net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  * Copyright 2013-2014  Intel Mobile Communications GmbH
   9  * Copyright (C) 2015 - 2016 Intel Deutschland GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/delay.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/if_arp.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/moduleparam.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/crc32.h>
  24 #include <linux/slab.h>
  25 #include <linux/export.h>
  26 #include <net/mac80211.h>
  27 #include <asm/unaligned.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "led.h"
  33 #include "fils_aead.h"
  34
  35 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  36 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  37 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  38 #define IEEE80211_AUTH_MAX_TRIES        3
  39 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  40 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  41 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  42 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  43 #define IEEE80211_ASSOC_MAX_TRIES       3
  44
  45 static int max_nullfunc_tries = 2;
  46 module_param(max_nullfunc_tries, int, 0644);
  47 MODULE_PARM_DESC(max_nullfunc_tries,
  48                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  49
  50 static int max_probe_tries = 5;
  51 module_param(max_probe_tries, int, 0644);
  52 MODULE_PARM_DESC(max_probe_tries,
  53                  "Maximum probe tries before disconnecting (reason 4).");
  54
  55 /*
  56  * Beacon loss timeout is calculated as N frames times the
  57  * advertised beacon interval.  This may need to be somewhat
  58  * higher than what hardware might detect to account for
  59  * delays in the host processing frames. But since we also
  60  * probe on beacon miss before declaring the connection lost
  61  * default to what we want.
  62  */
  63 static int beacon_loss_count = 7;
  64 module_param(beacon_loss_count, int, 0644);
  65 MODULE_PARM_DESC(beacon_loss_count,
  66                  "Number of beacon intervals before we decide beacon was lost.");
  67
  68 /*
  69  * Time the connection can be idle before we probe
  70  * it to see if we can still talk to the AP.
  71  */
  72 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  73 /*
  74  * Time we wait for a probe response after sending
  75  * a probe request because of beacon loss or for
  76  * checking the connection still works.
  77  */
  78 static int probe_wait_ms = 500;
  79 module_param(probe_wait_ms, int, 0644);
  80 MODULE_PARM_DESC(probe_wait_ms,
  81                  "Maximum time(ms) to wait for probe response"
  82                  " before disconnecting (reason 4).");
  83
  84 /*
  85  * How many Beacon frames need to have been used in average signal strength
  86  * before starting to indicate signal change events.
  87  */
  88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  89
  90 /*
  91  * We can have multiple work items (and connection probing)
  92  * scheduling this timer, but we need to take care to only
  93  * reschedule it when it should fire _earlier_ than it was
  94  * asked for before, or if it's not pending right now. This
  95  * function ensures that. Note that it then is required to
  96  * run this function for all timeouts after the first one
  97  * has happened -- the work that runs from this timer will
  98  * do that.
  99  */
 100 static void run_again(struct ieee80211_sub_if_data *sdata,
 101                       unsigned long timeout)
 102 {
 103         sdata_assert_lock(sdata);
 104
 105         if (!timer_pending(&sdata->u.mgd.timer) ||
 106             time_before(timeout, sdata->u.mgd.timer.expires))
 107                 mod_timer(&sdata->u.mgd.timer, timeout);
 108 }
 109
 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 111 {
 112         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 113                 return;
 114
 115         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 116                 return;
 117
 118         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 119                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 120 }
 121
 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 123 {
 124         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 125
 126         if (unlikely(!ifmgd->associated))
 127                 return;
 128
 129         if (ifmgd->probe_send_count)
 130                 ifmgd->probe_send_count = 0;
 131
 132         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 133                 return;
 134
 135         mod_timer(&ifmgd->conn_mon_timer,
 136                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 137 }
 138
 139 static int ecw2cw(int ecw)
 140 {
 141         return (1 << ecw) - 1;
 142 }
 143
 144 static u32
 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 146                              struct ieee80211_supported_band *sband,
 147                              struct ieee80211_channel *channel,
 148                              const struct ieee80211_ht_cap *ht_cap,
 149                              const struct ieee80211_ht_operation *ht_oper,
 150                              const struct ieee80211_vht_operation *vht_oper,
 151                              struct cfg80211_chan_def *chandef, bool tracking)
 152 {
 153         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 154         struct cfg80211_chan_def vht_chandef;
 155         struct ieee80211_sta_ht_cap sta_ht_cap;
 156         u32 ht_cfreq, ret;
 157
 158         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 159         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 160
 161         chandef->chan = channel;
 162         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 163         chandef->center_freq1 = channel->center_freq;
 164         chandef->center_freq2 = 0;
 165
 166         if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
 167                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 168                 goto out;
 169         }
 170
 171         chandef->width = NL80211_CHAN_WIDTH_20;
 172
 173         if (!(ht_cap->cap_info &
 174               cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
 175                 ret = IEEE80211_STA_DISABLE_40MHZ;
 176                 vht_chandef = *chandef;
 177                 goto out;
 178         }
 179
 180         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 181                                                   channel->band);
 182         /* check that channel matches the right operating channel */
 183         if (!tracking && channel->center_freq != ht_cfreq) {
 184                 /*
 185                  * It's possible that some APs are confused here;
 186                  * Netgear WNDR3700 sometimes reports 4 higher than
 187                  * the actual channel in association responses, but
 188                  * since we look at probe response/beacon data here
 189                  * it should be OK.
 190                  */
 191                 sdata_info(sdata,
 192                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 193                            channel->center_freq, ht_cfreq,
 194                            ht_oper->primary_chan, channel->band);
 195                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 196                 goto out;
 197         }
 198
 199         /* check 40 MHz support, if we have it */
 200         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 201                 ieee80211_chandef_ht_oper(ht_oper, chandef);
 202         } else {
 203                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 204                 ret = IEEE80211_STA_DISABLE_VHT;
 205                 /* also mark 40 MHz disabled */
 206                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 207                 goto out;
 208         }
 209
 210         if (!vht_oper || !sband->vht_cap.vht_supported) {
 211                 ret = IEEE80211_STA_DISABLE_VHT;
 212                 goto out;
 213         }
 214
 215         vht_chandef = *chandef;
 216         if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
 217                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 218                         sdata_info(sdata,
 219                                    "AP VHT information is invalid, disable VHT\n");
 220                 ret = IEEE80211_STA_DISABLE_VHT;
 221                 goto out;
 222         }
 223
 224         if (!cfg80211_chandef_valid(&vht_chandef)) {
 225                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 226                         sdata_info(sdata,
 227                                    "AP VHT information is invalid, disable VHT\n");
 228                 ret = IEEE80211_STA_DISABLE_VHT;
 229                 goto out;
 230         }
 231
 232         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 233                 ret = 0;
 234                 goto out;
 235         }
 236
 237         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 238                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 239                         sdata_info(sdata,
 240                                    "AP VHT information doesn't match HT, disable VHT\n");
 241                 ret = IEEE80211_STA_DISABLE_VHT;
 242                 goto out;
 243         }
 244
 245         *chandef = vht_chandef;
 246
 247         ret = 0;
 248
 249 out:
 250         /*
 251          * When tracking the current AP, don't do any further checks if the
 252          * new chandef is identical to the one we're currently using for the
 253          * connection. This keeps us from playing ping-pong with regulatory,
 254          * without it the following can happen (for example):
 255          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 256          *  - AP advertises regdom US
 257          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 258          *  - the code below detects an unsupported channel, downgrades, and
 259          *    we disconnect from the AP in the caller
 260          *  - disconnect causes CRDA to reload world regdomain and the game
 261          *    starts anew.
 262          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 263          *
 264          * It seems possible that there are still scenarios with CSA or real
 265          * bandwidth changes where a this could happen, but those cases are
 266          * less common and wouldn't completely prevent using the AP.
 267          */
 268         if (tracking &&
 269             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 270                 return ret;
 271
 272         /* don't print the message below for VHT mismatch if VHT is disabled */
 273         if (ret & IEEE80211_STA_DISABLE_VHT)
 274                 vht_chandef = *chandef;
 275
 276         /*
 277          * Ignore the DISABLED flag when we're already connected and only
 278          * tracking the APs beacon for bandwidth changes - otherwise we
 279          * might get disconnected here if we connect to an AP, update our
 280          * regulatory information based on the AP's country IE and the
 281          * information we have is wrong/outdated and disables the channel
 282          * that we're actually using for the connection to the AP.
 283          */
 284         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 285                                         tracking ? 0 :
 286                                                    IEEE80211_CHAN_DISABLED)) {
 287                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 288                         ret = IEEE80211_STA_DISABLE_HT |
 289                               IEEE80211_STA_DISABLE_VHT;
 290                         break;
 291                 }
 292
 293                 ret |= ieee80211_chandef_downgrade(chandef);
 294         }
 295
 296         if (chandef->width != vht_chandef.width && !tracking)
 297                 sdata_info(sdata,
 298                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 299
 300         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 301         return ret;
 302 }
 303
 304 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 305                                struct sta_info *sta,
 306                                const struct ieee80211_ht_cap *ht_cap,
 307                                const struct ieee80211_ht_operation *ht_oper,
 308                                const struct ieee80211_vht_operation *vht_oper,
 309                                const u8 *bssid, u32 *changed)
 310 {
 311         struct ieee80211_local *local = sdata->local;
 312         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 313         struct ieee80211_supported_band *sband;
 314         struct ieee80211_channel *chan;
 315         struct cfg80211_chan_def chandef;
 316         u16 ht_opmode;
 317         u32 flags;
 318         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 319         int ret;
 320
 321         /* if HT was/is disabled, don't track any bandwidth changes */
 322         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 323                 return 0;
 324
 325         /* don't check VHT if we associated as non-VHT station */
 326         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 327                 vht_oper = NULL;
 328
 329         if (WARN_ON_ONCE(!sta))
 330                 return -EINVAL;
 331
 332         /*
 333          * if bss configuration changed store the new one -
 334          * this may be applicable even if channel is identical
 335          */
 336         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 337         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 338                 *changed |= BSS_CHANGED_HT;
 339                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 340         }
 341
 342         chan = sdata->vif.bss_conf.chandef.chan;
 343         sband = local->hw.wiphy->bands[chan->band];
 344
 345         /* calculate new channel (type) based on HT/VHT operation IEs */
 346         flags = ieee80211_determine_chantype(sdata, sband, chan,
 347                                              ht_cap, ht_oper, vht_oper,
 348                                              &chandef, true);
 349
 350         /*
 351          * Downgrade the new channel if we associated with restricted
 352          * capabilities. For example, if we associated as a 20 MHz STA
 353          * to a 40 MHz AP (due to regulatory, capabilities or config
 354          * reasons) then switching to a 40 MHz channel now won't do us
 355          * any good -- we couldn't use it with the AP.
 356          */
 357         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 358             chandef.width == NL80211_CHAN_WIDTH_80P80)
 359                 flags |= ieee80211_chandef_downgrade(&chandef);
 360         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 361             chandef.width == NL80211_CHAN_WIDTH_160)
 362                 flags |= ieee80211_chandef_downgrade(&chandef);
 363         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 364             chandef.width > NL80211_CHAN_WIDTH_20)
 365                 flags |= ieee80211_chandef_downgrade(&chandef);
 366
 367         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 368                 return 0;
 369
 370         sdata_info(sdata,
 371                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 372                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 373                    chandef.center_freq1, chandef.center_freq2);
 374
 375         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 376                                       IEEE80211_STA_DISABLE_VHT |
 377                                       IEEE80211_STA_DISABLE_40MHZ |
 378                                       IEEE80211_STA_DISABLE_80P80MHZ |
 379                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 380             !cfg80211_chandef_valid(&chandef)) {
 381                 sdata_info(sdata,
 382                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 383                            ifmgd->bssid);
 384                 return -EINVAL;
 385         }
 386
 387         switch (chandef.width) {
 388         case NL80211_CHAN_WIDTH_20_NOHT:
 389         case NL80211_CHAN_WIDTH_20:
 390                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 391                 break;
 392         case NL80211_CHAN_WIDTH_40:
 393                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 394                 break;
 395         case NL80211_CHAN_WIDTH_80:
 396                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 397                 break;
 398         case NL80211_CHAN_WIDTH_80P80:
 399         case NL80211_CHAN_WIDTH_160:
 400                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 401                 break;
 402         default:
 403                 return -EINVAL;
 404         }
 405
 406         if (new_sta_bw > sta->cur_max_bandwidth)
 407                 new_sta_bw = sta->cur_max_bandwidth;
 408
 409         if (new_sta_bw < sta->sta.bandwidth) {
 410                 sta->sta.bandwidth = new_sta_bw;
 411                 rate_control_rate_update(local, sband, sta,
 412                                          IEEE80211_RC_BW_CHANGED);
 413         }
 414
 415         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 416         if (ret) {
 417                 sdata_info(sdata,
 418                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 419                            ifmgd->bssid);
 420                 return ret;
 421         }
 422
 423         if (new_sta_bw > sta->sta.bandwidth) {
 424                 sta->sta.bandwidth = new_sta_bw;
 425                 rate_control_rate_update(local, sband, sta,
 426                                          IEEE80211_RC_BW_CHANGED);
 427         }
 428
 429         return 0;
 430 }
 431
 432 /* frame sending functions */
 433
 434 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 435                                 struct sk_buff *skb, u8 ap_ht_param,
 436                                 struct ieee80211_supported_band *sband,
 437                                 struct ieee80211_channel *channel,
 438                                 enum ieee80211_smps_mode smps)
 439 {
 440         u8 *pos;
 441         u32 flags = channel->flags;
 442         u16 cap;
 443         struct ieee80211_sta_ht_cap ht_cap;
 444
 445         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 446
 447         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 448         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 449
 450         /* determine capability flags */
 451         cap = ht_cap.cap;
 452
 453         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 454         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 455                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 456                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 457                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 458                 }
 459                 break;
 460         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 461                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 462                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 463                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 464                 }
 465                 break;
 466         }
 467
 468         /*
 469          * If 40 MHz was disabled associate as though we weren't
 470          * capable of 40 MHz -- some broken APs will never fall
 471          * back to trying to transmit in 20 MHz.
 472          */
 473         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 474                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 475                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 476         }
 477
 478         /* set SM PS mode properly */
 479         cap &= ~IEEE80211_HT_CAP_SM_PS;
 480         switch (smps) {
 481         case IEEE80211_SMPS_AUTOMATIC:
 482         case IEEE80211_SMPS_NUM_MODES:
 483                 WARN_ON(1);
 484         case IEEE80211_SMPS_OFF:
 485                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 486                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 487                 break;
 488         case IEEE80211_SMPS_STATIC:
 489                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 490                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 491                 break;
 492         case IEEE80211_SMPS_DYNAMIC:
 493                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 494                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 495                 break;
 496         }
 497
 498         /* reserve and fill IE */
 499         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 500         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 501 }
 502
 503 /* This function determines vht capability flags for the association
 504  * and builds the IE.
 505  * Note - the function may set the owner of the MU-MIMO capability
 506  */
 507 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 508                                  struct sk_buff *skb,
 509                                  struct ieee80211_supported_band *sband,
 510                                  struct ieee80211_vht_cap *ap_vht_cap)
 511 {
 512         struct ieee80211_local *local = sdata->local;
 513         u8 *pos;
 514         u32 cap;
 515         struct ieee80211_sta_vht_cap vht_cap;
 516         u32 mask, ap_bf_sts, our_bf_sts;
 517
 518         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 519
 520         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 521         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 522
 523         /* determine capability flags */
 524         cap = vht_cap.cap;
 525
 526         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 527                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 528
 529                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 530                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 531                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 532                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 533         }
 534
 535         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 536                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 537                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 538         }
 539
 540         /*
 541          * Some APs apparently get confused if our capabilities are better
 542          * than theirs, so restrict what we advertise in the assoc request.
 543          */
 544         if (!(ap_vht_cap->vht_cap_info &
 545                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 546                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 547                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 548         else if (!(ap_vht_cap->vht_cap_info &
 549                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 550                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 551
 552         /*
 553          * If some other vif is using the MU-MIMO capablity we cannot associate
 554          * using MU-MIMO - this will lead to contradictions in the group-id
 555          * mechanism.
 556          * Ownership is defined since association request, in order to avoid
 557          * simultaneous associations with MU-MIMO.
 558          */
 559         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 560                 bool disable_mu_mimo = false;
 561                 struct ieee80211_sub_if_data *other;
 562
 563                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 564                         if (other->vif.mu_mimo_owner) {
 565                                 disable_mu_mimo = true;
 566                                 break;
 567                         }
 568                 }
 569                 if (disable_mu_mimo)
 570                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 571                 else
 572                         sdata->vif.mu_mimo_owner = true;
 573         }
 574
 575         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 576
 577         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 578         our_bf_sts = cap & mask;
 579
 580         if (ap_bf_sts < our_bf_sts) {
 581                 cap &= ~mask;
 582                 cap |= ap_bf_sts;
 583         }
 584
 585         /* reserve and fill IE */
 586         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 587         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 588 }
 589
 590 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 591 {
 592         struct ieee80211_local *local = sdata->local;
 593         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 594         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 595         struct sk_buff *skb;
 596         struct ieee80211_mgmt *mgmt;
 597         u8 *pos, qos_info;
 598         size_t offset = 0, noffset;
 599         int i, count, rates_len, supp_rates_len, shift;
 600         u16 capab;
 601         struct ieee80211_supported_band *sband;
 602         struct ieee80211_chanctx_conf *chanctx_conf;
 603         struct ieee80211_channel *chan;
 604         u32 rate_flags, rates = 0;
 605
 606         sdata_assert_lock(sdata);
 607
 608         rcu_read_lock();
 609         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 610         if (WARN_ON(!chanctx_conf)) {
 611                 rcu_read_unlock();
 612                 return;
 613         }
 614         chan = chanctx_conf->def.chan;
 615         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 616         rcu_read_unlock();
 617         sband = local->hw.wiphy->bands[chan->band];
 618         shift = ieee80211_vif_get_shift(&sdata->vif);
 619
 620         if (assoc_data->supp_rates_len) {
 621                 /*
 622                  * Get all rates supported by the device and the AP as
 623                  * some APs don't like getting a superset of their rates
 624                  * in the association request (e.g. D-Link DAP 1353 in
 625                  * b-only mode)...
 626                  */
 627                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 628                                                      assoc_data->supp_rates,
 629                                                      assoc_data->supp_rates_len,
 630                                                      &rates);
 631         } else {
 632                 /*
 633                  * In case AP not provide any supported rates information
 634                  * before association, we send information element(s) with
 635                  * all rates that we support.
