he_operation)) {
3239                 mutex_unlock(&sdata->local->sta_mtx);
3240                 sdata_info(sdata,
3241                            "HE AP is missing HE capability/operation\n");
3242                 ret = false;
3243                 goto out;
3244         }
3245
3246         /* Set up internal HT/VHT capabilities */
3247         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3248                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3249                                                   elems.ht_cap_elem, sta);
3250
3251         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3252                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3253                                                     elems.vht_cap_elem, sta);
3254
3255         if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3256             elems.he_cap) {
3257                 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3258                                                   elems.he_cap,
3259                                                   elems.he_cap_len,
3260                                                   sta);
3261
3262                 bss_conf->he_support = sta->sta.he_cap.has_he;
3263                 bss_conf->twt_requester =
3264                         ieee80211_twt_req_supported(sta, &elems);
3265         } else {
3266                 bss_conf->he_support = false;
3267                 bss_conf->twt_requester = false;
3268         }
3269
3270         if (bss_conf->he_support) {
3271                 bss_conf->bss_color =
3272                         le32_get_bits(elems.he_operation->he_oper_params,
3273                                       IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3274
3275                 bss_conf->htc_trig_based_pkt_ext =
3276                         le32_get_bits(elems.he_operation->he_oper_params,
3277                               IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3278                 bss_conf->frame_time_rts_th =
3279                         le32_get_bits(elems.he_operation->he_oper_params,
3280                               IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3281
3282                 bss_conf->multi_sta_back_32bit =
3283                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3284                         IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3285
3286                 bss_conf->ack_enabled =
3287                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3288                         IEEE80211_HE_MAC_CAP2_ACK_EN;
3289
3290                 bss_conf->uora_exists = !!elems.uora_element;
3291                 if (elems.uora_element)
3292                         bss_conf->uora_ocw_range = elems.uora_element[0];
3293
3294                 /* TODO: OPEN: what happens if BSS color disable is set? */
3295         }
3296
3297         /*
3298          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3299          * in their association response, so ignore that data for our own
3300          * configuration. If it changed since the last beacon, we'll get the
3301          * next beacon and update then.
3302          */
3303
3304         /*
3305          * If an operating mode notification IE is present, override the
3306          * NSS calculation (that would be done in rate_control_rate_init())
3307          * and use the # of streams from that element.
3308          */
3309         if (elems.opmode_notif &&
3310             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3311                 u8 nss;
3312
3313                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3314                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3315                 nss += 1;
3316                 sta->sta.rx_nss = nss;
3317         }
3318
3319         rate_control_rate_init(sta);
3320
3321         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3322                 set_sta_flag(sta, WLAN_STA_MFP);
3323                 sta->sta.mfp = true;
3324         } else {
3325                 sta->sta.mfp = false;
3326         }
3327
3328         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3329
3330         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3331         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3332                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3333         if (err) {
3334                 sdata_info(sdata,
3335                            "failed to move station %pM to desired state\n",
3336                            sta->sta.addr);
3337                 WARN_ON(__sta_info_destroy(sta));
3338                 mutex_unlock(&sdata->local->sta_mtx);
3339                 ret = false;
3340                 goto out;
3341         }
3342
3343         mutex_unlock(&sdata->local->sta_mtx);
3344
3345         /*
3346          * Always handle WMM once after association regardless
3347          * of the first value the AP uses. Setting -1 here has
3348          * that effect because the AP values is an unsigned
3349          * 4-bit value.
3350          */
3351         ifmgd->wmm_last_param_set = -1;
3352
3353         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3354                 ieee80211_set_wmm_default(sdata, false, false);
3355         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3356                                              elems.wmm_param_len,
3357                                              elems.mu_edca_param_set)) {
3358                 /* still enable QoS since we might have HT/VHT */
3359                 ieee80211_set_wmm_default(sdata, false, true);
3360                 /* set the disable-WMM flag in this case to disable
3361                  * tracking WMM parameter changes in the beacon if
3362                  * the parameters weren't actually valid. Doing so
3363                  * avoids changing parameters very strangely when
3364                  * the AP is going back and forth between valid and
3365                  * invalid parameters.
3366                  */
3367                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3368         }
3369         changed |= BSS_CHANGED_QOS;
3370
3371         if (elems.max_idle_period_ie) {
3372                 bss_conf->max_idle_period =
3373                         le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3374                 bss_conf->protected_keep_alive =
3375                         !!(elems.max_idle_period_ie->idle_options &
3376                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3377                 changed |= BSS_CHANGED_KEEP_ALIVE;
3378         } else {
3379                 bss_conf->max_idle_period = 0;
3380                 bss_conf->protected_keep_alive = false;
3381         }
3382
3383         /* set AID and assoc capability,
3384          * ieee80211_set_associated() will tell the driver */
3385         bss_conf->aid = aid;
3386         bss_conf->assoc_capability = capab_info;
3387         ieee80211_set_associated(sdata, cbss, changed);
3388
3389         /*
3390          * If we're using 4-addr mode, let the AP know that we're
3391          * doing so, so that it can create the STA VLAN on its side
3392          */
3393         if (ifmgd->use_4addr)
3394                 ieee80211_send_4addr_nullfunc(local, sdata);
3395
3396         /*
3397          * Start timer to probe the connection to the AP now.
3398          * Also start the timer that will detect beacon loss.
3399          */
3400         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3401         ieee80211_sta_reset_beacon_monitor(sdata);
3402
3403         ret = true;
3404  out:
3405         kfree(bss_ies);
3406         return ret;
3407 }
3408
3409 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3410                                          struct ieee80211_mgmt *mgmt,
3411                                          size_t len)
3412 {
3413         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3414         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3415         u16 capab_info, status_code, aid;
3416         struct ieee802_11_elems elems;
3417         int ac, uapsd_queues = -1;
3418         u8 *pos;
3419         bool reassoc;
3420         struct cfg80211_bss *bss;
3421         struct ieee80211_event event = {
3422                 .type = MLME_EVENT,
3423                 .u.mlme.data = ASSOC_EVENT,
3424         };
3425
3426         sdata_assert_lock(sdata);
3427
3428         if (!assoc_data)
3429                 return;
3430         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3431                 return;
3432
3433         /*
3434          * AssocResp and ReassocResp have identical structure, so process both
3435          * of them in this function.
3436          */
3437
3438         if (len < 24 + 6)
3439                 return;
3440
3441         reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3442         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3443         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3444         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3445
3446         sdata_info(sdata,
3447                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3448                    reassoc ? "Rea" : "A", mgmt->sa,
3449                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3450
3451         if (assoc_data->fils_kek_len &&
3452             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3453                 return;
3454
3455         pos = mgmt->u.assoc_resp.variable;
3456         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3457
3458         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3459             elems.timeout_int &&
3460             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3461                 u32 tu, ms;
3462                 tu = le32_to_cpu(elems.timeout_int->value);
3463                 ms = tu * 1024 / 1000;
3464                 sdata_info(sdata,
3465                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3466                            mgmt->sa, tu, ms);
3467                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3468                 assoc_data->timeout_started = true;
3469                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3470                         run_again(sdata, assoc_data->timeout);
3471                 return;
3472         }
3473
3474         bss = assoc_data->bss;
3475
3476         if (status_code != WLAN_STATUS_SUCCESS) {
3477                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3478                            mgmt->sa, status_code);
3479                 ieee80211_destroy_assoc_data(sdata, false, false);
3480                 event.u.mlme.status = MLME_DENIED;
3481                 event.u.mlme.reason = status_code;
3482                 drv_event_callback(sdata->local, sdata, &event);
3483         } else {
3484                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3485                         /* oops -- internal error -- send timeout for now */
3486                         ieee80211_destroy_assoc_data(sdata, false, false);
3487                         cfg80211_assoc_timeout(sdata->dev, bss);
3488                         return;
3489                 }
3490                 event.u.mlme.status = MLME_SUCCESS;
3491                 drv_event_callback(sdata->local, sdata, &event);
3492                 sdata_info(sdata, "associated\n");
3493
3494                 /*
3495                  * destroy assoc_data afterwards, as otherwise an idle
3496                  * recalc after assoc_data is NULL but before associated
3497                  * is set can cause the interface to go idle
3498                  */
3499                 ieee80211_destroy_assoc_data(sdata, true, false);
3500
3501                 /* get uapsd queues configuration */
3502                 uapsd_queues = 0;
3503                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3504                         if (sdata->tx_conf[ac].uapsd)
3505                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3506         }
3507
3508         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3509 }
3510
3511 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3512                                   struct ieee80211_mgmt *mgmt, size_t len,
3513                                   struct ieee80211_rx_status *rx_status,
3514                                   struct ieee802_11_elems *elems)
3515 {
3516         struct ieee80211_local *local = sdata->local;
3517         struct ieee80211_bss *bss;
3518         struct ieee80211_channel *channel;
3519
3520         sdata_assert_lock(sdata);
3521
3522         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3523         if (!channel)
3524                 return;
3525
3526         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3527                                         channel);
3528         if (bss) {
3529                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3530                 ieee80211_rx_bss_put(local, bss);
3531         }
3532 }
3533
3534
3535 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3536                                          struct sk_buff *skb)
3537 {
3538         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3539         struct ieee80211_if_managed *ifmgd;
3540         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3541         size_t baselen, len = skb->len;
3542         struct ieee802_11_elems elems;
3543
3544         ifmgd = &sdata->u.mgd;
3545
3546         sdata_assert_lock(sdata);
3547
3548         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3549                 return; /* ignore ProbeResp to foreign address */
3550
3551         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3552         if (baselen > len)
3553                 return;
3554
3555         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3556                                false, &elems);
3557
3558         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3559
3560         if (ifmgd->associated &&
3561             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3562                 ieee80211_reset_ap_probe(sdata);
3563 }
3564
3565 /*
3566  * This is the canonical list of information elements we care about,
3567  * the filter code also gives us all changes to the Microsoft OUI
3568  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3569  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3570  * changes to requested client power.
