net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <[email protected]>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <[email protected]>
   7  * Copyright 2007, Michael Wu <[email protected]>
   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                              struct cfg80211_chan_def *chandef, bool tracking)
 153 {
 154         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 155         struct cfg80211_chan_def vht_chandef;
 156         struct ieee80211_sta_ht_cap sta_ht_cap;
 157         u32 ht_cfreq, ret;
 158
 159         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 160         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 161
 162         chandef->chan = channel;
 163         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 164         chandef->center_freq1 = channel->center_freq;
 165         chandef->center_freq2 = 0;
 166
 167         if (!ht_oper || !sta_ht_cap.ht_supported) {
 168                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 169                 goto out;
 170         }
 171
 172         chandef->width = NL80211_CHAN_WIDTH_20;
 173
 174         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 175                                                   channel->band);
 176         /* check that channel matches the right operating channel */
 177         if (!tracking && channel->center_freq != ht_cfreq) {
 178                 /*
 179                  * It's possible that some APs are confused here;
 180                  * Netgear WNDR3700 sometimes reports 4 higher than
 181                  * the actual channel in association responses, but
 182                  * since we look at probe response/beacon data here
 183                  * it should be OK.
 184                  */
 185                 sdata_info(sdata,
 186                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 187                            channel->center_freq, ht_cfreq,
 188                            ht_oper->primary_chan, channel->band);
 189                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 190                 goto out;
 191         }
 192
 193         /* check 40 MHz support, if we have it */
 194         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 195                 ieee80211_chandef_ht_oper(ht_oper, chandef);
 196         } else {
 197                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 198                 ret = IEEE80211_STA_DISABLE_VHT;
 199                 /* also mark 40 MHz disabled */
 200                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 201                 goto out;
 202         }
 203
 204         if (!vht_oper || !sband->vht_cap.vht_supported) {
 205                 ret = IEEE80211_STA_DISABLE_VHT;
 206                 goto out;
 207         }
 208
 209         vht_chandef = *chandef;
 210         if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
 211                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 212                         sdata_info(sdata,
 213                                    "AP VHT information is invalid, disable VHT\n");
 214                 ret = IEEE80211_STA_DISABLE_VHT;
 215                 goto out;
 216         }
 217
 218         if (!cfg80211_chandef_valid(&vht_chandef)) {
 219                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 220                         sdata_info(sdata,
 221                                    "AP VHT information is invalid, disable VHT\n");
 222                 ret = IEEE80211_STA_DISABLE_VHT;
 223                 goto out;
 224         }
 225
 226         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 227                 ret = 0;
 228                 goto out;
 229         }
 230
 231         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 232                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 233                         sdata_info(sdata,
 234                                    "AP VHT information doesn't match HT, disable VHT\n");
 235                 ret = IEEE80211_STA_DISABLE_VHT;
 236                 goto out;
 237         }
 238
 239         *chandef = vht_chandef;
 240
 241         ret = 0;
 242
 243 out:
 244         /*
 245          * When tracking the current AP, don't do any further checks if the
 246          * new chandef is identical to the one we're currently using for the
 247          * connection. This keeps us from playing ping-pong with regulatory,
 248          * without it the following can happen (for example):
 249          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 250          *  - AP advertises regdom US
 251          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 252          *  - the code below detects an unsupported channel, downgrades, and
 253          *    we disconnect from the AP in the caller
 254          *  - disconnect causes CRDA to reload world regdomain and the game
 255          *    starts anew.
 256          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 257          *
 258          * It seems possible that there are still scenarios with CSA or real
 259          * bandwidth changes where a this could happen, but those cases are
 260          * less common and wouldn't completely prevent using the AP.
 261          */
 262         if (tracking &&
 263             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 264                 return ret;
 265
 266         /* don't print the message below for VHT mismatch if VHT is disabled */
 267         if (ret & IEEE80211_STA_DISABLE_VHT)
 268                 vht_chandef = *chandef;
 269
 270         /*
 271          * Ignore the DISABLED flag when we're already connected and only
 272          * tracking the APs beacon for bandwidth changes - otherwise we
 273          * might get disconnected here if we connect to an AP, update our
 274          * regulatory information based on the AP's country IE and the
 275          * information we have is wrong/outdated and disables the channel
 276          * that we're actually using for the connection to the AP.
 277          */
 278         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 279                                         tracking ? 0 :
 280                                                    IEEE80211_CHAN_DISABLED)) {
 281                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 282                         ret = IEEE80211_STA_DISABLE_HT |
 283                               IEEE80211_STA_DISABLE_VHT;
 284                         break;
 285                 }
 286
 287                 ret |= ieee80211_chandef_downgrade(chandef);
 288         }
 289
 290         if (chandef->width != vht_chandef.width && !tracking)
 291                 sdata_info(sdata,
 292                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 293
 294         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 295         return ret;
 296 }
 297
 298 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 299                                struct sta_info *sta,
 300                                const struct ieee80211_ht_cap *ht_cap,
 301                                const struct ieee80211_ht_operation *ht_oper,
 302                                const struct ieee80211_vht_operation *vht_oper,
 303                                const u8 *bssid, u32 *changed)
 304 {
 305         struct ieee80211_local *local = sdata->local;
 306         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 307         struct ieee80211_supported_band *sband;
 308         struct ieee80211_channel *chan;
 309         struct cfg80211_chan_def chandef;
 310         u16 ht_opmode;
 311         u32 flags;
 312         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 313         int ret;
 314
 315         /* if HT was/is disabled, don't track any bandwidth changes */
 316         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 317                 return 0;
 318
 319         /* don't check VHT if we associated as non-VHT station */
 320         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 321                 vht_oper = NULL;
 322
 323         if (WARN_ON_ONCE(!sta))
 324                 return -EINVAL;
 325
 326         /*
 327          * if bss configuration changed store the new one -
 328          * this may be applicable even if channel is identical
 329          */
 330         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 331         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 332                 *changed |= BSS_CHANGED_HT;
 333                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 334         }
 335
 336         chan = sdata->vif.bss_conf.chandef.chan;
 337         sband = local->hw.wiphy->bands[chan->band];
 338
 339         /* calculate new channel (type) based on HT/VHT operation IEs */
 340         flags = ieee80211_determine_chantype(sdata, sband, chan,
 341                                              ht_oper, vht_oper,
 342                                              &chandef, true);
 343
 344         /*
 345          * Downgrade the new channel if we associated with restricted
 346          * capabilities. For example, if we associated as a 20 MHz STA
 347          * to a 40 MHz AP (due to regulatory, capabilities or config
 348          * reasons) then switching to a 40 MHz channel now won't do us
 349          * any good -- we couldn't use it with the AP.
 350          */
 351         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 352             chandef.width == NL80211_CHAN_WIDTH_80P80)
 353                 flags |= ieee80211_chandef_downgrade(&chandef);
 354         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 355             chandef.width == NL80211_CHAN_WIDTH_160)
 356                 flags |= ieee80211_chandef_downgrade(&chandef);
 357         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 358             chandef.width > NL80211_CHAN_WIDTH_20)
 359                 flags |= ieee80211_chandef_downgrade(&chandef);
 360
 361         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 362                 return 0;
 363
 364         sdata_info(sdata,
 365                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 366                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 367                    chandef.center_freq1, chandef.center_freq2);
 368
 369         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 370                                       IEEE80211_STA_DISABLE_VHT |
 371                                       IEEE80211_STA_DISABLE_40MHZ |
 372                                       IEEE80211_STA_DISABLE_80P80MHZ |
 373                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 374             !cfg80211_chandef_valid(&chandef)) {
 375                 sdata_info(sdata,
 376                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 377                            ifmgd->bssid);
 378                 return -EINVAL;
 379         }
 380
 381         switch (chandef.width) {
 382         case NL80211_CHAN_WIDTH_20_NOHT:
 383         case NL80211_CHAN_WIDTH_20:
 384                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 385                 break;
 386         case NL80211_CHAN_WIDTH_40:
 387                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 388                 break;
 389         case NL80211_CHAN_WIDTH_80:
 390                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 391                 break;
 392         case NL80211_CHAN_WIDTH_80P80:
 393         case NL80211_CHAN_WIDTH_160:
 394                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 395                 break;
 396         default:
 397                 return -EINVAL;
 398         }
 399
 400         if (new_sta_bw > sta->cur_max_bandwidth)
 401                 new_sta_bw = sta->cur_max_bandwidth;
 402
 403         if (new_sta_bw < sta->sta.bandwidth) {
 404                 sta->sta.bandwidth = new_sta_bw;
 405                 rate_control_rate_update(local, sband, sta,
 406                                          IEEE80211_RC_BW_CHANGED);
 407         }
 408
 409         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 410         if (ret) {
 411                 sdata_info(sdata,
 412                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 413                            ifmgd->bssid);
 414                 return ret;
 415         }
 416
 417         if (new_sta_bw > sta->sta.bandwidth) {
 418                 sta->sta.bandwidth = new_sta_bw;
 419                 rate_control_rate_update(local, sband, sta,
 420                                          IEEE80211_RC_BW_CHANGED);
 421         }
 422
 423         return 0;
 424 }
 425
 426 /* frame sending functions */
 427
 428 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 429                                 struct sk_buff *skb, u8 ap_ht_param,
 430                                 struct ieee80211_supported_band *sband,
 431                                 struct ieee80211_channel *channel,
 432                                 enum ieee80211_smps_mode smps)
 433 {
 434         u8 *pos;
 435         u32 flags = channel->flags;
 436         u16 cap;
 437         struct ieee80211_sta_ht_cap ht_cap;
 438
 439         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 440
 441         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 442         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 443
 444         /* determine capability flags */
 445         cap = ht_cap.cap;
 446
 447         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 448         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 449                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 450                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 451                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 452                 }
 453                 break;
 454         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 455                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 456                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 457                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 458                 }
 459                 break;
 460         }
 461
 462         /*
 463          * If 40 MHz was disabled associate as though we weren't
 464          * capable of 40 MHz -- some broken APs will never fall
 465          * back to trying to transmit in 20 MHz.
 466          */
 467         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 468                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 469                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 470         }
 471
 472         /* set SM PS mode properly */
 473         cap &= ~IEEE80211_HT_CAP_SM_PS;
 474         switch (smps) {
 475         case IEEE80211_SMPS_AUTOMATIC:
 476         case IEEE80211_SMPS_NUM_MODES:
 477                 WARN_ON(1);
 478                 /* fall through */
 479         case IEEE80211_SMPS_OFF:
 480                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 481                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 482                 break;
 483         case IEEE80211_SMPS_STATIC:
 484                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 485                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 486                 break;
 487         case IEEE80211_SMPS_DYNAMIC:
 488                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 489                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 490                 break;
 491         }
 492
 493         /* reserve and fill IE */
 494         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 495         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 496 }
 497
 498 /* This function determines vht capability flags for the association
 499  * and builds the IE.
 500  * Note - the function may set the owner of the MU-MIMO capability
 501  */
 502 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 503                                  struct sk_buff *skb,
 504                                  struct ieee80211_supported_band *sband,
 505                                  struct ieee80211_vht_cap *ap_vht_cap)
 506 {
 507         struct ieee80211_local *local = sdata->local;
 508         u8 *pos;
 509         u32 cap;
 510         struct ieee80211_sta_vht_cap vht_cap;
 511         u32 mask, ap_bf_sts, our_bf_sts;
 512
 513         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 514
 515         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 516         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 517
 518         /* determine capability flags */
 519         cap = vht_cap.cap;
 520
 521         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 522                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 523
 524                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 525                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 526                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 527                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 528         }
 529
 530         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 531                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 532                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 533         }
 534
 535         /*
 536          * Some APs apparently get confused if our capabilities are better
 537          * than theirs, so restrict what we advertise in the assoc request.
 538          */
 539         if (!(ap_vht_cap->vht_cap_info &
 540                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 541                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 542                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 543         else if (!(ap_vht_cap->vht_cap_info &
 544                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 545                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 546
 547         /*
 548          * If some other vif is using the MU-MIMO capablity we cannot associate
 549          * using MU-MIMO - this will lead to contradictions in the group-id
 550          * mechanism.
 551          * Ownership is defined since association request, in order to avoid
 552          * simultaneous associations with MU-MIMO.
 553          */
 554         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 555                 bool disable_mu_mimo = false;
 556                 struct ieee80211_sub_if_data *other;
 557
 558                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 559                         if (other->vif.mu_mimo_owner) {
 560                                 disable_mu_mimo = true;
 561                                 break;
 562                         }
 563                 }
 564                 if (disable_mu_mimo)
 565                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 566                 else
 567                         sdata->vif.mu_mimo_owner = true;
 568         }
 569
 570         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 571
 572         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 573         our_bf_sts = cap & mask;
 574
 575         if (ap_bf_sts < our_bf_sts) {
 576                 cap &= ~mask;
 577                 cap |= ap_bf_sts;
 578         }
 579
 580         /* reserve and fill IE */
 581         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 582         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 583 }
 584
 585 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 586 {
 587         struct ieee80211_local *local = sdata->local;
 588         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 589         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 590         struct sk_buff *skb;
 591         struct ieee80211_mgmt *mgmt;
 592         u8 *pos, qos_info;
 593         size_t offset = 0, noffset;
 594         int i, count, rates_len, supp_rates_len, shift;
 595         u16 capab;
 596         struct ieee80211_supported_band *sband;
 597         struct ieee80211_chanctx_conf *chanctx_conf;
 598         struct ieee80211_channel *chan;
 599         u32 rates = 0;
 600
 601         sdata_assert_lock(sdata);
 602
 603         rcu_read_lock();
 604         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 605         if (WARN_ON(!chanctx_conf)) {
 606                 rcu_read_unlock();
 607                 return;
 608         }
 609         chan = chanctx_conf->def.chan;
 610         rcu_read_unlock();
 611         sband = local->hw.wiphy->bands[chan->band];
 612         shift = ieee80211_vif_get_shift(&sdata->vif);
 613
 614         if (assoc_data->supp_rates_len) {
 615                 /*
 616                  * Get all rates supported by the device and the AP as
 617                  * some APs don't like getting a superset of their rates
 618                  * in the association request (e.g. D-Link DAP 1353 in
 619                  * b-only mode)...
 620                  */
 621                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 622                                                      assoc_data->supp_rates,
 623                                                      assoc_data->supp_rates_len,
 624                                                      &rates);
 625         } else {
 626                 /*
 627                  * In case AP not provide any supported rates information
 628                  * before association, we send information element(s) with
 629                  * all rates that we support.