 636                  */
 637                 rates_len = 0;
 638                 for (i = 0; i < sband->n_bitrates; i++) {
 639                         if ((rate_flags & sband->bitrates[i].flags)
 640                             != rate_flags)
 641                                 continue;
 642                         rates |= BIT(i);
 643                         rates_len++;
 644                 }
 645         }
 646
 647         skb = alloc_skb(local->hw.extra_tx_headroom +
 648                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 649                         2 + assoc_data->ssid_len + /* SSID */
 650                         4 + rates_len + /* (extended) rates */
 651                         4 + /* power capability */
 652                         2 + 2 * sband->n_channels + /* supported channels */
 653                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 654                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 655                         assoc_data->ie_len + /* extra IEs */
 656                         (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
 657                         9, /* WMM */
 658                         GFP_KERNEL);
 659         if (!skb)
 660                 return;
 661
 662         skb_reserve(skb, local->hw.extra_tx_headroom);
 663
 664         capab = WLAN_CAPABILITY_ESS;
 665
 666         if (sband->band == NL80211_BAND_2GHZ) {
 667                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 668                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 669         }
 670
 671         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 672                 capab |= WLAN_CAPABILITY_PRIVACY;
 673
 674         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 675             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 676                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 677
 678         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 679                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 680
 681         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 682         memset(mgmt, 0, 24);
 683         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 684         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 685         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 686
 687         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 688                 skb_put(skb, 10);
 689                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 690                                                   IEEE80211_STYPE_REASSOC_REQ);
 691                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 692                 mgmt->u.reassoc_req.listen_interval =
 693                                 cpu_to_le16(local->hw.conf.listen_interval);
 694                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 695                        ETH_ALEN);
 696         } else {
 697                 skb_put(skb, 4);
 698                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 699                                                   IEEE80211_STYPE_ASSOC_REQ);
 700                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 701                 mgmt->u.assoc_req.listen_interval =
 702                                 cpu_to_le16(local->hw.conf.listen_interval);
 703         }
 704
 705         /* SSID */
 706         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 707         *pos++ = WLAN_EID_SSID;
 708         *pos++ = assoc_data->ssid_len;
 709         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 710
 711         /* add all rates which were marked to be used above */
 712         supp_rates_len = rates_len;
 713         if (supp_rates_len > 8)
 714                 supp_rates_len = 8;
 715
 716         pos = skb_put(skb, supp_rates_len + 2);
 717         *pos++ = WLAN_EID_SUPP_RATES;
 718         *pos++ = supp_rates_len;
 719
 720         count = 0;
 721         for (i = 0; i < sband->n_bitrates; i++) {
 722                 if (BIT(i) & rates) {
 723                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 724                                                 5 * (1 << shift));
 725                         *pos++ = (u8) rate;
 726                         if (++count == 8)
 727                                 break;
 728                 }
 729         }
 730
 731         if (rates_len > count) {
 732                 pos = skb_put(skb, rates_len - count + 2);
 733                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 734                 *pos++ = rates_len - count;
 735
 736                 for (i++; i < sband->n_bitrates; i++) {
 737                         if (BIT(i) & rates) {
 738                                 int rate;
 739                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 740                                                     5 * (1 << shift));
 741                                 *pos++ = (u8) rate;
 742                         }
 743                 }
 744         }
 745
 746         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 747             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 748                 pos = skb_put(skb, 4);
 749                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 750                 *pos++ = 2;
 751                 *pos++ = 0; /* min tx power */
 752                  /* max tx power */
 753                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 754         }
 755
 756         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 757                 /* TODO: get this in reg domain format */
 758                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 759                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 760                 *pos++ = 2 * sband->n_channels;
 761                 for (i = 0; i < sband->n_channels; i++) {
 762                         *pos++ = ieee80211_frequency_to_channel(
 763                                         sband->channels[i].center_freq);
 764                         *pos++ = 1; /* one channel in the subband*/
 765                 }
 766         }
 767
 768         /* if present, add any custom IEs that go before HT */
 769         if (assoc_data->ie_len) {
 770                 static const u8 before_ht[] = {
 771                         WLAN_EID_SSID,
 772                         WLAN_EID_SUPP_RATES,
 773                         WLAN_EID_EXT_SUPP_RATES,
 774                         WLAN_EID_PWR_CAPABILITY,
 775                         WLAN_EID_SUPPORTED_CHANNELS,
 776                         WLAN_EID_RSN,
 777                         WLAN_EID_QOS_CAPA,
 778                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 779                         WLAN_EID_MOBILITY_DOMAIN,
 780                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 781                         WLAN_EID_RIC_DATA,              /* reassoc only */
 782                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 783                 };
 784                 static const u8 after_ric[] = {
 785                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 786                         WLAN_EID_HT_CAPABILITY,
 787                         WLAN_EID_BSS_COEX_2040,
 788                         WLAN_EID_EXT_CAPABILITY,
 789                         WLAN_EID_QOS_TRAFFIC_CAPA,
 790                         WLAN_EID_TIM_BCAST_REQ,
 791                         WLAN_EID_INTERWORKING,
 792                         /* 60GHz doesn't happen right now */
 793                         WLAN_EID_VHT_CAPABILITY,
 794                         WLAN_EID_OPMODE_NOTIF,
 795                 };
 796
 797                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 798                                                  assoc_data->ie_len,
 799                                                  before_ht,
 800                                                  ARRAY_SIZE(before_ht),
 801                                                  after_ric,
 802                                                  ARRAY_SIZE(after_ric),
 803                                                  offset);
 804                 pos = skb_put(skb, noffset - offset);
 805                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 806                 offset = noffset;
 807         }
 808
 809         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 810                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 811                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 812
 813         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 814                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 815                                     sband, chan, sdata->smps_mode);
 816
 817         /* if present, add any custom IEs that go before VHT */
 818         if (assoc_data->ie_len) {
 819                 static const u8 before_vht[] = {
 820                         WLAN_EID_SSID,
 821                         WLAN_EID_SUPP_RATES,
 822                         WLAN_EID_EXT_SUPP_RATES,
 823                         WLAN_EID_PWR_CAPABILITY,
 824                         WLAN_EID_SUPPORTED_CHANNELS,
 825                         WLAN_EID_RSN,
 826                         WLAN_EID_QOS_CAPA,
 827                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 828                         WLAN_EID_MOBILITY_DOMAIN,
 829                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 830                         WLAN_EID_HT_CAPABILITY,
 831                         WLAN_EID_BSS_COEX_2040,
 832                         WLAN_EID_EXT_CAPABILITY,
 833                         WLAN_EID_QOS_TRAFFIC_CAPA,
 834                         WLAN_EID_TIM_BCAST_REQ,
 835                         WLAN_EID_INTERWORKING,
 836                 };
 837
 838                 /* RIC already taken above, so no need to handle here anymore */
 839                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 840                                              before_vht, ARRAY_SIZE(before_vht),
 841                                              offset);
 842                 pos = skb_put(skb, noffset - offset);
 843                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 844                 offset = noffset;
 845         }
 846
 847         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 848                 ieee80211_add_vht_ie(sdata, skb, sband,
 849                                      &assoc_data->ap_vht_cap);
 850
 851         /* if present, add any custom non-vendor IEs that go after HT */
 852         if (assoc_data->ie_len) {
 853                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 854                                                     assoc_data->ie_len,
 855                                                     offset);
 856                 pos = skb_put(skb, noffset - offset);
 857                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 858                 offset = noffset;
 859         }
 860
 861         if (assoc_data->wmm) {
 862                 if (assoc_data->uapsd) {
 863                         qos_info = ifmgd->uapsd_queues;
 864                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 865                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 866                 } else {
 867                         qos_info = 0;
 868                 }
 869
 870                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 871         }
 872
 873         /* add any remaining custom (i.e. vendor specific here) IEs */
 874         if (assoc_data->ie_len) {
 875                 noffset = assoc_data->ie_len;
 876                 pos = skb_put(skb, noffset - offset);
 877                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 878         }
 879
 880         if (assoc_data->fils_kek_len &&
 881             fils_encrypt_assoc_req(skb, assoc_data) < 0) {
 882                 dev_kfree_skb(skb);
 883                 return;
 884         }
 885
 886         drv_mgd_prepare_tx(local, sdata);
 887
 888         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 889         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 890                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 891                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 892         ieee80211_tx_skb(sdata, skb);
 893 }
 894
 895 void ieee80211_send_pspoll(struct ieee80211_local *local,
 896                            struct ieee80211_sub_if_data *sdata)
 897 {
 898         struct ieee80211_pspoll *pspoll;
 899         struct sk_buff *skb;
 900
 901         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 902         if (!skb)
 903                 return;
 904
 905         pspoll = (struct ieee80211_pspoll *) skb->data;
 906         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 907
 908         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 909         ieee80211_tx_skb(sdata, skb);
 910 }
 911
 912 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 913                              struct ieee80211_sub_if_data *sdata,
 914                              bool powersave)
 915 {
 916         struct sk_buff *skb;
 917         struct ieee80211_hdr_3addr *nullfunc;
 918         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 919
 920         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 921         if (!skb)
 922                 return;
 923
 924         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 925         if (powersave)
 926                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 927
 928         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 929                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 930
 931         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 932                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 933
 934         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 935                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 936
 937         ieee80211_tx_skb(sdata, skb);
 938 }
 939
 940 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 941                                           struct ieee80211_sub_if_data *sdata)
 942 {
 943         struct sk_buff *skb;
 944         struct ieee80211_hdr *nullfunc;
 945         __le16 fc;
 946
 947         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 948                 return;
 949
 950         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 951         if (!skb)
 952                 return;
 953
 954         skb_reserve(skb, local->hw.extra_tx_headroom);
 955
 956         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 957         memset(nullfunc, 0, 30);
 958         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 959                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 960         nullfunc->frame_control = fc;
 961         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 962         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 963         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 964         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 965
 966         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 967         ieee80211_tx_skb(sdata, skb);
 968 }
 969
 970 /* spectrum management related things */
 971 static void ieee80211_chswitch_work(struct work_struct *work)
 972 {
 973         struct ieee80211_sub_if_data *sdata =
 974                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 975         struct ieee80211_local *local = sdata->local;
 976         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 977         int ret;
 978
 979         if (!ieee80211_sdata_running(sdata))
 980                 return;
 981
 982         sdata_lock(sdata);
 983         mutex_lock(&local->mtx);
 984         mutex_lock(&local->chanctx_mtx);
 985
 986         if (!ifmgd->associated)
 987                 goto out;
 988
 989         if (!sdata->vif.csa_active)
 990                 goto out;
 991
 992         /*
 993          * using reservation isn't immediate as it may be deferred until later
 994          * with multi-vif. once reservation is complete it will re-schedule the
 995          * work with no reserved_chanctx so verify chandef to check if it
 996          * completed successfully
 997          */
 998
 999         if (sdata->reserved_chanctx) {
1000                 /*
1001                  * with multi-vif csa driver may call ieee80211_csa_finish()
1002                  * many times while waiting for other interfaces to use their
1003                  * reservations
1004                  */
1005                 if (sdata->reserved_ready)
1006                         goto out;
1007
1008                 ret = ieee80211_vif_use_reserved_context(sdata);
1009                 if (ret) {
1010                         sdata_info(sdata,
1011                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1012                                    ret);
1013                         ieee80211_queue_work(&sdata->local->hw,
1014                                              &ifmgd->csa_connection_drop_work);
1015                         goto out;
1016                 }
1017
1018                 goto out;
1019         }
1020
1021         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1022                                         &sdata->csa_chandef)) {
1023                 sdata_info(sdata,
1024                            "failed to finalize channel switch, disconnecting\n");
1025                 ieee80211_queue_work(&sdata->local->hw,
1026                                      &ifmgd->csa_connection_drop_work);
1027                 goto out;
1028         }
1029
1030         /* XXX: shouldn't really modify cfg80211-owned data! */
1031         ifmgd->associated->channel = sdata->csa_chandef.chan;
1032
1033         ifmgd->csa_waiting_bcn = true;
1034
1035         ieee80211_sta_reset_beacon_monitor(sdata);
1036         ieee80211_sta_reset_conn_monitor(sdata);
1037
1038 out:
1039         mutex_unlock(&local->chanctx_mtx);
1040         mutex_unlock(&local->mtx);
1041         sdata_unlock(sdata);
1042 }
1043
1044 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1045 {
1046         struct ieee80211_local *local = sdata->local;
1047         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1048         int ret;
1049
1050         sdata_assert_lock(sdata);
1051
1052         WARN_ON(!sdata->vif.csa_active);
1053
1054         if (sdata->csa_block_tx) {
1055                 ieee80211_wake_vif_queues(local, sdata,
1056                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1057                 sdata->csa_block_tx = false;
1058         }
1059
1060         sdata->vif.csa_active = false;
1061         ifmgd->csa_waiting_bcn = false;
1062
1063         ret = drv_post_channel_switch(sdata);
1064         if (ret) {
1065                 sdata_info(sdata,
1066                            "driver post channel switch failed, disconnecting\n");
1067                 ieee80211_queue_work(&local->hw,
1068                                      &ifmgd->csa_connection_drop_work);
1069                 return;
1070         }
1071
1072         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1073 }
1074
1075 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1076 {
1077         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1078         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1079
1080         trace_api_chswitch_done(sdata, success);
1081         if (!success) {
1082                 sdata_info(sdata,
1083                            "driver channel switch failed, disconnecting\n");
1084                 ieee80211_queue_work(&sdata->local->hw,
1085                                      &ifmgd->csa_connection_drop_work);
1086         } else {
1087                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1088         }
1089 }
1090 EXPORT_SYMBOL(ieee80211_chswitch_done);
1091
1092 static void ieee80211_chswitch_timer(unsigned long data)
1093 {
1094         struct ieee80211_sub_if_data *sdata =
1095                 (struct ieee80211_sub_if_data *) data;
1096
1097         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1098 }
1099
1100 static void
1101 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1102                                  u64 timestamp, u32 device_timestamp,
1103                                  struct ieee802_11_elems *elems,
1104                                  bool beacon)
1105 {
1106         struct ieee80211_local *local = sdata->local;
1107         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1108         struct cfg80211_bss *cbss = ifmgd->associated;
1109         struct ieee80211_chanctx_conf *conf;
1110         struct ieee80211_chanctx *chanctx;
1111         enum nl80211_band current_band;
1112         struct ieee80211_csa_ie csa_ie;
1113         struct ieee80211_channel_switch ch_switch;
1114         int res;
1115
1116         sdata_assert_lock(sdata);
1117
1118         if (!cbss)
1119                 return;
1120
1121         if (local->scanning)
1122                 return;
1123
1124         /* disregard subsequent announcements if we are already processing */
1125         if (sdata->vif.csa_active)
1126                 return;
1127
1128         current_band = cbss->channel->band;
1129         memset(&csa_ie, 0, sizeof(csa_ie));
1130         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1131                                            ifmgd->flags,
1132                                            ifmgd->associated->bssid, &csa_ie);
1133         if (res < 0)
1134                 ieee80211_queue_work(&local->hw,
1135                                      &ifmgd->csa_connection_drop_work);
1136         if (res)
1137                 return;
1138
1139         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1140                                      IEEE80211_CHAN_DISABLED)) {
1141                 sdata_info(sdata,
1142                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1143                            ifmgd->associated->bssid,
1144                            csa_ie.chandef.chan->center_freq,
1145                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1146                            csa_ie.chandef.center_freq2);
1147                 ieee80211_queue_work(&local->hw,
1148                                      &ifmgd->csa_connection_drop_work);
1149                 return;
1150         }
1151
1152         if (cfg80211_chandef_identical(&csa_ie.chandef,
1153                                        &sdata->vif.bss_conf.chandef)) {
1154                 if (ifmgd->csa_ignored_same_chan)
1155                         return;
1156                 sdata_info(sdata,
1157                            "AP %pM tries to chanswitch to same channel, ignore\n",
1158                            ifmgd->associated->bssid);
1159                 ifmgd->csa_ignored_same_chan = true;
1160                 return;
1161         }
1162
1163         /*
1164          * Drop all TDLS peers - either we disconnect or move to a different
1165          * channel from this point on. There's no telling what our peer will do.
1166          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1167          * have an incompatible wider chandef.
1168          */
1169         ieee80211_teardown_tdls_peers(sdata);
1170
1171         mutex_lock(&local->mtx);
1172         mutex_lock(&local->chanctx_mtx);
1173         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1174                                          lockdep_is_held(&local->chanctx_mtx));
1175         if (!conf) {
1176                 sdata_info(sdata,
1177                            "no channel context assigned to vif?, disconnecting\n");
1178                 goto drop_connection;
1179         }
1180
1181         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1182
1183         if (local->use_chanctx &&
1184             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1185                 sdata_info(sdata,
1186                            "driver doesn't support chan-switch with channel contexts\n");
1187                 goto drop_connection;
1188         }
1189
1190         ch_switch.timestamp = timestamp;
1191         ch_switch.device_timestamp = device_timestamp;
1192         ch_switch.block_tx = csa_ie.mode;
1193         ch_switch.chandef = csa_ie.chandef;
1194         ch_switch.count = csa_ie.count;
1195
1196         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1197                 sdata_info(sdata,
1198                            "preparing for channel switch failed, disconnecting\n");
1199                 goto drop_connection;
1200         }
1201
1202         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1203                                             chanctx->mode, false);
1204         if (res) {
1205                 sdata_info(sdata,
1206                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1207                            res);
1208                 goto drop_connection;
1209         }
1210         mutex_unlock(&local->chanctx_mtx);
1211
1212         sdata->vif.csa_active = true;
1213         sdata->csa_chandef = csa_ie.chandef;
1214         sdata->csa_block_tx = csa_ie.mode;
1215         ifmgd->csa_ignored_same_chan = false;
1216
1217         if (sdata->csa_block_tx)
1218                 ieee80211_stop_vif_queues(local, sdata,
1219                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1220         mutex_unlock(&local->mtx);
1221
1222         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1223                                           csa_ie.count);
1224
1225         if (local->ops->channel_switch) {
1226                 /* use driver's channel switch callback */
1227                 drv_channel_switch(local, sdata, &ch_switch);
1228                 return;
1229         }
1230
1231         /* channel switch handled in software */
1232         if (csa_ie.count <= 1)
1233                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1234         else
1235                 mod_timer(&ifmgd->chswitch_timer,
1236                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1237                                          cbss->beacon_interval));
1238         return;
1239  drop_connection:
1240         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1241         mutex_unlock(&local->chanctx_mtx);
1242         mutex_unlock(&local->mtx);
1243 }
1244
1245 static bool
1246 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1247                                  struct ieee80211_channel *channel,
1248                                  const u8 *country_ie, u8 country_ie_len,
1249                                  const u8 *pwr_constr_elem,
1250                                  int *chan_pwr, int *pwr_reduction)
1251 {
1252         struct ieee80211_country_ie_triplet *triplet;
1253         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1254         int i, chan_increment;
1255         bool have_chan_pwr = false;
1256
1257         /* Invalid IE */
1258         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1259                 return false;
1260
1261         triplet = (void *)(country_ie + 3);
1262         country_ie_len -= 3;
1263
1264         switch (channel->band) {
1265         default:
1266                 WARN_ON_ONCE(1);
1267                 /* fall through */
1268         case NL80211_BAND_2GHZ:
1269         case NL80211_BAND_60GHZ:
1270                 chan_increment = 1;
1271                 break;
1272         case NL80211_BAND_5GHZ:
1273                 chan_increment = 4;
1274                 break;
1275         }
1276
1277         /* find channel */
1278         while (country_ie_len >= 3) {
1279                 u8 first_channel = triplet->chans.first_channel;
1280
1281                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1282                         goto next;
1283
1284                 for (i = 0; i < triplet->chans.num_channels; i++) {
1285                         if (first_channel + i * chan_increment == chan) {
1286                                 have_chan_pwr = true;
1287                                 *chan_pwr = triplet->chans.max_power;
1288                                 break;
1289                         }
1290                 }
1291                 if (have_chan_pwr)
1292                         break;
1293
1294  next:
1295                 triplet++;
1296                 country_ie_len -= 3;
1297         }
1298
1299         if (have_chan_pwr && pwr_constr_elem)
1300                 *pwr_reduction = *pwr_constr_elem;
1301         else
1302                 *pwr_reduction = 0;
1303
1304         return have_chan_pwr;
1305 }
1306
1307 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1308                                       struct ieee80211_channel *channel,
1309                                       const u8 *cisco_dtpc_ie,
1310                                       int *pwr_level)
1311 {
1312         /* From practical testing, the first data byte of the DTPC element
1313          * seems to contain the requested dBm level, and the CLI on Cisco
1314          * APs clearly state the range is -127 to 127 dBm, which indicates
1315          * a signed byte, although it seemingly never actually goes negative.
