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)
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
2546         kfree(assoc_data);
2547         sdata->u.mgd.assoc_data = NULL;
2548 }
2549
2550 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2551                                      struct ieee80211_mgmt *mgmt, size_t len)
2552 {
2553         struct ieee80211_local *local = sdata->local;
2554         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2555         u8 *pos;
2556         struct ieee802_11_elems elems;
2557         u32 tx_flags = 0;
2558
2559         pos = mgmt->u.auth.variable;
2560         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2561         if (!elems.challenge)
2562                 return;
2563         auth_data->expected_transaction = 4;
2564         drv_mgd_prepare_tx(sdata->local, sdata);
2565         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2566                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2567                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2568         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2569                             elems.challenge - 2, elems.challenge_len + 2,
2570                             auth_data->bss->bssid, auth_data->bss->bssid,
2571                             auth_data->key, auth_data->key_len,
2572                             auth_data->key_idx, tx_flags);
2573 }
2574
2575 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2576                                    struct ieee80211_mgmt *mgmt, size_t len)
2577 {
2578         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2579         u8 bssid[ETH_ALEN];
2580         u16 auth_alg, auth_transaction, status_code;
2581         struct sta_info *sta;
2582         struct ieee80211_event event = {
2583                 .type = MLME_EVENT,
2584                 .u.mlme.data = AUTH_EVENT,
2585         };
2586
2587         sdata_assert_lock(sdata);
2588
2589         if (len < 24 + 6)
2590                 return;
2591
2592         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2593                 return;
2594
2595         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2596
2597         if (!ether_addr_equal(bssid, mgmt->bssid))
2598                 return;
2599
2600         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2601         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2602         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2603
2604         if (auth_alg != ifmgd->auth_data->algorithm ||
2605             auth_transaction != ifmgd->auth_data->expected_transaction) {
2606                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2607                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2608                            auth_transaction,
2609                            ifmgd->auth_data->expected_transaction);
2610                 return;
2611         }
2612
2613         if (status_code != WLAN_STATUS_SUCCESS) {
2614                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2615                            mgmt->sa, status_code);
2616                 ieee80211_destroy_auth_data(sdata, false);
2617                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2618                 event.u.mlme.status = MLME_DENIED;
2619                 event.u.mlme.reason = status_code;
2620                 drv_event_callback(sdata->local, sdata, &event);
2621                 return;
2622         }
2623
2624         switch (ifmgd->auth_data->algorithm) {
2625         case WLAN_AUTH_OPEN:
2626         case WLAN_AUTH_LEAP:
2627         case WLAN_AUTH_FT:
2628         case WLAN_AUTH_SAE:
2629         case WLAN_AUTH_FILS_SK:
2630         case WLAN_AUTH_FILS_SK_PFS:
2631         case WLAN_AUTH_FILS_PK:
2632                 break;
2633         case WLAN_AUTH_SHARED_KEY:
2634                 if (ifmgd->auth_data->expected_transaction != 4) {
2635                         ieee80211_auth_challenge(sdata, mgmt, len);
2636                         /* need another frame */
2637                         return;
2638                 }
2639                 break;
2640         default:
2641                 WARN_ONCE(1, "invalid auth alg %d",
2642                           ifmgd->auth_data->algorithm);
2643                 return;
2644         }
2645
2646         event.u.mlme.status = MLME_SUCCESS;
2647         drv_event_callback(sdata->local, sdata, &event);
2648         sdata_info(sdata, "authenticated\n");
2649         ifmgd->auth_data->done = true;
2650         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2651         ifmgd->auth_data->timeout_started = true;
2652         run_again(sdata, ifmgd->auth_data->timeout);
2653
2654         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2655             ifmgd->auth_data->expected_transaction != 2) {
2656                 /*
2657                  * Report auth frame to user space for processing since another
2658                  * round of Authentication frames is still needed.
2659                  */
2660                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2661                 return;
2662         }
2663
2664         /* move station state to auth */
2665         mutex_lock(&sdata->local->sta_mtx);
2666         sta = sta_info_get(sdata, bssid);
2667         if (!sta) {
2668                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2669                 goto out_err;
2670         }
2671         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2672                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2673                 goto out_err;
2674         }
2675         mutex_unlock(&sdata->local->sta_mtx);
2676
2677         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2678         return;
2679  out_err:
2680         mutex_unlock(&sdata->local->sta_mtx);
2681         /* ignore frame -- wait for timeout */
2682 }
2683
2684 #define case_WLAN(type) \
2685         case WLAN_REASON_##type: return #type
2686
2687 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2688 {
2689         switch (reason_code) {
2690         case_WLAN(UNSPECIFIED);
2691         case_WLAN(PREV_AUTH_NOT_VALID);
2692         case_WLAN(DEAUTH_LEAVING);
2693         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2694         case_WLAN(DISASSOC_AP_BUSY);
2695         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2696         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2697         case_WLAN(DISASSOC_STA_HAS_LEFT);
2698         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2699         case_WLAN(DISASSOC_BAD_POWER);
2700         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2701         case_WLAN(INVALID_IE);
2702         case_WLAN(MIC_FAILURE);
2703         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2704         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2705         case_WLAN(IE_DIFFERENT);
2706         case_WLAN(INVALID_GROUP_CIPHER);
2707         case_WLAN(INVALID_PAIRWISE_CIPHER);
2708         case_WLAN(INVALID_AKMP);
2709         case_WLAN(UNSUPP_RSN_VERSION);
2710         case_WLAN(INVALID_RSN_IE_CAP);
2711         case_WLAN(IEEE8021X_FAILED);
2712         case_WLAN(CIPHER_SUITE_REJECTED);
2713         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2714         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2715         case_WLAN(DISASSOC_LOW_ACK);
2716         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2717         case_WLAN(QSTA_LEAVE_QBSS);
2718         case_WLAN(QSTA_NOT_USE);
2719         case_WLAN(QSTA_REQUIRE_SETUP);
2720         case_WLAN(QSTA_TIMEOUT);
2721         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2722         case_WLAN(MESH_PEER_CANCELED);
2723         case_WLAN(MESH_MAX_PEERS);
2724         case_WLAN(MESH_CONFIG);
2725         case_WLAN(MESH_CLOSE);
2726         case_WLAN(MESH_MAX_RETRIES);
2727         case_WLAN(MESH_CONFIRM_TIMEOUT);
2728         case_WLAN(MESH_INVALID_GTK);
2729         case_WLAN(MESH_INCONSISTENT_PARAM);
2730         case_WLAN(MESH_INVALID_SECURITY);
2731         case_WLAN(MESH_PATH_ERROR);
2732         case_WLAN(MESH_PATH_NOFORWARD);
2733         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2734         case_WLAN(MAC_EXISTS_IN_MBSS);
2735         case_WLAN(MESH_CHAN_REGULATORY);
2736         case_WLAN(MESH_CHAN);
2737         default: return "<unknown>";
2738         }
2739 }
2740
2741 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2742                                      struct ieee80211_mgmt *mgmt, size_t len)
2743 {
2744         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2745         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2746
2747         sdata_assert_lock(sdata);
2748
2749         if (len < 24 + 2)
2750                 return;
2751
2752         if (ifmgd->associated &&
2753             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2754                 const u8 *bssid = ifmgd->associated->bssid;
2755
2756                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2757                            bssid, reason_code,
2758                            ieee80211_get_reason_code_string(reason_code));
2759
2760                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2761
2762                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2763                                             reason_code);
2764                 return;
2765         }
2766
2767         if (ifmgd->assoc_data &&
2768             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2769                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2770
2771                 sdata_info(sdata,
2772                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2773                            bssid, reason_code,
2774                            ieee80211_get_reason_code_string(reason_code));
2775
2776                 ieee80211_destroy_assoc_data(sdata, false);
2777
2778                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2779                 return;
2780         }
2781 }
2782
2783
2784 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2785                                        struct ieee80211_mgmt *mgmt, size_t len)
2786 {
2787         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2788         u16 reason_code;
2789
2790         sdata_assert_lock(sdata);
2791
2792         if (len < 24 + 2)
2793                 return;
2794
2795         if (!ifmgd->associated ||
2796             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2797                 return;
2798
2799         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2800
2801         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2802                    mgmt->sa, reason_code);
2803
2804         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2805
2806         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2807 }
2808
2809 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2810                                 u8 *supp_rates, unsigned int supp_rates_len,
2811                                 u32 *rates, u32 *basic_rates,
2812                                 bool *have_higher_than_11mbit,
2813                                 int *min_rate, int *min_rate_index,
2814                                 int shift, u32 rate_flags)
2815 {
2816         int i, j;
2817
2818         for (i = 0; i < supp_rates_len; i++) {
2819                 int rate = supp_rates[i] & 0x7f;
2820                 bool is_basic = !!(supp_rates[i] & 0x80);
2821
2822                 if ((rate * 5 * (1 << shift)) > 110)
2823                         *have_higher_than_11mbit = true;
2824
2825                 /*
2826                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2827                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2828                  *
2829                  * Note: Even through the membership selector and the basic
2830                  *       rate flag share the same bit, they are not exactly
2831                  *       the same.