 630                  */
 631                 rates_len = 0;
 632                 for (i = 0; i < sband->n_bitrates; i++) {
 633                         rates |= BIT(i);
 634                         rates_len++;
 635                 }
 636         }
 637
 638         skb = alloc_skb(local->hw.extra_tx_headroom +
 639                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 640                         2 + assoc_data->ssid_len + /* SSID */
 641                         4 + rates_len + /* (extended) rates */
 642                         4 + /* power capability */
 643                         2 + 2 * sband->n_channels + /* supported channels */
 644                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 645                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 646                         assoc_data->ie_len + /* extra IEs */
 647                         (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
 648                         9, /* WMM */
 649                         GFP_KERNEL);
 650         if (!skb)
 651                 return;
 652
 653         skb_reserve(skb, local->hw.extra_tx_headroom);
 654
 655         capab = WLAN_CAPABILITY_ESS;
 656
 657         if (sband->band == NL80211_BAND_2GHZ) {
 658                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 659                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 660         }
 661
 662         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 663                 capab |= WLAN_CAPABILITY_PRIVACY;
 664
 665         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 666             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 667                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 668
 669         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 670                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 671
 672         mgmt = skb_put_zero(skb, 24);
 673         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 674         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 675         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 676
 677         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 678                 skb_put(skb, 10);
 679                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 680                                                   IEEE80211_STYPE_REASSOC_REQ);
 681                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 682                 mgmt->u.reassoc_req.listen_interval =
 683                                 cpu_to_le16(local->hw.conf.listen_interval);
 684                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 685                        ETH_ALEN);
 686         } else {
 687                 skb_put(skb, 4);
 688                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 689                                                   IEEE80211_STYPE_ASSOC_REQ);
 690                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 691                 mgmt->u.assoc_req.listen_interval =
 692                                 cpu_to_le16(local->hw.conf.listen_interval);
 693         }
 694
 695         /* SSID */
 696         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 697         *pos++ = WLAN_EID_SSID;
 698         *pos++ = assoc_data->ssid_len;
 699         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 700
 701         /* add all rates which were marked to be used above */
 702         supp_rates_len = rates_len;
 703         if (supp_rates_len > 8)
 704                 supp_rates_len = 8;
 705
 706         pos = skb_put(skb, supp_rates_len + 2);
 707         *pos++ = WLAN_EID_SUPP_RATES;
 708         *pos++ = supp_rates_len;
 709
 710         count = 0;
 711         for (i = 0; i < sband->n_bitrates; i++) {
 712                 if (BIT(i) & rates) {
 713                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 714                                                 5 * (1 << shift));
 715                         *pos++ = (u8) rate;
 716                         if (++count == 8)
 717                                 break;
 718                 }
 719         }
 720
 721         if (rates_len > count) {
 722                 pos = skb_put(skb, rates_len - count + 2);
 723                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 724                 *pos++ = rates_len - count;
 725
 726                 for (i++; i < sband->n_bitrates; i++) {
 727                         if (BIT(i) & rates) {
 728                                 int rate;
 729                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 730                                                     5 * (1 << shift));
 731                                 *pos++ = (u8) rate;
 732                         }
 733                 }
 734         }
 735
 736         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 737             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 738                 pos = skb_put(skb, 4);
 739                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 740                 *pos++ = 2;
 741                 *pos++ = 0; /* min tx power */
 742                  /* max tx power */
 743                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 744         }
 745
 746         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 747                 /* TODO: get this in reg domain format */
 748                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 749                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 750                 *pos++ = 2 * sband->n_channels;
 751                 for (i = 0; i < sband->n_channels; i++) {
 752                         *pos++ = ieee80211_frequency_to_channel(
 753                                         sband->channels[i].center_freq);
 754                         *pos++ = 1; /* one channel in the subband*/
 755                 }
 756         }
 757
 758         /* if present, add any custom IEs that go before HT */
 759         if (assoc_data->ie_len) {
 760                 static const u8 before_ht[] = {
 761                         WLAN_EID_SSID,
 762                         WLAN_EID_SUPP_RATES,
 763                         WLAN_EID_EXT_SUPP_RATES,
 764                         WLAN_EID_PWR_CAPABILITY,
 765                         WLAN_EID_SUPPORTED_CHANNELS,
 766                         WLAN_EID_RSN,
 767                         WLAN_EID_QOS_CAPA,
 768                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 769                         WLAN_EID_MOBILITY_DOMAIN,
 770                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 771                         WLAN_EID_RIC_DATA,              /* reassoc only */
 772                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 773                 };
 774                 static const u8 after_ric[] = {
 775                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 776                         WLAN_EID_HT_CAPABILITY,
 777                         WLAN_EID_BSS_COEX_2040,
 778                         /* luckily this is almost always there */
 779                         WLAN_EID_EXT_CAPABILITY,
 780                         WLAN_EID_QOS_TRAFFIC_CAPA,
 781                         WLAN_EID_TIM_BCAST_REQ,
 782                         WLAN_EID_INTERWORKING,
 783                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
 784                         WLAN_EID_VHT_CAPABILITY,
 785                         WLAN_EID_OPMODE_NOTIF,
 786                 };
 787
 788                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 789                                                  assoc_data->ie_len,
 790                                                  before_ht,
 791                                                  ARRAY_SIZE(before_ht),
 792                                                  after_ric,
 793                                                  ARRAY_SIZE(after_ric),
 794                                                  offset);
 795                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 796                 offset = noffset;
 797         }
 798
 799         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 800                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 801                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 802
 803         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 804                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 805                                     sband, chan, sdata->smps_mode);
 806
 807         /* if present, add any custom IEs that go before VHT */
 808         if (assoc_data->ie_len) {
 809                 static const u8 before_vht[] = {
 810                         /*
 811                          * no need to list the ones split off before HT
 812                          * or generated here
 813                          */
 814                         WLAN_EID_BSS_COEX_2040,
 815                         WLAN_EID_EXT_CAPABILITY,
 816                         WLAN_EID_QOS_TRAFFIC_CAPA,
 817                         WLAN_EID_TIM_BCAST_REQ,
 818                         WLAN_EID_INTERWORKING,
 819                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
 820                 };
 821
 822                 /* RIC already taken above, so no need to handle here anymore */
 823                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 824                                              before_vht, ARRAY_SIZE(before_vht),
 825                                              offset);
 826                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 827                 offset = noffset;
 828         }
 829
 830         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 831                 ieee80211_add_vht_ie(sdata, skb, sband,
 832                                      &assoc_data->ap_vht_cap);
 833
 834         /* if present, add any custom non-vendor IEs that go after HT */
 835         if (assoc_data->ie_len) {
 836                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 837                                                     assoc_data->ie_len,
 838                                                     offset);
 839                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 840                 offset = noffset;
 841         }
 842
 843         if (assoc_data->wmm) {
 844                 if (assoc_data->uapsd) {
 845                         qos_info = ifmgd->uapsd_queues;
 846                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 847                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 848                 } else {
 849                         qos_info = 0;
 850                 }
 851
 852                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 853         }
 854
 855         /* add any remaining custom (i.e. vendor specific here) IEs */
 856         if (assoc_data->ie_len) {
 857                 noffset = assoc_data->ie_len;
 858                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 859         }
 860
 861         if (assoc_data->fils_kek_len &&
 862             fils_encrypt_assoc_req(skb, assoc_data) < 0) {
 863                 dev_kfree_skb(skb);
 864                 return;
 865         }
 866
 867         drv_mgd_prepare_tx(local, sdata, 0);
 868
 869         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 870         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 871                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 872                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 873         ieee80211_tx_skb(sdata, skb);
 874 }
 875
 876 void ieee80211_send_pspoll(struct ieee80211_local *local,
 877                            struct ieee80211_sub_if_data *sdata)
 878 {
 879         struct ieee80211_pspoll *pspoll;
 880         struct sk_buff *skb;
 881
 882         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 883         if (!skb)
 884                 return;
 885
 886         pspoll = (struct ieee80211_pspoll *) skb->data;
 887         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 888
 889         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 890         ieee80211_tx_skb(sdata, skb);
 891 }
 892
 893 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 894                              struct ieee80211_sub_if_data *sdata,
 895                              bool powersave)
 896 {
 897         struct sk_buff *skb;
 898         struct ieee80211_hdr_3addr *nullfunc;
 899         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 900
 901         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
 902                 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
 903         if (!skb)
 904                 return;
 905
 906         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 907         if (powersave)
 908                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 909
 910         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 911                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 912
 913         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 914                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 915
 916         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 917                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 918
 919         ieee80211_tx_skb(sdata, skb);
 920 }
 921
 922 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 923                                           struct ieee80211_sub_if_data *sdata)
 924 {
 925         struct sk_buff *skb;
 926         struct ieee80211_hdr *nullfunc;
 927         __le16 fc;
 928
 929         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 930                 return;
 931
 932         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 933         if (!skb)
 934                 return;
 935
 936         skb_reserve(skb, local->hw.extra_tx_headroom);
 937
 938         nullfunc = skb_put_zero(skb, 30);
 939         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 940                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 941         nullfunc->frame_control = fc;
 942         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 943         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 944         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 945         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 946
 947         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 948         ieee80211_tx_skb(sdata, skb);
 949 }
 950
 951 /* spectrum management related things */
 952 static void ieee80211_chswitch_work(struct work_struct *work)
 953 {
 954         struct ieee80211_sub_if_data *sdata =
 955                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 956         struct ieee80211_local *local = sdata->local;
 957         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 958         int ret;
 959
 960         if (!ieee80211_sdata_running(sdata))
 961                 return;
 962
 963         sdata_lock(sdata);
 964         mutex_lock(&local->mtx);
 965         mutex_lock(&local->chanctx_mtx);
 966
 967         if (!ifmgd->associated)
 968                 goto out;
 969
 970         if (!sdata->vif.csa_active)
 971                 goto out;
 972
 973         /*
 974          * using reservation isn't immediate as it may be deferred until later
 975          * with multi-vif. once reservation is complete it will re-schedule the
 976          * work with no reserved_chanctx so verify chandef to check if it
 977          * completed successfully
 978          */
 979
 980         if (sdata->reserved_chanctx) {
 981                 /*
 982                  * with multi-vif csa driver may call ieee80211_csa_finish()
 983                  * many times while waiting for other interfaces to use their
 984                  * reservations
 985                  */
 986                 if (sdata->reserved_ready)
 987                         goto out;
 988
 989                 ret = ieee80211_vif_use_reserved_context(sdata);
 990                 if (ret) {
 991                         sdata_info(sdata,
 992                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
 993                                    ret);
 994                         ieee80211_queue_work(&sdata->local->hw,
 995                                              &ifmgd->csa_connection_drop_work);
 996                         goto out;
 997                 }
 998
 999                 goto out;
1000         }
1001
1002         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1003                                         &sdata->csa_chandef)) {
1004                 sdata_info(sdata,
1005                            "failed to finalize channel switch, disconnecting\n");
1006                 ieee80211_queue_work(&sdata->local->hw,
1007                                      &ifmgd->csa_connection_drop_work);
1008                 goto out;
1009         }
1010
1011         /* XXX: shouldn't really modify cfg80211-owned data! */
1012         ifmgd->associated->channel = sdata->csa_chandef.chan;
1013
1014         ifmgd->csa_waiting_bcn = true;
1015
1016         ieee80211_sta_reset_beacon_monitor(sdata);
1017         ieee80211_sta_reset_conn_monitor(sdata);
1018
1019 out:
1020         mutex_unlock(&local->chanctx_mtx);
1021         mutex_unlock(&local->mtx);
1022         sdata_unlock(sdata);
1023 }
1024
1025 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1026 {
1027         struct ieee80211_local *local = sdata->local;
1028         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1029         int ret;
1030
1031         sdata_assert_lock(sdata);
1032
1033         WARN_ON(!sdata->vif.csa_active);
1034
1035         if (sdata->csa_block_tx) {
1036                 ieee80211_wake_vif_queues(local, sdata,
1037                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1038                 sdata->csa_block_tx = false;
1039         }
1040
1041         sdata->vif.csa_active = false;
1042         ifmgd->csa_waiting_bcn = false;
1043
1044         ret = drv_post_channel_switch(sdata);
1045         if (ret) {
1046                 sdata_info(sdata,
1047                            "driver post channel switch failed, disconnecting\n");
1048                 ieee80211_queue_work(&local->hw,
1049                                      &ifmgd->csa_connection_drop_work);
1050                 return;
1051         }
1052
1053         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1054 }
1055
1056 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1057 {
1058         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1059         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1060
1061         trace_api_chswitch_done(sdata, success);
1062         if (!success) {
1063                 sdata_info(sdata,
1064                            "driver channel switch failed, disconnecting\n");
1065                 ieee80211_queue_work(&sdata->local->hw,
1066                                      &ifmgd->csa_connection_drop_work);
1067         } else {
1068                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1069         }
1070 }
1071 EXPORT_SYMBOL(ieee80211_chswitch_done);
1072
1073 static void ieee80211_chswitch_timer(struct timer_list *t)
1074 {
1075         struct ieee80211_sub_if_data *sdata =
1076                 from_timer(sdata, t, u.mgd.chswitch_timer);
1077
1078         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1079 }
1080
1081 static void
1082 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1083                                  u64 timestamp, u32 device_timestamp,
1084                                  struct ieee802_11_elems *elems,
1085                                  bool beacon)
1086 {
1087         struct ieee80211_local *local = sdata->local;
1088         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1089         struct cfg80211_bss *cbss = ifmgd->associated;
1090         struct ieee80211_chanctx_conf *conf;
1091         struct ieee80211_chanctx *chanctx;
1092         enum nl80211_band current_band;
1093         struct ieee80211_csa_ie csa_ie;
1094         struct ieee80211_channel_switch ch_switch;
1095         int res;
1096
1097         sdata_assert_lock(sdata);
1098
1099         if (!cbss)
1100                 return;
1101
1102         if (local->scanning)
1103                 return;
1104
1105         /* disregard subsequent announcements if we are already processing */
1106         if (sdata->vif.csa_active)
1107                 return;
1108
1109         current_band = cbss->channel->band;
1110         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1111                                            ifmgd->flags,
1112                                            ifmgd->associated->bssid, &csa_ie);
1113         if (res < 0)
1114                 ieee80211_queue_work(&local->hw,
1115                                      &ifmgd->csa_connection_drop_work);
1116         if (res)
1117                 return;
1118
1119         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1120                                      IEEE80211_CHAN_DISABLED)) {
1121                 sdata_info(sdata,
1122                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1123                            ifmgd->associated->bssid,
1124                            csa_ie.chandef.chan->center_freq,
1125                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1126                            csa_ie.chandef.center_freq2);
1127                 ieee80211_queue_work(&local->hw,
1128                                      &ifmgd->csa_connection_drop_work);
1129                 return;
1130         }
1131
1132         if (cfg80211_chandef_identical(&csa_ie.chandef,
1133                                        &sdata->vif.bss_conf.chandef)) {
1134                 if (ifmgd->csa_ignored_same_chan)
1135                         return;
1136                 sdata_info(sdata,
1137                            "AP %pM tries to chanswitch to same channel, ignore\n",
1138                            ifmgd->associated->bssid);
1139                 ifmgd->csa_ignored_same_chan = true;
1140                 return;
1141         }
1142
1143         /*
1144          * Drop all TDLS peers - either we disconnect or move to a different
1145          * channel from this point on. There's no telling what our peer will do.
1146          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1147          * have an incompatible wider chandef.
1148          */
1149         ieee80211_teardown_tdls_peers(sdata);
1150
1151         mutex_lock(&local->mtx);
1152         mutex_lock(&local->chanctx_mtx);
1153         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1154                                          lockdep_is_held(&local->chanctx_mtx));
1155         if (!conf) {
1156                 sdata_info(sdata,
1157                            "no channel context assigned to vif?, disconnecting\n");
1158                 goto drop_connection;
1159         }
1160
1161         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1162
1163         if (local->use_chanctx &&
1164             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1165                 sdata_info(sdata,
1166                            "driver doesn't support chan-switch with channel contexts\n");
1167                 goto drop_connection;
1168         }
1169
1170         ch_switch.timestamp = timestamp;
1171         ch_switch.device_timestamp = device_timestamp;
1172         ch_switch.block_tx = csa_ie.mode;
1173         ch_switch.chandef = csa_ie.chandef;
1174         ch_switch.count = csa_ie.count;
1175
1176         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1177                 sdata_info(sdata,
1178                            "preparing for channel switch failed, disconnecting\n");
1179                 goto drop_connection;
1180         }
1181
1182         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1183                                             chanctx->mode, false);
1184         if (res) {
1185                 sdata_info(sdata,
1186                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1187                            res);
1188                 goto drop_connection;
1189         }
1190         mutex_unlock(&local->chanctx_mtx);
1191
1192         sdata->vif.csa_active = true;
1193         sdata->csa_chandef = csa_ie.chandef;
1194         sdata->csa_block_tx = csa_ie.mode;
1195         ifmgd->csa_ignored_same_chan = false;
1196
1197         if (sdata->csa_block_tx)
1198                 ieee80211_stop_vif_queues(local, sdata,
1199                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1200         mutex_unlock(&local->mtx);
1201
1202         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1203                                           csa_ie.count);
1204
1205         if (local->ops->channel_switch) {
1206                 /* use driver's channel switch callback */
1207                 drv_channel_switch(local, sdata, &ch_switch);
1208                 return;
1209         }
1210
1211         /* channel switch handled in software */
1212         if (csa_ie.count <= 1)
1213                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1214         else
1215                 mod_timer(&ifmgd->chswitch_timer,
1216                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1217                                          cbss->beacon_interval));
1218         return;
1219  drop_connection:
1220         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1221         mutex_unlock(&local->chanctx_mtx);
1222         mutex_unlock(&local->mtx);
1223 }
1224
1225 static bool
1226 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1227                                  struct ieee80211_channel *channel,
1228                                  const u8 *country_ie, u8 country_ie_len,
1229                                  const u8 *pwr_constr_elem,
1230                                  int *chan_pwr, int *pwr_reduction)
1231 {
1232         struct ieee80211_country_ie_triplet *triplet;
1233         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1234         int i, chan_increment;
1235         bool have_chan_pwr = false;
1236
1237         /* Invalid IE */
1238         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1239                 return false;
1240
1241         triplet = (void *)(country_ie + 3);
1242         country_ie_len -= 3;
1243
1244         switch (channel->band) {
1245         default:
1246                 WARN_ON_ONCE(1);
1247                 /* fall through */
1248         case NL80211_BAND_2GHZ:
1249         case NL80211_BAND_60GHZ:
1250                 chan_increment = 1;
1251                 break;
1252         case NL80211_BAND_5GHZ:
1253                 chan_increment = 4;
1254                 break;
1255         }
1256
1257         /* find channel */
1258         while (country_ie_len >= 3) {
1259                 u8 first_channel = triplet->chans.first_channel;
1260
1261                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1262                         goto next;
1263
1264                 for (i = 0; i < triplet->chans.num_channels; i++) {
1265                         if (first_channel + i * chan_increment == chan) {
1266                                 have_chan_pwr = true;
1267                                 *chan_pwr = triplet->chans.max_power;
1268                                 break;
1269                         }
1270                 }
1271                 if (have_chan_pwr)
1272                         break;
1273
1274  next:
1275                 triplet++;
1276                 country_ie_len -= 3;
1277         }
1278
1279         if (have_chan_pwr && pwr_constr_elem)
1280                 *pwr_reduction = *pwr_constr_elem;
1281         else
1282                 *pwr_reduction = 0;
1283
1284         return have_chan_pwr;
1285 }
1286
1287 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1288                                       struct ieee80211_channel *channel,
1289                                       const u8 *cisco_dtpc_ie,
1290                                       int *pwr_level)
1291 {
1292         /* From practical testing, the first data byte of the DTPC element
1293          * seems to contain the requested dBm level, and the CLI on Cisco
1294          * APs clearly state the range is -127 to 127 dBm, which indicates
1295          * a signed byte, although it seemingly never actually goes negative.
1296          * The other byte seems to always be zero.
1297          */
1298         *pwr_level = (__s8)cisco_dtpc_ie[4];
1299 }
1300
1301 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1302                                        struct ieee80211_channel *channel,
1303                                        struct ieee80211_mgmt *mgmt,
1304                                        const u8 *country_ie, u8 country_ie_len,
1305                                        const u8 *pwr_constr_ie,
1306                                        const u8 *cisco_dtpc_ie)
1307 {
1308         bool has_80211h_pwr = false, has_cisco_pwr = false;
1309         int chan_pwr = 0, pwr_reduction_80211h = 0;
1310         int pwr_level_cisco, pwr_level_80211h;
1311         int new_ap_level;
1312         __le16 capab = mgmt->u.probe_resp.capab_info;
1313
1314         if (country_ie &&
1315             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1316              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1317                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1318                         sdata, channel, country_ie, country_ie_len,
1319                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1320                 pwr_level_80211h =
1321                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1322         }
1323
1324         if (cisco_dtpc_ie) {
1325                 ieee80211_find_cisco_dtpc(
1326                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1327                 has_cisco_pwr = true;
1328         }
1329
1330         if (!has_80211h_pwr && !has_cisco_pwr)
1331                 return 0;
1332
1333         /* If we have both 802.11h and Cisco DTPC, apply both limits
1334          * by picking the smallest of the two power levels advertised.
1335          */
1336         if (has_80211h_pwr &&
1337             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1338                 new_ap_level = pwr_level_80211h;
1339
1340                 if (sdata->ap_power_level == new_ap_level)
1341                         return 0;
1342
1343                 sdata_dbg(sdata,
1344                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1345                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1346                           sdata->u.mgd.bssid);
1347         } else {  /* has_cisco_pwr is always true here. */
1348                 new_ap_level = pwr_level_cisco;
1349
1350                 if (sdata->ap_power_level == new_ap_level)
1351                         return 0;
1352
1353                 sdata_dbg(sdata,
1354                           "Limiting TX power to %d dBm as advertised by %pM\n",
1355                           pwr_level_cisco, sdata->u.mgd.bssid);
1356         }
1357
1358         sdata->ap_power_level = new_ap_level;
1359         if (__ieee80211_recalc_txpower(sdata))
1360                 return BSS_CHANGED_TXPOWER;
1361         return 0;
1362 }
1363
1364 /* powersave */
1365 static void ieee80211_enable_ps(struct ieee80211_local *local,
1366                                 struct ieee80211_sub_if_data *sdata)
1367 {
1368         struct ieee80211_conf *conf = &local->hw.conf;
1369
1370         /*
1371          * If we are scanning right now then the parameters will
1372          * take effect when scan finishes.