3571  *
3572  * We implement beacon filtering in software since that means we can
3573  * avoid processing the frame here and in cfg80211, and userspace
3574  * will not be able to tell whether the hardware supports it or not.
3575  *
3576  * XXX: This list needs to be dynamic -- userspace needs to be able to
3577  *      add items it requires. It also needs to be able to tell us to
3578  *      look out for other vendor IEs.
3579  */
3580 static const u64 care_about_ies =
3581         (1ULL << WLAN_EID_COUNTRY) |
3582         (1ULL << WLAN_EID_ERP_INFO) |
3583         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3584         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3585         (1ULL << WLAN_EID_HT_CAPABILITY) |
3586         (1ULL << WLAN_EID_HT_OPERATION) |
3587         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3588
3589 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3590                                         struct ieee80211_if_managed *ifmgd,
3591                                         struct ieee80211_bss_conf *bss_conf,
3592                                         struct ieee80211_local *local,
3593                                         struct ieee80211_rx_status *rx_status)
3594 {
3595         /* Track average RSSI from the Beacon frames of the current AP */
3596
3597         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3598                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3599                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3600                 ifmgd->last_cqm_event_signal = 0;
3601                 ifmgd->count_beacon_signal = 1;
3602                 ifmgd->last_ave_beacon_signal = 0;
3603         } else {
3604                 ifmgd->count_beacon_signal++;
3605         }
3606
3607         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3608
3609         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3610             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3611                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3612                 int last_sig = ifmgd->last_ave_beacon_signal;
3613                 struct ieee80211_event event = {
3614                         .type = RSSI_EVENT,
3615                 };
3616
3617                 /*
3618                  * if signal crosses either of the boundaries, invoke callback
3619                  * with appropriate parameters
3620                  */
3621                 if (sig > ifmgd->rssi_max_thold &&
3622                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3623                         ifmgd->last_ave_beacon_signal = sig;
3624                         event.u.rssi.data = RSSI_EVENT_HIGH;
3625                         drv_event_callback(local, sdata, &event);
3626                 } else if (sig < ifmgd->rssi_min_thold &&
3627                            (last_sig >= ifmgd->rssi_max_thold ||
3628                            last_sig == 0)) {
3629                         ifmgd->last_ave_beacon_signal = sig;
3630                         event.u.rssi.data = RSSI_EVENT_LOW;
3631                         drv_event_callback(local, sdata, &event);
3632                 }
3633         }
3634
3635         if (bss_conf->cqm_rssi_thold &&
3636             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3637             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3638                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3639                 int last_event = ifmgd->last_cqm_event_signal;
3640                 int thold = bss_conf->cqm_rssi_thold;
3641                 int hyst = bss_conf->cqm_rssi_hyst;
3642
3643                 if (sig < thold &&
3644                     (last_event == 0 || sig < last_event - hyst)) {
3645                         ifmgd->last_cqm_event_signal = sig;
3646                         ieee80211_cqm_rssi_notify(
3647                                 &sdata->vif,
3648                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3649                                 sig, GFP_KERNEL);
3650                 } else if (sig > thold &&
3651                            (last_event == 0 || sig > last_event + hyst)) {
3652                         ifmgd->last_cqm_event_signal = sig;
3653                         ieee80211_cqm_rssi_notify(
3654                                 &sdata->vif,
3655                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3656                                 sig, GFP_KERNEL);
3657                 }
3658         }
3659
3660         if (bss_conf->cqm_rssi_low &&
3661             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3662                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3663                 int last_event = ifmgd->last_cqm_event_signal;
3664                 int low = bss_conf->cqm_rssi_low;
3665                 int high = bss_conf->cqm_rssi_high;
3666
3667                 if (sig < low &&
3668                     (last_event == 0 || last_event >= low)) {
3669                         ifmgd->last_cqm_event_signal = sig;
3670                         ieee80211_cqm_rssi_notify(
3671                                 &sdata->vif,
3672                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3673                                 sig, GFP_KERNEL);
3674                 } else if (sig > high &&
3675                            (last_event == 0 || last_event <= high)) {
3676                         ifmgd->last_cqm_event_signal = sig;
3677                         ieee80211_cqm_rssi_notify(
3678                                 &sdata->vif,
3679                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3680                                 sig, GFP_KERNEL);
3681                 }
3682         }
3683 }
3684
3685 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3686                                      struct ieee80211_mgmt *mgmt, size_t len,
3687                                      struct ieee80211_rx_status *rx_status)
3688 {
3689         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3690         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3691         size_t baselen;
3692         struct ieee802_11_elems elems;
3693         struct ieee80211_local *local = sdata->local;
3694         struct ieee80211_chanctx_conf *chanctx_conf;
3695         struct ieee80211_channel *chan;
3696         struct sta_info *sta;
3697         u32 changed = 0;
3698         bool erp_valid;
3699         u8 erp_value = 0;
3700         u32 ncrc;
3701         u8 *bssid;
3702         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3703
3704         sdata_assert_lock(sdata);
3705
3706         /* Process beacon from the current BSS */
3707         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3708         if (baselen > len)
3709                 return;
3710
3711         rcu_read_lock();
3712         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3713         if (!chanctx_conf) {
3714                 rcu_read_unlock();
3715                 return;
3716         }
3717
3718         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3719                 rcu_read_unlock();
3720                 return;
3721         }
3722         chan = chanctx_conf->def.chan;
3723         rcu_read_unlock();
3724
3725         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3726             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3727                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3728                                        len - baselen, false, &elems);
3729
3730                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3731                 if (elems.tim && !elems.parse_error) {
3732                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3733                         ifmgd->dtim_period = tim_ie->dtim_period;
3734                 }
3735                 ifmgd->have_beacon = true;
3736                 ifmgd->assoc_data->need_beacon = false;
3737                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3738                         sdata->vif.bss_conf.sync_tsf =
3739                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3740                         sdata->vif.bss_conf.sync_device_ts =
3741                                 rx_status->device_timestamp;
3742                         if (elems.tim)
3743                                 sdata->vif.bss_conf.sync_dtim_count =
3744                                         elems.tim->dtim_count;
3745                         else
3746                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3747                 }
3748                 /* continue assoc process */
3749                 ifmgd->assoc_data->timeout = jiffies;
3750                 ifmgd->assoc_data->timeout_started = true;
3751                 run_again(sdata, ifmgd->assoc_data->timeout);
3752                 return;
3753         }
3754
3755         if (!ifmgd->associated ||
3756             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3757                 return;
3758         bssid = ifmgd->associated->bssid;
3759
3760         if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3761                 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3762                                             local, rx_status);
3763
3764         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3765                 mlme_dbg_ratelimited(sdata,
3766                                      "cancelling AP probe due to a received beacon\n");
3767                 ieee80211_reset_ap_probe(sdata);
3768         }
3769
3770         /*
3771          * Push the beacon loss detection into the future since
3772          * we are processing a beacon from the AP just now.
3773          */
3774         ieee80211_sta_reset_beacon_monitor(sdata);
3775
3776         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3777         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3778                                           len - baselen, false, &elems,
3779                                           care_about_ies, ncrc);
3780
3781         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3782             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3783                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3784                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3785                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3786                                 ieee80211_hw_config(local,
3787                                                     IEEE80211_CONF_CHANGE_PS);
3788                         }
3789                         ieee80211_send_nullfunc(local, sdata, false);
3790                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3791                         local->pspolling = true;
3792
3793                         /*
3794                          * Here is assumed that the driver will be
3795                          * able to send ps-poll frame and receive a
3796                          * response even though power save mode is
3797                          * enabled, but some drivers might require
3798                          * to disable power save here. This needs
3799                          * to be investigated.