2832                  */
2833                 if (!!(supp_rates[i] & 0x80) &&
2834                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2835                         continue;
2836
2837                 for (j = 0; j < sband->n_bitrates; j++) {
2838                         struct ieee80211_rate *br;
2839                         int brate;
2840
2841                         br = &sband->bitrates[j];
2842                         if ((rate_flags & br->flags) != rate_flags)
2843                                 continue;
2844
2845                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2846                         if (brate == rate) {
2847                                 *rates |= BIT(j);
2848                                 if (is_basic)
2849                                         *basic_rates |= BIT(j);
2850                                 if ((rate * 5) < *min_rate) {
2851                                         *min_rate = rate * 5;
2852                                         *min_rate_index = j;
2853                                 }
2854                                 break;
2855                         }
2856                 }
2857         }
2858 }
2859
2860 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2861                                     struct cfg80211_bss *cbss,
2862                                     struct ieee80211_mgmt *mgmt, size_t len)
2863 {
2864         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2865         struct ieee80211_local *local = sdata->local;
2866         struct ieee80211_supported_band *sband;
2867         struct sta_info *sta;
2868         u8 *pos;
2869         u16 capab_info, aid;
2870         struct ieee802_11_elems elems;
2871         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2872         const struct cfg80211_bss_ies *bss_ies = NULL;
2873         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2874         u32 changed = 0;
2875         int err;
2876         bool ret;
2877
2878         /* AssocResp and ReassocResp have identical structure */
2879
2880         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2881         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2882
2883         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2884                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2885                            aid);
2886         aid &= ~(BIT(15) | BIT(14));
2887
2888         ifmgd->broken_ap = false;
2889
2890         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2891                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2892                            aid);
2893                 aid = 0;
2894                 ifmgd->broken_ap = true;
2895         }
2896
2897         pos = mgmt->u.assoc_resp.variable;
2898         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2899
2900         if (!elems.supp_rates) {
2901                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2902                 return false;
2903         }
2904
2905         ifmgd->aid = aid;
2906         ifmgd->tdls_chan_switch_prohibited =
2907                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2908                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2909
2910         /*
2911          * Some APs are erroneously not including some information in their
2912          * (re)association response frames. Try to recover by using the data
2913          * from the beacon or probe response. This seems to afflict mobile
2914          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2915          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2916          */
2917         if ((assoc_data->wmm && !elems.wmm_param) ||
2918             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2919              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2920             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2921              (!elems.vht_cap_elem || !elems.vht_operation))) {
2922                 const struct cfg80211_bss_ies *ies;
2923                 struct ieee802_11_elems bss_elems;
2924
2925                 rcu_read_lock();
2926                 ies = rcu_dereference(cbss->ies);
2927                 if (ies)
2928                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2929                                           GFP_ATOMIC);
2930                 rcu_read_unlock();
2931                 if (!bss_ies)
2932                         return false;
2933
2934                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2935                                        false, &bss_elems);
2936                 if (assoc_data->wmm &&
2937                     !elems.wmm_param && bss_elems.wmm_param) {
2938                         elems.wmm_param = bss_elems.wmm_param;
2939                         sdata_info(sdata,
2940                                    "AP bug: WMM param missing from AssocResp\n");
2941                 }
2942
2943                 /*
2944                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2945                  * have to include the IEs in the (re)association response.
2946                  */
2947                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2948                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2949                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2950                         sdata_info(sdata,
2951                                    "AP bug: HT capability missing from AssocResp\n");
2952                 }
2953                 if (!elems.ht_operation && bss_elems.ht_operation &&
2954                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2955                         elems.ht_operation = bss_elems.ht_operation;
2956                         sdata_info(sdata,
2957                                    "AP bug: HT operation missing from AssocResp\n");
2958                 }
2959                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2960                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2961                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2962                         sdata_info(sdata,
2963                                    "AP bug: VHT capa missing from AssocResp\n");
2964                 }
2965                 if (!elems.vht_operation && bss_elems.vht_operation &&
2966                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2967                         elems.vht_operation = bss_elems.vht_operation;
2968                         sdata_info(sdata,
2969                                    "AP bug: VHT operation missing from AssocResp\n");
2970                 }
2971         }
2972
2973         /*
2974          * We previously checked these in the beacon/probe response, so
2975          * they should be present here. This is just a safety net.
2976          */
2977         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2978             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2979                 sdata_info(sdata,
2980                            "HT AP is missing WMM params or HT capability/operation\n");
2981                 ret = false;
2982                 goto out;
2983         }
2984
2985         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2986             (!elems.vht_cap_elem || !elems.vht_operation)) {
2987                 sdata_info(sdata,
2988                            "VHT AP is missing VHT capability/operation\n");
2989                 ret = false;
2990                 goto out;
2991         }
2992
2993         mutex_lock(&sdata->local->sta_mtx);
2994         /*
2995          * station info was already allocated and inserted before
2996          * the association and should be available to us
2997          */
2998         sta = sta_info_get(sdata, cbss->bssid);
2999         if (WARN_ON(!sta)) {
3000                 mutex_unlock(&sdata->local->sta_mtx);
3001                 ret = false;
3002                 goto out;
3003         }
3004
3005         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
3006
3007         /* Set up internal HT/VHT capabilities */
3008         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3009                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3010                                                   elems.ht_cap_elem, sta);
3011
3012         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3013                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3014                                                     elems.vht_cap_elem, sta);
3015
3016         /*
3017          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3018          * in their association response, so ignore that data for our own
3019          * configuration. If it changed since the last beacon, we'll get the
3020          * next beacon and update then.
3021          */
3022
3023         /*
3024          * If an operating mode notification IE is present, override the
3025          * NSS calculation (that would be done in rate_control_rate_init())
3026          * and use the # of streams from that element.
3027          */
3028         if (elems.opmode_notif &&
3029             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3030                 u8 nss;
3031
3032                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3033                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3034                 nss += 1;
3035                 sta->sta.rx_nss = nss;
3036         }
3037
3038         rate_control_rate_init(sta);
3039
3040         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3041                 set_sta_flag(sta, WLAN_STA_MFP);
3042                 sta->sta.mfp = true;
3043         } else {
3044                 sta->sta.mfp = false;
3045         }
3046
3047         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3048
3049         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3050         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3051                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3052         if (err) {
3053                 sdata_info(sdata,
3054                            "failed to move station %pM to desired state\n",
3055                            sta->sta.addr);
3056                 WARN_ON(__sta_info_destroy(sta));
3057                 mutex_unlock(&sdata->local->sta_mtx);
3058                 ret = false;
3059                 goto out;
3060         }
3061
3062         mutex_unlock(&sdata->local->sta_mtx);
3063
3064         /*
3065          * Always handle WMM once after association regardless
3066          * of the first value the AP uses. Setting -1 here has
3067          * that effect because the AP values is an unsigned
3068          * 4-bit value.
3069          */
3070         ifmgd->wmm_last_param_set = -1;
3071
3072         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3073                 ieee80211_set_wmm_default(sdata, false, false);
3074         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3075                                              elems.wmm_param_len)) {
3076                 /* still enable QoS since we might have HT/VHT */
3077                 ieee80211_set_wmm_default(sdata, false, true);
3078                 /* set the disable-WMM flag in this case to disable
3079                  * tracking WMM parameter changes in the beacon if
3080                  * the parameters weren't actually valid. Doing so
3081                  * avoids changing parameters very strangely when
3082                  * the AP is going back and forth between valid and
3083                  * invalid parameters.
3084                  */
3085                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3086         }
3087         changed |= BSS_CHANGED_QOS;
3088
3089         /* set AID and assoc capability,
3090          * ieee80211_set_associated() will tell the driver */
3091         bss_conf->aid = aid;
3092         bss_conf->assoc_capability = capab_info;
3093         ieee80211_set_associated(sdata, cbss, changed);
3094
3095         /*
3096          * If we're using 4-addr mode, let the AP know that we're
3097          * doing so, so that it can create the STA VLAN on its side
3098          */
3099         if (ifmgd->use_4addr)
3100                 ieee80211_send_4addr_nullfunc(local, sdata);
3101
3102         /*
3103          * Start timer to probe the connection to the AP now.
3104          * Also start the timer that will detect beacon loss.
3105          */
3106         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3107         ieee80211_sta_reset_beacon_monitor(sdata);
3108
3109         ret = true;
3110  out:
3111         kfree(bss_ies);
3112         return ret;
3113 }
3114
3115 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3116                                          struct ieee80211_mgmt *mgmt,
3117                                          size_t len)
3118 {
3119         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3120         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3121         u16 capab_info, status_code, aid;
3122         struct ieee802_11_elems elems;
3123         int ac, uapsd_queues = -1;
3124         u8 *pos;
3125         bool reassoc;
3126         struct cfg80211_bss *bss;
3127         struct ieee80211_event event = {
3128                 .type = MLME_EVENT,
3129                 .u.mlme.data = ASSOC_EVENT,
3130         };
3131
3132         sdata_assert_lock(sdata);
3133
3134         if (!assoc_data)
3135                 return;
3136         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3137                 return;
3138
3139         /*
3140          * AssocResp and ReassocResp have identical structure, so process both
3141          * of them in this function.
