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
  34 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  35 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  36 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  37 #define IEEE80211_AUTH_MAX_TRIES        3
  38 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  39 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  40 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  41 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  42 #define IEEE80211_ASSOC_MAX_TRIES       3
  43
  44 static int max_nullfunc_tries = 2;
  45 module_param(max_nullfunc_tries, int, 0644);
  46 MODULE_PARM_DESC(max_nullfunc_tries,
  47                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  48
  49 static int max_probe_tries = 5;
  50 module_param(max_probe_tries, int, 0644);
  51 MODULE_PARM_DESC(max_probe_tries,
  52                  "Maximum probe tries before disconnecting (reason 4).");
  53
  54 /*
  55  * Beacon loss timeout is calculated as N frames times the
  56  * advertised beacon interval.  This may need to be somewhat
  57  * higher than what hardware might detect to account for
  58  * delays in the host processing frames. But since we also
  59  * probe on beacon miss before declaring the connection lost
  60  * default to what we want.
  61  */
  62 static int beacon_loss_count = 7;
  63 module_param(beacon_loss_count, int, 0644);
  64 MODULE_PARM_DESC(beacon_loss_count,
  65                  "Number of beacon intervals before we decide beacon was lost.");
  66
  67 /*
  68  * Time the connection can be idle before we probe
  69  * it to see if we can still talk to the AP.
  70  */
  71 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  72 /*
  73  * Time we wait for a probe response after sending
  74  * a probe request because of beacon loss or for
  75  * checking the connection still works.
  76  */
  77 static int probe_wait_ms = 500;
  78 module_param(probe_wait_ms, int, 0644);
  79 MODULE_PARM_DESC(probe_wait_ms,
  80                  "Maximum time(ms) to wait for probe response"
  81                  " before disconnecting (reason 4).");
  82
  83 /*
  84  * How many Beacon frames need to have been used in average signal strength
  85  * before starting to indicate signal change events.
  86  */
  87 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  88
  89 /*
  90  * We can have multiple work items (and connection probing)
  91  * scheduling this timer, but we need to take care to only
  92  * reschedule it when it should fire _earlier_ than it was
  93  * asked for before, or if it's not pending right now. This
  94  * function ensures that. Note that it then is required to
  95  * run this function for all timeouts after the first one
  96  * has happened -- the work that runs from this timer will
  97  * do that.
  98  */
  99 static void run_again(struct ieee80211_sub_if_data *sdata,
 100                       unsigned long timeout)
 101 {
 102         sdata_assert_lock(sdata);
 103
 104         if (!timer_pending(&sdata->u.mgd.timer) ||
 105             time_before(timeout, sdata->u.mgd.timer.expires))
 106                 mod_timer(&sdata->u.mgd.timer, timeout);
 107 }
 108
 109 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 110 {
 111         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 112                 return;
 113
 114         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 115                 return;
 116
 117         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 118                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 119 }
 120
 121 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 122 {
 123         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 124
 125         if (unlikely(!sdata->u.mgd.associated))
 126                 return;
 127
 128         ifmgd->probe_send_count = 0;
 129
 130         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 131                 return;
 132
 133         mod_timer(&sdata->u.mgd.conn_mon_timer,
 134                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 135 }
 136
 137 static int ecw2cw(int ecw)
 138 {
 139         return (1 << ecw) - 1;
 140 }
 141
 142 static u32
 143 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 144                              struct ieee80211_supported_band *sband,
 145                              struct ieee80211_channel *channel,
 146                              const struct ieee80211_ht_cap *ht_cap,
 147                              const struct ieee80211_ht_operation *ht_oper,
 148                              const struct ieee80211_vht_operation *vht_oper,
 149                              struct cfg80211_chan_def *chandef, bool tracking)
 150 {
 151         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 152         struct cfg80211_chan_def vht_chandef;
 153         struct ieee80211_sta_ht_cap sta_ht_cap;
 154         u32 ht_cfreq, ret;
 155
 156         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 157         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 158
 159         chandef->chan = channel;
 160         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 161         chandef->center_freq1 = channel->center_freq;
 162         chandef->center_freq2 = 0;
 163
 164         if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
 165                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 166                 goto out;
 167         }
 168
 169         chandef->width = NL80211_CHAN_WIDTH_20;
 170
 171         if (!(ht_cap->cap_info &
 172               cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
 173                 ret = IEEE80211_STA_DISABLE_40MHZ;
 174                 vht_chandef = *chandef;
 175                 goto out;
 176         }
 177
 178         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 179                                                   channel->band);
 180         /* check that channel matches the right operating channel */
 181         if (!tracking && channel->center_freq != ht_cfreq) {
 182                 /*
 183                  * It's possible that some APs are confused here;
 184                  * Netgear WNDR3700 sometimes reports 4 higher than
 185                  * the actual channel in association responses, but
 186                  * since we look at probe response/beacon data here
 187                  * it should be OK.
 188                  */
 189                 sdata_info(sdata,
 190                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 191                            channel->center_freq, ht_cfreq,
 192                            ht_oper->primary_chan, channel->band);
 193                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 194                 goto out;
 195         }
 196
 197         /* check 40 MHz support, if we have it */
 198         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 199                 ieee80211_chandef_ht_oper(ht_oper, chandef);
 200         } else {
 201                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 202                 ret = IEEE80211_STA_DISABLE_VHT;
 203                 /* also mark 40 MHz disabled */
 204                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 205                 goto out;
 206         }
 207
 208         if (!vht_oper || !sband->vht_cap.vht_supported) {
 209                 ret = IEEE80211_STA_DISABLE_VHT;
 210                 goto out;
 211         }
 212
 213         vht_chandef = *chandef;
 214         if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
 215                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 216                         sdata_info(sdata,
 217                                    "AP VHT information is invalid, disable VHT\n");
 218                 ret = IEEE80211_STA_DISABLE_VHT;
 219                 goto out;
 220         }
 221
 222         if (!cfg80211_chandef_valid(&vht_chandef)) {
 223                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 224                         sdata_info(sdata,
 225                                    "AP VHT information is invalid, disable VHT\n");
 226                 ret = IEEE80211_STA_DISABLE_VHT;
 227                 goto out;
 228         }
 229
 230         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 231                 ret = 0;
 232                 goto out;
 233         }
 234
 235         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 236                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 237                         sdata_info(sdata,
 238                                    "AP VHT information doesn't match HT, disable VHT\n");
 239                 ret = IEEE80211_STA_DISABLE_VHT;
 240                 goto out;
 241         }
 242
 243         *chandef = vht_chandef;
 244
 245         ret = 0;
 246
 247 out:
 248         /*
 249          * When tracking the current AP, don't do any further checks if the
 250          * new chandef is identical to the one we're currently using for the
 251          * connection. This keeps us from playing ping-pong with regulatory,
 252          * without it the following can happen (for example):
 253          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 254          *  - AP advertises regdom US
 255          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 256          *  - the code below detects an unsupported channel, downgrades, and
 257          *    we disconnect from the AP in the caller
 258          *  - disconnect causes CRDA to reload world regdomain and the game
 259          *    starts anew.
 260          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 261          *
 262          * It seems possible that there are still scenarios with CSA or real
 263          * bandwidth changes where a this could happen, but those cases are
 264          * less common and wouldn't completely prevent using the AP.
 265          */
 266         if (tracking &&
 267             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 268                 return ret;
 269
 270         /* don't print the message below for VHT mismatch if VHT is disabled */
 271         if (ret & IEEE80211_STA_DISABLE_VHT)
 272                 vht_chandef = *chandef;
 273
 274         /*
 275          * Ignore the DISABLED flag when we're already connected and only
 276          * tracking the APs beacon for bandwidth changes - otherwise we
 277          * might get disconnected here if we connect to an AP, update our
 278          * regulatory information based on the AP's country IE and the
 279          * information we have is wrong/outdated and disables the channel
 280          * that we're actually using for the connection to the AP.
 281          */
 282         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 283                                         tracking ? 0 :
 284                                                    IEEE80211_CHAN_DISABLED)) {
 285                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 286                         ret = IEEE80211_STA_DISABLE_HT |
 287                               IEEE80211_STA_DISABLE_VHT;
 288                         break;
 289                 }
 290
 291                 ret |= ieee80211_chandef_downgrade(chandef);
 292         }
 293
 294         if (chandef->width != vht_chandef.width && !tracking)
 295                 sdata_info(sdata,
 296                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 297
 298         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 299         return ret;
 300 }
 301
 302 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 303                                struct sta_info *sta,
 304                                const struct ieee80211_ht_cap *ht_cap,
 305                                const struct ieee80211_ht_operation *ht_oper,
 306                                const struct ieee80211_vht_operation *vht_oper,
 307                                const u8 *bssid, u32 *changed)
 308 {
 309         struct ieee80211_local *local = sdata->local;
 310         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 311         struct ieee80211_supported_band *sband;
 312         struct ieee80211_channel *chan;
 313         struct cfg80211_chan_def chandef;
 314         u16 ht_opmode;
 315         u32 flags;
 316         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 317         int ret;
 318
 319         /* if HT was/is disabled, don't track any bandwidth changes */
 320         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 321                 return 0;
 322
 323         /* don't check VHT if we associated as non-VHT station */
 324         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 325                 vht_oper = NULL;
 326
 327         if (WARN_ON_ONCE(!sta))
 328                 return -EINVAL;
 329
 330         /*
 331          * if bss configuration changed store the new one -
 332          * this may be applicable even if channel is identical
 333          */
 334         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 335         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 336                 *changed |= BSS_CHANGED_HT;
 337                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 338         }
 339
 340         chan = sdata->vif.bss_conf.chandef.chan;
 341         sband = local->hw.wiphy->bands[chan->band];
 342
 343         /* calculate new channel (type) based on HT/VHT operation IEs */
 344         flags = ieee80211_determine_chantype(sdata, sband, chan,
 345                                              ht_cap, ht_oper, vht_oper,
 346                                              &chandef, true);
 347
 348         /*
 349          * Downgrade the new channel if we associated with restricted
 350          * capabilities. For example, if we associated as a 20 MHz STA
 351          * to a 40 MHz AP (due to regulatory, capabilities or config
 352          * reasons) then switching to a 40 MHz channel now won't do us
 353          * any good -- we couldn't use it with the AP.
 354          */
 355         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 356             chandef.width == NL80211_CHAN_WIDTH_80P80)
 357                 flags |= ieee80211_chandef_downgrade(&chandef);
 358         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 359             chandef.width == NL80211_CHAN_WIDTH_160)
 360                 flags |= ieee80211_chandef_downgrade(&chandef);
 361         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 362             chandef.width > NL80211_CHAN_WIDTH_20)
 363                 flags |= ieee80211_chandef_downgrade(&chandef);
 364
 365         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 366                 return 0;
 367
 368         sdata_info(sdata,
 369                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 370                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 371                    chandef.center_freq1, chandef.center_freq2);
 372
 373         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 374                                       IEEE80211_STA_DISABLE_VHT |
 375                                       IEEE80211_STA_DISABLE_40MHZ |
 376                                       IEEE80211_STA_DISABLE_80P80MHZ |
 377                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 378             !cfg80211_chandef_valid(&chandef)) {
 379                 sdata_info(sdata,
 380                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 381                            ifmgd->bssid);
 382                 return -EINVAL;
 383         }
 384
 385         switch (chandef.width) {
 386         case NL80211_CHAN_WIDTH_20_NOHT:
 387         case NL80211_CHAN_WIDTH_20:
 388                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 389                 break;
 390         case NL80211_CHAN_WIDTH_40:
 391                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 392                 break;
 393         case NL80211_CHAN_WIDTH_80:
 394                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 395                 break;
 396         case NL80211_CHAN_WIDTH_80P80:
 397         case NL80211_CHAN_WIDTH_160:
 398                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 399                 break;
 400         default:
 401                 return -EINVAL;
 402         }
 403
 404         if (new_sta_bw > sta->cur_max_bandwidth)
 405                 new_sta_bw = sta->cur_max_bandwidth;
 406
 407         if (new_sta_bw < sta->sta.bandwidth) {
 408                 sta->sta.bandwidth = new_sta_bw;
 409                 rate_control_rate_update(local, sband, sta,
 410                                          IEEE80211_RC_BW_CHANGED);
 411         }
 412
 413         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 414         if (ret) {
 415                 sdata_info(sdata,
 416                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 417                            ifmgd->bssid);
 418                 return ret;
 419         }
 420
 421         if (new_sta_bw > sta->sta.bandwidth) {
 422                 sta->sta.bandwidth = new_sta_bw;
 423                 rate_control_rate_update(local, sband, sta,
 424                                          IEEE80211_RC_BW_CHANGED);
 425         }
 426
 427         return 0;
 428 }
 429
 430 /* frame sending functions */
 431
 432 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 433                                 struct sk_buff *skb, u8 ap_ht_param,
 434                                 struct ieee80211_supported_band *sband,
 435                                 struct ieee80211_channel *channel,
 436                                 enum ieee80211_smps_mode smps)
 437 {
 438         u8 *pos;
 439         u32 flags = channel->flags;
 440         u16 cap;
 441         struct ieee80211_sta_ht_cap ht_cap;
 442
 443         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 444
 445         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 446         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 447
 448         /* determine capability flags */
 449         cap = ht_cap.cap;
 450
 451         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 452         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 453                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 454                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 455                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 456                 }
 457                 break;
 458         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 459                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 460                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 461                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 462                 }
 463                 break;
 464         }
 465
 466         /*
 467          * If 40 MHz was disabled associate as though we weren't
 468          * capable of 40 MHz -- some broken APs will never fall
 469          * back to trying to transmit in 20 MHz.
 470          */
 471         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 472                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 473                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 474         }
 475
 476         /* set SM PS mode properly */
 477         cap &= ~IEEE80211_HT_CAP_SM_PS;
 478         switch (smps) {
 479         case IEEE80211_SMPS_AUTOMATIC:
 480         case IEEE80211_SMPS_NUM_MODES:
 481                 WARN_ON(1);
 482         case IEEE80211_SMPS_OFF:
 483                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 484                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 485                 break;
 486         case IEEE80211_SMPS_STATIC:
 487                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 488                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 489                 break;
 490         case IEEE80211_SMPS_DYNAMIC:
 491                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 492                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 493                 break;
 494         }
 495
 496         /* reserve and fill IE */
 497         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 498         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 499 }
 500
 501 /* This function determines vht capability flags for the association
 502  * and builds the IE.
 503  * Note - the function may set the owner of the MU-MIMO capability
 504  */
 505 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 506                                  struct sk_buff *skb,
 507                                  struct ieee80211_supported_band *sband,
 508                                  struct ieee80211_vht_cap *ap_vht_cap)
 509 {
 510         struct ieee80211_local *local = sdata->local;
 511         u8 *pos;
 512         u32 cap;
 513         struct ieee80211_sta_vht_cap vht_cap;
 514         u32 mask, ap_bf_sts, our_bf_sts;
 515
 516         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 517
 518         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 519         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 520
 521         /* determine capability flags */
 522         cap = vht_cap.cap;
 523
 524         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 525                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 526
 527                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 528                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 529                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 530                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 531         }
 532
 533         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 534                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 535                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 536         }
 537
 538         /*
 539          * Some APs apparently get confused if our capabilities are better
 540          * than theirs, so restrict what we advertise in the assoc request.