1316          * The other byte seems to always be zero.
1317          */
1318         *pwr_level = (__s8)cisco_dtpc_ie[4];
1319 }
1320
1321 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1322                                        struct ieee80211_channel *channel,
1323                                        struct ieee80211_mgmt *mgmt,
1324                                        const u8 *country_ie, u8 country_ie_len,
1325                                        const u8 *pwr_constr_ie,
1326                                        const u8 *cisco_dtpc_ie)
1327 {
1328         bool has_80211h_pwr = false, has_cisco_pwr = false;
1329         int chan_pwr = 0, pwr_reduction_80211h = 0;
1330         int pwr_level_cisco, pwr_level_80211h;
1331         int new_ap_level;
1332         __le16 capab = mgmt->u.probe_resp.capab_info;
1333
1334         if (country_ie &&
1335             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1336              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1337                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1338                         sdata, channel, country_ie, country_ie_len,
1339                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1340                 pwr_level_80211h =
1341                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1342         }
1343
1344         if (cisco_dtpc_ie) {
1345                 ieee80211_find_cisco_dtpc(
1346                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1347                 has_cisco_pwr = true;
1348         }
1349
1350         if (!has_80211h_pwr && !has_cisco_pwr)
1351                 return 0;
1352
1353         /* If we have both 802.11h and Cisco DTPC, apply both limits
1354          * by picking the smallest of the two power levels advertised.
1355          */
1356         if (has_80211h_pwr &&
1357             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1358                 new_ap_level = pwr_level_80211h;
1359
1360                 if (sdata->ap_power_level == new_ap_level)
1361                         return 0;
1362
1363                 sdata_dbg(sdata,
1364                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1365                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1366                           sdata->u.mgd.bssid);
1367         } else {  /* has_cisco_pwr is always true here. */
1368                 new_ap_level = pwr_level_cisco;
1369
1370                 if (sdata->ap_power_level == new_ap_level)
1371                         return 0;
1372
1373                 sdata_dbg(sdata,
1374                           "Limiting TX power to %d dBm as advertised by %pM\n",
1375                           pwr_level_cisco, sdata->u.mgd.bssid);
1376         }
1377
1378         sdata->ap_power_level = new_ap_level;
1379         if (__ieee80211_recalc_txpower(sdata))
1380                 return BSS_CHANGED_TXPOWER;
1381         return 0;
1382 }
1383
1384 /* powersave */
1385 static void ieee80211_enable_ps(struct ieee80211_local *local,
1386                                 struct ieee80211_sub_if_data *sdata)
1387 {
1388         struct ieee80211_conf *conf = &local->hw.conf;
1389
1390         /*
1391          * If we are scanning right now then the parameters will
1392          * take effect when scan finishes.
1393          */
1394         if (local->scanning)
1395                 return;
1396
1397         if (conf->dynamic_ps_timeout > 0 &&
1398             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1399                 mod_timer(&local->dynamic_ps_timer, jiffies +
1400                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1401         } else {
1402                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1403                         ieee80211_send_nullfunc(local, sdata, true);
1404
1405                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1406                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1407                         return;
1408
1409                 conf->flags |= IEEE80211_CONF_PS;
1410                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1411         }
1412 }
1413
1414 static void ieee80211_change_ps(struct ieee80211_local *local)
1415 {
1416         struct ieee80211_conf *conf = &local->hw.conf;
1417
1418         if (local->ps_sdata) {
1419                 ieee80211_enable_ps(local, local->ps_sdata);
1420         } else if (conf->flags & IEEE80211_CONF_PS) {
1421                 conf->flags &= ~IEEE80211_CONF_PS;
1422                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1423                 del_timer_sync(&local->dynamic_ps_timer);
1424                 cancel_work_sync(&local->dynamic_ps_enable_work);
1425         }
1426 }
1427
1428 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1429 {
1430         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1431         struct sta_info *sta = NULL;
1432         bool authorized = false;
1433
1434         if (!mgd->powersave)
1435                 return false;
1436
1437         if (mgd->broken_ap)
1438                 return false;
1439
1440         if (!mgd->associated)
1441                 return false;
1442
1443         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1444                 return false;
1445
1446         if (!mgd->have_beacon)
1447                 return false;
1448
1449         rcu_read_lock();
1450         sta = sta_info_get(sdata, mgd->bssid);
1451         if (sta)
1452                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1453         rcu_read_unlock();
1454
1455         return authorized;
1456 }
1457
1458 /* need to hold RTNL or interface lock */
1459 void ieee80211_recalc_ps(struct ieee80211_local *local)
1460 {
1461         struct ieee80211_sub_if_data *sdata, *found = NULL;
1462         int count = 0;
1463         int timeout;
1464
1465         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1466                 local->ps_sdata = NULL;
1467                 return;
1468         }
1469
1470         list_for_each_entry(sdata, &local->interfaces, list) {
1471                 if (!ieee80211_sdata_running(sdata))
1472                         continue;
1473                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1474                         /* If an AP vif is found, then disable PS
1475                          * by setting the count to zero thereby setting
1476                          * ps_sdata to NULL.
1477                          */
1478                         count = 0;
1479                         break;
1480                 }
1481                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1482                         continue;
1483                 found = sdata;
1484                 count++;
1485         }
1486
1487         if (count == 1 && ieee80211_powersave_allowed(found)) {
1488                 u8 dtimper = found->u.mgd.dtim_period;
1489                 s32 beaconint_us;
1490
1491                 beaconint_us = ieee80211_tu_to_usec(
1492                                         found->vif.bss_conf.beacon_int);
1493
1494                 timeout = local->dynamic_ps_forced_timeout;
1495                 if (timeout < 0)
1496                         timeout = 100;
1497                 local->hw.conf.dynamic_ps_timeout = timeout;
1498
1499                 /* If the TIM IE is invalid, pretend the value is 1 */
1500                 if (!dtimper)
1501                         dtimper = 1;
1502
1503                 local->hw.conf.ps_dtim_period = dtimper;
1504                 local->ps_sdata = found;
1505         } else {
1506                 local->ps_sdata = NULL;
1507         }
1508
1509         ieee80211_change_ps(local);
1510 }
1511
1512 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1513 {
1514         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1515
1516         if (sdata->vif.bss_conf.ps != ps_allowed) {
1517                 sdata->vif.bss_conf.ps = ps_allowed;
1518                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1519         }
1520 }
1521
1522 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1523 {
1524         struct ieee80211_local *local =
1525                 container_of(work, struct ieee80211_local,
1526                              dynamic_ps_disable_work);
1527
1528         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1529                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1530                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1531         }
1532
1533         ieee80211_wake_queues_by_reason(&local->hw,
1534                                         IEEE80211_MAX_QUEUE_MAP,
1535                                         IEEE80211_QUEUE_STOP_REASON_PS,
1536                                         false);
1537 }
1538
1539 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1540 {
1541         struct ieee80211_local *local =
1542                 container_of(work, struct ieee80211_local,
1543                              dynamic_ps_enable_work);
1544         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1545         struct ieee80211_if_managed *ifmgd;
1546         unsigned long flags;
1547         int q;
1548
1549         /* can only happen when PS was just disabled anyway */
1550         if (!sdata)
1551                 return;
1552
1553         ifmgd = &sdata->u.mgd;
1554
1555         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1556                 return;
1557
1558         if (local->hw.conf.dynamic_ps_timeout > 0) {
1559                 /* don't enter PS if TX frames are pending */
1560                 if (drv_tx_frames_pending(local)) {
1561                         mod_timer(&local->dynamic_ps_timer, jiffies +
1562                                   msecs_to_jiffies(
1563                                   local->hw.conf.dynamic_ps_timeout));
1564                         return;
1565                 }
1566
1567                 /*
1568                  * transmission can be stopped by others which leads to
1569                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1570                  * is not the actual idle state.
1571                  */
1572                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1573                 for (q = 0; q < local->hw.queues; q++) {
1574                         if (local->queue_stop_reasons[q]) {
1575                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1576                                                        flags);
1577                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1578                                           msecs_to_jiffies(
1579                                           local->hw.conf.dynamic_ps_timeout));
1580                                 return;
1581                         }
1582                 }
1583                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1584         }
1585
1586         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1587             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1588                 if (drv_tx_frames_pending(local)) {
1589                         mod_timer(&local->dynamic_ps_timer, jiffies +
1590                                   msecs_to_jiffies(
1591                                   local->hw.conf.dynamic_ps_timeout));
1592                 } else {
1593                         ieee80211_send_nullfunc(local, sdata, true);
1594                         /* Flush to get the tx status of nullfunc frame */
1595                         ieee80211_flush_queues(local, sdata, false);
1596                 }
1597         }
1598
1599         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1600               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1601             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1602                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1603                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1604                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1605         }
1606 }
1607
1608 void ieee80211_dynamic_ps_timer(unsigned long data)
1609 {
1610         struct ieee80211_local *local = (void *) data;
1611
1612         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1613 }
1614
1615 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1616 {
1617         struct delayed_work *delayed_work = to_delayed_work(work);
1618         struct ieee80211_sub_if_data *sdata =
1619                 container_of(delayed_work, struct ieee80211_sub_if_data,
1620                              dfs_cac_timer_work);
1621         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1622
1623         mutex_lock(&sdata->local->mtx);
1624         if (sdata->wdev.cac_started) {
1625                 ieee80211_vif_release_channel(sdata);
1626                 cfg80211_cac_event(sdata->dev, &chandef,
1627                                    NL80211_RADAR_CAC_FINISHED,
1628                                    GFP_KERNEL);
1629         }
1630         mutex_unlock(&sdata->local->mtx);
1631 }
1632
1633 static bool
1634 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1635 {
1636         struct ieee80211_local *local = sdata->local;
1637         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1638         bool ret = false;
1639         int ac;
1640
1641         if (local->hw.queues < IEEE80211_NUM_ACS)
1642                 return false;
1643
1644         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1645                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1646                 int non_acm_ac;
1647                 unsigned long now = jiffies;
1648
1649                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1650                     tx_tspec->admitted_time &&
1651                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1652                         tx_tspec->consumed_tx_time = 0;
1653                         tx_tspec->time_slice_start = now;
1654
1655                         if (tx_tspec->downgraded)
1656                                 tx_tspec->action =
1657                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1658                 }
1659
1660                 switch (tx_tspec->action) {
1661                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1662                         /* take the original parameters */
1663                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1664                                 sdata_err(sdata,
1665                                           "failed to set TX queue parameters for queue %d\n",
1666                                           ac);
1667                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1668                         tx_tspec->downgraded = false;
1669                         ret = true;
1670                         break;
1671                 case TX_TSPEC_ACTION_DOWNGRADE:
1672                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1673                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1674                                 ret = true;
1675                                 break;
1676                         }
1677                         /* downgrade next lower non-ACM AC */
1678                         for (non_acm_ac = ac + 1;
1679                              non_acm_ac < IEEE80211_NUM_ACS;
1680                              non_acm_ac++)
1681                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1682                                         break;
1683                         /* Usually the loop will result in using BK even if it
1684                          * requires admission control, but such a configuration
1685                          * makes no sense and we have to transmit somehow - the
1686                          * AC selection does the same thing.
1687                          * If we started out trying to downgrade from BK, then
1688                          * the extra condition here might be needed.
1689                          */
1690                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1691                                 non_acm_ac = IEEE80211_AC_BK;
1692                         if (drv_conf_tx(local, sdata, ac,
1693                                         &sdata->tx_conf[non_acm_ac]))
1694                                 sdata_err(sdata,
1695                                           "failed to set TX queue parameters for queue %d\n",
1696                                           ac);
1697                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1698                         ret = true;
1699                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1700                                 tx_tspec->time_slice_start + HZ - now + 1);
1701                         break;
1702                 case TX_TSPEC_ACTION_NONE:
1703                         /* nothing now */
1704                         break;
1705                 }
1706         }
1707
1708         return ret;
1709 }
1710
1711 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1712 {
1713         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1714                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1715 }
1716
1717 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1718 {
1719         struct ieee80211_sub_if_data *sdata;
1720
1721         sdata = container_of(work, struct ieee80211_sub_if_data,
1722                              u.mgd.tx_tspec_wk.work);
1723         ieee80211_sta_handle_tspec_ac_params(sdata);
1724 }
1725
1726 /* MLME */
1727 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1728                                      struct ieee80211_sub_if_data *sdata,
1729                                      const u8 *wmm_param, size_t wmm_param_len)
1730 {
1731         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1732         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1733         size_t left;
1734         int count, ac;
1735         const u8 *pos;
1736         u8 uapsd_queues = 0;
1737
1738         if (!local->ops->conf_tx)
1739                 return false;
1740
1741         if (local->hw.queues < IEEE80211_NUM_ACS)
1742                 return false;
1743
1744         if (!wmm_param)
1745                 return false;
1746
1747         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1748                 return false;
1749
1750         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1751                 uapsd_queues = ifmgd->uapsd_queues;
1752
1753         count = wmm_param[6] & 0x0f;
1754         if (count == ifmgd->wmm_last_param_set)
1755                 return false;
1756         ifmgd->wmm_last_param_set = count;
1757
1758         pos = wmm_param + 8;
1759         left = wmm_param_len - 8;
1760
1761         memset(&params, 0, sizeof(params));
1762
1763         sdata->wmm_acm = 0;
1764         for (; left >= 4; left -= 4, pos += 4) {
1765                 int aci = (pos[0] >> 5) & 0x03;
1766                 int acm = (pos[0] >> 4) & 0x01;
1767                 bool uapsd = false;
1768
1769                 switch (aci) {
1770                 case 1: /* AC_BK */
1771                         ac = IEEE80211_AC_BK;
1772                         if (acm)
1773                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1774                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1775                                 uapsd = true;
1776                         break;
1777                 case 2: /* AC_VI */
1778                         ac = IEEE80211_AC_VI;
1779                         if (acm)
1780                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1781                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1782                                 uapsd = true;
1783                         break;
1784                 case 3: /* AC_VO */
1785                         ac = IEEE80211_AC_VO;
1786                         if (acm)
1787                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1788                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1789                                 uapsd = true;
1790                         break;
1791                 case 0: /* AC_BE */
1792                 default:
1793                         ac = IEEE80211_AC_BE;
1794                         if (acm)
1795                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1796                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1797                                 uapsd = true;
1798                         break;
1799                 }
1800
1801                 params[ac].aifs = pos[0] & 0x0f;
1802
1803                 if (params[ac].aifs < 2) {
1804                         sdata_info(sdata,
1805                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1806                                    params[ac].aifs, aci);
1807                         params[ac].aifs = 2;
1808                 }
1809                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1810                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1811                 params[ac].txop = get_unaligned_le16(pos + 2);
1812                 params[ac].acm = acm;
1813                 params[ac].uapsd = uapsd;
1814
1815                 if (params[ac].cw_min > params[ac].cw_max) {
1816                         sdata_info(sdata,
1817                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1818                                    params[ac].cw_min, params[ac].cw_max, aci);
1819                         return false;
1820                 }
1821         }
1822
1823         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1824                 mlme_dbg(sdata,
1825                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1826                          ac, params[ac].acm,
1827                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1828                          params[ac].txop, params[ac].uapsd,
1829                          ifmgd->tx_tspec[ac].downgraded);
1830                 sdata->tx_conf[ac] = params[ac];
1831                 if (!ifmgd->tx_tspec[ac].downgraded &&
1832                     drv_conf_tx(local, sdata, ac, &params[ac]))
1833                         sdata_err(sdata,
1834                                   "failed to set TX queue parameters for AC %d\n",
1835                                   ac);
1836         }
1837
1838         /* enable WMM or activate new settings */
1839         sdata->vif.bss_conf.qos = true;
1840         return true;
1841 }
1842
1843 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1844 {
1845         lockdep_assert_held(&sdata->local->mtx);
1846
1847         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1848         ieee80211_run_deferred_scan(sdata->local);
1849 }
1850
1851 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1852 {
1853         mutex_lock(&sdata->local->mtx);
1854         __ieee80211_stop_poll(sdata);
1855         mutex_unlock(&sdata->local->mtx);
1856 }
1857
1858 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1859                                            u16 capab, bool erp_valid, u8 erp)
1860 {
1861         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1862         u32 changed = 0;
1863         bool use_protection;
1864         bool use_short_preamble;
1865         bool use_short_slot;
1866
1867         if (erp_valid) {
1868                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1869                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1870         } else {
1871                 use_protection = false;
1872                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1873         }
1874
1875         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1876         if (ieee80211_get_sdata_band(sdata) == NL80211_BAND_5GHZ)
1877                 use_short_slot = true;
1878
1879         if (use_protection != bss_conf->use_cts_prot) {
1880                 bss_conf->use_cts_prot = use_protection;
1881                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1882         }
1883
1884         if (use_short_preamble != bss_conf->use_short_preamble) {
1885                 bss_conf->use_short_preamble = use_short_preamble;
1886                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1887         }
1888
1889         if (use_short_slot != bss_conf->use_short_slot) {
1890                 bss_conf->use_short_slot = use_short_slot;
1891                 changed |= BSS_CHANGED_ERP_SLOT;
1892         }
1893
1894         return changed;
1895 }
1896
1897 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1898                                      struct cfg80211_bss *cbss,
1899                                      u32 bss_info_changed)
1900 {
1901         struct ieee80211_bss *bss = (void *)cbss->priv;
1902         struct ieee80211_local *local = sdata->local;
1903         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1904
1905         bss_info_changed |= BSS_CHANGED_ASSOC;
1906         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1907                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1908
1909         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1910                 beacon_loss_count * bss_conf->beacon_int));
1911
1912         sdata->u.mgd.associated = cbss;
1913         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1914
1915         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1916
1917         if (sdata->vif.p2p ||
1918             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1919                 const struct cfg80211_bss_ies *ies;
1920
1921                 rcu_read_lock();
1922                 ies = rcu_dereference(cbss->ies);
1923                 if (ies) {
1924                         int ret;
1925
1926                         ret = cfg80211_get_p2p_attr(
1927                                         ies->data, ies->len,
1928                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1929                                         (u8 *) &bss_conf->p2p_noa_attr,
1930                                         sizeof(bss_conf->p2p_noa_attr));
1931                         if (ret >= 2) {
1932                                 sdata->u.mgd.p2p_noa_index =
1933                                         bss_conf->p2p_noa_attr.index;
1934                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1935                         }
1936                 }
1937                 rcu_read_unlock();
1938         }
1939
1940         /* just to be sure */
1941         ieee80211_stop_poll(sdata);
1942
1943         ieee80211_led_assoc(local, 1);
1944
1945         if (sdata->u.mgd.have_beacon) {
1946                 /*
1947                  * If the AP is buggy we may get here with no DTIM period
1948                  * known, so assume it's 1 which is the only safe assumption
1949                  * in that case, although if the TIM IE is broken powersave
1950                  * probably just won't work at all.