3142          */
3143
3144         if (len < 24 + 6)
3145                 return;
3146
3147         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3148         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3149         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3150         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3151
3152         sdata_info(sdata,
3153                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3154                    reassoc ? "Rea" : "A", mgmt->sa,
3155                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3156
3157         if (assoc_data->fils_kek_len &&
3158             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3159                 return;
3160
3161         pos = mgmt->u.assoc_resp.variable;
3162         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3163
3164         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3165             elems.timeout_int &&
3166             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3167                 u32 tu, ms;
3168                 tu = le32_to_cpu(elems.timeout_int->value);
3169                 ms = tu * 1024 / 1000;
3170                 sdata_info(sdata,
3171                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3172                            mgmt->sa, tu, ms);
3173                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3174                 assoc_data->timeout_started = true;
3175                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3176                         run_again(sdata, assoc_data->timeout);
3177                 return;
3178         }
3179
3180         bss = assoc_data->bss;
3181
3182         if (status_code != WLAN_STATUS_SUCCESS) {
3183                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3184                            mgmt->sa, status_code);
3185                 ieee80211_destroy_assoc_data(sdata, false);
3186                 event.u.mlme.status = MLME_DENIED;
3187                 event.u.mlme.reason = status_code;
3188                 drv_event_callback(sdata->local, sdata, &event);
3189         } else {
3190                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3191                         /* oops -- internal error -- send timeout for now */
3192                         ieee80211_destroy_assoc_data(sdata, false);
3193                         cfg80211_assoc_timeout(sdata->dev, bss);
3194                         return;
3195                 }
3196                 event.u.mlme.status = MLME_SUCCESS;
3197                 drv_event_callback(sdata->local, sdata, &event);
3198                 sdata_info(sdata, "associated\n");
3199
3200                 /*
3201                  * destroy assoc_data afterwards, as otherwise an idle
3202                  * recalc after assoc_data is NULL but before associated
3203                  * is set can cause the interface to go idle
3204                  */
3205                 ieee80211_destroy_assoc_data(sdata, true);
3206
3207                 /* get uapsd queues configuration */
3208                 uapsd_queues = 0;
3209                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3210                         if (sdata->tx_conf[ac].uapsd)
3211                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3212         }
3213
3214         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3215 }
3216
3217 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3218                                   struct ieee80211_mgmt *mgmt, size_t len,
3219                                   struct ieee80211_rx_status *rx_status,
3220                                   struct ieee802_11_elems *elems)
3221 {
3222         struct ieee80211_local *local = sdata->local;
3223         struct ieee80211_bss *bss;
3224         struct ieee80211_channel *channel;
3225
3226         sdata_assert_lock(sdata);
3227
3228         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3229         if (!channel)
3230                 return;
3231
3232         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3233                                         channel);
3234         if (bss) {
3235                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3236                 ieee80211_rx_bss_put(local, bss);
3237         }
3238 }
3239
3240
3241 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3242                                          struct sk_buff *skb)
3243 {
3244         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3245         struct ieee80211_if_managed *ifmgd;
3246         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3247         size_t baselen, len = skb->len;
3248         struct ieee802_11_elems elems;
3249
3250         ifmgd = &sdata->u.mgd;
3251
3252         sdata_assert_lock(sdata);
3253
3254         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3255                 return; /* ignore ProbeResp to foreign address */
3256
3257         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3258         if (baselen > len)
3259                 return;
3260
3261         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3262                                false, &elems);
3263
3264         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3265
3266         if (ifmgd->associated &&
3267             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3268                 ieee80211_reset_ap_probe(sdata);
3269 }
3270
3271 /*
3272  * This is the canonical list of information elements we care about,
3273  * the filter code also gives us all changes to the Microsoft OUI
3274  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3275  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3276  * changes to requested client power.
3277  *
3278  * We implement beacon filtering in software since that means we can
3279  * avoid processing the frame here and in cfg80211, and userspace
3280  * will not be able to tell whether the hardware supports it or not.
3281  *
3282  * XXX: This list needs to be dynamic -- userspace needs to be able to
3283  *      add items it requires. It also needs to be able to tell us to
3284  *      look out for other vendor IEs.
3285  */
3286 static const u64 care_about_ies =
3287         (1ULL << WLAN_EID_COUNTRY) |
3288         (1ULL << WLAN_EID_ERP_INFO) |
3289         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3290         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3291         (1ULL << WLAN_EID_HT_CAPABILITY) |
3292         (1ULL << WLAN_EID_HT_OPERATION) |
3293         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3294
3295 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3296                                      struct ieee80211_mgmt *mgmt, size_t len,
3297                                      struct ieee80211_rx_status *rx_status)
3298 {
3299         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3300         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3301         size_t baselen;
3302         struct ieee802_11_elems elems;
3303         struct ieee80211_local *local = sdata->local;
3304         struct ieee80211_chanctx_conf *chanctx_conf;
3305         struct ieee80211_channel *chan;
3306         struct sta_info *sta;
3307         u32 changed = 0;
3308         bool erp_valid;
3309         u8 erp_value = 0;
3310         u32 ncrc;
3311         u8 *bssid;
3312         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3313
3314         sdata_assert_lock(sdata);
3315
3316         /* Process beacon from the current BSS */
3317         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3318         if (baselen > len)
3319                 return;
3320
3321         rcu_read_lock();
3322         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3323         if (!chanctx_conf) {
3324                 rcu_read_unlock();
3325                 return;
3326         }
3327
3328         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3329                 rcu_read_unlock();
3330                 return;
3331         }
3332         chan = chanctx_conf->def.chan;
3333         rcu_read_unlock();
3334
3335         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3336             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3337                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3338                                        len - baselen, false, &elems);
3339
3340                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3341                 if (elems.tim && !elems.parse_error) {
3342                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3343                         ifmgd->dtim_period = tim_ie->dtim_period;
3344                 }
3345                 ifmgd->have_beacon = true;
3346                 ifmgd->assoc_data->need_beacon = false;
3347                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3348                         sdata->vif.bss_conf.sync_tsf =
3349                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3350                         sdata->vif.bss_conf.sync_device_ts =
3351                                 rx_status->device_timestamp;
3352                         if (elems.tim)
3353                                 sdata->vif.bss_conf.sync_dtim_count =
3354                                         elems.tim->dtim_count;
3355                         else
3356                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3357                 }
3358                 /* continue assoc process */
3359                 ifmgd->assoc_data->timeout = jiffies;
3360                 ifmgd->assoc_data->timeout_started = true;
3361                 run_again(sdata, ifmgd->assoc_data->timeout);
3362                 return;
3363         }
3364
3365         if (!ifmgd->associated ||
3366             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3367                 return;
3368         bssid = ifmgd->associated->bssid;
3369
3370         /* Track average RSSI from the Beacon frames of the current AP */
3371         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3372                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3373                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3374                 ifmgd->last_cqm_event_signal = 0;
3375                 ifmgd->count_beacon_signal = 1;
3376                 ifmgd->last_ave_beacon_signal = 0;
3377         } else {
3378                 ifmgd->count_beacon_signal++;
3379         }
3380
3381         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3382
3383         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3384             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3385                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3386                 int last_sig = ifmgd->last_ave_beacon_signal;
3387                 struct ieee80211_event event = {
3388                         .type = RSSI_EVENT,
3389                 };
3390
3391                 /*
3392                  * if signal crosses either of the boundaries, invoke callback
3393                  * with appropriate parameters
3394                  */
3395                 if (sig > ifmgd->rssi_max_thold &&
3396                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3397                         ifmgd->last_ave_beacon_signal = sig;
3398                         event.u.rssi.data = RSSI_EVENT_HIGH;
3399                         drv_event_callback(local, sdata, &event);
3400                 } else if (sig < ifmgd->rssi_min_thold &&
3401                            (last_sig >= ifmgd->rssi_max_thold ||
3402                            last_sig == 0)) {
3403                         ifmgd->last_ave_beacon_signal = sig;
3404                         event.u.rssi.data = RSSI_EVENT_LOW;
3405                         drv_event_callback(local, sdata, &event);
3406                 }
3407         }
3408
3409         if (bss_conf->cqm_rssi_thold &&
3410             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3411             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3412                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3413                 int last_event = ifmgd->last_cqm_event_signal;
3414                 int thold = bss_conf->cqm_rssi_thold;
3415                 int hyst = bss_conf->cqm_rssi_hyst;
3416
3417                 if (sig < thold &&
3418                     (last_event == 0 || sig < last_event - hyst)) {
3419                         ifmgd->last_cqm_event_signal = sig;
3420                         ieee80211_cqm_rssi_notify(
3421                                 &sdata->vif,
3422                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3423                                 GFP_KERNEL);
3424                 } else if (sig > thold &&
3425                            (last_event == 0 || sig > last_event + hyst)) {
3426                         ifmgd->last_cqm_event_signal = sig;
3427                         ieee80211_cqm_rssi_notify(
3428                                 &sdata->vif,
3429                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3430                                 GFP_KERNEL);
3431                 }
3432         }
3433
3434         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3435                 mlme_dbg_ratelimited(sdata,
3436                                      "cancelling AP probe due to a received beacon\n");
3437                 ieee80211_reset_ap_probe(sdata);
3438         }
3439
3440         /*
3441          * Push the beacon loss detection into the future since
3442          * we are processing a beacon from the AP just now.
3443          */
3444         ieee80211_sta_reset_beacon_monitor(sdata);
3445
3446         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3447         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3448                                           len - baselen, false, &elems,
3449                                           care_about_ies, ncrc);
3450
3451         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3452             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3453                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3454                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3455                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3456                                 ieee80211_hw_config(local,
3457                                                     IEEE80211_CONF_CHANGE_PS);
3458                         }
3459                         ieee80211_send_nullfunc(local, sdata, false);
3460                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3461                         local->pspolling = true;
3462
3463                         /*
3464                          * Here is assumed that the driver will be
3465                          * able to send ps-poll frame and receive a
3466                          * response even though power save mode is
3467                          * enabled, but some drivers might require
3468                          * to disable power save here. This needs
3469                          * to be investigated.
3470                          */
3471                         ieee80211_send_pspoll(local, sdata);
3472                 }
3473         }
3474
3475         if (sdata->vif.p2p ||
3476             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3477                 struct ieee80211_p2p_noa_attr noa = {};
3478                 int ret;
3479
3480                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3481                                             len - baselen,
3482                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3483                                             (u8 *) &noa, sizeof(noa));
3484                 if (ret >= 2) {
3485                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3486                                 /* valid noa_attr and index changed */
3487                                 sdata->u.mgd.p2p_noa_index = noa.index;
3488                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3489                                 changed |= BSS_CHANGED_P2P_PS;
3490                                 /*
3491                                  * make sure we update all information, the CRC
3492                                  * mechanism doesn't look at P2P attributes.