3800                          */
3801                         ieee80211_send_pspoll(local, sdata);
3802                 }
3803         }
3804
3805         if (sdata->vif.p2p ||
3806             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3807                 struct ieee80211_p2p_noa_attr noa = {};
3808                 int ret;
3809
3810                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3811                                             len - baselen,
3812                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3813                                             (u8 *) &noa, sizeof(noa));
3814                 if (ret >= 2) {
3815                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3816                                 /* valid noa_attr and index changed */
3817                                 sdata->u.mgd.p2p_noa_index = noa.index;
3818                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3819                                 changed |= BSS_CHANGED_P2P_PS;
3820                                 /*
3821                                  * make sure we update all information, the CRC
3822                                  * mechanism doesn't look at P2P attributes.
3823                                  */
3824                                 ifmgd->beacon_crc_valid = false;
3825                         }
3826                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3827                         /* noa_attr not found and we had valid noa_attr before */
3828                         sdata->u.mgd.p2p_noa_index = -1;
3829                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3830                         changed |= BSS_CHANGED_P2P_PS;
3831                         ifmgd->beacon_crc_valid = false;
3832                 }
3833         }
3834
3835         if (ifmgd->csa_waiting_bcn)
3836                 ieee80211_chswitch_post_beacon(sdata);
3837
3838         /*
3839          * Update beacon timing and dtim count on every beacon appearance. This
3840          * will allow the driver to use the most updated values. Do it before
3841          * comparing this one with last received beacon.
3842          * IMPORTANT: These parameters would possibly be out of sync by the time
3843          * the driver will use them. The synchronized view is currently
3844          * guaranteed only in certain callbacks.
3845          */
3846         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3847                 sdata->vif.bss_conf.sync_tsf =
3848                         le64_to_cpu(mgmt->u.beacon.timestamp);
3849                 sdata->vif.bss_conf.sync_device_ts =
3850                         rx_status->device_timestamp;
3851                 if (elems.tim)
3852                         sdata->vif.bss_conf.sync_dtim_count =
3853                                 elems.tim->dtim_count;
3854                 else
3855                         sdata->vif.bss_conf.sync_dtim_count = 0;
3856         }
3857
3858         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3859                 return;
3860         ifmgd->beacon_crc = ncrc;
3861         ifmgd->beacon_crc_valid = true;
3862
3863         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3864
3865         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3866                                          rx_status->device_timestamp,
3867                                          &elems, true);
3868
3869         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3870             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3871                                      elems.wmm_param_len,
3872                                      elems.mu_edca_param_set))
3873                 changed |= BSS_CHANGED_QOS;
3874
3875         /*
3876          * If we haven't had a beacon before, tell the driver about the
3877          * DTIM period (and beacon timing if desired) now.
3878          */
3879         if (!ifmgd->have_beacon) {
3880                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3881                 if (elems.tim)
3882                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3883                 else
3884                         bss_conf->dtim_period = 1;
3885
3886                 changed |= BSS_CHANGED_BEACON_INFO;
3887                 ifmgd->have_beacon = true;
3888
3889                 mutex_lock(&local->iflist_mtx);
3890                 ieee80211_recalc_ps(local);
3891                 mutex_unlock(&local->iflist_mtx);
3892
3893                 ieee80211_recalc_ps_vif(sdata);
3894         }
3895
3896         if (elems.erp_info) {
3897                 erp_valid = true;
3898                 erp_value = elems.erp_info[0];
3899         } else {
3900                 erp_valid = false;
3901         }
3902         changed |= ieee80211_handle_bss_capability(sdata,
3903                         le16_to_cpu(mgmt->u.beacon.capab_info),
3904                         erp_valid, erp_value);
3905
3906         mutex_lock(&local->sta_mtx);
3907         sta = sta_info_get(sdata, bssid);
3908
3909         if (ieee80211_config_bw(sdata, sta,
3910                                 elems.ht_cap_elem, elems.ht_operation,
3911                                 elems.vht_operation, elems.he_operation,
3912                                 bssid, &changed)) {
3913                 mutex_unlock(&local->sta_mtx);
3914                 sdata_info(sdata,
3915                            "failed to follow AP %pM bandwidth change, disconnect\n",
3916                            bssid);
3917                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3918                                        WLAN_REASON_DEAUTH_LEAVING,
3919                                        true, deauth_buf);
3920                 ieee80211_report_disconnect(sdata, deauth_buf,
3921                                             sizeof(deauth_buf), true,
3922                                             WLAN_REASON_DEAUTH_LEAVING);
3923                 return;
3924         }
3925
3926         if (sta && elems.opmode_notif)
3927                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3928                                             rx_status->band);
3929         mutex_unlock(&local->sta_mtx);
3930
3931         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3932                                                elems.country_elem,
3933                                                elems.country_elem_len,
3934                                                elems.pwr_constr_elem,
3935                                                elems.cisco_dtpc_elem);
3936
3937         ieee80211_bss_info_change_notify(sdata, changed);
3938 }
3939
3940 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3941                                   struct sk_buff *skb)
3942 {
3943         struct ieee80211_rx_status *rx_status;
3944         struct ieee80211_mgmt *mgmt;
3945         u16 fc;
3946         struct ieee802_11_elems elems;
3947         int ies_len;
3948
3949         rx_status = (struct ieee80211_rx_status *) skb->cb;
3950         mgmt = (struct ieee80211_mgmt *) skb->data;
3951         fc = le16_to_cpu(mgmt->frame_control);
3952
3953         sdata_lock(sdata);
3954
3955         switch (fc & IEEE80211_FCTL_STYPE) {
3956         case IEEE80211_STYPE_BEACON:
3957                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3958                 break;
3959         case IEEE80211_STYPE_PROBE_RESP:
3960                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3961                 break;
3962         case IEEE80211_STYPE_AUTH:
3963                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3964                 break;
3965         case IEEE80211_STYPE_DEAUTH:
3966                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3967                 break;
3968         case IEEE80211_STYPE_DISASSOC:
3969                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3970                 break;
3971         case IEEE80211_STYPE_ASSOC_RESP:
3972         case IEEE80211_STYPE_REASSOC_RESP:
3973                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3974                 break;
3975         case IEEE80211_STYPE_ACTION:
3976                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3977                         ies_len = skb->len -
3978                                   offsetof(struct ieee80211_mgmt,
3979                                            u.action.u.chan_switch.variable);
3980
3981                         if (ies_len < 0)
3982                                 break;
3983
3984                         ieee802_11_parse_elems(
3985                                 mgmt->u.action.u.chan_switch.variable,
3986                                 ies_len, true, &elems);
3987
3988                         if (elems.parse_error)
3989                                 break;
3990
3991                         ieee80211_sta_process_chanswitch(sdata,
3992                                                  rx_status->mactime,
3993                                                  rx_status->device_timestamp,
3994                                                  &elems, false);
3995                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3996                         ies_len = skb->len -
3997                                   offsetof(struct ieee80211_mgmt,
3998                                            u.action.u.ext_chan_switch.variable);
3999
4000                         if (ies_len < 0)
4001                                 break;
4002
4003                         ieee802_11_parse_elems(
4004                                 mgmt->u.action.u.ext_chan_switch.variable,
4005                                 ies_len, true, &elems);
4006
4007                         if (elems.parse_error)
4008                                 break;
4009
4010                         /* for the handling code pretend this was also an IE */
4011                         elems.ext_chansw_ie =
4012                                 &mgmt->u.action.u.ext_chan_switch.data;
4013
4014                         ieee80211_sta_process_chanswitch(sdata,
4015                                                  rx_status->mactime,
4016                                                  rx_status->device_timestamp,
4017                                                  &elems, false);
4018                 }
4019                 break;
4020         }
4021         sdata_unlock(sdata);
4022 }
4023
4024 static void ieee80211_sta_timer(struct timer_list *t)
4025 {
4026         struct ieee80211_sub_if_data *sdata =
4027                 from_timer(sdata, t, u.mgd.timer);
4028
4029         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4030 }
4031
4032 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4033                                           u8 *bssid, u8 reason, bool tx)
4034 {
4035         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4036
4037         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4038                                tx, frame_buf);
4039
4040         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4041                                     reason);
4042 }
4043
4044 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4045 {
4046         struct ieee80211_local *local = sdata->local;
4047         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4048         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4049         u32 tx_flags = 0;
4050         u16 trans = 1;
4051         u16 status = 0;
4052         u16 prepare_tx_duration = 0;
4053
4054         sdata_assert_lock(sdata);
4055
4056         if (WARN_ON_ONCE(!auth_data))
4057                 return -EINVAL;
4058
4059         auth_data->tries++;
4060
4061         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4062                 sdata_info(sdata, "authentication with %pM timed out\n",
4063                            auth_data->bss->bssid);
4064
4065                 /*
4066                  * Most likely AP is not in the range so remove the
4067                  * bss struct for that AP.