1373          */
1374         if (local->scanning)
1375                 return;
1376
1377         if (conf->dynamic_ps_timeout > 0 &&
1378             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1379                 mod_timer(&local->dynamic_ps_timer, jiffies +
1380                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1381         } else {
1382                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1383                         ieee80211_send_nullfunc(local, sdata, true);
1384
1385                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1386                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1387                         return;
1388
1389                 conf->flags |= IEEE80211_CONF_PS;
1390                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1391         }
1392 }
1393
1394 static void ieee80211_change_ps(struct ieee80211_local *local)
1395 {
1396         struct ieee80211_conf *conf = &local->hw.conf;
1397
1398         if (local->ps_sdata) {
1399                 ieee80211_enable_ps(local, local->ps_sdata);
1400         } else if (conf->flags & IEEE80211_CONF_PS) {
1401                 conf->flags &= ~IEEE80211_CONF_PS;
1402                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1403                 del_timer_sync(&local->dynamic_ps_timer);
1404                 cancel_work_sync(&local->dynamic_ps_enable_work);
1405         }
1406 }
1407
1408 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1409 {
1410         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1411         struct sta_info *sta = NULL;
1412         bool authorized = false;
1413
1414         if (!mgd->powersave)
1415                 return false;
1416
1417         if (mgd->broken_ap)
1418                 return false;
1419
1420         if (!mgd->associated)
1421                 return false;
1422
1423         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1424                 return false;
1425
1426         if (!mgd->have_beacon)
1427                 return false;
1428
1429         rcu_read_lock();
1430         sta = sta_info_get(sdata, mgd->bssid);
1431         if (sta)
1432                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1433         rcu_read_unlock();
1434
1435         return authorized;
1436 }
1437
1438 /* need to hold RTNL or interface lock */
1439 void ieee80211_recalc_ps(struct ieee80211_local *local)
1440 {
1441         struct ieee80211_sub_if_data *sdata, *found = NULL;
1442         int count = 0;
1443         int timeout;
1444
1445         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1446                 local->ps_sdata = NULL;
1447                 return;
1448         }
1449
1450         list_for_each_entry(sdata, &local->interfaces, list) {
1451                 if (!ieee80211_sdata_running(sdata))
1452                         continue;
1453                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1454                         /* If an AP vif is found, then disable PS
1455                          * by setting the count to zero thereby setting
1456                          * ps_sdata to NULL.
1457                          */
1458                         count = 0;
1459                         break;
1460                 }
1461                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1462                         continue;
1463                 found = sdata;
1464                 count++;
1465         }
1466
1467         if (count == 1 && ieee80211_powersave_allowed(found)) {
1468                 u8 dtimper = found->u.mgd.dtim_period;
1469
1470                 timeout = local->dynamic_ps_forced_timeout;
1471                 if (timeout < 0)
1472                         timeout = 100;
1473                 local->hw.conf.dynamic_ps_timeout = timeout;
1474
1475                 /* If the TIM IE is invalid, pretend the value is 1 */
1476                 if (!dtimper)
1477                         dtimper = 1;
1478
1479                 local->hw.conf.ps_dtim_period = dtimper;
1480                 local->ps_sdata = found;
1481         } else {
1482                 local->ps_sdata = NULL;
1483         }
1484
1485         ieee80211_change_ps(local);
1486 }
1487
1488 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1489 {
1490         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1491
1492         if (sdata->vif.bss_conf.ps != ps_allowed) {
1493                 sdata->vif.bss_conf.ps = ps_allowed;
1494                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1495         }
1496 }
1497
1498 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1499 {
1500         struct ieee80211_local *local =
1501                 container_of(work, struct ieee80211_local,
1502                              dynamic_ps_disable_work);
1503
1504         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1505                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1506                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1507         }
1508
1509         ieee80211_wake_queues_by_reason(&local->hw,
1510                                         IEEE80211_MAX_QUEUE_MAP,
1511                                         IEEE80211_QUEUE_STOP_REASON_PS,
1512                                         false);
1513 }
1514
1515 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1516 {
1517         struct ieee80211_local *local =
1518                 container_of(work, struct ieee80211_local,
1519                              dynamic_ps_enable_work);
1520         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1521         struct ieee80211_if_managed *ifmgd;
1522         unsigned long flags;
1523         int q;
1524
1525         /* can only happen when PS was just disabled anyway */
1526         if (!sdata)
1527                 return;
1528
1529         ifmgd = &sdata->u.mgd;
1530
1531         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1532                 return;
1533
1534         if (local->hw.conf.dynamic_ps_timeout > 0) {
1535                 /* don't enter PS if TX frames are pending */
1536                 if (drv_tx_frames_pending(local)) {
1537                         mod_timer(&local->dynamic_ps_timer, jiffies +
1538                                   msecs_to_jiffies(
1539                                   local->hw.conf.dynamic_ps_timeout));
1540                         return;
1541                 }
1542
1543                 /*
1544                  * transmission can be stopped by others which leads to
1545                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1546                  * is not the actual idle state.
1547                  */
1548                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1549                 for (q = 0; q < local->hw.queues; q++) {
1550                         if (local->queue_stop_reasons[q]) {
1551                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1552                                                        flags);
1553                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1554                                           msecs_to_jiffies(
1555                                           local->hw.conf.dynamic_ps_timeout));
1556                                 return;
1557                         }
1558                 }
1559                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1560         }
1561
1562         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1563             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1564                 if (drv_tx_frames_pending(local)) {
1565                         mod_timer(&local->dynamic_ps_timer, jiffies +
1566                                   msecs_to_jiffies(
1567                                   local->hw.conf.dynamic_ps_timeout));
1568                 } else {
1569                         ieee80211_send_nullfunc(local, sdata, true);
1570                         /* Flush to get the tx status of nullfunc frame */
1571                         ieee80211_flush_queues(local, sdata, false);
1572                 }
1573         }
1574
1575         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1576               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1577             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1578                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1579                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1580                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1581         }
1582 }
1583
1584 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1585 {
1586         struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1587
1588         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1589 }
1590
1591 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1592 {
1593         struct delayed_work *delayed_work = to_delayed_work(work);
1594         struct ieee80211_sub_if_data *sdata =
1595                 container_of(delayed_work, struct ieee80211_sub_if_data,
1596                              dfs_cac_timer_work);
1597         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1598
1599         mutex_lock(&sdata->local->mtx);
1600         if (sdata->wdev.cac_started) {
1601                 ieee80211_vif_release_channel(sdata);
1602                 cfg80211_cac_event(sdata->dev, &chandef,
1603                                    NL80211_RADAR_CAC_FINISHED,
1604                                    GFP_KERNEL);
1605         }
1606         mutex_unlock(&sdata->local->mtx);
1607 }
1608
1609 static bool
1610 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1611 {
1612         struct ieee80211_local *local = sdata->local;
1613         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1614         bool ret = false;
1615         int ac;
1616
1617         if (local->hw.queues < IEEE80211_NUM_ACS)
1618                 return false;
1619
1620         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1621                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1622                 int non_acm_ac;
1623                 unsigned long now = jiffies;
1624
1625                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1626                     tx_tspec->admitted_time &&
1627                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1628                         tx_tspec->consumed_tx_time = 0;
1629                         tx_tspec->time_slice_start = now;
1630
1631                         if (tx_tspec->downgraded)
1632                                 tx_tspec->action =
1633                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1634                 }
1635
1636                 switch (tx_tspec->action) {
1637                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1638                         /* take the original parameters */
1639                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1640                                 sdata_err(sdata,
1641                                           "failed to set TX queue parameters for queue %d\n",
1642                                           ac);
1643                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1644                         tx_tspec->downgraded = false;
1645                         ret = true;
1646                         break;
1647                 case TX_TSPEC_ACTION_DOWNGRADE:
1648                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1649                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1650                                 ret = true;
1651                                 break;
1652                         }
1653                         /* downgrade next lower non-ACM AC */
1654                         for (non_acm_ac = ac + 1;
1655                              non_acm_ac < IEEE80211_NUM_ACS;
1656                              non_acm_ac++)
1657                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1658                                         break;
1659                         /* Usually the loop will result in using BK even if it
1660                          * requires admission control, but such a configuration
1661                          * makes no sense and we have to transmit somehow - the
1662                          * AC selection does the same thing.
1663                          * If we started out trying to downgrade from BK, then
1664                          * the extra condition here might be needed.
1665                          */
1666                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1667                                 non_acm_ac = IEEE80211_AC_BK;
1668                         if (drv_conf_tx(local, sdata, ac,
1669                                         &sdata->tx_conf[non_acm_ac]))
1670                                 sdata_err(sdata,
1671                                           "failed to set TX queue parameters for queue %d\n",
1672                                           ac);
1673                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1674                         ret = true;
1675                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1676                                 tx_tspec->time_slice_start + HZ - now + 1);
1677                         break;
1678                 case TX_TSPEC_ACTION_NONE:
1679                         /* nothing now */
1680                         break;
1681                 }
1682         }
1683
1684         return ret;
1685 }
1686
1687 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1688 {
1689         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1690                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1691 }
1692
1693 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1694 {
1695         struct ieee80211_sub_if_data *sdata;
1696
1697         sdata = container_of(work, struct ieee80211_sub_if_data,
1698                              u.mgd.tx_tspec_wk.work);
1699         ieee80211_sta_handle_tspec_ac_params(sdata);
1700 }
1701
1702 /* MLME */
1703 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1704                                      struct ieee80211_sub_if_data *sdata,
1705                                      const u8 *wmm_param, size_t wmm_param_len)
1706 {
1707         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1708         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1709         size_t left;
1710         int count, ac;
1711         const u8 *pos;
1712         u8 uapsd_queues = 0;
1713
1714         if (!local->ops->conf_tx)
1715                 return false;
1716
1717         if (local->hw.queues < IEEE80211_NUM_ACS)
1718                 return false;
1719
1720         if (!wmm_param)
1721                 return false;
1722
1723         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1724                 return false;
1725
1726         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1727                 uapsd_queues = ifmgd->uapsd_queues;
1728
1729         count = wmm_param[6] & 0x0f;
1730         if (count == ifmgd->wmm_last_param_set)
1731                 return false;
1732         ifmgd->wmm_last_param_set = count;
1733
1734         pos = wmm_param + 8;
1735         left = wmm_param_len - 8;
1736
1737         memset(&params, 0, sizeof(params));
1738
1739         sdata->wmm_acm = 0;
1740         for (; left >= 4; left -= 4, pos += 4) {
1741                 int aci = (pos[0] >> 5) & 0x03;
1742                 int acm = (pos[0] >> 4) & 0x01;
1743                 bool uapsd = false;
1744
1745                 switch (aci) {
1746                 case 1: /* AC_BK */
1747                         ac = IEEE80211_AC_BK;
1748                         if (acm)
1749                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1750                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1751                                 uapsd = true;
1752                         break;
1753                 case 2: /* AC_VI */
1754                         ac = IEEE80211_AC_VI;
1755                         if (acm)
1756                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1757                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1758                                 uapsd = true;
1759                         break;
1760                 case 3: /* AC_VO */
1761                         ac = IEEE80211_AC_VO;
1762                         if (acm)
1763                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1764                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1765                                 uapsd = true;
1766                         break;
1767                 case 0: /* AC_BE */
1768                 default:
1769                         ac = IEEE80211_AC_BE;
1770                         if (acm)
1771                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1772                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1773                                 uapsd = true;
1774                         break;
1775                 }
1776
1777                 params[ac].aifs = pos[0] & 0x0f;
1778
1779                 if (params[ac].aifs < 2) {
1780                         sdata_info(sdata,
1781                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1782                                    params[ac].aifs, aci);
1783                         params[ac].aifs = 2;
1784                 }
1785                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1786                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1787                 params[ac].txop = get_unaligned_le16(pos + 2);
1788                 params[ac].acm = acm;
1789                 params[ac].uapsd = uapsd;
1790
1791                 if (params[ac].cw_min == 0 ||
1792                     params[ac].cw_min > params[ac].cw_max) {
1793                         sdata_info(sdata,
1794                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1795                                    params[ac].cw_min, params[ac].cw_max, aci);
1796                         return false;
1797                 }
1798                 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
1799         }
1800
1801         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1802                 mlme_dbg(sdata,
1803                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1804                          ac, params[ac].acm,
1805                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1806                          params[ac].txop, params[ac].uapsd,
1807                          ifmgd->tx_tspec[ac].downgraded);
1808                 sdata->tx_conf[ac] = params[ac];
1809                 if (!ifmgd->tx_tspec[ac].downgraded &&
1810                     drv_conf_tx(local, sdata, ac, &params[ac]))
1811                         sdata_err(sdata,
1812                                   "failed to set TX queue parameters for AC %d\n",
1813                                   ac);
1814         }
1815
1816         /* enable WMM or activate new settings */
1817         sdata->vif.bss_conf.qos = true;
1818         return true;
1819 }
1820
1821 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1822 {
1823         lockdep_assert_held(&sdata->local->mtx);
1824
1825         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1826         ieee80211_run_deferred_scan(sdata->local);
1827 }
1828
1829 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1830 {
1831         mutex_lock(&sdata->local->mtx);
1832         __ieee80211_stop_poll(sdata);
1833         mutex_unlock(&sdata->local->mtx);
1834 }
1835
1836 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1837                                            u16 capab, bool erp_valid, u8 erp)
1838 {
1839         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1840         struct ieee80211_supported_band *sband;
1841         u32 changed = 0;
1842         bool use_protection;
1843         bool use_short_preamble;
1844         bool use_short_slot;
1845
1846         sband = ieee80211_get_sband(sdata);
1847         if (!sband)
1848                 return changed;
1849
1850         if (erp_valid) {
1851                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1852                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1853         } else {
1854                 use_protection = false;
1855                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1856         }
1857
1858         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1859         if (sband->band == NL80211_BAND_5GHZ)
1860                 use_short_slot = true;
1861
1862         if (use_protection != bss_conf->use_cts_prot) {
1863                 bss_conf->use_cts_prot = use_protection;
1864                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1865         }
1866
1867         if (use_short_preamble != bss_conf->use_short_preamble) {
1868                 bss_conf->use_short_preamble = use_short_preamble;
1869                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1870         }
1871
1872         if (use_short_slot != bss_conf->use_short_slot) {
1873                 bss_conf->use_short_slot = use_short_slot;
1874                 changed |= BSS_CHANGED_ERP_SLOT;
1875         }
1876
1877         return changed;
1878 }
1879
1880 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1881                                      struct cfg80211_bss *cbss,
1882                                      u32 bss_info_changed)
1883 {
1884         struct ieee80211_bss *bss = (void *)cbss->priv;
1885         struct ieee80211_local *local = sdata->local;
1886         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1887
1888         bss_info_changed |= BSS_CHANGED_ASSOC;
1889         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1890                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1891
1892         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1893                 beacon_loss_count * bss_conf->beacon_int));
1894
1895         sdata->u.mgd.associated = cbss;
1896         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1897
1898         ieee80211_check_rate_mask(sdata);
1899
1900         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1901
1902         if (sdata->vif.p2p ||
1903             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1904                 const struct cfg80211_bss_ies *ies;
1905
1906                 rcu_read_lock();
1907                 ies = rcu_dereference(cbss->ies);
1908                 if (ies) {
1909                         int ret;
1910
1911                         ret = cfg80211_get_p2p_attr(
1912                                         ies->data, ies->len,
1913                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1914                                         (u8 *) &bss_conf->p2p_noa_attr,
1915                                         sizeof(bss_conf->p2p_noa_attr));
1916                         if (ret >= 2) {
1917                                 sdata->u.mgd.p2p_noa_index =
1918                                         bss_conf->p2p_noa_attr.index;
1919                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1920                         }
1921                 }
1922                 rcu_read_unlock();
1923         }
1924
1925         /* just to be sure */
1926         ieee80211_stop_poll(sdata);
1927
1928         ieee80211_led_assoc(local, 1);
1929
1930         if (sdata->u.mgd.have_beacon) {
1931                 /*
1932                  * If the AP is buggy we may get here with no DTIM period
1933                  * known, so assume it's 1 which is the only safe assumption
1934                  * in that case, although if the TIM IE is broken powersave
1935                  * probably just won't work at all.
1936                  */
1937                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1938                 bss_conf->beacon_rate = bss->beacon_rate;
1939                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1940         } else {
1941                 bss_conf->beacon_rate = NULL;
1942                 bss_conf->dtim_period = 0;
1943         }
1944
1945         bss_conf->assoc = 1;
1946
1947         /* Tell the driver to monitor connection quality (if supported) */
1948         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1949             bss_conf->cqm_rssi_thold)
1950                 bss_info_changed |= BSS_CHANGED_CQM;
1951
1952         /* Enable ARP filtering */
1953         if (bss_conf->arp_addr_cnt)
1954                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1955
1956         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1957
1958         mutex_lock(&local->iflist_mtx);
1959         ieee80211_recalc_ps(local);
1960         mutex_unlock(&local->iflist_mtx);
1961
1962         ieee80211_recalc_smps(sdata);
1963         ieee80211_recalc_ps_vif(sdata);
1964
1965         netif_carrier_on(sdata->dev);
1966 }
1967
1968 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1969                                    u16 stype, u16 reason, bool tx,
1970                                    u8 *frame_buf)
1971 {
1972         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1973         struct ieee80211_local *local = sdata->local;
1974         u32 changed = 0;
1975
1976         sdata_assert_lock(sdata);
1977
1978         if (WARN_ON_ONCE(tx && !frame_buf))
1979                 return;
1980
1981         if (WARN_ON(!ifmgd->associated))
1982                 return;
1983
1984         ieee80211_stop_poll(sdata);
1985
1986         ifmgd->associated = NULL;
1987         netif_carrier_off(sdata->dev);
1988
1989         /*
1990          * if we want to get out of ps before disassoc (why?) we have
1991          * to do it before sending disassoc, as otherwise the null-packet
1992          * won't be valid.
1993          */
1994         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1995                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1996                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1997         }
1998         local->ps_sdata = NULL;
1999
2000         /* disable per-vif ps */
2001         ieee80211_recalc_ps_vif(sdata);
2002
2003         /* make sure ongoing transmission finishes */
2004         synchronize_net();
2005
2006         /*
2007          * drop any frame before deauth/disassoc, this can be data or
2008          * management frame. Since we are disconnecting, we should not
2009          * insist sending these frames which can take time and delay
2010          * the disconnection and possible the roaming.
2011          */
2012         if (tx)
2013                 ieee80211_flush_queues(local, sdata, true);
2014
2015         /* deauthenticate/disassociate now */
2016         if (tx || frame_buf) {
2017                 /*
2018                  * In multi channel scenarios guarantee that the virtual
2019                  * interface is granted immediate airtime to transmit the
2020                  * deauthentication frame by calling mgd_prepare_tx, if the
2021                  * driver requested so.