3493                                  */
3494                                 ifmgd->beacon_crc_valid = false;
3495                         }
3496                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3497                         /* noa_attr not found and we had valid noa_attr before */
3498                         sdata->u.mgd.p2p_noa_index = -1;
3499                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3500                         changed |= BSS_CHANGED_P2P_PS;
3501                         ifmgd->beacon_crc_valid = false;
3502                 }
3503         }
3504
3505         if (ifmgd->csa_waiting_bcn)
3506                 ieee80211_chswitch_post_beacon(sdata);
3507
3508         /*
3509          * Update beacon timing and dtim count on every beacon appearance. This
3510          * will allow the driver to use the most updated values. Do it before
3511          * comparing this one with last received beacon.
3512          * IMPORTANT: These parameters would possibly be out of sync by the time
3513          * the driver will use them. The synchronized view is currently
3514          * guaranteed only in certain callbacks.
3515          */
3516         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3517                 sdata->vif.bss_conf.sync_tsf =
3518                         le64_to_cpu(mgmt->u.beacon.timestamp);
3519                 sdata->vif.bss_conf.sync_device_ts =
3520                         rx_status->device_timestamp;
3521                 if (elems.tim)
3522                         sdata->vif.bss_conf.sync_dtim_count =
3523                                 elems.tim->dtim_count;
3524                 else
3525                         sdata->vif.bss_conf.sync_dtim_count = 0;
3526         }
3527
3528         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3529                 return;
3530         ifmgd->beacon_crc = ncrc;
3531         ifmgd->beacon_crc_valid = true;
3532
3533         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3534
3535         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3536                                          rx_status->device_timestamp,
3537                                          &elems, true);
3538
3539         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3540             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3541                                      elems.wmm_param_len))
3542                 changed |= BSS_CHANGED_QOS;
3543
3544         /*
3545          * If we haven't had a beacon before, tell the driver about the
3546          * DTIM period (and beacon timing if desired) now.
3547          */
3548         if (!ifmgd->have_beacon) {
3549                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3550                 if (elems.tim)
3551                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3552                 else
3553                         bss_conf->dtim_period = 1;
3554
3555                 changed |= BSS_CHANGED_BEACON_INFO;
3556                 ifmgd->have_beacon = true;
3557
3558                 mutex_lock(&local->iflist_mtx);
3559                 ieee80211_recalc_ps(local);
3560                 mutex_unlock(&local->iflist_mtx);
3561
3562                 ieee80211_recalc_ps_vif(sdata);
3563         }
3564
3565         if (elems.erp_info) {
3566                 erp_valid = true;
3567                 erp_value = elems.erp_info[0];
3568         } else {
3569                 erp_valid = false;
3570         }
3571         changed |= ieee80211_handle_bss_capability(sdata,
3572                         le16_to_cpu(mgmt->u.beacon.capab_info),
3573                         erp_valid, erp_value);
3574
3575         mutex_lock(&local->sta_mtx);
3576         sta = sta_info_get(sdata, bssid);
3577
3578         if (ieee80211_config_bw(sdata, sta,
3579                                 elems.ht_cap_elem, elems.ht_operation,
3580                                 elems.vht_operation, bssid, &changed)) {
3581                 mutex_unlock(&local->sta_mtx);
3582                 sdata_info(sdata,
3583                            "failed to follow AP %pM bandwidth change, disconnect\n",
3584                            bssid);
3585                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3586                                        WLAN_REASON_DEAUTH_LEAVING,
3587                                        true, deauth_buf);
3588                 ieee80211_report_disconnect(sdata, deauth_buf,
3589                                             sizeof(deauth_buf), true,
3590                                             WLAN_REASON_DEAUTH_LEAVING);
3591                 return;
3592         }
3593
3594         if (sta && elems.opmode_notif)
3595                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3596                                             rx_status->band);
3597         mutex_unlock(&local->sta_mtx);
3598
3599         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3600                                                elems.country_elem,
3601                                                elems.country_elem_len,
3602                                                elems.pwr_constr_elem,
3603                                                elems.cisco_dtpc_elem);
3604
3605         ieee80211_bss_info_change_notify(sdata, changed);
3606 }
3607
3608 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3609                                   struct sk_buff *skb)
3610 {
3611         struct ieee80211_rx_status *rx_status;
3612         struct ieee80211_mgmt *mgmt;
3613         u16 fc;
3614         struct ieee802_11_elems elems;
3615         int ies_len;
3616
3617         rx_status = (struct ieee80211_rx_status *) skb->cb;
3618         mgmt = (struct ieee80211_mgmt *) skb->data;
3619         fc = le16_to_cpu(mgmt->frame_control);
3620
3621         sdata_lock(sdata);
3622
3623         switch (fc & IEEE80211_FCTL_STYPE) {
3624         case IEEE80211_STYPE_BEACON:
3625                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3626                 break;
3627         case IEEE80211_STYPE_PROBE_RESP:
3628                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3629                 break;
3630         case IEEE80211_STYPE_AUTH:
3631                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3632                 break;
3633         case IEEE80211_STYPE_DEAUTH:
3634                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3635                 break;
3636         case IEEE80211_STYPE_DISASSOC:
3637                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3638                 break;
3639         case IEEE80211_STYPE_ASSOC_RESP:
3640         case IEEE80211_STYPE_REASSOC_RESP:
3641                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3642                 break;
3643         case IEEE80211_STYPE_ACTION:
3644                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3645                         ies_len = skb->len -
3646                                   offsetof(struct ieee80211_mgmt,
3647                                            u.action.u.chan_switch.variable);
3648
3649                         if (ies_len < 0)
3650                                 break;
3651
3652                         ieee802_11_parse_elems(
3653                                 mgmt->u.action.u.chan_switch.variable,
3654                                 ies_len, true, &elems);
3655
3656                         if (elems.parse_error)
3657                                 break;
3658
3659                         ieee80211_sta_process_chanswitch(sdata,
3660                                                  rx_status->mactime,
3661                                                  rx_status->device_timestamp,
3662                                                  &elems, false);
3663                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3664                         ies_len = skb->len -
3665                                   offsetof(struct ieee80211_mgmt,
3666                                            u.action.u.ext_chan_switch.variable);
3667
3668                         if (ies_len < 0)
3669                                 break;
3670
3671                         ieee802_11_parse_elems(
3672                                 mgmt->u.action.u.ext_chan_switch.variable,
3673                                 ies_len, true, &elems);
3674
3675                         if (elems.parse_error)
3676                                 break;
3677
3678                         /* for the handling code pretend this was also an IE */
3679                         elems.ext_chansw_ie =
3680                                 &mgmt->u.action.u.ext_chan_switch.data;
3681
3682                         ieee80211_sta_process_chanswitch(sdata,
3683                                                  rx_status->mactime,
3684                                                  rx_status->device_timestamp,
3685                                                  &elems, false);
3686                 }
3687                 break;
3688         }
3689         sdata_unlock(sdata);
3690 }
3691
3692 static void ieee80211_sta_timer(unsigned long data)
3693 {
3694         struct ieee80211_sub_if_data *sdata =
3695                 (struct ieee80211_sub_if_data *) data;
3696
3697         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3698 }
3699
3700 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3701                                           u8 *bssid, u8 reason, bool tx)
3702 {
3703         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3704
3705         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3706                                tx, frame_buf);
3707
3708         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3709                                     reason);
3710 }
3711
3712 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3713 {
3714         struct ieee80211_local *local = sdata->local;
3715         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3716         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3717         u32 tx_flags = 0;
3718         u16 trans = 1;
3719         u16 status = 0;
3720
3721         sdata_assert_lock(sdata);
3722
3723         if (WARN_ON_ONCE(!auth_data))
3724                 return -EINVAL;
3725
3726         auth_data->tries++;
3727
3728         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3729                 sdata_info(sdata, "authentication with %pM timed out\n",
3730                            auth_data->bss->bssid);
3731
3732                 /*
3733                  * Most likely AP is not in the range so remove the
3734                  * bss struct for that AP.
3735                  */
3736                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3737
3738                 return -ETIMEDOUT;
3739         }
3740
3741         drv_mgd_prepare_tx(local, sdata);
3742
3743         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3744                    auth_data->bss->bssid, auth_data->tries,
3745                    IEEE80211_AUTH_MAX_TRIES);
3746
3747         auth_data->expected_transaction = 2;
3748
3749         if (auth_data->algorithm == WLAN_AUTH_SAE) {
3750                 trans = auth_data->sae_trans;
3751                 status = auth_data->sae_status;
3752                 auth_data->expected_transaction = trans;
3753         }
3754
3755         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3756                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3757                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3758
3759         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3760                             auth_data->data, auth_data->data_len,
3761                             auth_data->bss->bssid,
3762                             auth_data->bss->bssid, NULL, 0, 0,
3763                             tx_flags);
3764
3765         if (tx_flags == 0) {
3766                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3767                 auth_data->timeout_started = true;
3768                 run_again(sdata, auth_data->timeout);
3769         } else {
3770                 auth_data->timeout =
3771                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3772                 auth_data->timeout_started = true;
3773                 run_again(sdata, auth_data->timeout);
3774         }
3775
3776         return 0;
3777 }
3778
3779 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3780 {
3781         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3782         struct ieee80211_local *local = sdata->local;
3783
3784         sdata_assert_lock(sdata);
3785
3786         assoc_data->tries++;
3787         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3788                 sdata_info(sdata, "association with %pM timed out\n",
3789                            assoc_data->bss->bssid);
3790
3791                 /*
3792                  * Most likely AP is not in the range so remove the
3793                  * bss struct for that AP.