4068                  */
4069                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4070
4071                 return -ETIMEDOUT;
4072         }
4073
4074         if (auth_data->algorithm == WLAN_AUTH_SAE)
4075                 prepare_tx_duration =
4076                         jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4077
4078         drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4079
4080         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4081                    auth_data->bss->bssid, auth_data->tries,
4082                    IEEE80211_AUTH_MAX_TRIES);
4083
4084         auth_data->expected_transaction = 2;
4085
4086         if (auth_data->algorithm == WLAN_AUTH_SAE) {
4087                 trans = auth_data->sae_trans;
4088                 status = auth_data->sae_status;
4089                 auth_data->expected_transaction = trans;
4090         }
4091
4092         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4093                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4094                            IEEE80211_TX_INTFL_MLME_CONN_TX;
4095
4096         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4097                             auth_data->data, auth_data->data_len,
4098                             auth_data->bss->bssid,
4099                             auth_data->bss->bssid, NULL, 0, 0,
4100                             tx_flags);
4101
4102         if (tx_flags == 0) {
4103                 if (auth_data->algorithm == WLAN_AUTH_SAE)
4104                         auth_data->timeout = jiffies +
4105                                 IEEE80211_AUTH_TIMEOUT_SAE;
4106                 else
4107                         auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4108         } else {
4109                 auth_data->timeout =
4110                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4111         }
4112
4113         auth_data->timeout_started = true;
4114         run_again(sdata, auth_data->timeout);
4115
4116         return 0;
4117 }
4118
4119 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4120 {
4121         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4122         struct ieee80211_local *local = sdata->local;
4123
4124         sdata_assert_lock(sdata);
4125
4126         assoc_data->tries++;
4127         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4128                 sdata_info(sdata, "association with %pM timed out\n",
4129                            assoc_data->bss->bssid);
4130
4131                 /*
4132                  * Most likely AP is not in the range so remove the
4133                  * bss struct for that AP.
4134                  */
4135                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4136
4137                 return -ETIMEDOUT;
4138         }
4139
4140         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4141                    assoc_data->bss->bssid, assoc_data->tries,
4142                    IEEE80211_ASSOC_MAX_TRIES);
4143         ieee80211_send_assoc(sdata);
4144
4145         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4146                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4147                 assoc_data->timeout_started = true;
4148                 run_again(sdata, assoc_data->timeout);
4149         } else {
4150                 assoc_data->timeout =
4151                         round_jiffies_up(jiffies +
4152                                          IEEE80211_ASSOC_TIMEOUT_LONG);
4153                 assoc_data->timeout_started = true;
4154                 run_again(sdata, assoc_data->timeout);
4155         }
4156
4157         return 0;
4158 }
4159
4160 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4161                                   __le16 fc, bool acked)
4162 {
4163         struct ieee80211_local *local = sdata->local;
4164
4165         sdata->u.mgd.status_fc = fc;
4166         sdata->u.mgd.status_acked = acked;
4167         sdata->u.mgd.status_received = true;
4168
4169         ieee80211_queue_work(&local->hw, &sdata->work);
4170 }
4171
4172 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4173 {
4174         struct ieee80211_local *local = sdata->local;
4175         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4176
4177         sdata_lock(sdata);
4178
4179         if (ifmgd->status_received) {
4180                 __le16 fc = ifmgd->status_fc;
4181                 bool status_acked = ifmgd->status_acked;
4182
4183                 ifmgd->status_received = false;
4184                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4185                         if (status_acked) {
4186                                 if (ifmgd->auth_data->algorithm ==
4187                                     WLAN_AUTH_SAE)
4188                                         ifmgd->auth_data->timeout =
4189                                                 jiffies +
4190                                                 IEEE80211_AUTH_TIMEOUT_SAE;
4191                                 else
4192                                         ifmgd->auth_data->timeout =
4193                                                 jiffies +
4194                                                 IEEE80211_AUTH_TIMEOUT_SHORT;
4195                                 run_again(sdata, ifmgd->auth_data->timeout);
4196                         } else {
4197                                 ifmgd->auth_data->timeout = jiffies - 1;
4198                         }
4199                         ifmgd->auth_data->timeout_started = true;
4200                 } else if (ifmgd->assoc_data &&
4201                            (ieee80211_is_assoc_req(fc) ||
4202                             ieee80211_is_reassoc_req(fc))) {
4203                         if (status_acked) {
4204                                 ifmgd->assoc_data->timeout =
4205                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4206                                 run_again(sdata, ifmgd->assoc_data->timeout);
4207                         } else {
4208                                 ifmgd->assoc_data->timeout = jiffies - 1;
4209                         }
4210                         ifmgd->assoc_data->timeout_started = true;
4211                 }
4212         }
4213
4214         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4215             time_after(jiffies, ifmgd->auth_data->timeout)) {
4216                 if (ifmgd->auth_data->done) {
4217                         /*
4218                          * ok ... we waited for assoc but userspace didn't,
4219                          * so let's just kill the auth data
4220                          */
4221                         ieee80211_destroy_auth_data(sdata, false);
4222                 } else if (ieee80211_auth(sdata)) {
4223                         u8 bssid[ETH_ALEN];
4224                         struct ieee80211_event event = {
4225                                 .type = MLME_EVENT,
4226                                 .u.mlme.data = AUTH_EVENT,
4227                                 .u.mlme.status = MLME_TIMEOUT,
4228                         };
4229
4230                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4231
4232                         ieee80211_destroy_auth_data(sdata, false);
4233
4234                         cfg80211_auth_timeout(sdata->dev, bssid);
4235                         drv_event_callback(sdata->local, sdata, &event);
4236                 }
4237         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4238                 run_again(sdata, ifmgd->auth_data->timeout);
4239
4240         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4241             time_after(jiffies, ifmgd->assoc_data->timeout)) {
4242                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4243                     ieee80211_do_assoc(sdata)) {
4244                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4245                         struct ieee80211_event event = {
4246                                 .type = MLME_EVENT,
4247                                 .u.mlme.data = ASSOC_EVENT,
4248                                 .u.mlme.status = MLME_TIMEOUT,
4249                         };
4250
4251                         ieee80211_destroy_assoc_data(sdata, false, false);
4252                         cfg80211_assoc_timeout(sdata->dev, bss);
4253                         drv_event_callback(sdata->local, sdata, &event);
4254                 }
4255         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4256                 run_again(sdata, ifmgd->assoc_data->timeout);
4257
4258         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4259             ifmgd->associated) {
4260                 u8 bssid[ETH_ALEN];
4261                 int max_tries;
4262
4263                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4264
4265                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4266                         max_tries = max_nullfunc_tries;
4267                 else
4268                         max_tries = max_probe_tries;
4269
4270                 /* ACK received for nullfunc probing frame */
4271                 if (!ifmgd->probe_send_count)
4272                         ieee80211_reset_ap_probe(sdata);
4273                 else if (ifmgd->nullfunc_failed) {
4274                         if (ifmgd->probe_send_count < max_tries) {
4275                                 mlme_dbg(sdata,
4276                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4277                                          bssid, ifmgd->probe_send_count,
4278                                          max_tries);
4279                                 ieee80211_mgd_probe_ap_send(sdata);
4280                         } else {
4281                                 mlme_dbg(sdata,
4282                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4283                                          bssid);
4284                                 ieee80211_sta_connection_lost(sdata, bssid,
4285                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4286                                         false);
4287                         }
4288                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4289                         run_again(sdata, ifmgd->probe_timeout);
4290                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4291                         mlme_dbg(sdata,
4292                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4293                                  bssid, probe_wait_ms);
4294                         ieee80211_sta_connection_lost(sdata, bssid,
4295                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4296                 } else if (ifmgd->probe_send_count < max_tries) {
4297                         mlme_dbg(sdata,
4298                                  "No probe response from AP %pM after %dms, try %d/%i\n",
4299                                  bssid, probe_wait_ms,
4300                                  ifmgd->probe_send_count, max_tries);
4301                         ieee80211_mgd_probe_ap_send(sdata);
4302                 } else {
4303                         /*
4304                          * We actually lost the connection ... or did we?
4305                          * Let's make sure!