 541          */
 542         if (!(ap_vht_cap->vht_cap_info &
 543                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 544                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 545                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 546         else if (!(ap_vht_cap->vht_cap_info &
 547                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 548                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 549
 550         /*
 551          * If some other vif is using the MU-MIMO capablity we cannot associate
 552          * using MU-MIMO - this will lead to contradictions in the group-id
 553          * mechanism.
 554          * Ownership is defined since association request, in order to avoid
 555          * simultaneous associations with MU-MIMO.
 556          */
 557         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 558                 bool disable_mu_mimo = false;
 559                 struct ieee80211_sub_if_data *other;
 560
 561                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 562                         if (other->vif.mu_mimo_owner) {
 563                                 disable_mu_mimo = true;
 564                                 break;
 565                         }
 566                 }
 567                 if (disable_mu_mimo)
 568                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 569                 else
 570                         sdata->vif.mu_mimo_owner = true;
 571         }
 572
 573         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 574
 575         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 576         our_bf_sts = cap & mask;
 577
 578         if (ap_bf_sts < our_bf_sts) {
 579                 cap &= ~mask;
 580                 cap |= ap_bf_sts;
 581         }
 582
 583         /* reserve and fill IE */
 584         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 585         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 586 }
 587
 588 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 589 {
 590         struct ieee80211_local *local = sdata->local;
 591         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 592         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 593         struct sk_buff *skb;
 594         struct ieee80211_mgmt *mgmt;
 595         u8 *pos, qos_info;
 596         size_t offset = 0, noffset;
 597         int i, count, rates_len, supp_rates_len, shift;
 598         u16 capab;
 599         struct ieee80211_supported_band *sband;
 600         struct ieee80211_chanctx_conf *chanctx_conf;
 601         struct ieee80211_channel *chan;
 602         u32 rate_flags, rates = 0;
 603
 604         sdata_assert_lock(sdata);
 605
 606         rcu_read_lock();
 607         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 608         if (WARN_ON(!chanctx_conf)) {
 609                 rcu_read_unlock();
 610                 return;
 611         }
 612         chan = chanctx_conf->def.chan;
 613         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 614         rcu_read_unlock();
 615         sband = local->hw.wiphy->bands[chan->band];
 616         shift = ieee80211_vif_get_shift(&sdata->vif);
 617
 618         if (assoc_data->supp_rates_len) {
 619                 /*
 620                  * Get all rates supported by the device and the AP as
 621                  * some APs don't like getting a superset of their rates
 622                  * in the association request (e.g. D-Link DAP 1353 in
 623                  * b-only mode)...
 624                  */
 625                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 626                                                      assoc_data->supp_rates,
 627                                                      assoc_data->supp_rates_len,
 628                                                      &rates);
 629         } else {
 630                 /*
 631                  * In case AP not provide any supported rates information
 632                  * before association, we send information element(s) with
 633                  * all rates that we support.
 634                  */
 635                 rates_len = 0;
 636                 for (i = 0; i < sband->n_bitrates; i++) {
 637                         if ((rate_flags & sband->bitrates[i].flags)
 638                             != rate_flags)
 639                                 continue;
 640                         rates |= BIT(i);
 641                         rates_len++;
 642                 }
 643         }
 644
 645         skb = alloc_skb(local->hw.extra_tx_headroom +
 646                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 647                         2 + assoc_data->ssid_len + /* SSID */
 648                         4 + rates_len + /* (extended) rates */
 649                         4 + /* power capability */
 650                         2 + 2 * sband->n_channels + /* supported channels */
 651                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 652                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 653                         assoc_data->ie_len + /* extra IEs */
 654                         9, /* WMM */
 655                         GFP_KERNEL);
 656         if (!skb)
 657                 return;
 658
 659         skb_reserve(skb, local->hw.extra_tx_headroom);
 660
 661         capab = WLAN_CAPABILITY_ESS;
 662
 663         if (sband->band == IEEE80211_BAND_2GHZ) {
 664                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 665                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 666         }
 667
 668         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 669                 capab |= WLAN_CAPABILITY_PRIVACY;
 670
 671         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 672             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 673                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 674
 675         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 676                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 677
 678         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 679         memset(mgmt, 0, 24);
 680         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 681         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 682         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 683
 684         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 685                 skb_put(skb, 10);
 686                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 687                                                   IEEE80211_STYPE_REASSOC_REQ);
 688                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 689                 mgmt->u.reassoc_req.listen_interval =
 690                                 cpu_to_le16(local->hw.conf.listen_interval);
 691                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 692                        ETH_ALEN);
 693         } else {
 694                 skb_put(skb, 4);
 695                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 696                                                   IEEE80211_STYPE_ASSOC_REQ);
 697                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 698                 mgmt->u.assoc_req.listen_interval =
 699                                 cpu_to_le16(local->hw.conf.listen_interval);
 700         }
 701
 702         /* SSID */
 703         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 704         *pos++ = WLAN_EID_SSID;
 705         *pos++ = assoc_data->ssid_len;
 706         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 707
 708         /* add all rates which were marked to be used above */
 709         supp_rates_len = rates_len;
 710         if (supp_rates_len > 8)
 711                 supp_rates_len = 8;
 712
 713         pos = skb_put(skb, supp_rates_len + 2);
 714         *pos++ = WLAN_EID_SUPP_RATES;
 715         *pos++ = supp_rates_len;
 716
 717         count = 0;
 718         for (i = 0; i < sband->n_bitrates; i++) {
 719                 if (BIT(i) & rates) {
 720                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 721                                                 5 * (1 << shift));
 722                         *pos++ = (u8) rate;
 723                         if (++count == 8)
 724                                 break;
 725                 }
 726         }
 727
 728         if (rates_len > count) {
 729                 pos = skb_put(skb, rates_len - count + 2);
 730                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 731                 *pos++ = rates_len - count;
 732
 733                 for (i++; i < sband->n_bitrates; i++) {
 734                         if (BIT(i) & rates) {
 735                                 int rate;
 736                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 737                                                     5 * (1 << shift));
 738                                 *pos++ = (u8) rate;
 739                         }
 740                 }
 741         }
 742
 743         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 744             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 745                 pos = skb_put(skb, 4);
 746                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 747                 *pos++ = 2;
 748                 *pos++ = 0; /* min tx power */
 749                  /* max tx power */
 750                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 751         }
 752
 753         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 754                 /* TODO: get this in reg domain format */
 755                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 756                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 757                 *pos++ = 2 * sband->n_channels;
 758                 for (i = 0; i < sband->n_channels; i++) {
 759                         *pos++ = ieee80211_frequency_to_channel(
 760                                         sband->channels[i].center_freq);
 761                         *pos++ = 1; /* one channel in the subband*/
 762                 }
 763         }
 764
 765         /* if present, add any custom IEs that go before HT */
 766         if (assoc_data->ie_len) {
 767                 static const u8 before_ht[] = {
 768                         WLAN_EID_SSID,
 769                         WLAN_EID_SUPP_RATES,
 770                         WLAN_EID_EXT_SUPP_RATES,
 771                         WLAN_EID_PWR_CAPABILITY,
 772                         WLAN_EID_SUPPORTED_CHANNELS,
 773                         WLAN_EID_RSN,
 774                         WLAN_EID_QOS_CAPA,
 775                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 776                         WLAN_EID_MOBILITY_DOMAIN,
 777                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 778                         WLAN_EID_RIC_DATA,              /* reassoc only */
 779                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 780                 };
 781                 static const u8 after_ric[] = {
 782                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 783                         WLAN_EID_HT_CAPABILITY,
 784                         WLAN_EID_BSS_COEX_2040,
 785                         WLAN_EID_EXT_CAPABILITY,
 786                         WLAN_EID_QOS_TRAFFIC_CAPA,
 787                         WLAN_EID_TIM_BCAST_REQ,
 788                         WLAN_EID_INTERWORKING,
 789                         /* 60GHz doesn't happen right now */
 790                         WLAN_EID_VHT_CAPABILITY,
 791                         WLAN_EID_OPMODE_NOTIF,
 792                 };
 793
 794                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 795                                                  assoc_data->ie_len,
 796                                                  before_ht,
 797                                                  ARRAY_SIZE(before_ht),
 798                                                  after_ric,
 799                                                  ARRAY_SIZE(after_ric),
 800                                                  offset);
 801                 pos = skb_put(skb, noffset - offset);
 802                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 803                 offset = noffset;
 804         }
 805
 806         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 807                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 808                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 809
 810         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 811                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 812                                     sband, chan, sdata->smps_mode);
 813
 814         /* if present, add any custom IEs that go before VHT */
 815         if (assoc_data->ie_len) {
 816                 static const u8 before_vht[] = {
 817                         WLAN_EID_SSID,
 818                         WLAN_EID_SUPP_RATES,
 819                         WLAN_EID_EXT_SUPP_RATES,
 820                         WLAN_EID_PWR_CAPABILITY,
 821                         WLAN_EID_SUPPORTED_CHANNELS,
 822                         WLAN_EID_RSN,
 823                         WLAN_EID_QOS_CAPA,
 824                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 825                         WLAN_EID_MOBILITY_DOMAIN,
 826                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 827                         WLAN_EID_HT_CAPABILITY,
 828                         WLAN_EID_BSS_COEX_2040,
 829                         WLAN_EID_EXT_CAPABILITY,
 830                         WLAN_EID_QOS_TRAFFIC_CAPA,
 831                         WLAN_EID_TIM_BCAST_REQ,
 832                         WLAN_EID_INTERWORKING,
 833                 };
 834
 835                 /* RIC already taken above, so no need to handle here anymore */
 836                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 837                                              before_vht, ARRAY_SIZE(before_vht),
 838                                              offset);
 839                 pos = skb_put(skb, noffset - offset);
 840                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 841                 offset = noffset;
 842         }
 843
 844         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 845                 ieee80211_add_vht_ie(sdata, skb, sband,
 846                                      &assoc_data->ap_vht_cap);
 847
 848         /* if present, add any custom non-vendor IEs that go after HT */
 849         if (assoc_data->ie_len) {
 850                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 851                                                     assoc_data->ie_len,
 852                                                     offset);
 853                 pos = skb_put(skb, noffset - offset);
 854                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 855                 offset = noffset;
 856         }
 857
 858         if (assoc_data->wmm) {
 859                 if (assoc_data->uapsd) {
 860                         qos_info = ifmgd->uapsd_queues;
 861                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 862                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 863                 } else {
 864                         qos_info = 0;
 865                 }
 866
 867                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 868         }
 869
 870         /* add any remaining custom (i.e. vendor specific here) IEs */
 871         if (assoc_data->ie_len) {
 872                 noffset = assoc_data->ie_len;
 873                 pos = skb_put(skb, noffset - offset);
 874                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 875         }
 876
 877         drv_mgd_prepare_tx(local, sdata);
 878
 879         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 880         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 881                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 882                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 883         ieee80211_tx_skb(sdata, skb);
 884 }
 885
 886 void ieee80211_send_pspoll(struct ieee80211_local *local,
 887                            struct ieee80211_sub_if_data *sdata)
 888 {
 889         struct ieee80211_pspoll *pspoll;
 890         struct sk_buff *skb;
 891
 892         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 893         if (!skb)
 894                 return;
 895
 896         pspoll = (struct ieee80211_pspoll *) skb->data;
 897         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 898
 899         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 900         ieee80211_tx_skb(sdata, skb);
 901 }
 902
 903 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 904                              struct ieee80211_sub_if_data *sdata,
 905                              bool powersave)
 906 {
 907         struct sk_buff *skb;
 908         struct ieee80211_hdr_3addr *nullfunc;
 909         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 910
 911         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 912         if (!skb)
 913                 return;
 914
 915         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 916         if (powersave)
 917                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 918
 919         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 920                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 921
 922         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 923                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 924
 925         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 926                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 927
 928         ieee80211_tx_skb(sdata, skb);
 929 }
 930
 931 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 932                                           struct ieee80211_sub_if_data *sdata)
 933 {
 934         struct sk_buff *skb;
 935         struct ieee80211_hdr *nullfunc;
 936         __le16 fc;
 937
 938         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 939                 return;
 940
 941         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 942         if (!skb)
 943                 return;
 944
 945         skb_reserve(skb, local->hw.extra_tx_headroom);
 946
 947         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 948         memset(nullfunc, 0, 30);
 949         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 950                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 951         nullfunc->frame_control = fc;
 952         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 953         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 954         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 955         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 956
 957         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 958         ieee80211_tx_skb(sdata, skb);
 959 }
 960
 961 /* spectrum management related things */
 962 static void ieee80211_chswitch_work(struct work_struct *work)
 963 {
 964         struct ieee80211_sub_if_data *sdata =
 965                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 966         struct ieee80211_local *local = sdata->local;
 967         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 968         int ret;
 969
 970         if (!ieee80211_sdata_running(sdata))
 971                 return;
 972
 973         sdata_lock(sdata);
 974         mutex_lock(&local->mtx);
 975         mutex_lock(&local->chanctx_mtx);
 976
 977         if (!ifmgd->associated)
 978                 goto out;
 979
 980         if (!sdata->vif.csa_active)
 981                 goto out;
 982
 983         /*
 984          * using reservation isn't immediate as it may be deferred until later
 985          * with multi-vif. once reservation is complete it will re-schedule the
 986          * work with no reserved_chanctx so verify chandef to check if it
 987          * completed successfully
 988          */
 989
 990         if (sdata->reserved_chanctx) {
 991                 /*
 992                  * with multi-vif csa driver may call ieee80211_csa_finish()
 993                  * many times while waiting for other interfaces to use their
 994                  * reservations
 995                  */
 996                 if (sdata->reserved_ready)
 997                         goto out;
 998
 999                 ret = ieee80211_vif_use_reserved_context(sdata);
1000                 if (ret) {
1001                         sdata_info(sdata,
1002                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1003                                    ret);
1004                         ieee80211_queue_work(&sdata->local->hw,
1005                                              &ifmgd->csa_connection_drop_work);
1006                         goto out;
1007                 }
1008
1009                 goto out;
1010         }
1011
1012         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1013                                         &sdata->csa_chandef)) {
1014                 sdata_info(sdata,
1015                            "failed to finalize channel switch, disconnecting\n");
1016                 ieee80211_queue_work(&sdata->local->hw,
1017                                      &ifmgd->csa_connection_drop_work);
1018                 goto out;
1019         }
1020
1021         /* XXX: shouldn't really modify cfg80211-owned data! */
1022         ifmgd->associated->channel = sdata->csa_chandef.chan;
1023
1024         ifmgd->csa_waiting_bcn = true;
1025
1026         ieee80211_sta_reset_beacon_monitor(sdata);
1027         ieee80211_sta_reset_conn_monitor(sdata);
1028
1029 out:
1030         mutex_unlock(&local->chanctx_mtx);
1031         mutex_unlock(&local->mtx);
1032         sdata_unlock(sdata);
1033 }
1034
1035 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1036 {
1037         struct ieee80211_local *local = sdata->local;
1038         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1039         int ret;
1040
1041         sdata_assert_lock(sdata);
1042
1043         WARN_ON(!sdata->vif.csa_active);
1044
1045         if (sdata->csa_block_tx) {
1046                 ieee80211_wake_vif_queues(local, sdata,
1047                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1048                 sdata->csa_block_tx = false;
1049         }
1050
1051         sdata->vif.csa_active = false;
1052         ifmgd->csa_waiting_bcn = false;
1053
1054         ret = drv_post_channel_switch(sdata);
1055         if (ret) {
1056                 sdata_info(sdata,
1057                            "driver post channel switch failed, disconnecting\n");
1058                 ieee80211_queue_work(&local->hw,
1059                                      &ifmgd->csa_connection_drop_work);
1060                 return;
1061         }
1062
1063         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1064 }
1065
1066 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1067 {
1068         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1069         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1070
1071         trace_api_chswitch_done(sdata, success);
1072         if (!success) {
1073                 sdata_info(sdata,
1074                            "driver channel switch failed, disconnecting\n");
1075                 ieee80211_queue_work(&sdata->local->hw,
1076                                      &ifmgd->csa_connection_drop_work);
1077         } else {
1078                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1079         }
1080 }
1081 EXPORT_SYMBOL(ieee80211_chswitch_done);
1082
1083 static void ieee80211_chswitch_timer(unsigned long data)
1084 {
1085         struct ieee80211_sub_if_data *sdata =
1086                 (struct ieee80211_sub_if_data *) data;
1087
1088         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1089 }
1090
1091 static void
1092 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1093                                  u64 timestamp, u32 device_timestamp,
1094                                  struct ieee802_11_elems *elems,
1095                                  bool beacon)
1096 {
1097         struct ieee80211_local *local = sdata->local;
1098         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1099         struct cfg80211_bss *cbss = ifmgd->associated;
1100         struct ieee80211_chanctx_conf *conf;
1101         struct ieee80211_chanctx *chanctx;
1102         enum ieee80211_band current_band;
1103         struct ieee80211_csa_ie csa_ie;
1104         struct ieee80211_channel_switch ch_switch;
1105         int res;
1106
1107         sdata_assert_lock(sdata);
1108
1109         if (!cbss)
1110                 return;
1111
1112         if (local->scanning)
1113                 return;
1114
1115         /* disregard subsequent announcements if we are already processing */
1116         if (sdata->vif.csa_active)
1117                 return;
1118
1119         current_band = cbss->channel->band;
1120         memset(&csa_ie, 0, sizeof(csa_ie));
1121         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1122                                            ifmgd->flags,
1123                                            ifmgd->associated->bssid, &csa_ie);
1124         if (res < 0)
1125                 ieee80211_queue_work(&local->hw,
1126                                      &ifmgd->csa_connection_drop_work);
1127         if (res)
1128                 return;
1129
1130         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1131                                      IEEE80211_CHAN_DISABLED)) {
1132                 sdata_info(sdata,
1133                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1134                            ifmgd->associated->bssid,
1135                            csa_ie.chandef.chan->center_freq,
1136                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1137                            csa_ie.chandef.center_freq2);
1138                 ieee80211_queue_work(&local->hw,
1139                                      &ifmgd->csa_connection_drop_work);
1140                 return;
1141         }
1142
1143         if (cfg80211_chandef_identical(&csa_ie.chandef,
1144                                        &sdata->vif.bss_conf.chandef)) {
1145                 if (ifmgd->csa_ignored_same_chan)
1146                         return;
1147                 sdata_info(sdata,
1148                            "AP %pM tries to chanswitch to same channel, ignore\n",
1149                            ifmgd->associated->bssid);
1150                 ifmgd->csa_ignored_same_chan = true;
1151                 return;
1152         }
1153
1154         /*
1155          * Drop all TDLS peers - either we disconnect or move to a different
1156          * channel from this point on. There's no telling what our peer will do.