2022                  */
2023                 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2024                     !ifmgd->have_beacon)
2025                         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2026
2027                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2028                                                reason, tx, frame_buf);
2029         }
2030
2031         /* flush out frame - make sure the deauth was actually sent */
2032         if (tx)
2033                 ieee80211_flush_queues(local, sdata, false);
2034
2035         /* clear bssid only after building the needed mgmt frames */
2036         eth_zero_addr(ifmgd->bssid);
2037
2038         /* remove AP and TDLS peers */
2039         sta_info_flush(sdata);
2040
2041         /* finally reset all BSS / config parameters */
2042         changed |= ieee80211_reset_erp_info(sdata);
2043
2044         ieee80211_led_assoc(local, 0);
2045         changed |= BSS_CHANGED_ASSOC;
2046         sdata->vif.bss_conf.assoc = false;
2047
2048         ifmgd->p2p_noa_index = -1;
2049         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2050                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2051
2052         /* on the next assoc, re-program HT/VHT parameters */
2053         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2054         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2055         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2056         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2057
2058         /* reset MU-MIMO ownership and group data */
2059         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2060                sizeof(sdata->vif.bss_conf.mu_group.membership));
2061         memset(sdata->vif.bss_conf.mu_group.position, 0,
2062                sizeof(sdata->vif.bss_conf.mu_group.position));
2063         changed |= BSS_CHANGED_MU_GROUPS;
2064         sdata->vif.mu_mimo_owner = false;
2065
2066         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2067
2068         del_timer_sync(&local->dynamic_ps_timer);
2069         cancel_work_sync(&local->dynamic_ps_enable_work);
2070
2071         /* Disable ARP filtering */
2072         if (sdata->vif.bss_conf.arp_addr_cnt)
2073                 changed |= BSS_CHANGED_ARP_FILTER;
2074
2075         sdata->vif.bss_conf.qos = false;
2076         changed |= BSS_CHANGED_QOS;
2077
2078         /* The BSSID (not really interesting) and HT changed */
2079         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2080         ieee80211_bss_info_change_notify(sdata, changed);
2081
2082         /* disassociated - set to defaults now */
2083         ieee80211_set_wmm_default(sdata, false, false);
2084
2085         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2086         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2087         del_timer_sync(&sdata->u.mgd.timer);
2088         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2089
2090         sdata->vif.bss_conf.dtim_period = 0;
2091         sdata->vif.bss_conf.beacon_rate = NULL;
2092
2093         ifmgd->have_beacon = false;
2094
2095         ifmgd->flags = 0;
2096         mutex_lock(&local->mtx);
2097         ieee80211_vif_release_channel(sdata);
2098
2099         sdata->vif.csa_active = false;
2100         ifmgd->csa_waiting_bcn = false;
2101         ifmgd->csa_ignored_same_chan = false;
2102         if (sdata->csa_block_tx) {
2103                 ieee80211_wake_vif_queues(local, sdata,
2104                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2105                 sdata->csa_block_tx = false;
2106         }
2107         mutex_unlock(&local->mtx);
2108
2109         /* existing TX TSPEC sessions no longer exist */
2110         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2111         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2112
2113         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2114 }
2115
2116 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2117                              struct ieee80211_hdr *hdr)
2118 {
2119         /*
2120          * We can postpone the mgd.timer whenever receiving unicast frames
2121          * from AP because we know that the connection is working both ways
2122          * at that time. But multicast frames (and hence also beacons) must
2123          * be ignored here, because we need to trigger the timer during
2124          * data idle periods for sending the periodic probe request to the
2125          * AP we're connected to.
2126          */
2127         if (is_multicast_ether_addr(hdr->addr1))
2128                 return;
2129
2130         ieee80211_sta_reset_conn_monitor(sdata);
2131 }
2132
2133 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2134 {
2135         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2136         struct ieee80211_local *local = sdata->local;
2137
2138         mutex_lock(&local->mtx);
2139         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2140                 goto out;
2141
2142         __ieee80211_stop_poll(sdata);
2143
2144         mutex_lock(&local->iflist_mtx);
2145         ieee80211_recalc_ps(local);
2146         mutex_unlock(&local->iflist_mtx);
2147
2148         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2149                 goto out;
2150
2151         /*
2152          * We've received a probe response, but are not sure whether
2153          * we have or will be receiving any beacons or data, so let's
2154          * schedule the timers again, just in case.
2155          */
2156         ieee80211_sta_reset_beacon_monitor(sdata);
2157
2158         mod_timer(&ifmgd->conn_mon_timer,
2159                   round_jiffies_up(jiffies +
2160                                    IEEE80211_CONNECTION_IDLE_TIME));
2161 out:
2162         mutex_unlock(&local->mtx);
2163 }
2164
2165 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2166                                            struct ieee80211_hdr *hdr,
2167                                            u16 tx_time)
2168 {
2169         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2170         u16 tid = ieee80211_get_tid(hdr);
2171         int ac = ieee80211_ac_from_tid(tid);
2172         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2173         unsigned long now = jiffies;
2174
2175         if (likely(!tx_tspec->admitted_time))
2176                 return;
2177
2178         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2179                 tx_tspec->consumed_tx_time = 0;
2180                 tx_tspec->time_slice_start = now;
2181
2182                 if (tx_tspec->downgraded) {
2183                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2184                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2185                 }
2186         }
2187
2188         if (tx_tspec->downgraded)
2189                 return;
2190
2191         tx_tspec->consumed_tx_time += tx_time;
2192
2193         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2194                 tx_tspec->downgraded = true;
2195                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2196                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2197         }
2198 }
2199
2200 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2201                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2202 {
2203         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2204
2205         if (!ieee80211_is_data(hdr->frame_control))
2206             return;
2207
2208         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2209             sdata->u.mgd.probe_send_count > 0) {
2210                 if (ack)
2211                         ieee80211_sta_reset_conn_monitor(sdata);
2212                 else
2213                         sdata->u.mgd.nullfunc_failed = true;
2214                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2215                 return;
2216         }
2217
2218         if (ack)
2219                 ieee80211_sta_reset_conn_monitor(sdata);
2220 }
2221
2222 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2223 {
2224         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2225         const u8 *ssid;
2226         u8 *dst = ifmgd->associated->bssid;
2227         u8 unicast_limit = max(1, max_probe_tries - 3);
2228         struct sta_info *sta;
2229
2230         /*
2231          * Try sending broadcast probe requests for the last three
2232          * probe requests after the first ones failed since some
2233          * buggy APs only support broadcast probe requests.
2234          */
2235         if (ifmgd->probe_send_count >= unicast_limit)
2236                 dst = NULL;
2237
2238         /*
2239          * When the hardware reports an accurate Tx ACK status, it's
2240          * better to send a nullfunc frame instead of a probe request,
2241          * as it will kick us off the AP quickly if we aren't associated
2242          * anymore. The timeout will be reset if the frame is ACKed by
2243          * the AP.
2244          */
2245         ifmgd->probe_send_count++;
2246
2247         if (dst) {
2248                 mutex_lock(&sdata->local->sta_mtx);
2249                 sta = sta_info_get(sdata, dst);
2250                 if (!WARN_ON(!sta))
2251                         ieee80211_check_fast_rx(sta);
2252                 mutex_unlock(&sdata->local->sta_mtx);
2253         }
2254
2255         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2256                 ifmgd->nullfunc_failed = false;
2257                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2258         } else {
2259                 int ssid_len;
2260
2261                 rcu_read_lock();
2262                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2263                 if (WARN_ON_ONCE(ssid == NULL))
2264                         ssid_len = 0;
2265                 else
2266                         ssid_len = ssid[1];
2267
2268                 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2269                                          ssid + 2, ssid_len, NULL,
2270                                          0, (u32) -1, true, 0,
2271                                          ifmgd->associated->channel, false);
2272                 rcu_read_unlock();
2273         }
2274
2275         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2276         run_again(sdata, ifmgd->probe_timeout);
2277 }
2278
2279 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2280                                    bool beacon)
2281 {
2282         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2283         bool already = false;
2284
2285         if (!ieee80211_sdata_running(sdata))
2286                 return;
2287
2288         sdata_lock(sdata);
2289
2290         if (!ifmgd->associated)
2291                 goto out;
2292
2293         mutex_lock(&sdata->local->mtx);
2294
2295         if (sdata->local->tmp_channel || sdata->local->scanning) {
2296                 mutex_unlock(&sdata->local->mtx);
2297                 goto out;
2298         }
2299
2300         if (beacon) {
2301                 mlme_dbg_ratelimited(sdata,
2302                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2303                                      beacon_loss_count);
2304
2305                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2306         }
2307
2308         /*
2309          * The driver/our work has already reported this event or the
2310          * connection monitoring has kicked in and we have already sent
2311          * a probe request. Or maybe the AP died and the driver keeps
2312          * reporting until we disassociate...
2313          *
2314          * In either case we have to ignore the current call to this
2315          * function (except for setting the correct probe reason bit)
2316          * because otherwise we would reset the timer every time and
2317          * never check whether we received a probe response!
2318          */
2319         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2320                 already = true;
2321
2322         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2323
2324         mutex_unlock(&sdata->local->mtx);
2325
2326         if (already)
2327                 goto out;
2328
2329         mutex_lock(&sdata->local->iflist_mtx);
2330         ieee80211_recalc_ps(sdata->local);
2331         mutex_unlock(&sdata->local->iflist_mtx);
2332
2333         ifmgd->probe_send_count = 0;
2334         ieee80211_mgd_probe_ap_send(sdata);
2335  out:
2336         sdata_unlock(sdata);
2337 }
2338
2339 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2340                                           struct ieee80211_vif *vif)
2341 {
2342         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2343         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2344         struct cfg80211_bss *cbss;
2345         struct sk_buff *skb;
2346         const u8 *ssid;
2347         int ssid_len;
2348
2349         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2350                 return NULL;
2351
2352         sdata_assert_lock(sdata);
2353
2354         if (ifmgd->associated)
2355                 cbss = ifmgd->associated;
2356         else if (ifmgd->auth_data)
2357                 cbss = ifmgd->auth_data->bss;
2358         else if (ifmgd->assoc_data)
2359                 cbss = ifmgd->assoc_data->bss;
2360         else
2361                 return NULL;
2362
2363         rcu_read_lock();
2364         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2365         if (WARN_ON_ONCE(ssid == NULL))
2366                 ssid_len = 0;
2367         else
2368                 ssid_len = ssid[1];
2369
2370         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2371                                         (u32) -1, cbss->channel,
2372                                         ssid + 2, ssid_len,
2373                                         NULL, 0, true);
2374         rcu_read_unlock();
2375
2376         return skb;
2377 }
2378 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2379
2380 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2381                                         const u8 *buf, size_t len, bool tx,
2382                                         u16 reason)
2383 {
2384         struct ieee80211_event event = {
2385                 .type = MLME_EVENT,
2386                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2387                 .u.mlme.reason = reason,
2388         };
2389
2390         if (tx)
2391                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2392         else
2393                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2394
2395         drv_event_callback(sdata->local, sdata, &event);
2396 }
2397
2398 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2399 {
2400         struct ieee80211_local *local = sdata->local;
2401         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2402         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2403
2404         sdata_lock(sdata);
2405         if (!ifmgd->associated) {
2406                 sdata_unlock(sdata);
2407                 return;
2408         }
2409
2410         /* AP is probably out of range (or not reachable for another reason) so
2411          * remove the bss struct for that AP.
2412          */
2413         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2414
2415         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2416                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2417                                true, frame_buf);
2418         mutex_lock(&local->mtx);
2419         sdata->vif.csa_active = false;
2420         ifmgd->csa_waiting_bcn = false;
2421         if (sdata->csa_block_tx) {
2422                 ieee80211_wake_vif_queues(local, sdata,
2423                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2424                 sdata->csa_block_tx = false;
2425         }
2426         mutex_unlock(&local->mtx);
2427
2428         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2429                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2430
2431         sdata_unlock(sdata);
2432 }
2433
2434 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2435 {
2436         struct ieee80211_sub_if_data *sdata =
2437                 container_of(work, struct ieee80211_sub_if_data,
2438                              u.mgd.beacon_connection_loss_work);
2439         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2440
2441         if (ifmgd->associated)
2442                 ifmgd->beacon_loss_count++;
2443
2444         if (ifmgd->connection_loss) {
2445                 sdata_info(sdata, "Connection to AP %pM lost\n",
2446                            ifmgd->bssid);
2447                 __ieee80211_disconnect(sdata);
2448         } else {
2449                 ieee80211_mgd_probe_ap(sdata, true);
2450         }
2451 }
2452
2453 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2454 {
2455         struct ieee80211_sub_if_data *sdata =
2456                 container_of(work, struct ieee80211_sub_if_data,
2457                              u.mgd.csa_connection_drop_work);
2458
2459         __ieee80211_disconnect(sdata);
2460 }
2461
2462 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2463 {
2464         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2465         struct ieee80211_hw *hw = &sdata->local->hw;
2466
2467         trace_api_beacon_loss(sdata);
2468
2469         sdata->u.mgd.connection_loss = false;
2470         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2471 }
2472 EXPORT_SYMBOL(ieee80211_beacon_loss);
2473
2474 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2475 {
2476         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2477         struct ieee80211_hw *hw = &sdata->local->hw;
2478
2479         trace_api_connection_loss(sdata);
2480
2481         sdata->u.mgd.connection_loss = true;
2482         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2483 }
2484 EXPORT_SYMBOL(ieee80211_connection_loss);
2485
2486
2487 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2488                                         bool assoc)
2489 {
2490         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2491
2492         sdata_assert_lock(sdata);
2493
2494         if (!assoc) {
2495                 /*
2496                  * we are not authenticated yet, the only timer that could be
2497                  * running is the timeout for the authentication response which
2498                  * which is not relevant anymore.
2499                  */
2500                 del_timer_sync(&sdata->u.mgd.timer);
2501                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2502
2503                 eth_zero_addr(sdata->u.mgd.bssid);
2504                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2505                 sdata->u.mgd.flags = 0;
2506                 mutex_lock(&sdata->local->mtx);
2507                 ieee80211_vif_release_channel(sdata);
2508                 mutex_unlock(&sdata->local->mtx);
2509         }
2510
2511         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2512         kfree(auth_data);
2513         sdata->u.mgd.auth_data = NULL;
2514 }
2515
2516 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2517                                          bool assoc, bool abandon)
2518 {
2519         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2520
2521         sdata_assert_lock(sdata);
2522
2523         if (!assoc) {
2524                 /*
2525                  * we are not associated yet, the only timer that could be
2526                  * running is the timeout for the association response which
2527                  * which is not relevant anymore.
2528                  */
2529                 del_timer_sync(&sdata->u.mgd.timer);
2530                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2531
2532                 eth_zero_addr(sdata->u.mgd.bssid);
2533                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2534                 sdata->u.mgd.flags = 0;
2535                 sdata->vif.mu_mimo_owner = false;
2536
2537                 mutex_lock(&sdata->local->mtx);
2538                 ieee80211_vif_release_channel(sdata);
2539                 mutex_unlock(&sdata->local->mtx);
2540
2541                 if (abandon)
2542                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2543         }
2544
2545         kfree(assoc_data);
2546         sdata->u.mgd.assoc_data = NULL;
2547 }
2548
2549 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2550                                      struct ieee80211_mgmt *mgmt, size_t len)
2551 {
2552         struct ieee80211_local *local = sdata->local;
2553         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2554         u8 *pos;
2555         struct ieee802_11_elems elems;
2556         u32 tx_flags = 0;
2557
2558         pos = mgmt->u.auth.variable;
2559         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2560         if (!elems.challenge)
2561                 return;
2562         auth_data->expected_transaction = 4;
2563         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2564         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2565                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2566                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2567         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2568                             elems.challenge - 2, elems.challenge_len + 2,
2569                             auth_data->bss->bssid, auth_data->bss->bssid,
2570                             auth_data->key, auth_data->key_len,
2571                             auth_data->key_idx, tx_flags);
2572 }
2573
2574 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2575                                    struct ieee80211_mgmt *mgmt, size_t len)
2576 {
2577         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2578         u8 bssid[ETH_ALEN];
2579         u16 auth_alg, auth_transaction, status_code;
2580         struct sta_info *sta;
2581         struct ieee80211_event event = {
2582                 .type = MLME_EVENT,
2583                 .u.mlme.data = AUTH_EVENT,
2584         };
2585
2586         sdata_assert_lock(sdata);
2587
2588         if (len < 24 + 6)
2589                 return;
2590
2591         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2592                 return;
2593
2594         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2595
2596         if (!ether_addr_equal(bssid, mgmt->bssid))
2597                 return;
2598
2599         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2600         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2601         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2602
2603         if (auth_alg != ifmgd->auth_data->algorithm ||
2604             auth_transaction != ifmgd->auth_data->expected_transaction) {
2605                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2606                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2607                            auth_transaction,
2608                            ifmgd->auth_data->expected_transaction);
2609                 return;
2610         }
2611
2612         if (status_code != WLAN_STATUS_SUCCESS) {
2613                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2614                            mgmt->sa, status_code);
2615                 ieee80211_destroy_auth_data(sdata, false);
2616                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2617                 event.u.mlme.status = MLME_DENIED;
2618                 event.u.mlme.reason = status_code;
2619                 drv_event_callback(sdata->local, sdata, &event);
2620                 return;
2621         }
2622
2623         switch (ifmgd->auth_data->algorithm) {
2624         case WLAN_AUTH_OPEN:
2625         case WLAN_AUTH_LEAP:
2626         case WLAN_AUTH_FT:
2627         case WLAN_AUTH_SAE:
2628         case WLAN_AUTH_FILS_SK:
2629         case WLAN_AUTH_FILS_SK_PFS:
2630         case WLAN_AUTH_FILS_PK:
2631                 break;
2632         case WLAN_AUTH_SHARED_KEY:
2633                 if (ifmgd->auth_data->expected_transaction != 4) {
2634                         ieee80211_auth_challenge(sdata, mgmt, len);
2635                         /* need another frame */
2636                         return;
2637                 }
2638                 break;
2639         default:
2640                 WARN_ONCE(1, "invalid auth alg %d",
2641                           ifmgd->auth_data->algorithm);
2642                 return;
2643         }
2644
2645         event.u.mlme.status = MLME_SUCCESS;
2646         drv_event_callback(sdata->local, sdata, &event);
2647         sdata_info(sdata, "authenticated\n");
2648         ifmgd->auth_data->done = true;
2649         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2650         ifmgd->auth_data->timeout_started = true;
2651         run_again(sdata, ifmgd->auth_data->timeout);
2652
2653         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2654             ifmgd->auth_data->expected_transaction != 2) {
2655                 /*
2656                  * Report auth frame to user space for processing since another
2657                  * round of Authentication frames is still needed.