4306                          */
4307                         mlme_dbg(sdata,
4308                                  "No probe response from AP %pM after %dms, disconnecting.\n",
4309                                  bssid, probe_wait_ms);
4310
4311                         ieee80211_sta_connection_lost(sdata, bssid,
4312                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4313                 }
4314         }
4315
4316         sdata_unlock(sdata);
4317 }
4318
4319 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4320 {
4321         struct ieee80211_sub_if_data *sdata =
4322                 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4323         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4324
4325         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4326                 return;
4327
4328         sdata->u.mgd.connection_loss = false;
4329         ieee80211_queue_work(&sdata->local->hw,
4330                              &sdata->u.mgd.beacon_connection_loss_work);
4331 }
4332
4333 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4334 {
4335         struct ieee80211_sub_if_data *sdata =
4336                 from_timer(sdata, t, u.mgd.conn_mon_timer);
4337         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4338         struct ieee80211_local *local = sdata->local;
4339
4340         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4341                 return;
4342
4343         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4344 }
4345
4346 static void ieee80211_sta_monitor_work(struct work_struct *work)
4347 {
4348         struct ieee80211_sub_if_data *sdata =
4349                 container_of(work, struct ieee80211_sub_if_data,
4350                              u.mgd.monitor_work);
4351
4352         ieee80211_mgd_probe_ap(sdata, false);
4353 }
4354
4355 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4356 {
4357         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4358                 __ieee80211_stop_poll(sdata);
4359
4360                 /* let's probe the connection once */
4361                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4362                         ieee80211_queue_work(&sdata->local->hw,
4363                                              &sdata->u.mgd.monitor_work);
4364         }
4365 }
4366
4367 #ifdef CONFIG_PM
4368 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4369 {
4370         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4371         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4372
4373         sdata_lock(sdata);
4374
4375         if (ifmgd->auth_data || ifmgd->assoc_data) {
4376                 const u8 *bssid = ifmgd->auth_data ?
4377                                 ifmgd->auth_data->bss->bssid :
4378                                 ifmgd->assoc_data->bss->bssid;
4379
4380                 /*
4381                  * If we are trying to authenticate / associate while suspending,
4382                  * cfg80211 won't know and won't actually abort those attempts,
4383                  * thus we need to do that ourselves.
4384                  */
4385                 ieee80211_send_deauth_disassoc(sdata, bssid,
4386                                                IEEE80211_STYPE_DEAUTH,
4387                                                WLAN_REASON_DEAUTH_LEAVING,
4388                                                false, frame_buf);
4389                 if (ifmgd->assoc_data)
4390                         ieee80211_destroy_assoc_data(sdata, false, true);
4391                 if (ifmgd->auth_data)
4392                         ieee80211_destroy_auth_data(sdata, false);
4393                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4394                                       IEEE80211_DEAUTH_FRAME_LEN);
4395         }
4396
4397         /* This is a bit of a hack - we should find a better and more generic
4398          * solution to this. Normally when suspending, cfg80211 will in fact
4399          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4400          * auth (not so important) or assoc (this is the problem) process.
4401          *
4402          * As a consequence, it can happen that we are in the process of both
4403          * associating and suspending, and receive an association response
4404          * after cfg80211 has checked if it needs to disconnect, but before
4405          * we actually set the flag to drop incoming frames. This will then
4406          * cause the workqueue flush to process the association response in
4407          * the suspend, resulting in a successful association just before it
4408          * tries to remove the interface from the driver, which now though
4409          * has a channel context assigned ... this results in issues.
4410          *
4411          * To work around this (for now) simply deauth here again if we're
4412          * now connected.
4413          */
4414         if (ifmgd->associated && !sdata->local->wowlan) {
4415                 u8 bssid[ETH_ALEN];
4416                 struct cfg80211_deauth_request req = {
4417                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4418                         .bssid = bssid,
4419                 };
4420
4421                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4422                 ieee80211_mgd_deauth(sdata, &req);
4423         }
4424
4425         sdata_unlock(sdata);
4426 }
4427
4428 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4429 {
4430         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4431
4432         sdata_lock(sdata);
4433         if (!ifmgd->associated) {
4434                 sdata_unlock(sdata);
4435                 return;
4436         }
4437
4438         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4439                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4440                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4441                 ieee80211_sta_connection_lost(sdata,
4442                                               ifmgd->associated->bssid,
4443                                               WLAN_REASON_UNSPECIFIED,
4444                                               true);
4445                 sdata_unlock(sdata);
4446                 return;
4447         }
4448         sdata_unlock(sdata);
4449 }
4450 #endif
4451
4452 /* interface setup */
4453 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4454 {
4455         struct ieee80211_if_managed *ifmgd;
4456
4457         ifmgd = &sdata->u.mgd;
4458         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4459         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4460         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4461                   ieee80211_beacon_connection_loss_work);
4462         INIT_WORK(&ifmgd->csa_connection_drop_work,
4463                   ieee80211_csa_connection_drop_work);
4464         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4465         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4466                           ieee80211_tdls_peer_del_work);
4467         timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4468         timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4469         timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4470         timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4471         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4472                           ieee80211_sta_handle_tspec_ac_params_wk);
4473
4474         ifmgd->flags = 0;
4475         ifmgd->powersave = sdata->wdev.ps;
4476         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4477         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4478         ifmgd->p2p_noa_index = -1;
4479
4480         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4481                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4482         else
4483                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4484
4485         /* Setup TDLS data */
4486         spin_lock_init(&ifmgd->teardown_lock);
4487         ifmgd->teardown_skb = NULL;
4488         ifmgd->orig_teardown_skb = NULL;
4489 }
4490
4491 /* scan finished notification */
4492 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4493 {
4494         struct ieee80211_sub_if_data *sdata;
4495
4496         /* Restart STA timers */
4497         rcu_read_lock();
4498         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4499                 if (ieee80211_sdata_running(sdata))
4500                         ieee80211_restart_sta_timer(sdata);
4501         }
4502         rcu_read_unlock();
4503 }
4504
4505 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4506                                      struct cfg80211_bss *cbss)
4507 {
4508         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4509         const u8 *ht_cap_ie, *vht_cap_ie;
4510         const struct ieee80211_ht_cap *ht_cap;
4511         const struct ieee80211_vht_cap *vht_cap;
4512         u8 chains = 1;
4513
4514         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4515                 return chains;
4516
4517         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4518         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4519                 ht_cap = (void *)(ht_cap_ie + 2);
4520                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4521                 /*
4522                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4523                  *       "Tx Unequal Modulation Supported" fields.
4524                  */
4525         }
4526
4527         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4528                 return chains;
4529
4530         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4531         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4532                 u8 nss;
4533                 u16 tx_mcs_map;
4534
4535                 vht_cap = (void *)(vht_cap_ie + 2);
4536                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4537                 for (nss = 8; nss > 0; nss--) {
4538                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4539                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4540                                 break;
4541                 }
4542                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4543                 chains = max(chains, nss);
4544         }
4545
4546         return chains;
4547 }
4548
4549 static bool
4550 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4551                                     const struct ieee80211_he_operation *he_op)
4552 {
4553         const struct ieee80211_sta_he_cap *sta_he_cap =
4554                 ieee80211_get_he_sta_cap(sband);
4555         u16 ap_min_req_set;
4556         int i;
4557
4558         if (!sta_he_cap || !he_op)
4559                 return false;
4560
4561         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4562
4563         /* Need to go over for 80MHz, 160MHz and for 80+80 */
4564         for (i = 0; i < 3; i++) {
4565                 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4566                         &sta_he_cap->he_mcs_nss_supp;
4567                 u16 sta_mcs_map_rx =
4568                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4569                 u16 sta_mcs_map_tx =
4570                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4571                 u8 nss;
4572                 bool verified = true;
4573
4574                 /*
4575                  * For each band there is a maximum of 8 spatial streams
4576                  * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4577                  * of 2 bits per NSS (1-8), with the values defined in enum
4578                  * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4579                  * capabilities aren't less than the AP's minimum requirements
4580                  * for this HE BSS per SS.
4581                  * It is enough to find one such band that meets the reqs.