1157          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1158          * have an incompatible wider chandef.
1159          */
1160         ieee80211_teardown_tdls_peers(sdata);
1161
1162         mutex_lock(&local->mtx);
1163         mutex_lock(&local->chanctx_mtx);
1164         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1165                                          lockdep_is_held(&local->chanctx_mtx));
1166         if (!conf) {
1167                 sdata_info(sdata,
1168                            "no channel context assigned to vif?, disconnecting\n");
1169                 goto drop_connection;
1170         }
1171
1172         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1173
1174         if (local->use_chanctx &&
1175             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1176                 sdata_info(sdata,
1177                            "driver doesn't support chan-switch with channel contexts\n");
1178                 goto drop_connection;
1179         }
1180
1181         ch_switch.timestamp = timestamp;
1182         ch_switch.device_timestamp = device_timestamp;
1183         ch_switch.block_tx = csa_ie.mode;
1184         ch_switch.chandef = csa_ie.chandef;
1185         ch_switch.count = csa_ie.count;
1186
1187         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1188                 sdata_info(sdata,
1189                            "preparing for channel switch failed, disconnecting\n");
1190                 goto drop_connection;
1191         }
1192
1193         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1194                                             chanctx->mode, false);
1195         if (res) {
1196                 sdata_info(sdata,
1197                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1198                            res);
1199                 goto drop_connection;
1200         }
1201         mutex_unlock(&local->chanctx_mtx);
1202
1203         sdata->vif.csa_active = true;
1204         sdata->csa_chandef = csa_ie.chandef;
1205         sdata->csa_block_tx = csa_ie.mode;
1206         ifmgd->csa_ignored_same_chan = false;
1207
1208         if (sdata->csa_block_tx)
1209                 ieee80211_stop_vif_queues(local, sdata,
1210                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1211         mutex_unlock(&local->mtx);
1212
1213         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1214                                           csa_ie.count);
1215
1216         if (local->ops->channel_switch) {
1217                 /* use driver's channel switch callback */
1218                 drv_channel_switch(local, sdata, &ch_switch);
1219                 return;
1220         }
1221
1222         /* channel switch handled in software */
1223         if (csa_ie.count <= 1)
1224                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1225         else
1226                 mod_timer(&ifmgd->chswitch_timer,
1227                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1228                                          cbss->beacon_interval));
1229         return;
1230  drop_connection:
1231         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1232         mutex_unlock(&local->chanctx_mtx);
1233         mutex_unlock(&local->mtx);
1234 }
1235
1236 static bool
1237 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1238                                  struct ieee80211_channel *channel,
1239                                  const u8 *country_ie, u8 country_ie_len,
1240                                  const u8 *pwr_constr_elem,
1241                                  int *chan_pwr, int *pwr_reduction)
1242 {
1243         struct ieee80211_country_ie_triplet *triplet;
1244         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1245         int i, chan_increment;
1246         bool have_chan_pwr = false;
1247
1248         /* Invalid IE */
1249         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1250                 return false;
1251
1252         triplet = (void *)(country_ie + 3);
1253         country_ie_len -= 3;
1254
1255         switch (channel->band) {
1256         default:
1257                 WARN_ON_ONCE(1);
1258                 /* fall through */
1259         case IEEE80211_BAND_2GHZ:
1260         case IEEE80211_BAND_60GHZ:
1261                 chan_increment = 1;
1262                 break;
1263         case IEEE80211_BAND_5GHZ:
1264                 chan_increment = 4;
1265                 break;
1266         }
1267
1268         /* find channel */
1269         while (country_ie_len >= 3) {
1270                 u8 first_channel = triplet->chans.first_channel;
1271
1272                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1273                         goto next;
1274
1275                 for (i = 0; i < triplet->chans.num_channels; i++) {
1276                         if (first_channel + i * chan_increment == chan) {
1277                                 have_chan_pwr = true;
1278                                 *chan_pwr = triplet->chans.max_power;
1279                                 break;
1280                         }
1281                 }
1282                 if (have_chan_pwr)
1283                         break;
1284
1285  next:
1286                 triplet++;
1287                 country_ie_len -= 3;
1288         }
1289
1290         if (have_chan_pwr && pwr_constr_elem)
1291                 *pwr_reduction = *pwr_constr_elem;
1292         else
1293                 *pwr_reduction = 0;
1294
1295         return have_chan_pwr;
1296 }
1297
1298 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1299                                       struct ieee80211_channel *channel,
1300                                       const u8 *cisco_dtpc_ie,
1301                                       int *pwr_level)
1302 {
1303         /* From practical testing, the first data byte of the DTPC element
1304          * seems to contain the requested dBm level, and the CLI on Cisco
1305          * APs clearly state the range is -127 to 127 dBm, which indicates
1306          * a signed byte, although it seemingly never actually goes negative.
1307          * The other byte seems to always be zero.
1308          */
1309         *pwr_level = (__s8)cisco_dtpc_ie[4];
1310 }
1311
1312 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1313                                        struct ieee80211_channel *channel,
1314                                        struct ieee80211_mgmt *mgmt,
1315                                        const u8 *country_ie, u8 country_ie_len,
1316                                        const u8 *pwr_constr_ie,
1317                                        const u8 *cisco_dtpc_ie)
1318 {
1319         bool has_80211h_pwr = false, has_cisco_pwr = false;
1320         int chan_pwr = 0, pwr_reduction_80211h = 0;
1321         int pwr_level_cisco, pwr_level_80211h;
1322         int new_ap_level;
1323         __le16 capab = mgmt->u.probe_resp.capab_info;
1324
1325         if (country_ie &&
1326             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1327              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1328                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1329                         sdata, channel, country_ie, country_ie_len,
1330                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1331                 pwr_level_80211h =
1332                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1333         }
1334
1335         if (cisco_dtpc_ie) {
1336                 ieee80211_find_cisco_dtpc(
1337                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1338                 has_cisco_pwr = true;
1339         }
1340
1341         if (!has_80211h_pwr && !has_cisco_pwr)
1342                 return 0;
1343
1344         /* If we have both 802.11h and Cisco DTPC, apply both limits
1345          * by picking the smallest of the two power levels advertised.
1346          */
1347         if (has_80211h_pwr &&
1348             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1349                 new_ap_level = pwr_level_80211h;
1350
1351                 if (sdata->ap_power_level == new_ap_level)
1352                         return 0;
1353
1354                 sdata_dbg(sdata,
1355                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1356                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1357                           sdata->u.mgd.bssid);
1358         } else {  /* has_cisco_pwr is always true here. */
1359                 new_ap_level = pwr_level_cisco;
1360
1361                 if (sdata->ap_power_level == new_ap_level)
1362                         return 0;
1363
1364                 sdata_dbg(sdata,
1365                           "Limiting TX power to %d dBm as advertised by %pM\n",
1366                           pwr_level_cisco, sdata->u.mgd.bssid);
1367         }
1368
1369         sdata->ap_power_level = new_ap_level;
1370         if (__ieee80211_recalc_txpower(sdata))
1371                 return BSS_CHANGED_TXPOWER;
1372         return 0;
1373 }
1374
1375 /* powersave */
1376 static void ieee80211_enable_ps(struct ieee80211_local *local,
1377                                 struct ieee80211_sub_if_data *sdata)
1378 {
1379         struct ieee80211_conf *conf = &local->hw.conf;
1380
1381         /*
1382          * If we are scanning right now then the parameters will
1383          * take effect when scan finishes.
1384          */
1385         if (local->scanning)
1386                 return;
1387
1388         if (conf->dynamic_ps_timeout > 0 &&
1389             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1390                 mod_timer(&local->dynamic_ps_timer, jiffies +
1391                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1392         } else {
1393                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1394                         ieee80211_send_nullfunc(local, sdata, true);
1395
1396                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1397                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1398                         return;
1399
1400                 conf->flags |= IEEE80211_CONF_PS;
1401                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1402         }
1403 }
1404
1405 static void ieee80211_change_ps(struct ieee80211_local *local)
1406 {
1407         struct ieee80211_conf *conf = &local->hw.conf;
1408
1409         if (local->ps_sdata) {
1410                 ieee80211_enable_ps(local, local->ps_sdata);
1411         } else if (conf->flags & IEEE80211_CONF_PS) {
1412                 conf->flags &= ~IEEE80211_CONF_PS;
1413                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1414                 del_timer_sync(&local->dynamic_ps_timer);
1415                 cancel_work_sync(&local->dynamic_ps_enable_work);
1416         }
1417 }
1418
1419 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1420 {
1421         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1422         struct sta_info *sta = NULL;
1423         bool authorized = false;
1424
1425         if (!mgd->powersave)
1426                 return false;
1427
1428         if (mgd->broken_ap)
1429                 return false;
1430
1431         if (!mgd->associated)
1432                 return false;
1433
1434         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1435                 return false;
1436
1437         if (!mgd->have_beacon)
1438                 return false;
1439
1440         rcu_read_lock();
1441         sta = sta_info_get(sdata, mgd->bssid);
1442         if (sta)
1443                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1444         rcu_read_unlock();
1445
1446         return authorized;
1447 }
1448
1449 /* need to hold RTNL or interface lock */
1450 void ieee80211_recalc_ps(struct ieee80211_local *local)
1451 {
1452         struct ieee80211_sub_if_data *sdata, *found = NULL;
1453         int count = 0;
1454         int timeout;
1455
1456         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1457                 local->ps_sdata = NULL;
1458                 return;
1459         }
1460
1461         list_for_each_entry(sdata, &local->interfaces, list) {
1462                 if (!ieee80211_sdata_running(sdata))
1463                         continue;
1464                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1465                         /* If an AP vif is found, then disable PS
1466                          * by setting the count to zero thereby setting
1467                          * ps_sdata to NULL.
1468                          */
1469                         count = 0;
1470                         break;
1471                 }
1472                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1473                         continue;
1474                 found = sdata;
1475                 count++;
1476         }
1477
1478         if (count == 1 && ieee80211_powersave_allowed(found)) {
1479                 u8 dtimper = found->u.mgd.dtim_period;
1480                 s32 beaconint_us;
1481
1482                 beaconint_us = ieee80211_tu_to_usec(
1483                                         found->vif.bss_conf.beacon_int);
1484
1485                 timeout = local->dynamic_ps_forced_timeout;
1486                 if (timeout < 0)
1487                         timeout = 100;
1488                 local->hw.conf.dynamic_ps_timeout = timeout;
1489
1490                 /* If the TIM IE is invalid, pretend the value is 1 */
1491                 if (!dtimper)
1492                         dtimper = 1;
1493
1494                 local->hw.conf.ps_dtim_period = dtimper;
1495                 local->ps_sdata = found;
1496         } else {
1497                 local->ps_sdata = NULL;
1498         }
1499
1500         ieee80211_change_ps(local);
1501 }
1502
1503 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1504 {
1505         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1506
1507         if (sdata->vif.bss_conf.ps != ps_allowed) {
1508                 sdata->vif.bss_conf.ps = ps_allowed;
1509                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1510         }
1511 }
1512
1513 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1514 {
1515         struct ieee80211_local *local =
1516                 container_of(work, struct ieee80211_local,
1517                              dynamic_ps_disable_work);
1518
1519         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1520                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1521                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1522         }
1523
1524         ieee80211_wake_queues_by_reason(&local->hw,
1525                                         IEEE80211_MAX_QUEUE_MAP,
1526                                         IEEE80211_QUEUE_STOP_REASON_PS,
1527                                         false);
1528 }
1529
1530 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1531 {
1532         struct ieee80211_local *local =
1533                 container_of(work, struct ieee80211_local,
1534                              dynamic_ps_enable_work);
1535         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1536         struct ieee80211_if_managed *ifmgd;
1537         unsigned long flags;
1538         int q;
1539
1540         /* can only happen when PS was just disabled anyway */
1541         if (!sdata)
1542                 return;
1543
1544         ifmgd = &sdata->u.mgd;
1545
1546         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1547                 return;
1548
1549         if (local->hw.conf.dynamic_ps_timeout > 0) {
1550                 /* don't enter PS if TX frames are pending */
1551                 if (drv_tx_frames_pending(local)) {
1552                         mod_timer(&local->dynamic_ps_timer, jiffies +
1553                                   msecs_to_jiffies(
1554                                   local->hw.conf.dynamic_ps_timeout));
1555                         return;
1556                 }
1557
1558                 /*
1559                  * transmission can be stopped by others which leads to
1560                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1561                  * is not the actual idle state.