2658                  */
2659                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2660                 return;
2661         }
2662
2663         /* move station state to auth */
2664         mutex_lock(&sdata->local->sta_mtx);
2665         sta = sta_info_get(sdata, bssid);
2666         if (!sta) {
2667                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2668                 goto out_err;
2669         }
2670         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2671                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2672                 goto out_err;
2673         }
2674         mutex_unlock(&sdata->local->sta_mtx);
2675
2676         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2677         return;
2678  out_err:
2679         mutex_unlock(&sdata->local->sta_mtx);
2680         /* ignore frame -- wait for timeout */
2681 }
2682
2683 #define case_WLAN(type) \
2684         case WLAN_REASON_##type: return #type
2685
2686 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2687 {
2688         switch (reason_code) {
2689         case_WLAN(UNSPECIFIED);
2690         case_WLAN(PREV_AUTH_NOT_VALID);
2691         case_WLAN(DEAUTH_LEAVING);
2692         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2693         case_WLAN(DISASSOC_AP_BUSY);
2694         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2695         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2696         case_WLAN(DISASSOC_STA_HAS_LEFT);
2697         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2698         case_WLAN(DISASSOC_BAD_POWER);
2699         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2700         case_WLAN(INVALID_IE);
2701         case_WLAN(MIC_FAILURE);
2702         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2703         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2704         case_WLAN(IE_DIFFERENT);
2705         case_WLAN(INVALID_GROUP_CIPHER);
2706         case_WLAN(INVALID_PAIRWISE_CIPHER);
2707         case_WLAN(INVALID_AKMP);
2708         case_WLAN(UNSUPP_RSN_VERSION);
2709         case_WLAN(INVALID_RSN_IE_CAP);
2710         case_WLAN(IEEE8021X_FAILED);
2711         case_WLAN(CIPHER_SUITE_REJECTED);
2712         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2713         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2714         case_WLAN(DISASSOC_LOW_ACK);
2715         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2716         case_WLAN(QSTA_LEAVE_QBSS);
2717         case_WLAN(QSTA_NOT_USE);
2718         case_WLAN(QSTA_REQUIRE_SETUP);
2719         case_WLAN(QSTA_TIMEOUT);
2720         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2721         case_WLAN(MESH_PEER_CANCELED);
2722         case_WLAN(MESH_MAX_PEERS);
2723         case_WLAN(MESH_CONFIG);
2724         case_WLAN(MESH_CLOSE);
2725         case_WLAN(MESH_MAX_RETRIES);
2726         case_WLAN(MESH_CONFIRM_TIMEOUT);
2727         case_WLAN(MESH_INVALID_GTK);
2728         case_WLAN(MESH_INCONSISTENT_PARAM);
2729         case_WLAN(MESH_INVALID_SECURITY);
2730         case_WLAN(MESH_PATH_ERROR);
2731         case_WLAN(MESH_PATH_NOFORWARD);
2732         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2733         case_WLAN(MAC_EXISTS_IN_MBSS);
2734         case_WLAN(MESH_CHAN_REGULATORY);
2735         case_WLAN(MESH_CHAN);
2736         default: return "<unknown>";
2737         }
2738 }
2739
2740 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2741                                      struct ieee80211_mgmt *mgmt, size_t len)
2742 {
2743         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2744         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2745
2746         sdata_assert_lock(sdata);
2747
2748         if (len < 24 + 2)
2749                 return;
2750
2751         if (ifmgd->associated &&
2752             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2753                 const u8 *bssid = ifmgd->associated->bssid;
2754
2755                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2756                            bssid, reason_code,
2757                            ieee80211_get_reason_code_string(reason_code));
2758
2759                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2760
2761                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2762                                             reason_code);
2763                 return;
2764         }
2765
2766         if (ifmgd->assoc_data &&
2767             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2768                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2769
2770                 sdata_info(sdata,
2771                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2772                            bssid, reason_code,
2773                            ieee80211_get_reason_code_string(reason_code));
2774
2775                 ieee80211_destroy_assoc_data(sdata, false, true);
2776
2777                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2778                 return;
2779         }
2780 }
2781
2782
2783 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2784                                        struct ieee80211_mgmt *mgmt, size_t len)
2785 {
2786         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2787         u16 reason_code;
2788
2789         sdata_assert_lock(sdata);
2790
2791         if (len < 24 + 2)
2792                 return;
2793
2794         if (!ifmgd->associated ||
2795             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2796                 return;
2797
2798         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2799
2800         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2801                    mgmt->sa, reason_code,
2802                    ieee80211_get_reason_code_string(reason_code));
2803
2804         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2805
2806         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2807 }
2808
2809 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2810                                 u8 *supp_rates, unsigned int supp_rates_len,
2811                                 u32 *rates, u32 *basic_rates,
2812                                 bool *have_higher_than_11mbit,
2813                                 int *min_rate, int *min_rate_index,
2814                                 int shift)
2815 {
2816         int i, j;
2817
2818         for (i = 0; i < supp_rates_len; i++) {
2819                 int rate = supp_rates[i] & 0x7f;
2820                 bool is_basic = !!(supp_rates[i] & 0x80);
2821
2822                 if ((rate * 5 * (1 << shift)) > 110)
2823                         *have_higher_than_11mbit = true;
2824
2825                 /*
2826                  * Skip HT and VHT BSS membership selectors since they're not
2827                  * rates.
2828                  *
2829                  * Note: Even though the membership selector and the basic
2830                  *       rate flag share the same bit, they are not exactly
2831                  *       the same.
2832                  */
2833                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
2834                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
2835                         continue;
2836
2837                 for (j = 0; j < sband->n_bitrates; j++) {
2838                         struct ieee80211_rate *br;
2839                         int brate;
2840
2841                         br = &sband->bitrates[j];
2842
2843                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2844                         if (brate == rate) {
2845                                 *rates |= BIT(j);
2846                                 if (is_basic)
2847                                         *basic_rates |= BIT(j);
2848                                 if ((rate * 5) < *min_rate) {
2849                                         *min_rate = rate * 5;
2850                                         *min_rate_index = j;
2851                                 }
2852                                 break;
2853                         }
2854                 }
2855         }
2856 }
2857
2858 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2859                                     struct cfg80211_bss *cbss,
2860                                     struct ieee80211_mgmt *mgmt, size_t len)
2861 {
2862         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2863         struct ieee80211_local *local = sdata->local;
2864         struct ieee80211_supported_band *sband;
2865         struct sta_info *sta;
2866         u8 *pos;
2867         u16 capab_info, aid;
2868         struct ieee802_11_elems elems;
2869         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2870         const struct cfg80211_bss_ies *bss_ies = NULL;
2871         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2872         u32 changed = 0;
2873         int err;
2874         bool ret;
2875
2876         /* AssocResp and ReassocResp have identical structure */
2877
2878         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2879         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2880
2881         /*
2882          * The 5 MSB of the AID field are reserved
2883          * (802.11-2016 9.4.1.8 AID field)
2884          */
2885         aid &= 0x7ff;
2886
2887         ifmgd->broken_ap = false;
2888
2889         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2890                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2891                            aid);
2892                 aid = 0;
2893                 ifmgd->broken_ap = true;
2894         }
2895
2896         pos = mgmt->u.assoc_resp.variable;
2897         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2898
2899         if (!elems.supp_rates) {
2900                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2901                 return false;
2902         }
2903
2904         ifmgd->aid = aid;
2905         ifmgd->tdls_chan_switch_prohibited =
2906                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2907                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2908
2909         /*
2910          * Some APs are erroneously not including some information in their
2911          * (re)association response frames. Try to recover by using the data
2912          * from the beacon or probe response. This seems to afflict mobile
2913          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2914          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2915          */
2916         if ((assoc_data->wmm && !elems.wmm_param) ||
2917             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2918              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2919             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2920              (!elems.vht_cap_elem || !elems.vht_operation))) {
2921                 const struct cfg80211_bss_ies *ies;
2922                 struct ieee802_11_elems bss_elems;
2923
2924                 rcu_read_lock();
2925                 ies = rcu_dereference(cbss->ies);
2926                 if (ies)
2927                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2928                                           GFP_ATOMIC);
2929                 rcu_read_unlock();
2930                 if (!bss_ies)
2931                         return false;
2932
2933                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2934                                        false, &bss_elems);
2935                 if (assoc_data->wmm &&
2936                     !elems.wmm_param && bss_elems.wmm_param) {
2937                         elems.wmm_param = bss_elems.wmm_param;
2938                         sdata_info(sdata,
2939                                    "AP bug: WMM param missing from AssocResp\n");
2940                 }
2941
2942                 /*
2943                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2944                  * have to include the IEs in the (re)association response.
2945                  */
2946                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2947                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2948                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2949                         sdata_info(sdata,
2950                                    "AP bug: HT capability missing from AssocResp\n");
2951                 }
2952                 if (!elems.ht_operation && bss_elems.ht_operation &&
2953                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2954                         elems.ht_operation = bss_elems.ht_operation;
2955                         sdata_info(sdata,
2956                                    "AP bug: HT operation missing from AssocResp\n");
2957                 }
2958                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2959                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2960                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2961                         sdata_info(sdata,
2962                                    "AP bug: VHT capa missing from AssocResp\n");
2963                 }
2964                 if (!elems.vht_operation && bss_elems.vht_operation &&
2965                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2966                         elems.vht_operation = bss_elems.vht_operation;
2967                         sdata_info(sdata,
2968                                    "AP bug: VHT operation missing from AssocResp\n");
2969                 }
2970         }
2971
2972         /*
2973          * We previously checked these in the beacon/probe response, so
2974          * they should be present here. This is just a safety net.
2975          */
2976         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2977             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2978                 sdata_info(sdata,
2979                            "HT AP is missing WMM params or HT capability/operation\n");
2980                 ret = false;
2981                 goto out;
2982         }
2983
2984         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2985             (!elems.vht_cap_elem || !elems.vht_operation)) {
2986                 sdata_info(sdata,
2987                            "VHT AP is missing VHT capability/operation\n");
2988                 ret = false;
2989                 goto out;
2990         }
2991
2992         mutex_lock(&sdata->local->sta_mtx);
2993         /*
2994          * station info was already allocated and inserted before
2995          * the association and should be available to us
2996          */
2997         sta = sta_info_get(sdata, cbss->bssid);
2998         if (WARN_ON(!sta)) {
2999                 mutex_unlock(&sdata->local->sta_mtx);
3000                 ret = false;
3001                 goto out;
3002         }
3003
3004         sband = ieee80211_get_sband(sdata);
3005         if (!sband) {
3006                 mutex_unlock(&sdata->local->sta_mtx);
3007                 ret = false;
3008                 goto out;
3009         }
3010
3011         /* Set up internal HT/VHT capabilities */
3012         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3013                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3014                                                   elems.ht_cap_elem, sta);
3015
3016         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3017                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3018                                                     elems.vht_cap_elem, sta);
3019
3020         /*
3021          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3022          * in their association response, so ignore that data for our own
3023          * configuration. If it changed since the last beacon, we'll get the
3024          * next beacon and update then.
3025          */
3026
3027         /*
3028          * If an operating mode notification IE is present, override the
3029          * NSS calculation (that would be done in rate_control_rate_init())
3030          * and use the # of streams from that element.
3031          */
3032         if (elems.opmode_notif &&
3033             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3034                 u8 nss;
3035
3036                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3037                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3038                 nss += 1;
3039                 sta->sta.rx_nss = nss;
3040         }
3041
3042         rate_control_rate_init(sta);
3043
3044         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3045                 set_sta_flag(sta, WLAN_STA_MFP);
3046                 sta->sta.mfp = true;
3047         } else {
3048                 sta->sta.mfp = false;
3049         }
3050
3051         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3052
3053         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3054         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3055                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3056         if (err) {
3057                 sdata_info(sdata,
3058                            "failed to move station %pM to desired state\n",
3059                            sta->sta.addr);
3060                 WARN_ON(__sta_info_destroy(sta));
3061                 mutex_unlock(&sdata->local->sta_mtx);
3062                 ret = false;
3063                 goto out;
3064         }
3065
3066         mutex_unlock(&sdata->local->sta_mtx);
3067
3068         /*
3069          * Always handle WMM once after association regardless
3070          * of the first value the AP uses. Setting -1 here has
3071          * that effect because the AP values is an unsigned
3072          * 4-bit value.
3073          */
3074         ifmgd->wmm_last_param_set = -1;
3075
3076         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3077                 ieee80211_set_wmm_default(sdata, false, false);
3078         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3079                                              elems.wmm_param_len)) {
3080                 /* still enable QoS since we might have HT/VHT */
3081                 ieee80211_set_wmm_default(sdata, false, true);
3082                 /* set the disable-WMM flag in this case to disable
3083                  * tracking WMM parameter changes in the beacon if
3084                  * the parameters weren't actually valid. Doing so
3085                  * avoids changing parameters very strangely when
3086                  * the AP is going back and forth between valid and
3087                  * invalid parameters.
3088                  */
3089                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3090         }
3091         changed |= BSS_CHANGED_QOS;
3092
3093         if (elems.max_idle_period_ie) {
3094                 bss_conf->max_idle_period =
3095                         le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3096                 bss_conf->protected_keep_alive =
3097                         !!(elems.max_idle_period_ie->idle_options &
3098                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3099                 changed |= BSS_CHANGED_KEEP_ALIVE;
3100         } else {
3101                 bss_conf->max_idle_period = 0;
3102                 bss_conf->protected_keep_alive = false;
3103         }
3104
3105         /* set AID and assoc capability,
3106          * ieee80211_set_associated() will tell the driver */
3107         bss_conf->aid = aid;
3108         bss_conf->assoc_capability = capab_info;
3109         ieee80211_set_associated(sdata, cbss, changed);
3110
3111         /*
3112          * If we're using 4-addr mode, let the AP know that we're
3113          * doing so, so that it can create the STA VLAN on its side
3114          */
3115         if (ifmgd->use_4addr)
3116                 ieee80211_send_4addr_nullfunc(local, sdata);
3117
3118         /*
3119          * Start timer to probe the connection to the AP now.
3120          * Also start the timer that will detect beacon loss.
3121          */
3122         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3123         ieee80211_sta_reset_beacon_monitor(sdata);
3124
3125         ret = true;
3126  out:
3127         kfree(bss_ies);
3128         return ret;
3129 }
3130
3131 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3132                                          struct ieee80211_mgmt *mgmt,
3133                                          size_t len)
3134 {
3135         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3136         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3137         u16 capab_info, status_code, aid;
3138         struct ieee802_11_elems elems;
3139         int ac, uapsd_queues = -1;
3140         u8 *pos;
3141         bool reassoc;
3142         struct cfg80211_bss *bss;
3143         struct ieee80211_event event = {
3144                 .type = MLME_EVENT,
3145                 .u.mlme.data = ASSOC_EVENT,
3146         };
3147
3148         sdata_assert_lock(sdata);
3149
3150         if (!assoc_data)
3151                 return;
3152         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3153                 return;
3154
3155         /*
3156          * AssocResp and ReassocResp have identical structure, so process both
3157          * of them in this function.
3158          */
3159
3160         if (len < 24 + 6)
3161                 return;
3162
3163         reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3164         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3165         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3166         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3167
3168         sdata_info(sdata,
3169                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3170                    reassoc ? "Rea" : "A", mgmt->sa,
3171                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3172
3173         if (assoc_data->fils_kek_len &&
3174             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3175                 return;
3176
3177         pos = mgmt->u.assoc_resp.variable;
3178         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3179
3180         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3181             elems.timeout_int &&
3182             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3183                 u32 tu, ms;
3184                 tu = le32_to_cpu(elems.timeout_int->value);
3185                 ms = tu * 1024 / 1000;
3186                 sdata_info(sdata,
3187                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3188                            mgmt->sa, tu, ms);
3189                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3190                 assoc_data->timeout_started = true;
3191                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3192                         run_again(sdata, assoc_data->timeout);
3193                 return;
3194         }
3195
3196         bss = assoc_data->bss;
3197
3198         if (status_code != WLAN_STATUS_SUCCESS) {
3199                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3200                            mgmt->sa, status_code);
3201                 ieee80211_destroy_assoc_data(sdata, false, false);
3202                 event.u.mlme.status = MLME_DENIED;
3203                 event.u.mlme.reason = status_code;
3204                 drv_event_callback(sdata->local, sdata, &event);
3205         } else {
3206                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3207                         /* oops -- internal error -- send timeout for now */
3208                         ieee80211_destroy_assoc_data(sdata, false, false);
3209                         cfg80211_assoc_timeout(sdata->dev, bss);
3210                         return;
3211                 }
3212                 event.u.mlme.status = MLME_SUCCESS;
3213                 drv_event_callback(sdata->local, sdata, &event);
3214                 sdata_info(sdata, "associated\n");
3215
3216                 /*
3217                  * destroy assoc_data afterwards, as otherwise an idle
3218                  * recalc after assoc_data is NULL but before associated
3219                  * is set can cause the interface to go idle
3220                  */
3221                 ieee80211_destroy_assoc_data(sdata, true, false);
3222
3223                 /* get uapsd queues configuration */
3224                 uapsd_queues = 0;
3225                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3226                         if (sdata->tx_conf[ac].uapsd)
3227                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3228         }
3229
3230         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3231 }
3232
3233 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3234                                   struct ieee80211_mgmt *mgmt, size_t len,
3235                                   struct ieee80211_rx_status *rx_status,
3236                                   struct ieee802_11_elems *elems)
3237 {
3238         struct ieee80211_local *local = sdata->local;
3239         struct ieee80211_bss *bss;
3240         struct ieee80211_channel *channel;
3241
3242         sdata_assert_lock(sdata);
3243
3244         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3245         if (!channel)
3246                 return;
3247
3248         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3249                                         channel);
3250         if (bss) {
3251                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3252                 ieee80211_rx_bss_put(local, bss);
3253         }
3254 }
3255
3256
3257 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3258                                          struct sk_buff *skb)
3259 {
3260         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3261         struct ieee80211_if_managed *ifmgd;
3262         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3263         size_t baselen, len = skb->len;
3264         struct ieee802_11_elems elems;
3265
3266         ifmgd = &sdata->u.mgd;
3267
3268         sdata_assert_lock(sdata);
3269
3270         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3271                 return; /* ignore ProbeResp to foreign address */
3272
3273         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3274         if (baselen > len)
3275                 return;
3276
3277         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3278                                false, &elems);
3279
3280         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3281
3282         if (ifmgd->associated &&
3283             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3284                 ieee80211_reset_ap_probe(sdata);
3285 }
3286
3287 /*
3288  * This is the canonical list of information elements we care about,
3289  * the filter code also gives us all changes to the Microsoft OUI
3290  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3291  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3292  * changes to requested client power.
3293  *
3294  * We implement beacon filtering in software since that means we can
3295  * avoid processing the frame here and in cfg80211, and userspace
3296  * will not be able to tell whether the hardware supports it or not.