4582                  */
4583                 for (nss = 8; nss > 0; nss--) {
4584                         u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4585                         u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4586                         u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4587
4588                         if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4589                                 continue;
4590
4591                         /*
4592                          * Make sure the HE AP doesn't require MCSs that aren't
4593                          * supported by the client
4594                          */
4595                         if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4596                             sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4597                             (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4598                                 verified = false;
4599                                 break;
4600                         }
4601                 }
4602
4603                 if (verified)
4604                         return true;
4605         }
4606
4607         /* If here, STA doesn't meet AP's HE min requirements */
4608         return false;
4609 }
4610
4611 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4612                                   struct cfg80211_bss *cbss)
4613 {
4614         struct ieee80211_local *local = sdata->local;
4615         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4616         const struct ieee80211_ht_cap *ht_cap = NULL;
4617         const struct ieee80211_ht_operation *ht_oper = NULL;
4618         const struct ieee80211_vht_operation *vht_oper = NULL;
4619         const struct ieee80211_he_operation *he_oper = NULL;
4620         struct ieee80211_supported_band *sband;
4621         struct cfg80211_chan_def chandef;
4622         int ret;
4623         u32 i;
4624         bool have_80mhz;
4625
4626         sband = local->hw.wiphy->bands[cbss->channel->band];
4627
4628         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4629                           IEEE80211_STA_DISABLE_80P80MHZ |
4630                           IEEE80211_STA_DISABLE_160MHZ);
4631
4632         rcu_read_lock();
4633
4634         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4635             sband->ht_cap.ht_supported) {
4636                 const u8 *ht_oper_ie, *ht_cap_ie;
4637
4638                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4639                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4640                         ht_oper = (void *)(ht_oper_ie + 2);
4641
4642                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4643                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4644                         ht_cap = (void *)(ht_cap_ie + 2);
4645
4646                 if (!ht_cap) {
4647                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4648                         ht_oper = NULL;
4649                 }
4650         }
4651
4652         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4653             sband->vht_cap.vht_supported) {
4654                 const u8 *vht_oper_ie, *vht_cap;
4655
4656                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4657                                                    WLAN_EID_VHT_OPERATION);
4658                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4659                         vht_oper = (void *)(vht_oper_ie + 2);
4660                 if (vht_oper && !ht_oper) {
4661                         vht_oper = NULL;
4662                         sdata_info(sdata,
4663                                    "AP advertised VHT without HT, disabling both\n");
4664                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4665                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4666                 }
4667
4668                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4669                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4670                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4671                         vht_oper = NULL;
4672                 }
4673         }
4674
4675         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
4676             ieee80211_get_he_sta_cap(sband)) {
4677                 const struct cfg80211_bss_ies *ies;
4678                 const u8 *he_oper_ie;
4679
4680                 ies = rcu_dereference(cbss->ies);
4681                 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4682                                                   ies->data, ies->len);
4683                 if (he_oper_ie &&
4684                     he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4685                         he_oper = (void *)(he_oper_ie + 3);
4686                 else
4687                         he_oper = NULL;
4688
4689                 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4690                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4691         }
4692
4693         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4694         have_80mhz = false;
4695         for (i = 0; i < sband->n_channels; i++) {
4696                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4697                                                 IEEE80211_CHAN_NO_80MHZ))
4698                         continue;
4699
4700                 have_80mhz = true;
4701                 break;
4702         }
4703
4704         if (!have_80mhz)
4705                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4706
4707         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4708                                                      cbss->channel,
4709                                                      ht_oper, vht_oper, he_oper,
4710                                                      &chandef, false);
4711
4712         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4713                                       local->rx_chains);
4714
4715         rcu_read_unlock();
4716
4717         /* will change later if needed */
4718         sdata->smps_mode = IEEE80211_SMPS_OFF;
4719
4720         mutex_lock(&local->mtx);
4721         /*
4722          * If this fails (possibly due to channel context sharing
4723          * on incompatible channels, e.g. 80+80 and 160 sharing the
4724          * same control channel) try to use a smaller bandwidth.
4725          */
4726         ret = ieee80211_vif_use_channel(sdata, &chandef,
4727                                         IEEE80211_CHANCTX_SHARED);
4728
4729         /* don't downgrade for 5 and 10 MHz channels, though. */
4730         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4731             chandef.width == NL80211_CHAN_WIDTH_10)
4732                 goto out;
4733
4734         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4735                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4736                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4737                                                 IEEE80211_CHANCTX_SHARED);
4738         }
4739  out:
4740         mutex_unlock(&local->mtx);
4741         return ret;
4742 }
4743
4744 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4745                                      struct cfg80211_bss *cbss, bool assoc,
4746                                      bool override)
4747 {
4748         struct ieee80211_local *local = sdata->local;
4749         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4750         struct ieee80211_bss *bss = (void *)cbss->priv;
4751         struct sta_info *new_sta = NULL;
4752         struct ieee80211_supported_band *sband;
4753         bool have_sta = false;
4754         int err;
4755
4756         sband = local->hw.wiphy->bands[cbss->channel->band];
4757
4758         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4759                 return -EINVAL;
4760
4761         /* If a reconfig is happening, bail out */
4762         if (local->in_reconfig)
4763                 return -EBUSY;
4764
4765         if (assoc) {
4766                 rcu_read_lock();
4767                 have_sta = sta_info_get(sdata, cbss->bssid);
4768                 rcu_read_unlock();
4769         }
4770
4771         if (!have_sta) {
4772                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4773                 if (!new_sta)
4774                         return -ENOMEM;
4775         }
4776
4777         /*
4778          * Set up the information for the new channel before setting the
4779          * new channel. We can't - completely race-free - change the basic
4780          * rates bitmap and the channel (sband) that it refers to, but if
4781          * we set it up before we at least avoid calling into the driver's
4782          * bss_info_changed() method with invalid information (since we do
4783          * call that from changing the channel - only for IDLE and perhaps
4784          * some others, but ...).
4785          *
4786          * So to avoid that, just set up all the new information before the
4787          * channel, but tell the driver to apply it only afterwards, since
4788          * it might need the new channel for that.
4789          */
4790         if (new_sta) {
4791                 u32 rates = 0, basic_rates = 0;
4792                 bool have_higher_than_11mbit;
4793                 int min_rate = INT_MAX, min_rate_index = -1;
4794                 const struct cfg80211_bss_ies *ies;
4795                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4796
4797                 ieee80211_get_rates(sband, bss->supp_rates,
4798                                     bss->supp_rates_len,
4799                                     &rates, &basic_rates,
4800                                     &have_higher_than_11mbit,
4801                                     &min_rate, &min_rate_index,
4802                                     shift);
4803
4804                 /*
4805                  * This used to be a workaround for basic rates missing
4806                  * in the association response frame. Now that we no
4807                  * longer use the basic rates from there, it probably
4808                  * doesn't happen any more, but keep the workaround so
4809                  * in case some *other* APs are buggy in different ways
4810                  * we can connect -- with a warning.
4811                  */
4812                 if (!basic_rates && min_rate_index >= 0) {
4813                         sdata_info(sdata,
4814                                    "No basic rates, using min rate instead\n");
4815                         basic_rates = BIT(min_rate_index);
4816                 }
4817
4818                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4819                 sdata->vif.bss_conf.basic_rates = basic_rates;
4820
4821                 /* cf. IEEE 802.11 9.2.12 */
4822                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4823                     have_higher_than_11mbit)
4824                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4825                 else
4826                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4827
4828                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4829
4830                 /* set timing information */
4831                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4832                 rcu_read_lock();
4833                 ies = rcu_dereference(cbss->beacon_ies);
4834                 if (ies) {
4835                         const u8 *tim_ie;
4836
4837                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4838                         sdata->vif.bss_conf.sync_device_ts =
4839                                 bss->device_ts_beacon;
4840                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4841                                                   ies->data, ies->len);
4842                         if (tim_ie && tim_ie[1] >= 2)
4843                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4844                         else
4845                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4846                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4847                                                TIMING_BEACON_ONLY)) {
4848                         ies = rcu_dereference(cbss->proberesp_ies);
4849                         /* must be non-NULL since beacon IEs were NULL */
4850                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4851                         sdata->vif.bss_conf.sync_device_ts =
4852                                 bss->device_ts_presp;
4853                         sdata->vif.bss_conf.sync_dtim_count = 0;
4854                 } else {
4855                         sdata->vif.bss_conf.sync_tsf = 0;
4856                         sdata->vif.bss_conf.sync_device_ts = 0;
4857                         sdata->vif.bss_conf.sync_dtim_count = 0;
4858                 }
4859                 rcu_read_unlock();
4860         }
4861
4862         if (new_sta || override) {
4863                 err = ieee80211_prep_channel(sdata, cbss);
4864                 if (err) {
4865                         if (new_sta)
4866                                 sta_info_free(local, new_sta);
4867                         return -EINVAL;
4868                 }
4869         }
4870
4871         if (new_sta) {
4872                 /*
4873                  * tell driver about BSSID, basic rates and timing
4874                  * this was set up above, before setting the channel
4875                  */
4876                 ieee80211_bss_info_change_notify(sdata,
4877                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4878                         BSS_CHANGED_BEACON_INT);
4879
4880                 if (assoc)
4881                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4882
4883                 err = sta_info_insert(new_sta);
4884                 new_sta = NULL;
4885                 if (err) {
4886                         sdata_info(sdata,
4887                                    "failed to insert STA entry for the AP (error %d)\n",
4888                                    err);
4889                         return err;
4890                 }
4891         } else
4892                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4893
4894         /* Cancel scan to ensure that nothing interferes with connection */
4895         if (local->scanning)
4896                 ieee80211_scan_cancel(local);
4897
4898         return 0;
4899 }
4900
4901 /* config hooks */
4902 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4903                        struct cfg80211_auth_request *req)
4904 {
4905         struct ieee80211_local *local = sdata->local;
4906         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4907         struct ieee80211_mgd_auth_data *auth_data;
4908         u16 auth_alg;
4909         int err;
4910         bool cont_auth;
4911
4912         /* prepare auth data structure */
4913
4914         switch (req->auth_type) {
4915         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4916                 auth_alg = WLAN_AUTH_OPEN;
4917                 break;
4918         case NL80211_AUTHTYPE_SHARED_KEY:
4919                 if (IS_ERR(local->wep_tx_tfm))
4920                         return -EOPNOTSUPP;
4921                 auth_alg = WLAN_AUTH_SHARED_KEY;
4922                 break;
4923         case NL80211_AUTHTYPE_FT:
4924                 auth_alg = WLAN_AUTH_FT;
4925                 break;
4926         case NL80211_AUTHTYPE_NETWORK_EAP:
4927                 auth_alg = WLAN_AUTH_LEAP;
4928                 break;
4929         case NL80211_AUTHTYPE_SAE:
4930                 auth_alg = WLAN_AUTH_SAE;
4931                 break;
4932         case NL80211_AUTHTYPE_FILS_SK:
4933                 auth_alg = WLAN_AUTH_FILS_SK;
4934                 break;
4935         case NL80211_AUTHTYPE_FILS_SK_PFS:
4936                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4937                 break;
4938         case NL80211_AUTHTYPE_FILS_PK:
4939                 auth_alg = WLAN_AUTH_FILS_PK;
4940                 break;
4941         default:
4942                 return -EOPNOTSUPP;
4943         }
4944
4945         if (ifmgd->assoc_data)
4946                 return -EBUSY;
4947
4948         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4949                             req->ie_len, GFP_KERNEL);
4950         if (!auth_data)
4951                 return -ENOMEM;
4952
4953         auth_data->bss = req->bss;
4954
4955         if (req->auth_data_len >= 4) {
4956                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4957                         __le16 *pos = (__le16 *) req->auth_data;
4958
4959                         auth_data->sae_trans = le16_to_cpu(pos[0]);
4960                         auth_data->sae_status = le16_to_cpu(pos[1]);
4961                 }
4962                 memcpy(auth_data->data, req->auth_data + 4,
4963                        req->auth_data_len - 4);
4964                 auth_data->data_len += req->auth_data_len - 4;
4965         }
4966
4967         /* Check if continuing authentication or trying to authenticate with the
4968          * same BSS that we were in the process of authenticating with and avoid
4969          * removal and re-addition of the STA entry in
4970          * ieee80211_prep_connection().
