net/mac80211/mlme.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * BSS client mode implementation
   4  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   5  * Copyright 2004, Instant802 Networks, Inc.
   6  * Copyright 2005, Devicescape Software, Inc.
   7  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   8  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   9  * Copyright 2013-2014  Intel Mobile Communications GmbH
  10  * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
  11  * Copyright (C) 2018 - 2019 Intel Corporation
  12  */
  13
  14 #include <linux/delay.h>
  15 #include <linux/fips.h>
  16 #include <linux/if_ether.h>
  17 #include <linux/skbuff.h>
  18 #include <linux/if_arp.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/moduleparam.h>
  21 #include <linux/rtnetlink.h>
  22 #include <linux/crc32.h>
  23 #include <linux/slab.h>
  24 #include <linux/export.h>
  25 #include <net/mac80211.h>
  26 #include <asm/unaligned.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "led.h"
  32 #include "fils_aead.h"
  33
  34 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  35 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  36 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  37 #define IEEE80211_AUTH_TIMEOUT_SAE      (HZ * 2)
  38 #define IEEE80211_AUTH_MAX_TRIES        3
  39 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  40 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  41 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  42 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  43 #define IEEE80211_ASSOC_MAX_TRIES       3
  44
  45 static int max_nullfunc_tries = 2;
  46 module_param(max_nullfunc_tries, int, 0644);
  47 MODULE_PARM_DESC(max_nullfunc_tries,
  48                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  49
  50 static int max_probe_tries = 5;
  51 module_param(max_probe_tries, int, 0644);
  52 MODULE_PARM_DESC(max_probe_tries,
  53                  "Maximum probe tries before disconnecting (reason 4).");
  54
  55 /*
  56  * Beacon loss timeout is calculated as N frames times the
  57  * advertised beacon interval.  This may need to be somewhat
  58  * higher than what hardware might detect to account for
  59  * delays in the host processing frames. But since we also
  60  * probe on beacon miss before declaring the connection lost
  61  * default to what we want.
  62  */
  63 static int beacon_loss_count = 7;
  64 module_param(beacon_loss_count, int, 0644);
  65 MODULE_PARM_DESC(beacon_loss_count,
  66                  "Number of beacon intervals before we decide beacon was lost.");
  67
  68 /*
  69  * Time the connection can be idle before we probe
  70  * it to see if we can still talk to the AP.
  71  */
  72 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  73 /*
  74  * Time we wait for a probe response after sending
  75  * a probe request because of beacon loss or for
  76  * checking the connection still works.
  77  */
  78 static int probe_wait_ms = 500;
  79 module_param(probe_wait_ms, int, 0644);
  80 MODULE_PARM_DESC(probe_wait_ms,
  81                  "Maximum time(ms) to wait for probe response"
  82                  " before disconnecting (reason 4).");
  83
  84 /*
  85  * How many Beacon frames need to have been used in average signal strength
  86  * before starting to indicate signal change events.
  87  */
  88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  89
  90 /*
  91  * We can have multiple work items (and connection probing)
  92  * scheduling this timer, but we need to take care to only
  93  * reschedule it when it should fire _earlier_ than it was
  94  * asked for before, or if it's not pending right now. This
  95  * function ensures that. Note that it then is required to
  96  * run this function for all timeouts after the first one
  97  * has happened -- the work that runs from this timer will
  98  * do that.
  99  */
 100 static void run_again(struct ieee80211_sub_if_data *sdata,
 101                       unsigned long timeout)
 102 {
 103         sdata_assert_lock(sdata);
 104
 105         if (!timer_pending(&sdata->u.mgd.timer) ||
 106             time_before(timeout, sdata->u.mgd.timer.expires))
 107                 mod_timer(&sdata->u.mgd.timer, timeout);
 108 }
 109
 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 111 {
 112         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 113                 return;
 114
 115         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 116                 return;
 117
 118         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 119                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 120 }
 121
 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 123 {
 124         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 125
 126         if (unlikely(!ifmgd->associated))
 127                 return;
 128
 129         if (ifmgd->probe_send_count)
 130                 ifmgd->probe_send_count = 0;
 131
 132         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 133                 return;
 134
 135         mod_timer(&ifmgd->conn_mon_timer,
 136                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 137 }
 138
 139 static int ecw2cw(int ecw)
 140 {
 141         return (1 << ecw) - 1;
 142 }
 143
 144 static u32
 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 146                              struct ieee80211_supported_band *sband,
 147                              struct ieee80211_channel *channel,
 148                              const struct ieee80211_ht_operation *ht_oper,
 149                              const struct ieee80211_vht_operation *vht_oper,
 150                              const struct ieee80211_he_operation *he_oper,
 151                              struct cfg80211_chan_def *chandef, bool tracking)
 152 {
 153         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 154         struct cfg80211_chan_def vht_chandef;
 155         struct ieee80211_sta_ht_cap sta_ht_cap;
 156         u32 ht_cfreq, ret;
 157
 158         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 159         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 160
 161         memset(chandef, 0, sizeof(struct cfg80211_chan_def));
 162         chandef->chan = channel;
 163         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 164         chandef->center_freq1 = channel->center_freq;
 165
 166         if (!ht_oper || !sta_ht_cap.ht_supported) {
 167                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 168                 goto out;
 169         }
 170
 171         chandef->width = NL80211_CHAN_WIDTH_20;
 172
 173         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 174                                                   channel->band);
 175         /* check that channel matches the right operating channel */
 176         if (!tracking && channel->center_freq != ht_cfreq) {
 177                 /*
 178                  * It's possible that some APs are confused here;
 179                  * Netgear WNDR3700 sometimes reports 4 higher than
 180                  * the actual channel in association responses, but
 181                  * since we look at probe response/beacon data here
 182                  * it should be OK.
 183                  */
 184                 sdata_info(sdata,
 185                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 186                            channel->center_freq, ht_cfreq,
 187                            ht_oper->primary_chan, channel->band);
 188                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 189                 goto out;
 190         }
 191
 192         /* check 40 MHz support, if we have it */
 193         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 194                 ieee80211_chandef_ht_oper(ht_oper, chandef);
 195         } else {
 196                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 197                 ret = IEEE80211_STA_DISABLE_VHT;
 198                 /* also mark 40 MHz disabled */
 199                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 200                 goto out;
 201         }
 202
 203         if (!vht_oper || !sband->vht_cap.vht_supported) {
 204                 ret = IEEE80211_STA_DISABLE_VHT;
 205                 goto out;
 206         }
 207
 208         vht_chandef = *chandef;
 209         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
 210             (le32_to_cpu(he_oper->he_oper_params) &
 211              IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
 212                 struct ieee80211_vht_operation he_oper_vht_cap;
 213
 214                 /*
 215                  * Set only first 3 bytes (other 2 aren't used in
 216                  * ieee80211_chandef_vht_oper() anyway)
 217                  */
 218                 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
 219                 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
 220
 221                 if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
 222                                                 &he_oper_vht_cap, ht_oper,
 223                                                 &vht_chandef)) {
 224                         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
 225                                 sdata_info(sdata,
 226                                            "HE AP VHT information is invalid, disable HE\n");
 227                         ret = IEEE80211_STA_DISABLE_HE;
 228                         goto out;
 229                 }
 230         } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper,
 231                                                ht_oper, &vht_chandef)) {
 232                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 233                         sdata_info(sdata,
 234                                    "AP VHT information is invalid, disable VHT\n");
 235                 ret = IEEE80211_STA_DISABLE_VHT;
 236                 goto out;
 237         }
 238
 239         if (!cfg80211_chandef_valid(&vht_chandef)) {
 240                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 241                         sdata_info(sdata,
 242                                    "AP VHT information is invalid, disable VHT\n");
 243                 ret = IEEE80211_STA_DISABLE_VHT;
 244                 goto out;
 245         }
 246
 247         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 248                 ret = 0;
 249                 goto out;
 250         }
 251
 252         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 253                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 254                         sdata_info(sdata,
 255                                    "AP VHT information doesn't match HT, disable VHT\n");
 256                 ret = IEEE80211_STA_DISABLE_VHT;
 257                 goto out;
 258         }
 259
 260         *chandef = vht_chandef;
 261
 262         ret = 0;
 263
 264 out:
 265         /*
 266          * When tracking the current AP, don't do any further checks if the
 267          * new chandef is identical to the one we're currently using for the
 268          * connection. This keeps us from playing ping-pong with regulatory,
 269          * without it the following can happen (for example):
 270          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 271          *  - AP advertises regdom US
 272          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 273          *  - the code below detects an unsupported channel, downgrades, and
 274          *    we disconnect from the AP in the caller
 275          *  - disconnect causes CRDA to reload world regdomain and the game
 276          *    starts anew.
 277          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 278          *
 279          * It seems possible that there are still scenarios with CSA or real
 280          * bandwidth changes where a this could happen, but those cases are
 281          * less common and wouldn't completely prevent using the AP.
 282          */
 283         if (tracking &&
 284             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 285                 return ret;
 286
 287         /* don't print the message below for VHT mismatch if VHT is disabled */
 288         if (ret & IEEE80211_STA_DISABLE_VHT)
 289                 vht_chandef = *chandef;
 290
 291         /*
 292          * Ignore the DISABLED flag when we're already connected and only
 293          * tracking the APs beacon for bandwidth changes - otherwise we
 294          * might get disconnected here if we connect to an AP, update our
 295          * regulatory information based on the AP's country IE and the
 296          * information we have is wrong/outdated and disables the channel
 297          * that we're actually using for the connection to the AP.
 298          */
 299         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 300                                         tracking ? 0 :
 301                                                    IEEE80211_CHAN_DISABLED)) {
 302                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 303                         ret = IEEE80211_STA_DISABLE_HT |
 304                               IEEE80211_STA_DISABLE_VHT;
 305                         break;
 306                 }
 307
 308                 ret |= ieee80211_chandef_downgrade(chandef);
 309         }
 310
 311         if (chandef->width != vht_chandef.width && !tracking)
 312                 sdata_info(sdata,
 313                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 314
 315         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 316         return ret;
 317 }
 318
 319 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 320                                struct sta_info *sta,
 321                                const struct ieee80211_ht_cap *ht_cap,
 322                                const struct ieee80211_ht_operation *ht_oper,
 323                                const struct ieee80211_vht_operation *vht_oper,
 324                                const struct ieee80211_he_operation *he_oper,
 325                                const u8 *bssid, u32 *changed)
 326 {
 327         struct ieee80211_local *local = sdata->local;
 328         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 329         struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
 330         struct ieee80211_supported_band *sband =
 331                 local->hw.wiphy->bands[chan->band];
 332         struct cfg80211_chan_def chandef;
 333         u16 ht_opmode;
 334         u32 flags;
 335         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 336         int ret;
 337
 338         /* if HT was/is disabled, don't track any bandwidth changes */
 339         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 340                 return 0;
 341
 342         /* don't check VHT if we associated as non-VHT station */
 343         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 344                 vht_oper = NULL;
 345
 346         /* don't check HE if we associated as non-HE station */
 347         if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
 348             !ieee80211_get_he_sta_cap(sband))
 349                 he_oper = NULL;
 350
 351         if (WARN_ON_ONCE(!sta))
 352                 return -EINVAL;
 353
 354         /*
 355          * if bss configuration changed store the new one -
 356          * this may be applicable even if channel is identical
 357          */
 358         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 359         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 360                 *changed |= BSS_CHANGED_HT;
 361                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 362         }
 363
 364         /* calculate new channel (type) based on HT/VHT/HE operation IEs */
 365         flags = ieee80211_determine_chantype(sdata, sband, chan,
 366                                              ht_oper, vht_oper, he_oper,
 367                                              &chandef, true);
 368
 369         /*
 370          * Downgrade the new channel if we associated with restricted
 371          * capabilities. For example, if we associated as a 20 MHz STA
 372          * to a 40 MHz AP (due to regulatory, capabilities or config
 373          * reasons) then switching to a 40 MHz channel now won't do us
 374          * any good -- we couldn't use it with the AP.
 375          */
 376         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 377             chandef.width == NL80211_CHAN_WIDTH_80P80)
 378                 flags |= ieee80211_chandef_downgrade(&chandef);
 379         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 380             chandef.width == NL80211_CHAN_WIDTH_160)
 381                 flags |= ieee80211_chandef_downgrade(&chandef);
 382         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 383             chandef.width > NL80211_CHAN_WIDTH_20)
 384                 flags |= ieee80211_chandef_downgrade(&chandef);
 385
 386         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 387                 return 0;
 388
 389         sdata_info(sdata,
 390                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 391                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 392                    chandef.center_freq1, chandef.center_freq2);
 393
 394         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 395                                       IEEE80211_STA_DISABLE_VHT |
 396                                       IEEE80211_STA_DISABLE_40MHZ |
 397                                       IEEE80211_STA_DISABLE_80P80MHZ |
 398                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 399             !cfg80211_chandef_valid(&chandef)) {
 400                 sdata_info(sdata,
 401                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 402                            ifmgd->bssid);
 403                 return -EINVAL;
 404         }
 405
 406         switch (chandef.width) {
 407         case NL80211_CHAN_WIDTH_20_NOHT:
 408         case NL80211_CHAN_WIDTH_20:
 409                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 410                 break;
 411         case NL80211_CHAN_WIDTH_40:
 412                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 413                 break;
 414         case NL80211_CHAN_WIDTH_80:
 415                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 416                 break;
 417         case NL80211_CHAN_WIDTH_80P80:
 418         case NL80211_CHAN_WIDTH_160:
 419                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 420                 break;
 421         default:
 422                 return -EINVAL;
 423         }
 424
 425         if (new_sta_bw > sta->cur_max_bandwidth)
 426                 new_sta_bw = sta->cur_max_bandwidth;
 427
 428         if (new_sta_bw < sta->sta.bandwidth) {
 429                 sta->sta.bandwidth = new_sta_bw;
 430                 rate_control_rate_update(local, sband, sta,
 431                                          IEEE80211_RC_BW_CHANGED);
 432         }
 433
 434         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 435         if (ret) {
 436                 sdata_info(sdata,
 437                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 438                            ifmgd->bssid);
 439                 return ret;
 440         }
 441
 442         if (new_sta_bw > sta->sta.bandwidth) {
 443                 sta->sta.bandwidth = new_sta_bw;
 444                 rate_control_rate_update(local, sband, sta,
 445                                          IEEE80211_RC_BW_CHANGED);
 446         }
 447
 448         return 0;
 449 }
 450
 451 /* frame sending functions */
 452
 453 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 454                                 struct sk_buff *skb, u8 ap_ht_param,
 455                                 struct ieee80211_supported_band *sband,
 456                                 struct ieee80211_channel *channel,
 457                                 enum ieee80211_smps_mode smps)
 458 {
 459         u8 *pos;
 460         u32 flags = channel->flags;
 461         u16 cap;
 462         struct ieee80211_sta_ht_cap ht_cap;
 463
 464         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 465
 466         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 467         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 468
 469         /* determine capability flags */
 470         cap = ht_cap.cap;
 471
 472         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 473         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 474                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 475                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 476                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 477                 }
 478                 break;
 479         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 480                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 481                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 482                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 483                 }
 484                 break;
 485         }
 486
 487         /*
 488          * If 40 MHz was disabled associate as though we weren't
 489          * capable of 40 MHz -- some broken APs will never fall
 490          * back to trying to transmit in 20 MHz.
 491          */
 492         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 493                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 494                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 495         }
 496
 497         /* set SM PS mode properly */
 498         cap &= ~IEEE80211_HT_CAP_SM_PS;
 499         switch (smps) {
 500         case IEEE80211_SMPS_AUTOMATIC:
 501         case IEEE80211_SMPS_NUM_MODES:
 502                 WARN_ON(1);
 503                 /* fall through */
 504         case IEEE80211_SMPS_OFF:
 505                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 506                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 507                 break;
 508         case IEEE80211_SMPS_STATIC:
 509                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 510                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 511                 break;
 512         case IEEE80211_SMPS_DYNAMIC:
 513                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 514                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 515                 break;
 516         }
 517
 518         /* reserve and fill IE */
 519         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 520         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 521 }
 522
 523 /* This function determines vht capability flags for the association
 524  * and builds the IE.
 525  * Note - the function may set the owner of the MU-MIMO capability
 526  */
 527 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 528                                  struct sk_buff *skb,
 529                                  struct ieee80211_supported_band *sband,
 530                                  struct ieee80211_vht_cap *ap_vht_cap)
 531 {
 532         struct ieee80211_local *local = sdata->local;
 533         u8 *pos;
 534         u32 cap;
 535         struct ieee80211_sta_vht_cap vht_cap;
 536         u32 mask, ap_bf_sts, our_bf_sts;
 537
 538         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 539
 540         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 541         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 542
 543         /* determine capability flags */
 544         cap = vht_cap.cap;
 545
 546         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 547                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 548
 549                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 550                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 551                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 552                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 553         }
 554
 555         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 556                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 557                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 558         }
 559
 560         /*
 561          * Some APs apparently get confused if our capabilities are better
 562          * than theirs, so restrict what we advertise in the assoc request.
 563          */
 564         if (!(ap_vht_cap->vht_cap_info &
 565                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 566                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 567                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 568         else if (!(ap_vht_cap->vht_cap_info &
 569                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 570                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 571
 572         /*
 573          * If some other vif is using the MU-MIMO capablity we cannot associate
 574          * using MU-MIMO - this will lead to contradictions in the group-id
 575          * mechanism.
 576          * Ownership is defined since association request, in order to avoid
 577          * simultaneous associations with MU-MIMO.
 578          */
 579         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 580                 bool disable_mu_mimo = false;
 581                 struct ieee80211_sub_if_data *other;
 582
 583                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 584                         if (other->vif.mu_mimo_owner) {
 585                                 disable_mu_mimo = true;
 586                                 break;
 587                         }
 588                 }
 589                 if (disable_mu_mimo)
 590                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 591                 else
 592                         sdata->vif.mu_mimo_owner = true;
 593         }
 594
 595         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 596
 597         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 598         our_bf_sts = cap & mask;
 599
 600         if (ap_bf_sts < our_bf_sts) {
 601                 cap &= ~mask;
 602                 cap |= ap_bf_sts;
 603         }
 604
 605         /* reserve and fill IE */
 606         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 607         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 608 }
 609
 610 /* This function determines HE capability flags for the association
 611  * and builds the IE.
 612  */
 613 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
 614                                 struct sk_buff *skb,
 615                                 struct ieee80211_supported_band *sband)
 616 {
 617         u8 *pos;
 618         const struct ieee80211_sta_he_cap *he_cap = NULL;
 619         u8 he_cap_size;
 620
 621         he_cap = ieee80211_get_he_sta_cap(sband);
 622         if (!he_cap)
 623                 return;
 624
 625         /*
 626          * TODO: the 1 added is because this temporarily is under the EXTENSION
 627          * IE. Get rid of it when it moves.
 628          */
 629         he_cap_size =
 630                 2 + 1 + sizeof(he_cap->he_cap_elem) +
 631                 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
 632                 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
 633                                       he_cap->he_cap_elem.phy_cap_info);
 634         pos = skb_put(skb, he_cap_size);
 635         ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
 636 }
 637
 638 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 639 {
 640         struct ieee80211_local *local = sdata->local;
 641         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 642         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 643         struct sk_buff *skb;
 644         struct ieee80211_mgmt *mgmt;
 645         u8 *pos, qos_info, *ie_start;
 646         size_t offset = 0, noffset;
 647         int i, count, rates_len, supp_rates_len, shift;
 648         u16 capab;
 649         struct ieee80211_supported_band *sband;
 650         struct ieee80211_chanctx_conf *chanctx_conf;
 651         struct ieee80211_channel *chan;
 652         u32 rates = 0;
 653
 654         sdata_assert_lock(sdata);
 655
 656         rcu_read_lock();
 657         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 658         if (WARN_ON(!chanctx_conf)) {
 659                 rcu_read_unlock();
 660                 return;
 661         }
 662         chan = chanctx_conf->def.chan;
 663         rcu_read_unlock();
 664         sband = local->hw.wiphy->bands[chan->band];
 665         shift = ieee80211_vif_get_shift(&sdata->vif);
 666
 667         if (assoc_data->supp_rates_len) {
 668                 /*
 669                  * Get all rates supported by the device and the AP as
 670                  * some APs don't like getting a superset of their rates
 671                  * in the association request (e.g. D-Link DAP 1353 in
 672                  * b-only mode)...
 673                  */
 674                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 675                                                      assoc_data->supp_rates,
 676                                                      assoc_data->supp_rates_len,
 677                                                      &rates);
 678         } else {
 679                 /*
 680                  * In case AP not provide any supported rates information
 681                  * before association, we send information element(s) with
 682                  * all rates that we support.