3297  *
3298  * XXX: This list needs to be dynamic -- userspace needs to be able to
3299  *      add items it requires. It also needs to be able to tell us to
3300  *      look out for other vendor IEs.
3301  */
3302 static const u64 care_about_ies =
3303         (1ULL << WLAN_EID_COUNTRY) |
3304         (1ULL << WLAN_EID_ERP_INFO) |
3305         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3306         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3307         (1ULL << WLAN_EID_HT_CAPABILITY) |
3308         (1ULL << WLAN_EID_HT_OPERATION) |
3309         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3310
3311 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3312                                         struct ieee80211_if_managed *ifmgd,
3313                                         struct ieee80211_bss_conf *bss_conf,
3314                                         struct ieee80211_local *local,
3315                                         struct ieee80211_rx_status *rx_status)
3316 {
3317         /* Track average RSSI from the Beacon frames of the current AP */
3318
3319         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3320                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3321                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3322                 ifmgd->last_cqm_event_signal = 0;
3323                 ifmgd->count_beacon_signal = 1;
3324                 ifmgd->last_ave_beacon_signal = 0;
3325         } else {
3326                 ifmgd->count_beacon_signal++;
3327         }
3328
3329         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3330
3331         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3332             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3333                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3334                 int last_sig = ifmgd->last_ave_beacon_signal;
3335                 struct ieee80211_event event = {
3336                         .type = RSSI_EVENT,
3337                 };
3338
3339                 /*
3340                  * if signal crosses either of the boundaries, invoke callback
3341                  * with appropriate parameters
3342                  */
3343                 if (sig > ifmgd->rssi_max_thold &&
3344                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3345                         ifmgd->last_ave_beacon_signal = sig;
3346                         event.u.rssi.data = RSSI_EVENT_HIGH;
3347                         drv_event_callback(local, sdata, &event);
3348                 } else if (sig < ifmgd->rssi_min_thold &&
3349                            (last_sig >= ifmgd->rssi_max_thold ||
3350                            last_sig == 0)) {
3351                         ifmgd->last_ave_beacon_signal = sig;
3352                         event.u.rssi.data = RSSI_EVENT_LOW;
3353                         drv_event_callback(local, sdata, &event);
3354                 }
3355         }
3356
3357         if (bss_conf->cqm_rssi_thold &&
3358             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3359             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3360                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3361                 int last_event = ifmgd->last_cqm_event_signal;
3362                 int thold = bss_conf->cqm_rssi_thold;
3363                 int hyst = bss_conf->cqm_rssi_hyst;
3364
3365                 if (sig < thold &&
3366                     (last_event == 0 || sig < last_event - hyst)) {
3367                         ifmgd->last_cqm_event_signal = sig;
3368                         ieee80211_cqm_rssi_notify(
3369                                 &sdata->vif,
3370                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3371                                 sig, GFP_KERNEL);
3372                 } else if (sig > thold &&
3373                            (last_event == 0 || sig > last_event + hyst)) {
3374                         ifmgd->last_cqm_event_signal = sig;
3375                         ieee80211_cqm_rssi_notify(
3376                                 &sdata->vif,
3377                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3378                                 sig, GFP_KERNEL);
3379                 }
3380         }
3381
3382         if (bss_conf->cqm_rssi_low &&
3383             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3384                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3385                 int last_event = ifmgd->last_cqm_event_signal;
3386                 int low = bss_conf->cqm_rssi_low;
3387                 int high = bss_conf->cqm_rssi_high;
3388
3389                 if (sig < low &&
3390                     (last_event == 0 || last_event >= low)) {
3391                         ifmgd->last_cqm_event_signal = sig;
3392                         ieee80211_cqm_rssi_notify(
3393                                 &sdata->vif,
3394                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3395                                 sig, GFP_KERNEL);
3396                 } else if (sig > high &&
3397                            (last_event == 0 || last_event <= high)) {
3398                         ifmgd->last_cqm_event_signal = sig;
3399                         ieee80211_cqm_rssi_notify(
3400                                 &sdata->vif,
3401                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3402                                 sig, GFP_KERNEL);
3403                 }
3404         }
3405 }
3406
3407 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3408                                      struct ieee80211_mgmt *mgmt, size_t len,
3409                                      struct ieee80211_rx_status *rx_status)
3410 {
3411         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3412         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3413         size_t baselen;
3414         struct ieee802_11_elems elems;
3415         struct ieee80211_local *local = sdata->local;
3416         struct ieee80211_chanctx_conf *chanctx_conf;
3417         struct ieee80211_channel *chan;
3418         struct sta_info *sta;
3419         u32 changed = 0;
3420         bool erp_valid;
3421         u8 erp_value = 0;
3422         u32 ncrc;
3423         u8 *bssid;
3424         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3425
3426         sdata_assert_lock(sdata);
3427
3428         /* Process beacon from the current BSS */
3429         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3430         if (baselen > len)
3431                 return;
3432
3433         rcu_read_lock();
3434         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3435         if (!chanctx_conf) {
3436                 rcu_read_unlock();
3437                 return;
3438         }
3439
3440         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3441                 rcu_read_unlock();
3442                 return;
3443         }
3444         chan = chanctx_conf->def.chan;
3445         rcu_read_unlock();
3446
3447         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3448             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3449                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3450                                        len - baselen, false, &elems);
3451
3452                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3453                 if (elems.tim && !elems.parse_error) {
3454                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3455                         ifmgd->dtim_period = tim_ie->dtim_period;
3456                 }
3457                 ifmgd->have_beacon = true;
3458                 ifmgd->assoc_data->need_beacon = false;
3459                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3460                         sdata->vif.bss_conf.sync_tsf =
3461                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3462                         sdata->vif.bss_conf.sync_device_ts =
3463                                 rx_status->device_timestamp;
3464                         if (elems.tim)
3465                                 sdata->vif.bss_conf.sync_dtim_count =
3466                                         elems.tim->dtim_count;
3467                         else
3468                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3469                 }
3470                 /* continue assoc process */
3471                 ifmgd->assoc_data->timeout = jiffies;
3472                 ifmgd->assoc_data->timeout_started = true;
3473                 run_again(sdata, ifmgd->assoc_data->timeout);
3474                 return;
3475         }
3476
3477         if (!ifmgd->associated ||
3478             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3479                 return;
3480         bssid = ifmgd->associated->bssid;
3481
3482         if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3483                 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3484                                             local, rx_status);
3485
3486         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3487                 mlme_dbg_ratelimited(sdata,
3488                                      "cancelling AP probe due to a received beacon\n");
3489                 ieee80211_reset_ap_probe(sdata);
3490         }
3491
3492         /*
3493          * Push the beacon loss detection into the future since
3494          * we are processing a beacon from the AP just now.
3495          */
3496         ieee80211_sta_reset_beacon_monitor(sdata);
3497
3498         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3499         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3500                                           len - baselen, false, &elems,
3501                                           care_about_ies, ncrc);
3502
3503         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3504             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3505                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3506                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3507                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3508                                 ieee80211_hw_config(local,
3509                                                     IEEE80211_CONF_CHANGE_PS);
3510                         }
3511                         ieee80211_send_nullfunc(local, sdata, false);
3512                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3513                         local->pspolling = true;
3514
3515                         /*
3516                          * Here is assumed that the driver will be
3517                          * able to send ps-poll frame and receive a
3518                          * response even though power save mode is
3519                          * enabled, but some drivers might require
3520                          * to disable power save here. This needs
3521                          * to be investigated.
3522                          */
3523                         ieee80211_send_pspoll(local, sdata);
3524                 }
3525         }
3526
3527         if (sdata->vif.p2p ||
3528             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3529                 struct ieee80211_p2p_noa_attr noa = {};
3530                 int ret;
3531
3532                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3533                                             len - baselen,
3534                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3535                                             (u8 *) &noa, sizeof(noa));
3536                 if (ret >= 2) {
3537                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3538                                 /* valid noa_attr and index changed */
3539                                 sdata->u.mgd.p2p_noa_index = noa.index;
3540                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3541                                 changed |= BSS_CHANGED_P2P_PS;
3542                                 /*
3543                                  * make sure we update all information, the CRC
3544                                  * mechanism doesn't look at P2P attributes.
3545                                  */
3546                                 ifmgd->beacon_crc_valid = false;
3547                         }
3548                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3549                         /* noa_attr not found and we had valid noa_attr before */
3550                         sdata->u.mgd.p2p_noa_index = -1;
3551                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3552                         changed |= BSS_CHANGED_P2P_PS;
3553                         ifmgd->beacon_crc_valid = false;
3554                 }
3555         }
3556
3557         if (ifmgd->csa_waiting_bcn)
3558                 ieee80211_chswitch_post_beacon(sdata);
3559
3560         /*
3561          * Update beacon timing and dtim count on every beacon appearance. This
3562          * will allow the driver to use the most updated values. Do it before
3563          * comparing this one with last received beacon.
3564          * IMPORTANT: These parameters would possibly be out of sync by the time
3565          * the driver will use them. The synchronized view is currently
3566          * guaranteed only in certain callbacks.
3567          */
3568         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3569                 sdata->vif.bss_conf.sync_tsf =
3570                         le64_to_cpu(mgmt->u.beacon.timestamp);
3571                 sdata->vif.bss_conf.sync_device_ts =
3572                         rx_status->device_timestamp;
3573                 if (elems.tim)
3574                         sdata->vif.bss_conf.sync_dtim_count =
3575                                 elems.tim->dtim_count;
3576                 else
3577                         sdata->vif.bss_conf.sync_dtim_count = 0;
3578         }
3579
3580         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3581                 return;
3582         ifmgd->beacon_crc = ncrc;
3583         ifmgd->beacon_crc_valid = true;
3584
3585         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3586
3587         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3588                                          rx_status->device_timestamp,
3589                                          &elems, true);
3590
3591         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3592             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3593                                      elems.wmm_param_len))
3594                 changed |= BSS_CHANGED_QOS;
3595
3596         /*
3597          * If we haven't had a beacon before, tell the driver about the
3598          * DTIM period (and beacon timing if desired) now.
3599          */
3600         if (!ifmgd->have_beacon) {
3601                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3602                 if (elems.tim)
3603                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3604                 else
3605                         bss_conf->dtim_period = 1;
3606
3607                 changed |= BSS_CHANGED_BEACON_INFO;
3608                 ifmgd->have_beacon = true;
3609
3610                 mutex_lock(&local->iflist_mtx);
3611                 ieee80211_recalc_ps(local);
3612                 mutex_unlock(&local->iflist_mtx);
3613
3614                 ieee80211_recalc_ps_vif(sdata);
3615         }
3616
3617         if (elems.erp_info) {
3618                 erp_valid = true;
3619                 erp_value = elems.erp_info[0];
3620         } else {
3621                 erp_valid = false;
3622         }
3623         changed |= ieee80211_handle_bss_capability(sdata,
3624                         le16_to_cpu(mgmt->u.beacon.capab_info),
3625                         erp_valid, erp_value);
3626
3627         mutex_lock(&local->sta_mtx);
3628         sta = sta_info_get(sdata, bssid);
3629
3630         if (ieee80211_config_bw(sdata, sta,
3631                                 elems.ht_cap_elem, elems.ht_operation,
3632                                 elems.vht_operation, bssid, &changed)) {
3633                 mutex_unlock(&local->sta_mtx);
3634                 sdata_info(sdata,
3635                            "failed to follow AP %pM bandwidth change, disconnect\n",
3636                            bssid);
3637                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3638                                        WLAN_REASON_DEAUTH_LEAVING,
3639                                        true, deauth_buf);
3640                 ieee80211_report_disconnect(sdata, deauth_buf,
3641                                             sizeof(deauth_buf), true,
3642                                             WLAN_REASON_DEAUTH_LEAVING);
3643                 return;
3644         }
3645
3646         if (sta && elems.opmode_notif)
3647                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3648                                             rx_status->band);
3649         mutex_unlock(&local->sta_mtx);
3650
3651         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3652                                                elems.country_elem,
3653                                                elems.country_elem_len,
3654                                                elems.pwr_constr_elem,
3655                                                elems.cisco_dtpc_elem);
3656
3657         ieee80211_bss_info_change_notify(sdata, changed);
3658 }
3659
3660 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3661                                   struct sk_buff *skb)
3662 {
3663         struct ieee80211_rx_status *rx_status;
3664         struct ieee80211_mgmt *mgmt;
3665         u16 fc;
3666         struct ieee802_11_elems elems;
3667         int ies_len;
3668
3669         rx_status = (struct ieee80211_rx_status *) skb->cb;
3670         mgmt = (struct ieee80211_mgmt *) skb->data;
3671         fc = le16_to_cpu(mgmt->frame_control);
3672
3673         sdata_lock(sdata);
3674
3675         switch (fc & IEEE80211_FCTL_STYPE) {
3676         case IEEE80211_STYPE_BEACON:
3677                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3678                 break;
3679         case IEEE80211_STYPE_PROBE_RESP:
3680                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3681                 break;
3682         case IEEE80211_STYPE_AUTH:
3683                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3684                 break;
3685         case IEEE80211_STYPE_DEAUTH:
3686                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3687                 break;
3688         case IEEE80211_STYPE_DISASSOC:
3689                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3690                 break;
3691         case IEEE80211_STYPE_ASSOC_RESP:
3692         case IEEE80211_STYPE_REASSOC_RESP:
3693                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3694                 break;
3695         case IEEE80211_STYPE_ACTION:
3696                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3697                         ies_len = skb->len -
3698                                   offsetof(struct ieee80211_mgmt,
3699                                            u.action.u.chan_switch.variable);
3700
3701                         if (ies_len < 0)
3702                                 break;
3703
3704                         ieee802_11_parse_elems(
3705                                 mgmt->u.action.u.chan_switch.variable,
3706                                 ies_len, true, &elems);
3707
3708                         if (elems.parse_error)
3709                                 break;
3710
3711                         ieee80211_sta_process_chanswitch(sdata,
3712                                                  rx_status->mactime,
3713                                                  rx_status->device_timestamp,
3714                                                  &elems, false);
3715                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3716                         ies_len = skb->len -
3717                                   offsetof(struct ieee80211_mgmt,
3718                                            u.action.u.ext_chan_switch.variable);
3719
3720                         if (ies_len < 0)
3721                                 break;
3722
3723                         ieee802_11_parse_elems(
3724                                 mgmt->u.action.u.ext_chan_switch.variable,
3725                                 ies_len, true, &elems);
3726
3727                         if (elems.parse_error)
3728                                 break;
3729
3730                         /* for the handling code pretend this was also an IE */
3731                         elems.ext_chansw_ie =
3732                                 &mgmt->u.action.u.ext_chan_switch.data;
3733
3734                         ieee80211_sta_process_chanswitch(sdata,
3735                                                  rx_status->mactime,
3736                                                  rx_status->device_timestamp,
3737                                                  &elems, false);
3738                 }
3739                 break;
3740         }
3741         sdata_unlock(sdata);
3742 }
3743
3744 static void ieee80211_sta_timer(struct timer_list *t)
3745 {
3746         struct ieee80211_sub_if_data *sdata =
3747                 from_timer(sdata, t, u.mgd.timer);
3748
3749         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3750 }
3751
3752 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3753                                           u8 *bssid, u8 reason, bool tx)
3754 {
3755         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3756
3757         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3758                                tx, frame_buf);
3759
3760         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3761                                     reason);
3762 }
3763
3764 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3765 {
3766         struct ieee80211_local *local = sdata->local;
3767         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3768         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3769         u32 tx_flags = 0;
3770         u16 trans = 1;
3771         u16 status = 0;
3772         u16 prepare_tx_duration = 0;
3773
3774         sdata_assert_lock(sdata);
3775
3776         if (WARN_ON_ONCE(!auth_data))
3777                 return -EINVAL;
3778
3779         auth_data->tries++;
3780
3781         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3782                 sdata_info(sdata, "authentication with %pM timed out\n",
3783                            auth_data->bss->bssid);
3784
3785                 /*
3786                  * Most likely AP is not in the range so remove the
3787                  * bss struct for that AP.
3788                  */
3789                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3790
3791                 return -ETIMEDOUT;
3792         }
3793
3794         if (auth_data->algorithm == WLAN_AUTH_SAE)
3795                 prepare_tx_duration =
3796                         jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
3797
3798         drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
3799
3800         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3801                    auth_data->bss->bssid, auth_data->tries,
3802                    IEEE80211_AUTH_MAX_TRIES);
3803
3804         auth_data->expected_transaction = 2;
3805
3806         if (auth_data->algorithm == WLAN_AUTH_SAE) {
3807                 trans = auth_data->sae_trans;
3808                 status = auth_data->sae_status;
3809                 auth_data->expected_transaction = trans;
3810         }
3811
3812         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3813                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3814                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3815
3816         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3817                             auth_data->data, auth_data->data_len,
3818                             auth_data->bss->bssid,
3819                             auth_data->bss->bssid, NULL, 0, 0,
3820                             tx_flags);
3821
3822         if (tx_flags == 0) {
3823                 if (auth_data->algorithm == WLAN_AUTH_SAE)
3824                         auth_data->timeout = jiffies +
3825                                 IEEE80211_AUTH_TIMEOUT_SAE;
3826                 else
3827                         auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3828         } else {
3829                 auth_data->timeout =
3830                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3831         }
3832
3833         auth_data->timeout_started = true;
3834         run_again(sdata, auth_data->timeout);
3835
3836         return 0;
3837 }
3838
3839 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3840 {
3841         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3842         struct ieee80211_local *local = sdata->local;
3843
3844         sdata_assert_lock(sdata);
3845
3846         assoc_data->tries++;
3847         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3848                 sdata_info(sdata, "association with %pM timed out\n",
3849                            assoc_data->bss->bssid);
3850
3851                 /*
3852                  * Most likely AP is not in the range so remove the
3853                  * bss struct for that AP.