1562                  */
1563                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1564                 for (q = 0; q < local->hw.queues; q++) {
1565                         if (local->queue_stop_reasons[q]) {
1566                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1567                                                        flags);
1568                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1569                                           msecs_to_jiffies(
1570                                           local->hw.conf.dynamic_ps_timeout));
1571                                 return;
1572                         }
1573                 }
1574                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1575         }
1576
1577         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1578             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1579                 if (drv_tx_frames_pending(local)) {
1580                         mod_timer(&local->dynamic_ps_timer, jiffies +
1581                                   msecs_to_jiffies(
1582                                   local->hw.conf.dynamic_ps_timeout));
1583                 } else {
1584                         ieee80211_send_nullfunc(local, sdata, true);
1585                         /* Flush to get the tx status of nullfunc frame */
1586                         ieee80211_flush_queues(local, sdata, false);
1587                 }
1588         }
1589
1590         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1591               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1592             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1593                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1594                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1595                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1596         }
1597 }
1598
1599 void ieee80211_dynamic_ps_timer(unsigned long data)
1600 {
1601         struct ieee80211_local *local = (void *) data;
1602
1603         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1604 }
1605
1606 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1607 {
1608         struct delayed_work *delayed_work = to_delayed_work(work);
1609         struct ieee80211_sub_if_data *sdata =
1610                 container_of(delayed_work, struct ieee80211_sub_if_data,
1611                              dfs_cac_timer_work);
1612         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1613
1614         mutex_lock(&sdata->local->mtx);
1615         if (sdata->wdev.cac_started) {
1616                 ieee80211_vif_release_channel(sdata);
1617                 cfg80211_cac_event(sdata->dev, &chandef,
1618                                    NL80211_RADAR_CAC_FINISHED,
1619                                    GFP_KERNEL);
1620         }
1621         mutex_unlock(&sdata->local->mtx);
1622 }
1623
1624 static bool
1625 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1626 {
1627         struct ieee80211_local *local = sdata->local;
1628         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1629         bool ret = false;
1630         int ac;
1631
1632         if (local->hw.queues < IEEE80211_NUM_ACS)
1633                 return false;
1634
1635         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1636                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1637                 int non_acm_ac;
1638                 unsigned long now = jiffies;
1639
1640                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1641                     tx_tspec->admitted_time &&
1642                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1643                         tx_tspec->consumed_tx_time = 0;
1644                         tx_tspec->time_slice_start = now;
1645
1646                         if (tx_tspec->downgraded)
1647                                 tx_tspec->action =
1648                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1649                 }
1650
1651                 switch (tx_tspec->action) {
1652                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1653                         /* take the original parameters */
1654                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1655                                 sdata_err(sdata,
1656                                           "failed to set TX queue parameters for queue %d\n",
1657                                           ac);
1658                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1659                         tx_tspec->downgraded = false;
1660                         ret = true;
1661                         break;
1662                 case TX_TSPEC_ACTION_DOWNGRADE:
1663                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1664                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1665                                 ret = true;
1666                                 break;
1667                         }
1668                         /* downgrade next lower non-ACM AC */
1669                         for (non_acm_ac = ac + 1;
1670                              non_acm_ac < IEEE80211_NUM_ACS;
1671                              non_acm_ac++)
1672                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1673                                         break;
1674                         /* The loop will result in using BK even if it requires
1675                          * admission control, such configuration makes no sense
1676                          * and we have to transmit somehow - the AC selection
1677                          * does the same thing.
1678                          */
1679                         if (drv_conf_tx(local, sdata, ac,
1680                                         &sdata->tx_conf[non_acm_ac]))
1681                                 sdata_err(sdata,
1682                                           "failed to set TX queue parameters for queue %d\n",
1683                                           ac);
1684                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1685                         ret = true;
1686                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1687                                 tx_tspec->time_slice_start + HZ - now + 1);
1688                         break;
1689                 case TX_TSPEC_ACTION_NONE:
1690                         /* nothing now */
1691                         break;
1692                 }
1693         }
1694
1695         return ret;
1696 }
1697
1698 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1699 {
1700         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1701                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1702 }
1703
1704 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1705 {
1706         struct ieee80211_sub_if_data *sdata;
1707
1708         sdata = container_of(work, struct ieee80211_sub_if_data,
1709                              u.mgd.tx_tspec_wk.work);
1710         ieee80211_sta_handle_tspec_ac_params(sdata);
1711 }
1712
1713 /* MLME */
1714 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1715                                      struct ieee80211_sub_if_data *sdata,
1716                                      const u8 *wmm_param, size_t wmm_param_len)
1717 {
1718         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1719         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1720         size_t left;
1721         int count, ac;
1722         const u8 *pos;
1723         u8 uapsd_queues = 0;
1724
1725         if (!local->ops->conf_tx)
1726                 return false;
1727
1728         if (local->hw.queues < IEEE80211_NUM_ACS)
1729                 return false;
1730
1731         if (!wmm_param)
1732                 return false;
1733
1734         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1735                 return false;
1736
1737         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1738                 uapsd_queues = ifmgd->uapsd_queues;
1739
1740         count = wmm_param[6] & 0x0f;
1741         if (count == ifmgd->wmm_last_param_set)
1742                 return false;
1743         ifmgd->wmm_last_param_set = count;
1744
1745         pos = wmm_param + 8;
1746         left = wmm_param_len - 8;
1747
1748         memset(&params, 0, sizeof(params));
1749
1750         sdata->wmm_acm = 0;
1751         for (; left >= 4; left -= 4, pos += 4) {
1752                 int aci = (pos[0] >> 5) & 0x03;
1753                 int acm = (pos[0] >> 4) & 0x01;
1754                 bool uapsd = false;
1755
1756                 switch (aci) {
1757                 case 1: /* AC_BK */
1758                         ac = IEEE80211_AC_BK;
1759                         if (acm)
1760                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1761                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1762                                 uapsd = true;
1763                         break;
1764                 case 2: /* AC_VI */
1765                         ac = IEEE80211_AC_VI;
1766                         if (acm)
1767                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1768                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1769                                 uapsd = true;
1770                         break;
1771                 case 3: /* AC_VO */
1772                         ac = IEEE80211_AC_VO;
1773                         if (acm)
1774                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1775                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1776                                 uapsd = true;
1777                         break;
1778                 case 0: /* AC_BE */
1779                 default:
1780                         ac = IEEE80211_AC_BE;
1781                         if (acm)
1782                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1783                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1784                                 uapsd = true;
1785                         break;
1786                 }
1787
1788                 params[ac].aifs = pos[0] & 0x0f;
1789
1790                 if (params[ac].aifs < 2) {
1791                         sdata_info(sdata,
1792                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1793                                    params[ac].aifs, aci);
1794                         params[ac].aifs = 2;
1795                 }
1796                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1797                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1798                 params[ac].txop = get_unaligned_le16(pos + 2);
1799                 params[ac].acm = acm;
1800                 params[ac].uapsd = uapsd;
1801
1802                 if (params[ac].cw_min > params[ac].cw_max) {
1803                         sdata_info(sdata,
1804                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1805                                    params[ac].cw_min, params[ac].cw_max, aci);
1806                         return false;
1807                 }
1808         }
1809
1810         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1811                 mlme_dbg(sdata,
1812                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1813                          ac, params[ac].acm,
1814                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1815                          params[ac].txop, params[ac].uapsd,
1816                          ifmgd->tx_tspec[ac].downgraded);
1817                 sdata->tx_conf[ac] = params[ac];
1818                 if (!ifmgd->tx_tspec[ac].downgraded &&
1819                     drv_conf_tx(local, sdata, ac, &params[ac]))
1820                         sdata_err(sdata,
1821                                   "failed to set TX queue parameters for AC %d\n",
1822                                   ac);
1823         }
1824
1825         /* enable WMM or activate new settings */
1826         sdata->vif.bss_conf.qos = true;
1827         return true;
1828 }
1829
1830 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1831 {
1832         lockdep_assert_held(&sdata->local->mtx);
1833
1834         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1835         ieee80211_run_deferred_scan(sdata->local);
1836 }
1837
1838 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1839 {
1840         mutex_lock(&sdata->local->mtx);
1841         __ieee80211_stop_poll(sdata);
1842         mutex_unlock(&sdata->local->mtx);
1843 }
1844
1845 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1846                                            u16 capab, bool erp_valid, u8 erp)
1847 {
1848         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1849         u32 changed = 0;
1850         bool use_protection;
1851         bool use_short_preamble;
1852         bool use_short_slot;
1853
1854         if (erp_valid) {
1855                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1856                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1857         } else {
1858                 use_protection = false;
1859                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1860         }
1861
1862         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1863         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1864                 use_short_slot = true;
1865
1866         if (use_protection != bss_conf->use_cts_prot) {
1867                 bss_conf->use_cts_prot = use_protection;
1868                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1869         }
1870
1871         if (use_short_preamble != bss_conf->use_short_preamble) {
1872                 bss_conf->use_short_preamble = use_short_preamble;
1873                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1874         }
1875
1876         if (use_short_slot != bss_conf->use_short_slot) {
1877                 bss_conf->use_short_slot = use_short_slot;
1878                 changed |= BSS_CHANGED_ERP_SLOT;
1879         }
1880
1881         return changed;
1882 }
1883
1884 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1885                                      struct cfg80211_bss *cbss,
1886                                      u32 bss_info_changed)
1887 {
1888         struct ieee80211_bss *bss = (void *)cbss->priv;
1889         struct ieee80211_local *local = sdata->local;
1890         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1891
1892         bss_info_changed |= BSS_CHANGED_ASSOC;
1893         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1894                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1895
1896         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1897                 beacon_loss_count * bss_conf->beacon_int));
1898
1899         sdata->u.mgd.associated = cbss;
1900         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1901
1902         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1903
1904         if (sdata->vif.p2p ||
1905             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1906                 const struct cfg80211_bss_ies *ies;
1907
1908                 rcu_read_lock();
1909                 ies = rcu_dereference(cbss->ies);
1910                 if (ies) {
1911                         int ret;
1912
1913                         ret = cfg80211_get_p2p_attr(
1914                                         ies->data, ies->len,
1915                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1916                                         (u8 *) &bss_conf->p2p_noa_attr,
1917                                         sizeof(bss_conf->p2p_noa_attr));
1918                         if (ret >= 2) {
1919                                 sdata->u.mgd.p2p_noa_index =
1920                                         bss_conf->p2p_noa_attr.index;
1921                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1922                         }
1923                 }
1924                 rcu_read_unlock();
1925         }
1926
1927         /* just to be sure */
1928         ieee80211_stop_poll(sdata);
1929
1930         ieee80211_led_assoc(local, 1);
1931
1932         if (sdata->u.mgd.have_beacon) {
1933                 /*
1934                  * If the AP is buggy we may get here with no DTIM period
1935                  * known, so assume it's 1 which is the only safe assumption
1936                  * in that case, although if the TIM IE is broken powersave
1937                  * probably just won't work at all.
1938                  */
1939                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1940                 bss_conf->beacon_rate = bss->beacon_rate;
1941                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1942         } else {
1943                 bss_conf->beacon_rate = NULL;
1944                 bss_conf->dtim_period = 0;
1945         }
1946
1947         bss_conf->assoc = 1;
1948
1949         /* Tell the driver to monitor connection quality (if supported) */
1950         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1951             bss_conf->cqm_rssi_thold)
1952                 bss_info_changed |= BSS_CHANGED_CQM;
1953
1954         /* Enable ARP filtering */
1955         if (bss_conf->arp_addr_cnt)
1956                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1957
1958         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1959
1960         mutex_lock(&local->iflist_mtx);
1961         ieee80211_recalc_ps(local);
1962         mutex_unlock(&local->iflist_mtx);
1963
1964         ieee80211_recalc_smps(sdata);
1965         ieee80211_recalc_ps_vif(sdata);
1966
1967         netif_carrier_on(sdata->dev);
1968 }
1969
1970 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1971                                    u16 stype, u16 reason, bool tx,
1972                                    u8 *frame_buf)
1973 {
1974         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1975         struct ieee80211_local *local = sdata->local;
1976         u32 changed = 0;
1977
1978         sdata_assert_lock(sdata);
1979
1980         if (WARN_ON_ONCE(tx && !frame_buf))
1981                 return;
1982
1983         if (WARN_ON(!ifmgd->associated))
1984                 return;
1985
1986         ieee80211_stop_poll(sdata);
1987
1988         ifmgd->associated = NULL;
1989         netif_carrier_off(sdata->dev);
1990
1991         /*
1992          * if we want to get out of ps before disassoc (why?) we have
1993          * to do it before sending disassoc, as otherwise the null-packet
1994          * won't be valid.
1995          */
1996         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1997                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1998                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1999         }
2000         local->ps_sdata = NULL;
2001
2002         /* disable per-vif ps */
2003         ieee80211_recalc_ps_vif(sdata);
2004
2005         /* make sure ongoing transmission finishes */
2006         synchronize_net();
2007
2008         /*
2009          * drop any frame before deauth/disassoc, this can be data or
2010          * management frame. Since we are disconnecting, we should not
2011          * insist sending these frames which can take time and delay
2012          * the disconnection and possible the roaming.