3794                  */
3795                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3796
3797                 return -ETIMEDOUT;
3798         }
3799
3800         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3801                    assoc_data->bss->bssid, assoc_data->tries,
3802                    IEEE80211_ASSOC_MAX_TRIES);
3803         ieee80211_send_assoc(sdata);
3804
3805         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3806                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3807                 assoc_data->timeout_started = true;
3808                 run_again(sdata, assoc_data->timeout);
3809         } else {
3810                 assoc_data->timeout =
3811                         round_jiffies_up(jiffies +
3812                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3813                 assoc_data->timeout_started = true;
3814                 run_again(sdata, assoc_data->timeout);
3815         }
3816
3817         return 0;
3818 }
3819
3820 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3821                                   __le16 fc, bool acked)
3822 {
3823         struct ieee80211_local *local = sdata->local;
3824
3825         sdata->u.mgd.status_fc = fc;
3826         sdata->u.mgd.status_acked = acked;
3827         sdata->u.mgd.status_received = true;
3828
3829         ieee80211_queue_work(&local->hw, &sdata->work);
3830 }
3831
3832 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3833 {
3834         struct ieee80211_local *local = sdata->local;
3835         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3836
3837         sdata_lock(sdata);
3838
3839         if (ifmgd->status_received) {
3840                 __le16 fc = ifmgd->status_fc;
3841                 bool status_acked = ifmgd->status_acked;
3842
3843                 ifmgd->status_received = false;
3844                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3845                         if (status_acked) {
3846                                 ifmgd->auth_data->timeout =
3847                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3848                                 run_again(sdata, ifmgd->auth_data->timeout);
3849                         } else {
3850                                 ifmgd->auth_data->timeout = jiffies - 1;
3851                         }
3852                         ifmgd->auth_data->timeout_started = true;
3853                 } else if (ifmgd->assoc_data &&
3854                            (ieee80211_is_assoc_req(fc) ||
3855                             ieee80211_is_reassoc_req(fc))) {
3856                         if (status_acked) {
3857                                 ifmgd->assoc_data->timeout =
3858                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3859                                 run_again(sdata, ifmgd->assoc_data->timeout);
3860                         } else {
3861                                 ifmgd->assoc_data->timeout = jiffies - 1;
3862                         }
3863                         ifmgd->assoc_data->timeout_started = true;
3864                 }
3865         }
3866
3867         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3868             time_after(jiffies, ifmgd->auth_data->timeout)) {
3869                 if (ifmgd->auth_data->done) {
3870                         /*
3871                          * ok ... we waited for assoc but userspace didn't,
3872                          * so let's just kill the auth data
3873                          */
3874                         ieee80211_destroy_auth_data(sdata, false);
3875                 } else if (ieee80211_auth(sdata)) {
3876                         u8 bssid[ETH_ALEN];
3877                         struct ieee80211_event event = {
3878                                 .type = MLME_EVENT,
3879                                 .u.mlme.data = AUTH_EVENT,
3880                                 .u.mlme.status = MLME_TIMEOUT,
3881                         };
3882
3883                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3884
3885                         ieee80211_destroy_auth_data(sdata, false);
3886
3887                         cfg80211_auth_timeout(sdata->dev, bssid);
3888                         drv_event_callback(sdata->local, sdata, &event);
3889                 }
3890         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3891                 run_again(sdata, ifmgd->auth_data->timeout);
3892
3893         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3894             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3895                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3896                     ieee80211_do_assoc(sdata)) {
3897                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3898                         struct ieee80211_event event = {
3899                                 .type = MLME_EVENT,
3900                                 .u.mlme.data = ASSOC_EVENT,
3901                                 .u.mlme.status = MLME_TIMEOUT,
3902                         };
3903
3904                         ieee80211_destroy_assoc_data(sdata, false);
3905                         cfg80211_assoc_timeout(sdata->dev, bss);
3906                         drv_event_callback(sdata->local, sdata, &event);
3907                 }
3908         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3909                 run_again(sdata, ifmgd->assoc_data->timeout);
3910
3911         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3912             ifmgd->associated) {
3913                 u8 bssid[ETH_ALEN];
3914                 int max_tries;
3915
3916                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3917
3918                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3919                         max_tries = max_nullfunc_tries;
3920                 else
3921                         max_tries = max_probe_tries;
3922
3923                 /* ACK received for nullfunc probing frame */
3924                 if (!ifmgd->probe_send_count)
3925                         ieee80211_reset_ap_probe(sdata);
3926                 else if (ifmgd->nullfunc_failed) {
3927                         if (ifmgd->probe_send_count < max_tries) {
3928                                 mlme_dbg(sdata,
3929                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3930                                          bssid, ifmgd->probe_send_count,
3931                                          max_tries);
3932                                 ieee80211_mgd_probe_ap_send(sdata);
3933                         } else {
3934                                 mlme_dbg(sdata,
3935                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3936                                          bssid);
3937                                 ieee80211_sta_connection_lost(sdata, bssid,
3938                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3939                                         false);
3940                         }
3941                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3942                         run_again(sdata, ifmgd->probe_timeout);
3943                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3944                         mlme_dbg(sdata,
3945                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3946                                  bssid, probe_wait_ms);
3947                         ieee80211_sta_connection_lost(sdata, bssid,
3948                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3949                 } else if (ifmgd->probe_send_count < max_tries) {
3950                         mlme_dbg(sdata,
3951                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3952                                  bssid, probe_wait_ms,
3953                                  ifmgd->probe_send_count, max_tries);
3954                         ieee80211_mgd_probe_ap_send(sdata);
3955                 } else {
3956                         /*
3957                          * We actually lost the connection ... or did we?
3958                          * Let's make sure!
3959                          */
3960                         mlme_dbg(sdata,
3961                                  "No probe response from AP %pM after %dms, disconnecting.\n",
3962                                  bssid, probe_wait_ms);
3963
3964                         ieee80211_sta_connection_lost(sdata, bssid,
3965                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3966                 }
3967         }
3968
3969         sdata_unlock(sdata);
3970 }
3971
3972 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3973 {
3974         struct ieee80211_sub_if_data *sdata =
3975                 (struct ieee80211_sub_if_data *) data;
3976         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3977
3978         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3979                 return;
3980
3981         sdata->u.mgd.connection_loss = false;
3982         ieee80211_queue_work(&sdata->local->hw,
3983                              &sdata->u.mgd.beacon_connection_loss_work);
3984 }
3985
3986 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3987 {
3988         struct ieee80211_sub_if_data *sdata =
3989                 (struct ieee80211_sub_if_data *) data;
3990         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3991         struct ieee80211_local *local = sdata->local;
3992
3993         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3994                 return;
3995
3996         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3997 }
3998
3999 static void ieee80211_sta_monitor_work(struct work_struct *work)
4000 {
4001         struct ieee80211_sub_if_data *sdata =
4002                 container_of(work, struct ieee80211_sub_if_data,
4003                              u.mgd.monitor_work);
4004
4005         ieee80211_mgd_probe_ap(sdata, false);
4006 }
4007
4008 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4009 {
4010         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4011                 __ieee80211_stop_poll(sdata);
4012
4013                 /* let's probe the connection once */
4014                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4015                         ieee80211_queue_work(&sdata->local->hw,
4016                                              &sdata->u.mgd.monitor_work);
4017         }
4018 }
4019
4020 #ifdef CONFIG_PM
4021 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4022 {
4023         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4024         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4025
4026         sdata_lock(sdata);
4027
4028         if (ifmgd->auth_data || ifmgd->assoc_data) {
4029                 const u8 *bssid = ifmgd->auth_data ?
4030                                 ifmgd->auth_data->bss->bssid :
4031                                 ifmgd->assoc_data->bss->bssid;
4032
4033                 /*
4034                  * If we are trying to authenticate / associate while suspending,
4035                  * cfg80211 won't know and won't actually abort those attempts,
4036                  * thus we need to do that ourselves.
4037                  */
4038                 ieee80211_send_deauth_disassoc(sdata, bssid,
4039                                                IEEE80211_STYPE_DEAUTH,
4040                                                WLAN_REASON_DEAUTH_LEAVING,
4041                                                false, frame_buf);
4042                 if (ifmgd->assoc_data)
4043                         ieee80211_destroy_assoc_data(sdata, false);
4044                 if (ifmgd->auth_data)
4045                         ieee80211_destroy_auth_data(sdata, false);
4046                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4047                                       IEEE80211_DEAUTH_FRAME_LEN);
4048         }
4049
4050         /* This is a bit of a hack - we should find a better and more generic
4051          * solution to this. Normally when suspending, cfg80211 will in fact
4052          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4053          * auth (not so important) or assoc (this is the problem) process.
4054          *
4055          * As a consequence, it can happen that we are in the process of both
4056          * associating and suspending, and receive an association response
4057          * after cfg80211 has checked if it needs to disconnect, but before
4058          * we actually set the flag to drop incoming frames. This will then
4059          * cause the workqueue flush to process the association response in
4060          * the suspend, resulting in a successful association just before it
4061          * tries to remove the interface from the driver, which now though
4062          * has a channel context assigned ... this results in issues.
4063          *
4064          * To work around this (for now) simply deauth here again if we're
4065          * now connected.