4971          */
4972         cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
4973
4974         if (req->ie && req->ie_len) {
4975                 memcpy(&auth_data->data[auth_data->data_len],
4976                        req->ie, req->ie_len);
4977                 auth_data->data_len += req->ie_len;
4978         }
4979
4980         if (req->key && req->key_len) {
4981                 auth_data->key_len = req->key_len;
4982                 auth_data->key_idx = req->key_idx;
4983                 memcpy(auth_data->key, req->key, req->key_len);
4984         }
4985
4986         auth_data->algorithm = auth_alg;
4987
4988         /* try to authenticate/probe */
4989
4990         if (ifmgd->auth_data) {
4991                 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
4992                         auth_data->peer_confirmed =
4993                                 ifmgd->auth_data->peer_confirmed;
4994                 }
4995                 ieee80211_destroy_auth_data(sdata, cont_auth);
4996         }
4997
4998         /* prep auth_data so we don't go into idle on disassoc */
4999         ifmgd->auth_data = auth_data;
5000
5001         /* If this is continuation of an ongoing SAE authentication exchange
5002          * (i.e., request to send SAE Confirm) and the peer has already
5003          * confirmed, mark authentication completed since we are about to send
5004          * out SAE Confirm.
5005          */
5006         if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5007             auth_data->peer_confirmed && auth_data->sae_trans == 2)
5008                 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5009
5010         if (ifmgd->associated) {
5011                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5012
5013                 sdata_info(sdata,
5014                            "disconnect from AP %pM for new auth to %pM\n",
5015                            ifmgd->associated->bssid, req->bss->bssid);
5016                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5017                                        WLAN_REASON_UNSPECIFIED,
5018                                        false, frame_buf);
5019
5020                 ieee80211_report_disconnect(sdata, frame_buf,
5021                                             sizeof(frame_buf), true,
5022                                             WLAN_REASON_UNSPECIFIED);
5023         }
5024
5025         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5026
5027         err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5028         if (err)
5029                 goto err_clear;
5030
5031         err = ieee80211_auth(sdata);
5032         if (err) {
5033                 sta_info_destroy_addr(sdata, req->bss->bssid);
5034                 goto err_clear;
5035         }
5036
5037         /* hold our own reference */
5038         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5039         return 0;
5040
5041  err_clear:
5042         eth_zero_addr(ifmgd->bssid);
5043         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5044         ifmgd->auth_data = NULL;
5045         mutex_lock(&sdata->local->mtx);
5046         ieee80211_vif_release_channel(sdata);
5047         mutex_unlock(&sdata->local->mtx);
5048         kfree(auth_data);
5049         return err;
5050 }
5051
5052 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5053                         struct cfg80211_assoc_request *req)
5054 {
5055         struct ieee80211_local *local = sdata->local;
5056         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5057         struct ieee80211_bss *bss = (void *)req->bss->priv;
5058         struct ieee80211_mgd_assoc_data *assoc_data;
5059         const struct cfg80211_bss_ies *beacon_ies;
5060         struct ieee80211_supported_band *sband;
5061         const u8 *ssidie, *ht_ie, *vht_ie;
5062         int i, err;
5063         bool override = false;
5064
5065         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5066         if (!assoc_data)
5067                 return -ENOMEM;
5068
5069         rcu_read_lock();
5070         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5071         if (!ssidie) {
5072                 rcu_read_unlock();
5073                 kfree(assoc_data);
5074                 return -EINVAL;
5075         }
5076         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5077         assoc_data->ssid_len = ssidie[1];
5078         rcu_read_unlock();
5079
5080         if (ifmgd->associated) {
5081                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5082
5083                 sdata_info(sdata,
5084                            "disconnect from AP %pM for new assoc to %pM\n",
5085                            ifmgd->associated->bssid, req->bss->bssid);
5086                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5087                                        WLAN_REASON_UNSPECIFIED,
5088                                        false, frame_buf);
5089
5090                 ieee80211_report_disconnect(sdata, frame_buf,
5091                                             sizeof(frame_buf), true,
5092                                             WLAN_REASON_UNSPECIFIED);
5093         }
5094
5095         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5096                 err = -EBUSY;
5097                 goto err_free;
5098         }
5099
5100         if (ifmgd->assoc_data) {
5101                 err = -EBUSY;
5102                 goto err_free;
5103         }
5104
5105         if (ifmgd->auth_data) {
5106                 bool match;
5107
5108                 /* keep sta info, bssid if matching */
5109                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5110                 ieee80211_destroy_auth_data(sdata, match);
5111         }
5112
5113         /* prepare assoc data */
5114
5115         ifmgd->beacon_crc_valid = false;
5116
5117         assoc_data->wmm = bss->wmm_used &&
5118                           (local->hw.queues >= IEEE80211_NUM_ACS);
5119
5120         /*
5121          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5122          * We still associate in non-HT mode (11a/b/g) if any one of these
5123          * ciphers is configured as pairwise.
5124          * We can set this to true for non-11n hardware, that'll be checked
5125          * separately along with the peer capabilities.