 683                  */
 684                 rates_len = 0;
 685                 for (i = 0; i < sband->n_bitrates; i++) {
 686                         rates |= BIT(i);
 687                         rates_len++;
 688                 }
 689         }
 690
 691         skb = alloc_skb(local->hw.extra_tx_headroom +
 692                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 693                         2 + assoc_data->ssid_len + /* SSID */
 694                         4 + rates_len + /* (extended) rates */
 695                         4 + /* power capability */
 696                         2 + 2 * sband->n_channels + /* supported channels */
 697                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 698                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 699                         2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
 700                                 sizeof(struct ieee80211_he_mcs_nss_supp) +
 701                                 IEEE80211_HE_PPE_THRES_MAX_LEN +
 702                         assoc_data->ie_len + /* extra IEs */
 703                         (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
 704                         9, /* WMM */
 705                         GFP_KERNEL);
 706         if (!skb)
 707                 return;
 708
 709         skb_reserve(skb, local->hw.extra_tx_headroom);
 710
 711         capab = WLAN_CAPABILITY_ESS;
 712
 713         if (sband->band == NL80211_BAND_2GHZ) {
 714                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 715                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 716         }
 717
 718         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 719                 capab |= WLAN_CAPABILITY_PRIVACY;
 720
 721         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 722             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 723                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 724
 725         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 726                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 727
 728         mgmt = skb_put_zero(skb, 24);
 729         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 730         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 731         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 732
 733         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 734                 skb_put(skb, 10);
 735                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 736                                                   IEEE80211_STYPE_REASSOC_REQ);
 737                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 738                 mgmt->u.reassoc_req.listen_interval =
 739                                 cpu_to_le16(local->hw.conf.listen_interval);
 740                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 741                        ETH_ALEN);
 742         } else {
 743                 skb_put(skb, 4);
 744                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 745                                                   IEEE80211_STYPE_ASSOC_REQ);
 746                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 747                 mgmt->u.assoc_req.listen_interval =
 748                                 cpu_to_le16(local->hw.conf.listen_interval);
 749         }
 750
 751         /* SSID */
 752         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 753         ie_start = pos;
 754         *pos++ = WLAN_EID_SSID;
 755         *pos++ = assoc_data->ssid_len;
 756         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 757
 758         /* add all rates which were marked to be used above */
 759         supp_rates_len = rates_len;
 760         if (supp_rates_len > 8)
 761                 supp_rates_len = 8;
 762
 763         pos = skb_put(skb, supp_rates_len + 2);
 764         *pos++ = WLAN_EID_SUPP_RATES;
 765         *pos++ = supp_rates_len;
 766
 767         count = 0;
 768         for (i = 0; i < sband->n_bitrates; i++) {
 769                 if (BIT(i) & rates) {
 770                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 771                                                 5 * (1 << shift));
 772                         *pos++ = (u8) rate;
 773                         if (++count == 8)
 774                                 break;
 775                 }
 776         }
 777
 778         if (rates_len > count) {
 779                 pos = skb_put(skb, rates_len - count + 2);
 780                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 781                 *pos++ = rates_len - count;
 782
 783                 for (i++; i < sband->n_bitrates; i++) {
 784                         if (BIT(i) & rates) {
 785                                 int rate;
 786                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 787                                                     5 * (1 << shift));
 788                                 *pos++ = (u8) rate;
 789                         }
 790                 }
 791         }
 792
 793         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 794             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 795                 pos = skb_put(skb, 4);
 796                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 797                 *pos++ = 2;
 798                 *pos++ = 0; /* min tx power */
 799                  /* max tx power */
 800                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 801         }
 802
 803         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 804                 /* TODO: get this in reg domain format */
 805                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 806                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 807                 *pos++ = 2 * sband->n_channels;
 808                 for (i = 0; i < sband->n_channels; i++) {
 809                         *pos++ = ieee80211_frequency_to_channel(
 810                                         sband->channels[i].center_freq);
 811                         *pos++ = 1; /* one channel in the subband*/
 812                 }
 813         }
 814
 815         /* Set MBSSID support for HE AP if needed */
 816         if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
 817             !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len) {
 818                 struct element *elem;
 819
 820                 /* we know it's writable, cast away the const */
 821                 elem = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
 822                                                   assoc_data->ie,
 823                                                   assoc_data->ie_len);
 824
 825                 /* We can probably assume both always true */
 826                 if (elem && elem->datalen >= 3)
 827                         elem->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
 828         }
 829
 830         /* if present, add any custom IEs that go before HT */
 831         if (assoc_data->ie_len) {
 832                 static const u8 before_ht[] = {
 833                         WLAN_EID_SSID,
 834                         WLAN_EID_SUPP_RATES,
 835                         WLAN_EID_EXT_SUPP_RATES,
 836                         WLAN_EID_PWR_CAPABILITY,
 837                         WLAN_EID_SUPPORTED_CHANNELS,
 838                         WLAN_EID_RSN,
 839                         WLAN_EID_QOS_CAPA,
 840                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 841                         WLAN_EID_MOBILITY_DOMAIN,
 842                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 843                         WLAN_EID_RIC_DATA,              /* reassoc only */
 844                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 845                 };
 846                 static const u8 after_ric[] = {
 847                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 848                         WLAN_EID_HT_CAPABILITY,
 849                         WLAN_EID_BSS_COEX_2040,
 850                         /* luckily this is almost always there */
 851                         WLAN_EID_EXT_CAPABILITY,
 852                         WLAN_EID_QOS_TRAFFIC_CAPA,
 853                         WLAN_EID_TIM_BCAST_REQ,
 854                         WLAN_EID_INTERWORKING,
 855                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
 856                         WLAN_EID_VHT_CAPABILITY,
 857                         WLAN_EID_OPMODE_NOTIF,
 858                 };
 859
 860                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 861                                                  assoc_data->ie_len,
 862                                                  before_ht,
 863                                                  ARRAY_SIZE(before_ht),
 864                                                  after_ric,
 865                                                  ARRAY_SIZE(after_ric),
 866                                                  offset);
 867                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 868                 offset = noffset;
 869         }
 870
 871         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 872                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 873                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 874
 875         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 876                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 877                                     sband, chan, sdata->smps_mode);
 878
 879         /* if present, add any custom IEs that go before VHT */
 880         if (assoc_data->ie_len) {
 881                 static const u8 before_vht[] = {
 882                         /*
 883                          * no need to list the ones split off before HT
 884                          * or generated here
 885                          */
 886                         WLAN_EID_BSS_COEX_2040,
 887                         WLAN_EID_EXT_CAPABILITY,
 888                         WLAN_EID_QOS_TRAFFIC_CAPA,
 889                         WLAN_EID_TIM_BCAST_REQ,
 890                         WLAN_EID_INTERWORKING,
 891                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
 892                 };
 893
 894                 /* RIC already taken above, so no need to handle here anymore */
 895                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 896                                              before_vht, ARRAY_SIZE(before_vht),
 897                                              offset);
 898                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 899                 offset = noffset;
 900         }
 901
 902         /* if present, add any custom IEs that go before HE */
 903         if (assoc_data->ie_len) {
 904                 static const u8 before_he[] = {
 905                         /*
 906                          * no need to list the ones split off before VHT
 907                          * or generated here
 908                          */
 909                         WLAN_EID_OPMODE_NOTIF,
 910                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
 911                         /* 11ai elements */
 912                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
 913                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
 914                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
 915                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
 916                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
 917                         /* TODO: add 11ah/11aj/11ak elements */
 918                 };
 919
 920                 /* RIC already taken above, so no need to handle here anymore */
 921                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 922                                              before_he, ARRAY_SIZE(before_he),
 923                                              offset);
 924                 pos = skb_put(skb, noffset - offset);
 925                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 926                 offset = noffset;
 927         }
 928
 929         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 930                 ieee80211_add_vht_ie(sdata, skb, sband,
 931                                      &assoc_data->ap_vht_cap);
 932
 933         /*
 934          * If AP doesn't support HT, mark HE as disabled.
 935          * If on the 5GHz band, make sure it supports VHT.
 936          */
 937         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
 938             (sband->band == NL80211_BAND_5GHZ &&
 939              ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 940                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
 941
 942         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
 943                 ieee80211_add_he_ie(sdata, skb, sband);
 944
 945         /* if present, add any custom non-vendor IEs that go after HE */
 946         if (assoc_data->ie_len) {
 947                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 948                                                     assoc_data->ie_len,
 949                                                     offset);
 950                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 951                 offset = noffset;
 952         }
 953
 954         if (assoc_data->wmm) {
 955                 if (assoc_data->uapsd) {
 956                         qos_info = ifmgd->uapsd_queues;
 957                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 958                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 959                 } else {
 960                         qos_info = 0;
 961                 }
 962
 963                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 964         }
 965
 966         /* add any remaining custom (i.e. vendor specific here) IEs */
 967         if (assoc_data->ie_len) {
 968                 noffset = assoc_data->ie_len;
 969                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 970         }
 971
 972         if (assoc_data->fils_kek_len &&
 973             fils_encrypt_assoc_req(skb, assoc_data) < 0) {
 974                 dev_kfree_skb(skb);
 975                 return;
 976         }
 977
 978         pos = skb_tail_pointer(skb);
 979         kfree(ifmgd->assoc_req_ies);
 980         ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
 981         ifmgd->assoc_req_ies_len = pos - ie_start;
 982
 983         drv_mgd_prepare_tx(local, sdata, 0);
 984
 985         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 986         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 987                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 988                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 989         ieee80211_tx_skb(sdata, skb);
 990 }
 991
 992 void ieee80211_send_pspoll(struct ieee80211_local *local,
 993                            struct ieee80211_sub_if_data *sdata)
 994 {
 995         struct ieee80211_pspoll *pspoll;
 996         struct sk_buff *skb;
 997
 998         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 999         if (!skb)
1000                 return;
1001
1002         pspoll = (struct ieee80211_pspoll *) skb->data;
1003         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1004
1005         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1006         ieee80211_tx_skb(sdata, skb);
1007 }
1008
1009 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1010                              struct ieee80211_sub_if_data *sdata,
1011                              bool powersave)
1012 {
1013         struct sk_buff *skb;
1014         struct ieee80211_hdr_3addr *nullfunc;
1015         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1016
1017         /* Don't send NDPs when STA is connected HE */
1018         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1019             !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
1020                 return;
1021
1022         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
1023                 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1024         if (!skb)
1025                 return;
1026
1027         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1028         if (powersave)
1029                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1030
1031         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1032                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1033
1034         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1035                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1036
1037         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1038                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1039
1040         ieee80211_tx_skb(sdata, skb);
1041 }
1042
1043 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1044                                           struct ieee80211_sub_if_data *sdata)
1045 {
1046         struct sk_buff *skb;
1047         struct ieee80211_hdr *nullfunc;
1048         __le16 fc;
1049
1050         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1051                 return;
1052
1053         /* Don't send NDPs when connected HE */
1054         if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1055                 return;
1056
1057         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1058         if (!skb)
1059                 return;
1060
1061         skb_reserve(skb, local->hw.extra_tx_headroom);
1062
1063         nullfunc = skb_put_zero(skb, 30);
1064         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1065                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1066         nullfunc->frame_control = fc;
1067         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1068         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1069         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1070         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1071
1072         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1073         ieee80211_tx_skb(sdata, skb);
1074 }
1075
1076 /* spectrum management related things */
1077 static void ieee80211_chswitch_work(struct work_struct *work)
1078 {
1079         struct ieee80211_sub_if_data *sdata =
1080                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1081         struct ieee80211_local *local = sdata->local;
1082         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1083         int ret;
1084
1085         if (!ieee80211_sdata_running(sdata))
1086                 return;
1087
1088         sdata_lock(sdata);
1089         mutex_lock(&local->mtx);
1090         mutex_lock(&local->chanctx_mtx);
1091
1092         if (!ifmgd->associated)
1093                 goto out;
1094
1095         if (!sdata->vif.csa_active)
1096                 goto out;
1097
1098         /*
1099          * using reservation isn't immediate as it may be deferred until later
1100          * with multi-vif. once reservation is complete it will re-schedule the
1101          * work with no reserved_chanctx so verify chandef to check if it
1102          * completed successfully
1103          */
1104
1105         if (sdata->reserved_chanctx) {
1106                 struct ieee80211_supported_band *sband = NULL;
1107                 struct sta_info *mgd_sta = NULL;
1108                 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1109
1110                 /*
1111                  * with multi-vif csa driver may call ieee80211_csa_finish()
1112                  * many times while waiting for other interfaces to use their
1113                  * reservations
1114                  */
1115                 if (sdata->reserved_ready)
1116                         goto out;
1117
1118                 if (sdata->vif.bss_conf.chandef.width !=
1119                     sdata->csa_chandef.width) {
1120                         /*
1121                          * For managed interface, we need to also update the AP
1122                          * station bandwidth and align the rate scale algorithm
1123                          * on the bandwidth change. Here we only consider the
1124                          * bandwidth of the new channel definition (as channel
1125                          * switch flow does not have the full HT/VHT/HE
1126                          * information), assuming that if additional changes are
1127                          * required they would be done as part of the processing
1128                          * of the next beacon from the AP.
1129                          */
1130                         switch (sdata->csa_chandef.width) {
1131                         case NL80211_CHAN_WIDTH_20_NOHT:
1132                         case NL80211_CHAN_WIDTH_20:
1133                         default:
1134                                 bw = IEEE80211_STA_RX_BW_20;
1135                                 break;
1136                         case NL80211_CHAN_WIDTH_40:
1137                                 bw = IEEE80211_STA_RX_BW_40;
1138                                 break;
1139                         case NL80211_CHAN_WIDTH_80:
1140                                 bw = IEEE80211_STA_RX_BW_80;
1141                                 break;
1142                         case NL80211_CHAN_WIDTH_80P80:
1143                         case NL80211_CHAN_WIDTH_160:
1144                                 bw = IEEE80211_STA_RX_BW_160;
1145                                 break;
1146                         }
1147
1148                         mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1149                         sband =
1150                                 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1151                 }
1152
1153                 if (sdata->vif.bss_conf.chandef.width >
1154                     sdata->csa_chandef.width) {
1155                         mgd_sta->sta.bandwidth = bw;
1156                         rate_control_rate_update(local, sband, mgd_sta,
1157                                                  IEEE80211_RC_BW_CHANGED);
1158                 }
1159
1160                 ret = ieee80211_vif_use_reserved_context(sdata);
1161                 if (ret) {
1162                         sdata_info(sdata,
1163                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1164                                    ret);
1165                         ieee80211_queue_work(&sdata->local->hw,
1166                                              &ifmgd->csa_connection_drop_work);
1167                         goto out;
1168                 }
1169
1170                 if (sdata->vif.bss_conf.chandef.width <
1171                     sdata->csa_chandef.width) {
1172                         mgd_sta->sta.bandwidth = bw;
1173                         rate_control_rate_update(local, sband, mgd_sta,
1174                                                  IEEE80211_RC_BW_CHANGED);
1175                 }
1176
1177                 goto out;
1178         }
1179
1180         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1181                                         &sdata->csa_chandef)) {
1182                 sdata_info(sdata,
1183                            "failed to finalize channel switch, disconnecting\n");
1184                 ieee80211_queue_work(&sdata->local->hw,
1185                                      &ifmgd->csa_connection_drop_work);
1186                 goto out;
1187         }
1188
1189         ifmgd->csa_waiting_bcn = true;
1190
1191         ieee80211_sta_reset_beacon_monitor(sdata);
1192         ieee80211_sta_reset_conn_monitor(sdata);
1193
1194 out:
1195         mutex_unlock(&local->chanctx_mtx);
1196         mutex_unlock(&local->mtx);
1197         sdata_unlock(sdata);
1198 }
1199
1200 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1201 {
1202         struct ieee80211_local *local = sdata->local;
1203         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1204         int ret;
1205
1206         sdata_assert_lock(sdata);
1207
1208         WARN_ON(!sdata->vif.csa_active);
1209
1210         if (sdata->csa_block_tx) {
1211                 ieee80211_wake_vif_queues(local, sdata,
1212                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1213                 sdata->csa_block_tx = false;
1214         }
1215
1216         sdata->vif.csa_active = false;
1217         ifmgd->csa_waiting_bcn = false;
1218
1219         ret = drv_post_channel_switch(sdata);
1220         if (ret) {
1221                 sdata_info(sdata,
1222                            "driver post channel switch failed, disconnecting\n");
1223                 ieee80211_queue_work(&local->hw,
1224                                      &ifmgd->csa_connection_drop_work);
1225                 return;
1226         }
1227
1228         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1229 }
1230
1231 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1232 {
1233         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1234         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1235
1236         trace_api_chswitch_done(sdata, success);
1237         if (!success) {
1238                 sdata_info(sdata,
1239                            "driver channel switch failed, disconnecting\n");
1240                 ieee80211_queue_work(&sdata->local->hw,
1241                                      &ifmgd->csa_connection_drop_work);
1242         } else {
1243                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1244         }
1245 }
1246 EXPORT_SYMBOL(ieee80211_chswitch_done);
1247
1248 static void ieee80211_chswitch_timer(struct timer_list *t)
1249 {
1250         struct ieee80211_sub_if_data *sdata =
1251                 from_timer(sdata, t, u.mgd.chswitch_timer);
1252
1253         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1254 }
1255
1256 static void
1257 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata)
1258 {
1259         struct ieee80211_local *local = sdata->local;
1260
1261         if (!local->ops->abort_channel_switch)
1262                 return;
1263
1264         mutex_lock(&local->mtx);
1265
1266         mutex_lock(&local->chanctx_mtx);
1267         ieee80211_vif_unreserve_chanctx(sdata);
1268         mutex_unlock(&local->chanctx_mtx);
1269
1270         if (sdata->csa_block_tx)
1271                 ieee80211_wake_vif_queues(local, sdata,
1272                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1273
1274         sdata->csa_block_tx = false;
1275         sdata->vif.csa_active = false;
1276
1277         mutex_unlock(&local->mtx);
1278
1279         drv_abort_channel_switch(sdata);
1280 }
1281
1282 static void
1283 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1284                                  u64 timestamp, u32 device_timestamp,
1285                                  struct ieee802_11_elems *elems,
1286                                  bool beacon)
1287 {
1288         struct ieee80211_local *local = sdata->local;
1289         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1290         struct cfg80211_bss *cbss = ifmgd->associated;
1291         struct ieee80211_chanctx_conf *conf;
1292         struct ieee80211_chanctx *chanctx;
1293         enum nl80211_band current_band;
1294         struct ieee80211_csa_ie csa_ie;
1295         struct ieee80211_channel_switch ch_switch;
1296         int res;
1297
1298         sdata_assert_lock(sdata);
1299
1300         if (!cbss)
1301                 return;
1302
1303         if (local->scanning)
1304                 return;
1305
1306         current_band = cbss->channel->band;
1307         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1308                                            ifmgd->flags,
1309                                            ifmgd->associated->bssid, &csa_ie);
1310
1311         if (!res) {
1312                 ch_switch.timestamp = timestamp;
1313                 ch_switch.device_timestamp = device_timestamp;
1314                 ch_switch.block_tx =  beacon ? csa_ie.mode : 0;
1315                 ch_switch.chandef = csa_ie.chandef;
1316                 ch_switch.count = csa_ie.count;
1317                 ch_switch.delay = csa_ie.max_switch_time;
1318         }
1319
1320         if (res < 0) {
1321                 ieee80211_queue_work(&local->hw,
1322                                      &ifmgd->csa_connection_drop_work);
1323                 return;
1324         }
1325
1326         if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) {
1327                 if (res)
1328                         ieee80211_sta_abort_chanswitch(sdata);
1329                 else
1330                         drv_channel_switch_rx_beacon(sdata, &ch_switch);
1331                 return;
1332         } else if (sdata->vif.csa_active || res) {
1333                 /* disregard subsequent announcements if already processing */
1334                 return;
1335         }
1336
1337         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1338                                      IEEE80211_CHAN_DISABLED)) {
1339                 sdata_info(sdata,
1340                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1341                            ifmgd->associated->bssid,
1342                            csa_ie.chandef.chan->center_freq,
1343                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1344                            csa_ie.chandef.center_freq2);
1345                 ieee80211_queue_work(&local->hw,
1346                                      &ifmgd->csa_connection_drop_work);
1347                 return;
1348         }
1349
1350         if (cfg80211_chandef_identical(&csa_ie.chandef,
1351                                        &sdata->vif.bss_conf.chandef) &&
1352             (!csa_ie.mode || !beacon)) {
1353                 if (ifmgd->csa_ignored_same_chan)
1354                         return;
1355                 sdata_info(sdata,
1356                            "AP %pM tries to chanswitch to same channel, ignore\n",
1357                            ifmgd->associated->bssid);
1358                 ifmgd->csa_ignored_same_chan = true;
1359                 return;
1360         }
1361
1362         /*
1363          * Drop all TDLS peers - either we disconnect or move to a different
1364          * channel from this point on. There's no telling what our peer will do.
1365          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1366          * have an incompatible wider chandef.
1367          */
1368         ieee80211_teardown_tdls_peers(sdata);
1369
1370         mutex_lock(&local->mtx);
1371         mutex_lock(&local->chanctx_mtx);
1372         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1373                                          lockdep_is_held(&local->chanctx_mtx));
1374         if (!conf) {
1375                 sdata_info(sdata,
1376                            "no channel context assigned to vif?, disconnecting\n");
1377                 goto drop_connection;
1378         }
1379
1380         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1381
1382         if (local->use_chanctx &&
1383             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1384                 sdata_info(sdata,
1385                            "driver doesn't support chan-switch with channel contexts\n");
1386                 goto drop_connection;
1387         }
1388
1389         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1390                 sdata_info(sdata,
1391                            "preparing for channel switch failed, disconnecting\n");
1392                 goto drop_connection;
1393         }
1394
1395         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1396                                             chanctx->mode, false);
1397         if (res) {
1398                 sdata_info(sdata,
1399                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1400                            res);
1401                 goto drop_connection;
1402         }
1403         mutex_unlock(&local->chanctx_mtx);
1404
1405         sdata->vif.csa_active = true;
1406         sdata->csa_chandef = csa_ie.chandef;
1407         sdata->csa_block_tx = ch_switch.block_tx;
1408         ifmgd->csa_ignored_same_chan = false;
1409
1410         if (sdata->csa_block_tx)
1411                 ieee80211_stop_vif_queues(local, sdata,
1412                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1413         mutex_unlock(&local->mtx);
1414
1415         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1416                                           csa_ie.count);
1417
1418         if (local->ops->channel_switch) {
1419                 /* use driver's channel switch callback */
1420                 drv_channel_switch(local, sdata, &ch_switch);
1421                 return;
1422         }
1423
1424         /* channel switch handled in software */
1425         if (csa_ie.count <= 1)
1426                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1427         else
1428                 mod_timer(&ifmgd->chswitch_timer,
1429                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1430                                          cbss->beacon_interval));
1431         return;
1432  drop_connection:
1433         /*
1434          * This is just so that the disconnect flow will know that
1435          * we were trying to switch channel and failed. In case the
1436          * mode is 1 (we are not allowed to Tx), we will know not to
1437          * send a deauthentication frame. Those two fields will be
1438          * reset when the disconnection worker runs.
