net/mac80211/mlme.c

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