3854                  */
3855                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3856
3857                 return -ETIMEDOUT;
3858         }
3859
3860         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3861                    assoc_data->bss->bssid, assoc_data->tries,
3862                    IEEE80211_ASSOC_MAX_TRIES);
3863         ieee80211_send_assoc(sdata);
3864
3865         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3866                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3867                 assoc_data->timeout_started = true;
3868                 run_again(sdata, assoc_data->timeout);
3869         } else {
3870                 assoc_data->timeout =
3871                         round_jiffies_up(jiffies +
3872                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3873                 assoc_data->timeout_started = true;
3874                 run_again(sdata, assoc_data->timeout);
3875         }
3876
3877         return 0;
3878 }
3879
3880 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3881                                   __le16 fc, bool acked)
3882 {
3883         struct ieee80211_local *local = sdata->local;
3884
3885         sdata->u.mgd.status_fc = fc;
3886         sdata->u.mgd.status_acked = acked;
3887         sdata->u.mgd.status_received = true;
3888
3889         ieee80211_queue_work(&local->hw, &sdata->work);
3890 }
3891
3892 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3893 {
3894         struct ieee80211_local *local = sdata->local;
3895         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3896
3897         sdata_lock(sdata);
3898
3899         if (ifmgd->status_received) {
3900                 __le16 fc = ifmgd->status_fc;
3901                 bool status_acked = ifmgd->status_acked;
3902
3903                 ifmgd->status_received = false;
3904                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3905                         if (status_acked) {
3906                                 if (ifmgd->auth_data->algorithm ==
3907                                     WLAN_AUTH_SAE)
3908                                         ifmgd->auth_data->timeout =
3909                                                 jiffies +
3910                                                 IEEE80211_AUTH_TIMEOUT_SAE;
3911                                 else
3912                                         ifmgd->auth_data->timeout =
3913                                                 jiffies +
3914                                                 IEEE80211_AUTH_TIMEOUT_SHORT;
3915                                 run_again(sdata, ifmgd->auth_data->timeout);
3916                         } else {
3917                                 ifmgd->auth_data->timeout = jiffies - 1;
3918                         }
3919                         ifmgd->auth_data->timeout_started = true;
3920                 } else if (ifmgd->assoc_data &&
3921                            (ieee80211_is_assoc_req(fc) ||
3922                             ieee80211_is_reassoc_req(fc))) {
3923                         if (status_acked) {
3924                                 ifmgd->assoc_data->timeout =
3925                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3926                                 run_again(sdata, ifmgd->assoc_data->timeout);
3927                         } else {
3928                                 ifmgd->assoc_data->timeout = jiffies - 1;
3929                         }
3930                         ifmgd->assoc_data->timeout_started = true;
3931                 }
3932         }
3933
3934         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3935             time_after(jiffies, ifmgd->auth_data->timeout)) {
3936                 if (ifmgd->auth_data->done) {
3937                         /*
3938                          * ok ... we waited for assoc but userspace didn't,
3939                          * so let's just kill the auth data
3940                          */
3941                         ieee80211_destroy_auth_data(sdata, false);
3942                 } else if (ieee80211_auth(sdata)) {
3943                         u8 bssid[ETH_ALEN];
3944                         struct ieee80211_event event = {
3945                                 .type = MLME_EVENT,
3946                                 .u.mlme.data = AUTH_EVENT,
3947                                 .u.mlme.status = MLME_TIMEOUT,
3948                         };
3949
3950                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3951
3952                         ieee80211_destroy_auth_data(sdata, false);
3953
3954                         cfg80211_auth_timeout(sdata->dev, bssid);
3955                         drv_event_callback(sdata->local, sdata, &event);
3956                 }
3957         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3958                 run_again(sdata, ifmgd->auth_data->timeout);
3959
3960         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3961             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3962                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3963                     ieee80211_do_assoc(sdata)) {
3964                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3965                         struct ieee80211_event event = {
3966                                 .type = MLME_EVENT,
3967                                 .u.mlme.data = ASSOC_EVENT,
3968                                 .u.mlme.status = MLME_TIMEOUT,
3969                         };
3970
3971                         ieee80211_destroy_assoc_data(sdata, false, false);
3972                         cfg80211_assoc_timeout(sdata->dev, bss);
3973                         drv_event_callback(sdata->local, sdata, &event);
3974                 }
3975         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3976                 run_again(sdata, ifmgd->assoc_data->timeout);
3977
3978         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3979             ifmgd->associated) {
3980                 u8 bssid[ETH_ALEN];
3981                 int max_tries;
3982
3983                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3984
3985                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3986                         max_tries = max_nullfunc_tries;
3987                 else
3988                         max_tries = max_probe_tries;
3989
3990                 /* ACK received for nullfunc probing frame */
3991                 if (!ifmgd->probe_send_count)
3992                         ieee80211_reset_ap_probe(sdata);
3993                 else if (ifmgd->nullfunc_failed) {
3994                         if (ifmgd->probe_send_count < max_tries) {
3995                                 mlme_dbg(sdata,
3996                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3997                                          bssid, ifmgd->probe_send_count,
3998                                          max_tries);
3999                                 ieee80211_mgd_probe_ap_send(sdata);
4000                         } else {
4001                                 mlme_dbg(sdata,
4002                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4003                                          bssid);
4004                                 ieee80211_sta_connection_lost(sdata, bssid,
4005                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4006                                         false);
4007                         }
4008                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4009                         run_again(sdata, ifmgd->probe_timeout);
4010                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4011                         mlme_dbg(sdata,
4012                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4013                                  bssid, probe_wait_ms);
4014                         ieee80211_sta_connection_lost(sdata, bssid,
4015                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4016                 } else if (ifmgd->probe_send_count < max_tries) {
4017                         mlme_dbg(sdata,
4018                                  "No probe response from AP %pM after %dms, try %d/%i\n",
4019                                  bssid, probe_wait_ms,
4020                                  ifmgd->probe_send_count, max_tries);
4021                         ieee80211_mgd_probe_ap_send(sdata);
4022                 } else {
4023                         /*
4024                          * We actually lost the connection ... or did we?
4025                          * Let's make sure!
4026                          */
4027                         mlme_dbg(sdata,
4028                                  "No probe response from AP %pM after %dms, disconnecting.\n",
4029                                  bssid, probe_wait_ms);
4030
4031                         ieee80211_sta_connection_lost(sdata, bssid,
4032                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4033                 }
4034         }
4035
4036         sdata_unlock(sdata);
4037 }
4038
4039 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4040 {
4041         struct ieee80211_sub_if_data *sdata =
4042                 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4043         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4044
4045         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4046                 return;
4047
4048         sdata->u.mgd.connection_loss = false;
4049         ieee80211_queue_work(&sdata->local->hw,
4050                              &sdata->u.mgd.beacon_connection_loss_work);
4051 }
4052
4053 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4054 {
4055         struct ieee80211_sub_if_data *sdata =
4056                 from_timer(sdata, t, u.mgd.conn_mon_timer);
4057         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4058         struct ieee80211_local *local = sdata->local;
4059
4060         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4061                 return;
4062
4063         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4064 }
4065
4066 static void ieee80211_sta_monitor_work(struct work_struct *work)
4067 {
4068         struct ieee80211_sub_if_data *sdata =
4069                 container_of(work, struct ieee80211_sub_if_data,
4070                              u.mgd.monitor_work);
4071
4072         ieee80211_mgd_probe_ap(sdata, false);
4073 }
4074
4075 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4076 {
4077         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4078                 __ieee80211_stop_poll(sdata);
4079
4080                 /* let's probe the connection once */
4081                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4082                         ieee80211_queue_work(&sdata->local->hw,
4083                                              &sdata->u.mgd.monitor_work);
4084         }
4085 }
4086
4087 #ifdef CONFIG_PM
4088 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4089 {
4090         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4091         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4092
4093         sdata_lock(sdata);
4094
4095         if (ifmgd->auth_data || ifmgd->assoc_data) {
4096                 const u8 *bssid = ifmgd->auth_data ?
4097                                 ifmgd->auth_data->bss->bssid :
4098                                 ifmgd->assoc_data->bss->bssid;
4099
4100                 /*
4101                  * If we are trying to authenticate / associate while suspending,
4102                  * cfg80211 won't know and won't actually abort those attempts,
4103                  * thus we need to do that ourselves.
4104                  */
4105                 ieee80211_send_deauth_disassoc(sdata, bssid,
4106                                                IEEE80211_STYPE_DEAUTH,
4107                                                WLAN_REASON_DEAUTH_LEAVING,
4108                                                false, frame_buf);
4109                 if (ifmgd->assoc_data)
4110                         ieee80211_destroy_assoc_data(sdata, false, true);
4111                 if (ifmgd->auth_data)
4112                         ieee80211_destroy_auth_data(sdata, false);
4113                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4114                                       IEEE80211_DEAUTH_FRAME_LEN);
4115         }
4116
4117         /* This is a bit of a hack - we should find a better and more generic
4118          * solution to this. Normally when suspending, cfg80211 will in fact
4119          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4120          * auth (not so important) or assoc (this is the problem) process.
4121          *
4122          * As a consequence, it can happen that we are in the process of both
4123          * associating and suspending, and receive an association response
4124          * after cfg80211 has checked if it needs to disconnect, but before
4125          * we actually set the flag to drop incoming frames. This will then
4126          * cause the workqueue flush to process the association response in
4127          * the suspend, resulting in a successful association just before it
4128          * tries to remove the interface from the driver, which now though
4129          * has a channel context assigned ... this results in issues.
4130          *
4131          * To work around this (for now) simply deauth here again if we're
4132          * now connected.
4133          */
4134         if (ifmgd->associated && !sdata->local->wowlan) {
4135                 u8 bssid[ETH_ALEN];
4136                 struct cfg80211_deauth_request req = {
4137                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4138                         .bssid = bssid,
4139                 };
4140
4141                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4142                 ieee80211_mgd_deauth(sdata, &req);
4143         }
4144
4145         sdata_unlock(sdata);
4146 }
4147
4148 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4149 {
4150         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4151
4152         sdata_lock(sdata);
4153         if (!ifmgd->associated) {
4154                 sdata_unlock(sdata);
4155                 return;
4156         }
4157
4158         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4159                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4160                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4161                 ieee80211_sta_connection_lost(sdata,
4162                                               ifmgd->associated->bssid,
4163                                               WLAN_REASON_UNSPECIFIED,
4164                                               true);
4165                 sdata_unlock(sdata);
4166                 return;
4167         }
4168         sdata_unlock(sdata);
4169 }
4170 #endif
4171
4172 /* interface setup */
4173 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4174 {
4175         struct ieee80211_if_managed *ifmgd;
4176
4177         ifmgd = &sdata->u.mgd;
4178         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4179         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4180         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4181                   ieee80211_beacon_connection_loss_work);
4182         INIT_WORK(&ifmgd->csa_connection_drop_work,
4183                   ieee80211_csa_connection_drop_work);
4184         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4185         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4186                           ieee80211_tdls_peer_del_work);
4187         timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4188         timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4189         timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4190         timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4191         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4192                           ieee80211_sta_handle_tspec_ac_params_wk);
4193
4194         ifmgd->flags = 0;
4195         ifmgd->powersave = sdata->wdev.ps;
4196         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4197         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4198         ifmgd->p2p_noa_index = -1;
4199
4200         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4201                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4202         else
4203                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4204
4205         /* Setup TDLS data */
4206         spin_lock_init(&ifmgd->teardown_lock);
4207         ifmgd->teardown_skb = NULL;
4208         ifmgd->orig_teardown_skb = NULL;
4209 }
4210
4211 /* scan finished notification */
4212 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4213 {
4214         struct ieee80211_sub_if_data *sdata;
4215
4216         /* Restart STA timers */
4217         rcu_read_lock();
4218         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4219                 if (ieee80211_sdata_running(sdata))
4220                         ieee80211_restart_sta_timer(sdata);
4221         }
4222         rcu_read_unlock();
4223 }
4224
4225 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4226                                      struct cfg80211_bss *cbss)
4227 {
4228         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4229         const u8 *ht_cap_ie, *vht_cap_ie;
4230         const struct ieee80211_ht_cap *ht_cap;
4231         const struct ieee80211_vht_cap *vht_cap;
4232         u8 chains = 1;
4233
4234         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4235                 return chains;
4236
4237         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4238         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4239                 ht_cap = (void *)(ht_cap_ie + 2);
4240                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4241                 /*
4242                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4243                  *       "Tx Unequal Modulation Supported" fields.
4244                  */
4245         }
4246
4247         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4248                 return chains;
4249
4250         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4251         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4252                 u8 nss;
4253                 u16 tx_mcs_map;
4254
4255                 vht_cap = (void *)(vht_cap_ie + 2);
4256                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4257                 for (nss = 8; nss > 0; nss--) {
4258                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4259                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4260                                 break;
4261                 }
4262                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4263                 chains = max(chains, nss);
4264         }
4265
4266         return chains;
4267 }
4268
4269 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4270                                   struct cfg80211_bss *cbss)
4271 {
4272         struct ieee80211_local *local = sdata->local;
4273         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4274         const struct ieee80211_ht_cap *ht_cap = NULL;
4275         const struct ieee80211_ht_operation *ht_oper = NULL;
4276         const struct ieee80211_vht_operation *vht_oper = NULL;
4277         struct ieee80211_supported_band *sband;
4278         struct cfg80211_chan_def chandef;
4279         int ret;
4280         u32 i;
4281         bool have_80mhz;
4282
4283         sband = local->hw.wiphy->bands[cbss->channel->band];
4284
4285         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4286                           IEEE80211_STA_DISABLE_80P80MHZ |
4287                           IEEE80211_STA_DISABLE_160MHZ);
4288
4289         rcu_read_lock();
4290
4291         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4292             sband->ht_cap.ht_supported) {
4293                 const u8 *ht_oper_ie, *ht_cap_ie;
4294
4295                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4296                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4297                         ht_oper = (void *)(ht_oper_ie + 2);
4298
4299                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4300                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4301                         ht_cap = (void *)(ht_cap_ie + 2);
4302
4303                 if (!ht_cap) {
4304                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4305                         ht_oper = NULL;
4306                 }
4307         }
4308
4309         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4310             sband->vht_cap.vht_supported) {
4311                 const u8 *vht_oper_ie, *vht_cap;
4312
4313                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4314                                                    WLAN_EID_VHT_OPERATION);
4315                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4316                         vht_oper = (void *)(vht_oper_ie + 2);
4317                 if (vht_oper && !ht_oper) {
4318                         vht_oper = NULL;
4319                         sdata_info(sdata,
4320                                    "AP advertised VHT without HT, disabling both\n");
4321                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4322                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4323                 }
4324
4325                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4326                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4327                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4328                         vht_oper = NULL;
4329                 }
4330         }
4331
4332         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4333         have_80mhz = false;
4334         for (i = 0; i < sband->n_channels; i++) {
4335                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4336                                                 IEEE80211_CHAN_NO_80MHZ))
4337                         continue;
4338
4339                 have_80mhz = true;
4340                 break;
4341         }
4342
4343         if (!have_80mhz)
4344                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4345
4346         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4347                                                      cbss->channel,
4348                                                      ht_oper, vht_oper,
4349                                                      &chandef, false);
4350
4351         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4352                                       local->rx_chains);
4353
4354         rcu_read_unlock();
4355
4356         /* will change later if needed */
4357         sdata->smps_mode = IEEE80211_SMPS_OFF;
4358
4359         mutex_lock(&local->mtx);
4360         /*
4361          * If this fails (possibly due to channel context sharing
4362          * on incompatible channels, e.g. 80+80 and 160 sharing the
4363          * same control channel) try to use a smaller bandwidth.
4364          */
4365         ret = ieee80211_vif_use_channel(sdata, &chandef,
4366                                         IEEE80211_CHANCTX_SHARED);
4367
4368         /* don't downgrade for 5 and 10 MHz channels, though. */
4369         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4370             chandef.width == NL80211_CHAN_WIDTH_10)
4371                 goto out;
4372
4373         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4374                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4375                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4376                                                 IEEE80211_CHANCTX_SHARED);
4377         }
4378  out:
4379         mutex_unlock(&local->mtx);
4380         return ret;
4381 }
4382
4383 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4384                                      struct cfg80211_bss *cbss, bool assoc,
4385                                      bool override)
4386 {
4387         struct ieee80211_local *local = sdata->local;
4388         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4389         struct ieee80211_bss *bss = (void *)cbss->priv;
4390         struct sta_info *new_sta = NULL;
4391         struct ieee80211_supported_band *sband;
4392         bool have_sta = false;
4393         int err;
4394
4395         sband = local->hw.wiphy->bands[cbss->channel->band];
4396
4397         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4398                 return -EINVAL;
4399
4400         /* If a reconfig is happening, bail out */
4401         if (local->in_reconfig)
4402                 return -EBUSY;
4403
4404         if (assoc) {
4405                 rcu_read_lock();
4406                 have_sta = sta_info_get(sdata, cbss->bssid);
4407                 rcu_read_unlock();
4408         }
4409
4410         if (!have_sta) {
4411                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4412                 if (!new_sta)
4413                         return -ENOMEM;
4414         }
4415
4416         /*
4417          * Set up the information for the new channel before setting the
4418          * new channel. We can't - completely race-free - change the basic
4419          * rates bitmap and the channel (sband) that it refers to, but if
4420          * we set it up before we at least avoid calling into the driver's
4421          * bss_info_changed() method with invalid information (since we do
4422          * call that from changing the channel - only for IDLE and perhaps
4423          * some others, but ...).
4424          *
4425          * So to avoid that, just set up all the new information before the
4426          * channel, but tell the driver to apply it only afterwards, since
4427          * it might need the new channel for that.
4428          */
4429         if (new_sta) {
4430                 u32 rates = 0, basic_rates = 0;
4431                 bool have_higher_than_11mbit;
4432                 int min_rate = INT_MAX, min_rate_index = -1;
4433                 const struct cfg80211_bss_ies *ies;
4434                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4435
4436                 ieee80211_get_rates(sband, bss->supp_rates,
4437                                     bss->supp_rates_len,
4438                                     &rates, &basic_rates,
4439                                     &have_higher_than_11mbit,
4440                                     &min_rate, &min_rate_index,
4441                                     shift);
4442
4443                 /*
4444                  * This used to be a workaround for basic rates missing
4445                  * in the association response frame. Now that we no
4446                  * longer use the basic rates from there, it probably
4447                  * doesn't happen any more, but keep the workaround so
4448                  * in case some *other* APs are buggy in different ways
4449                  * we can connect -- with a warning.