2013          */
2014         if (tx)
2015                 ieee80211_flush_queues(local, sdata, true);
2016
2017         /* deauthenticate/disassociate now */
2018         if (tx || frame_buf)
2019                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2020                                                reason, tx, frame_buf);
2021
2022         /* flush out frame - make sure the deauth was actually sent */
2023         if (tx)
2024                 ieee80211_flush_queues(local, sdata, false);
2025
2026         /* clear bssid only after building the needed mgmt frames */
2027         eth_zero_addr(ifmgd->bssid);
2028
2029         /* remove AP and TDLS peers */
2030         sta_info_flush(sdata);
2031
2032         /* finally reset all BSS / config parameters */
2033         changed |= ieee80211_reset_erp_info(sdata);
2034
2035         ieee80211_led_assoc(local, 0);
2036         changed |= BSS_CHANGED_ASSOC;
2037         sdata->vif.bss_conf.assoc = false;
2038
2039         ifmgd->p2p_noa_index = -1;
2040         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2041                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2042
2043         /* on the next assoc, re-program HT/VHT parameters */
2044         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2045         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2046         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2047         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2048
2049         /* reset MU-MIMO ownership and group data */
2050         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2051                sizeof(sdata->vif.bss_conf.mu_group.membership));
2052         memset(sdata->vif.bss_conf.mu_group.position, 0,
2053                sizeof(sdata->vif.bss_conf.mu_group.position));
2054         changed |= BSS_CHANGED_MU_GROUPS;
2055         sdata->vif.mu_mimo_owner = false;
2056
2057         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2058
2059         del_timer_sync(&local->dynamic_ps_timer);
2060         cancel_work_sync(&local->dynamic_ps_enable_work);
2061
2062         /* Disable ARP filtering */
2063         if (sdata->vif.bss_conf.arp_addr_cnt)
2064                 changed |= BSS_CHANGED_ARP_FILTER;
2065
2066         sdata->vif.bss_conf.qos = false;
2067         changed |= BSS_CHANGED_QOS;
2068
2069         /* The BSSID (not really interesting) and HT changed */
2070         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2071         ieee80211_bss_info_change_notify(sdata, changed);
2072
2073         /* disassociated - set to defaults now */
2074         ieee80211_set_wmm_default(sdata, false, false);
2075
2076         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2077         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2078         del_timer_sync(&sdata->u.mgd.timer);
2079         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2080
2081         sdata->vif.bss_conf.dtim_period = 0;
2082         sdata->vif.bss_conf.beacon_rate = NULL;
2083
2084         ifmgd->have_beacon = false;
2085
2086         ifmgd->flags = 0;
2087         mutex_lock(&local->mtx);
2088         ieee80211_vif_release_channel(sdata);
2089
2090         sdata->vif.csa_active = false;
2091         ifmgd->csa_waiting_bcn = false;
2092         ifmgd->csa_ignored_same_chan = false;
2093         if (sdata->csa_block_tx) {
2094                 ieee80211_wake_vif_queues(local, sdata,
2095                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2096                 sdata->csa_block_tx = false;
2097         }
2098         mutex_unlock(&local->mtx);
2099
2100         /* existing TX TSPEC sessions no longer exist */
2101         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2102         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2103
2104         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2105 }
2106
2107 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2108                              struct ieee80211_hdr *hdr)
2109 {
2110         /*
2111          * We can postpone the mgd.timer whenever receiving unicast frames
2112          * from AP because we know that the connection is working both ways
2113          * at that time. But multicast frames (and hence also beacons) must
2114          * be ignored here, because we need to trigger the timer during
2115          * data idle periods for sending the periodic probe request to the
2116          * AP we're connected to.
2117          */
2118         if (is_multicast_ether_addr(hdr->addr1))
2119                 return;
2120
2121         ieee80211_sta_reset_conn_monitor(sdata);
2122 }
2123
2124 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2125 {
2126         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2127         struct ieee80211_local *local = sdata->local;
2128
2129         mutex_lock(&local->mtx);
2130         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2131                 goto out;
2132
2133         __ieee80211_stop_poll(sdata);
2134
2135         mutex_lock(&local->iflist_mtx);
2136         ieee80211_recalc_ps(local);
2137         mutex_unlock(&local->iflist_mtx);
2138
2139         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2140                 goto out;
2141
2142         /*
2143          * We've received a probe response, but are not sure whether
2144          * we have or will be receiving any beacons or data, so let's
2145          * schedule the timers again, just in case.
2146          */
2147         ieee80211_sta_reset_beacon_monitor(sdata);
2148
2149         mod_timer(&ifmgd->conn_mon_timer,
2150                   round_jiffies_up(jiffies +
2151                                    IEEE80211_CONNECTION_IDLE_TIME));
2152 out:
2153         mutex_unlock(&local->mtx);
2154 }
2155
2156 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2157                                            struct ieee80211_hdr *hdr,
2158                                            u16 tx_time)
2159 {
2160         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2161         u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2162         int ac = ieee80211_ac_from_tid(tid);
2163         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2164         unsigned long now = jiffies;
2165
2166         if (likely(!tx_tspec->admitted_time))
2167                 return;
2168
2169         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2170                 tx_tspec->consumed_tx_time = 0;
2171                 tx_tspec->time_slice_start = now;
2172
2173                 if (tx_tspec->downgraded) {
2174                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2175                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2176                 }
2177         }
2178
2179         if (tx_tspec->downgraded)
2180                 return;
2181
2182         tx_tspec->consumed_tx_time += tx_time;
2183
2184         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2185                 tx_tspec->downgraded = true;
2186                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2187                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2188         }
2189 }
2190
2191 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2192                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2193 {
2194         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2195
2196         if (!ieee80211_is_data(hdr->frame_control))
2197             return;
2198
2199         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2200             sdata->u.mgd.probe_send_count > 0) {
2201                 if (ack)
2202                         ieee80211_sta_reset_conn_monitor(sdata);
2203                 else
2204                         sdata->u.mgd.nullfunc_failed = true;
2205                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2206                 return;
2207         }
2208
2209         if (ack)
2210                 ieee80211_sta_reset_conn_monitor(sdata);
2211 }
2212
2213 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2214 {
2215         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2216         const u8 *ssid;
2217         u8 *dst = ifmgd->associated->bssid;
2218         u8 unicast_limit = max(1, max_probe_tries - 3);
2219
2220         /*
2221          * Try sending broadcast probe requests for the last three
2222          * probe requests after the first ones failed since some
2223          * buggy APs only support broadcast probe requests.
2224          */
2225         if (ifmgd->probe_send_count >= unicast_limit)
2226                 dst = NULL;
2227
2228         /*
2229          * When the hardware reports an accurate Tx ACK status, it's
2230          * better to send a nullfunc frame instead of a probe request,
2231          * as it will kick us off the AP quickly if we aren't associated
2232          * anymore. The timeout will be reset if the frame is ACKed by
2233          * the AP.
2234          */
2235         ifmgd->probe_send_count++;
2236
2237         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2238                 ifmgd->nullfunc_failed = false;
2239                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2240         } else {
2241                 int ssid_len;
2242
2243                 rcu_read_lock();
2244                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2245                 if (WARN_ON_ONCE(ssid == NULL))
2246                         ssid_len = 0;
2247                 else
2248                         ssid_len = ssid[1];
2249
2250                 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2251                                          ssid + 2, ssid_len, NULL,
2252                                          0, (u32) -1, true, 0,
2253                                          ifmgd->associated->channel, false);
2254                 rcu_read_unlock();
2255         }
2256
2257         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2258         run_again(sdata, ifmgd->probe_timeout);
2259 }
2260
2261 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2262                                    bool beacon)
2263 {
2264         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2265         bool already = false;
2266
2267         if (!ieee80211_sdata_running(sdata))
2268                 return;
2269
2270         sdata_lock(sdata);
2271
2272         if (!ifmgd->associated)
2273                 goto out;
2274
2275         mutex_lock(&sdata->local->mtx);
2276
2277         if (sdata->local->tmp_channel || sdata->local->scanning) {
2278                 mutex_unlock(&sdata->local->mtx);
2279                 goto out;
2280         }
2281
2282         if (beacon) {
2283                 mlme_dbg_ratelimited(sdata,
2284                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2285                                      beacon_loss_count);
2286
2287                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2288         }
2289
2290         /*
2291          * The driver/our work has already reported this event or the
2292          * connection monitoring has kicked in and we have already sent
2293          * a probe request. Or maybe the AP died and the driver keeps
2294          * reporting until we disassociate...
2295          *
2296          * In either case we have to ignore the current call to this
2297          * function (except for setting the correct probe reason bit)
2298          * because otherwise we would reset the timer every time and
2299          * never check whether we received a probe response!
2300          */
2301         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2302                 already = true;
2303
2304         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2305
2306         mutex_unlock(&sdata->local->mtx);
2307
2308         if (already)
2309                 goto out;
2310
2311         mutex_lock(&sdata->local->iflist_mtx);
2312         ieee80211_recalc_ps(sdata->local);
2313         mutex_unlock(&sdata->local->iflist_mtx);
2314
2315         ifmgd->probe_send_count = 0;
2316         ieee80211_mgd_probe_ap_send(sdata);
2317  out:
2318         sdata_unlock(sdata);
2319 }
2320
2321 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2322                                           struct ieee80211_vif *vif)
2323 {
2324         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2325         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2326         struct cfg80211_bss *cbss;
2327         struct sk_buff *skb;
2328         const u8 *ssid;
2329         int ssid_len;
2330
2331         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2332                 return NULL;
2333
2334         sdata_assert_lock(sdata);
2335
2336         if (ifmgd->associated)
2337                 cbss = ifmgd->associated;
2338         else if (ifmgd->auth_data)
2339                 cbss = ifmgd->auth_data->bss;
2340         else if (ifmgd->assoc_data)
2341                 cbss = ifmgd->assoc_data->bss;
2342         else
2343                 return NULL;
2344
2345         rcu_read_lock();
2346         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2347         if (WARN_ON_ONCE(ssid == NULL))
2348                 ssid_len = 0;
2349         else
2350                 ssid_len = ssid[1];
2351
2352         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2353                                         (u32) -1, cbss->channel,
2354                                         ssid + 2, ssid_len,
2355                                         NULL, 0, true);
2356         rcu_read_unlock();
2357
2358         return skb;
2359 }
2360 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2361
2362 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2363                                         const u8 *buf, size_t len, bool tx,
2364                                         u16 reason)
2365 {
2366         struct ieee80211_event event = {
2367                 .type = MLME_EVENT,
2368                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2369                 .u.mlme.reason = reason,
2370         };
2371
2372         if (tx)
2373                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2374         else
2375                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2376
2377         drv_event_callback(sdata->local, sdata, &event);
2378 }
2379
2380 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2381 {
2382         struct ieee80211_local *local = sdata->local;
2383         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2384         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2385
2386         sdata_lock(sdata);
2387         if (!ifmgd->associated) {
2388                 sdata_unlock(sdata);
2389                 return;
2390         }
2391
2392         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2393                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2394                                true, frame_buf);
2395         mutex_lock(&local->mtx);
2396         sdata->vif.csa_active = false;
2397         ifmgd->csa_waiting_bcn = false;
2398         if (sdata->csa_block_tx) {
2399                 ieee80211_wake_vif_queues(local, sdata,
2400                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2401                 sdata->csa_block_tx = false;
2402         }
2403         mutex_unlock(&local->mtx);
2404
2405         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2406                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2407
2408         sdata_unlock(sdata);
2409 }
2410
2411 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2412 {
2413         struct ieee80211_sub_if_data *sdata =
2414                 container_of(work, struct ieee80211_sub_if_data,
2415                              u.mgd.beacon_connection_loss_work);
2416         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2417
2418         if (ifmgd->associated)
2419                 ifmgd->beacon_loss_count++;
2420
2421         if (ifmgd->connection_loss) {
2422                 sdata_info(sdata, "Connection to AP %pM lost\n",
2423                            ifmgd->bssid);
2424                 __ieee80211_disconnect(sdata);
2425         } else {
2426                 ieee80211_mgd_probe_ap(sdata, true);
2427         }
2428 }
2429
2430 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2431 {
2432         struct ieee80211_sub_if_data *sdata =
2433                 container_of(work, struct ieee80211_sub_if_data,
2434                              u.mgd.csa_connection_drop_work);
2435
2436         __ieee80211_disconnect(sdata);
2437 }
2438
2439 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2440 {
2441         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2442         struct ieee80211_hw *hw = &sdata->local->hw;
2443
2444         trace_api_beacon_loss(sdata);
2445
2446         sdata->u.mgd.connection_loss = false;
2447         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2448 }
2449 EXPORT_SYMBOL(ieee80211_beacon_loss);
2450
2451 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2452 {
2453         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2454         struct ieee80211_hw *hw = &sdata->local->hw;
2455
2456         trace_api_connection_loss(sdata);
2457
2458         sdata->u.mgd.connection_loss = true;
2459         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2460 }
2461 EXPORT_SYMBOL(ieee80211_connection_loss);
2462
2463
2464 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2465                                         bool assoc)
2466 {
2467         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2468
2469         sdata_assert_lock(sdata);
2470
2471         if (!assoc) {
2472                 /*
2473                  * we are not authenticated yet, the only timer that could be
2474                  * running is the timeout for the authentication response which
2475                  * which is not relevant anymore.
2476                  */
2477                 del_timer_sync(&sdata->u.mgd.timer);
2478                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2479
2480                 eth_zero_addr(sdata->u.mgd.bssid);
2481                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2482                 sdata->u.mgd.flags = 0;
2483                 mutex_lock(&sdata->local->mtx);
2484                 ieee80211_vif_release_channel(sdata);
2485                 mutex_unlock(&sdata->local->mtx);
2486         }
2487
2488         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2489         kfree(auth_data);
2490         sdata->u.mgd.auth_data = NULL;
2491 }
2492
2493 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2494                                          bool assoc)
2495 {
2496         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2497
2498         sdata_assert_lock(sdata);
2499
2500         if (!assoc) {
2501                 /*
2502                  * we are not associated yet, the only timer that could be
2503                  * running is the timeout for the association response which
2504                  * which is not relevant anymore.
2505                  */
2506                 del_timer_sync(&sdata->u.mgd.timer);
2507                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2508
2509                 eth_zero_addr(sdata->u.mgd.bssid);
2510                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2511                 sdata->u.mgd.flags = 0;
2512                 sdata->vif.mu_mimo_owner = false;
2513
2514                 mutex_lock(&sdata->local->mtx);
2515                 ieee80211_vif_release_channel(sdata);
2516                 mutex_unlock(&sdata->local->mtx);
2517         }
2518
2519         kfree(assoc_data);
2520         sdata->u.mgd.assoc_data = NULL;
2521 }
2522
2523 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2524                                      struct ieee80211_mgmt *mgmt, size_t len)
2525 {
2526         struct ieee80211_local *local = sdata->local;
2527         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2528         u8 *pos;
2529         struct ieee802_11_elems elems;
2530         u32 tx_flags = 0;
2531
2532         pos = mgmt->u.auth.variable;
2533         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2534         if (!elems.challenge)
2535                 return;
2536         auth_data->expected_transaction = 4;
2537         drv_mgd_prepare_tx(sdata->local, sdata);
2538         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2539                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2540                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2541         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2542                             elems.challenge - 2, elems.challenge_len + 2,
2543                             auth_data->bss->bssid, auth_data->bss->bssid,
2544                             auth_data->key, auth_data->key_len,
2545                             auth_data->key_idx, tx_flags);
2546 }
2547
2548 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2549                                    struct ieee80211_mgmt *mgmt, size_t len)
2550 {
2551         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2552         u8 bssid[ETH_ALEN];
2553         u16 auth_alg, auth_transaction, status_code;
2554         struct sta_info *sta;
2555         struct ieee80211_event event = {
2556                 .type = MLME_EVENT,
2557                 .u.mlme.data = AUTH_EVENT,
2558         };
2559
2560         sdata_assert_lock(sdata);
2561
2562         if (len < 24 + 6)
2563                 return;
2564
2565         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2566                 return;
2567
2568         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2569
2570         if (!ether_addr_equal(bssid, mgmt->bssid))
2571                 return;
2572
2573         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2574         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2575         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2576
2577         if (auth_alg != ifmgd->auth_data->algorithm ||
2578             auth_transaction != ifmgd->auth_data->expected_transaction) {
2579                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2580                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2581                            auth_transaction,
2582                            ifmgd->auth_data->expected_transaction);
2583                 return;
2584         }
2585
2586         if (status_code != WLAN_STATUS_SUCCESS) {
2587                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2588                            mgmt->sa, status_code);
2589                 ieee80211_destroy_auth_data(sdata, false);
2590                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2591                 event.u.mlme.status = MLME_DENIED;
2592                 event.u.mlme.reason = status_code;
2593                 drv_event_callback(sdata->local, sdata, &event);
2594                 return;
2595         }
2596
2597         switch (ifmgd->auth_data->algorithm) {
2598         case WLAN_AUTH_OPEN:
2599         case WLAN_AUTH_LEAP:
2600         case WLAN_AUTH_FT:
2601         case WLAN_AUTH_SAE:
2602                 break;
2603         case WLAN_AUTH_SHARED_KEY:
2604                 if (ifmgd->auth_data->expected_transaction != 4) {
2605                         ieee80211_auth_challenge(sdata, mgmt, len);
2606                         /* need another frame */
2607                         return;
2608                 }
2609                 break;
2610         default:
2611                 WARN_ONCE(1, "invalid auth alg %d",
2612                           ifmgd->auth_data->algorithm);
2613                 return;
2614         }
2615
2616         event.u.mlme.status = MLME_SUCCESS;
2617         drv_event_callback(sdata->local, sdata, &event);
2618         sdata_info(sdata, "authenticated\n");
2619         ifmgd->auth_data->done = true;
2620         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2621         ifmgd->auth_data->timeout_started = true;
2622         run_again(sdata, ifmgd->auth_data->timeout);
2623
2624         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2625             ifmgd->auth_data->expected_transaction != 2) {
2626                 /*
2627                  * Report auth frame to user space for processing since another
2628                  * round of Authentication frames is still needed.