1439          */
1440         sdata->vif.csa_active = true;
1441         sdata->csa_block_tx = ch_switch.block_tx;
1442
1443         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1444         mutex_unlock(&local->chanctx_mtx);
1445         mutex_unlock(&local->mtx);
1446 }
1447
1448 static bool
1449 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1450                                  struct ieee80211_channel *channel,
1451                                  const u8 *country_ie, u8 country_ie_len,
1452                                  const u8 *pwr_constr_elem,
1453                                  int *chan_pwr, int *pwr_reduction)
1454 {
1455         struct ieee80211_country_ie_triplet *triplet;
1456         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1457         int i, chan_increment;
1458         bool have_chan_pwr = false;
1459
1460         /* Invalid IE */
1461         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1462                 return false;
1463
1464         triplet = (void *)(country_ie + 3);
1465         country_ie_len -= 3;
1466
1467         switch (channel->band) {
1468         default:
1469                 WARN_ON_ONCE(1);
1470                 /* fall through */
1471         case NL80211_BAND_2GHZ:
1472         case NL80211_BAND_60GHZ:
1473                 chan_increment = 1;
1474                 break;
1475         case NL80211_BAND_5GHZ:
1476                 chan_increment = 4;
1477                 break;
1478         }
1479
1480         /* find channel */
1481         while (country_ie_len >= 3) {
1482                 u8 first_channel = triplet->chans.first_channel;
1483
1484                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1485                         goto next;
1486
1487                 for (i = 0; i < triplet->chans.num_channels; i++) {
1488                         if (first_channel + i * chan_increment == chan) {
1489                                 have_chan_pwr = true;
1490                                 *chan_pwr = triplet->chans.max_power;
1491                                 break;
1492                         }
1493                 }
1494                 if (have_chan_pwr)
1495                         break;
1496
1497  next:
1498                 triplet++;
1499                 country_ie_len -= 3;
1500         }
1501
1502         if (have_chan_pwr && pwr_constr_elem)
1503                 *pwr_reduction = *pwr_constr_elem;
1504         else
1505                 *pwr_reduction = 0;
1506
1507         return have_chan_pwr;
1508 }
1509
1510 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1511                                       struct ieee80211_channel *channel,
1512                                       const u8 *cisco_dtpc_ie,
1513                                       int *pwr_level)
1514 {
1515         /* From practical testing, the first data byte of the DTPC element
1516          * seems to contain the requested dBm level, and the CLI on Cisco
1517          * APs clearly state the range is -127 to 127 dBm, which indicates
1518          * a signed byte, although it seemingly never actually goes negative.
1519          * The other byte seems to always be zero.
1520          */
1521         *pwr_level = (__s8)cisco_dtpc_ie[4];
1522 }
1523
1524 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1525                                        struct ieee80211_channel *channel,
1526                                        struct ieee80211_mgmt *mgmt,
1527                                        const u8 *country_ie, u8 country_ie_len,
1528                                        const u8 *pwr_constr_ie,
1529                                        const u8 *cisco_dtpc_ie)
1530 {
1531         bool has_80211h_pwr = false, has_cisco_pwr = false;
1532         int chan_pwr = 0, pwr_reduction_80211h = 0;
1533         int pwr_level_cisco, pwr_level_80211h;
1534         int new_ap_level;
1535         __le16 capab = mgmt->u.probe_resp.capab_info;
1536
1537         if (country_ie &&
1538             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1539              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1540                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1541                         sdata, channel, country_ie, country_ie_len,
1542                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1543                 pwr_level_80211h =
1544                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1545         }
1546
1547         if (cisco_dtpc_ie) {
1548                 ieee80211_find_cisco_dtpc(
1549                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1550                 has_cisco_pwr = true;
1551         }
1552
1553         if (!has_80211h_pwr && !has_cisco_pwr)
1554                 return 0;
1555
1556         /* If we have both 802.11h and Cisco DTPC, apply both limits
1557          * by picking the smallest of the two power levels advertised.
1558          */
1559         if (has_80211h_pwr &&
1560             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1561                 new_ap_level = pwr_level_80211h;
1562
1563                 if (sdata->ap_power_level == new_ap_level)
1564                         return 0;
1565
1566                 sdata_dbg(sdata,
1567                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1568                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1569                           sdata->u.mgd.bssid);
1570         } else {  /* has_cisco_pwr is always true here. */
1571                 new_ap_level = pwr_level_cisco;
1572
1573                 if (sdata->ap_power_level == new_ap_level)
1574                         return 0;
1575
1576                 sdata_dbg(sdata,
1577                           "Limiting TX power to %d dBm as advertised by %pM\n",
1578                           pwr_level_cisco, sdata->u.mgd.bssid);
1579         }
1580
1581         sdata->ap_power_level = new_ap_level;
1582         if (__ieee80211_recalc_txpower(sdata))
1583                 return BSS_CHANGED_TXPOWER;
1584         return 0;
1585 }
1586
1587 /* powersave */
1588 static void ieee80211_enable_ps(struct ieee80211_local *local,
1589                                 struct ieee80211_sub_if_data *sdata)
1590 {
1591         struct ieee80211_conf *conf = &local->hw.conf;
1592
1593         /*
1594          * If we are scanning right now then the parameters will
1595          * take effect when scan finishes.
1596          */
1597         if (local->scanning)
1598                 return;
1599
1600         if (conf->dynamic_ps_timeout > 0 &&
1601             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1602                 mod_timer(&local->dynamic_ps_timer, jiffies +
1603                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1604         } else {
1605                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1606                         ieee80211_send_nullfunc(local, sdata, true);
1607
1608                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1609                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1610                         return;
1611
1612                 conf->flags |= IEEE80211_CONF_PS;
1613                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1614         }
1615 }
1616
1617 static void ieee80211_change_ps(struct ieee80211_local *local)
1618 {
1619         struct ieee80211_conf *conf = &local->hw.conf;
1620
1621         if (local->ps_sdata) {
1622                 ieee80211_enable_ps(local, local->ps_sdata);
1623         } else if (conf->flags & IEEE80211_CONF_PS) {
1624                 conf->flags &= ~IEEE80211_CONF_PS;
1625                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1626                 del_timer_sync(&local->dynamic_ps_timer);
1627                 cancel_work_sync(&local->dynamic_ps_enable_work);
1628         }
1629 }
1630
1631 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1632 {
1633         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1634         struct sta_info *sta = NULL;
1635         bool authorized = false;
1636
1637         if (!mgd->powersave)
1638                 return false;
1639
1640         if (mgd->broken_ap)
1641                 return false;
1642
1643         if (!mgd->associated)
1644                 return false;
1645
1646         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1647                 return false;
1648
1649         if (!mgd->have_beacon)
1650                 return false;
1651
1652         rcu_read_lock();
1653         sta = sta_info_get(sdata, mgd->bssid);
1654         if (sta)
1655                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1656         rcu_read_unlock();
1657
1658         return authorized;
1659 }
1660
1661 /* need to hold RTNL or interface lock */
1662 void ieee80211_recalc_ps(struct ieee80211_local *local)
1663 {
1664         struct ieee80211_sub_if_data *sdata, *found = NULL;
1665         int count = 0;
1666         int timeout;
1667
1668         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1669                 local->ps_sdata = NULL;
1670                 return;
1671         }
1672
1673         list_for_each_entry(sdata, &local->interfaces, list) {
1674                 if (!ieee80211_sdata_running(sdata))
1675                         continue;
1676                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1677                         /* If an AP vif is found, then disable PS
1678                          * by setting the count to zero thereby setting
1679                          * ps_sdata to NULL.
1680                          */
1681                         count = 0;
1682                         break;
1683                 }
1684                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1685                         continue;
1686                 found = sdata;
1687                 count++;
1688         }
1689
1690         if (count == 1 && ieee80211_powersave_allowed(found)) {
1691                 u8 dtimper = found->u.mgd.dtim_period;
1692
1693                 timeout = local->dynamic_ps_forced_timeout;
1694                 if (timeout < 0)
1695                         timeout = 100;
1696                 local->hw.conf.dynamic_ps_timeout = timeout;
1697
1698                 /* If the TIM IE is invalid, pretend the value is 1 */
1699                 if (!dtimper)
1700                         dtimper = 1;
1701
1702                 local->hw.conf.ps_dtim_period = dtimper;
1703                 local->ps_sdata = found;
1704         } else {
1705                 local->ps_sdata = NULL;
1706         }
1707
1708         ieee80211_change_ps(local);
1709 }
1710
1711 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1712 {
1713         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1714
1715         if (sdata->vif.bss_conf.ps != ps_allowed) {
1716                 sdata->vif.bss_conf.ps = ps_allowed;
1717                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1718         }
1719 }
1720
1721 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1722 {
1723         struct ieee80211_local *local =
1724                 container_of(work, struct ieee80211_local,
1725                              dynamic_ps_disable_work);
1726
1727         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1728                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1729                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1730         }
1731
1732         ieee80211_wake_queues_by_reason(&local->hw,
1733                                         IEEE80211_MAX_QUEUE_MAP,
1734                                         IEEE80211_QUEUE_STOP_REASON_PS,
1735                                         false);
1736 }
1737
1738 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1739 {
1740         struct ieee80211_local *local =
1741                 container_of(work, struct ieee80211_local,
1742                              dynamic_ps_enable_work);
1743         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1744         struct ieee80211_if_managed *ifmgd;
1745         unsigned long flags;
1746         int q;
1747
1748         /* can only happen when PS was just disabled anyway */
1749         if (!sdata)
1750                 return;
1751
1752         ifmgd = &sdata->u.mgd;
1753
1754         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1755                 return;
1756
1757         if (local->hw.conf.dynamic_ps_timeout > 0) {
1758                 /* don't enter PS if TX frames are pending */
1759                 if (drv_tx_frames_pending(local)) {
1760                         mod_timer(&local->dynamic_ps_timer, jiffies +
1761                                   msecs_to_jiffies(
1762                                   local->hw.conf.dynamic_ps_timeout));
1763                         return;
1764                 }
1765
1766                 /*
1767                  * transmission can be stopped by others which leads to
1768                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1769                  * is not the actual idle state.
1770                  */
1771                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1772                 for (q = 0; q < local->hw.queues; q++) {
1773                         if (local->queue_stop_reasons[q]) {
1774                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1775                                                        flags);
1776                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1777                                           msecs_to_jiffies(
1778                                           local->hw.conf.dynamic_ps_timeout));
1779                                 return;
1780                         }
1781                 }
1782                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1783         }
1784
1785         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1786             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1787                 if (drv_tx_frames_pending(local)) {
1788                         mod_timer(&local->dynamic_ps_timer, jiffies +
1789                                   msecs_to_jiffies(
1790                                   local->hw.conf.dynamic_ps_timeout));
1791                 } else {
1792                         ieee80211_send_nullfunc(local, sdata, true);
1793                         /* Flush to get the tx status of nullfunc frame */
1794                         ieee80211_flush_queues(local, sdata, false);
1795                 }
1796         }
1797
1798         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1799               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1800             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1801                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1802                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1803                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1804         }
1805 }
1806
1807 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1808 {
1809         struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1810
1811         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1812 }
1813
1814 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1815 {
1816         struct delayed_work *delayed_work = to_delayed_work(work);
1817         struct ieee80211_sub_if_data *sdata =
1818                 container_of(delayed_work, struct ieee80211_sub_if_data,
1819                              dfs_cac_timer_work);
1820         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1821
1822         mutex_lock(&sdata->local->mtx);
1823         if (sdata->wdev.cac_started) {
1824                 ieee80211_vif_release_channel(sdata);
1825                 cfg80211_cac_event(sdata->dev, &chandef,
1826                                    NL80211_RADAR_CAC_FINISHED,
1827                                    GFP_KERNEL);
1828         }
1829         mutex_unlock(&sdata->local->mtx);
1830 }
1831
1832 static bool
1833 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1834 {
1835         struct ieee80211_local *local = sdata->local;
1836         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1837         bool ret = false;
1838         int ac;
1839
1840         if (local->hw.queues < IEEE80211_NUM_ACS)
1841                 return false;
1842
1843         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1844                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1845                 int non_acm_ac;
1846                 unsigned long now = jiffies;
1847
1848                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1849                     tx_tspec->admitted_time &&
1850                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1851                         tx_tspec->consumed_tx_time = 0;
1852                         tx_tspec->time_slice_start = now;
1853
1854                         if (tx_tspec->downgraded)
1855                                 tx_tspec->action =
1856                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1857                 }
1858
1859                 switch (tx_tspec->action) {
1860                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1861                         /* take the original parameters */
1862                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1863                                 sdata_err(sdata,
1864                                           "failed to set TX queue parameters for queue %d\n",
1865                                           ac);
1866                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1867                         tx_tspec->downgraded = false;
1868                         ret = true;
1869                         break;
1870                 case TX_TSPEC_ACTION_DOWNGRADE:
1871                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1872                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1873                                 ret = true;
1874                                 break;
1875                         }
1876                         /* downgrade next lower non-ACM AC */
1877                         for (non_acm_ac = ac + 1;
1878                              non_acm_ac < IEEE80211_NUM_ACS;
1879                              non_acm_ac++)
1880                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1881                                         break;
1882                         /* Usually the loop will result in using BK even if it
1883                          * requires admission control, but such a configuration
1884                          * makes no sense and we have to transmit somehow - the
1885                          * AC selection does the same thing.
1886                          * If we started out trying to downgrade from BK, then
1887                          * the extra condition here might be needed.
1888                          */
1889                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1890                                 non_acm_ac = IEEE80211_AC_BK;
1891                         if (drv_conf_tx(local, sdata, ac,
1892                                         &sdata->tx_conf[non_acm_ac]))
1893                                 sdata_err(sdata,
1894                                           "failed to set TX queue parameters for queue %d\n",
1895                                           ac);
1896                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1897                         ret = true;
1898                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1899                                 tx_tspec->time_slice_start + HZ - now + 1);
1900                         break;
1901                 case TX_TSPEC_ACTION_NONE:
1902                         /* nothing now */
1903                         break;
1904                 }
1905         }
1906
1907         return ret;
1908 }
1909
1910 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1911 {
1912         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1913                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1914 }
1915
1916 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1917 {
1918         struct ieee80211_sub_if_data *sdata;
1919
1920         sdata = container_of(work, struct ieee80211_sub_if_data,
1921                              u.mgd.tx_tspec_wk.work);
1922         ieee80211_sta_handle_tspec_ac_params(sdata);
1923 }
1924
1925 /* MLME */
1926 static bool
1927 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1928                          struct ieee80211_sub_if_data *sdata,
1929                          const u8 *wmm_param, size_t wmm_param_len,
1930                          const struct ieee80211_mu_edca_param_set *mu_edca)
1931 {
1932         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1933         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1934         size_t left;
1935         int count, mu_edca_count, ac;
1936         const u8 *pos;
1937         u8 uapsd_queues = 0;
1938
1939         if (!local->ops->conf_tx)
1940                 return false;
1941
1942         if (local->hw.queues < IEEE80211_NUM_ACS)
1943                 return false;
1944
1945         if (!wmm_param)
1946                 return false;
1947
1948         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1949                 return false;
1950
1951         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1952                 uapsd_queues = ifmgd->uapsd_queues;
1953
1954         count = wmm_param[6] & 0x0f;
1955         /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
1956          * if mu_edca was preset before and now it disappeared tell
1957          * the driver about it.
1958          */
1959         mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
1960         if (count == ifmgd->wmm_last_param_set &&
1961             mu_edca_count == ifmgd->mu_edca_last_param_set)
1962                 return false;
1963         ifmgd->wmm_last_param_set = count;
1964         ifmgd->mu_edca_last_param_set = mu_edca_count;
1965
1966         pos = wmm_param + 8;
1967         left = wmm_param_len - 8;
1968
1969         memset(&params, 0, sizeof(params));
1970
1971         sdata->wmm_acm = 0;
1972         for (; left >= 4; left -= 4, pos += 4) {
1973                 int aci = (pos[0] >> 5) & 0x03;
1974                 int acm = (pos[0] >> 4) & 0x01;
1975                 bool uapsd = false;
1976
1977                 switch (aci) {
1978                 case 1: /* AC_BK */
1979                         ac = IEEE80211_AC_BK;
1980                         if (acm)
1981                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1982                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1983                                 uapsd = true;
1984                         params[ac].mu_edca = !!mu_edca;
1985                         if (mu_edca)
1986                                 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
1987                         break;
1988                 case 2: /* AC_VI */
1989                         ac = IEEE80211_AC_VI;
1990                         if (acm)
1991                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1992                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1993                                 uapsd = true;
1994                         params[ac].mu_edca = !!mu_edca;
1995                         if (mu_edca)
1996                                 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
1997                         break;
1998                 case 3: /* AC_VO */
1999                         ac = IEEE80211_AC_VO;
2000                         if (acm)
2001                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2002                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2003                                 uapsd = true;
2004                         params[ac].mu_edca = !!mu_edca;
2005                         if (mu_edca)
2006                                 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2007                         break;
2008                 case 0: /* AC_BE */
2009                 default:
2010                         ac = IEEE80211_AC_BE;
2011                         if (acm)
2012                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2013                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2014                                 uapsd = true;
2015                         params[ac].mu_edca = !!mu_edca;
2016                         if (mu_edca)
2017                                 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2018                         break;
2019                 }
2020
2021                 params[ac].aifs = pos[0] & 0x0f;
2022
2023                 if (params[ac].aifs < 2) {
2024                         sdata_info(sdata,
2025                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2026                                    params[ac].aifs, aci);
2027                         params[ac].aifs = 2;
2028                 }
2029                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2030                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2031                 params[ac].txop = get_unaligned_le16(pos + 2);
2032                 params[ac].acm = acm;
2033                 params[ac].uapsd = uapsd;
2034
2035                 if (params[ac].cw_min == 0 ||
2036                     params[ac].cw_min > params[ac].cw_max) {
2037                         sdata_info(sdata,
2038                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2039                                    params[ac].cw_min, params[ac].cw_max, aci);
2040                         return false;
2041                 }
2042                 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2043         }
2044
2045         /* WMM specification requires all 4 ACIs. */
2046         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2047                 if (params[ac].cw_min == 0) {
2048                         sdata_info(sdata,
2049                                    "AP has invalid WMM params (missing AC %d), using defaults\n",
2050                                    ac);
2051                         return false;
2052                 }
2053         }
2054
2055         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2056                 mlme_dbg(sdata,
2057                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2058                          ac, params[ac].acm,
2059                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2060                          params[ac].txop, params[ac].uapsd,
2061                          ifmgd->tx_tspec[ac].downgraded);
2062                 sdata->tx_conf[ac] = params[ac];
2063                 if (!ifmgd->tx_tspec[ac].downgraded &&
2064                     drv_conf_tx(local, sdata, ac, &params[ac]))
2065                         sdata_err(sdata,
2066                                   "failed to set TX queue parameters for AC %d\n",
2067                                   ac);
2068         }
2069
2070         /* enable WMM or activate new settings */
2071         sdata->vif.bss_conf.qos = true;
2072         return true;
2073 }
2074
2075 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2076 {
2077         lockdep_assert_held(&sdata->local->mtx);
2078
2079         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2080         ieee80211_run_deferred_scan(sdata->local);
2081 }
2082
2083 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2084 {
2085         mutex_lock(&sdata->local->mtx);
2086         __ieee80211_stop_poll(sdata);
2087         mutex_unlock(&sdata->local->mtx);
2088 }
2089
2090 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2091                                            u16 capab, bool erp_valid, u8 erp)
2092 {
2093         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2094         struct ieee80211_supported_band *sband;
2095         u32 changed = 0;
2096         bool use_protection;
2097         bool use_short_preamble;
2098         bool use_short_slot;
2099
2100         sband = ieee80211_get_sband(sdata);
2101         if (!sband)
2102                 return changed;
2103
2104         if (erp_valid) {
2105                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2106                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2107         } else {
2108                 use_protection = false;
2109                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2110         }
2111
2112         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2113         if (sband->band == NL80211_BAND_5GHZ)
2114                 use_short_slot = true;
2115
2116         if (use_protection != bss_conf->use_cts_prot) {
2117                 bss_conf->use_cts_prot = use_protection;
2118                 changed |= BSS_CHANGED_ERP_CTS_PROT;
2119         }
2120
2121         if (use_short_preamble != bss_conf->use_short_preamble) {
2122                 bss_conf->use_short_preamble = use_short_preamble;
2123                 changed |= BSS_CHANGED_ERP_PREAMBLE;
2124         }
2125
2126         if (use_short_slot != bss_conf->use_short_slot) {
2127                 bss_conf->use_short_slot = use_short_slot;
2128                 changed |= BSS_CHANGED_ERP_SLOT;
2129         }
2130
2131         return changed;
2132 }
2133
2134 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2135                                      struct cfg80211_bss *cbss,
2136                                      u32 bss_info_changed)
2137 {
2138         struct ieee80211_bss *bss = (void *)cbss->priv;
2139         struct ieee80211_local *local = sdata->local;
2140         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2141
2142         bss_info_changed |= BSS_CHANGED_ASSOC;
2143         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2144                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2145
2146         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2147                 beacon_loss_count * bss_conf->beacon_int));
2148
2149         sdata->u.mgd.associated = cbss;
2150         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2151
2152         ieee80211_check_rate_mask(sdata);
2153
2154         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2155
2156         if (sdata->vif.p2p ||
2157             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2158                 const struct cfg80211_bss_ies *ies;
2159
2160                 rcu_read_lock();
2161                 ies = rcu_dereference(cbss->ies);
2162                 if (ies) {
2163                         int ret;
2164
2165                         ret = cfg80211_get_p2p_attr(
2166                                         ies->data, ies->len,
2167                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2168                                         (u8 *) &bss_conf->p2p_noa_attr,
2169                                         sizeof(bss_conf->p2p_noa_attr));
2170                         if (ret >= 2) {
2171                                 sdata->u.mgd.p2p_noa_index =
2172                                         bss_conf->p2p_noa_attr.index;
2173                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
2174                         }
2175                 }
2176                 rcu_read_unlock();
2177         }
2178
2179         /* just to be sure */
2180         ieee80211_stop_poll(sdata);
2181
2182         ieee80211_led_assoc(local, 1);
2183
2184         if (sdata->u.mgd.have_beacon) {
2185                 /*
2186                  * If the AP is buggy we may get here with no DTIM period
2187                  * known, so assume it's 1 which is the only safe assumption
2188                  * in that case, although if the TIM IE is broken powersave
2189                  * probably just won't work at all.