4066          */
4067         if (ifmgd->associated && !sdata->local->wowlan) {
4068                 u8 bssid[ETH_ALEN];
4069                 struct cfg80211_deauth_request req = {
4070                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4071                         .bssid = bssid,
4072                 };
4073
4074                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4075                 ieee80211_mgd_deauth(sdata, &req);
4076         }
4077
4078         sdata_unlock(sdata);
4079 }
4080
4081 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4082 {
4083         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4084
4085         sdata_lock(sdata);
4086         if (!ifmgd->associated) {
4087                 sdata_unlock(sdata);
4088                 return;
4089         }
4090
4091         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4092                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4093                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4094                 ieee80211_sta_connection_lost(sdata,
4095                                               ifmgd->associated->bssid,
4096                                               WLAN_REASON_UNSPECIFIED,
4097                                               true);
4098                 sdata_unlock(sdata);
4099                 return;
4100         }
4101         sdata_unlock(sdata);
4102 }
4103 #endif
4104
4105 /* interface setup */
4106 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4107 {
4108         struct ieee80211_if_managed *ifmgd;
4109
4110         ifmgd = &sdata->u.mgd;
4111         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4112         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4113         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4114                   ieee80211_beacon_connection_loss_work);
4115         INIT_WORK(&ifmgd->csa_connection_drop_work,
4116                   ieee80211_csa_connection_drop_work);
4117         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4118         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4119                           ieee80211_tdls_peer_del_work);
4120         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4121                     (unsigned long) sdata);
4122         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4123                     (unsigned long) sdata);
4124         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4125                     (unsigned long) sdata);
4126         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4127                     (unsigned long) sdata);
4128         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4129                           ieee80211_sta_handle_tspec_ac_params_wk);
4130
4131         ifmgd->flags = 0;
4132         ifmgd->powersave = sdata->wdev.ps;
4133         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4134         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4135         ifmgd->p2p_noa_index = -1;
4136
4137         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4138                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4139         else
4140                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4141
4142         /* Setup TDLS data */
4143         spin_lock_init(&ifmgd->teardown_lock);
4144         ifmgd->teardown_skb = NULL;
4145         ifmgd->orig_teardown_skb = NULL;
4146 }
4147
4148 /* scan finished notification */
4149 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4150 {
4151         struct ieee80211_sub_if_data *sdata;
4152
4153         /* Restart STA timers */
4154         rcu_read_lock();
4155         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4156                 if (ieee80211_sdata_running(sdata))
4157                         ieee80211_restart_sta_timer(sdata);
4158         }
4159         rcu_read_unlock();
4160 }
4161
4162 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4163                                      struct cfg80211_bss *cbss)
4164 {
4165         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4166         const u8 *ht_cap_ie, *vht_cap_ie;
4167         const struct ieee80211_ht_cap *ht_cap;
4168         const struct ieee80211_vht_cap *vht_cap;
4169         u8 chains = 1;
4170
4171         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4172                 return chains;
4173
4174         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4175         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4176                 ht_cap = (void *)(ht_cap_ie + 2);
4177                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4178                 /*
4179                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4180                  *       "Tx Unequal Modulation Supported" fields.
4181                  */
4182         }
4183
4184         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4185                 return chains;
4186
4187         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4188         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4189                 u8 nss;
4190                 u16 tx_mcs_map;
4191
4192                 vht_cap = (void *)(vht_cap_ie + 2);
4193                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4194                 for (nss = 8; nss > 0; nss--) {
4195                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4196                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4197                                 break;
4198                 }
4199                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4200                 chains = max(chains, nss);
4201         }
4202
4203         return chains;
4204 }
4205
4206 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4207                                   struct cfg80211_bss *cbss)
4208 {
4209         struct ieee80211_local *local = sdata->local;
4210         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4211         const struct ieee80211_ht_cap *ht_cap = NULL;
4212         const struct ieee80211_ht_operation *ht_oper = NULL;
4213         const struct ieee80211_vht_operation *vht_oper = NULL;
4214         struct ieee80211_supported_band *sband;
4215         struct cfg80211_chan_def chandef;
4216         int ret;
4217         u32 i;
4218         bool have_80mhz;
4219
4220         sband = local->hw.wiphy->bands[cbss->channel->band];
4221
4222         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4223                           IEEE80211_STA_DISABLE_80P80MHZ |
4224                           IEEE80211_STA_DISABLE_160MHZ);
4225
4226         rcu_read_lock();
4227
4228         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4229             sband->ht_cap.ht_supported) {
4230                 const u8 *ht_oper_ie, *ht_cap_ie;
4231
4232                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4233                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4234                         ht_oper = (void *)(ht_oper_ie + 2);
4235
4236                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4237                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4238                         ht_cap = (void *)(ht_cap_ie + 2);
4239
4240                 if (!ht_cap) {
4241                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4242                         ht_oper = NULL;
4243                 }
4244         }
4245
4246         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4247             sband->vht_cap.vht_supported) {
4248                 const u8 *vht_oper_ie, *vht_cap;
4249
4250                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4251                                                    WLAN_EID_VHT_OPERATION);
4252                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4253                         vht_oper = (void *)(vht_oper_ie + 2);
4254                 if (vht_oper && !ht_oper) {
4255                         vht_oper = NULL;
4256                         sdata_info(sdata,
4257                                    "AP advertised VHT without HT, disabling both\n");
4258                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4259                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4260                 }
4261
4262                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4263                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4264                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4265                         vht_oper = NULL;
4266                 }
4267         }
4268
4269         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4270         have_80mhz = false;
4271         for (i = 0; i < sband->n_channels; i++) {
4272                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4273                                                 IEEE80211_CHAN_NO_80MHZ))
4274                         continue;
4275
4276                 have_80mhz = true;
4277                 break;
4278         }
4279
4280         if (!have_80mhz)
4281                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4282
4283         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4284                                                      cbss->channel,
4285                                                      ht_cap, ht_oper, vht_oper,
4286                                                      &chandef, false);
4287
4288         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4289                                       local->rx_chains);
4290
4291         rcu_read_unlock();
4292
4293         /* will change later if needed */
4294         sdata->smps_mode = IEEE80211_SMPS_OFF;
4295
4296         mutex_lock(&local->mtx);
4297         /*
4298          * If this fails (possibly due to channel context sharing
4299          * on incompatible channels, e.g. 80+80 and 160 sharing the
4300          * same control channel) try to use a smaller bandwidth.
4301          */
4302         ret = ieee80211_vif_use_channel(sdata, &chandef,
4303                                         IEEE80211_CHANCTX_SHARED);
4304
4305         /* don't downgrade for 5 and 10 MHz channels, though. */
4306         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4307             chandef.width == NL80211_CHAN_WIDTH_10)
4308                 goto out;
4309
4310         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4311                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4312                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4313                                                 IEEE80211_CHANCTX_SHARED);
4314         }
4315  out:
4316         mutex_unlock(&local->mtx);
4317         return ret;
4318 }
4319
4320 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4321                                      struct cfg80211_bss *cbss, bool assoc,
4322                                      bool override)
4323 {
4324         struct ieee80211_local *local = sdata->local;
4325         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4326         struct ieee80211_bss *bss = (void *)cbss->priv;
4327         struct sta_info *new_sta = NULL;
4328         struct ieee80211_supported_band *sband;
4329         bool have_sta = false;
4330         int err;
4331
4332         sband = local->hw.wiphy->bands[cbss->channel->band];
4333
4334         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4335                 return -EINVAL;
4336
4337         if (assoc) {
4338                 rcu_read_lock();
4339                 have_sta = sta_info_get(sdata, cbss->bssid);
4340                 rcu_read_unlock();
4341         }
4342
4343         if (!have_sta) {
4344                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4345                 if (!new_sta)
4346                         return -ENOMEM;
4347         }
4348
4349         if (new_sta || override) {
4350                 err = ieee80211_prep_channel(sdata, cbss);
4351                 if (err) {
4352                         if (new_sta)
4353                                 sta_info_free(local, new_sta);
4354                         return -EINVAL;
4355                 }
4356         }
4357
4358         if (new_sta) {
4359                 u32 rates = 0, basic_rates = 0;
4360                 bool have_higher_than_11mbit;
4361                 int min_rate = INT_MAX, min_rate_index = -1;
4362                 struct ieee80211_chanctx_conf *chanctx_conf;
4363                 const struct cfg80211_bss_ies *ies;
4364                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4365                 u32 rate_flags;
4366
4367                 rcu_read_lock();
4368                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4369                 if (WARN_ON(!chanctx_conf)) {
4370                         rcu_read_unlock();
4371                         sta_info_free(local, new_sta);
4372                         return -EINVAL;
4373                 }
4374                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4375                 rcu_read_unlock();
4376
4377                 ieee80211_get_rates(sband, bss->supp_rates,
4378                                     bss->supp_rates_len,
4379                                     &rates, &basic_rates,
4380                                     &have_higher_than_11mbit,
4381                                     &min_rate, &min_rate_index,
4382                                     shift, rate_flags);
4383
4384                 /*
4385                  * This used to be a workaround for basic rates missing
4386                  * in the association response frame. Now that we no
4387                  * longer use the basic rates from there, it probably
4388                  * doesn't happen any more, but keep the workaround so
4389                  * in case some *other* APs are buggy in different ways
4390                  * we can connect -- with a warning.