2629                  */
2630                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2631                 return;
2632         }
2633
2634         /* move station state to auth */
2635         mutex_lock(&sdata->local->sta_mtx);
2636         sta = sta_info_get(sdata, bssid);
2637         if (!sta) {
2638                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2639                 goto out_err;
2640         }
2641         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2642                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2643                 goto out_err;
2644         }
2645         mutex_unlock(&sdata->local->sta_mtx);
2646
2647         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2648         return;
2649  out_err:
2650         mutex_unlock(&sdata->local->sta_mtx);
2651         /* ignore frame -- wait for timeout */
2652 }
2653
2654 #define case_WLAN(type) \
2655         case WLAN_REASON_##type: return #type
2656
2657 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2658 {
2659         switch (reason_code) {
2660         case_WLAN(UNSPECIFIED);
2661         case_WLAN(PREV_AUTH_NOT_VALID);
2662         case_WLAN(DEAUTH_LEAVING);
2663         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2664         case_WLAN(DISASSOC_AP_BUSY);
2665         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2666         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2667         case_WLAN(DISASSOC_STA_HAS_LEFT);
2668         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2669         case_WLAN(DISASSOC_BAD_POWER);
2670         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2671         case_WLAN(INVALID_IE);
2672         case_WLAN(MIC_FAILURE);
2673         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2674         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2675         case_WLAN(IE_DIFFERENT);
2676         case_WLAN(INVALID_GROUP_CIPHER);
2677         case_WLAN(INVALID_PAIRWISE_CIPHER);
2678         case_WLAN(INVALID_AKMP);
2679         case_WLAN(UNSUPP_RSN_VERSION);
2680         case_WLAN(INVALID_RSN_IE_CAP);
2681         case_WLAN(IEEE8021X_FAILED);
2682         case_WLAN(CIPHER_SUITE_REJECTED);
2683         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2684         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2685         case_WLAN(DISASSOC_LOW_ACK);
2686         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2687         case_WLAN(QSTA_LEAVE_QBSS);
2688         case_WLAN(QSTA_NOT_USE);
2689         case_WLAN(QSTA_REQUIRE_SETUP);
2690         case_WLAN(QSTA_TIMEOUT);
2691         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2692         case_WLAN(MESH_PEER_CANCELED);
2693         case_WLAN(MESH_MAX_PEERS);
2694         case_WLAN(MESH_CONFIG);
2695         case_WLAN(MESH_CLOSE);
2696         case_WLAN(MESH_MAX_RETRIES);
2697         case_WLAN(MESH_CONFIRM_TIMEOUT);
2698         case_WLAN(MESH_INVALID_GTK);
2699         case_WLAN(MESH_INCONSISTENT_PARAM);
2700         case_WLAN(MESH_INVALID_SECURITY);
2701         case_WLAN(MESH_PATH_ERROR);
2702         case_WLAN(MESH_PATH_NOFORWARD);
2703         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2704         case_WLAN(MAC_EXISTS_IN_MBSS);
2705         case_WLAN(MESH_CHAN_REGULATORY);
2706         case_WLAN(MESH_CHAN);
2707         default: return "<unknown>";
2708         }
2709 }
2710
2711 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2712                                      struct ieee80211_mgmt *mgmt, size_t len)
2713 {
2714         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2715         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2716
2717         sdata_assert_lock(sdata);
2718
2719         if (len < 24 + 2)
2720                 return;
2721
2722         if (ifmgd->associated &&
2723             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2724                 const u8 *bssid = ifmgd->associated->bssid;
2725
2726                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2727                            bssid, reason_code,
2728                            ieee80211_get_reason_code_string(reason_code));
2729
2730                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2731
2732                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2733                                             reason_code);
2734                 return;
2735         }
2736
2737         if (ifmgd->assoc_data &&
2738             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2739                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2740
2741                 sdata_info(sdata,
2742                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2743                            bssid, reason_code,
2744                            ieee80211_get_reason_code_string(reason_code));
2745
2746                 ieee80211_destroy_assoc_data(sdata, false);
2747
2748                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2749                 return;
2750         }
2751 }
2752
2753
2754 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2755                                        struct ieee80211_mgmt *mgmt, size_t len)
2756 {
2757         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2758         u16 reason_code;
2759
2760         sdata_assert_lock(sdata);
2761
2762         if (len < 24 + 2)
2763                 return;
2764
2765         if (!ifmgd->associated ||
2766             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2767                 return;
2768
2769         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2770
2771         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2772                    mgmt->sa, reason_code);
2773
2774         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2775
2776         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2777 }
2778
2779 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2780                                 u8 *supp_rates, unsigned int supp_rates_len,
2781                                 u32 *rates, u32 *basic_rates,
2782                                 bool *have_higher_than_11mbit,
2783                                 int *min_rate, int *min_rate_index,
2784                                 int shift, u32 rate_flags)
2785 {
2786         int i, j;
2787
2788         for (i = 0; i < supp_rates_len; i++) {
2789                 int rate = supp_rates[i] & 0x7f;
2790                 bool is_basic = !!(supp_rates[i] & 0x80);
2791
2792                 if ((rate * 5 * (1 << shift)) > 110)
2793                         *have_higher_than_11mbit = true;
2794
2795                 /*
2796                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2797                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2798                  *
2799                  * Note: Even through the membership selector and the basic
2800                  *       rate flag share the same bit, they are not exactly
2801                  *       the same.
2802                  */
2803                 if (!!(supp_rates[i] & 0x80) &&
2804                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2805                         continue;
2806
2807                 for (j = 0; j < sband->n_bitrates; j++) {
2808                         struct ieee80211_rate *br;
2809                         int brate;
2810
2811                         br = &sband->bitrates[j];
2812                         if ((rate_flags & br->flags) != rate_flags)
2813                                 continue;
2814
2815                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2816                         if (brate == rate) {
2817                                 *rates |= BIT(j);
2818                                 if (is_basic)
2819                                         *basic_rates |= BIT(j);
2820                                 if ((rate * 5) < *min_rate) {
2821                                         *min_rate = rate * 5;
2822                                         *min_rate_index = j;
2823                                 }
2824                                 break;
2825                         }
2826                 }
2827         }
2828 }
2829
2830 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2831                                     struct cfg80211_bss *cbss,
2832                                     struct ieee80211_mgmt *mgmt, size_t len)
2833 {
2834         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2835         struct ieee80211_local *local = sdata->local;
2836         struct ieee80211_supported_band *sband;
2837         struct sta_info *sta;
2838         u8 *pos;
2839         u16 capab_info, aid;
2840         struct ieee802_11_elems elems;
2841         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2842         const struct cfg80211_bss_ies *bss_ies = NULL;
2843         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2844         u32 changed = 0;
2845         int err;
2846         bool ret;
2847
2848         /* AssocResp and ReassocResp have identical structure */
2849
2850         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2851         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2852
2853         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2854                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2855                            aid);
2856         aid &= ~(BIT(15) | BIT(14));
2857
2858         ifmgd->broken_ap = false;
2859
2860         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2861                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2862                            aid);
2863                 aid = 0;
2864                 ifmgd->broken_ap = true;
2865         }
2866
2867         pos = mgmt->u.assoc_resp.variable;
2868         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2869
2870         if (!elems.supp_rates) {
2871                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2872                 return false;
2873         }
2874
2875         ifmgd->aid = aid;
2876         ifmgd->tdls_chan_switch_prohibited =
2877                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2878                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2879
2880         /*
2881          * Some APs are erroneously not including some information in their
2882          * (re)association response frames. Try to recover by using the data
2883          * from the beacon or probe response. This seems to afflict mobile
2884          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2885          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2886          */
2887         if ((assoc_data->wmm && !elems.wmm_param) ||
2888             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2889              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2890             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2891              (!elems.vht_cap_elem || !elems.vht_operation))) {
2892                 const struct cfg80211_bss_ies *ies;
2893                 struct ieee802_11_elems bss_elems;
2894
2895                 rcu_read_lock();
2896                 ies = rcu_dereference(cbss->ies);
2897                 if (ies)
2898                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2899                                           GFP_ATOMIC);
2900                 rcu_read_unlock();
2901                 if (!bss_ies)
2902                         return false;
2903
2904                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2905                                        false, &bss_elems);
2906                 if (assoc_data->wmm &&
2907                     !elems.wmm_param && bss_elems.wmm_param) {
2908                         elems.wmm_param = bss_elems.wmm_param;
2909                         sdata_info(sdata,
2910                                    "AP bug: WMM param missing from AssocResp\n");
2911                 }
2912
2913                 /*
2914                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2915                  * have to include the IEs in the (re)association response.
2916                  */
2917                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2918                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2919                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2920                         sdata_info(sdata,
2921                                    "AP bug: HT capability missing from AssocResp\n");
2922                 }
2923                 if (!elems.ht_operation && bss_elems.ht_operation &&
2924                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2925                         elems.ht_operation = bss_elems.ht_operation;
2926                         sdata_info(sdata,
2927                                    "AP bug: HT operation missing from AssocResp\n");
2928                 }
2929                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2930                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2931                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2932                         sdata_info(sdata,
2933                                    "AP bug: VHT capa missing from AssocResp\n");
2934                 }
2935                 if (!elems.vht_operation && bss_elems.vht_operation &&
2936                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2937                         elems.vht_operation = bss_elems.vht_operation;
2938                         sdata_info(sdata,
2939                                    "AP bug: VHT operation missing from AssocResp\n");
2940                 }
2941         }
2942
2943         /*
2944          * We previously checked these in the beacon/probe response, so
2945          * they should be present here. This is just a safety net.
2946          */
2947         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2948             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2949                 sdata_info(sdata,
2950                            "HT AP is missing WMM params or HT capability/operation\n");
2951                 ret = false;
2952                 goto out;
2953         }
2954
2955         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2956             (!elems.vht_cap_elem || !elems.vht_operation)) {
2957                 sdata_info(sdata,
2958                            "VHT AP is missing VHT capability/operation\n");
2959                 ret = false;
2960                 goto out;
2961         }
2962
2963         mutex_lock(&sdata->local->sta_mtx);
2964         /*
2965          * station info was already allocated and inserted before
2966          * the association and should be available to us
2967          */
2968         sta = sta_info_get(sdata, cbss->bssid);
2969         if (WARN_ON(!sta)) {
2970                 mutex_unlock(&sdata->local->sta_mtx);
2971                 ret = false;
2972                 goto out;
2973         }
2974
2975         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2976
2977         /* Set up internal HT/VHT capabilities */
2978         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2979                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2980                                                   elems.ht_cap_elem, sta);
2981
2982         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2983                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2984                                                     elems.vht_cap_elem, sta);
2985
2986         /*
2987          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2988          * in their association response, so ignore that data for our own
2989          * configuration. If it changed since the last beacon, we'll get the
2990          * next beacon and update then.
2991          */
2992
2993         /*
2994          * If an operating mode notification IE is present, override the
2995          * NSS calculation (that would be done in rate_control_rate_init())
2996          * and use the # of streams from that element.
2997          */
2998         if (elems.opmode_notif &&
2999             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3000                 u8 nss;
3001
3002                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3003                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3004                 nss += 1;
3005                 sta->sta.rx_nss = nss;
3006         }
3007
3008         rate_control_rate_init(sta);
3009
3010         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3011                 set_sta_flag(sta, WLAN_STA_MFP);
3012                 sta->sta.mfp = true;
3013         } else {
3014                 sta->sta.mfp = false;
3015         }
3016
3017         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3018
3019         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3020         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3021                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3022         if (err) {
3023                 sdata_info(sdata,
3024                            "failed to move station %pM to desired state\n",
3025                            sta->sta.addr);
3026                 WARN_ON(__sta_info_destroy(sta));
3027                 mutex_unlock(&sdata->local->sta_mtx);
3028                 ret = false;
3029                 goto out;
3030         }
3031
3032         mutex_unlock(&sdata->local->sta_mtx);
3033
3034         /*
3035          * Always handle WMM once after association regardless
3036          * of the first value the AP uses. Setting -1 here has
3037          * that effect because the AP values is an unsigned
3038          * 4-bit value.
3039          */
3040         ifmgd->wmm_last_param_set = -1;
3041
3042         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3043                 ieee80211_set_wmm_default(sdata, false, false);
3044         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3045                                              elems.wmm_param_len)) {
3046                 /* still enable QoS since we might have HT/VHT */
3047                 ieee80211_set_wmm_default(sdata, false, true);
3048                 /* set the disable-WMM flag in this case to disable
3049                  * tracking WMM parameter changes in the beacon if
3050                  * the parameters weren't actually valid. Doing so
3051                  * avoids changing parameters very strangely when
3052                  * the AP is going back and forth between valid and
3053                  * invalid parameters.
3054                  */
3055                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3056         }
3057         changed |= BSS_CHANGED_QOS;
3058
3059         /* set AID and assoc capability,
3060          * ieee80211_set_associated() will tell the driver */
3061         bss_conf->aid = aid;
3062         bss_conf->assoc_capability = capab_info;
3063         ieee80211_set_associated(sdata, cbss, changed);
3064
3065         /*
3066          * If we're using 4-addr mode, let the AP know that we're
3067          * doing so, so that it can create the STA VLAN on its side
3068          */
3069         if (ifmgd->use_4addr)
3070                 ieee80211_send_4addr_nullfunc(local, sdata);
3071
3072         /*
3073          * Start timer to probe the connection to the AP now.
3074          * Also start the timer that will detect beacon loss.