2190                  */
2191                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2192                 bss_conf->beacon_rate = bss->beacon_rate;
2193                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2194         } else {
2195                 bss_conf->beacon_rate = NULL;
2196                 bss_conf->dtim_period = 0;
2197         }
2198
2199         bss_conf->assoc = 1;
2200
2201         /* Tell the driver to monitor connection quality (if supported) */
2202         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2203             bss_conf->cqm_rssi_thold)
2204                 bss_info_changed |= BSS_CHANGED_CQM;
2205
2206         /* Enable ARP filtering */
2207         if (bss_conf->arp_addr_cnt)
2208                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2209
2210         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2211
2212         mutex_lock(&local->iflist_mtx);
2213         ieee80211_recalc_ps(local);
2214         mutex_unlock(&local->iflist_mtx);
2215
2216         ieee80211_recalc_smps(sdata);
2217         ieee80211_recalc_ps_vif(sdata);
2218
2219         netif_carrier_on(sdata->dev);
2220 }
2221
2222 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2223                                    u16 stype, u16 reason, bool tx,
2224                                    u8 *frame_buf)
2225 {
2226         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2227         struct ieee80211_local *local = sdata->local;
2228         u32 changed = 0;
2229
2230         sdata_assert_lock(sdata);
2231
2232         if (WARN_ON_ONCE(tx && !frame_buf))
2233                 return;
2234
2235         if (WARN_ON(!ifmgd->associated))
2236                 return;
2237
2238         ieee80211_stop_poll(sdata);
2239
2240         ifmgd->associated = NULL;
2241         netif_carrier_off(sdata->dev);
2242
2243         /*
2244          * if we want to get out of ps before disassoc (why?) we have
2245          * to do it before sending disassoc, as otherwise the null-packet
2246          * won't be valid.
2247          */
2248         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2249                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2250                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2251         }
2252         local->ps_sdata = NULL;
2253
2254         /* disable per-vif ps */
2255         ieee80211_recalc_ps_vif(sdata);
2256
2257         /* make sure ongoing transmission finishes */
2258         synchronize_net();
2259
2260         /*
2261          * drop any frame before deauth/disassoc, this can be data or
2262          * management frame. Since we are disconnecting, we should not
2263          * insist sending these frames which can take time and delay
2264          * the disconnection and possible the roaming.
2265          */
2266         if (tx)
2267                 ieee80211_flush_queues(local, sdata, true);
2268
2269         /* deauthenticate/disassociate now */
2270         if (tx || frame_buf) {
2271                 /*
2272                  * In multi channel scenarios guarantee that the virtual
2273                  * interface is granted immediate airtime to transmit the
2274                  * deauthentication frame by calling mgd_prepare_tx, if the
2275                  * driver requested so.
2276                  */
2277                 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2278                     !ifmgd->have_beacon)
2279                         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2280
2281                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2282                                                reason, tx, frame_buf);
2283         }
2284
2285         /* flush out frame - make sure the deauth was actually sent */
2286         if (tx)
2287                 ieee80211_flush_queues(local, sdata, false);
2288
2289         /* clear bssid only after building the needed mgmt frames */
2290         eth_zero_addr(ifmgd->bssid);
2291
2292         /* remove AP and TDLS peers */
2293         sta_info_flush(sdata);
2294
2295         /* finally reset all BSS / config parameters */
2296         changed |= ieee80211_reset_erp_info(sdata);
2297
2298         ieee80211_led_assoc(local, 0);
2299         changed |= BSS_CHANGED_ASSOC;
2300         sdata->vif.bss_conf.assoc = false;
2301
2302         ifmgd->p2p_noa_index = -1;
2303         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2304                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2305
2306         /* on the next assoc, re-program HT/VHT parameters */
2307         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2308         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2309         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2310         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2311
2312         /* reset MU-MIMO ownership and group data */
2313         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2314                sizeof(sdata->vif.bss_conf.mu_group.membership));
2315         memset(sdata->vif.bss_conf.mu_group.position, 0,
2316                sizeof(sdata->vif.bss_conf.mu_group.position));
2317         changed |= BSS_CHANGED_MU_GROUPS;
2318         sdata->vif.mu_mimo_owner = false;
2319
2320         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2321
2322         del_timer_sync(&local->dynamic_ps_timer);
2323         cancel_work_sync(&local->dynamic_ps_enable_work);
2324
2325         /* Disable ARP filtering */
2326         if (sdata->vif.bss_conf.arp_addr_cnt)
2327                 changed |= BSS_CHANGED_ARP_FILTER;
2328
2329         sdata->vif.bss_conf.qos = false;
2330         changed |= BSS_CHANGED_QOS;
2331
2332         /* The BSSID (not really interesting) and HT changed */
2333         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2334         ieee80211_bss_info_change_notify(sdata, changed);
2335
2336         /* disassociated - set to defaults now */
2337         ieee80211_set_wmm_default(sdata, false, false);
2338
2339         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2340         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2341         del_timer_sync(&sdata->u.mgd.timer);
2342         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2343
2344         sdata->vif.bss_conf.dtim_period = 0;
2345         sdata->vif.bss_conf.beacon_rate = NULL;
2346
2347         ifmgd->have_beacon = false;
2348
2349         ifmgd->flags = 0;
2350         mutex_lock(&local->mtx);
2351         ieee80211_vif_release_channel(sdata);
2352
2353         sdata->vif.csa_active = false;
2354         ifmgd->csa_waiting_bcn = false;
2355         ifmgd->csa_ignored_same_chan = false;
2356         if (sdata->csa_block_tx) {
2357                 ieee80211_wake_vif_queues(local, sdata,
2358                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2359                 sdata->csa_block_tx = false;
2360         }
2361         mutex_unlock(&local->mtx);
2362
2363         /* existing TX TSPEC sessions no longer exist */
2364         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2365         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2366
2367         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2368 }
2369
2370 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2371                              struct ieee80211_hdr *hdr)
2372 {
2373         /*
2374          * We can postpone the mgd.timer whenever receiving unicast frames
2375          * from AP because we know that the connection is working both ways
2376          * at that time. But multicast frames (and hence also beacons) must
2377          * be ignored here, because we need to trigger the timer during
2378          * data idle periods for sending the periodic probe request to the
2379          * AP we're connected to.
2380          */
2381         if (is_multicast_ether_addr(hdr->addr1))
2382                 return;
2383
2384         ieee80211_sta_reset_conn_monitor(sdata);
2385 }
2386
2387 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2388 {
2389         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2390         struct ieee80211_local *local = sdata->local;
2391
2392         mutex_lock(&local->mtx);
2393         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2394                 goto out;
2395
2396         __ieee80211_stop_poll(sdata);
2397
2398         mutex_lock(&local->iflist_mtx);
2399         ieee80211_recalc_ps(local);
2400         mutex_unlock(&local->iflist_mtx);
2401
2402         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2403                 goto out;
2404
2405         /*
2406          * We've received a probe response, but are not sure whether
2407          * we have or will be receiving any beacons or data, so let's
2408          * schedule the timers again, just in case.
2409          */
2410         ieee80211_sta_reset_beacon_monitor(sdata);
2411
2412         mod_timer(&ifmgd->conn_mon_timer,
2413                   round_jiffies_up(jiffies +
2414                                    IEEE80211_CONNECTION_IDLE_TIME));
2415 out:
2416         mutex_unlock(&local->mtx);
2417 }
2418
2419 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2420                                            struct ieee80211_hdr *hdr,
2421                                            u16 tx_time)
2422 {
2423         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2424         u16 tid = ieee80211_get_tid(hdr);
2425         int ac = ieee80211_ac_from_tid(tid);
2426         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2427         unsigned long now = jiffies;
2428
2429         if (likely(!tx_tspec->admitted_time))
2430                 return;
2431
2432         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2433                 tx_tspec->consumed_tx_time = 0;
2434                 tx_tspec->time_slice_start = now;
2435
2436                 if (tx_tspec->downgraded) {
2437                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2438                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2439                 }
2440         }
2441
2442         if (tx_tspec->downgraded)
2443                 return;
2444
2445         tx_tspec->consumed_tx_time += tx_time;
2446
2447         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2448                 tx_tspec->downgraded = true;
2449                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2450                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2451         }
2452 }
2453
2454 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2455                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2456 {
2457         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2458
2459         if (!ieee80211_is_data(hdr->frame_control))
2460             return;
2461
2462         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2463             sdata->u.mgd.probe_send_count > 0) {
2464                 if (ack)
2465                         ieee80211_sta_reset_conn_monitor(sdata);
2466                 else
2467                         sdata->u.mgd.nullfunc_failed = true;
2468                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2469                 return;
2470         }
2471
2472         if (ack)
2473                 ieee80211_sta_reset_conn_monitor(sdata);
2474 }
2475
2476 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2477                                           const u8 *src, const u8 *dst,
2478                                           const u8 *ssid, size_t ssid_len,
2479                                           struct ieee80211_channel *channel)
2480 {
2481         struct sk_buff *skb;
2482
2483         skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2484                                         ssid, ssid_len, NULL, 0,
2485                                         IEEE80211_PROBE_FLAG_DIRECTED);
2486         if (skb)
2487                 ieee80211_tx_skb(sdata, skb);
2488 }
2489
2490 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2491 {
2492         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2493         const u8 *ssid;
2494         u8 *dst = ifmgd->associated->bssid;
2495         u8 unicast_limit = max(1, max_probe_tries - 3);
2496         struct sta_info *sta;
2497
2498         /*
2499          * Try sending broadcast probe requests for the last three
2500          * probe requests after the first ones failed since some
2501          * buggy APs only support broadcast probe requests.
2502          */
2503         if (ifmgd->probe_send_count >= unicast_limit)
2504                 dst = NULL;
2505
2506         /*
2507          * When the hardware reports an accurate Tx ACK status, it's
2508          * better to send a nullfunc frame instead of a probe request,
2509          * as it will kick us off the AP quickly if we aren't associated
2510          * anymore. The timeout will be reset if the frame is ACKed by
2511          * the AP.
2512          */
2513         ifmgd->probe_send_count++;
2514
2515         if (dst) {
2516                 mutex_lock(&sdata->local->sta_mtx);
2517                 sta = sta_info_get(sdata, dst);
2518                 if (!WARN_ON(!sta))
2519                         ieee80211_check_fast_rx(sta);
2520                 mutex_unlock(&sdata->local->sta_mtx);
2521         }
2522
2523         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2524                 ifmgd->nullfunc_failed = false;
2525                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
2526                         ifmgd->probe_send_count--;
2527                 else
2528                         ieee80211_send_nullfunc(sdata->local, sdata, false);
2529         } else {
2530                 int ssid_len;
2531
2532                 rcu_read_lock();
2533                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2534                 if (WARN_ON_ONCE(ssid == NULL))
2535                         ssid_len = 0;
2536                 else
2537                         ssid_len = ssid[1];
2538
2539                 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2540                                               ssid + 2, ssid_len,
2541                                               ifmgd->associated->channel);
2542                 rcu_read_unlock();
2543         }
2544
2545         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2546         run_again(sdata, ifmgd->probe_timeout);
2547 }
2548
2549 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2550                                    bool beacon)
2551 {
2552         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2553         bool already = false;
2554
2555         if (!ieee80211_sdata_running(sdata))
2556                 return;
2557
2558         sdata_lock(sdata);
2559
2560         if (!ifmgd->associated)
2561                 goto out;
2562
2563         mutex_lock(&sdata->local->mtx);
2564
2565         if (sdata->local->tmp_channel || sdata->local->scanning) {
2566                 mutex_unlock(&sdata->local->mtx);
2567                 goto out;
2568         }
2569
2570         if (beacon) {
2571                 mlme_dbg_ratelimited(sdata,
2572                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2573                                      beacon_loss_count);
2574
2575                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2576         }
2577
2578         /*
2579          * The driver/our work has already reported this event or the
2580          * connection monitoring has kicked in and we have already sent
2581          * a probe request. Or maybe the AP died and the driver keeps
2582          * reporting until we disassociate...
2583          *
2584          * In either case we have to ignore the current call to this
2585          * function (except for setting the correct probe reason bit)
2586          * because otherwise we would reset the timer every time and
2587          * never check whether we received a probe response!
2588          */
2589         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2590                 already = true;
2591
2592         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2593
2594         mutex_unlock(&sdata->local->mtx);
2595
2596         if (already)
2597                 goto out;
2598
2599         mutex_lock(&sdata->local->iflist_mtx);
2600         ieee80211_recalc_ps(sdata->local);
2601         mutex_unlock(&sdata->local->iflist_mtx);
2602
2603         ifmgd->probe_send_count = 0;
2604         ieee80211_mgd_probe_ap_send(sdata);
2605  out:
2606         sdata_unlock(sdata);
2607 }
2608
2609 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2610                                           struct ieee80211_vif *vif)
2611 {
2612         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2613         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2614         struct cfg80211_bss *cbss;
2615         struct sk_buff *skb;
2616         const u8 *ssid;
2617         int ssid_len;
2618
2619         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2620                 return NULL;
2621
2622         sdata_assert_lock(sdata);
2623
2624         if (ifmgd->associated)
2625                 cbss = ifmgd->associated;
2626         else if (ifmgd->auth_data)
2627                 cbss = ifmgd->auth_data->bss;
2628         else if (ifmgd->assoc_data)
2629                 cbss = ifmgd->assoc_data->bss;
2630         else
2631                 return NULL;
2632
2633         rcu_read_lock();
2634         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2635         if (WARN_ON_ONCE(ssid == NULL))
2636                 ssid_len = 0;
2637         else
2638                 ssid_len = ssid[1];
2639
2640         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2641                                         (u32) -1, cbss->channel,
2642                                         ssid + 2, ssid_len,
2643                                         NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2644         rcu_read_unlock();
2645
2646         return skb;
2647 }
2648 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2649
2650 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2651                                         const u8 *buf, size_t len, bool tx,
2652                                         u16 reason)
2653 {
2654         struct ieee80211_event event = {
2655                 .type = MLME_EVENT,
2656                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2657                 .u.mlme.reason = reason,
2658         };
2659
2660         if (tx)
2661                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2662         else
2663                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2664
2665         drv_event_callback(sdata->local, sdata, &event);
2666 }
2667
2668 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2669 {
2670         struct ieee80211_local *local = sdata->local;
2671         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2672         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2673         bool tx;
2674
2675         sdata_lock(sdata);
2676         if (!ifmgd->associated) {
2677                 sdata_unlock(sdata);
2678                 return;
2679         }
2680
2681         tx = !sdata->csa_block_tx;
2682
2683         /* AP is probably out of range (or not reachable for another reason) so
2684          * remove the bss struct for that AP.
2685          */
2686         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2687
2688         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2689                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2690                                tx, frame_buf);
2691         mutex_lock(&local->mtx);
2692         sdata->vif.csa_active = false;
2693         ifmgd->csa_waiting_bcn = false;
2694         if (sdata->csa_block_tx) {
2695                 ieee80211_wake_vif_queues(local, sdata,
2696                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2697                 sdata->csa_block_tx = false;
2698         }
2699         mutex_unlock(&local->mtx);
2700
2701         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2702                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2703
2704         sdata_unlock(sdata);
2705 }
2706
2707 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2708 {
2709         struct ieee80211_sub_if_data *sdata =
2710                 container_of(work, struct ieee80211_sub_if_data,
2711                              u.mgd.beacon_connection_loss_work);
2712         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2713
2714         if (ifmgd->associated)
2715                 ifmgd->beacon_loss_count++;
2716
2717         if (ifmgd->connection_loss) {
2718                 sdata_info(sdata, "Connection to AP %pM lost\n",
2719                            ifmgd->bssid);
2720                 __ieee80211_disconnect(sdata);
2721         } else {
2722                 ieee80211_mgd_probe_ap(sdata, true);
2723         }
2724 }
2725
2726 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2727 {
2728         struct ieee80211_sub_if_data *sdata =
2729                 container_of(work, struct ieee80211_sub_if_data,
2730                              u.mgd.csa_connection_drop_work);
2731
2732         __ieee80211_disconnect(sdata);
2733 }
2734
2735 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2736 {
2737         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2738         struct ieee80211_hw *hw = &sdata->local->hw;
2739
2740         trace_api_beacon_loss(sdata);
2741
2742         sdata->u.mgd.connection_loss = false;
2743         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2744 }
2745 EXPORT_SYMBOL(ieee80211_beacon_loss);
2746
2747 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2748 {
2749         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2750         struct ieee80211_hw *hw = &sdata->local->hw;
2751
2752         trace_api_connection_loss(sdata);
2753
2754         sdata->u.mgd.connection_loss = true;
2755         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2756 }
2757 EXPORT_SYMBOL(ieee80211_connection_loss);
2758
2759
2760 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2761                                         bool assoc)
2762 {
2763         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2764
2765         sdata_assert_lock(sdata);
2766
2767         if (!assoc) {
2768                 /*
2769                  * we are not authenticated yet, the only timer that could be
2770                  * running is the timeout for the authentication response which
2771                  * which is not relevant anymore.
2772                  */
2773                 del_timer_sync(&sdata->u.mgd.timer);
2774                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2775
2776                 eth_zero_addr(sdata->u.mgd.bssid);
2777                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2778                 sdata->u.mgd.flags = 0;
2779                 mutex_lock(&sdata->local->mtx);
2780                 ieee80211_vif_release_channel(sdata);
2781                 mutex_unlock(&sdata->local->mtx);
2782         }
2783
2784         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2785         kfree(auth_data);
2786         sdata->u.mgd.auth_data = NULL;
2787 }
2788
2789 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2790                                          bool assoc, bool abandon)
2791 {
2792         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2793
2794         sdata_assert_lock(sdata);
2795
2796         if (!assoc) {
2797                 /*
2798                  * we are not associated yet, the only timer that could be
2799                  * running is the timeout for the association response which
2800                  * which is not relevant anymore.