4450                  */
4451                 if (!basic_rates && min_rate_index >= 0) {
4452                         sdata_info(sdata,
4453                                    "No basic rates, using min rate instead\n");
4454                         basic_rates = BIT(min_rate_index);
4455                 }
4456
4457                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4458                 sdata->vif.bss_conf.basic_rates = basic_rates;
4459
4460                 /* cf. IEEE 802.11 9.2.12 */
4461                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4462                     have_higher_than_11mbit)
4463                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4464                 else
4465                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4466
4467                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4468
4469                 /* set timing information */
4470                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4471                 rcu_read_lock();
4472                 ies = rcu_dereference(cbss->beacon_ies);
4473                 if (ies) {
4474                         const u8 *tim_ie;
4475
4476                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4477                         sdata->vif.bss_conf.sync_device_ts =
4478                                 bss->device_ts_beacon;
4479                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4480                                                   ies->data, ies->len);
4481                         if (tim_ie && tim_ie[1] >= 2)
4482                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4483                         else
4484                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4485                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4486                                                TIMING_BEACON_ONLY)) {
4487                         ies = rcu_dereference(cbss->proberesp_ies);
4488                         /* must be non-NULL since beacon IEs were NULL */
4489                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4490                         sdata->vif.bss_conf.sync_device_ts =
4491                                 bss->device_ts_presp;
4492                         sdata->vif.bss_conf.sync_dtim_count = 0;
4493                 } else {
4494                         sdata->vif.bss_conf.sync_tsf = 0;
4495                         sdata->vif.bss_conf.sync_device_ts = 0;
4496                         sdata->vif.bss_conf.sync_dtim_count = 0;
4497                 }
4498                 rcu_read_unlock();
4499         }
4500
4501         if (new_sta || override) {
4502                 err = ieee80211_prep_channel(sdata, cbss);
4503                 if (err) {
4504                         if (new_sta)
4505                                 sta_info_free(local, new_sta);
4506                         return -EINVAL;
4507                 }
4508         }
4509
4510         if (new_sta) {
4511                 /*
4512                  * tell driver about BSSID, basic rates and timing
4513                  * this was set up above, before setting the channel
4514                  */
4515                 ieee80211_bss_info_change_notify(sdata,
4516                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4517                         BSS_CHANGED_BEACON_INT);
4518
4519                 if (assoc)
4520                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4521
4522                 err = sta_info_insert(new_sta);
4523                 new_sta = NULL;
4524                 if (err) {
4525                         sdata_info(sdata,
4526                                    "failed to insert STA entry for the AP (error %d)\n",
4527                                    err);
4528                         return err;
4529                 }
4530         } else
4531                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4532
4533         /* Cancel scan to ensure that nothing interferes with connection */
4534         if (local->scanning)
4535                 ieee80211_scan_cancel(local);
4536
4537         return 0;
4538 }
4539
4540 /* config hooks */
4541 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4542                        struct cfg80211_auth_request *req)
4543 {
4544         struct ieee80211_local *local = sdata->local;
4545         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4546         struct ieee80211_mgd_auth_data *auth_data;
4547         u16 auth_alg;
4548         int err;
4549
4550         /* prepare auth data structure */
4551
4552         switch (req->auth_type) {
4553         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4554                 auth_alg = WLAN_AUTH_OPEN;
4555                 break;
4556         case NL80211_AUTHTYPE_SHARED_KEY:
4557                 if (IS_ERR(local->wep_tx_tfm))
4558                         return -EOPNOTSUPP;
4559                 auth_alg = WLAN_AUTH_SHARED_KEY;
4560                 break;
4561         case NL80211_AUTHTYPE_FT:
4562                 auth_alg = WLAN_AUTH_FT;
4563                 break;
4564         case NL80211_AUTHTYPE_NETWORK_EAP:
4565                 auth_alg = WLAN_AUTH_LEAP;
4566                 break;
4567         case NL80211_AUTHTYPE_SAE:
4568                 auth_alg = WLAN_AUTH_SAE;
4569                 break;
4570         case NL80211_AUTHTYPE_FILS_SK:
4571                 auth_alg = WLAN_AUTH_FILS_SK;
4572                 break;
4573         case NL80211_AUTHTYPE_FILS_SK_PFS:
4574                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4575                 break;
4576         case NL80211_AUTHTYPE_FILS_PK:
4577                 auth_alg = WLAN_AUTH_FILS_PK;
4578                 break;
4579         default:
4580                 return -EOPNOTSUPP;
4581         }
4582
4583         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4584                             req->ie_len, GFP_KERNEL);
4585         if (!auth_data)
4586                 return -ENOMEM;
4587
4588         auth_data->bss = req->bss;
4589
4590         if (req->auth_data_len >= 4) {
4591                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4592                         __le16 *pos = (__le16 *) req->auth_data;
4593
4594                         auth_data->sae_trans = le16_to_cpu(pos[0]);
4595                         auth_data->sae_status = le16_to_cpu(pos[1]);
4596                 }
4597                 memcpy(auth_data->data, req->auth_data + 4,
4598                        req->auth_data_len - 4);
4599                 auth_data->data_len += req->auth_data_len - 4;
4600         }
4601
4602         if (req->ie && req->ie_len) {
4603                 memcpy(&auth_data->data[auth_data->data_len],
4604                        req->ie, req->ie_len);
4605                 auth_data->data_len += req->ie_len;
4606         }
4607
4608         if (req->key && req->key_len) {
4609                 auth_data->key_len = req->key_len;
4610                 auth_data->key_idx = req->key_idx;
4611                 memcpy(auth_data->key, req->key, req->key_len);
4612         }
4613
4614         auth_data->algorithm = auth_alg;
4615
4616         /* try to authenticate/probe */
4617
4618         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4619             ifmgd->assoc_data) {
4620                 err = -EBUSY;
4621                 goto err_free;
4622         }
4623
4624         if (ifmgd->auth_data)
4625                 ieee80211_destroy_auth_data(sdata, false);
4626
4627         /* prep auth_data so we don't go into idle on disassoc */
4628         ifmgd->auth_data = auth_data;
4629
4630         if (ifmgd->associated) {
4631                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4632
4633                 sdata_info(sdata,
4634                            "disconnect from AP %pM for new auth to %pM\n",
4635                            ifmgd->associated->bssid, req->bss->bssid);
4636                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4637                                        WLAN_REASON_UNSPECIFIED,
4638                                        false, frame_buf);
4639
4640                 ieee80211_report_disconnect(sdata, frame_buf,
4641                                             sizeof(frame_buf), true,
4642                                             WLAN_REASON_UNSPECIFIED);
4643         }
4644
4645         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4646
4647         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4648         if (err)
4649                 goto err_clear;
4650
4651         err = ieee80211_auth(sdata);
4652         if (err) {
4653                 sta_info_destroy_addr(sdata, req->bss->bssid);
4654                 goto err_clear;
4655         }
4656
4657         /* hold our own reference */
4658         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4659         return 0;
4660
4661  err_clear:
4662         eth_zero_addr(ifmgd->bssid);
4663         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4664         ifmgd->auth_data = NULL;
4665         mutex_lock(&sdata->local->mtx);
4666         ieee80211_vif_release_channel(sdata);
4667         mutex_unlock(&sdata->local->mtx);
4668  err_free:
4669         kfree(auth_data);
4670         return err;
4671 }
4672
4673 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4674                         struct cfg80211_assoc_request *req)
4675 {
4676         struct ieee80211_local *local = sdata->local;
4677         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4678         struct ieee80211_bss *bss = (void *)req->bss->priv;
4679         struct ieee80211_mgd_assoc_data *assoc_data;
4680         const struct cfg80211_bss_ies *beacon_ies;
4681         struct ieee80211_supported_band *sband;
4682         const u8 *ssidie, *ht_ie, *vht_ie;
4683         int i, err;
4684         bool override = false;
4685
4686         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4687         if (!assoc_data)
4688                 return -ENOMEM;
4689
4690         rcu_read_lock();
4691         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4692         if (!ssidie) {
4693                 rcu_read_unlock();
4694                 kfree(assoc_data);
4695                 return -EINVAL;
4696         }
4697         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4698         assoc_data->ssid_len = ssidie[1];
4699         rcu_read_unlock();
4700
4701         if (ifmgd->associated) {
4702                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4703
4704                 sdata_info(sdata,
4705                            "disconnect from AP %pM for new assoc to %pM\n",
4706                            ifmgd->associated->bssid, req->bss->bssid);
4707                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4708                                        WLAN_REASON_UNSPECIFIED,
4709                                        false, frame_buf);
4710
4711                 ieee80211_report_disconnect(sdata, frame_buf,
4712                                             sizeof(frame_buf), true,
4713                                             WLAN_REASON_UNSPECIFIED);
4714         }
4715
4716         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4717                 err = -EBUSY;
4718                 goto err_free;
4719         }
4720
4721         if (ifmgd->assoc_data) {
4722                 err = -EBUSY;
4723                 goto err_free;
4724         }
4725
4726         if (ifmgd->auth_data) {
4727                 bool match;
4728
4729                 /* keep sta info, bssid if matching */
4730                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4731                 ieee80211_destroy_auth_data(sdata, match);
4732         }
4733
4734         /* prepare assoc data */
4735
4736         ifmgd->beacon_crc_valid = false;
4737
4738         assoc_data->wmm = bss->wmm_used &&
4739                           (local->hw.queues >= IEEE80211_NUM_ACS);
4740
4741         /*
4742          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4743          * We still associate in non-HT mode (11a/b/g) if any one of these
4744          * ciphers is configured as pairwise.
4745          * We can set this to true for non-11n hardware, that'll be checked
4746          * separately along with the peer capabilities.
4747          */
4748         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4749                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4750                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4751                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4752                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4753                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4754                         netdev_info(sdata->dev,
4755                                     "disabling HT/VHT due to WEP/TKIP use\n");
4756                 }
4757         }
4758
4759         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4760         sband = local->hw.wiphy->bands[req->bss->channel->band];
4761         if (!sband->ht_cap.ht_supported ||
4762             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4763             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4764                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4765                 if (!bss->wmm_used &&
4766                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4767                         netdev_info(sdata->dev,
4768                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4769         }
4770
4771         /* disable VHT if we don't support it or the AP doesn't use WMM */
4772         if (!sband->vht_cap.vht_supported ||
4773             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4774             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4775                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4776                 if (!bss->wmm_used &&
4777                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4778                         netdev_info(sdata->dev,
4779                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4780         }
4781
4782         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4783         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4784                sizeof(ifmgd->ht_capa_mask));
4785
4786         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4787         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4788                sizeof(ifmgd->vht_capa_mask));
4789
4790         if (req->ie && req->ie_len) {
4791                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4792                 assoc_data->ie_len = req->ie_len;
4793         }
4794
4795         if (req->fils_kek) {
4796                 /* should already be checked in cfg80211 - so warn */
4797                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4798                         err = -EINVAL;
4799                         goto err_free;
4800                 }
4801                 memcpy(assoc_data->fils_kek, req->fils_kek,
4802                        req->fils_kek_len);
4803                 assoc_data->fils_kek_len = req->fils_kek_len;
4804         }
4805
4806         if (req->fils_nonces)
4807                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4808                        2 * FILS_NONCE_LEN);
4809
4810         assoc_data->bss = req->bss;
4811
4812         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4813                 if (ifmgd->powersave)
4814                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4815                 else
4816                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4817         } else
4818                 sdata->smps_mode = ifmgd->req_smps;
4819
4820         assoc_data->capability = req->bss->capability;
4821         assoc_data->supp_rates = bss->supp_rates;
4822         assoc_data->supp_rates_len = bss->supp_rates_len;
4823
4824         rcu_read_lock();
4825         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4826         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4827                 assoc_data->ap_ht_param =
4828                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4829         else
4830                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4831         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4832         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4833                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4834                        sizeof(struct ieee80211_vht_cap));
4835         else
4836                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4837         rcu_read_unlock();
4838
4839         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4840                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4841              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4842                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4843
4844         if (bss->wmm_used && bss->uapsd_supported &&
4845             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4846                 assoc_data->uapsd = true;
4847                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4848         } else {
4849                 assoc_data->uapsd = false;
4850                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4851         }
4852
4853         if (req->prev_bssid)
4854                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4855
4856         if (req->use_mfp) {
4857                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4858                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4859         } else {
4860                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4861                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4862         }
4863
4864         if (req->flags & ASSOC_REQ_USE_RRM)
4865                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4866         else
4867                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4868
4869         if (req->crypto.control_port)
4870                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4871         else
4872                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4873
4874         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4875         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4876         sdata->control_port_over_nl80211 =
4877                                         req->crypto.control_port_over_nl80211;
4878         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4879                                                         sdata->vif.type);
4880
4881         /* kick off associate process */
4882
4883         ifmgd->assoc_data = assoc_data;
4884         ifmgd->dtim_period = 0;
4885         ifmgd->have_beacon = false;
4886
4887         /* override HT/VHT configuration only if the AP and we support it */
4888         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4889                 struct ieee80211_sta_ht_cap sta_ht_cap;
4890
4891                 if (req->flags & ASSOC_REQ_DISABLE_HT)
4892                         override = true;
4893
4894                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4895                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4896
4897                 /* check for 40 MHz disable override */
4898                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4899                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4900                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4901                         override = true;
4902
4903                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4904                     req->flags & ASSOC_REQ_DISABLE_VHT)
4905                         override = true;
4906         }
4907
4908         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4909                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4910                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4911         }
4912
4913         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4914                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4915
4916         err = ieee80211_prep_connection(sdata, req->bss, true, override);
4917         if (err)
4918                 goto err_clear;
4919
4920         rcu_read_lock();
4921         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4922
4923         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4924             !beacon_ies) {
4925                 /*
4926                  * Wait up to one beacon interval ...
4927                  * should this be more if we miss one?
4928                  */
4929                 sdata_info(sdata, "waiting for beacon from %pM\n",
4930                            ifmgd->bssid);
4931                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4932                 assoc_data->timeout_started = true;
4933                 assoc_data->need_beacon = true;
4934         } else if (beacon_ies) {
4935                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4936                                                     beacon_ies->data,
4937                                                     beacon_ies->len);
4938                 u8 dtim_count = 0;
4939
4940                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4941                         const struct ieee80211_tim_ie *tim;
4942                         tim = (void *)(tim_ie + 2);
4943                         ifmgd->dtim_period = tim->dtim_period;
4944                         dtim_count = tim->dtim_count;
4945                 }
4946                 ifmgd->have_beacon = true;
4947                 assoc_data->timeout = jiffies;
4948                 assoc_data->timeout_started = true;
4949
4950                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4951                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4952                         sdata->vif.bss_conf.sync_device_ts =
4953                                 bss->device_ts_beacon;
4954                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4955                 }
4956         } else {
4957                 assoc_data->timeout = jiffies;
4958                 assoc_data->timeout_started = true;
4959         }
4960         rcu_read_unlock();
4961
4962         run_again(sdata, assoc_data->timeout);
4963
4964         if (bss->corrupt_data) {
4965                 char *corrupt_type = "data";
4966                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4967                         if (bss->corrupt_data &
4968                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4969                                 corrupt_type = "beacon and probe response";
4970                         else
4971                                 corrupt_type = "beacon";
4972                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4973                         corrupt_type = "probe response";
4974                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4975                            corrupt_type);
4976         }
4977
4978         return 0;
4979  err_clear:
4980         eth_zero_addr(ifmgd->bssid);
4981         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4982         ifmgd->assoc_data = NULL;
4983  err_free:
4984         kfree(assoc_data);
4985         return err;
4986 }
4987
4988 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4989                          struct cfg80211_deauth_request *req)
4990 {
4991         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4992         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4993         bool tx = !req->local_state_change;
4994
4995         if (ifmgd->auth_data &&
4996             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4997                 sdata_info(sdata,
4998                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4999                            req->bssid, req->reason_code,
5000                            ieee80211_get_reason_code_string(req->reason_code));
5001
5002                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5003                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5004                                                IEEE80211_STYPE_DEAUTH,
5005                                                req->reason_code, tx,
5006                                                frame_buf);
5007                 ieee80211_destroy_auth_data(sdata, false);
5008                 ieee80211_report_disconnect(sdata, frame_buf,
5009                                             sizeof(frame_buf), true,
5010                                             req->reason_code);
5011
5012                 return 0;
5013         }
5014
5015         if (ifmgd->assoc_data &&
5016             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5017                 sdata_info(sdata,
5018                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
5019                            req->bssid, req->reason_code,
5020                            ieee80211_get_reason_code_string(req->reason_code));
5021
5022                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5023                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5024                                                IEEE80211_STYPE_DEAUTH,
5025                                                req->reason_code, tx,
5026                                                frame_buf);
5027                 ieee80211_destroy_assoc_data(sdata, false, true);
5028                 ieee80211_report_disconnect(sdata, frame_buf,
5029                                             sizeof(frame_buf), true,
5030                                             req->reason_code);
5031                 return 0;
5032         }
5033
5034         if (ifmgd->associated &&
5035             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5036                 sdata_info(sdata,
5037                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5038                            req->bssid, req->reason_code,
5039                            ieee80211_get_reason_code_string(req->reason_code));
5040
5041                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5042                                        req->reason_code, tx, frame_buf);
5043                 ieee80211_report_disconnect(sdata, frame_buf,
5044                                             sizeof(frame_buf), true,
5045                                             req->reason_code);
5046                 return 0;
5047         }
5048
5049         return -ENOTCONN;
5050 }
5051
5052 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5053                            struct cfg80211_disassoc_request *req)
5054 {
5055         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5056         u8 bssid[ETH_ALEN];
5057         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5058
5059         /*
5060          * cfg80211 should catch this ... but it's racy since
5061          * we can receive a disassoc frame, process it, hand it
5062          * to cfg80211 while that's in a locked section already
5063          * trying to tell us that the user wants to disconnect.
5064          */
5065         if (ifmgd->associated != req->bss)
5066                 return -ENOLINK;
5067
5068         sdata_info(sdata,
5069                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5070                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5071
5072         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5073         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5074                                req->reason_code, !req->local_state_change,
5075                                frame_buf);
5076
5077         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5078                                     req->reason_code);
5079
5080         return 0;
5081 }
5082
5083 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5084 {
5085         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5086
5087         /*
5088          * Make sure some work items will not run after this,
5089          * they will not do anything but might not have been
5090          * cancelled when disconnecting.
5091          */
5092         cancel_work_sync(&ifmgd->monitor_work);
5093         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5094         cancel_work_sync(&ifmgd->request_smps_work);
5095         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5096         cancel_work_sync(&ifmgd->chswitch_work);
5097         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5098
5099         sdata_lock(sdata);
5100         if (ifmgd->assoc_data) {
5101                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5102                 ieee80211_destroy_assoc_data(sdata, false, false);
5103                 cfg80211_assoc_timeout(sdata->dev, bss);
5104         }
5105         if (ifmgd->auth_data)
5106                 ieee80211_destroy_auth_data(sdata, false);
5107         spin_lock_bh(&ifmgd->teardown_lock);
5108         if (ifmgd->teardown_skb) {
5109                 kfree_skb(ifmgd->teardown_skb);
5110                 ifmgd->teardown_skb = NULL;
5111                 ifmgd->orig_teardown_skb = NULL;
5112         }
5113         spin_unlock_bh(&ifmgd->teardown_lock);
5114         del_timer_sync(&ifmgd->timer);
5115         sdata_unlock(sdata);
5116 }
5117
5118 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5119                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5120                                s32 rssi_level,
5121                                gfp_t gfp)
5122 {
5123         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5124
5125         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5126
5127         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5128 }
5129 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5130
5131 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5132 {
5133         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5134
5135         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5136
5137         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5138 }
5139 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);