1951                  */
1952                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1953                 bss_conf->beacon_rate = bss->beacon_rate;
1954                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1955         } else {
1956                 bss_conf->beacon_rate = NULL;
1957                 bss_conf->dtim_period = 0;
1958         }
1959
1960         bss_conf->assoc = 1;
1961
1962         /* Tell the driver to monitor connection quality (if supported) */
1963         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1964             bss_conf->cqm_rssi_thold)
1965                 bss_info_changed |= BSS_CHANGED_CQM;
1966
1967         /* Enable ARP filtering */
1968         if (bss_conf->arp_addr_cnt)
1969                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1970
1971         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1972
1973         mutex_lock(&local->iflist_mtx);
1974         ieee80211_recalc_ps(local);
1975         mutex_unlock(&local->iflist_mtx);
1976
1977         ieee80211_recalc_smps(sdata);
1978         ieee80211_recalc_ps_vif(sdata);
1979
1980         netif_carrier_on(sdata->dev);
1981 }
1982
1983 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1984                                    u16 stype, u16 reason, bool tx,
1985                                    u8 *frame_buf)
1986 {
1987         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1988         struct ieee80211_local *local = sdata->local;
1989         u32 changed = 0;
1990
1991         sdata_assert_lock(sdata);
1992
1993         if (WARN_ON_ONCE(tx && !frame_buf))
1994                 return;
1995
1996         if (WARN_ON(!ifmgd->associated))
1997                 return;
1998
1999         ieee80211_stop_poll(sdata);
2000
2001         ifmgd->associated = NULL;
2002         netif_carrier_off(sdata->dev);
2003
2004         /*
2005          * if we want to get out of ps before disassoc (why?) we have
2006          * to do it before sending disassoc, as otherwise the null-packet
2007          * won't be valid.
2008          */
2009         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2010                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2011                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2012         }
2013         local->ps_sdata = NULL;
2014
2015         /* disable per-vif ps */
2016         ieee80211_recalc_ps_vif(sdata);
2017
2018         /* make sure ongoing transmission finishes */
2019         synchronize_net();
2020
2021         /*
2022          * drop any frame before deauth/disassoc, this can be data or
2023          * management frame. Since we are disconnecting, we should not
2024          * insist sending these frames which can take time and delay
2025          * the disconnection and possible the roaming.
2026          */
2027         if (tx)
2028                 ieee80211_flush_queues(local, sdata, true);
2029
2030         /* deauthenticate/disassociate now */
2031         if (tx || frame_buf)
2032                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2033                                                reason, tx, frame_buf);
2034
2035         /* flush out frame - make sure the deauth was actually sent */
2036         if (tx)
2037                 ieee80211_flush_queues(local, sdata, false);
2038
2039         /* clear bssid only after building the needed mgmt frames */
2040         eth_zero_addr(ifmgd->bssid);
2041
2042         /* remove AP and TDLS peers */
2043         sta_info_flush(sdata);
2044
2045         /* finally reset all BSS / config parameters */
2046         changed |= ieee80211_reset_erp_info(sdata);
2047
2048         ieee80211_led_assoc(local, 0);
2049         changed |= BSS_CHANGED_ASSOC;
2050         sdata->vif.bss_conf.assoc = false;
2051
2052         ifmgd->p2p_noa_index = -1;
2053         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2054                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2055
2056         /* on the next assoc, re-program HT/VHT parameters */
2057         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2058         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2059         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2060         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2061
2062         /* reset MU-MIMO ownership and group data */
2063         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2064                sizeof(sdata->vif.bss_conf.mu_group.membership));
2065         memset(sdata->vif.bss_conf.mu_group.position, 0,
2066                sizeof(sdata->vif.bss_conf.mu_group.position));
2067         changed |= BSS_CHANGED_MU_GROUPS;
2068         sdata->vif.mu_mimo_owner = false;
2069
2070         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2071
2072         del_timer_sync(&local->dynamic_ps_timer);
2073         cancel_work_sync(&local->dynamic_ps_enable_work);
2074
2075         /* Disable ARP filtering */
2076         if (sdata->vif.bss_conf.arp_addr_cnt)
2077                 changed |= BSS_CHANGED_ARP_FILTER;
2078
2079         sdata->vif.bss_conf.qos = false;
2080         changed |= BSS_CHANGED_QOS;
2081
2082         /* The BSSID (not really interesting) and HT changed */
2083         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2084         ieee80211_bss_info_change_notify(sdata, changed);
2085
2086         /* disassociated - set to defaults now */
2087         ieee80211_set_wmm_default(sdata, false, false);
2088
2089         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2090         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2091         del_timer_sync(&sdata->u.mgd.timer);
2092         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2093
2094         sdata->vif.bss_conf.dtim_period = 0;
2095         sdata->vif.bss_conf.beacon_rate = NULL;
2096
2097         ifmgd->have_beacon = false;
2098
2099         ifmgd->flags = 0;
2100         mutex_lock(&local->mtx);
2101         ieee80211_vif_release_channel(sdata);
2102
2103         sdata->vif.csa_active = false;
2104         ifmgd->csa_waiting_bcn = false;
2105         ifmgd->csa_ignored_same_chan = false;
2106         if (sdata->csa_block_tx) {
2107                 ieee80211_wake_vif_queues(local, sdata,
2108                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2109                 sdata->csa_block_tx = false;
2110         }
2111         mutex_unlock(&local->mtx);
2112
2113         /* existing TX TSPEC sessions no longer exist */
2114         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2115         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2116
2117         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2118 }
2119
2120 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2121                              struct ieee80211_hdr *hdr)
2122 {
2123         /*
2124          * We can postpone the mgd.timer whenever receiving unicast frames
2125          * from AP because we know that the connection is working both ways
2126          * at that time. But multicast frames (and hence also beacons) must
2127          * be ignored here, because we need to trigger the timer during
2128          * data idle periods for sending the periodic probe request to the
2129          * AP we're connected to.
2130          */
2131         if (is_multicast_ether_addr(hdr->addr1))
2132                 return;
2133
2134         ieee80211_sta_reset_conn_monitor(sdata);
2135 }
2136
2137 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2138 {
2139         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2140         struct ieee80211_local *local = sdata->local;
2141
2142         mutex_lock(&local->mtx);
2143         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2144                 goto out;
2145
2146         __ieee80211_stop_poll(sdata);
2147
2148         mutex_lock(&local->iflist_mtx);
2149         ieee80211_recalc_ps(local);
2150         mutex_unlock(&local->iflist_mtx);
2151
2152         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2153                 goto out;
2154
2155         /*
2156          * We've received a probe response, but are not sure whether
2157          * we have or will be receiving any beacons or data, so let's
2158          * schedule the timers again, just in case.
2159          */
2160         ieee80211_sta_reset_beacon_monitor(sdata);
2161
2162         mod_timer(&ifmgd->conn_mon_timer,
2163                   round_jiffies_up(jiffies +
2164                                    IEEE80211_CONNECTION_IDLE_TIME));
2165 out:
2166         mutex_unlock(&local->mtx);
2167 }
2168
2169 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2170                                            struct ieee80211_hdr *hdr,
2171                                            u16 tx_time)
2172 {
2173         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2174         u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2175         int ac = ieee80211_ac_from_tid(tid);
2176         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2177         unsigned long now = jiffies;
2178
2179         if (likely(!tx_tspec->admitted_time))
2180                 return;
2181
2182         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2183                 tx_tspec->consumed_tx_time = 0;
2184                 tx_tspec->time_slice_start = now;
2185
2186                 if (tx_tspec->downgraded) {
2187                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2188                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2189                 }
2190         }
2191
2192         if (tx_tspec->downgraded)
2193                 return;
2194
2195         tx_tspec->consumed_tx_time += tx_time;
2196
2197         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2198                 tx_tspec->downgraded = true;
2199                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2200                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2201         }
2202 }
2203
2204 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2205                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2206 {
2207         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2208
2209         if (!ieee80211_is_data(hdr->frame_control))
2210             return;
2211
2212         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2213             sdata->u.mgd.probe_send_count > 0) {
2214                 if (ack)
2215                         ieee80211_sta_reset_conn_monitor(sdata);
2216                 else
2217                         sdata->u.mgd.nullfunc_failed = true;
2218                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2219                 return;
2220         }
2221
2222         if (ack)
2223                 ieee80211_sta_reset_conn_monitor(sdata);
2224 }
2225
2226 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2227 {
2228         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2229         const u8 *ssid;
2230         u8 *dst = ifmgd->associated->bssid;
2231         u8 unicast_limit = max(1, max_probe_tries - 3);
2232         struct sta_info *sta;
2233
2234         /*
2235          * Try sending broadcast probe requests for the last three
2236          * probe requests after the first ones failed since some
2237          * buggy APs only support broadcast probe requests.
2238          */
2239         if (ifmgd->probe_send_count >= unicast_limit)
2240                 dst = NULL;
2241
2242         /*
2243          * When the hardware reports an accurate Tx ACK status, it's
2244          * better to send a nullfunc frame instead of a probe request,
2245          * as it will kick us off the AP quickly if we aren't associated
2246          * anymore. The timeout will be reset if the frame is ACKed by
2247          * the AP.
2248          */
2249         ifmgd->probe_send_count++;
2250
2251         if (dst) {
2252                 mutex_lock(&sdata->local->sta_mtx);
2253                 sta = sta_info_get(sdata, dst);
2254                 if (!WARN_ON(!sta))
2255                         ieee80211_check_fast_rx(sta);
2256                 mutex_unlock(&sdata->local->sta_mtx);
2257         }
2258
2259         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2260                 ifmgd->nullfunc_failed = false;
2261                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2262         } else {
2263                 int ssid_len;
2264
2265                 rcu_read_lock();
2266                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2267                 if (WARN_ON_ONCE(ssid == NULL))
2268                         ssid_len = 0;
2269                 else
2270                         ssid_len = ssid[1];
2271
2272                 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2273                                          ssid + 2, ssid_len, NULL,
2274                                          0, (u32) -1, true, 0,
2275                                          ifmgd->associated->channel, false);
2276                 rcu_read_unlock();
2277         }
2278
2279         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2280         run_again(sdata, ifmgd->probe_timeout);
2281 }
2282
2283 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2284                                    bool beacon)
2285 {
2286         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2287         bool already = false;
2288
2289         if (!ieee80211_sdata_running(sdata))
2290                 return;
2291
2292         sdata_lock(sdata);
2293
2294         if (!ifmgd->associated)
2295                 goto out;
2296
2297         mutex_lock(&sdata->local->mtx);
2298
2299         if (sdata->local->tmp_channel || sdata->local->scanning) {
2300                 mutex_unlock(&sdata->local->mtx);
2301                 goto out;
2302         }
2303
2304         if (beacon) {
2305                 mlme_dbg_ratelimited(sdata,
2306                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2307                                      beacon_loss_count);
2308
2309                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2310         }
2311
2312         /*
2313          * The driver/our work has already reported this event or the
2314          * connection monitoring has kicked in and we have already sent
2315          * a probe request. Or maybe the AP died and the driver keeps
2316          * reporting until we disassociate...
2317          *
2318          * In either case we have to ignore the current call to this
2319          * function (except for setting the correct probe reason bit)
2320          * because otherwise we would reset the timer every time and
2321          * never check whether we received a probe response!
2322          */
2323         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2324                 already = true;
2325
2326         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2327
2328         mutex_unlock(&sdata->local->mtx);
2329
2330         if (already)
2331                 goto out;
2332
2333         mutex_lock(&sdata->local->iflist_mtx);
2334         ieee80211_recalc_ps(sdata->local);
2335         mutex_unlock(&sdata->local->iflist_mtx);
2336
2337         ifmgd->probe_send_count = 0;
2338         ieee80211_mgd_probe_ap_send(sdata);
2339  out:
2340         sdata_unlock(sdata);
2341 }
2342
2343 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2344                                           struct ieee80211_vif *vif)
2345 {
2346         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2347         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2348         struct cfg80211_bss *cbss;
2349         struct sk_buff *skb;
2350         const u8 *ssid;
2351         int ssid_len;
2352
2353         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2354                 return NULL;
2355
2356         sdata_assert_lock(sdata);
2357
2358         if (ifmgd->associated)
2359                 cbss = ifmgd->associated;
2360         else if (ifmgd->auth_data)
2361                 cbss = ifmgd->auth_data->bss;
2362         else if (ifmgd->assoc_data)
2363                 cbss = ifmgd->assoc_data->bss;
2364         else
2365                 return NULL;
2366
2367         rcu_read_lock();
2368         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2369         if (WARN_ON_ONCE(ssid == NULL))
2370                 ssid_len = 0;
2371         else
2372                 ssid_len = ssid[1];
2373
2374         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2375                                         (u32) -1, cbss->channel,
2376                                         ssid + 2, ssid_len,
2377                                         NULL, 0, true);
2378         rcu_read_unlock();
2379
2380         return skb;
2381 }
2382 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2383
2384 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2385                                         const u8 *buf, size_t len, bool tx,
2386                                         u16 reason)
2387 {
2388         struct ieee80211_event event = {
2389                 .type = MLME_EVENT,
2390                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2391                 .u.mlme.reason = reason,
2392         };
2393
2394         if (tx)
2395                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2396         else
2397                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2398
2399         drv_event_callback(sdata->local, sdata, &event);
2400 }
2401
2402 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2403 {
2404         struct ieee80211_local *local = sdata->local;
2405         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2406         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2407
2408         sdata_lock(sdata);
2409         if (!ifmgd->associated) {
2410                 sdata_unlock(sdata);
2411                 return;
2412         }
2413
2414         /* AP is probably out of range (or not reachable for another reason) so
2415          * remove the bss struct for that AP.
2416          */
2417         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2418
2419         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2420                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2421                                true, frame_buf);
2422         mutex_lock(&local->mtx);
2423         sdata->vif.csa_active = false;
2424         ifmgd->csa_waiting_bcn = false;
2425         if (sdata->csa_block_tx) {
2426                 ieee80211_wake_vif_queues(local, sdata,
2427                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2428                 sdata->csa_block_tx = false;
2429         }
2430         mutex_unlock(&local->mtx);
2431
2432         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2433                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2434
2435         sdata_unlock(sdata);
2436 }
2437
2438 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2439 {
2440         struct ieee80211_sub_if_data *sdata =
2441                 container_of(work, struct ieee80211_sub_if_data,
2442                              u.mgd.beacon_connection_loss_work);
2443         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2444
2445         if (ifmgd->associated)
2446                 ifmgd->beacon_loss_count++;
2447
2448         if (ifmgd->connection_loss) {
2449                 sdata_info(sdata, "Connection to AP %pM lost\n",
2450                            ifmgd->bssid);
2451                 __ieee80211_disconnect(sdata);
2452         } else {
2453                 ieee80211_mgd_probe_ap(sdata, true);
2454         }
2455 }
2456
2457 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2458 {
2459         struct ieee80211_sub_if_data *sdata =
2460                 container_of(work, struct ieee80211_sub_if_data,
2461                              u.mgd.csa_connection_drop_work);
2462
2463         __ieee80211_disconnect(sdata);
2464 }
2465
2466 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2467 {
2468         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2469         struct ieee80211_hw *hw = &sdata->local->hw;
2470
2471         trace_api_beacon_loss(sdata);
2472
2473         sdata->u.mgd.connection_loss = false;
2474         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2475 }
2476 EXPORT_SYMBOL(ieee80211_beacon_loss);
2477
2478 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2479 {
2480         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2481         struct ieee80211_hw *hw = &sdata->local->hw;
2482
2483         trace_api_connection_loss(sdata);
2484
2485         sdata->u.mgd.connection_loss = true;
2486         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2487 }
2488 EXPORT_SYMBOL(ieee80211_connection_loss);
2489
2490
2491 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2492                                         bool assoc)
2493 {
2494         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2495
2496         sdata_assert_lock(sdata);
2497
2498         if (!assoc) {
2499                 /*
2500                  * we are not authenticated yet, the only timer that could be
2501                  * running is the timeout for the authentication response which
2502                  * which is not relevant anymore.
2503                  */
2504                 del_timer_sync(&sdata->u.mgd.timer);
2505                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2506
2507                 eth_zero_addr(sdata->u.mgd.bssid);
2508                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2509                 sdata->u.mgd.flags = 0;
2510                 mutex_lock(&sdata->local->mtx);
2511                 ieee80211_vif_release_channel(sdata);
2512                 mutex_unlock(&sdata->local->mtx);
2513         }
2514
2515         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2516         kfree(auth_data);
2517         sdata->u.mgd.auth_data = NULL;
2518 }
2519
2520 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2521                                          bool assoc, bool abandon)
2522 {
2523         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2524
2525         sdata_assert_lock(sdata);
2526
2527         if (!assoc) {
2528                 /*
2529                  * we are not associated yet, the only timer that could be
2530                  * running is the timeout for the association response which
2531                  * which is not relevant anymore.