2801                  */
2802                 del_timer_sync(&sdata->u.mgd.timer);
2803                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2804
2805                 eth_zero_addr(sdata->u.mgd.bssid);
2806                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2807                 sdata->u.mgd.flags = 0;
2808                 sdata->vif.mu_mimo_owner = false;
2809
2810                 mutex_lock(&sdata->local->mtx);
2811                 ieee80211_vif_release_channel(sdata);
2812                 mutex_unlock(&sdata->local->mtx);
2813
2814                 if (abandon)
2815                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2816         }
2817
2818         kfree(assoc_data);
2819         sdata->u.mgd.assoc_data = NULL;
2820 }
2821
2822 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2823                                      struct ieee80211_mgmt *mgmt, size_t len)
2824 {
2825         struct ieee80211_local *local = sdata->local;
2826         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2827         u8 *pos;
2828         struct ieee802_11_elems elems;
2829         u32 tx_flags = 0;
2830
2831         pos = mgmt->u.auth.variable;
2832         ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
2833                                mgmt->bssid, auth_data->bss->bssid);
2834         if (!elems.challenge)
2835                 return;
2836         auth_data->expected_transaction = 4;
2837         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2838         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2839                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2840                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2841         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2842                             elems.challenge - 2, elems.challenge_len + 2,
2843                             auth_data->bss->bssid, auth_data->bss->bssid,
2844                             auth_data->key, auth_data->key_len,
2845                             auth_data->key_idx, tx_flags);
2846 }
2847
2848 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2849                                     const u8 *bssid)
2850 {
2851         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2852         struct sta_info *sta;
2853         bool result = true;
2854
2855         sdata_info(sdata, "authenticated\n");
2856         ifmgd->auth_data->done = true;
2857         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2858         ifmgd->auth_data->timeout_started = true;
2859         run_again(sdata, ifmgd->auth_data->timeout);
2860
2861         /* move station state to auth */
2862         mutex_lock(&sdata->local->sta_mtx);
2863         sta = sta_info_get(sdata, bssid);
2864         if (!sta) {
2865                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2866                 result = false;
2867                 goto out;
2868         }
2869         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2870                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2871                 result = false;
2872                 goto out;
2873         }
2874
2875 out:
2876         mutex_unlock(&sdata->local->sta_mtx);
2877         return result;
2878 }
2879
2880 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2881                                    struct ieee80211_mgmt *mgmt, size_t len)
2882 {
2883         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2884         u8 bssid[ETH_ALEN];
2885         u16 auth_alg, auth_transaction, status_code;
2886         struct ieee80211_event event = {
2887                 .type = MLME_EVENT,
2888                 .u.mlme.data = AUTH_EVENT,
2889         };
2890
2891         sdata_assert_lock(sdata);
2892
2893         if (len < 24 + 6)
2894                 return;
2895
2896         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2897                 return;
2898
2899         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2900
2901         if (!ether_addr_equal(bssid, mgmt->bssid))
2902                 return;
2903
2904         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2905         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2906         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2907
2908         if (auth_alg != ifmgd->auth_data->algorithm ||
2909             (auth_alg != WLAN_AUTH_SAE &&
2910              auth_transaction != ifmgd->auth_data->expected_transaction) ||
2911             (auth_alg == WLAN_AUTH_SAE &&
2912              (auth_transaction < ifmgd->auth_data->expected_transaction ||
2913               auth_transaction > 2))) {
2914                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2915                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2916                            auth_transaction,
2917                            ifmgd->auth_data->expected_transaction);
2918                 return;
2919         }
2920
2921         if (status_code != WLAN_STATUS_SUCCESS) {
2922                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2923                            mgmt->sa, status_code);
2924                 ieee80211_destroy_auth_data(sdata, false);
2925                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2926                 event.u.mlme.status = MLME_DENIED;
2927                 event.u.mlme.reason = status_code;
2928                 drv_event_callback(sdata->local, sdata, &event);
2929                 return;
2930         }
2931
2932         switch (ifmgd->auth_data->algorithm) {
2933         case WLAN_AUTH_OPEN:
2934         case WLAN_AUTH_LEAP:
2935         case WLAN_AUTH_FT:
2936         case WLAN_AUTH_SAE:
2937         case WLAN_AUTH_FILS_SK:
2938         case WLAN_AUTH_FILS_SK_PFS:
2939         case WLAN_AUTH_FILS_PK:
2940                 break;
2941         case WLAN_AUTH_SHARED_KEY:
2942                 if (ifmgd->auth_data->expected_transaction != 4) {
2943                         ieee80211_auth_challenge(sdata, mgmt, len);
2944                         /* need another frame */
2945                         return;
2946                 }
2947                 break;
2948         default:
2949                 WARN_ONCE(1, "invalid auth alg %d",
2950                           ifmgd->auth_data->algorithm);
2951                 return;
2952         }
2953
2954         event.u.mlme.status = MLME_SUCCESS;
2955         drv_event_callback(sdata->local, sdata, &event);
2956         if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
2957             (auth_transaction == 2 &&
2958              ifmgd->auth_data->expected_transaction == 2)) {
2959                 if (!ieee80211_mark_sta_auth(sdata, bssid))
2960                         goto out_err;
2961         } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2962                    auth_transaction == 2) {
2963                 sdata_info(sdata, "SAE peer confirmed\n");
2964                 ifmgd->auth_data->peer_confirmed = true;
2965         }
2966
2967         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2968         return;
2969  out_err:
2970         mutex_unlock(&sdata->local->sta_mtx);
2971         /* ignore frame -- wait for timeout */
2972 }
2973
2974 #define case_WLAN(type) \
2975         case WLAN_REASON_##type: return #type
2976
2977 const char *ieee80211_get_reason_code_string(u16 reason_code)
2978 {
2979         switch (reason_code) {
2980         case_WLAN(UNSPECIFIED);
2981         case_WLAN(PREV_AUTH_NOT_VALID);
2982         case_WLAN(DEAUTH_LEAVING);
2983         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2984         case_WLAN(DISASSOC_AP_BUSY);
2985         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2986         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2987         case_WLAN(DISASSOC_STA_HAS_LEFT);
2988         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2989         case_WLAN(DISASSOC_BAD_POWER);
2990         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2991         case_WLAN(INVALID_IE);
2992         case_WLAN(MIC_FAILURE);
2993         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2994         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2995         case_WLAN(IE_DIFFERENT);
2996         case_WLAN(INVALID_GROUP_CIPHER);
2997         case_WLAN(INVALID_PAIRWISE_CIPHER);
2998         case_WLAN(INVALID_AKMP);
2999         case_WLAN(UNSUPP_RSN_VERSION);
3000         case_WLAN(INVALID_RSN_IE_CAP);
3001         case_WLAN(IEEE8021X_FAILED);
3002         case_WLAN(CIPHER_SUITE_REJECTED);
3003         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
3004         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
3005         case_WLAN(DISASSOC_LOW_ACK);
3006         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
3007         case_WLAN(QSTA_LEAVE_QBSS);
3008         case_WLAN(QSTA_NOT_USE);
3009         case_WLAN(QSTA_REQUIRE_SETUP);
3010         case_WLAN(QSTA_TIMEOUT);
3011         case_WLAN(QSTA_CIPHER_NOT_SUPP);
3012         case_WLAN(MESH_PEER_CANCELED);
3013         case_WLAN(MESH_MAX_PEERS);
3014         case_WLAN(MESH_CONFIG);
3015         case_WLAN(MESH_CLOSE);
3016         case_WLAN(MESH_MAX_RETRIES);
3017         case_WLAN(MESH_CONFIRM_TIMEOUT);
3018         case_WLAN(MESH_INVALID_GTK);
3019         case_WLAN(MESH_INCONSISTENT_PARAM);
3020         case_WLAN(MESH_INVALID_SECURITY);
3021         case_WLAN(MESH_PATH_ERROR);
3022         case_WLAN(MESH_PATH_NOFORWARD);
3023         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3024         case_WLAN(MAC_EXISTS_IN_MBSS);
3025         case_WLAN(MESH_CHAN_REGULATORY);
3026         case_WLAN(MESH_CHAN);
3027         default: return "<unknown>";
3028         }
3029 }
3030
3031 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3032                                      struct ieee80211_mgmt *mgmt, size_t len)
3033 {
3034         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3035         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3036
3037         sdata_assert_lock(sdata);
3038
3039         if (len < 24 + 2)
3040                 return;
3041
3042         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3043                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3044                 return;
3045         }
3046
3047         if (ifmgd->associated &&
3048             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
3049                 const u8 *bssid = ifmgd->associated->bssid;
3050
3051                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3052                            bssid, reason_code,
3053                            ieee80211_get_reason_code_string(reason_code));
3054
3055                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3056
3057                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3058                                             reason_code);
3059                 return;
3060         }
3061
3062         if (ifmgd->assoc_data &&
3063             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3064                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3065
3066                 sdata_info(sdata,
3067                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3068                            bssid, reason_code,
3069                            ieee80211_get_reason_code_string(reason_code));
3070
3071                 ieee80211_destroy_assoc_data(sdata, false, true);
3072
3073                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3074                 return;
3075         }
3076 }
3077
3078
3079 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3080                                        struct ieee80211_mgmt *mgmt, size_t len)
3081 {
3082         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3083         u16 reason_code;
3084
3085         sdata_assert_lock(sdata);
3086
3087         if (len < 24 + 2)
3088                 return;
3089
3090         if (!ifmgd->associated ||
3091             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3092                 return;
3093
3094         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3095
3096         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3097                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3098                 return;
3099         }
3100
3101         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3102                    mgmt->sa, reason_code,
3103                    ieee80211_get_reason_code_string(reason_code));
3104
3105         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3106
3107         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3108 }
3109
3110 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3111                                 u8 *supp_rates, unsigned int supp_rates_len,
3112                                 u32 *rates, u32 *basic_rates,
3113                                 bool *have_higher_than_11mbit,
3114                                 int *min_rate, int *min_rate_index,
3115                                 int shift)
3116 {
3117         int i, j;
3118
3119         for (i = 0; i < supp_rates_len; i++) {
3120                 int rate = supp_rates[i] & 0x7f;
3121                 bool is_basic = !!(supp_rates[i] & 0x80);
3122
3123                 if ((rate * 5 * (1 << shift)) > 110)
3124                         *have_higher_than_11mbit = true;
3125
3126                 /*
3127                  * Skip HT and VHT BSS membership selectors since they're not
3128                  * rates.
3129                  *
3130                  * Note: Even though the membership selector and the basic
3131                  *       rate flag share the same bit, they are not exactly
3132                  *       the same.
3133                  */
3134                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3135                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3136                         continue;
3137
3138                 for (j = 0; j < sband->n_bitrates; j++) {
3139                         struct ieee80211_rate *br;
3140                         int brate;
3141
3142                         br = &sband->bitrates[j];
3143
3144                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3145                         if (brate == rate) {
3146                                 *rates |= BIT(j);
3147                                 if (is_basic)
3148                                         *basic_rates |= BIT(j);
3149                                 if ((rate * 5) < *min_rate) {
3150                                         *min_rate = rate * 5;
3151                                         *min_rate_index = j;
3152                                 }
3153                                 break;
3154                         }
3155                 }
3156         }
3157 }
3158
3159 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3160                                         const struct ieee802_11_elems *elems)
3161 {
3162         if (elems->ext_capab_len < 10)
3163                 return false;
3164
3165         if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3166                 return false;
3167
3168         return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3169                 IEEE80211_HE_MAC_CAP0_TWT_RES;
3170 }
3171
3172 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
3173                                     struct sta_info *sta,
3174                                     struct ieee802_11_elems *elems)
3175 {
3176         bool twt = ieee80211_twt_req_supported(sta, elems);
3177
3178         if (sdata->vif.bss_conf.twt_requester != twt) {
3179                 sdata->vif.bss_conf.twt_requester = twt;
3180                 return BSS_CHANGED_TWT;
3181         }
3182         return 0;
3183 }
3184
3185 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3186                                     struct cfg80211_bss *cbss,
3187                                     struct ieee80211_mgmt *mgmt, size_t len)
3188 {
3189         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3190         struct ieee80211_local *local = sdata->local;
3191         struct ieee80211_supported_band *sband;
3192         struct sta_info *sta;
3193         u8 *pos;
3194         u16 capab_info, aid;
3195         struct ieee802_11_elems elems;
3196         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3197         const struct cfg80211_bss_ies *bss_ies = NULL;
3198         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3199         u32 changed = 0;
3200         int err;
3201         bool ret;
3202
3203         /* AssocResp and ReassocResp have identical structure */
3204
3205         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3206         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3207
3208         /*
3209          * The 5 MSB of the AID field are reserved
3210          * (802.11-2016 9.4.1.8 AID field)
3211          */
3212         aid &= 0x7ff;
3213
3214         ifmgd->broken_ap = false;
3215
3216         if (aid == 0 || aid > IEEE80211_MAX_AID) {
3217                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3218                            aid);
3219                 aid = 0;
3220                 ifmgd->broken_ap = true;
3221         }
3222
3223         pos = mgmt->u.assoc_resp.variable;
3224         ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3225                                mgmt->bssid, assoc_data->bss->bssid);
3226
3227         if (!elems.supp_rates) {
3228                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3229                 return false;
3230         }
3231
3232         ifmgd->aid = aid;
3233         ifmgd->tdls_chan_switch_prohibited =
3234                 elems.ext_capab && elems.ext_capab_len >= 5 &&
3235                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3236
3237         /*
3238          * Some APs are erroneously not including some information in their
3239          * (re)association response frames. Try to recover by using the data
3240          * from the beacon or probe response. This seems to afflict mobile
3241          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3242          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3243          */
3244         if ((assoc_data->wmm && !elems.wmm_param) ||
3245             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3246              (!elems.ht_cap_elem || !elems.ht_operation)) ||
3247             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3248              (!elems.vht_cap_elem || !elems.vht_operation))) {
3249                 const struct cfg80211_bss_ies *ies;
3250                 struct ieee802_11_elems bss_elems;
3251
3252                 rcu_read_lock();
3253                 ies = rcu_dereference(cbss->ies);
3254                 if (ies)
3255                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3256                                           GFP_ATOMIC);
3257                 rcu_read_unlock();
3258                 if (!bss_ies)
3259                         return false;
3260
3261                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3262                                        false, &bss_elems,
3263                                        mgmt->bssid,
3264                                        assoc_data->bss->bssid);
3265                 if (assoc_data->wmm &&
3266                     !elems.wmm_param && bss_elems.wmm_param) {
3267                         elems.wmm_param = bss_elems.wmm_param;
3268                         sdata_info(sdata,
3269                                    "AP bug: WMM param missing from AssocResp\n");
3270                 }
3271
3272                 /*
3273                  * Also check if we requested HT/VHT, otherwise the AP doesn't
3274                  * have to include the IEs in the (re)association response.
3275                  */
3276                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
3277                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3278                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
3279                         sdata_info(sdata,
3280                                    "AP bug: HT capability missing from AssocResp\n");
3281                 }
3282                 if (!elems.ht_operation && bss_elems.ht_operation &&
3283                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3284                         elems.ht_operation = bss_elems.ht_operation;
3285                         sdata_info(sdata,
3286                                    "AP bug: HT operation missing from AssocResp\n");
3287                 }
3288                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3289                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3290                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
3291                         sdata_info(sdata,
3292                                    "AP bug: VHT capa missing from AssocResp\n");
3293                 }
3294                 if (!elems.vht_operation && bss_elems.vht_operation &&
3295                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3296                         elems.vht_operation = bss_elems.vht_operation;
3297                         sdata_info(sdata,
3298                                    "AP bug: VHT operation missing from AssocResp\n");
3299                 }
3300         }
3301
3302         /*
3303          * We previously checked these in the beacon/probe response, so
3304          * they should be present here. This is just a safety net.
3305          */
3306         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3307             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3308                 sdata_info(sdata,
3309                            "HT AP is missing WMM params or HT capability/operation\n");
3310                 ret = false;
3311                 goto out;
3312         }
3313
3314         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3315             (!elems.vht_cap_elem || !elems.vht_operation)) {
3316                 sdata_info(sdata,
3317                            "VHT AP is missing VHT capability/operation\n");
3318                 ret = false;
3319                 goto out;
3320         }
3321
3322         mutex_lock(&sdata->local->sta_mtx);
3323         /*
3324          * station info was already allocated and inserted before
3325          * the association and should be available to us
3326          */
3327         sta = sta_info_get(sdata, cbss->bssid);
3328         if (WARN_ON(!sta)) {
3329                 mutex_unlock(&sdata->local->sta_mtx);
3330                 ret = false;
3331                 goto out;
3332         }
3333
3334         sband = ieee80211_get_sband(sdata);
3335         if (!sband) {
3336                 mutex_unlock(&sdata->local->sta_mtx);
3337                 ret = false;
3338                 goto out;
3339         }
3340
3341         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3342             (!elems.he_cap || !elems.he_operation)) {
3343                 mutex_unlock(&sdata->local->sta_mtx);
3344                 sdata_info(sdata,
3345                            "HE AP is missing HE capability/operation\n");
3346                 ret = false;
3347                 goto out;
3348         }
3349
3350         /* Set up internal HT/VHT capabilities */
3351         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3352                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3353                                                   elems.ht_cap_elem, sta);
3354
3355         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3356                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3357                                                     elems.vht_cap_elem, sta);
3358
3359         if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3360             elems.he_cap) {
3361                 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3362                                                   elems.he_cap,
3363                                                   elems.he_cap_len,
3364                                                   sta);
3365
3366                 bss_conf->he_support = sta->sta.he_cap.has_he;
3367                 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);
3368         } else {
3369                 bss_conf->he_support = false;
3370                 bss_conf->twt_requester = false;
3371         }
3372
3373         if (bss_conf->he_support) {
3374                 bss_conf->bss_color =
3375                         le32_get_bits(elems.he_operation->he_oper_params,
3376                                       IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3377
3378                 bss_conf->htc_trig_based_pkt_ext =
3379                         le32_get_bits(elems.he_operation->he_oper_params,
3380                               IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3381                 bss_conf->frame_time_rts_th =
3382                         le32_get_bits(elems.he_operation->he_oper_params,
3383                               IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3384
3385                 bss_conf->multi_sta_back_32bit =
3386                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3387                         IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3388
3389                 bss_conf->ack_enabled =
3390                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3391                         IEEE80211_HE_MAC_CAP2_ACK_EN;
3392
3393                 bss_conf->uora_exists = !!elems.uora_element;
3394                 if (elems.uora_element)
3395                         bss_conf->uora_ocw_range = elems.uora_element[0];
3396
3397                 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems.he_operation);
3398                 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems.he_spr);
3399                 /* TODO: OPEN: what happens if BSS color disable is set? */
3400         }
3401
3402         if (cbss->transmitted_bss) {
3403                 bss_conf->nontransmitted = true;
3404                 ether_addr_copy(bss_conf->transmitter_bssid,
3405                                 cbss->transmitted_bss->bssid);
3406                 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
3407                 bss_conf->bssid_index = cbss->bssid_index;
3408         }
3409
3410         /*
3411          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3412          * in their association response, so ignore that data for our own
3413          * configuration. If it changed since the last beacon, we'll get the
3414          * next beacon and update then.
3415          */
3416
3417         /*
3418          * If an operating mode notification IE is present, override the
3419          * NSS calculation (that would be done in rate_control_rate_init())
3420          * and use the # of streams from that element.
3421          */
3422         if (elems.opmode_notif &&
3423             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3424                 u8 nss;
3425
3426                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3427                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3428                 nss += 1;
3429                 sta->sta.rx_nss = nss;
3430         }
3431
3432         rate_control_rate_init(sta);
3433
3434         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3435                 set_sta_flag(sta, WLAN_STA_MFP);
3436                 sta->sta.mfp = true;
3437         } else {
3438                 sta->sta.mfp = false;
3439         }
3440
3441         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3442
3443         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3444         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3445                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3446         if (err) {
3447                 sdata_info(sdata,
3448                            "failed to move station %pM to desired state\n",
3449                            sta->sta.addr);
3450                 WARN_ON(__sta_info_destroy(sta));
3451                 mutex_unlock(&sdata->local->sta_mtx);
3452                 ret = false;
3453                 goto out;
3454         }
3455
3456         mutex_unlock(&sdata->local->sta_mtx);
3457
3458         /*
3459          * Always handle WMM once after association regardless
3460          * of the first value the AP uses. Setting -1 here has
3461          * that effect because the AP values is an unsigned
3462          * 4-bit value.
3463          */
3464         ifmgd->wmm_last_param_set = -1;
3465         ifmgd->mu_edca_last_param_set = -1;
3466
3467         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3468                 ieee80211_set_wmm_default(sdata, false, false);
3469         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3470                                              elems.wmm_param_len,
3471                                              elems.mu_edca_param_set)) {
3472                 /* still enable QoS since we might have HT/VHT */
3473                 ieee80211_set_wmm_default(sdata, false, true);
3474                 /* set the disable-WMM flag in this case to disable
3475                  * tracking WMM parameter changes in the beacon if
3476                  * the parameters weren't actually valid. Doing so
3477                  * avoids changing parameters very strangely when
3478                  * the AP is going back and forth between valid and
3479                  * invalid parameters.
3480                  */
3481                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3482         }
3483         changed |= BSS_CHANGED_QOS;
3484
3485         if (elems.max_idle_period_ie) {
3486                 bss_conf->max_idle_period =
3487                         le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3488                 bss_conf->protected_keep_alive =
3489                         !!(elems.max_idle_period_ie->idle_options &
3490                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3491                 changed |= BSS_CHANGED_KEEP_ALIVE;
3492         } else {
3493                 bss_conf->max_idle_period = 0;
3494                 bss_conf->protected_keep_alive = false;
3495         }
3496
3497         /* set AID and assoc capability,
3498          * ieee80211_set_associated() will tell the driver */
3499         bss_conf->aid = aid;
3500         bss_conf->assoc_capability = capab_info;
3501         ieee80211_set_associated(sdata, cbss, changed);
3502
3503         /*
3504          * If we're using 4-addr mode, let the AP know that we're
3505          * doing so, so that it can create the STA VLAN on its side
3506          */
3507         if (ifmgd->use_4addr)
3508                 ieee80211_send_4addr_nullfunc(local, sdata);
3509
3510         /*
3511          * Start timer to probe the connection to the AP now.
3512          * Also start the timer that will detect beacon loss.
3513          */
3514         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3515         ieee80211_sta_reset_beacon_monitor(sdata);
3516
3517         ret = true;
3518  out:
3519         kfree(bss_ies);
3520         return ret;
3521 }
3522
3523 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3524                                          struct ieee80211_mgmt *mgmt,
3525                                          size_t len)
3526 {
3527         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3528         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3529         u16 capab_info, status_code, aid;
3530         struct ieee802_11_elems elems;
3531         int ac, uapsd_queues = -1;
3532         u8 *pos;
3533         bool reassoc;
3534         struct cfg80211_bss *bss;
3535         struct ieee80211_event event = {
3536                 .type = MLME_EVENT,
3537                 .u.mlme.data = ASSOC_EVENT,
3538         };
3539
3540         sdata_assert_lock(sdata);
3541
3542         if (!assoc_data)
3543                 return;
3544         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3545                 return;
3546
3547         /*
3548          * AssocResp and ReassocResp have identical structure, so process both
3549          * of them in this function.