3075          */
3076         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3077         ieee80211_sta_reset_beacon_monitor(sdata);
3078
3079         ret = true;
3080  out:
3081         kfree(bss_ies);
3082         return ret;
3083 }
3084
3085 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3086                                          struct ieee80211_mgmt *mgmt,
3087                                          size_t len)
3088 {
3089         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3090         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3091         u16 capab_info, status_code, aid;
3092         struct ieee802_11_elems elems;
3093         int ac, uapsd_queues = -1;
3094         u8 *pos;
3095         bool reassoc;
3096         struct cfg80211_bss *bss;
3097         struct ieee80211_event event = {
3098                 .type = MLME_EVENT,
3099                 .u.mlme.data = ASSOC_EVENT,
3100         };
3101
3102         sdata_assert_lock(sdata);
3103
3104         if (!assoc_data)
3105                 return;
3106         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3107                 return;
3108
3109         /*
3110          * AssocResp and ReassocResp have identical structure, so process both
3111          * of them in this function.
3112          */
3113
3114         if (len < 24 + 6)
3115                 return;
3116
3117         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3118         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3119         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3120         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3121
3122         sdata_info(sdata,
3123                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3124                    reassoc ? "Rea" : "A", mgmt->sa,
3125                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3126
3127         pos = mgmt->u.assoc_resp.variable;
3128         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3129
3130         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3131             elems.timeout_int &&
3132             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3133                 u32 tu, ms;
3134                 tu = le32_to_cpu(elems.timeout_int->value);
3135                 ms = tu * 1024 / 1000;
3136                 sdata_info(sdata,
3137                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3138                            mgmt->sa, tu, ms);
3139                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3140                 assoc_data->timeout_started = true;
3141                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3142                         run_again(sdata, assoc_data->timeout);
3143                 return;
3144         }
3145
3146         bss = assoc_data->bss;
3147
3148         if (status_code != WLAN_STATUS_SUCCESS) {
3149                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3150                            mgmt->sa, status_code);
3151                 ieee80211_destroy_assoc_data(sdata, false);
3152                 event.u.mlme.status = MLME_DENIED;
3153                 event.u.mlme.reason = status_code;
3154                 drv_event_callback(sdata->local, sdata, &event);
3155         } else {
3156                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3157                         /* oops -- internal error -- send timeout for now */
3158                         ieee80211_destroy_assoc_data(sdata, false);
3159                         cfg80211_assoc_timeout(sdata->dev, bss);
3160                         return;
3161                 }
3162                 event.u.mlme.status = MLME_SUCCESS;
3163                 drv_event_callback(sdata->local, sdata, &event);
3164                 sdata_info(sdata, "associated\n");
3165
3166                 /*
3167                  * destroy assoc_data afterwards, as otherwise an idle
3168                  * recalc after assoc_data is NULL but before associated
3169                  * is set can cause the interface to go idle
3170                  */
3171                 ieee80211_destroy_assoc_data(sdata, true);
3172
3173                 /* get uapsd queues configuration */
3174                 uapsd_queues = 0;
3175                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3176                         if (sdata->tx_conf[ac].uapsd)
3177                                 uapsd_queues |= BIT(ac);
3178         }
3179
3180         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3181 }
3182
3183 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3184                                   struct ieee80211_mgmt *mgmt, size_t len,
3185                                   struct ieee80211_rx_status *rx_status,
3186                                   struct ieee802_11_elems *elems)
3187 {
3188         struct ieee80211_local *local = sdata->local;
3189         struct ieee80211_bss *bss;
3190         struct ieee80211_channel *channel;
3191
3192         sdata_assert_lock(sdata);
3193
3194         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3195         if (!channel)
3196                 return;
3197
3198         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3199                                         channel);
3200         if (bss) {
3201                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3202                 ieee80211_rx_bss_put(local, bss);
3203         }
3204 }
3205
3206
3207 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3208                                          struct sk_buff *skb)
3209 {
3210         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3211         struct ieee80211_if_managed *ifmgd;
3212         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3213         size_t baselen, len = skb->len;
3214         struct ieee802_11_elems elems;
3215
3216         ifmgd = &sdata->u.mgd;
3217
3218         sdata_assert_lock(sdata);
3219
3220         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3221                 return; /* ignore ProbeResp to foreign address */
3222
3223         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3224         if (baselen > len)
3225                 return;
3226
3227         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3228                                false, &elems);
3229
3230         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3231
3232         if (ifmgd->associated &&
3233             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3234                 ieee80211_reset_ap_probe(sdata);
3235 }
3236
3237 /*
3238  * This is the canonical list of information elements we care about,
3239  * the filter code also gives us all changes to the Microsoft OUI
3240  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3241  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3242  * changes to requested client power.
3243  *
3244  * We implement beacon filtering in software since that means we can
3245  * avoid processing the frame here and in cfg80211, and userspace
3246  * will not be able to tell whether the hardware supports it or not.
3247  *
3248  * XXX: This list needs to be dynamic -- userspace needs to be able to
3249  *      add items it requires. It also needs to be able to tell us to
3250  *      look out for other vendor IEs.
3251  */
3252 static const u64 care_about_ies =
3253         (1ULL << WLAN_EID_COUNTRY) |
3254         (1ULL << WLAN_EID_ERP_INFO) |
3255         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3256         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3257         (1ULL << WLAN_EID_HT_CAPABILITY) |
3258         (1ULL << WLAN_EID_HT_OPERATION) |
3259         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3260
3261 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3262                                      struct ieee80211_mgmt *mgmt, size_t len,
3263                                      struct ieee80211_rx_status *rx_status)
3264 {
3265         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3266         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3267         size_t baselen;
3268         struct ieee802_11_elems elems;
3269         struct ieee80211_local *local = sdata->local;
3270         struct ieee80211_chanctx_conf *chanctx_conf;
3271         struct ieee80211_channel *chan;
3272         struct sta_info *sta;
3273         u32 changed = 0;
3274         bool erp_valid;
3275         u8 erp_value = 0;
3276         u32 ncrc;
3277         u8 *bssid;
3278         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3279
3280         sdata_assert_lock(sdata);
3281
3282         /* Process beacon from the current BSS */
3283         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3284         if (baselen > len)
3285                 return;
3286
3287         rcu_read_lock();
3288         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3289         if (!chanctx_conf) {
3290                 rcu_read_unlock();
3291                 return;
3292         }
3293
3294         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3295                 rcu_read_unlock();
3296                 return;
3297         }
3298         chan = chanctx_conf->def.chan;
3299         rcu_read_unlock();
3300
3301         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3302             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3303                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3304                                        len - baselen, false, &elems);
3305
3306                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3307                 if (elems.tim && !elems.parse_error) {
3308                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3309                         ifmgd->dtim_period = tim_ie->dtim_period;
3310                 }
3311                 ifmgd->have_beacon = true;
3312                 ifmgd->assoc_data->need_beacon = false;
3313                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3314                         sdata->vif.bss_conf.sync_tsf =
3315                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3316                         sdata->vif.bss_conf.sync_device_ts =
3317                                 rx_status->device_timestamp;
3318                         if (elems.tim)
3319                                 sdata->vif.bss_conf.sync_dtim_count =
3320                                         elems.tim->dtim_count;
3321                         else
3322                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3323                 }
3324                 /* continue assoc process */
3325                 ifmgd->assoc_data->timeout = jiffies;
3326                 ifmgd->assoc_data->timeout_started = true;
3327                 run_again(sdata, ifmgd->assoc_data->timeout);
3328                 return;
3329         }
3330
3331         if (!ifmgd->associated ||
3332             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3333                 return;
3334         bssid = ifmgd->associated->bssid;
3335
3336         /* Track average RSSI from the Beacon frames of the current AP */
3337         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3338                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3339                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3340                 ifmgd->last_cqm_event_signal = 0;
3341                 ifmgd->count_beacon_signal = 1;
3342                 ifmgd->last_ave_beacon_signal = 0;
3343         } else {
3344                 ifmgd->count_beacon_signal++;
3345         }
3346
3347         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3348
3349         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3350             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3351                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3352                 int last_sig = ifmgd->last_ave_beacon_signal;
3353                 struct ieee80211_event event = {
3354                         .type = RSSI_EVENT,
3355                 };
3356
3357                 /*
3358                  * if signal crosses either of the boundaries, invoke callback
3359                  * with appropriate parameters
3360                  */
3361                 if (sig > ifmgd->rssi_max_thold &&
3362                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3363                         ifmgd->last_ave_beacon_signal = sig;
3364                         event.u.rssi.data = RSSI_EVENT_HIGH;
3365                         drv_event_callback(local, sdata, &event);
3366                 } else if (sig < ifmgd->rssi_min_thold &&
3367                            (last_sig >= ifmgd->rssi_max_thold ||
3368                            last_sig == 0)) {
3369                         ifmgd->last_ave_beacon_signal = sig;
3370                         event.u.rssi.data = RSSI_EVENT_LOW;
3371                         drv_event_callback(local, sdata, &event);
3372                 }
3373         }
3374
3375         if (bss_conf->cqm_rssi_thold &&
3376             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3377             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3378                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3379                 int last_event = ifmgd->last_cqm_event_signal;
3380                 int thold = bss_conf->cqm_rssi_thold;
3381                 int hyst = bss_conf->cqm_rssi_hyst;
3382
3383                 if (sig < thold &&
3384                     (last_event == 0 || sig < last_event - hyst)) {
3385                         ifmgd->last_cqm_event_signal = sig;
3386                         ieee80211_cqm_rssi_notify(
3387                                 &sdata->vif,
3388                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3389                                 GFP_KERNEL);
3390                 } else if (sig > thold &&
3391                            (last_event == 0 || sig > last_event + hyst)) {
3392                         ifmgd->last_cqm_event_signal = sig;
3393                         ieee80211_cqm_rssi_notify(
3394                                 &sdata->vif,
3395                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3396                                 GFP_KERNEL);
3397                 }
3398         }
3399
3400         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3401                 mlme_dbg_ratelimited(sdata,
3402                                      "cancelling AP probe due to a received beacon\n");
3403                 ieee80211_reset_ap_probe(sdata);
3404         }
3405
3406         /*
3407          * Push the beacon loss detection into the future since
3408          * we are processing a beacon from the AP just now.
3409          */
3410         ieee80211_sta_reset_beacon_monitor(sdata);
3411
3412         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3413         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3414                                           len - baselen, false, &elems,
3415                                           care_about_ies, ncrc);
3416
3417         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3418             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3419                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3420                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3421                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3422                                 ieee80211_hw_config(local,
3423                                                     IEEE80211_CONF_CHANGE_PS);
3424                         }
3425                         ieee80211_send_nullfunc(local, sdata, false);
3426                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3427                         local->pspolling = true;
3428
3429                         /*
3430                          * Here is assumed that the driver will be
3431                          * able to send ps-poll frame and receive a
3432                          * response even though power save mode is
3433                          * enabled, but some drivers might require
3434                          * to disable power save here. This needs
3435                          * to be investigated.
3436                          */
3437                         ieee80211_send_pspoll(local, sdata);
3438                 }
3439         }
3440
3441         if (sdata->vif.p2p ||
3442             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3443                 struct ieee80211_p2p_noa_attr noa = {};
3444                 int ret;
3445
3446                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3447                                             len - baselen,
3448                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3449                                             (u8 *) &noa, sizeof(noa));
3450                 if (ret >= 2) {
3451                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3452                                 /* valid noa_attr and index changed */
3453                                 sdata->u.mgd.p2p_noa_index = noa.index;
3454                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3455                                 changed |= BSS_CHANGED_P2P_PS;
3456                                 /*
3457                                  * make sure we update all information, the CRC
3458                                  * mechanism doesn't look at P2P attributes.
3459                                  */
3460                                 ifmgd->beacon_crc_valid = false;
3461                         }
3462                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3463                         /* noa_attr not found and we had valid noa_attr before */
3464                         sdata->u.mgd.p2p_noa_index = -1;
3465                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3466                         changed |= BSS_CHANGED_P2P_PS;
3467                         ifmgd->beacon_crc_valid = false;
3468                 }
3469         }
3470
3471         if (ifmgd->csa_waiting_bcn)
3472                 ieee80211_chswitch_post_beacon(sdata);
3473
3474         /*
3475          * Update beacon timing and dtim count on every beacon appearance. This
3476          * will allow the driver to use the most updated values. Do it before
3477          * comparing this one with last received beacon.
3478          * IMPORTANT: These parameters would possibly be out of sync by the time
3479          * the driver will use them. The synchronized view is currently
3480          * guaranteed only in certain callbacks.
3481          */
3482         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3483                 sdata->vif.bss_conf.sync_tsf =
3484                         le64_to_cpu(mgmt->u.beacon.timestamp);
3485                 sdata->vif.bss_conf.sync_device_ts =
3486                         rx_status->device_timestamp;
3487                 if (elems.tim)
3488                         sdata->vif.bss_conf.sync_dtim_count =
3489                                 elems.tim->dtim_count;
3490                 else
3491                         sdata->vif.bss_conf.sync_dtim_count = 0;
3492         }
3493
3494         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3495                 return;
3496         ifmgd->beacon_crc = ncrc;
3497         ifmgd->beacon_crc_valid = true;
3498
3499         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3500
3501         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3502                                          rx_status->device_timestamp,
3503                                          &elems, true);
3504
3505         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3506             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3507                                      elems.wmm_param_len))
3508                 changed |= BSS_CHANGED_QOS;
3509
3510         /*
3511          * If we haven't had a beacon before, tell the driver about the
3512          * DTIM period (and beacon timing if desired) now.