2532                  */
2533                 del_timer_sync(&sdata->u.mgd.timer);
2534                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2535
2536                 eth_zero_addr(sdata->u.mgd.bssid);
2537                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2538                 sdata->u.mgd.flags = 0;
2539                 sdata->vif.mu_mimo_owner = false;
2540
2541                 mutex_lock(&sdata->local->mtx);
2542                 ieee80211_vif_release_channel(sdata);
2543                 mutex_unlock(&sdata->local->mtx);
2544
2545                 if (abandon)
2546                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2547         }
2548
2549         kfree(assoc_data);
2550         sdata->u.mgd.assoc_data = NULL;
2551 }
2552
2553 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2554                                      struct ieee80211_mgmt *mgmt, size_t len)
2555 {
2556         struct ieee80211_local *local = sdata->local;
2557         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2558         u8 *pos;
2559         struct ieee802_11_elems elems;
2560         u32 tx_flags = 0;
2561
2562         pos = mgmt->u.auth.variable;
2563         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2564         if (!elems.challenge)
2565                 return;
2566         auth_data->expected_transaction = 4;
2567         drv_mgd_prepare_tx(sdata->local, sdata);
2568         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2569                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2570                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2571         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2572                             elems.challenge - 2, elems.challenge_len + 2,
2573                             auth_data->bss->bssid, auth_data->bss->bssid,
2574                             auth_data->key, auth_data->key_len,
2575                             auth_data->key_idx, tx_flags);
2576 }
2577
2578 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2579                                    struct ieee80211_mgmt *mgmt, size_t len)
2580 {
2581         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2582         u8 bssid[ETH_ALEN];
2583         u16 auth_alg, auth_transaction, status_code;
2584         struct sta_info *sta;
2585         struct ieee80211_event event = {
2586                 .type = MLME_EVENT,
2587                 .u.mlme.data = AUTH_EVENT,
2588         };
2589
2590         sdata_assert_lock(sdata);
2591
2592         if (len < 24 + 6)
2593                 return;
2594
2595         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2596                 return;
2597
2598         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2599
2600         if (!ether_addr_equal(bssid, mgmt->bssid))
2601                 return;
2602
2603         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2604         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2605         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2606
2607         if (auth_alg != ifmgd->auth_data->algorithm ||
2608             auth_transaction != ifmgd->auth_data->expected_transaction) {
2609                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2610                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2611                            auth_transaction,
2612                            ifmgd->auth_data->expected_transaction);
2613                 return;
2614         }
2615
2616         if (status_code != WLAN_STATUS_SUCCESS) {
2617                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2618                            mgmt->sa, status_code);
2619                 ieee80211_destroy_auth_data(sdata, false);
2620                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2621                 event.u.mlme.status = MLME_DENIED;
2622                 event.u.mlme.reason = status_code;
2623                 drv_event_callback(sdata->local, sdata, &event);
2624                 return;
2625         }
2626
2627         switch (ifmgd->auth_data->algorithm) {
2628         case WLAN_AUTH_OPEN:
2629         case WLAN_AUTH_LEAP:
2630         case WLAN_AUTH_FT:
2631         case WLAN_AUTH_SAE:
2632         case WLAN_AUTH_FILS_SK:
2633         case WLAN_AUTH_FILS_SK_PFS:
2634         case WLAN_AUTH_FILS_PK:
2635                 break;
2636         case WLAN_AUTH_SHARED_KEY:
2637                 if (ifmgd->auth_data->expected_transaction != 4) {
2638                         ieee80211_auth_challenge(sdata, mgmt, len);
2639                         /* need another frame */
2640                         return;
2641                 }
2642                 break;
2643         default:
2644                 WARN_ONCE(1, "invalid auth alg %d",
2645                           ifmgd->auth_data->algorithm);
2646                 return;
2647         }
2648
2649         event.u.mlme.status = MLME_SUCCESS;
2650         drv_event_callback(sdata->local, sdata, &event);
2651         sdata_info(sdata, "authenticated\n");
2652         ifmgd->auth_data->done = true;
2653         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2654         ifmgd->auth_data->timeout_started = true;
2655         run_again(sdata, ifmgd->auth_data->timeout);
2656
2657         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2658             ifmgd->auth_data->expected_transaction != 2) {
2659                 /*
2660                  * Report auth frame to user space for processing since another
2661                  * round of Authentication frames is still needed.
2662                  */
2663                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2664                 return;
2665         }
2666
2667         /* move station state to auth */
2668         mutex_lock(&sdata->local->sta_mtx);
2669         sta = sta_info_get(sdata, bssid);
2670         if (!sta) {
2671                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2672                 goto out_err;
2673         }
2674         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2675                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2676                 goto out_err;
2677         }
2678         mutex_unlock(&sdata->local->sta_mtx);
2679
2680         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2681         return;
2682  out_err:
2683         mutex_unlock(&sdata->local->sta_mtx);
2684         /* ignore frame -- wait for timeout */
2685 }
2686
2687 #define case_WLAN(type) \
2688         case WLAN_REASON_##type: return #type
2689
2690 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2691 {
2692         switch (reason_code) {
2693         case_WLAN(UNSPECIFIED);
2694         case_WLAN(PREV_AUTH_NOT_VALID);
2695         case_WLAN(DEAUTH_LEAVING);
2696         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2697         case_WLAN(DISASSOC_AP_BUSY);
2698         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2699         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2700         case_WLAN(DISASSOC_STA_HAS_LEFT);
2701         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2702         case_WLAN(DISASSOC_BAD_POWER);
2703         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2704         case_WLAN(INVALID_IE);
2705         case_WLAN(MIC_FAILURE);
2706         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2707         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2708         case_WLAN(IE_DIFFERENT);
2709         case_WLAN(INVALID_GROUP_CIPHER);
2710         case_WLAN(INVALID_PAIRWISE_CIPHER);
2711         case_WLAN(INVALID_AKMP);
2712         case_WLAN(UNSUPP_RSN_VERSION);
2713         case_WLAN(INVALID_RSN_IE_CAP);
2714         case_WLAN(IEEE8021X_FAILED);
2715         case_WLAN(CIPHER_SUITE_REJECTED);
2716         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2717         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2718         case_WLAN(DISASSOC_LOW_ACK);
2719         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2720         case_WLAN(QSTA_LEAVE_QBSS);
2721         case_WLAN(QSTA_NOT_USE);
2722         case_WLAN(QSTA_REQUIRE_SETUP);
2723         case_WLAN(QSTA_TIMEOUT);
2724         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2725         case_WLAN(MESH_PEER_CANCELED);
2726         case_WLAN(MESH_MAX_PEERS);
2727         case_WLAN(MESH_CONFIG);
2728         case_WLAN(MESH_CLOSE);
2729         case_WLAN(MESH_MAX_RETRIES);
2730         case_WLAN(MESH_CONFIRM_TIMEOUT);
2731         case_WLAN(MESH_INVALID_GTK);
2732         case_WLAN(MESH_INCONSISTENT_PARAM);
2733         case_WLAN(MESH_INVALID_SECURITY);
2734         case_WLAN(MESH_PATH_ERROR);
2735         case_WLAN(MESH_PATH_NOFORWARD);
2736         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2737         case_WLAN(MAC_EXISTS_IN_MBSS);
2738         case_WLAN(MESH_CHAN_REGULATORY);
2739         case_WLAN(MESH_CHAN);
2740         default: return "<unknown>";
2741         }
2742 }
2743
2744 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2745                                      struct ieee80211_mgmt *mgmt, size_t len)
2746 {
2747         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2748         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2749
2750         sdata_assert_lock(sdata);
2751
2752         if (len < 24 + 2)
2753                 return;
2754
2755         if (ifmgd->associated &&
2756             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2757                 const u8 *bssid = ifmgd->associated->bssid;
2758
2759                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2760                            bssid, reason_code,
2761                            ieee80211_get_reason_code_string(reason_code));
2762
2763                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2764
2765                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2766                                             reason_code);
2767                 return;
2768         }
2769
2770         if (ifmgd->assoc_data &&
2771             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2772                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2773
2774                 sdata_info(sdata,
2775                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2776                            bssid, reason_code,
2777                            ieee80211_get_reason_code_string(reason_code));
2778
2779                 ieee80211_destroy_assoc_data(sdata, false, true);
2780
2781                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2782                 return;
2783         }
2784 }
2785
2786
2787 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2788                                        struct ieee80211_mgmt *mgmt, size_t len)
2789 {
2790         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2791         u16 reason_code;
2792
2793         sdata_assert_lock(sdata);
2794
2795         if (len < 24 + 2)
2796                 return;
2797
2798         if (!ifmgd->associated ||
2799             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2800                 return;
2801
2802         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2803
2804         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2805                    mgmt->sa, reason_code);
2806
2807         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2808
2809         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2810 }
2811
2812 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2813                                 u8 *supp_rates, unsigned int supp_rates_len,
2814                                 u32 *rates, u32 *basic_rates,
2815                                 bool *have_higher_than_11mbit,
2816                                 int *min_rate, int *min_rate_index,
2817                                 int shift, u32 rate_flags)
2818 {
2819         int i, j;
2820
2821         for (i = 0; i < supp_rates_len; i++) {
2822                 int rate = supp_rates[i] & 0x7f;
2823                 bool is_basic = !!(supp_rates[i] & 0x80);
2824
2825                 if ((rate * 5 * (1 << shift)) > 110)
2826                         *have_higher_than_11mbit = true;
2827
2828                 /*
2829                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2830                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2831                  *
2832                  * Note: Even through the membership selector and the basic
2833                  *       rate flag share the same bit, they are not exactly
2834                  *       the same.
2835                  */
2836                 if (!!(supp_rates[i] & 0x80) &&
2837                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2838                         continue;
2839
2840                 for (j = 0; j < sband->n_bitrates; j++) {
2841                         struct ieee80211_rate *br;
2842                         int brate;
2843
2844                         br = &sband->bitrates[j];
2845                         if ((rate_flags & br->flags) != rate_flags)
2846                                 continue;
2847
2848                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2849                         if (brate == rate) {
2850                                 *rates |= BIT(j);
2851                                 if (is_basic)
2852                                         *basic_rates |= BIT(j);
2853                                 if ((rate * 5) < *min_rate) {
2854                                         *min_rate = rate * 5;
2855                                         *min_rate_index = j;
2856                                 }
2857                                 break;
2858                         }
2859                 }
2860         }
2861 }
2862
2863 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2864                                     struct cfg80211_bss *cbss,
2865                                     struct ieee80211_mgmt *mgmt, size_t len)
2866 {
2867         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2868         struct ieee80211_local *local = sdata->local;
2869         struct ieee80211_supported_band *sband;
2870         struct sta_info *sta;
2871         u8 *pos;
2872         u16 capab_info, aid;
2873         struct ieee802_11_elems elems;
2874         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2875         const struct cfg80211_bss_ies *bss_ies = NULL;
2876         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2877         u32 changed = 0;
2878         int err;
2879         bool ret;
2880
2881         /* AssocResp and ReassocResp have identical structure */
2882
2883         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2884         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2885
2886         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2887                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2888                            aid);
2889         aid &= ~(BIT(15) | BIT(14));
2890
2891         ifmgd->broken_ap = false;
2892
2893         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2894                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2895                            aid);
2896                 aid = 0;
2897                 ifmgd->broken_ap = true;
2898         }
2899
2900         pos = mgmt->u.assoc_resp.variable;
2901         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2902
2903         if (!elems.supp_rates) {
2904                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2905                 return false;
2906         }
2907
2908         ifmgd->aid = aid;
2909         ifmgd->tdls_chan_switch_prohibited =
2910                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2911                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2912
2913         /*
2914          * Some APs are erroneously not including some information in their
2915          * (re)association response frames. Try to recover by using the data
2916          * from the beacon or probe response. This seems to afflict mobile
2917          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2918          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2919          */
2920         if ((assoc_data->wmm && !elems.wmm_param) ||
2921             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2922              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2923             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2924              (!elems.vht_cap_elem || !elems.vht_operation))) {
2925                 const struct cfg80211_bss_ies *ies;
2926                 struct ieee802_11_elems bss_elems;
2927
2928                 rcu_read_lock();
2929                 ies = rcu_dereference(cbss->ies);
2930                 if (ies)
2931                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2932                                           GFP_ATOMIC);
2933                 rcu_read_unlock();
2934                 if (!bss_ies)
2935                         return false;
2936
2937                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2938                                        false, &bss_elems);
2939                 if (assoc_data->wmm &&
2940                     !elems.wmm_param && bss_elems.wmm_param) {
2941                         elems.wmm_param = bss_elems.wmm_param;
2942                         sdata_info(sdata,
2943                                    "AP bug: WMM param missing from AssocResp\n");
2944                 }
2945
2946                 /*
2947                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2948                  * have to include the IEs in the (re)association response.
2949                  */
2950                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2951                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2952                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2953                         sdata_info(sdata,
2954                                    "AP bug: HT capability missing from AssocResp\n");
2955                 }
2956                 if (!elems.ht_operation && bss_elems.ht_operation &&
2957                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2958                         elems.ht_operation = bss_elems.ht_operation;
2959                         sdata_info(sdata,
2960                                    "AP bug: HT operation missing from AssocResp\n");
2961                 }
2962                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2963                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2964                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2965                         sdata_info(sdata,
2966                                    "AP bug: VHT capa missing from AssocResp\n");
2967                 }
2968                 if (!elems.vht_operation && bss_elems.vht_operation &&
2969                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2970                         elems.vht_operation = bss_elems.vht_operation;
2971                         sdata_info(sdata,
2972                                    "AP bug: VHT operation missing from AssocResp\n");
2973                 }
2974         }
2975
2976         /*
2977          * We previously checked these in the beacon/probe response, so
2978          * they should be present here. This is just a safety net.
2979          */
2980         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2981             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2982                 sdata_info(sdata,
2983                            "HT AP is missing WMM params or HT capability/operation\n");
2984                 ret = false;
2985                 goto out;
2986         }
2987
2988         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2989             (!elems.vht_cap_elem || !elems.vht_operation)) {
2990                 sdata_info(sdata,
2991                            "VHT AP is missing VHT capability/operation\n");
2992                 ret = false;
2993                 goto out;
2994         }
2995
2996         mutex_lock(&sdata->local->sta_mtx);
2997         /*
2998          * station info was already allocated and inserted before
2999          * the association and should be available to us
3000          */
3001         sta = sta_info_get(sdata, cbss->bssid);
3002         if (WARN_ON(!sta)) {
3003                 mutex_unlock(&sdata->local->sta_mtx);
3004                 ret = false;
3005                 goto out;
3006         }
3007
3008         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
3009
3010         /* Set up internal HT/VHT capabilities */
3011         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3012                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3013                                                   elems.ht_cap_elem, sta);
3014
3015         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3016                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3017                                                     elems.vht_cap_elem, sta);
3018
3019         /*
3020          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3021          * in their association response, so ignore that data for our own
3022          * configuration. If it changed since the last beacon, we'll get the
3023          * next beacon and update then.
3024          */
3025
3026         /*
3027          * If an operating mode notification IE is present, override the
3028          * NSS calculation (that would be done in rate_control_rate_init())
3029          * and use the # of streams from that element.
3030          */
3031         if (elems.opmode_notif &&
3032             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3033                 u8 nss;
3034
3035                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3036                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3037                 nss += 1;
3038                 sta->sta.rx_nss = nss;
3039         }
3040
3041         rate_control_rate_init(sta);
3042
3043         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3044                 set_sta_flag(sta, WLAN_STA_MFP);
3045                 sta->sta.mfp = true;
3046         } else {
3047                 sta->sta.mfp = false;
3048         }
3049
3050         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3051
3052         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3053         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3054                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3055         if (err) {
3056                 sdata_info(sdata,
3057                            "failed to move station %pM to desired state\n",
3058                            sta->sta.addr);
3059                 WARN_ON(__sta_info_destroy(sta));
3060                 mutex_unlock(&sdata->local->sta_mtx);
3061                 ret = false;
3062                 goto out;
3063         }
3064
3065         mutex_unlock(&sdata->local->sta_mtx);
3066
3067         /*
3068          * Always handle WMM once after association regardless
3069          * of the first value the AP uses. Setting -1 here has
3070          * that effect because the AP values is an unsigned
3071          * 4-bit value.
3072          */
3073         ifmgd->wmm_last_param_set = -1;
3074
3075         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3076                 ieee80211_set_wmm_default(sdata, false, false);
3077         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3078                                              elems.wmm_param_len)) {
3079                 /* still enable QoS since we might have HT/VHT */
3080                 ieee80211_set_wmm_default(sdata, false, true);
3081                 /* set the disable-WMM flag in this case to disable
3082                  * tracking WMM parameter changes in the beacon if
3083                  * the parameters weren't actually valid. Doing so
3084                  * avoids changing parameters very strangely when
3085                  * the AP is going back and forth between valid and
3086                  * invalid parameters.
3087                  */
3088                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3089         }
3090         changed |= BSS_CHANGED_QOS;
3091
3092         /* set AID and assoc capability,
3093          * ieee80211_set_associated() will tell the driver */
3094         bss_conf->aid = aid;
3095         bss_conf->assoc_capability = capab_info;
3096         ieee80211_set_associated(sdata, cbss, changed);
3097
3098         /*
3099          * If we're using 4-addr mode, let the AP know that we're
3100          * doing so, so that it can create the STA VLAN on its side
3101          */
3102         if (ifmgd->use_4addr)
3103                 ieee80211_send_4addr_nullfunc(local, sdata);
3104
3105         /*
3106          * Start timer to probe the connection to the AP now.
3107          * Also start the timer that will detect beacon loss.
3108          */
3109         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3110         ieee80211_sta_reset_beacon_monitor(sdata);
3111
3112         ret = true;
3113  out:
3114         kfree(bss_ies);
3115         return ret;
3116 }
3117
3118 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3119                                          struct ieee80211_mgmt *mgmt,
3120                                          size_t len)
3121 {
3122         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3123         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3124         u16 capab_info, status_code, aid;
3125         struct ieee802_11_elems elems;
3126         int ac, uapsd_queues = -1;
3127         u8 *pos;
3128         bool reassoc;
3129         struct cfg80211_bss *bss;
3130         struct ieee80211_event event = {
3131                 .type = MLME_EVENT,
3132                 .u.mlme.data = ASSOC_EVENT,
3133         };
3134
3135         sdata_assert_lock(sdata);
3136
3137         if (!assoc_data)
3138                 return;
3139         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3140                 return;
3141
3142         /*
3143          * AssocResp and ReassocResp have identical structure, so process both
3144          * of them in this function.