3550          */
3551
3552         if (len < 24 + 6)
3553                 return;
3554
3555         reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3556         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3557         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3558         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3559
3560         sdata_info(sdata,
3561                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3562                    reassoc ? "Rea" : "A", mgmt->sa,
3563                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3564
3565         if (assoc_data->fils_kek_len &&
3566             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3567                 return;
3568
3569         pos = mgmt->u.assoc_resp.variable;
3570         ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3571                                mgmt->bssid, assoc_data->bss->bssid);
3572
3573         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3574             elems.timeout_int &&
3575             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3576                 u32 tu, ms;
3577                 tu = le32_to_cpu(elems.timeout_int->value);
3578                 ms = tu * 1024 / 1000;
3579                 sdata_info(sdata,
3580                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3581                            mgmt->sa, tu, ms);
3582                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3583                 assoc_data->timeout_started = true;
3584                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3585                         run_again(sdata, assoc_data->timeout);
3586                 return;
3587         }
3588
3589         bss = assoc_data->bss;
3590
3591         if (status_code != WLAN_STATUS_SUCCESS) {
3592                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3593                            mgmt->sa, status_code);
3594                 ieee80211_destroy_assoc_data(sdata, false, false);
3595                 event.u.mlme.status = MLME_DENIED;
3596                 event.u.mlme.reason = status_code;
3597                 drv_event_callback(sdata->local, sdata, &event);
3598         } else {
3599                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3600                         /* oops -- internal error -- send timeout for now */
3601                         ieee80211_destroy_assoc_data(sdata, false, false);
3602                         cfg80211_assoc_timeout(sdata->dev, bss);
3603                         return;
3604                 }
3605                 event.u.mlme.status = MLME_SUCCESS;
3606                 drv_event_callback(sdata->local, sdata, &event);
3607                 sdata_info(sdata, "associated\n");
3608
3609                 /*
3610                  * destroy assoc_data afterwards, as otherwise an idle
3611                  * recalc after assoc_data is NULL but before associated
3612                  * is set can cause the interface to go idle
3613                  */
3614                 ieee80211_destroy_assoc_data(sdata, true, false);
3615
3616                 /* get uapsd queues configuration */
3617                 uapsd_queues = 0;
3618                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3619                         if (sdata->tx_conf[ac].uapsd)
3620                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3621         }
3622
3623         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues,
3624                                ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
3625 }
3626
3627 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3628                                   struct ieee80211_mgmt *mgmt, size_t len,
3629                                   struct ieee80211_rx_status *rx_status)
3630 {
3631         struct ieee80211_local *local = sdata->local;
3632         struct ieee80211_bss *bss;
3633         struct ieee80211_channel *channel;
3634
3635         sdata_assert_lock(sdata);
3636
3637         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3638         if (!channel)
3639                 return;
3640
3641         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3642         if (bss) {
3643                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3644                 ieee80211_rx_bss_put(local, bss);
3645         }
3646 }
3647
3648
3649 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3650                                          struct sk_buff *skb)
3651 {
3652         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3653         struct ieee80211_if_managed *ifmgd;
3654         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3655         size_t baselen, len = skb->len;
3656
3657         ifmgd = &sdata->u.mgd;
3658
3659         sdata_assert_lock(sdata);
3660
3661         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3662                 return; /* ignore ProbeResp to foreign address */
3663
3664         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3665         if (baselen > len)
3666                 return;
3667
3668         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3669
3670         if (ifmgd->associated &&
3671             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3672                 ieee80211_reset_ap_probe(sdata);
3673 }
3674
3675 /*
3676  * This is the canonical list of information elements we care about,
3677  * the filter code also gives us all changes to the Microsoft OUI
3678  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3679  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3680  * changes to requested client power.
3681  *
3682  * We implement beacon filtering in software since that means we can
3683  * avoid processing the frame here and in cfg80211, and userspace
3684  * will not be able to tell whether the hardware supports it or not.
3685  *
3686  * XXX: This list needs to be dynamic -- userspace needs to be able to
3687  *      add items it requires. It also needs to be able to tell us to
3688  *      look out for other vendor IEs.
3689  */
3690 static const u64 care_about_ies =
3691         (1ULL << WLAN_EID_COUNTRY) |
3692         (1ULL << WLAN_EID_ERP_INFO) |
3693         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3694         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3695         (1ULL << WLAN_EID_HT_CAPABILITY) |
3696         (1ULL << WLAN_EID_HT_OPERATION) |
3697         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3698
3699 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3700                                         struct ieee80211_if_managed *ifmgd,
3701                                         struct ieee80211_bss_conf *bss_conf,
3702                                         struct ieee80211_local *local,
3703                                         struct ieee80211_rx_status *rx_status)
3704 {
3705         /* Track average RSSI from the Beacon frames of the current AP */
3706
3707         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3708                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3709                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3710                 ifmgd->last_cqm_event_signal = 0;
3711                 ifmgd->count_beacon_signal = 1;
3712                 ifmgd->last_ave_beacon_signal = 0;
3713         } else {
3714                 ifmgd->count_beacon_signal++;
3715         }
3716
3717         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3718
3719         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3720             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3721                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3722                 int last_sig = ifmgd->last_ave_beacon_signal;
3723                 struct ieee80211_event event = {
3724                         .type = RSSI_EVENT,
3725                 };
3726
3727                 /*
3728                  * if signal crosses either of the boundaries, invoke callback
3729                  * with appropriate parameters
3730                  */
3731                 if (sig > ifmgd->rssi_max_thold &&
3732                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3733                         ifmgd->last_ave_beacon_signal = sig;
3734                         event.u.rssi.data = RSSI_EVENT_HIGH;
3735                         drv_event_callback(local, sdata, &event);
3736                 } else if (sig < ifmgd->rssi_min_thold &&
3737                            (last_sig >= ifmgd->rssi_max_thold ||
3738                            last_sig == 0)) {
3739                         ifmgd->last_ave_beacon_signal = sig;
3740                         event.u.rssi.data = RSSI_EVENT_LOW;
3741                         drv_event_callback(local, sdata, &event);
3742                 }
3743         }
3744
3745         if (bss_conf->cqm_rssi_thold &&
3746             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3747             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3748                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3749                 int last_event = ifmgd->last_cqm_event_signal;
3750                 int thold = bss_conf->cqm_rssi_thold;
3751                 int hyst = bss_conf->cqm_rssi_hyst;
3752
3753                 if (sig < thold &&
3754                     (last_event == 0 || sig < last_event - hyst)) {
3755                         ifmgd->last_cqm_event_signal = sig;
3756                         ieee80211_cqm_rssi_notify(
3757                                 &sdata->vif,
3758                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3759                                 sig, GFP_KERNEL);
3760                 } else if (sig > thold &&
3761                            (last_event == 0 || sig > last_event + hyst)) {
3762                         ifmgd->last_cqm_event_signal = sig;
3763                         ieee80211_cqm_rssi_notify(
3764                                 &sdata->vif,
3765                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3766                                 sig, GFP_KERNEL);
3767                 }
3768         }
3769
3770         if (bss_conf->cqm_rssi_low &&
3771             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3772                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3773                 int last_event = ifmgd->last_cqm_event_signal;
3774                 int low = bss_conf->cqm_rssi_low;
3775                 int high = bss_conf->cqm_rssi_high;
3776
3777                 if (sig < low &&
3778                     (last_event == 0 || last_event >= low)) {
3779                         ifmgd->last_cqm_event_signal = sig;
3780                         ieee80211_cqm_rssi_notify(
3781                                 &sdata->vif,
3782                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3783                                 sig, GFP_KERNEL);
3784                 } else if (sig > high &&
3785                            (last_event == 0 || last_event <= high)) {
3786                         ifmgd->last_cqm_event_signal = sig;
3787                         ieee80211_cqm_rssi_notify(
3788                                 &sdata->vif,
3789                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3790                                 sig, GFP_KERNEL);
3791                 }
3792         }
3793 }
3794
3795 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
3796                                     struct cfg80211_bss *bss)
3797 {
3798         if (ether_addr_equal(tx_bssid, bss->bssid))
3799                 return true;
3800         if (!bss->transmitted_bss)
3801                 return false;
3802         return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
3803 }
3804
3805 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3806                                      struct ieee80211_mgmt *mgmt, size_t len,
3807                                      struct ieee80211_rx_status *rx_status)
3808 {
3809         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3810         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3811         size_t baselen;
3812         struct ieee802_11_elems elems;
3813         struct ieee80211_local *local = sdata->local;
3814         struct ieee80211_chanctx_conf *chanctx_conf;
3815         struct ieee80211_channel *chan;
3816         struct sta_info *sta;
3817         u32 changed = 0;
3818         bool erp_valid;
3819         u8 erp_value = 0;
3820         u32 ncrc;
3821         u8 *bssid;
3822         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3823
3824         sdata_assert_lock(sdata);
3825
3826         /* Process beacon from the current BSS */
3827         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3828         if (baselen > len)
3829                 return;
3830
3831         rcu_read_lock();
3832         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3833         if (!chanctx_conf) {
3834                 rcu_read_unlock();
3835                 return;
3836         }
3837
3838         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3839                 rcu_read_unlock();
3840                 return;
3841         }
3842         chan = chanctx_conf->def.chan;
3843         rcu_read_unlock();
3844
3845         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3846             ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) {
3847                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3848                                        len - baselen, false, &elems,
3849                                        mgmt->bssid,
3850                                        ifmgd->assoc_data->bss->bssid);
3851
3852                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3853
3854                 if (elems.dtim_period)
3855                         ifmgd->dtim_period = elems.dtim_period;
3856                 ifmgd->have_beacon = true;
3857                 ifmgd->assoc_data->need_beacon = false;
3858                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3859                         sdata->vif.bss_conf.sync_tsf =
3860                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3861                         sdata->vif.bss_conf.sync_device_ts =
3862                                 rx_status->device_timestamp;
3863                         sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3864                 }
3865
3866                 if (elems.mbssid_config_ie)
3867                         bss_conf->profile_periodicity =
3868                                 elems.mbssid_config_ie->profile_periodicity;
3869
3870                 if (elems.ext_capab_len >= 11 &&
3871                     (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
3872                         bss_conf->ema_ap = true;
3873
3874                 /* continue assoc process */
3875                 ifmgd->assoc_data->timeout = jiffies;
3876                 ifmgd->assoc_data->timeout_started = true;
3877                 run_again(sdata, ifmgd->assoc_data->timeout);
3878                 return;
3879         }
3880
3881         if (!ifmgd->associated ||
3882             !ieee80211_rx_our_beacon(mgmt->bssid,  ifmgd->associated))
3883                 return;
3884         bssid = ifmgd->associated->bssid;
3885
3886         if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3887                 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3888                                             local, rx_status);
3889
3890         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3891                 mlme_dbg_ratelimited(sdata,
3892                                      "cancelling AP probe due to a received beacon\n");
3893                 ieee80211_reset_ap_probe(sdata);
3894         }
3895
3896         /*
3897          * Push the beacon loss detection into the future since
3898          * we are processing a beacon from the AP just now.
3899          */
3900         ieee80211_sta_reset_beacon_monitor(sdata);
3901
3902         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3903         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3904                                           len - baselen, false, &elems,
3905                                           care_about_ies, ncrc,
3906                                           mgmt->bssid, bssid);
3907
3908         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3909             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3910                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3911                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3912                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3913                                 ieee80211_hw_config(local,
3914                                                     IEEE80211_CONF_CHANGE_PS);
3915                         }
3916                         ieee80211_send_nullfunc(local, sdata, false);
3917                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3918                         local->pspolling = true;
3919
3920                         /*
3921                          * Here is assumed that the driver will be
3922                          * able to send ps-poll frame and receive a
3923                          * response even though power save mode is
3924                          * enabled, but some drivers might require
3925                          * to disable power save here. This needs
3926                          * to be investigated.
3927                          */
3928                         ieee80211_send_pspoll(local, sdata);
3929                 }
3930         }
3931
3932         if (sdata->vif.p2p ||
3933             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3934                 struct ieee80211_p2p_noa_attr noa = {};
3935                 int ret;
3936
3937                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3938                                             len - baselen,
3939                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3940                                             (u8 *) &noa, sizeof(noa));
3941                 if (ret >= 2) {
3942                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3943                                 /* valid noa_attr and index changed */
3944                                 sdata->u.mgd.p2p_noa_index = noa.index;
3945                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3946                                 changed |= BSS_CHANGED_P2P_PS;
3947                                 /*
3948                                  * make sure we update all information, the CRC
3949                                  * mechanism doesn't look at P2P attributes.
3950                                  */
3951                                 ifmgd->beacon_crc_valid = false;
3952                         }
3953                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3954                         /* noa_attr not found and we had valid noa_attr before */
3955                         sdata->u.mgd.p2p_noa_index = -1;
3956                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3957                         changed |= BSS_CHANGED_P2P_PS;
3958                         ifmgd->beacon_crc_valid = false;
3959                 }
3960         }
3961
3962         if (ifmgd->csa_waiting_bcn)
3963                 ieee80211_chswitch_post_beacon(sdata);
3964
3965         /*
3966          * Update beacon timing and dtim count on every beacon appearance. This
3967          * will allow the driver to use the most updated values. Do it before
3968          * comparing this one with last received beacon.
3969          * IMPORTANT: These parameters would possibly be out of sync by the time
3970          * the driver will use them. The synchronized view is currently
3971          * guaranteed only in certain callbacks.
3972          */
3973         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3974                 sdata->vif.bss_conf.sync_tsf =
3975                         le64_to_cpu(mgmt->u.beacon.timestamp);
3976                 sdata->vif.bss_conf.sync_device_ts =
3977                         rx_status->device_timestamp;
3978                 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3979         }
3980
3981         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3982                 return;
3983         ifmgd->beacon_crc = ncrc;
3984         ifmgd->beacon_crc_valid = true;
3985
3986         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3987
3988         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3989                                          rx_status->device_timestamp,
3990                                          &elems, true);
3991
3992         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3993             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3994                                      elems.wmm_param_len,
3995                                      elems.mu_edca_param_set))
3996                 changed |= BSS_CHANGED_QOS;
3997
3998         /*
3999          * If we haven't had a beacon before, tell the driver about the
4000          * DTIM period (and beacon timing if desired) now.
4001          */
4002         if (!ifmgd->have_beacon) {
4003                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
4004                 bss_conf->dtim_period = elems.dtim_period ?: 1;
4005
4006                 changed |= BSS_CHANGED_BEACON_INFO;
4007                 ifmgd->have_beacon = true;
4008
4009                 mutex_lock(&local->iflist_mtx);
4010                 ieee80211_recalc_ps(local);
4011                 mutex_unlock(&local->iflist_mtx);
4012
4013                 ieee80211_recalc_ps_vif(sdata);
4014         }
4015
4016         if (elems.erp_info) {
4017                 erp_valid = true;
4018                 erp_value = elems.erp_info[0];
4019         } else {
4020                 erp_valid = false;
4021         }
4022         changed |= ieee80211_handle_bss_capability(sdata,
4023                         le16_to_cpu(mgmt->u.beacon.capab_info),
4024                         erp_valid, erp_value);
4025
4026         mutex_lock(&local->sta_mtx);
4027         sta = sta_info_get(sdata, bssid);
4028
4029         changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);
4030
4031         if (ieee80211_config_bw(sdata, sta,
4032                                 elems.ht_cap_elem, elems.ht_operation,
4033                                 elems.vht_operation, elems.he_operation,
4034                                 bssid, &changed)) {
4035                 mutex_unlock(&local->sta_mtx);
4036                 sdata_info(sdata,
4037                            "failed to follow AP %pM bandwidth change, disconnect\n",
4038                            bssid);
4039                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4040                                        WLAN_REASON_DEAUTH_LEAVING,
4041                                        true, deauth_buf);
4042                 ieee80211_report_disconnect(sdata, deauth_buf,
4043                                             sizeof(deauth_buf), true,
4044                                             WLAN_REASON_DEAUTH_LEAVING);
4045                 return;
4046         }
4047
4048         if (sta && elems.opmode_notif)
4049                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
4050                                             rx_status->band);
4051         mutex_unlock(&local->sta_mtx);
4052
4053         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
4054                                                elems.country_elem,
4055                                                elems.country_elem_len,
4056                                                elems.pwr_constr_elem,
4057                                                elems.cisco_dtpc_elem);
4058
4059         ieee80211_bss_info_change_notify(sdata, changed);
4060 }
4061
4062 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
4063                                   struct sk_buff *skb)
4064 {
4065         struct ieee80211_rx_status *rx_status;
4066         struct ieee80211_mgmt *mgmt;
4067         u16 fc;
4068         struct ieee802_11_elems elems;
4069         int ies_len;
4070
4071         rx_status = (struct ieee80211_rx_status *) skb->cb;
4072         mgmt = (struct ieee80211_mgmt *) skb->data;
4073         fc = le16_to_cpu(mgmt->frame_control);
4074
4075         sdata_lock(sdata);
4076
4077         switch (fc & IEEE80211_FCTL_STYPE) {
4078         case IEEE80211_STYPE_BEACON:
4079                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
4080                 break;
4081         case IEEE80211_STYPE_PROBE_RESP:
4082                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
4083                 break;
4084         case IEEE80211_STYPE_AUTH:
4085                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
4086                 break;
4087         case IEEE80211_STYPE_DEAUTH:
4088                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
4089                 break;
4090         case IEEE80211_STYPE_DISASSOC:
4091                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
4092                 break;
4093         case IEEE80211_STYPE_ASSOC_RESP:
4094         case IEEE80211_STYPE_REASSOC_RESP:
4095                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
4096                 break;
4097         case IEEE80211_STYPE_ACTION:
4098                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4099                         ies_len = skb->len -
4100                                   offsetof(struct ieee80211_mgmt,
4101                                            u.action.u.chan_switch.variable);
4102
4103                         if (ies_len < 0)
4104                                 break;
4105
4106                         /* CSA IE cannot be overridden, no need for BSSID */
4107                         ieee802_11_parse_elems(
4108                                 mgmt->u.action.u.chan_switch.variable,
4109                                 ies_len, true, &elems, mgmt->bssid, NULL);
4110
4111                         if (elems.parse_error)
4112                                 break;
4113
4114                         ieee80211_sta_process_chanswitch(sdata,
4115                                                  rx_status->mactime,
4116                                                  rx_status->device_timestamp,
4117                                                  &elems, false);
4118                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4119                         ies_len = skb->len -
4120                                   offsetof(struct ieee80211_mgmt,
4121                                            u.action.u.ext_chan_switch.variable);
4122
4123                         if (ies_len < 0)
4124                                 break;
4125
4126                         /*
4127                          * extended CSA IE can't be overridden, no need for
4128                          * BSSID
4129                          */
4130                         ieee802_11_parse_elems(
4131                                 mgmt->u.action.u.ext_chan_switch.variable,
4132                                 ies_len, true, &elems, mgmt->bssid, NULL);
4133
4134                         if (elems.parse_error)
4135                                 break;
4136
4137                         /* for the handling code pretend this was also an IE */
4138                         elems.ext_chansw_ie =
4139                                 &mgmt->u.action.u.ext_chan_switch.data;
4140
4141                         ieee80211_sta_process_chanswitch(sdata,
4142                                                  rx_status->mactime,
4143                                                  rx_status->device_timestamp,
4144                                                  &elems, false);
4145                 }
4146                 break;
4147         }
4148         sdata_unlock(sdata);
4149 }
4150
4151 static void ieee80211_sta_timer(struct timer_list *t)
4152 {
4153         struct ieee80211_sub_if_data *sdata =
4154                 from_timer(sdata, t, u.mgd.timer);
4155
4156         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4157 }
4158
4159 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4160                                           u8 *bssid, u8 reason, bool tx)
4161 {
4162         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4163
4164         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4165                                tx, frame_buf);
4166
4167         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4168                                     reason);
4169 }
4170
4171 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4172 {
4173         struct ieee80211_local *local = sdata->local;
4174         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4175         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4176         u32 tx_flags = 0;
4177         u16 trans = 1;
4178         u16 status = 0;
4179         u16 prepare_tx_duration = 0;
4180
4181         sdata_assert_lock(sdata);
4182
4183         if (WARN_ON_ONCE(!auth_data))
4184                 return -EINVAL;
4185
4186         auth_data->tries++;
4187
4188         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4189                 sdata_info(sdata, "authentication with %pM timed out\n",
4190                            auth_data->bss->bssid);
4191
4192                 /*
4193                  * Most likely AP is not in the range so remove the
4194                  * bss struct for that AP.
4195                  */
4196                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4197
4198                 return -ETIMEDOUT;
4199         }
4200
4201         if (auth_data->algorithm == WLAN_AUTH_SAE)
4202                 prepare_tx_duration =
4203                         jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4204
4205         drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4206
4207         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4208                    auth_data->bss->bssid, auth_data->tries,
4209                    IEEE80211_AUTH_MAX_TRIES);
4210
4211         auth_data->expected_transaction = 2;
4212
4213         if (auth_data->algorithm == WLAN_AUTH_SAE) {
4214                 trans = auth_data->sae_trans;
4215                 status = auth_data->sae_status;
4216                 auth_data->expected_transaction = trans;
4217         }
4218
4219         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4220                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4221                            IEEE80211_TX_INTFL_MLME_CONN_TX;
4222
4223         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4224                             auth_data->data, auth_data->data_len,
4225                             auth_data->bss->bssid,
4226                             auth_data->bss->bssid, NULL, 0, 0,
4227                             tx_flags);
4228
4229         if (tx_flags == 0) {
4230                 if (auth_data->algorithm == WLAN_AUTH_SAE)
4231                         auth_data->timeout = jiffies +
4232                                 IEEE80211_AUTH_TIMEOUT_SAE;
4233                 else
4234                         auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4235         } else {
4236                 auth_data->timeout =
4237                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4238         }
4239
4240         auth_data->timeout_started = true;
4241         run_again(sdata, auth_data->timeout);
4242
4243         return 0;
4244 }
4245
4246 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4247 {
4248         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4249         struct ieee80211_local *local = sdata->local;
4250
4251         sdata_assert_lock(sdata);
4252
4253         assoc_data->tries++;
4254         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4255                 sdata_info(sdata, "association with %pM timed out\n",
4256                            assoc_data->bss->bssid);
4257
4258                 /*
4259                  * Most likely AP is not in the range so remove the
4260                  * bss struct for that AP.