4391                  */
4392                 if (!basic_rates && min_rate_index >= 0) {
4393                         sdata_info(sdata,
4394                                    "No basic rates, using min rate instead\n");
4395                         basic_rates = BIT(min_rate_index);
4396                 }
4397
4398                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4399                 sdata->vif.bss_conf.basic_rates = basic_rates;
4400
4401                 /* cf. IEEE 802.11 9.2.12 */
4402                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4403                     have_higher_than_11mbit)
4404                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4405                 else
4406                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4407
4408                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4409
4410                 /* set timing information */
4411                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4412                 rcu_read_lock();
4413                 ies = rcu_dereference(cbss->beacon_ies);
4414                 if (ies) {
4415                         const u8 *tim_ie;
4416
4417                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4418                         sdata->vif.bss_conf.sync_device_ts =
4419                                 bss->device_ts_beacon;
4420                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4421                                                   ies->data, ies->len);
4422                         if (tim_ie && tim_ie[1] >= 2)
4423                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4424                         else
4425                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4426                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4427                                                TIMING_BEACON_ONLY)) {
4428                         ies = rcu_dereference(cbss->proberesp_ies);
4429                         /* must be non-NULL since beacon IEs were NULL */
4430                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4431                         sdata->vif.bss_conf.sync_device_ts =
4432                                 bss->device_ts_presp;
4433                         sdata->vif.bss_conf.sync_dtim_count = 0;
4434                 } else {
4435                         sdata->vif.bss_conf.sync_tsf = 0;
4436                         sdata->vif.bss_conf.sync_device_ts = 0;
4437                         sdata->vif.bss_conf.sync_dtim_count = 0;
4438                 }
4439                 rcu_read_unlock();
4440
4441                 /* tell driver about BSSID, basic rates and timing */
4442                 ieee80211_bss_info_change_notify(sdata,
4443                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4444                         BSS_CHANGED_BEACON_INT);
4445
4446                 if (assoc)
4447                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4448
4449                 err = sta_info_insert(new_sta);
4450                 new_sta = NULL;
4451                 if (err) {
4452                         sdata_info(sdata,
4453                                    "failed to insert STA entry for the AP (error %d)\n",
4454                                    err);
4455                         return err;
4456                 }
4457         } else
4458                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4459
4460         /* Cancel scan to ensure that nothing interferes with connection */
4461         if (local->scanning)
4462                 ieee80211_scan_cancel(local);
4463
4464         return 0;
4465 }
4466
4467 /* config hooks */
4468 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4469                        struct cfg80211_auth_request *req)
4470 {
4471         struct ieee80211_local *local = sdata->local;
4472         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4473         struct ieee80211_mgd_auth_data *auth_data;
4474         u16 auth_alg;
4475         int err;
4476
4477         /* prepare auth data structure */
4478
4479         switch (req->auth_type) {
4480         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4481                 auth_alg = WLAN_AUTH_OPEN;
4482                 break;
4483         case NL80211_AUTHTYPE_SHARED_KEY:
4484                 if (IS_ERR(local->wep_tx_tfm))
4485                         return -EOPNOTSUPP;
4486                 auth_alg = WLAN_AUTH_SHARED_KEY;
4487                 break;
4488         case NL80211_AUTHTYPE_FT:
4489                 auth_alg = WLAN_AUTH_FT;
4490                 break;
4491         case NL80211_AUTHTYPE_NETWORK_EAP:
4492                 auth_alg = WLAN_AUTH_LEAP;
4493                 break;
4494         case NL80211_AUTHTYPE_SAE:
4495                 auth_alg = WLAN_AUTH_SAE;
4496                 break;
4497         case NL80211_AUTHTYPE_FILS_SK:
4498                 auth_alg = WLAN_AUTH_FILS_SK;
4499                 break;
4500         case NL80211_AUTHTYPE_FILS_SK_PFS:
4501                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4502                 break;
4503         case NL80211_AUTHTYPE_FILS_PK:
4504                 auth_alg = WLAN_AUTH_FILS_PK;
4505                 break;
4506         default:
4507                 return -EOPNOTSUPP;
4508         }
4509
4510         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4511                             req->ie_len, GFP_KERNEL);
4512         if (!auth_data)
4513                 return -ENOMEM;
4514
4515         auth_data->bss = req->bss;
4516
4517         if (req->auth_data_len >= 4) {
4518                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4519                         __le16 *pos = (__le16 *) req->auth_data;
4520
4521                         auth_data->sae_trans = le16_to_cpu(pos[0]);
4522                         auth_data->sae_status = le16_to_cpu(pos[1]);
4523                 }
4524                 memcpy(auth_data->data, req->auth_data + 4,
4525                        req->auth_data_len - 4);
4526                 auth_data->data_len += req->auth_data_len - 4;
4527         }
4528
4529         if (req->ie && req->ie_len) {
4530                 memcpy(&auth_data->data[auth_data->data_len],
4531                        req->ie, req->ie_len);
4532                 auth_data->data_len += req->ie_len;
4533         }
4534
4535         if (req->key && req->key_len) {
4536                 auth_data->key_len = req->key_len;
4537                 auth_data->key_idx = req->key_idx;
4538                 memcpy(auth_data->key, req->key, req->key_len);
4539         }
4540
4541         auth_data->algorithm = auth_alg;
4542
4543         /* try to authenticate/probe */
4544
4545         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4546             ifmgd->assoc_data) {
4547                 err = -EBUSY;
4548                 goto err_free;
4549         }
4550
4551         if (ifmgd->auth_data)
4552                 ieee80211_destroy_auth_data(sdata, false);
4553
4554         /* prep auth_data so we don't go into idle on disassoc */
4555         ifmgd->auth_data = auth_data;
4556
4557         if (ifmgd->associated) {
4558                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4559
4560                 sdata_info(sdata,
4561                            "disconnect from AP %pM for new auth to %pM\n",
4562                            ifmgd->associated->bssid, req->bss->bssid);
4563                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4564                                        WLAN_REASON_UNSPECIFIED,
4565                                        false, frame_buf);
4566
4567                 ieee80211_report_disconnect(sdata, frame_buf,
4568                                             sizeof(frame_buf), true,
4569                                             WLAN_REASON_UNSPECIFIED);
4570         }
4571
4572         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4573
4574         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4575         if (err)
4576                 goto err_clear;
4577
4578         err = ieee80211_auth(sdata);
4579         if (err) {
4580                 sta_info_destroy_addr(sdata, req->bss->bssid);
4581                 goto err_clear;
4582         }
4583
4584         /* hold our own reference */
4585         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4586         return 0;
4587
4588  err_clear:
4589         eth_zero_addr(ifmgd->bssid);
4590         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4591         ifmgd->auth_data = NULL;
4592         mutex_lock(&sdata->local->mtx);
4593         ieee80211_vif_release_channel(sdata);
4594         mutex_unlock(&sdata->local->mtx);
4595  err_free:
4596         kfree(auth_data);
4597         return err;
4598 }
4599
4600 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4601                         struct cfg80211_assoc_request *req)
4602 {
4603         struct ieee80211_local *local = sdata->local;
4604         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4605         struct ieee80211_bss *bss = (void *)req->bss->priv;
4606         struct ieee80211_mgd_assoc_data *assoc_data;
4607         const struct cfg80211_bss_ies *beacon_ies;
4608         struct ieee80211_supported_band *sband;
4609         const u8 *ssidie, *ht_ie, *vht_ie;
4610         int i, err;
4611         bool override = false;
4612
4613         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4614         if (!assoc_data)
4615                 return -ENOMEM;
4616
4617         rcu_read_lock();
4618         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4619         if (!ssidie) {
4620                 rcu_read_unlock();
4621                 kfree(assoc_data);
4622                 return -EINVAL;
4623         }
4624         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4625         assoc_data->ssid_len = ssidie[1];
4626         rcu_read_unlock();
4627
4628         if (ifmgd->associated) {
4629                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4630
4631                 sdata_info(sdata,
4632                            "disconnect from AP %pM for new assoc to %pM\n",
4633                            ifmgd->associated->bssid, req->bss->bssid);
4634                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4635                                        WLAN_REASON_UNSPECIFIED,
4636                                        false, frame_buf);
4637
4638                 ieee80211_report_disconnect(sdata, frame_buf,
4639                                             sizeof(frame_buf), true,
4640                                             WLAN_REASON_UNSPECIFIED);
4641         }
4642
4643         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4644                 err = -EBUSY;
4645                 goto err_free;
4646         }
4647
4648         if (ifmgd->assoc_data) {
4649                 err = -EBUSY;
4650                 goto err_free;
4651         }
4652
4653         if (ifmgd->auth_data) {
4654                 bool match;
4655
4656                 /* keep sta info, bssid if matching */
4657                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4658                 ieee80211_destroy_auth_data(sdata, match);
4659         }
4660
4661         /* prepare assoc data */
4662
4663         ifmgd->beacon_crc_valid = false;
4664
4665         assoc_data->wmm = bss->wmm_used &&
4666                           (local->hw.queues >= IEEE80211_NUM_ACS);
4667
4668         /*
4669          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4670          * We still associate in non-HT mode (11a/b/g) if any one of these
4671          * ciphers is configured as pairwise.
4672          * We can set this to true for non-11n hardware, that'll be checked
4673          * separately along with the peer capabilities.