3145          */
3146
3147         if (len < 24 + 6)
3148                 return;
3149
3150         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3151         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3152         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3153         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3154
3155         sdata_info(sdata,
3156                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3157                    reassoc ? "Rea" : "A", mgmt->sa,
3158                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3159
3160         if (assoc_data->fils_kek_len &&
3161             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3162                 return;
3163
3164         pos = mgmt->u.assoc_resp.variable;
3165         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3166
3167         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3168             elems.timeout_int &&
3169             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3170                 u32 tu, ms;
3171                 tu = le32_to_cpu(elems.timeout_int->value);
3172                 ms = tu * 1024 / 1000;
3173                 sdata_info(sdata,
3174                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3175                            mgmt->sa, tu, ms);
3176                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3177                 assoc_data->timeout_started = true;
3178                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3179                         run_again(sdata, assoc_data->timeout);
3180                 return;
3181         }
3182
3183         bss = assoc_data->bss;
3184
3185         if (status_code != WLAN_STATUS_SUCCESS) {
3186                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3187                            mgmt->sa, status_code);
3188                 ieee80211_destroy_assoc_data(sdata, false, false);
3189                 event.u.mlme.status = MLME_DENIED;
3190                 event.u.mlme.reason = status_code;
3191                 drv_event_callback(sdata->local, sdata, &event);
3192         } else {
3193                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3194                         /* oops -- internal error -- send timeout for now */
3195                         ieee80211_destroy_assoc_data(sdata, false, false);
3196                         cfg80211_assoc_timeout(sdata->dev, bss);
3197                         return;
3198                 }
3199                 event.u.mlme.status = MLME_SUCCESS;
3200                 drv_event_callback(sdata->local, sdata, &event);
3201                 sdata_info(sdata, "associated\n");
3202
3203                 /*
3204                  * destroy assoc_data afterwards, as otherwise an idle
3205                  * recalc after assoc_data is NULL but before associated
3206                  * is set can cause the interface to go idle
3207                  */
3208                 ieee80211_destroy_assoc_data(sdata, true, false);
3209
3210                 /* get uapsd queues configuration */
3211                 uapsd_queues = 0;
3212                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3213                         if (sdata->tx_conf[ac].uapsd)
3214                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3215         }
3216
3217         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3218 }
3219
3220 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3221                                   struct ieee80211_mgmt *mgmt, size_t len,
3222                                   struct ieee80211_rx_status *rx_status,
3223                                   struct ieee802_11_elems *elems)
3224 {
3225         struct ieee80211_local *local = sdata->local;
3226         struct ieee80211_bss *bss;
3227         struct ieee80211_channel *channel;
3228
3229         sdata_assert_lock(sdata);
3230
3231         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3232         if (!channel)
3233                 return;
3234
3235         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3236                                         channel);
3237         if (bss) {
3238                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3239                 ieee80211_rx_bss_put(local, bss);
3240         }
3241 }
3242
3243
3244 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3245                                          struct sk_buff *skb)
3246 {
3247         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3248         struct ieee80211_if_managed *ifmgd;
3249         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3250         size_t baselen, len = skb->len;
3251         struct ieee802_11_elems elems;
3252
3253         ifmgd = &sdata->u.mgd;
3254
3255         sdata_assert_lock(sdata);
3256
3257         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3258                 return; /* ignore ProbeResp to foreign address */
3259
3260         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3261         if (baselen > len)
3262                 return;
3263
3264         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3265                                false, &elems);
3266
3267         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3268
3269         if (ifmgd->associated &&
3270             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3271                 ieee80211_reset_ap_probe(sdata);
3272 }
3273
3274 /*
3275  * This is the canonical list of information elements we care about,
3276  * the filter code also gives us all changes to the Microsoft OUI
3277  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3278  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3279  * changes to requested client power.
3280  *
3281  * We implement beacon filtering in software since that means we can
3282  * avoid processing the frame here and in cfg80211, and userspace
3283  * will not be able to tell whether the hardware supports it or not.
3284  *
3285  * XXX: This list needs to be dynamic -- userspace needs to be able to
3286  *      add items it requires. It also needs to be able to tell us to
3287  *      look out for other vendor IEs.
3288  */
3289 static const u64 care_about_ies =
3290         (1ULL << WLAN_EID_COUNTRY) |
3291         (1ULL << WLAN_EID_ERP_INFO) |
3292         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3293         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3294         (1ULL << WLAN_EID_HT_CAPABILITY) |
3295         (1ULL << WLAN_EID_HT_OPERATION) |
3296         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3297
3298 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3299                                      struct ieee80211_mgmt *mgmt, size_t len,
3300                                      struct ieee80211_rx_status *rx_status)
3301 {
3302         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3303         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3304         size_t baselen;
3305         struct ieee802_11_elems elems;
3306         struct ieee80211_local *local = sdata->local;
3307         struct ieee80211_chanctx_conf *chanctx_conf;
3308         struct ieee80211_channel *chan;
3309         struct sta_info *sta;
3310         u32 changed = 0;
3311         bool erp_valid;
3312         u8 erp_value = 0;
3313         u32 ncrc;
3314         u8 *bssid;
3315         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3316
3317         sdata_assert_lock(sdata);
3318
3319         /* Process beacon from the current BSS */
3320         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3321         if (baselen > len)
3322                 return;
3323
3324         rcu_read_lock();
3325         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3326         if (!chanctx_conf) {
3327                 rcu_read_unlock();
3328                 return;
3329         }
3330
3331         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3332                 rcu_read_unlock();
3333                 return;
3334         }
3335         chan = chanctx_conf->def.chan;
3336         rcu_read_unlock();
3337
3338         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3339             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3340                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3341                                        len - baselen, false, &elems);
3342
3343                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3344                 if (elems.tim && !elems.parse_error) {
3345                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3346                         ifmgd->dtim_period = tim_ie->dtim_period;
3347                 }
3348                 ifmgd->have_beacon = true;
3349                 ifmgd->assoc_data->need_beacon = false;
3350                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3351                         sdata->vif.bss_conf.sync_tsf =
3352                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3353                         sdata->vif.bss_conf.sync_device_ts =
3354                                 rx_status->device_timestamp;
3355                         if (elems.tim)
3356                                 sdata->vif.bss_conf.sync_dtim_count =
3357                                         elems.tim->dtim_count;
3358                         else
3359                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3360                 }
3361                 /* continue assoc process */
3362                 ifmgd->assoc_data->timeout = jiffies;
3363                 ifmgd->assoc_data->timeout_started = true;
3364                 run_again(sdata, ifmgd->assoc_data->timeout);
3365                 return;
3366         }
3367
3368         if (!ifmgd->associated ||
3369             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3370                 return;
3371         bssid = ifmgd->associated->bssid;
3372
3373         /* Track average RSSI from the Beacon frames of the current AP */
3374         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3375                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3376                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3377                 ifmgd->last_cqm_event_signal = 0;
3378                 ifmgd->count_beacon_signal = 1;
3379                 ifmgd->last_ave_beacon_signal = 0;
3380         } else {
3381                 ifmgd->count_beacon_signal++;
3382         }
3383
3384         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3385
3386         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3387             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3388                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3389                 int last_sig = ifmgd->last_ave_beacon_signal;
3390                 struct ieee80211_event event = {
3391                         .type = RSSI_EVENT,
3392                 };
3393
3394                 /*
3395                  * if signal crosses either of the boundaries, invoke callback
3396                  * with appropriate parameters
3397                  */
3398                 if (sig > ifmgd->rssi_max_thold &&
3399                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3400                         ifmgd->last_ave_beacon_signal = sig;
3401                         event.u.rssi.data = RSSI_EVENT_HIGH;
3402                         drv_event_callback(local, sdata, &event);
3403                 } else if (sig < ifmgd->rssi_min_thold &&
3404                            (last_sig >= ifmgd->rssi_max_thold ||
3405                            last_sig == 0)) {
3406                         ifmgd->last_ave_beacon_signal = sig;
3407                         event.u.rssi.data = RSSI_EVENT_LOW;
3408                         drv_event_callback(local, sdata, &event);
3409                 }
3410         }
3411
3412         if (bss_conf->cqm_rssi_thold &&
3413             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3414             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3415                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3416                 int last_event = ifmgd->last_cqm_event_signal;
3417                 int thold = bss_conf->cqm_rssi_thold;
3418                 int hyst = bss_conf->cqm_rssi_hyst;
3419
3420                 if (sig < thold &&
3421                     (last_event == 0 || sig < last_event - hyst)) {
3422                         ifmgd->last_cqm_event_signal = sig;
3423                         ieee80211_cqm_rssi_notify(
3424                                 &sdata->vif,
3425                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3426                                 GFP_KERNEL);
3427                 } else if (sig > thold &&
3428                            (last_event == 0 || sig > last_event + hyst)) {
3429                         ifmgd->last_cqm_event_signal = sig;
3430                         ieee80211_cqm_rssi_notify(
3431                                 &sdata->vif,
3432                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3433                                 GFP_KERNEL);
3434                 }
3435         }
3436
3437         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3438                 mlme_dbg_ratelimited(sdata,
3439                                      "cancelling AP probe due to a received beacon\n");
3440                 ieee80211_reset_ap_probe(sdata);
3441         }
3442
3443         /*
3444          * Push the beacon loss detection into the future since
3445          * we are processing a beacon from the AP just now.
3446          */
3447         ieee80211_sta_reset_beacon_monitor(sdata);
3448
3449         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3450         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3451                                           len - baselen, false, &elems,
3452                                           care_about_ies, ncrc);
3453
3454         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3455             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3456                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3457                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3458                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3459                                 ieee80211_hw_config(local,
3460                                                     IEEE80211_CONF_CHANGE_PS);
3461                         }
3462                         ieee80211_send_nullfunc(local, sdata, false);
3463                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3464                         local->pspolling = true;
3465
3466                         /*
3467                          * Here is assumed that the driver will be
3468                          * able to send ps-poll frame and receive a
3469                          * response even though power save mode is
3470                          * enabled, but some drivers might require
3471                          * to disable power save here. This needs
3472                          * to be investigated.
3473                          */
3474                         ieee80211_send_pspoll(local, sdata);
3475                 }
3476         }
3477
3478         if (sdata->vif.p2p ||
3479             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3480                 struct ieee80211_p2p_noa_attr noa = {};
3481                 int ret;
3482
3483                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3484                                             len - baselen,
3485                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3486                                             (u8 *) &noa, sizeof(noa));
3487                 if (ret >= 2) {
3488                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3489                                 /* valid noa_attr and index changed */
3490                                 sdata->u.mgd.p2p_noa_index = noa.index;
3491                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3492                                 changed |= BSS_CHANGED_P2P_PS;
3493                                 /*
3494                                  * make sure we update all information, the CRC
3495                                  * mechanism doesn't look at P2P attributes.
3496                                  */
3497                                 ifmgd->beacon_crc_valid = false;
3498                         }
3499                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3500                         /* noa_attr not found and we had valid noa_attr before */
3501                         sdata->u.mgd.p2p_noa_index = -1;
3502                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3503                         changed |= BSS_CHANGED_P2P_PS;
3504                         ifmgd->beacon_crc_valid = false;
3505                 }
3506         }
3507
3508         if (ifmgd->csa_waiting_bcn)
3509                 ieee80211_chswitch_post_beacon(sdata);
3510
3511         /*
3512          * Update beacon timing and dtim count on every beacon appearance. This
3513          * will allow the driver to use the most updated values. Do it before
3514          * comparing this one with last received beacon.
3515          * IMPORTANT: These parameters would possibly be out of sync by the time
3516          * the driver will use them. The synchronized view is currently
3517          * guaranteed only in certain callbacks.
3518          */
3519         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3520                 sdata->vif.bss_conf.sync_tsf =
3521                         le64_to_cpu(mgmt->u.beacon.timestamp);
3522                 sdata->vif.bss_conf.sync_device_ts =
3523                         rx_status->device_timestamp;
3524                 if (elems.tim)
3525                         sdata->vif.bss_conf.sync_dtim_count =
3526                                 elems.tim->dtim_count;
3527                 else
3528                         sdata->vif.bss_conf.sync_dtim_count = 0;
3529         }
3530
3531         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3532                 return;
3533         ifmgd->beacon_crc = ncrc;
3534         ifmgd->beacon_crc_valid = true;
3535
3536         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3537
3538         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3539                                          rx_status->device_timestamp,
3540                                          &elems, true);
3541
3542         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3543             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3544                                      elems.wmm_param_len))
3545                 changed |= BSS_CHANGED_QOS;
3546
3547         /*
3548          * If we haven't had a beacon before, tell the driver about the
3549          * DTIM period (and beacon timing if desired) now.
3550          */
3551         if (!ifmgd->have_beacon) {
3552                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3553                 if (elems.tim)
3554                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3555                 else
3556                         bss_conf->dtim_period = 1;
3557
3558                 changed |= BSS_CHANGED_BEACON_INFO;
3559                 ifmgd->have_beacon = true;
3560
3561                 mutex_lock(&local->iflist_mtx);
3562                 ieee80211_recalc_ps(local);
3563                 mutex_unlock(&local->iflist_mtx);
3564
3565                 ieee80211_recalc_ps_vif(sdata);
3566         }
3567
3568         if (elems.erp_info) {
3569                 erp_valid = true;
3570                 erp_value = elems.erp_info[0];
3571         } else {
3572                 erp_valid = false;
3573         }
3574         changed |= ieee80211_handle_bss_capability(sdata,
3575                         le16_to_cpu(mgmt->u.beacon.capab_info),
3576                         erp_valid, erp_value);
3577
3578         mutex_lock(&local->sta_mtx);
3579         sta = sta_info_get(sdata, bssid);
3580
3581         if (ieee80211_config_bw(sdata, sta,
3582                                 elems.ht_cap_elem, elems.ht_operation,
3583                                 elems.vht_operation, bssid, &changed)) {
3584                 mutex_unlock(&local->sta_mtx);
3585                 sdata_info(sdata,
3586                            "failed to follow AP %pM bandwidth change, disconnect\n",
3587                            bssid);
3588                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3589                                        WLAN_REASON_DEAUTH_LEAVING,
3590                                        true, deauth_buf);
3591                 ieee80211_report_disconnect(sdata, deauth_buf,
3592                                             sizeof(deauth_buf), true,
3593                                             WLAN_REASON_DEAUTH_LEAVING);
3594                 return;
3595         }
3596
3597         if (sta && elems.opmode_notif)
3598                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3599                                             rx_status->band);
3600         mutex_unlock(&local->sta_mtx);
3601
3602         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3603                                                elems.country_elem,
3604                                                elems.country_elem_len,
3605                                                elems.pwr_constr_elem,
3606                                                elems.cisco_dtpc_elem);
3607
3608         ieee80211_bss_info_change_notify(sdata, changed);
3609 }
3610
3611 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3612                                   struct sk_buff *skb)
3613 {
3614         struct ieee80211_rx_status *rx_status;
3615         struct ieee80211_mgmt *mgmt;
3616         u16 fc;
3617         struct ieee802_11_elems elems;
3618         int ies_len;
3619
3620         rx_status = (struct ieee80211_rx_status *) skb->cb;
3621         mgmt = (struct ieee80211_mgmt *) skb->data;
3622         fc = le16_to_cpu(mgmt->frame_control);
3623
3624         sdata_lock(sdata);
3625
3626         switch (fc & IEEE80211_FCTL_STYPE) {
3627         case IEEE80211_STYPE_BEACON:
3628                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3629                 break;
3630         case IEEE80211_STYPE_PROBE_RESP:
3631                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3632                 break;
3633         case IEEE80211_STYPE_AUTH:
3634                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3635                 break;
3636         case IEEE80211_STYPE_DEAUTH:
3637                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3638                 break;
3639         case IEEE80211_STYPE_DISASSOC:
3640                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3641                 break;
3642         case IEEE80211_STYPE_ASSOC_RESP:
3643         case IEEE80211_STYPE_REASSOC_RESP:
3644                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3645                 break;
3646         case IEEE80211_STYPE_ACTION:
3647                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3648                         ies_len = skb->len -
3649                                   offsetof(struct ieee80211_mgmt,
3650                                            u.action.u.chan_switch.variable);
3651
3652                         if (ies_len < 0)
3653                                 break;
3654
3655                         ieee802_11_parse_elems(
3656                                 mgmt->u.action.u.chan_switch.variable,
3657                                 ies_len, true, &elems);
3658
3659                         if (elems.parse_error)
3660                                 break;
3661
3662                         ieee80211_sta_process_chanswitch(sdata,
3663                                                  rx_status->mactime,
3664                                                  rx_status->device_timestamp,
3665                                                  &elems, false);
3666                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3667                         ies_len = skb->len -
3668                                   offsetof(struct ieee80211_mgmt,
3669                                            u.action.u.ext_chan_switch.variable);
3670
3671                         if (ies_len < 0)
3672                                 break;
3673
3674                         ieee802_11_parse_elems(
3675                                 mgmt->u.action.u.ext_chan_switch.variable,
3676                                 ies_len, true, &elems);
3677
3678                         if (elems.parse_error)
3679                                 break;
3680
3681                         /* for the handling code pretend this was also an IE */
3682                         elems.ext_chansw_ie =
3683                                 &mgmt->u.action.u.ext_chan_switch.data;
3684
3685                         ieee80211_sta_process_chanswitch(sdata,
3686                                                  rx_status->mactime,
3687                                                  rx_status->device_timestamp,
3688                                                  &elems, false);
3689                 }
3690                 break;
3691         }
3692         sdata_unlock(sdata);
3693 }
3694
3695 static void ieee80211_sta_timer(unsigned long data)
3696 {
3697         struct ieee80211_sub_if_data *sdata =
3698                 (struct ieee80211_sub_if_data *) data;
3699
3700         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3701 }
3702
3703 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3704                                           u8 *bssid, u8 reason, bool tx)
3705 {
3706         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3707
3708         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3709                                tx, frame_buf);
3710
3711         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3712                                     reason);
3713 }
3714
3715 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3716 {
3717         struct ieee80211_local *local = sdata->local;
3718         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3719         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3720         u32 tx_flags = 0;
3721         u16 trans = 1;
3722         u16 status = 0;
3723
3724         sdata_assert_lock(sdata);
3725
3726         if (WARN_ON_ONCE(!auth_data))
3727                 return -EINVAL;
3728
3729         auth_data->tries++;
3730
3731         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3732                 sdata_info(sdata, "authentication with %pM timed out\n",
3733                            auth_data->bss->bssid);
3734
3735                 /*
3736                  * Most likely AP is not in the range so remove the
3737                  * bss struct for that AP.
3738                  */
3739                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3740
3741                 return -ETIMEDOUT;
3742         }
3743
3744         drv_mgd_prepare_tx(local, sdata);
3745
3746         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3747                    auth_data->bss->bssid, auth_data->tries,
3748                    IEEE80211_AUTH_MAX_TRIES);
3749
3750         auth_data->expected_transaction = 2;
3751
3752         if (auth_data->algorithm == WLAN_AUTH_SAE) {
3753                 trans = auth_data->sae_trans;
3754                 status = auth_data->sae_status;
3755                 auth_data->expected_transaction = trans;
3756         }
3757
3758         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3759                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3760                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3761
3762         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3763                             auth_data->data, auth_data->data_len,
3764                             auth_data->bss->bssid,
3765                             auth_data->bss->bssid, NULL, 0, 0,
3766                             tx_flags);
3767
3768         if (tx_flags == 0) {
3769                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3770                 auth_data->timeout_started = true;
3771                 run_again(sdata, auth_data->timeout);
3772         } else {
3773                 auth_data->timeout =
3774                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3775                 auth_data->timeout_started = true;
3776                 run_again(sdata, auth_data->timeout);
3777         }
3778
3779         return 0;
3780 }
3781
3782 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3783 {
3784         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3785         struct ieee80211_local *local = sdata->local;
3786
3787         sdata_assert_lock(sdata);
3788
3789         assoc_data->tries++;
3790         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3791                 sdata_info(sdata, "association with %pM timed out\n",
3792                            assoc_data->bss->bssid);
3793
3794                 /*
3795                  * Most likely AP is not in the range so remove the
3796                  * bss struct for that AP.