4261                  */
4262                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4263
4264                 return -ETIMEDOUT;
4265         }
4266
4267         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4268                    assoc_data->bss->bssid, assoc_data->tries,
4269                    IEEE80211_ASSOC_MAX_TRIES);
4270         ieee80211_send_assoc(sdata);
4271
4272         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4273                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4274                 assoc_data->timeout_started = true;
4275                 run_again(sdata, assoc_data->timeout);
4276         } else {
4277                 assoc_data->timeout =
4278                         round_jiffies_up(jiffies +
4279                                          IEEE80211_ASSOC_TIMEOUT_LONG);
4280                 assoc_data->timeout_started = true;
4281                 run_again(sdata, assoc_data->timeout);
4282         }
4283
4284         return 0;
4285 }
4286
4287 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4288                                   __le16 fc, bool acked)
4289 {
4290         struct ieee80211_local *local = sdata->local;
4291
4292         sdata->u.mgd.status_fc = fc;
4293         sdata->u.mgd.status_acked = acked;
4294         sdata->u.mgd.status_received = true;
4295
4296         ieee80211_queue_work(&local->hw, &sdata->work);
4297 }
4298
4299 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4300 {
4301         struct ieee80211_local *local = sdata->local;
4302         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4303
4304         sdata_lock(sdata);
4305
4306         if (ifmgd->status_received) {
4307                 __le16 fc = ifmgd->status_fc;
4308                 bool status_acked = ifmgd->status_acked;
4309
4310                 ifmgd->status_received = false;
4311                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4312                         if (status_acked) {
4313                                 if (ifmgd->auth_data->algorithm ==
4314                                     WLAN_AUTH_SAE)
4315                                         ifmgd->auth_data->timeout =
4316                                                 jiffies +
4317                                                 IEEE80211_AUTH_TIMEOUT_SAE;
4318                                 else
4319                                         ifmgd->auth_data->timeout =
4320                                                 jiffies +
4321                                                 IEEE80211_AUTH_TIMEOUT_SHORT;
4322                                 run_again(sdata, ifmgd->auth_data->timeout);
4323                         } else {
4324                                 ifmgd->auth_data->timeout = jiffies - 1;
4325                         }
4326                         ifmgd->auth_data->timeout_started = true;
4327                 } else if (ifmgd->assoc_data &&
4328                            (ieee80211_is_assoc_req(fc) ||
4329                             ieee80211_is_reassoc_req(fc))) {
4330                         if (status_acked) {
4331                                 ifmgd->assoc_data->timeout =
4332                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4333                                 run_again(sdata, ifmgd->assoc_data->timeout);
4334                         } else {
4335                                 ifmgd->assoc_data->timeout = jiffies - 1;
4336                         }
4337                         ifmgd->assoc_data->timeout_started = true;
4338                 }
4339         }
4340
4341         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4342             time_after(jiffies, ifmgd->auth_data->timeout)) {
4343                 if (ifmgd->auth_data->done) {
4344                         /*
4345                          * ok ... we waited for assoc but userspace didn't,
4346                          * so let's just kill the auth data
4347                          */
4348                         ieee80211_destroy_auth_data(sdata, false);
4349                 } else if (ieee80211_auth(sdata)) {
4350                         u8 bssid[ETH_ALEN];
4351                         struct ieee80211_event event = {
4352                                 .type = MLME_EVENT,
4353                                 .u.mlme.data = AUTH_EVENT,
4354                                 .u.mlme.status = MLME_TIMEOUT,
4355                         };
4356
4357                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4358
4359                         ieee80211_destroy_auth_data(sdata, false);
4360
4361                         cfg80211_auth_timeout(sdata->dev, bssid);
4362                         drv_event_callback(sdata->local, sdata, &event);
4363                 }
4364         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4365                 run_again(sdata, ifmgd->auth_data->timeout);
4366
4367         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4368             time_after(jiffies, ifmgd->assoc_data->timeout)) {
4369                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4370                     ieee80211_do_assoc(sdata)) {
4371                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4372                         struct ieee80211_event event = {
4373                                 .type = MLME_EVENT,
4374                                 .u.mlme.data = ASSOC_EVENT,
4375                                 .u.mlme.status = MLME_TIMEOUT,
4376                         };
4377
4378                         ieee80211_destroy_assoc_data(sdata, false, false);
4379                         cfg80211_assoc_timeout(sdata->dev, bss);
4380                         drv_event_callback(sdata->local, sdata, &event);
4381                 }
4382         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4383                 run_again(sdata, ifmgd->assoc_data->timeout);
4384
4385         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4386             ifmgd->associated) {
4387                 u8 bssid[ETH_ALEN];
4388                 int max_tries;
4389
4390                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4391
4392                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4393                         max_tries = max_nullfunc_tries;
4394                 else
4395                         max_tries = max_probe_tries;
4396
4397                 /* ACK received for nullfunc probing frame */
4398                 if (!ifmgd->probe_send_count)
4399                         ieee80211_reset_ap_probe(sdata);
4400                 else if (ifmgd->nullfunc_failed) {
4401                         if (ifmgd->probe_send_count < max_tries) {
4402                                 mlme_dbg(sdata,
4403                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4404                                          bssid, ifmgd->probe_send_count,
4405                                          max_tries);
4406                                 ieee80211_mgd_probe_ap_send(sdata);
4407                         } else {
4408                                 mlme_dbg(sdata,
4409                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4410                                          bssid);
4411                                 ieee80211_sta_connection_lost(sdata, bssid,
4412                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4413                                         false);
4414                         }
4415                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4416                         run_again(sdata, ifmgd->probe_timeout);
4417                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4418                         mlme_dbg(sdata,
4419                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4420                                  bssid, probe_wait_ms);
4421                         ieee80211_sta_connection_lost(sdata, bssid,
4422                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4423                 } else if (ifmgd->probe_send_count < max_tries) {
4424                         mlme_dbg(sdata,
4425                                  "No probe response from AP %pM after %dms, try %d/%i\n",
4426                                  bssid, probe_wait_ms,
4427                                  ifmgd->probe_send_count, max_tries);
4428                         ieee80211_mgd_probe_ap_send(sdata);
4429                 } else {
4430                         /*
4431                          * We actually lost the connection ... or did we?
4432                          * Let's make sure!
4433                          */
4434                         mlme_dbg(sdata,
4435                                  "No probe response from AP %pM after %dms, disconnecting.\n",
4436                                  bssid, probe_wait_ms);
4437
4438                         ieee80211_sta_connection_lost(sdata, bssid,
4439                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4440                 }
4441         }
4442
4443         sdata_unlock(sdata);
4444 }
4445
4446 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4447 {
4448         struct ieee80211_sub_if_data *sdata =
4449                 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4450         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4451
4452         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4453                 return;
4454
4455         sdata->u.mgd.connection_loss = false;
4456         ieee80211_queue_work(&sdata->local->hw,
4457                              &sdata->u.mgd.beacon_connection_loss_work);
4458 }
4459
4460 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4461 {
4462         struct ieee80211_sub_if_data *sdata =
4463                 from_timer(sdata, t, u.mgd.conn_mon_timer);
4464         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4465         struct ieee80211_local *local = sdata->local;
4466
4467         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4468                 return;
4469
4470         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4471 }
4472
4473 static void ieee80211_sta_monitor_work(struct work_struct *work)
4474 {
4475         struct ieee80211_sub_if_data *sdata =
4476                 container_of(work, struct ieee80211_sub_if_data,
4477                              u.mgd.monitor_work);
4478
4479         ieee80211_mgd_probe_ap(sdata, false);
4480 }
4481
4482 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4483 {
4484         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4485                 __ieee80211_stop_poll(sdata);
4486
4487                 /* let's probe the connection once */
4488                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4489                         ieee80211_queue_work(&sdata->local->hw,
4490                                              &sdata->u.mgd.monitor_work);
4491         }
4492 }
4493
4494 #ifdef CONFIG_PM
4495 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4496 {
4497         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4498         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4499
4500         sdata_lock(sdata);
4501
4502         if (ifmgd->auth_data || ifmgd->assoc_data) {
4503                 const u8 *bssid = ifmgd->auth_data ?
4504                                 ifmgd->auth_data->bss->bssid :
4505                                 ifmgd->assoc_data->bss->bssid;
4506
4507                 /*
4508                  * If we are trying to authenticate / associate while suspending,
4509                  * cfg80211 won't know and won't actually abort those attempts,
4510                  * thus we need to do that ourselves.
4511                  */
4512                 ieee80211_send_deauth_disassoc(sdata, bssid,
4513                                                IEEE80211_STYPE_DEAUTH,
4514                                                WLAN_REASON_DEAUTH_LEAVING,
4515                                                false, frame_buf);
4516                 if (ifmgd->assoc_data)
4517                         ieee80211_destroy_assoc_data(sdata, false, true);
4518                 if (ifmgd->auth_data)
4519                         ieee80211_destroy_auth_data(sdata, false);
4520                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4521                                       IEEE80211_DEAUTH_FRAME_LEN);
4522         }
4523
4524         /* This is a bit of a hack - we should find a better and more generic
4525          * solution to this. Normally when suspending, cfg80211 will in fact
4526          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4527          * auth (not so important) or assoc (this is the problem) process.
4528          *
4529          * As a consequence, it can happen that we are in the process of both
4530          * associating and suspending, and receive an association response
4531          * after cfg80211 has checked if it needs to disconnect, but before
4532          * we actually set the flag to drop incoming frames. This will then
4533          * cause the workqueue flush to process the association response in
4534          * the suspend, resulting in a successful association just before it
4535          * tries to remove the interface from the driver, which now though
4536          * has a channel context assigned ... this results in issues.
4537          *
4538          * To work around this (for now) simply deauth here again if we're
4539          * now connected.
4540          */
4541         if (ifmgd->associated && !sdata->local->wowlan) {
4542                 u8 bssid[ETH_ALEN];
4543                 struct cfg80211_deauth_request req = {
4544                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4545                         .bssid = bssid,
4546                 };
4547
4548                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4549                 ieee80211_mgd_deauth(sdata, &req);
4550         }
4551
4552         sdata_unlock(sdata);
4553 }
4554
4555 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4556 {
4557         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4558
4559         sdata_lock(sdata);
4560         if (!ifmgd->associated) {
4561                 sdata_unlock(sdata);
4562                 return;
4563         }
4564
4565         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4566                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4567                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4568                 ieee80211_sta_connection_lost(sdata,
4569                                               ifmgd->associated->bssid,
4570                                               WLAN_REASON_UNSPECIFIED,
4571                                               true);
4572                 sdata_unlock(sdata);
4573                 return;
4574         }
4575         sdata_unlock(sdata);
4576 }
4577 #endif
4578
4579 /* interface setup */
4580 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4581 {
4582         struct ieee80211_if_managed *ifmgd;
4583
4584         ifmgd = &sdata->u.mgd;
4585         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4586         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4587         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4588                   ieee80211_beacon_connection_loss_work);
4589         INIT_WORK(&ifmgd->csa_connection_drop_work,
4590                   ieee80211_csa_connection_drop_work);
4591         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4592         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4593                           ieee80211_tdls_peer_del_work);
4594         timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4595         timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4596         timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4597         timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4598         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4599                           ieee80211_sta_handle_tspec_ac_params_wk);
4600
4601         ifmgd->flags = 0;
4602         ifmgd->powersave = sdata->wdev.ps;
4603         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4604         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4605         ifmgd->p2p_noa_index = -1;
4606
4607         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4608                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4609         else
4610                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4611
4612         /* Setup TDLS data */
4613         spin_lock_init(&ifmgd->teardown_lock);
4614         ifmgd->teardown_skb = NULL;
4615         ifmgd->orig_teardown_skb = NULL;
4616 }
4617
4618 /* scan finished notification */
4619 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4620 {
4621         struct ieee80211_sub_if_data *sdata;
4622
4623         /* Restart STA timers */
4624         rcu_read_lock();
4625         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4626                 if (ieee80211_sdata_running(sdata))
4627                         ieee80211_restart_sta_timer(sdata);
4628         }
4629         rcu_read_unlock();
4630 }
4631
4632 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4633                                      struct cfg80211_bss *cbss)
4634 {
4635         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4636         const u8 *ht_cap_ie, *vht_cap_ie;
4637         const struct ieee80211_ht_cap *ht_cap;
4638         const struct ieee80211_vht_cap *vht_cap;
4639         u8 chains = 1;
4640
4641         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4642                 return chains;
4643
4644         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4645         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4646                 ht_cap = (void *)(ht_cap_ie + 2);
4647                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4648                 /*
4649                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4650                  *       "Tx Unequal Modulation Supported" fields.
4651                  */
4652         }
4653
4654         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4655                 return chains;
4656
4657         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4658         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4659                 u8 nss;
4660                 u16 tx_mcs_map;
4661
4662                 vht_cap = (void *)(vht_cap_ie + 2);
4663                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4664                 for (nss = 8; nss > 0; nss--) {
4665                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4666                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4667                                 break;
4668                 }
4669                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4670                 chains = max(chains, nss);
4671         }
4672
4673         return chains;
4674 }
4675
4676 static bool
4677 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4678                                     const struct ieee80211_he_operation *he_op)
4679 {
4680         const struct ieee80211_sta_he_cap *sta_he_cap =
4681                 ieee80211_get_he_sta_cap(sband);
4682         u16 ap_min_req_set;
4683         int i;
4684
4685         if (!sta_he_cap || !he_op)
4686                 return false;
4687
4688         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4689
4690         /* Need to go over for 80MHz, 160MHz and for 80+80 */
4691         for (i = 0; i < 3; i++) {
4692                 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4693                         &sta_he_cap->he_mcs_nss_supp;
4694                 u16 sta_mcs_map_rx =
4695                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4696                 u16 sta_mcs_map_tx =
4697                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4698                 u8 nss;
4699                 bool verified = true;
4700
4701                 /*
4702                  * For each band there is a maximum of 8 spatial streams
4703                  * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4704                  * of 2 bits per NSS (1-8), with the values defined in enum
4705                  * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4706                  * capabilities aren't less than the AP's minimum requirements
4707                  * for this HE BSS per SS.
4708                  * It is enough to find one such band that meets the reqs.
4709                  */
4710                 for (nss = 8; nss > 0; nss--) {
4711                         u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4712                         u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4713                         u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4714
4715                         if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4716                                 continue;
4717
4718                         /*
4719                          * Make sure the HE AP doesn't require MCSs that aren't
4720                          * supported by the client
4721                          */
4722                         if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4723                             sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4724                             (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4725                                 verified = false;
4726                                 break;
4727                         }
4728                 }
4729
4730                 if (verified)
4731                         return true;
4732         }
4733
4734         /* If here, STA doesn't meet AP's HE min requirements */
4735         return false;
4736 }
4737
4738 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4739                                   struct cfg80211_bss *cbss)
4740 {
4741         struct ieee80211_local *local = sdata->local;
4742         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4743         const struct ieee80211_ht_cap *ht_cap = NULL;
4744         const struct ieee80211_ht_operation *ht_oper = NULL;
4745         const struct ieee80211_vht_operation *vht_oper = NULL;
4746         const struct ieee80211_he_operation *he_oper = NULL;
4747         struct ieee80211_supported_band *sband;
4748         struct cfg80211_chan_def chandef;
4749         int ret;
4750         u32 i;
4751         bool have_80mhz;
4752
4753         sband = local->hw.wiphy->bands[cbss->channel->band];
4754
4755         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4756                           IEEE80211_STA_DISABLE_80P80MHZ |
4757                           IEEE80211_STA_DISABLE_160MHZ);
4758
4759         rcu_read_lock();
4760
4761         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4762             sband->ht_cap.ht_supported) {
4763                 const u8 *ht_oper_ie, *ht_cap_ie;
4764
4765                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4766                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4767                         ht_oper = (void *)(ht_oper_ie + 2);
4768
4769                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4770                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4771                         ht_cap = (void *)(ht_cap_ie + 2);
4772
4773                 if (!ht_cap) {
4774                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4775                         ht_oper = NULL;
4776                 }
4777         }
4778
4779         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4780             sband->vht_cap.vht_supported) {
4781                 const u8 *vht_oper_ie, *vht_cap;
4782
4783                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4784                                                    WLAN_EID_VHT_OPERATION);
4785                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4786                         vht_oper = (void *)(vht_oper_ie + 2);
4787                 if (vht_oper && !ht_oper) {
4788                         vht_oper = NULL;
4789                         sdata_info(sdata,
4790                                    "AP advertised VHT without HT, disabling both\n");
4791                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4792                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4793                 }
4794
4795                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4796                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4797                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4798                         vht_oper = NULL;
4799                 }
4800         }
4801
4802         if (!ieee80211_get_he_sta_cap(sband))
4803                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4804
4805         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
4806                 const struct cfg80211_bss_ies *ies;
4807                 const u8 *he_oper_ie;
4808
4809                 ies = rcu_dereference(cbss->ies);
4810                 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4811                                                   ies->data, ies->len);
4812                 if (he_oper_ie &&
4813                     he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4814                         he_oper = (void *)(he_oper_ie + 3);
4815                 else
4816                         he_oper = NULL;
4817
4818                 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4819                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4820         }
4821
4822         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4823         have_80mhz = false;
4824         for (i = 0; i < sband->n_channels; i++) {
4825                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4826                                                 IEEE80211_CHAN_NO_80MHZ))
4827                         continue;
4828
4829                 have_80mhz = true;
4830                 break;
4831         }
4832
4833         if (!have_80mhz)
4834                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4835
4836         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4837                                                      cbss->channel,
4838                                                      ht_oper, vht_oper, he_oper,
4839                                                      &chandef, false);
4840
4841         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4842                                       local->rx_chains);
4843
4844         rcu_read_unlock();
4845
4846         /* will change later if needed */
4847         sdata->smps_mode = IEEE80211_SMPS_OFF;
4848
4849         mutex_lock(&local->mtx);
4850         /*
4851          * If this fails (possibly due to channel context sharing
4852          * on incompatible channels, e.g. 80+80 and 160 sharing the
4853          * same control channel) try to use a smaller bandwidth.
4854          */
4855         ret = ieee80211_vif_use_channel(sdata, &chandef,
4856                                         IEEE80211_CHANCTX_SHARED);
4857
4858         /* don't downgrade for 5 and 10 MHz channels, though. */
4859         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4860             chandef.width == NL80211_CHAN_WIDTH_10)
4861                 goto out;
4862
4863         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4864                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4865                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4866                                                 IEEE80211_CHANCTX_SHARED);
4867         }
4868  out:
4869         mutex_unlock(&local->mtx);
4870         return ret;
4871 }
4872
4873 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4874                                u8 *dtim_count, u8 *dtim_period)
4875 {
4876         const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
4877         const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
4878                                          ies->len);
4879         const struct ieee80211_tim_ie *tim = NULL;
4880         const struct ieee80211_bssid_index *idx;
4881         bool valid = tim_ie && tim_ie[1] >= 2;
4882
4883         if (valid)
4884                 tim = (void *)(tim_ie + 2);
4885
4886         if (dtim_count)
4887                 *dtim_count = valid ? tim->dtim_count : 0;
4888
4889         if (dtim_period)
4890                 *dtim_period = valid ? tim->dtim_period : 0;
4891
4892         /* Check if value is overridden by non-transmitted profile */
4893         if (!idx_ie || idx_ie[1] < 3)
4894                 return valid;
4895
4896         idx = (void *)(idx_ie + 2);
4897
4898         if (dtim_count)
4899                 *dtim_count = idx->dtim_count;
4900
4901         if (dtim_period)
4902                 *dtim_period = idx->dtim_period;
4903
4904         return true;
4905 }
4906
4907 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4908                                      struct cfg80211_bss *cbss, bool assoc,
4909                                      bool override)
4910 {
4911         struct ieee80211_local *local = sdata->local;
4912         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4913         struct ieee80211_bss *bss = (void *)cbss->priv;
4914         struct sta_info *new_sta = NULL;
4915         struct ieee80211_supported_band *sband;
4916         bool have_sta = false;
4917         int err;
4918
4919         sband = local->hw.wiphy->bands[cbss->channel->band];
4920
4921         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4922                 return -EINVAL;
4923
4924         /* If a reconfig is happening, bail out */
4925         if (local->in_reconfig)
4926                 return -EBUSY;
4927
4928         if (assoc) {
4929                 rcu_read_lock();
4930                 have_sta = sta_info_get(sdata, cbss->bssid);
4931                 rcu_read_unlock();
4932         }
4933
4934         if (!have_sta) {
4935                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4936                 if (!new_sta)
4937                         return -ENOMEM;
4938         }
4939
4940         /*
4941          * Set up the information for the new channel before setting the
4942          * new channel. We can't - completely race-free - change the basic
4943          * rates bitmap and the channel (sband) that it refers to, but if
4944          * we set it up before we at least avoid calling into the driver's
4945          * bss_info_changed() method with invalid information (since we do
4946          * call that from changing the channel - only for IDLE and perhaps
4947          * some others, but ...).
4948          *
4949          * So to avoid that, just set up all the new information before the
4950          * channel, but tell the driver to apply it only afterwards, since
4951          * it might need the new channel for that.
4952          */
4953         if (new_sta) {
4954                 u32 rates = 0, basic_rates = 0;
4955                 bool have_higher_than_11mbit;
4956                 int min_rate = INT_MAX, min_rate_index = -1;
4957                 const struct cfg80211_bss_ies *ies;
4958                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4959
4960                 ieee80211_get_rates(sband, bss->supp_rates,
4961                                     bss->supp_rates_len,
4962                                     &rates, &basic_rates,
4963                                     &have_higher_than_11mbit,
4964                                     &min_rate, &min_rate_index,
4965                                     shift);
4966
4967                 /*
4968                  * This used to be a workaround for basic rates missing
4969                  * in the association response frame. Now that we no
4970                  * longer use the basic rates from there, it probably
4971                  * doesn't happen any more, but keep the workaround so
4972                  * in case some *other* APs are buggy in different ways
4973                  * we can connect -- with a warning.