4674          */
4675         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4676                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4677                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4678                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4679                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4680                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4681                         netdev_info(sdata->dev,
4682                                     "disabling HT/VHT due to WEP/TKIP use\n");
4683                 }
4684         }
4685
4686         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4687         sband = local->hw.wiphy->bands[req->bss->channel->band];
4688         if (!sband->ht_cap.ht_supported ||
4689             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4690             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4691                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4692                 if (!bss->wmm_used &&
4693                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4694                         netdev_info(sdata->dev,
4695                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4696         }
4697
4698         /* disable VHT if we don't support it or the AP doesn't use WMM */
4699         if (!sband->vht_cap.vht_supported ||
4700             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4701             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4702                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4703                 if (!bss->wmm_used &&
4704                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4705                         netdev_info(sdata->dev,
4706                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4707         }
4708
4709         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4710         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4711                sizeof(ifmgd->ht_capa_mask));
4712
4713         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4714         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4715                sizeof(ifmgd->vht_capa_mask));
4716
4717         if (req->ie && req->ie_len) {
4718                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4719                 assoc_data->ie_len = req->ie_len;
4720         }
4721
4722         if (req->fils_kek) {
4723                 /* should already be checked in cfg80211 - so warn */
4724                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4725                         err = -EINVAL;
4726                         goto err_free;
4727                 }
4728                 memcpy(assoc_data->fils_kek, req->fils_kek,
4729                        req->fils_kek_len);
4730                 assoc_data->fils_kek_len = req->fils_kek_len;
4731         }
4732
4733         if (req->fils_nonces)
4734                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4735                        2 * FILS_NONCE_LEN);
4736
4737         assoc_data->bss = req->bss;
4738
4739         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4740                 if (ifmgd->powersave)
4741                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4742                 else
4743                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4744         } else
4745                 sdata->smps_mode = ifmgd->req_smps;
4746
4747         assoc_data->capability = req->bss->capability;
4748         assoc_data->supp_rates = bss->supp_rates;
4749         assoc_data->supp_rates_len = bss->supp_rates_len;
4750
4751         rcu_read_lock();
4752         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4753         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4754                 assoc_data->ap_ht_param =
4755                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4756         else
4757                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4758         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4759         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4760                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4761                        sizeof(struct ieee80211_vht_cap));
4762         else
4763                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4764         rcu_read_unlock();
4765
4766         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4767                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4768              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4769                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4770
4771         if (bss->wmm_used && bss->uapsd_supported &&
4772             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4773                 assoc_data->uapsd = true;
4774                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4775         } else {
4776                 assoc_data->uapsd = false;
4777                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4778         }
4779
4780         if (req->prev_bssid)
4781                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4782
4783         if (req->use_mfp) {
4784                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4785                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4786         } else {
4787                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4788                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4789         }
4790
4791         if (req->flags & ASSOC_REQ_USE_RRM)
4792                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4793         else
4794                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4795
4796         if (req->crypto.control_port)
4797                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4798         else
4799                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4800
4801         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4802         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4803         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4804                                                         sdata->vif.type);
4805
4806         /* kick off associate process */
4807
4808         ifmgd->assoc_data = assoc_data;
4809         ifmgd->dtim_period = 0;
4810         ifmgd->have_beacon = false;
4811
4812         /* override HT/VHT configuration only if the AP and we support it */
4813         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4814                 struct ieee80211_sta_ht_cap sta_ht_cap;
4815
4816                 if (req->flags & ASSOC_REQ_DISABLE_HT)
4817                         override = true;
4818
4819                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4820                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4821
4822                 /* check for 40 MHz disable override */
4823                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4824                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4825                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4826                         override = true;
4827
4828                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4829                     req->flags & ASSOC_REQ_DISABLE_VHT)
4830                         override = true;
4831         }
4832
4833         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4834                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4835                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4836         }
4837
4838         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4839                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4840
4841         err = ieee80211_prep_connection(sdata, req->bss, true, override);
4842         if (err)
4843                 goto err_clear;
4844
4845         rcu_read_lock();
4846         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4847
4848         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4849             !beacon_ies) {
4850                 /*
4851                  * Wait up to one beacon interval ...
4852                  * should this be more if we miss one?
4853                  */
4854                 sdata_info(sdata, "waiting for beacon from %pM\n",
4855                            ifmgd->bssid);
4856                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4857                 assoc_data->timeout_started = true;
4858                 assoc_data->need_beacon = true;
4859         } else if (beacon_ies) {
4860                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4861                                                     beacon_ies->data,
4862                                                     beacon_ies->len);
4863                 u8 dtim_count = 0;
4864
4865                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4866                         const struct ieee80211_tim_ie *tim;
4867                         tim = (void *)(tim_ie + 2);
4868                         ifmgd->dtim_period = tim->dtim_period;
4869                         dtim_count = tim->dtim_count;
4870                 }
4871                 ifmgd->have_beacon = true;
4872                 assoc_data->timeout = jiffies;
4873                 assoc_data->timeout_started = true;
4874
4875                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4876                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4877                         sdata->vif.bss_conf.sync_device_ts =
4878                                 bss->device_ts_beacon;
4879                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4880                 }
4881         } else {
4882                 assoc_data->timeout = jiffies;
4883                 assoc_data->timeout_started = true;
4884         }
4885         rcu_read_unlock();
4886
4887         run_again(sdata, assoc_data->timeout);
4888
4889         if (bss->corrupt_data) {
4890                 char *corrupt_type = "data";
4891                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4892                         if (bss->corrupt_data &
4893                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4894                                 corrupt_type = "beacon and probe response";
4895                         else
4896                                 corrupt_type = "beacon";
4897                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4898                         corrupt_type = "probe response";
4899                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4900                            corrupt_type);
4901         }
4902
4903         return 0;
4904  err_clear:
4905         eth_zero_addr(ifmgd->bssid);
4906         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4907         ifmgd->assoc_data = NULL;
4908  err_free:
4909         kfree(assoc_data);
4910         return err;
4911 }
4912
4913 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4914                          struct cfg80211_deauth_request *req)
4915 {
4916         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4917         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4918         bool tx = !req->local_state_change;
4919
4920         if (ifmgd->auth_data &&
4921             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4922                 sdata_info(sdata,
4923                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4924                            req->bssid, req->reason_code,
4925                            ieee80211_get_reason_code_string(req->reason_code));
4926
4927                 drv_mgd_prepare_tx(sdata->local, sdata);
4928                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4929                                                IEEE80211_STYPE_DEAUTH,
4930                                                req->reason_code, tx,
4931                                                frame_buf);
4932                 ieee80211_destroy_auth_data(sdata, false);
4933                 ieee80211_report_disconnect(sdata, frame_buf,
4934                                             sizeof(frame_buf), true,
4935                                             req->reason_code);
4936
4937                 return 0;
4938         }
4939
4940         if (ifmgd->assoc_data &&
4941             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4942                 sdata_info(sdata,
4943                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
4944                            req->bssid, req->reason_code,
4945                            ieee80211_get_reason_code_string(req->reason_code));
4946
4947                 drv_mgd_prepare_tx(sdata->local, sdata);
4948                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4949                                                IEEE80211_STYPE_DEAUTH,
4950                                                req->reason_code, tx,
4951                                                frame_buf);
4952                 ieee80211_destroy_assoc_data(sdata, false);
4953                 ieee80211_report_disconnect(sdata, frame_buf,
4954                                             sizeof(frame_buf), true,
4955                                             req->reason_code);
4956                 return 0;
4957         }
4958
4959         if (ifmgd->associated &&
4960             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4961                 sdata_info(sdata,
4962                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4963                            req->bssid, req->reason_code,
4964                            ieee80211_get_reason_code_string(req->reason_code));
4965
4966                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4967                                        req->reason_code, tx, frame_buf);
4968                 ieee80211_report_disconnect(sdata, frame_buf,
4969                                             sizeof(frame_buf), true,
4970                                             req->reason_code);
4971                 return 0;
4972         }
4973
4974         return -ENOTCONN;
4975 }
4976
4977 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4978                            struct cfg80211_disassoc_request *req)
4979 {
4980         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4981         u8 bssid[ETH_ALEN];
4982         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4983
4984         /*
4985          * cfg80211 should catch this ... but it's racy since
4986          * we can receive a disassoc frame, process it, hand it
4987          * to cfg80211 while that's in a locked section already
4988          * trying to tell us that the user wants to disconnect.
4989          */
4990         if (ifmgd->associated != req->bss)
4991                 return -ENOLINK;
4992
4993         sdata_info(sdata,
4994                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
4995                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4996
4997         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4998         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4999                                req->reason_code, !req->local_state_change,
5000                                frame_buf);
5001
5002         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5003                                     req->reason_code);
5004
5005         return 0;
5006 }
5007
5008 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5009 {
5010         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5011
5012         /*
5013          * Make sure some work items will not run after this,
5014          * they will not do anything but might not have been
5015          * cancelled when disconnecting.
5016          */
5017         cancel_work_sync(&ifmgd->monitor_work);
5018         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5019         cancel_work_sync(&ifmgd->request_smps_work);
5020         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5021         cancel_work_sync(&ifmgd->chswitch_work);
5022         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5023
5024         sdata_lock(sdata);
5025         if (ifmgd->assoc_data) {
5026                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5027                 ieee80211_destroy_assoc_data(sdata, false);
5028                 cfg80211_assoc_timeout(sdata->dev, bss);
5029         }
5030         if (ifmgd->auth_data)
5031                 ieee80211_destroy_auth_data(sdata, false);
5032         spin_lock_bh(&ifmgd->teardown_lock);
5033         if (ifmgd->teardown_skb) {
5034                 kfree_skb(ifmgd->teardown_skb);
5035                 ifmgd->teardown_skb = NULL;
5036                 ifmgd->orig_teardown_skb = NULL;
5037         }
5038         spin_unlock_bh(&ifmgd->teardown_lock);
5039         del_timer_sync(&ifmgd->timer);
5040         sdata_unlock(sdata);
5041 }
5042
5043 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5044                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5045                                gfp_t gfp)
5046 {
5047         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5048
5049         trace_api_cqm_rssi_notify(sdata, rssi_event);
5050
5051         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5052 }
5053 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5054
5055 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5056 {
5057         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5058
5059         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5060
5061         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5062 }
5063 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);