3797                  */
3798                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3799
3800                 return -ETIMEDOUT;
3801         }
3802
3803         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3804                    assoc_data->bss->bssid, assoc_data->tries,
3805                    IEEE80211_ASSOC_MAX_TRIES);
3806         ieee80211_send_assoc(sdata);
3807
3808         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3809                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3810                 assoc_data->timeout_started = true;
3811                 run_again(sdata, assoc_data->timeout);
3812         } else {
3813                 assoc_data->timeout =
3814                         round_jiffies_up(jiffies +
3815                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3816                 assoc_data->timeout_started = true;
3817                 run_again(sdata, assoc_data->timeout);
3818         }
3819
3820         return 0;
3821 }
3822
3823 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3824                                   __le16 fc, bool acked)
3825 {
3826         struct ieee80211_local *local = sdata->local;
3827
3828         sdata->u.mgd.status_fc = fc;
3829         sdata->u.mgd.status_acked = acked;
3830         sdata->u.mgd.status_received = true;
3831
3832         ieee80211_queue_work(&local->hw, &sdata->work);
3833 }
3834
3835 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3836 {
3837         struct ieee80211_local *local = sdata->local;
3838         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3839
3840         sdata_lock(sdata);
3841
3842         if (ifmgd->status_received) {
3843                 __le16 fc = ifmgd->status_fc;
3844                 bool status_acked = ifmgd->status_acked;
3845
3846                 ifmgd->status_received = false;
3847                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3848                         if (status_acked) {
3849                                 ifmgd->auth_data->timeout =
3850                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3851                                 run_again(sdata, ifmgd->auth_data->timeout);
3852                         } else {
3853                                 ifmgd->auth_data->timeout = jiffies - 1;
3854                         }
3855                         ifmgd->auth_data->timeout_started = true;
3856                 } else if (ifmgd->assoc_data &&
3857                            (ieee80211_is_assoc_req(fc) ||
3858                             ieee80211_is_reassoc_req(fc))) {
3859                         if (status_acked) {
3860                                 ifmgd->assoc_data->timeout =
3861                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3862                                 run_again(sdata, ifmgd->assoc_data->timeout);
3863                         } else {
3864                                 ifmgd->assoc_data->timeout = jiffies - 1;
3865                         }
3866                         ifmgd->assoc_data->timeout_started = true;
3867                 }
3868         }
3869
3870         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3871             time_after(jiffies, ifmgd->auth_data->timeout)) {
3872                 if (ifmgd->auth_data->done) {
3873                         /*
3874                          * ok ... we waited for assoc but userspace didn't,
3875                          * so let's just kill the auth data
3876                          */
3877                         ieee80211_destroy_auth_data(sdata, false);
3878                 } else if (ieee80211_auth(sdata)) {
3879                         u8 bssid[ETH_ALEN];
3880                         struct ieee80211_event event = {
3881                                 .type = MLME_EVENT,
3882                                 .u.mlme.data = AUTH_EVENT,
3883                                 .u.mlme.status = MLME_TIMEOUT,
3884                         };
3885
3886                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3887
3888                         ieee80211_destroy_auth_data(sdata, false);
3889
3890                         cfg80211_auth_timeout(sdata->dev, bssid);
3891                         drv_event_callback(sdata->local, sdata, &event);
3892                 }
3893         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3894                 run_again(sdata, ifmgd->auth_data->timeout);
3895
3896         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3897             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3898                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3899                     ieee80211_do_assoc(sdata)) {
3900                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3901                         struct ieee80211_event event = {
3902                                 .type = MLME_EVENT,
3903                                 .u.mlme.data = ASSOC_EVENT,
3904                                 .u.mlme.status = MLME_TIMEOUT,
3905                         };
3906
3907                         ieee80211_destroy_assoc_data(sdata, false, false);
3908                         cfg80211_assoc_timeout(sdata->dev, bss);
3909                         drv_event_callback(sdata->local, sdata, &event);
3910                 }
3911         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3912                 run_again(sdata, ifmgd->assoc_data->timeout);
3913
3914         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3915             ifmgd->associated) {
3916                 u8 bssid[ETH_ALEN];
3917                 int max_tries;
3918
3919                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3920
3921                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3922                         max_tries = max_nullfunc_tries;
3923                 else
3924                         max_tries = max_probe_tries;
3925
3926                 /* ACK received for nullfunc probing frame */
3927                 if (!ifmgd->probe_send_count)
3928                         ieee80211_reset_ap_probe(sdata);
3929                 else if (ifmgd->nullfunc_failed) {
3930                         if (ifmgd->probe_send_count < max_tries) {
3931                                 mlme_dbg(sdata,
3932                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3933                                          bssid, ifmgd->probe_send_count,
3934                                          max_tries);
3935                                 ieee80211_mgd_probe_ap_send(sdata);
3936                         } else {
3937                                 mlme_dbg(sdata,
3938                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3939                                          bssid);
3940                                 ieee80211_sta_connection_lost(sdata, bssid,
3941                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3942                                         false);
3943                         }
3944                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3945                         run_again(sdata, ifmgd->probe_timeout);
3946                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3947                         mlme_dbg(sdata,
3948                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3949                                  bssid, probe_wait_ms);
3950                         ieee80211_sta_connection_lost(sdata, bssid,
3951                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3952                 } else if (ifmgd->probe_send_count < max_tries) {
3953                         mlme_dbg(sdata,
3954                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3955                                  bssid, probe_wait_ms,
3956                                  ifmgd->probe_send_count, max_tries);
3957                         ieee80211_mgd_probe_ap_send(sdata);
3958                 } else {
3959                         /*
3960                          * We actually lost the connection ... or did we?
3961                          * Let's make sure!
3962                          */
3963                         mlme_dbg(sdata,
3964                                  "No probe response from AP %pM after %dms, disconnecting.\n",
3965                                  bssid, probe_wait_ms);
3966
3967                         ieee80211_sta_connection_lost(sdata, bssid,
3968                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3969                 }
3970         }
3971
3972         sdata_unlock(sdata);
3973 }
3974
3975 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3976 {
3977         struct ieee80211_sub_if_data *sdata =
3978                 (struct ieee80211_sub_if_data *) data;
3979         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3980
3981         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3982                 return;
3983
3984         sdata->u.mgd.connection_loss = false;
3985         ieee80211_queue_work(&sdata->local->hw,
3986                              &sdata->u.mgd.beacon_connection_loss_work);
3987 }
3988
3989 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3990 {
3991         struct ieee80211_sub_if_data *sdata =
3992                 (struct ieee80211_sub_if_data *) data;
3993         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3994         struct ieee80211_local *local = sdata->local;
3995
3996         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3997                 return;
3998
3999         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4000 }
4001
4002 static void ieee80211_sta_monitor_work(struct work_struct *work)
4003 {
4004         struct ieee80211_sub_if_data *sdata =
4005                 container_of(work, struct ieee80211_sub_if_data,
4006                              u.mgd.monitor_work);
4007
4008         ieee80211_mgd_probe_ap(sdata, false);
4009 }
4010
4011 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4012 {
4013         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4014                 __ieee80211_stop_poll(sdata);
4015
4016                 /* let's probe the connection once */
4017                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4018                         ieee80211_queue_work(&sdata->local->hw,
4019                                              &sdata->u.mgd.monitor_work);
4020         }
4021 }
4022
4023 #ifdef CONFIG_PM
4024 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4025 {
4026         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4027         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4028
4029         sdata_lock(sdata);
4030
4031         if (ifmgd->auth_data || ifmgd->assoc_data) {
4032                 const u8 *bssid = ifmgd->auth_data ?
4033                                 ifmgd->auth_data->bss->bssid :
4034                                 ifmgd->assoc_data->bss->bssid;
4035
4036                 /*
4037                  * If we are trying to authenticate / associate while suspending,
4038                  * cfg80211 won't know and won't actually abort those attempts,
4039                  * thus we need to do that ourselves.
4040                  */
4041                 ieee80211_send_deauth_disassoc(sdata, bssid,
4042                                                IEEE80211_STYPE_DEAUTH,
4043                                                WLAN_REASON_DEAUTH_LEAVING,
4044                                                false, frame_buf);
4045                 if (ifmgd->assoc_data)
4046                         ieee80211_destroy_assoc_data(sdata, false, true);
4047                 if (ifmgd->auth_data)
4048                         ieee80211_destroy_auth_data(sdata, false);
4049                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4050                                       IEEE80211_DEAUTH_FRAME_LEN);
4051         }
4052
4053         /* This is a bit of a hack - we should find a better and more generic
4054          * solution to this. Normally when suspending, cfg80211 will in fact
4055          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4056          * auth (not so important) or assoc (this is the problem) process.
4057          *
4058          * As a consequence, it can happen that we are in the process of both
4059          * associating and suspending, and receive an association response
4060          * after cfg80211 has checked if it needs to disconnect, but before
4061          * we actually set the flag to drop incoming frames. This will then
4062          * cause the workqueue flush to process the association response in
4063          * the suspend, resulting in a successful association just before it
4064          * tries to remove the interface from the driver, which now though
4065          * has a channel context assigned ... this results in issues.
4066          *
4067          * To work around this (for now) simply deauth here again if we're
4068          * now connected.
4069          */
4070         if (ifmgd->associated && !sdata->local->wowlan) {
4071                 u8 bssid[ETH_ALEN];
4072                 struct cfg80211_deauth_request req = {
4073                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4074                         .bssid = bssid,
4075                 };
4076
4077                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4078                 ieee80211_mgd_deauth(sdata, &req);
4079         }
4080
4081         sdata_unlock(sdata);
4082 }
4083
4084 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4085 {
4086         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4087
4088         sdata_lock(sdata);
4089         if (!ifmgd->associated) {
4090                 sdata_unlock(sdata);
4091                 return;
4092         }
4093
4094         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4095                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4096                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4097                 ieee80211_sta_connection_lost(sdata,
4098                                               ifmgd->associated->bssid,
4099                                               WLAN_REASON_UNSPECIFIED,
4100                                               true);
4101                 sdata_unlock(sdata);
4102                 return;
4103         }
4104         sdata_unlock(sdata);
4105 }
4106 #endif
4107
4108 /* interface setup */
4109 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4110 {
4111         struct ieee80211_if_managed *ifmgd;
4112
4113         ifmgd = &sdata->u.mgd;
4114         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4115         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4116         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4117                   ieee80211_beacon_connection_loss_work);
4118         INIT_WORK(&ifmgd->csa_connection_drop_work,
4119                   ieee80211_csa_connection_drop_work);
4120         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4121         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4122                           ieee80211_tdls_peer_del_work);
4123         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4124                     (unsigned long) sdata);
4125         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4126                     (unsigned long) sdata);
4127         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4128                     (unsigned long) sdata);
4129         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4130                     (unsigned long) sdata);
4131         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4132                           ieee80211_sta_handle_tspec_ac_params_wk);
4133
4134         ifmgd->flags = 0;
4135         ifmgd->powersave = sdata->wdev.ps;
4136         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4137         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4138         ifmgd->p2p_noa_index = -1;
4139
4140         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4141                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4142         else
4143                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4144
4145         /* Setup TDLS data */
4146         spin_lock_init(&ifmgd->teardown_lock);
4147         ifmgd->teardown_skb = NULL;
4148         ifmgd->orig_teardown_skb = NULL;
4149 }
4150
4151 /* scan finished notification */
4152 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4153 {
4154         struct ieee80211_sub_if_data *sdata;
4155
4156         /* Restart STA timers */
4157         rcu_read_lock();
4158         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4159                 if (ieee80211_sdata_running(sdata))
4160                         ieee80211_restart_sta_timer(sdata);
4161         }
4162         rcu_read_unlock();
4163 }
4164
4165 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4166                                      struct cfg80211_bss *cbss)
4167 {
4168         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4169         const u8 *ht_cap_ie, *vht_cap_ie;
4170         const struct ieee80211_ht_cap *ht_cap;
4171         const struct ieee80211_vht_cap *vht_cap;
4172         u8 chains = 1;
4173
4174         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4175                 return chains;
4176
4177         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4178         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4179                 ht_cap = (void *)(ht_cap_ie + 2);
4180                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4181                 /*
4182                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4183                  *       "Tx Unequal Modulation Supported" fields.
4184                  */
4185         }
4186
4187         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4188                 return chains;
4189
4190         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4191         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4192                 u8 nss;
4193                 u16 tx_mcs_map;
4194
4195                 vht_cap = (void *)(vht_cap_ie + 2);
4196                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4197                 for (nss = 8; nss > 0; nss--) {
4198                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4199                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4200                                 break;
4201                 }
4202                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4203                 chains = max(chains, nss);
4204         }
4205
4206         return chains;
4207 }
4208
4209 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4210                                   struct cfg80211_bss *cbss)
4211 {
4212         struct ieee80211_local *local = sdata->local;
4213         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4214         const struct ieee80211_ht_cap *ht_cap = NULL;
4215         const struct ieee80211_ht_operation *ht_oper = NULL;
4216         const struct ieee80211_vht_operation *vht_oper = NULL;
4217         struct ieee80211_supported_band *sband;
4218         struct cfg80211_chan_def chandef;
4219         int ret;
4220         u32 i;
4221         bool have_80mhz;
4222
4223         sband = local->hw.wiphy->bands[cbss->channel->band];
4224
4225         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4226                           IEEE80211_STA_DISABLE_80P80MHZ |
4227                           IEEE80211_STA_DISABLE_160MHZ);
4228
4229         rcu_read_lock();
4230
4231         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4232             sband->ht_cap.ht_supported) {
4233                 const u8 *ht_oper_ie, *ht_cap_ie;
4234
4235                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4236                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4237                         ht_oper = (void *)(ht_oper_ie + 2);
4238
4239                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4240                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4241                         ht_cap = (void *)(ht_cap_ie + 2);
4242
4243                 if (!ht_cap) {
4244                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4245                         ht_oper = NULL;
4246                 }
4247         }
4248
4249         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4250             sband->vht_cap.vht_supported) {
4251                 const u8 *vht_oper_ie, *vht_cap;
4252
4253                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4254                                                    WLAN_EID_VHT_OPERATION);
4255                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4256                         vht_oper = (void *)(vht_oper_ie + 2);
4257                 if (vht_oper && !ht_oper) {
4258                         vht_oper = NULL;
4259                         sdata_info(sdata,
4260                                    "AP advertised VHT without HT, disabling both\n");
4261                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4262                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4263                 }
4264
4265                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4266                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4267                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4268                         vht_oper = NULL;
4269                 }
4270         }
4271
4272         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4273         have_80mhz = false;
4274         for (i = 0; i < sband->n_channels; i++) {
4275                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4276                                                 IEEE80211_CHAN_NO_80MHZ))
4277                         continue;
4278
4279                 have_80mhz = true;
4280                 break;
4281         }
4282
4283         if (!have_80mhz)
4284                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4285
4286         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4287                                                      cbss->channel,
4288                                                      ht_cap, ht_oper, vht_oper,
4289                                                      &chandef, false);
4290
4291         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4292                                       local->rx_chains);
4293
4294         rcu_read_unlock();
4295
4296         /* will change later if needed */
4297         sdata->smps_mode = IEEE80211_SMPS_OFF;
4298
4299         mutex_lock(&local->mtx);
4300         /*
4301          * If this fails (possibly due to channel context sharing
4302          * on incompatible channels, e.g. 80+80 and 160 sharing the
4303          * same control channel) try to use a smaller bandwidth.
4304          */
4305         ret = ieee80211_vif_use_channel(sdata, &chandef,
4306                                         IEEE80211_CHANCTX_SHARED);
4307
4308         /* don't downgrade for 5 and 10 MHz channels, though. */
4309         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4310             chandef.width == NL80211_CHAN_WIDTH_10)
4311                 goto out;
4312
4313         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4314                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4315                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4316                                                 IEEE80211_CHANCTX_SHARED);
4317         }
4318  out:
4319         mutex_unlock(&local->mtx);
4320         return ret;
4321 }
4322
4323 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4324                                      struct cfg80211_bss *cbss, bool assoc,
4325                                      bool override)
4326 {
4327         struct ieee80211_local *local = sdata->local;
4328         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4329         struct ieee80211_bss *bss = (void *)cbss->priv;
4330         struct sta_info *new_sta = NULL;
4331         struct ieee80211_supported_band *sband;
4332         bool have_sta = false;
4333         int err;
4334
4335         sband = local->hw.wiphy->bands[cbss->channel->band];
4336
4337         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4338                 return -EINVAL;
4339
4340         if (assoc) {
4341                 rcu_read_lock();
4342                 have_sta = sta_info_get(sdata, cbss->bssid);
4343                 rcu_read_unlock();
4344         }
4345
4346         if (!have_sta) {
4347                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4348                 if (!new_sta)
4349                         return -ENOMEM;
4350         }
4351
4352         if (new_sta || override) {
4353                 err = ieee80211_prep_channel(sdata, cbss);
4354                 if (err) {
4355                         if (new_sta)
4356                                 sta_info_free(local, new_sta);
4357                         return -EINVAL;
4358                 }
4359         }
4360
4361         if (new_sta) {
4362                 u32 rates = 0, basic_rates = 0;
4363                 bool have_higher_than_11mbit;
4364                 int min_rate = INT_MAX, min_rate_index = -1;
4365                 struct ieee80211_chanctx_conf *chanctx_conf;
4366                 const struct cfg80211_bss_ies *ies;
4367                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4368                 u32 rate_flags;
4369
4370                 rcu_read_lock();
4371                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4372                 if (WARN_ON(!chanctx_conf)) {
4373                         rcu_read_unlock();
4374                         sta_info_free(local, new_sta);
4375                         return -EINVAL;
4376                 }
4377                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4378                 rcu_read_unlock();
4379
4380                 ieee80211_get_rates(sband, bss->supp_rates,
4381                                     bss->supp_rates_len,
4382                                     &rates, &basic_rates,
4383                                     &have_higher_than_11mbit,
4384                                     &min_rate, &min_rate_index,
4385                                     shift, rate_flags);
4386
4387                 /*
4388                  * This used to be a workaround for basic rates missing
4389                  * in the association response frame. Now that we no
4390                  * longer use the basic rates from there, it probably
4391                  * doesn't happen any more, but keep the workaround so
4392                  * in case some *other* APs are buggy in different ways
4393                  * we can connect -- with a warning.