4974                  */
4975                 if (!basic_rates && min_rate_index >= 0) {
4976                         sdata_info(sdata,
4977                                    "No basic rates, using min rate instead\n");
4978                         basic_rates = BIT(min_rate_index);
4979                 }
4980
4981                 if (rates)
4982                         new_sta->sta.supp_rates[cbss->channel->band] = rates;
4983                 else
4984                         sdata_info(sdata,
4985                                    "No rates found, keeping mandatory only\n");
4986
4987                 sdata->vif.bss_conf.basic_rates = basic_rates;
4988
4989                 /* cf. IEEE 802.11 9.2.12 */
4990                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4991                     have_higher_than_11mbit)
4992                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4993                 else
4994                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4995
4996                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4997
4998                 /* set timing information */
4999                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
5000                 rcu_read_lock();
5001                 ies = rcu_dereference(cbss->beacon_ies);
5002                 if (ies) {
5003                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
5004                         sdata->vif.bss_conf.sync_device_ts =
5005                                 bss->device_ts_beacon;
5006
5007                         ieee80211_get_dtim(ies,
5008                                            &sdata->vif.bss_conf.sync_dtim_count,
5009                                            NULL);
5010                 } else if (!ieee80211_hw_check(&sdata->local->hw,
5011                                                TIMING_BEACON_ONLY)) {
5012                         ies = rcu_dereference(cbss->proberesp_ies);
5013                         /* must be non-NULL since beacon IEs were NULL */
5014                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
5015                         sdata->vif.bss_conf.sync_device_ts =
5016                                 bss->device_ts_presp;
5017                         sdata->vif.bss_conf.sync_dtim_count = 0;
5018                 } else {
5019                         sdata->vif.bss_conf.sync_tsf = 0;
5020                         sdata->vif.bss_conf.sync_device_ts = 0;
5021                         sdata->vif.bss_conf.sync_dtim_count = 0;
5022                 }
5023                 rcu_read_unlock();
5024         }
5025
5026         if (new_sta || override) {
5027                 err = ieee80211_prep_channel(sdata, cbss);
5028                 if (err) {
5029                         if (new_sta)
5030                                 sta_info_free(local, new_sta);
5031                         return -EINVAL;
5032                 }
5033         }
5034
5035         if (new_sta) {
5036                 /*
5037                  * tell driver about BSSID, basic rates and timing
5038                  * this was set up above, before setting the channel
5039                  */
5040                 ieee80211_bss_info_change_notify(sdata,
5041                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
5042                         BSS_CHANGED_BEACON_INT);
5043
5044                 if (assoc)
5045                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5046
5047                 err = sta_info_insert(new_sta);
5048                 new_sta = NULL;
5049                 if (err) {
5050                         sdata_info(sdata,
5051                                    "failed to insert STA entry for the AP (error %d)\n",
5052                                    err);
5053                         return err;
5054                 }
5055         } else
5056                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5057
5058         /* Cancel scan to ensure that nothing interferes with connection */
5059         if (local->scanning)
5060                 ieee80211_scan_cancel(local);
5061
5062         return 0;
5063 }
5064
5065 /* config hooks */
5066 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
5067                        struct cfg80211_auth_request *req)
5068 {
5069         struct ieee80211_local *local = sdata->local;
5070         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5071         struct ieee80211_mgd_auth_data *auth_data;
5072         u16 auth_alg;
5073         int err;
5074         bool cont_auth;
5075
5076         /* prepare auth data structure */
5077
5078         switch (req->auth_type) {
5079         case NL80211_AUTHTYPE_OPEN_SYSTEM:
5080                 auth_alg = WLAN_AUTH_OPEN;
5081                 break;
5082         case NL80211_AUTHTYPE_SHARED_KEY:
5083                 if (fips_enabled)
5084                         return -EOPNOTSUPP;
5085                 auth_alg = WLAN_AUTH_SHARED_KEY;
5086                 break;
5087         case NL80211_AUTHTYPE_FT:
5088                 auth_alg = WLAN_AUTH_FT;
5089                 break;
5090         case NL80211_AUTHTYPE_NETWORK_EAP:
5091                 auth_alg = WLAN_AUTH_LEAP;
5092                 break;
5093         case NL80211_AUTHTYPE_SAE:
5094                 auth_alg = WLAN_AUTH_SAE;
5095                 break;
5096         case NL80211_AUTHTYPE_FILS_SK:
5097                 auth_alg = WLAN_AUTH_FILS_SK;
5098                 break;
5099         case NL80211_AUTHTYPE_FILS_SK_PFS:
5100                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
5101                 break;
5102         case NL80211_AUTHTYPE_FILS_PK:
5103                 auth_alg = WLAN_AUTH_FILS_PK;
5104                 break;
5105         default:
5106                 return -EOPNOTSUPP;
5107         }
5108
5109         if (ifmgd->assoc_data)
5110                 return -EBUSY;
5111
5112         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5113                             req->ie_len, GFP_KERNEL);
5114         if (!auth_data)
5115                 return -ENOMEM;
5116
5117         auth_data->bss = req->bss;
5118
5119         if (req->auth_data_len >= 4) {
5120                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
5121                         __le16 *pos = (__le16 *) req->auth_data;
5122
5123                         auth_data->sae_trans = le16_to_cpu(pos[0]);
5124                         auth_data->sae_status = le16_to_cpu(pos[1]);
5125                 }
5126                 memcpy(auth_data->data, req->auth_data + 4,
5127                        req->auth_data_len - 4);
5128                 auth_data->data_len += req->auth_data_len - 4;
5129         }
5130
5131         /* Check if continuing authentication or trying to authenticate with the
5132          * same BSS that we were in the process of authenticating with and avoid
5133          * removal and re-addition of the STA entry in
5134          * ieee80211_prep_connection().
5135          */
5136         cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
5137
5138         if (req->ie && req->ie_len) {
5139                 memcpy(&auth_data->data[auth_data->data_len],
5140                        req->ie, req->ie_len);
5141                 auth_data->data_len += req->ie_len;
5142         }
5143
5144         if (req->key && req->key_len) {
5145                 auth_data->key_len = req->key_len;
5146                 auth_data->key_idx = req->key_idx;
5147                 memcpy(auth_data->key, req->key, req->key_len);
5148         }
5149
5150         auth_data->algorithm = auth_alg;
5151
5152         /* try to authenticate/probe */
5153
5154         if (ifmgd->auth_data) {
5155                 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5156                         auth_data->peer_confirmed =
5157                                 ifmgd->auth_data->peer_confirmed;
5158                 }
5159                 ieee80211_destroy_auth_data(sdata, cont_auth);
5160         }
5161
5162         /* prep auth_data so we don't go into idle on disassoc */
5163         ifmgd->auth_data = auth_data;
5164
5165         /* If this is continuation of an ongoing SAE authentication exchange
5166          * (i.e., request to send SAE Confirm) and the peer has already
5167          * confirmed, mark authentication completed since we are about to send
5168          * out SAE Confirm.
5169          */
5170         if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5171             auth_data->peer_confirmed && auth_data->sae_trans == 2)
5172                 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5173
5174         if (ifmgd->associated) {
5175                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5176
5177                 sdata_info(sdata,
5178                            "disconnect from AP %pM for new auth to %pM\n",
5179                            ifmgd->associated->bssid, req->bss->bssid);
5180                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5181                                        WLAN_REASON_UNSPECIFIED,
5182                                        false, frame_buf);
5183
5184                 ieee80211_report_disconnect(sdata, frame_buf,
5185                                             sizeof(frame_buf), true,
5186                                             WLAN_REASON_UNSPECIFIED);
5187         }
5188
5189         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5190
5191         err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5192         if (err)
5193                 goto err_clear;
5194
5195         err = ieee80211_auth(sdata);
5196         if (err) {
5197                 sta_info_destroy_addr(sdata, req->bss->bssid);
5198                 goto err_clear;
5199         }
5200
5201         /* hold our own reference */
5202         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5203         return 0;
5204
5205  err_clear:
5206         eth_zero_addr(ifmgd->bssid);
5207         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5208         ifmgd->auth_data = NULL;
5209         mutex_lock(&sdata->local->mtx);
5210         ieee80211_vif_release_channel(sdata);
5211         mutex_unlock(&sdata->local->mtx);
5212         kfree(auth_data);
5213         return err;
5214 }
5215
5216 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5217                         struct cfg80211_assoc_request *req)
5218 {
5219         struct ieee80211_local *local = sdata->local;
5220         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5221         struct ieee80211_bss *bss = (void *)req->bss->priv;
5222         struct ieee80211_mgd_assoc_data *assoc_data;
5223         const struct cfg80211_bss_ies *beacon_ies;
5224         struct ieee80211_supported_band *sband;
5225         const u8 *ssidie, *ht_ie, *vht_ie;
5226         int i, err;
5227         bool override = false;
5228
5229         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5230         if (!assoc_data)
5231                 return -ENOMEM;
5232
5233         rcu_read_lock();
5234         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5235         if (!ssidie) {
5236                 rcu_read_unlock();
5237                 kfree(assoc_data);
5238                 return -EINVAL;
5239         }
5240         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5241         assoc_data->ssid_len = ssidie[1];
5242         rcu_read_unlock();
5243
5244         if (ifmgd->associated) {
5245                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5246
5247                 sdata_info(sdata,
5248                            "disconnect from AP %pM for new assoc to %pM\n",
5249                            ifmgd->associated->bssid, req->bss->bssid);
5250                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5251                                        WLAN_REASON_UNSPECIFIED,
5252                                        false, frame_buf);
5253
5254                 ieee80211_report_disconnect(sdata, frame_buf,
5255                                             sizeof(frame_buf), true,
5256                                             WLAN_REASON_UNSPECIFIED);
5257         }
5258
5259         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5260                 err = -EBUSY;
5261                 goto err_free;
5262         }
5263
5264         if (ifmgd->assoc_data) {
5265                 err = -EBUSY;
5266                 goto err_free;
5267         }
5268
5269         if (ifmgd->auth_data) {
5270                 bool match;
5271
5272                 /* keep sta info, bssid if matching */
5273                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5274                 ieee80211_destroy_auth_data(sdata, match);
5275         }
5276
5277         /* prepare assoc data */
5278
5279         ifmgd->beacon_crc_valid = false;
5280
5281         assoc_data->wmm = bss->wmm_used &&
5282                           (local->hw.queues >= IEEE80211_NUM_ACS);
5283
5284         /*
5285          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5286          * We still associate in non-HT mode (11a/b/g) if any one of these
5287          * ciphers is configured as pairwise.
5288          * We can set this to true for non-11n hardware, that'll be checked
5289          * separately along with the peer capabilities.
5290          */
5291         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5292                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5293                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5294                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5295                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5296                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5297                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5298                         netdev_info(sdata->dev,
5299                                     "disabling HE/HT/VHT due to WEP/TKIP use\n");
5300                 }
5301         }
5302
5303         /* Also disable HT if we don't support it or the AP doesn't use WMM */
5304         sband = local->hw.wiphy->bands[req->bss->channel->band];
5305         if (!sband->ht_cap.ht_supported ||
5306             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5307             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5308                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5309                 if (!bss->wmm_used &&
5310                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5311                         netdev_info(sdata->dev,
5312                                     "disabling HT as WMM/QoS is not supported by the AP\n");
5313         }
5314
5315         /* disable VHT if we don't support it or the AP doesn't use WMM */
5316         if (!sband->vht_cap.vht_supported ||
5317             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5318             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5319                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5320                 if (!bss->wmm_used &&
5321                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5322                         netdev_info(sdata->dev,
5323                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
5324         }
5325
5326         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5327         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5328                sizeof(ifmgd->ht_capa_mask));
5329
5330         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5331         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5332                sizeof(ifmgd->vht_capa_mask));
5333
5334         if (req->ie && req->ie_len) {
5335                 memcpy(assoc_data->ie, req->ie, req->ie_len);
5336                 assoc_data->ie_len = req->ie_len;
5337         }
5338
5339         if (req->fils_kek) {
5340                 /* should already be checked in cfg80211 - so warn */
5341                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5342                         err = -EINVAL;
5343                         goto err_free;
5344                 }
5345                 memcpy(assoc_data->fils_kek, req->fils_kek,
5346                        req->fils_kek_len);
5347                 assoc_data->fils_kek_len = req->fils_kek_len;
5348         }
5349
5350         if (req->fils_nonces)
5351                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5352                        2 * FILS_NONCE_LEN);
5353
5354         assoc_data->bss = req->bss;
5355
5356         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5357                 if (ifmgd->powersave)
5358                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5359                 else
5360                         sdata->smps_mode = IEEE80211_SMPS_OFF;
5361         } else
5362                 sdata->smps_mode = ifmgd->req_smps;
5363
5364         assoc_data->capability = req->bss->capability;
5365         assoc_data->supp_rates = bss->supp_rates;
5366         assoc_data->supp_rates_len = bss->supp_rates_len;
5367
5368         rcu_read_lock();
5369         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5370         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5371                 assoc_data->ap_ht_param =
5372                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5373         else
5374                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5375         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5376         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5377                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5378                        sizeof(struct ieee80211_vht_cap));
5379         else
5380                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5381         rcu_read_unlock();
5382
5383         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5384                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5385              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5386                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5387
5388         if (bss->wmm_used && bss->uapsd_supported &&
5389             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5390                 assoc_data->uapsd = true;
5391                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5392         } else {
5393                 assoc_data->uapsd = false;
5394                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5395         }
5396
5397         if (req->prev_bssid)
5398                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5399
5400         if (req->use_mfp) {
5401                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5402                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5403         } else {
5404                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5405                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5406         }
5407
5408         if (req->flags & ASSOC_REQ_USE_RRM)
5409                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5410         else
5411                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5412
5413         if (req->crypto.control_port)
5414                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5415         else
5416                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5417
5418         sdata->control_port_protocol = req->crypto.control_port_ethertype;
5419         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5420         sdata->control_port_over_nl80211 =
5421                                         req->crypto.control_port_over_nl80211;
5422         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5423                                                         sdata->vif.type);
5424
5425         /* kick off associate process */
5426
5427         ifmgd->assoc_data = assoc_data;
5428         ifmgd->dtim_period = 0;
5429         ifmgd->have_beacon = false;
5430
5431         /* override HT/VHT configuration only if the AP and we support it */
5432         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5433                 struct ieee80211_sta_ht_cap sta_ht_cap;
5434
5435                 if (req->flags & ASSOC_REQ_DISABLE_HT)
5436                         override = true;
5437
5438                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5439                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5440
5441                 /* check for 40 MHz disable override */
5442                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5443                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5444                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5445                         override = true;
5446
5447                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5448                     req->flags & ASSOC_REQ_DISABLE_VHT)
5449                         override = true;
5450         }
5451
5452         if (req->flags & ASSOC_REQ_DISABLE_HT) {
5453                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5454                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5455         }
5456
5457         if (req->flags & ASSOC_REQ_DISABLE_VHT)
5458                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5459
5460         err = ieee80211_prep_connection(sdata, req->bss, true, override);
5461         if (err)
5462                 goto err_clear;
5463
5464         rcu_read_lock();
5465         beacon_ies = rcu_dereference(req->bss->beacon_ies);
5466
5467         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5468             !beacon_ies) {
5469                 /*
5470                  * Wait up to one beacon interval ...
5471                  * should this be more if we miss one?
5472                  */
5473                 sdata_info(sdata, "waiting for beacon from %pM\n",
5474                            ifmgd->bssid);
5475                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5476                 assoc_data->timeout_started = true;
5477                 assoc_data->need_beacon = true;
5478         } else if (beacon_ies) {
5479                 const u8 *ie;
5480                 u8 dtim_count = 0;
5481
5482                 ieee80211_get_dtim(beacon_ies, &dtim_count,
5483                                    &ifmgd->dtim_period);
5484
5485                 ifmgd->have_beacon = true;
5486                 assoc_data->timeout = jiffies;
5487                 assoc_data->timeout_started = true;
5488
5489                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5490                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5491                         sdata->vif.bss_conf.sync_device_ts =
5492                                 bss->device_ts_beacon;
5493                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5494                 }
5495
5496                 ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
5497                                           beacon_ies->data, beacon_ies->len);
5498                 if (ie && ie[1] >= 3)
5499                         sdata->vif.bss_conf.profile_periodicity = ie[4];
5500
5501                 ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY,
5502                                       beacon_ies->data, beacon_ies->len);
5503                 if (ie && ie[1] >= 11 &&
5504                     (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5505                         sdata->vif.bss_conf.ema_ap = true;
5506         } else {
5507                 assoc_data->timeout = jiffies;
5508                 assoc_data->timeout_started = true;
5509         }
5510         rcu_read_unlock();
5511
5512         run_again(sdata, assoc_data->timeout);
5513
5514         if (bss->corrupt_data) {
5515                 char *corrupt_type = "data";
5516                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5517                         if (bss->corrupt_data &
5518                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
5519                                 corrupt_type = "beacon and probe response";
5520                         else
5521                                 corrupt_type = "beacon";
5522                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5523                         corrupt_type = "probe response";
5524                 sdata_info(sdata, "associating with AP with corrupt %s\n",
5525                            corrupt_type);
5526         }
5527
5528         return 0;
5529  err_clear:
5530         eth_zero_addr(ifmgd->bssid);
5531         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5532         ifmgd->assoc_data = NULL;
5533  err_free:
5534         kfree(assoc_data);
5535         return err;
5536 }
5537
5538 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5539                          struct cfg80211_deauth_request *req)
5540 {
5541         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5542         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5543         bool tx = !req->local_state_change;
5544
5545         if (ifmgd->auth_data &&
5546             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5547                 sdata_info(sdata,
5548                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5549                            req->bssid, req->reason_code,
5550                            ieee80211_get_reason_code_string(req->reason_code));
5551
5552                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5553                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5554                                                IEEE80211_STYPE_DEAUTH,
5555                                                req->reason_code, tx,
5556                                                frame_buf);
5557                 ieee80211_destroy_auth_data(sdata, false);
5558                 ieee80211_report_disconnect(sdata, frame_buf,
5559                                             sizeof(frame_buf), true,
5560                                             req->reason_code);
5561
5562                 return 0;
5563         }
5564
5565         if (ifmgd->assoc_data &&
5566             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5567                 sdata_info(sdata,
5568                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
5569                            req->bssid, req->reason_code,
5570                            ieee80211_get_reason_code_string(req->reason_code));
5571
5572                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5573                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5574                                                IEEE80211_STYPE_DEAUTH,
5575                                                req->reason_code, tx,
5576                                                frame_buf);
5577                 ieee80211_destroy_assoc_data(sdata, false, true);
5578                 ieee80211_report_disconnect(sdata, frame_buf,
5579                                             sizeof(frame_buf), true,
5580                                             req->reason_code);
5581                 return 0;
5582         }
5583
5584         if (ifmgd->associated &&
5585             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5586                 sdata_info(sdata,
5587                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5588                            req->bssid, req->reason_code,
5589                            ieee80211_get_reason_code_string(req->reason_code));
5590
5591                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5592                                        req->reason_code, tx, frame_buf);
5593                 ieee80211_report_disconnect(sdata, frame_buf,
5594                                             sizeof(frame_buf), true,
5595                                             req->reason_code);
5596                 return 0;
5597         }
5598
5599         return -ENOTCONN;
5600 }
5601
5602 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5603                            struct cfg80211_disassoc_request *req)
5604 {
5605         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5606         u8 bssid[ETH_ALEN];
5607         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5608
5609         /*
5610          * cfg80211 should catch this ... but it's racy since
5611          * we can receive a disassoc frame, process it, hand it
5612          * to cfg80211 while that's in a locked section already
5613          * trying to tell us that the user wants to disconnect.
5614          */
5615         if (ifmgd->associated != req->bss)
5616                 return -ENOLINK;
5617
5618         sdata_info(sdata,
5619                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5620                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5621
5622         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5623         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5624                                req->reason_code, !req->local_state_change,
5625                                frame_buf);
5626
5627         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5628                                     req->reason_code);
5629
5630         return 0;
5631 }
5632
5633 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5634 {
5635         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5636
5637         /*
5638          * Make sure some work items will not run after this,
5639          * they will not do anything but might not have been
5640          * cancelled when disconnecting.
5641          */
5642         cancel_work_sync(&ifmgd->monitor_work);
5643         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5644         cancel_work_sync(&ifmgd->request_smps_work);
5645         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5646         cancel_work_sync(&ifmgd->chswitch_work);
5647         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5648
5649         sdata_lock(sdata);
5650         if (ifmgd->assoc_data) {
5651                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5652                 ieee80211_destroy_assoc_data(sdata, false, false);
5653                 cfg80211_assoc_timeout(sdata->dev, bss);
5654         }
5655         if (ifmgd->auth_data)
5656                 ieee80211_destroy_auth_data(sdata, false);
5657         spin_lock_bh(&ifmgd->teardown_lock);
5658         if (ifmgd->teardown_skb) {
5659                 kfree_skb(ifmgd->teardown_skb);
5660                 ifmgd->teardown_skb = NULL;
5661                 ifmgd->orig_teardown_skb = NULL;
5662         }
5663         kfree(ifmgd->assoc_req_ies);
5664         ifmgd->assoc_req_ies = NULL;
5665         ifmgd->assoc_req_ies_len = 0;
5666         spin_unlock_bh(&ifmgd->teardown_lock);
5667         del_timer_sync(&ifmgd->timer);
5668         sdata_unlock(sdata);
5669 }
5670
5671 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5672                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5673                                s32 rssi_level,
5674                                gfp_t gfp)
5675 {
5676         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5677
5678         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5679
5680         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5681 }
5682 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5683
5684 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5685 {
5686         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5687
5688         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5689
5690         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5691 }
5692 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);