5126          */
5127         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5128                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5129                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5130                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5131                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5132                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5133                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5134                         netdev_info(sdata->dev,
5135                                     "disabling HE/HT/VHT due to WEP/TKIP use\n");
5136                 }
5137         }
5138
5139         /* Also disable HT if we don't support it or the AP doesn't use WMM */
5140         sband = local->hw.wiphy->bands[req->bss->channel->band];
5141         if (!sband->ht_cap.ht_supported ||
5142             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5143             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5144                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5145                 if (!bss->wmm_used &&
5146                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5147                         netdev_info(sdata->dev,
5148                                     "disabling HT as WMM/QoS is not supported by the AP\n");
5149         }
5150
5151         /* disable VHT if we don't support it or the AP doesn't use WMM */
5152         if (!sband->vht_cap.vht_supported ||
5153             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5154             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5155                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5156                 if (!bss->wmm_used &&
5157                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5158                         netdev_info(sdata->dev,
5159                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
5160         }
5161
5162         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5163         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5164                sizeof(ifmgd->ht_capa_mask));
5165
5166         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5167         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5168                sizeof(ifmgd->vht_capa_mask));
5169
5170         if (req->ie && req->ie_len) {
5171                 memcpy(assoc_data->ie, req->ie, req->ie_len);
5172                 assoc_data->ie_len = req->ie_len;
5173         }
5174
5175         if (req->fils_kek) {
5176                 /* should already be checked in cfg80211 - so warn */
5177                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5178                         err = -EINVAL;
5179                         goto err_free;
5180                 }
5181                 memcpy(assoc_data->fils_kek, req->fils_kek,
5182                        req->fils_kek_len);
5183                 assoc_data->fils_kek_len = req->fils_kek_len;
5184         }
5185
5186         if (req->fils_nonces)
5187                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5188                        2 * FILS_NONCE_LEN);
5189
5190         assoc_data->bss = req->bss;
5191
5192         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5193                 if (ifmgd->powersave)
5194                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5195                 else
5196                         sdata->smps_mode = IEEE80211_SMPS_OFF;
5197         } else
5198                 sdata->smps_mode = ifmgd->req_smps;
5199
5200         assoc_data->capability = req->bss->capability;
5201         assoc_data->supp_rates = bss->supp_rates;
5202         assoc_data->supp_rates_len = bss->supp_rates_len;
5203
5204         rcu_read_lock();
5205         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5206         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5207                 assoc_data->ap_ht_param =
5208                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5209         else
5210                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5211         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5212         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5213                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5214                        sizeof(struct ieee80211_vht_cap));
5215         else
5216                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5217         rcu_read_unlock();
5218
5219         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5220                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5221              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5222                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5223
5224         if (bss->wmm_used && bss->uapsd_supported &&
5225             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5226                 assoc_data->uapsd = true;
5227                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5228         } else {
5229                 assoc_data->uapsd = false;
5230                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5231         }
5232
5233         if (req->prev_bssid)
5234                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5235
5236         if (req->use_mfp) {
5237                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5238                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5239         } else {
5240                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5241                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5242         }
5243
5244         if (req->flags & ASSOC_REQ_USE_RRM)
5245                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5246         else
5247                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5248
5249         if (req->crypto.control_port)
5250                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5251         else
5252                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5253
5254         sdata->control_port_protocol = req->crypto.control_port_ethertype;
5255         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5256         sdata->control_port_over_nl80211 =
5257                                         req->crypto.control_port_over_nl80211;
5258         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5259                                                         sdata->vif.type);
5260
5261         /* kick off associate process */
5262
5263         ifmgd->assoc_data = assoc_data;
5264         ifmgd->dtim_period = 0;
5265         ifmgd->have_beacon = false;
5266
5267         /* override HT/VHT configuration only if the AP and we support it */
5268         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5269                 struct ieee80211_sta_ht_cap sta_ht_cap;
5270
5271                 if (req->flags & ASSOC_REQ_DISABLE_HT)
5272                         override = true;
5273
5274                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5275                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5276
5277                 /* check for 40 MHz disable override */
5278                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5279                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5280                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5281                         override = true;
5282
5283                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5284                     req->flags & ASSOC_REQ_DISABLE_VHT)
5285                         override = true;
5286         }
5287
5288         if (req->flags & ASSOC_REQ_DISABLE_HT) {
5289                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5290                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5291         }
5292
5293         if (req->flags & ASSOC_REQ_DISABLE_VHT)
5294                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5295
5296         err = ieee80211_prep_connection(sdata, req->bss, true, override);
5297         if (err)
5298                 goto err_clear;
5299
5300         rcu_read_lock();
5301         beacon_ies = rcu_dereference(req->bss->beacon_ies);
5302
5303         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5304             !beacon_ies) {
5305                 /*
5306                  * Wait up to one beacon interval ...
5307                  * should this be more if we miss one?
5308                  */
5309                 sdata_info(sdata, "waiting for beacon from %pM\n",
5310                            ifmgd->bssid);
5311                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5312                 assoc_data->timeout_started = true;
5313                 assoc_data->need_beacon = true;
5314         } else if (beacon_ies) {
5315                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
5316                                                     beacon_ies->data,
5317                                                     beacon_ies->len);
5318                 u8 dtim_count = 0;
5319
5320                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
5321                         const struct ieee80211_tim_ie *tim;
5322                         tim = (void *)(tim_ie + 2);
5323                         ifmgd->dtim_period = tim->dtim_period;
5324                         dtim_count = tim->dtim_count;
5325                 }
5326                 ifmgd->have_beacon = true;
5327                 assoc_data->timeout = jiffies;
5328                 assoc_data->timeout_started = true;
5329
5330                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5331                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5332                         sdata->vif.bss_conf.sync_device_ts =
5333                                 bss->device_ts_beacon;
5334                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5335                 }
5336         } else {
5337                 assoc_data->timeout = jiffies;
5338                 assoc_data->timeout_started = true;
5339         }
5340         rcu_read_unlock();
5341
5342         run_again(sdata, assoc_data->timeout);
5343
5344         if (bss->corrupt_data) {
5345                 char *corrupt_type = "data";
5346                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5347                         if (bss->corrupt_data &
5348                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
5349                                 corrupt_type = "beacon and probe response";
5350                         else
5351                                 corrupt_type = "beacon";
5352                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5353                         corrupt_type = "probe response";
5354                 sdata_info(sdata, "associating with AP with corrupt %s\n",
5355                            corrupt_type);
5356         }
5357
5358         return 0;
5359  err_clear:
5360         eth_zero_addr(ifmgd->bssid);
5361         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5362         ifmgd->assoc_data = NULL;
5363  err_free:
5364         kfree(assoc_data);
5365         return err;
5366 }
5367
5368 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5369                          struct cfg80211_deauth_request *req)
5370 {
5371         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5372         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5373         bool tx = !req->local_state_change;
5374
5375         if (ifmgd->auth_data &&
5376             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5377                 sdata_info(sdata,
5378                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5379                            req->bssid, req->reason_code,
5380                            ieee80211_get_reason_code_string(req->reason_code));
5381
5382                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5383                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5384                                                IEEE80211_STYPE_DEAUTH,
5385                                                req->reason_code, tx,
5386                                                frame_buf);
5387                 ieee80211_destroy_auth_data(sdata, false);
5388                 ieee80211_report_disconnect(sdata, frame_buf,
5389                                             sizeof(frame_buf), true,
5390                                             req->reason_code);
5391
5392                 return 0;
5393         }
5394
5395         if (ifmgd->assoc_data &&
5396             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5397                 sdata_info(sdata,
5398                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
5399                            req->bssid, req->reason_code,
5400                            ieee80211_get_reason_code_string(req->reason_code));
5401
5402                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5403                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5404                                                IEEE80211_STYPE_DEAUTH,
5405                                                req->reason_code, tx,
5406                                                frame_buf);
5407                 ieee80211_destroy_assoc_data(sdata, false, true);
5408                 ieee80211_report_disconnect(sdata, frame_buf,
5409                                             sizeof(frame_buf), true,
5410                                             req->reason_code);
5411                 return 0;
5412         }
5413
5414         if (ifmgd->associated &&
5415             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5416                 sdata_info(sdata,
5417                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5418                            req->bssid, req->reason_code,
5419                            ieee80211_get_reason_code_string(req->reason_code));
5420
5421                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5422                                        req->reason_code, tx, frame_buf);
5423                 ieee80211_report_disconnect(sdata, frame_buf,
5424                                             sizeof(frame_buf), true,
5425                                             req->reason_code);
5426                 return 0;
5427         }
5428
5429         return -ENOTCONN;
5430 }
5431
5432 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5433                            struct cfg80211_disassoc_request *req)
5434 {
5435         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5436         u8 bssid[ETH_ALEN];
5437         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5438
5439         /*
5440          * cfg80211 should catch this ... but it's racy since
5441          * we can receive a disassoc frame, process it, hand it
5442          * to cfg80211 while that's in a locked section already
5443          * trying to tell us that the user wants to disconnect.
5444          */
5445         if (ifmgd->associated != req->bss)
5446                 return -ENOLINK;
5447
5448         sdata_info(sdata,
5449                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5450                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5451
5452         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5453         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5454                                req->reason_code, !req->local_state_change,
5455                                frame_buf);
5456
5457         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5458                                     req->reason_code);
5459
5460         return 0;
5461 }
5462
5463 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5464 {
5465         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5466
5467         /*
5468          * Make sure some work items will not run after this,
5469          * they will not do anything but might not have been
5470          * cancelled when disconnecting.
5471          */
5472         cancel_work_sync(&ifmgd->monitor_work);
5473         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5474         cancel_work_sync(&ifmgd->request_smps_work);
5475         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5476         cancel_work_sync(&ifmgd->chswitch_work);
5477         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5478
5479         sdata_lock(sdata);
5480         if (ifmgd->assoc_data) {
5481                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5482                 ieee80211_destroy_assoc_data(sdata, false, false);
5483                 cfg80211_assoc_timeout(sdata->dev, bss);
5484         }
5485         if (ifmgd->auth_data)
5486                 ieee80211_destroy_auth_data(sdata, false);
5487         spin_lock_bh(&ifmgd->teardown_lock);
5488         if (ifmgd->teardown_skb) {
5489                 kfree_skb(ifmgd->teardown_skb);
5490                 ifmgd->teardown_skb = NULL;
5491                 ifmgd->orig_teardown_skb = NULL;
5492         }
5493         spin_unlock_bh(&ifmgd->teardown_lock);
5494         del_timer_sync(&ifmgd->timer);
5495         sdata_unlock(sdata);
5496 }
5497
5498 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5499                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5500                                s32 rssi_level,
5501                                gfp_t gfp)
5502 {
5503         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5504
5505         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5506
5507         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5508 }
5509 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5510
5511 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5512 {
5513         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5514
5515         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5516
5517         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5518 }
5519 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);