4394                  */
4395                 if (!basic_rates && min_rate_index >= 0) {
4396                         sdata_info(sdata,
4397                                    "No basic rates, using min rate instead\n");
4398                         basic_rates = BIT(min_rate_index);
4399                 }
4400
4401                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4402                 sdata->vif.bss_conf.basic_rates = basic_rates;
4403
4404                 /* cf. IEEE 802.11 9.2.12 */
4405                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4406                     have_higher_than_11mbit)
4407                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4408                 else
4409                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4410
4411                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4412
4413                 /* set timing information */
4414                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4415                 rcu_read_lock();
4416                 ies = rcu_dereference(cbss->beacon_ies);
4417                 if (ies) {
4418                         const u8 *tim_ie;
4419
4420                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4421                         sdata->vif.bss_conf.sync_device_ts =
4422                                 bss->device_ts_beacon;
4423                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4424                                                   ies->data, ies->len);
4425                         if (tim_ie && tim_ie[1] >= 2)
4426                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4427                         else
4428                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4429                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4430                                                TIMING_BEACON_ONLY)) {
4431                         ies = rcu_dereference(cbss->proberesp_ies);
4432                         /* must be non-NULL since beacon IEs were NULL */
4433                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4434                         sdata->vif.bss_conf.sync_device_ts =
4435                                 bss->device_ts_presp;
4436                         sdata->vif.bss_conf.sync_dtim_count = 0;
4437                 } else {
4438                         sdata->vif.bss_conf.sync_tsf = 0;
4439                         sdata->vif.bss_conf.sync_device_ts = 0;
4440                         sdata->vif.bss_conf.sync_dtim_count = 0;
4441                 }
4442                 rcu_read_unlock();
4443
4444                 /* tell driver about BSSID, basic rates and timing */
4445                 ieee80211_bss_info_change_notify(sdata,
4446                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4447                         BSS_CHANGED_BEACON_INT);
4448
4449                 if (assoc)
4450                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4451
4452                 err = sta_info_insert(new_sta);
4453                 new_sta = NULL;
4454                 if (err) {
4455                         sdata_info(sdata,
4456                                    "failed to insert STA entry for the AP (error %d)\n",
4457                                    err);
4458                         return err;
4459                 }
4460         } else
4461                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4462
4463         /* Cancel scan to ensure that nothing interferes with connection */
4464         if (local->scanning)
4465                 ieee80211_scan_cancel(local);
4466
4467         return 0;
4468 }
4469
4470 /* config hooks */
4471 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4472                        struct cfg80211_auth_request *req)
4473 {
4474         struct ieee80211_local *local = sdata->local;
4475         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4476         struct ieee80211_mgd_auth_data *auth_data;
4477         u16 auth_alg;
4478         int err;
4479
4480         /* prepare auth data structure */
4481
4482         switch (req->auth_type) {
4483         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4484                 auth_alg = WLAN_AUTH_OPEN;
4485                 break;
4486         case NL80211_AUTHTYPE_SHARED_KEY:
4487                 if (IS_ERR(local->wep_tx_tfm))
4488                         return -EOPNOTSUPP;
4489                 auth_alg = WLAN_AUTH_SHARED_KEY;
4490                 break;
4491         case NL80211_AUTHTYPE_FT:
4492                 auth_alg = WLAN_AUTH_FT;
4493                 break;
4494         case NL80211_AUTHTYPE_NETWORK_EAP:
4495                 auth_alg = WLAN_AUTH_LEAP;
4496                 break;
4497         case NL80211_AUTHTYPE_SAE:
4498                 auth_alg = WLAN_AUTH_SAE;
4499                 break;
4500         case NL80211_AUTHTYPE_FILS_SK:
4501                 auth_alg = WLAN_AUTH_FILS_SK;
4502                 break;
4503         case NL80211_AUTHTYPE_FILS_SK_PFS:
4504                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4505                 break;
4506         case NL80211_AUTHTYPE_FILS_PK:
4507                 auth_alg = WLAN_AUTH_FILS_PK;
4508                 break;
4509         default:
4510                 return -EOPNOTSUPP;
4511         }
4512
4513         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4514                             req->ie_len, GFP_KERNEL);
4515         if (!auth_data)
4516                 return -ENOMEM;
4517
4518         auth_data->bss = req->bss;
4519
4520         if (req->auth_data_len >= 4) {
4521                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4522                         __le16 *pos = (__le16 *) req->auth_data;
4523
4524                         auth_data->sae_trans = le16_to_cpu(pos[0]);
4525                         auth_data->sae_status = le16_to_cpu(pos[1]);
4526                 }
4527                 memcpy(auth_data->data, req->auth_data + 4,
4528                        req->auth_data_len - 4);
4529                 auth_data->data_len += req->auth_data_len - 4;
4530         }
4531
4532         if (req->ie && req->ie_len) {
4533                 memcpy(&auth_data->data[auth_data->data_len],
4534                        req->ie, req->ie_len);
4535                 auth_data->data_len += req->ie_len;
4536         }
4537
4538         if (req->key && req->key_len) {
4539                 auth_data->key_len = req->key_len;
4540                 auth_data->key_idx = req->key_idx;
4541                 memcpy(auth_data->key, req->key, req->key_len);
4542         }
4543
4544         auth_data->algorithm = auth_alg;
4545
4546         /* try to authenticate/probe */
4547
4548         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4549             ifmgd->assoc_data) {
4550                 err = -EBUSY;
4551                 goto err_free;
4552         }
4553
4554         if (ifmgd->auth_data)
4555                 ieee80211_destroy_auth_data(sdata, false);
4556
4557         /* prep auth_data so we don't go into idle on disassoc */
4558         ifmgd->auth_data = auth_data;
4559
4560         if (ifmgd->associated) {
4561                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4562
4563                 sdata_info(sdata,
4564                            "disconnect from AP %pM for new auth to %pM\n",
4565                            ifmgd->associated->bssid, req->bss->bssid);
4566                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4567                                        WLAN_REASON_UNSPECIFIED,
4568                                        false, frame_buf);
4569
4570                 ieee80211_report_disconnect(sdata, frame_buf,
4571                                             sizeof(frame_buf), true,
4572                                             WLAN_REASON_UNSPECIFIED);
4573         }
4574
4575         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4576
4577         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4578         if (err)
4579                 goto err_clear;
4580
4581         err = ieee80211_auth(sdata);
4582         if (err) {
4583                 sta_info_destroy_addr(sdata, req->bss->bssid);
4584                 goto err_clear;
4585         }
4586
4587         /* hold our own reference */
4588         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4589         return 0;
4590
4591  err_clear:
4592         eth_zero_addr(ifmgd->bssid);
4593         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4594         ifmgd->auth_data = NULL;
4595         mutex_lock(&sdata->local->mtx);
4596         ieee80211_vif_release_channel(sdata);
4597         mutex_unlock(&sdata->local->mtx);
4598  err_free:
4599         kfree(auth_data);
4600         return err;
4601 }
4602
4603 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4604                         struct cfg80211_assoc_request *req)
4605 {
4606         struct ieee80211_local *local = sdata->local;
4607         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4608         struct ieee80211_bss *bss = (void *)req->bss->priv;
4609         struct ieee80211_mgd_assoc_data *assoc_data;
4610         const struct cfg80211_bss_ies *beacon_ies;
4611         struct ieee80211_supported_band *sband;
4612         const u8 *ssidie, *ht_ie, *vht_ie;
4613         int i, err;
4614         bool override = false;
4615
4616         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4617         if (!assoc_data)
4618                 return -ENOMEM;
4619
4620         rcu_read_lock();
4621         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4622         if (!ssidie) {
4623                 rcu_read_unlock();
4624                 kfree(assoc_data);
4625                 return -EINVAL;
4626         }
4627         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4628         assoc_data->ssid_len = ssidie[1];
4629         rcu_read_unlock();
4630
4631         if (ifmgd->associated) {
4632                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4633
4634                 sdata_info(sdata,
4635                            "disconnect from AP %pM for new assoc to %pM\n",
4636                            ifmgd->associated->bssid, req->bss->bssid);
4637                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4638                                        WLAN_REASON_UNSPECIFIED,
4639                                        false, frame_buf);
4640
4641                 ieee80211_report_disconnect(sdata, frame_buf,
4642                                             sizeof(frame_buf), true,
4643                                             WLAN_REASON_UNSPECIFIED);
4644         }
4645
4646         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4647                 err = -EBUSY;
4648                 goto err_free;
4649         }
4650
4651         if (ifmgd->assoc_data) {
4652                 err = -EBUSY;
4653                 goto err_free;
4654         }
4655
4656         if (ifmgd->auth_data) {
4657                 bool match;
4658
4659                 /* keep sta info, bssid if matching */
4660                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4661                 ieee80211_destroy_auth_data(sdata, match);
4662         }
4663
4664         /* prepare assoc data */
4665
4666         ifmgd->beacon_crc_valid = false;
4667
4668         assoc_data->wmm = bss->wmm_used &&
4669                           (local->hw.queues >= IEEE80211_NUM_ACS);
4670
4671         /*
4672          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4673          * We still associate in non-HT mode (11a/b/g) if any one of these
4674          * ciphers is configured as pairwise.
4675          * We can set this to true for non-11n hardware, that'll be checked
4676          * separately along with the peer capabilities.
4677          */
4678         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4679                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4680                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4681                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4682                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4683                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4684                         netdev_info(sdata->dev,
4685                                     "disabling HT/VHT due to WEP/TKIP use\n");
4686                 }
4687         }
4688
4689         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4690         sband = local->hw.wiphy->bands[req->bss->channel->band];
4691         if (!sband->ht_cap.ht_supported ||
4692             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4693             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4694                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4695                 if (!bss->wmm_used &&
4696                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4697                         netdev_info(sdata->dev,
4698                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4699         }
4700
4701         /* disable VHT if we don't support it or the AP doesn't use WMM */
4702         if (!sband->vht_cap.vht_supported ||
4703             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4704             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4705                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4706                 if (!bss->wmm_used &&
4707                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4708                         netdev_info(sdata->dev,
4709                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4710         }
4711
4712         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4713         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4714                sizeof(ifmgd->ht_capa_mask));
4715
4716         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4717         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4718                sizeof(ifmgd->vht_capa_mask));
4719
4720         if (req->ie && req->ie_len) {
4721                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4722                 assoc_data->ie_len = req->ie_len;
4723         }
4724
4725         if (req->fils_kek) {
4726                 /* should already be checked in cfg80211 - so warn */
4727                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4728                         err = -EINVAL;
4729                         goto err_free;
4730                 }
4731                 memcpy(assoc_data->fils_kek, req->fils_kek,
4732                        req->fils_kek_len);
4733                 assoc_data->fils_kek_len = req->fils_kek_len;
4734         }
4735
4736         if (req->fils_nonces)
4737                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4738                        2 * FILS_NONCE_LEN);
4739
4740         assoc_data->bss = req->bss;
4741
4742         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4743                 if (ifmgd->powersave)
4744                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4745                 else
4746                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4747         } else
4748                 sdata->smps_mode = ifmgd->req_smps;
4749
4750         assoc_data->capability = req->bss->capability;
4751         assoc_data->supp_rates = bss->supp_rates;
4752         assoc_data->supp_rates_len = bss->supp_rates_len;
4753
4754         rcu_read_lock();
4755         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4756         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4757                 assoc_data->ap_ht_param =
4758                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4759         else
4760                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4761         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4762         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4763                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4764                        sizeof(struct ieee80211_vht_cap));
4765         else
4766                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4767         rcu_read_unlock();
4768
4769         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4770                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4771              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4772                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4773
4774         if (bss->wmm_used && bss->uapsd_supported &&
4775             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4776                 assoc_data->uapsd = true;
4777                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4778         } else {
4779                 assoc_data->uapsd = false;
4780                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4781         }
4782
4783         if (req->prev_bssid)
4784                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4785
4786         if (req->use_mfp) {
4787                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4788                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4789         } else {
4790                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4791                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4792         }
4793
4794         if (req->flags & ASSOC_REQ_USE_RRM)
4795                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4796         else
4797                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4798
4799         if (req->crypto.control_port)
4800                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4801         else
4802                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4803
4804         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4805         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4806         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4807                                                         sdata->vif.type);
4808
4809         /* kick off associate process */
4810
4811         ifmgd->assoc_data = assoc_data;
4812         ifmgd->dtim_period = 0;
4813         ifmgd->have_beacon = false;
4814
4815         /* override HT/VHT configuration only if the AP and we support it */
4816         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4817                 struct ieee80211_sta_ht_cap sta_ht_cap;
4818
4819                 if (req->flags & ASSOC_REQ_DISABLE_HT)
4820                         override = true;
4821
4822                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4823                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4824
4825                 /* check for 40 MHz disable override */
4826                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4827                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4828                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4829                         override = true;
4830
4831                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4832                     req->flags & ASSOC_REQ_DISABLE_VHT)
4833                         override = true;
4834         }
4835
4836         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4837                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4838                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4839         }
4840
4841         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4842                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4843
4844         err = ieee80211_prep_connection(sdata, req->bss, true, override);
4845         if (err)
4846                 goto err_clear;
4847
4848         rcu_read_lock();
4849         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4850
4851         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4852             !beacon_ies) {
4853                 /*
4854                  * Wait up to one beacon interval ...
4855                  * should this be more if we miss one?
4856                  */
4857                 sdata_info(sdata, "waiting for beacon from %pM\n",
4858                            ifmgd->bssid);
4859                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4860                 assoc_data->timeout_started = true;
4861                 assoc_data->need_beacon = true;
4862         } else if (beacon_ies) {
4863                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4864                                                     beacon_ies->data,
4865                                                     beacon_ies->len);
4866                 u8 dtim_count = 0;
4867
4868                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4869                         const struct ieee80211_tim_ie *tim;
4870                         tim = (void *)(tim_ie + 2);
4871                         ifmgd->dtim_period = tim->dtim_period;
4872                         dtim_count = tim->dtim_count;
4873                 }
4874                 ifmgd->have_beacon = true;
4875                 assoc_data->timeout = jiffies;
4876                 assoc_data->timeout_started = true;
4877
4878                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4879                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4880                         sdata->vif.bss_conf.sync_device_ts =
4881                                 bss->device_ts_beacon;
4882                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4883                 }
4884         } else {
4885                 assoc_data->timeout = jiffies;
4886                 assoc_data->timeout_started = true;
4887         }
4888         rcu_read_unlock();
4889
4890         run_again(sdata, assoc_data->timeout);
4891
4892         if (bss->corrupt_data) {
4893                 char *corrupt_type = "data";
4894                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4895                         if (bss->corrupt_data &
4896                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4897                                 corrupt_type = "beacon and probe response";
4898                         else
4899                                 corrupt_type = "beacon";
4900                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4901                         corrupt_type = "probe response";
4902                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4903                            corrupt_type);
4904         }
4905
4906         return 0;
4907  err_clear:
4908         eth_zero_addr(ifmgd->bssid);
4909         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4910         ifmgd->assoc_data = NULL;
4911  err_free:
4912         kfree(assoc_data);
4913         return err;
4914 }
4915
4916 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4917                          struct cfg80211_deauth_request *req)
4918 {
4919         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4920         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4921         bool tx = !req->local_state_change;
4922
4923         if (ifmgd->auth_data &&
4924             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4925                 sdata_info(sdata,
4926                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4927                            req->bssid, req->reason_code,
4928                            ieee80211_get_reason_code_string(req->reason_code));
4929
4930                 drv_mgd_prepare_tx(sdata->local, sdata);
4931                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4932                                                IEEE80211_STYPE_DEAUTH,
4933                                                req->reason_code, tx,
4934                                                frame_buf);
4935                 ieee80211_destroy_auth_data(sdata, false);
4936                 ieee80211_report_disconnect(sdata, frame_buf,
4937                                             sizeof(frame_buf), true,
4938                                             req->reason_code);
4939
4940                 return 0;
4941         }
4942
4943         if (ifmgd->assoc_data &&
4944             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4945                 sdata_info(sdata,
4946                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
4947                            req->bssid, req->reason_code,
4948                            ieee80211_get_reason_code_string(req->reason_code));
4949
4950                 drv_mgd_prepare_tx(sdata->local, sdata);
4951                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4952                                                IEEE80211_STYPE_DEAUTH,
4953                                                req->reason_code, tx,
4954                                                frame_buf);
4955                 ieee80211_destroy_assoc_data(sdata, false, true);
4956                 ieee80211_report_disconnect(sdata, frame_buf,
4957                                             sizeof(frame_buf), true,
4958                                             req->reason_code);
4959                 return 0;
4960         }
4961
4962         if (ifmgd->associated &&
4963             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4964                 sdata_info(sdata,
4965                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4966                            req->bssid, req->reason_code,
4967                            ieee80211_get_reason_code_string(req->reason_code));
4968
4969                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4970                                        req->reason_code, tx, frame_buf);
4971                 ieee80211_report_disconnect(sdata, frame_buf,
4972                                             sizeof(frame_buf), true,
4973                                             req->reason_code);
4974                 return 0;
4975         }
4976
4977         return -ENOTCONN;
4978 }
4979
4980 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4981                            struct cfg80211_disassoc_request *req)
4982 {
4983         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4984         u8 bssid[ETH_ALEN];
4985         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4986
4987         /*
4988          * cfg80211 should catch this ... but it's racy since
4989          * we can receive a disassoc frame, process it, hand it
4990          * to cfg80211 while that's in a locked section already
4991          * trying to tell us that the user wants to disconnect.
4992          */
4993         if (ifmgd->associated != req->bss)
4994                 return -ENOLINK;
4995
4996         sdata_info(sdata,
4997                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
4998                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4999
5000         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5001         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5002                                req->reason_code, !req->local_state_change,
5003                                frame_buf);
5004
5005         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5006                                     req->reason_code);
5007
5008         return 0;
5009 }
5010
5011 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5012 {
5013         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5014
5015         /*
5016          * Make sure some work items will not run after this,
5017          * they will not do anything but might not have been
5018          * cancelled when disconnecting.
5019          */
5020         cancel_work_sync(&ifmgd->monitor_work);
5021         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5022         cancel_work_sync(&ifmgd->request_smps_work);
5023         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5024         cancel_work_sync(&ifmgd->chswitch_work);
5025         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5026
5027         sdata_lock(sdata);
5028         if (ifmgd->assoc_data) {
5029                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5030                 ieee80211_destroy_assoc_data(sdata, false, false);
5031                 cfg80211_assoc_timeout(sdata->dev, bss);
5032         }
5033         if (ifmgd->auth_data)
5034                 ieee80211_destroy_auth_data(sdata, false);
5035         spin_lock_bh(&ifmgd->teardown_lock);
5036         if (ifmgd->teardown_skb) {
5037                 kfree_skb(ifmgd->teardown_skb);
5038                 ifmgd->teardown_skb = NULL;
5039                 ifmgd->orig_teardown_skb = NULL;
5040         }
5041         spin_unlock_bh(&ifmgd->teardown_lock);
5042         del_timer_sync(&ifmgd->timer);
5043         sdata_unlock(sdata);
5044 }
5045
5046 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5047                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5048                                gfp_t gfp)
5049 {
5050         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5051
5052         trace_api_cqm_rssi_notify(sdata, rssi_event);
5053
5054         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5055 }
5056 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5057
5058 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5059 {
5060         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5061
5062         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5063
5064         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5065 }
5066 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);