3513          */
3514         if (!ifmgd->have_beacon) {
3515                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3516                 if (elems.tim)
3517                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3518                 else
3519                         bss_conf->dtim_period = 1;
3520
3521                 changed |= BSS_CHANGED_BEACON_INFO;
3522                 ifmgd->have_beacon = true;
3523
3524                 mutex_lock(&local->iflist_mtx);
3525                 ieee80211_recalc_ps(local);
3526                 mutex_unlock(&local->iflist_mtx);
3527
3528                 ieee80211_recalc_ps_vif(sdata);
3529         }
3530
3531         if (elems.erp_info) {
3532                 erp_valid = true;
3533                 erp_value = elems.erp_info[0];
3534         } else {
3535                 erp_valid = false;
3536         }
3537         changed |= ieee80211_handle_bss_capability(sdata,
3538                         le16_to_cpu(mgmt->u.beacon.capab_info),
3539                         erp_valid, erp_value);
3540
3541         mutex_lock(&local->sta_mtx);
3542         sta = sta_info_get(sdata, bssid);
3543
3544         if (ieee80211_config_bw(sdata, sta,
3545                                 elems.ht_cap_elem, elems.ht_operation,
3546                                 elems.vht_operation, bssid, &changed)) {
3547                 mutex_unlock(&local->sta_mtx);
3548                 sdata_info(sdata,
3549                            "failed to follow AP %pM bandwidth change, disconnect\n",
3550                            bssid);
3551                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3552                                        WLAN_REASON_DEAUTH_LEAVING,
3553                                        true, deauth_buf);
3554                 ieee80211_report_disconnect(sdata, deauth_buf,
3555                                             sizeof(deauth_buf), true,
3556                                             WLAN_REASON_DEAUTH_LEAVING);
3557                 return;
3558         }
3559
3560         if (sta && elems.opmode_notif)
3561                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3562                                             rx_status->band);
3563         mutex_unlock(&local->sta_mtx);
3564
3565         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3566                                                elems.country_elem,
3567                                                elems.country_elem_len,
3568                                                elems.pwr_constr_elem,
3569                                                elems.cisco_dtpc_elem);
3570
3571         ieee80211_bss_info_change_notify(sdata, changed);
3572 }
3573
3574 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3575                                   struct sk_buff *skb)
3576 {
3577         struct ieee80211_rx_status *rx_status;
3578         struct ieee80211_mgmt *mgmt;
3579         u16 fc;
3580         struct ieee802_11_elems elems;
3581         int ies_len;
3582
3583         rx_status = (struct ieee80211_rx_status *) skb->cb;
3584         mgmt = (struct ieee80211_mgmt *) skb->data;
3585         fc = le16_to_cpu(mgmt->frame_control);
3586
3587         sdata_lock(sdata);
3588
3589         switch (fc & IEEE80211_FCTL_STYPE) {
3590         case IEEE80211_STYPE_BEACON:
3591                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3592                 break;
3593         case IEEE80211_STYPE_PROBE_RESP:
3594                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3595                 break;
3596         case IEEE80211_STYPE_AUTH:
3597                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3598                 break;
3599         case IEEE80211_STYPE_DEAUTH:
3600                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3601                 break;
3602         case IEEE80211_STYPE_DISASSOC:
3603                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3604                 break;
3605         case IEEE80211_STYPE_ASSOC_RESP:
3606         case IEEE80211_STYPE_REASSOC_RESP:
3607                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3608                 break;
3609         case IEEE80211_STYPE_ACTION:
3610                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3611                         ies_len = skb->len -
3612                                   offsetof(struct ieee80211_mgmt,
3613                                            u.action.u.chan_switch.variable);
3614
3615                         if (ies_len < 0)
3616                                 break;
3617
3618                         ieee802_11_parse_elems(
3619                                 mgmt->u.action.u.chan_switch.variable,
3620                                 ies_len, true, &elems);
3621
3622                         if (elems.parse_error)
3623                                 break;
3624
3625                         ieee80211_sta_process_chanswitch(sdata,
3626                                                  rx_status->mactime,
3627                                                  rx_status->device_timestamp,
3628                                                  &elems, false);
3629                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3630                         ies_len = skb->len -
3631                                   offsetof(struct ieee80211_mgmt,
3632                                            u.action.u.ext_chan_switch.variable);
3633
3634                         if (ies_len < 0)
3635                                 break;
3636
3637                         ieee802_11_parse_elems(
3638                                 mgmt->u.action.u.ext_chan_switch.variable,
3639                                 ies_len, true, &elems);
3640
3641                         if (elems.parse_error)
3642                                 break;
3643
3644                         /* for the handling code pretend this was also an IE */
3645                         elems.ext_chansw_ie =
3646                                 &mgmt->u.action.u.ext_chan_switch.data;
3647
3648                         ieee80211_sta_process_chanswitch(sdata,
3649                                                  rx_status->mactime,
3650                                                  rx_status->device_timestamp,
3651                                                  &elems, false);
3652                 }
3653                 break;
3654         }
3655         sdata_unlock(sdata);
3656 }
3657
3658 static void ieee80211_sta_timer(unsigned long data)
3659 {
3660         struct ieee80211_sub_if_data *sdata =
3661                 (struct ieee80211_sub_if_data *) data;
3662
3663         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3664 }
3665
3666 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3667                                           u8 *bssid, u8 reason, bool tx)
3668 {
3669         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3670
3671         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3672                                tx, frame_buf);
3673
3674         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3675                                     reason);
3676 }
3677
3678 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3679 {
3680         struct ieee80211_local *local = sdata->local;
3681         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3682         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3683         u32 tx_flags = 0;
3684         u16 trans = 1;
3685         u16 status = 0;
3686
3687         sdata_assert_lock(sdata);
3688
3689         if (WARN_ON_ONCE(!auth_data))
3690                 return -EINVAL;
3691
3692         auth_data->tries++;
3693
3694         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3695                 sdata_info(sdata, "authentication with %pM timed out\n",
3696                            auth_data->bss->bssid);
3697
3698                 /*
3699                  * Most likely AP is not in the range so remove the
3700                  * bss struct for that AP.
3701                  */
3702                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3703
3704                 return -ETIMEDOUT;
3705         }
3706
3707         drv_mgd_prepare_tx(local, sdata);
3708
3709         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3710                    auth_data->bss->bssid, auth_data->tries,
3711                    IEEE80211_AUTH_MAX_TRIES);
3712
3713         auth_data->expected_transaction = 2;
3714
3715         if (auth_data->algorithm == WLAN_AUTH_SAE) {
3716                 trans = auth_data->sae_trans;
3717                 status = auth_data->sae_status;
3718                 auth_data->expected_transaction = trans;
3719         }
3720
3721         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3722                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3723                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3724
3725         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3726                             auth_data->data, auth_data->data_len,
3727                             auth_data->bss->bssid,
3728                             auth_data->bss->bssid, NULL, 0, 0,
3729                             tx_flags);
3730
3731         if (tx_flags == 0) {
3732                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3733                 auth_data->timeout_started = true;
3734                 run_again(sdata, auth_data->timeout);
3735         } else {
3736                 auth_data->timeout =
3737                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3738                 auth_data->timeout_started = true;
3739                 run_again(sdata, auth_data->timeout);
3740         }
3741
3742         return 0;
3743 }
3744
3745 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3746 {
3747         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3748         struct ieee80211_local *local = sdata->local;
3749
3750         sdata_assert_lock(sdata);
3751
3752         assoc_data->tries++;
3753         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3754                 sdata_info(sdata, "association with %pM timed out\n",
3755                            assoc_data->bss->bssid);
3756
3757                 /*
3758                  * Most likely AP is not in the range so remove the
3759                  * bss struct for that AP.
3760                  */
3761                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3762
3763                 return -ETIMEDOUT;
3764         }
3765
3766         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3767                    assoc_data->bss->bssid, assoc_data->tries,
3768                    IEEE80211_ASSOC_MAX_TRIES);
3769         ieee80211_send_assoc(sdata);
3770
3771         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3772                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3773                 assoc_data->timeout_started = true;
3774                 run_again(sdata, assoc_data->timeout);
3775         } else {
3776                 assoc_data->timeout =
3777                         round_jiffies_up(jiffies +
3778                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3779                 assoc_data->timeout_started = true;
3780                 run_again(sdata, assoc_data->timeout);
3781         }
3782
3783         return 0;
3784 }
3785
3786 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3787                                   __le16 fc, bool acked)
3788 {
3789         struct ieee80211_local *local = sdata->local;
3790
3791         sdata->u.mgd.status_fc = fc;
3792         sdata->u.mgd.status_acked = acked;
3793         sdata->u.mgd.status_received = true;
3794
3795         ieee80211_queue_work(&local->hw, &sdata->work);
3796 }
3797
3798 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3799 {
3800         struct ieee80211_local *local = sdata->local;
3801         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3802
3803         sdata_lock(sdata);
3804
3805         if (ifmgd->status_received) {
3806                 __le16 fc = ifmgd->status_fc;
3807                 bool status_acked = ifmgd->status_acked;
3808
3809                 ifmgd->status_received = false;
3810                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3811                         if (status_acked) {
3812                                 ifmgd->auth_data->timeout =
3813                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3814                                 run_again(sdata, ifmgd->auth_data->timeout);
3815                         } else {
3816                                 ifmgd->auth_data->timeout = jiffies - 1;
3817                         }
3818                         ifmgd->auth_data->timeout_started = true;
3819                 } else if (ifmgd->assoc_data &&
3820                            (ieee80211_is_assoc_req(fc) ||
3821                             ieee80211_is_reassoc_req(fc))) {
3822                         if (status_acked) {
3823                                 ifmgd->assoc_data->timeout =
3824                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3825                                 run_again(sdata, ifmgd->assoc_data->timeout);
3826                         } else {
3827                                 ifmgd->assoc_data->timeout = jiffies - 1;
3828                         }
3829                         ifmgd->assoc_data->timeout_started = true;
3830                 }
3831         }
3832
3833         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3834             time_after(jiffies, ifmgd->auth_data->timeout)) {
3835                 if (ifmgd->auth_data->done) {
3836                         /*
3837                          * ok ... we waited for assoc but userspace didn't,
3838                          * so let's just kill the auth data
3839                          */
3840                         ieee80211_destroy_auth_data(sdata, false);
3841                 } else if (ieee80211_auth(sdata)) {
3842                         u8 bssid[ETH_ALEN];
3843                         struct ieee80211_event event = {
3844                                 .type = MLME_EVENT,
3845                                 .u.mlme.data = AUTH_EVENT,
3846                                 .u.mlme.status = MLME_TIMEOUT,
3847                         };
3848
3849                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3850
3851                         ieee80211_destroy_auth_data(sdata, false);
3852
3853                         cfg80211_auth_timeout(sdata->dev, bssid);
3854                         drv_event_callback(sdata->local, sdata, &event);
3855                 }
3856         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3857                 run_again(sdata, ifmgd->auth_data->timeout);
3858
3859         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3860             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3861                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3862                     ieee80211_do_assoc(sdata)) {
3863                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3864                         struct ieee80211_event event = {
3865                                 .type = MLME_EVENT,
3866                                 .u.mlme.data = ASSOC_EVENT,
3867                                 .u.mlme.status = MLME_TIMEOUT,
3868                         };
3869
3870                         ieee80211_destroy_assoc_data(sdata, false);
3871                         cfg80211_assoc_timeout(sdata->dev, bss);
3872                         drv_event_callback(sdata->local, sdata, &event);
3873                 }
3874         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3875                 run_again(sdata, ifmgd->assoc_data->timeout);
3876
3877         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3878             ifmgd->associated) {
3879                 u8 bssid[ETH_ALEN];
3880                 int max_tries;
3881
3882                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3883
3884                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3885                         max_tries = max_nullfunc_tries;
3886                 else
3887                         max_tries = max_probe_tries;
3888
3889                 /* ACK received for nullfunc probing frame */
3890                 if (!ifmgd->probe_send_count)
3891                         ieee80211_reset_ap_probe(sdata);
3892                 else if (ifmgd->nullfunc_failed) {
3893                         if (ifmgd->probe_send_count < max_tries) {
3894                                 mlme_dbg(sdata,
3895                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3896                                          bssid, ifmgd->probe_send_count,
3897                                          max_tries);
3898                                 ieee80211_mgd_probe_ap_send(sdata);
3899                         } else {
3900                                 mlme_dbg(sdata,
3901                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3902                                          bssid);
3903                                 ieee80211_sta_connection_lost(sdata, bssid,
3904                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3905                                         false);
3906                         }
3907                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3908                         run_again(sdata, ifmgd->probe_timeout);
3909                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3910                         mlme_dbg(sdata,
3911                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3912                                  bssid, probe_wait_ms);
3913                         ieee80211_sta_connection_lost(sdata, bssid,
3914                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3915                 } else if (ifmgd->probe_send_count < max_tries) {
3916                         mlme_dbg(sdata,
3917                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3918                                  bssid, probe_wait_ms,
3919                                  ifmgd->probe_send_count, max_tries);
3920                         ieee80211_mgd_probe_ap_send(sdata);
3921                 } else {
3922                         /*
3923                          * We actually lost the connection ... or did we?
3924                          * Let's make sure!
3925                          */
3926                         mlme_dbg(sdata,
3927                                  "No probe response from AP %pM after %dms, disconnecting.\n",
3928                                  bssid, probe_wait_ms);
3929
3930                         ieee80211_sta_connection_lost(sdata, bssid,
3931                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3932                 }
3933         }
3934
3935         sdata_unlock(sdata);
3936 }
3937
3938 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3939 {
3940         struct ieee80211_sub_if_data *sdata =
3941                 (struct ieee80211_sub_if_data *) data;
3942         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3943
3944         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3945                 return;
3946
3947         sdata->u.mgd.connection_loss = false;
3948         ieee80211_queue_work(&sdata->local->hw,
3949                              &sdata->u.mgd.beacon_connection_loss_work);
3950 }
3951
3952 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3953 {
3954         struct ieee80211_sub_if_data *sdata =
3955                 (struct ieee80211_sub_if_data *) data;
3956         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3957         struct ieee80211_local *local = sdata->local;
3958
3959         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3960                 return;
3961
3962         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3963 }
3964
3965 static void ieee80211_sta_monitor_work(struct work_struct *work)
3966 {
3967         struct ieee80211_sub_if_data *sdata =
3968                 container_of(work, struct ieee80211_sub_if_data,
3969                              u.mgd.monitor_work);
3970
3971         ieee80211_mgd_probe_ap(sdata, false);
3972 }
3973
3974 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3975 {
3976         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3977                 __ieee80211_stop_poll(sdata);
3978
3979                 /* let's probe the connection once */
3980                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
3981                         ieee80211_queue_work(&sdata->local->hw,
3982                                              &sdata->u.mgd.monitor_work);
3983         }
3984 }
3985
3986 #ifdef CONFIG_PM
3987 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3988 {
3989         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3990         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3991
3992         sdata_lock(sdata);
3993
3994         if (ifmgd->auth_data || ifmgd->assoc_data) {
3995                 const u8 *bssid = ifmgd->auth_data ?
3996                                 ifmgd->auth_data->bss->bssid :
3997                                 ifmgd->assoc_data->bss->bssid;
3998
3999                 /*
4000                  * If we are trying to authenticate / associate while suspending,
4001                  * cfg80211 won't know and won't actually abort those attempts,
4002                  * thus we need to do that ourselves.
4003                  */
4004                 ieee80211_send_deauth_disassoc(sdata, bssid,
4005                                                IEEE80211_STYPE_DEAUTH,
4006                                                WLAN_REASON_DEAUTH_LEAVING,
4007                                                false, frame_buf);
4008                 if (ifmgd->assoc_data)
4009                         ieee80211_destroy_assoc_data(sdata, false);
4010                 if (ifmgd->auth_data)
4011                         ieee80211_destroy_auth_data(sdata, false);
4012                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4013                                       IEEE80211_DEAUTH_FRAME_LEN);
4014         }
4015
4016         /* This is a bit of a hack - we should find a better and more generic
4017          * solution to this. Normally when suspending, cfg80211 will in fact
4018          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4019          * auth (not so important) or assoc (this is the problem) process.
4020          *
4021          * As a consequence, it can happen that we are in the process of both
4022          * associating and suspending, and receive an association response
4023          * after cfg80211 has checked if it needs to disconnect, but before
4024          * we actually set the flag to drop incoming frames. This will then
4025          * cause the workqueue flush to process the association response in
4026          * the suspend, resulting in a successful association just before it
4027          * tries to remove the interface from the driver, which now though
4028          * has a channel context assigned ... this results in issues.
4029          *
4030          * To work around this (for now) simply deauth here again if we're
4031          * now connected.
4032          */
4033         if (ifmgd->associated && !sdata->local->wowlan) {
4034                 u8 bssid[ETH_ALEN];
4035                 struct cfg80211_deauth_request req = {
4036                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4037                         .bssid = bssid,
4038                 };
4039
4040                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4041                 ieee80211_mgd_deauth(sdata, &req);
4042         }
4043
4044         sdata_unlock(sdata);
4045 }
4046
4047 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4048 {
4049         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4050
4051         sdata_lock(sdata);
4052         if (!ifmgd->associated) {
4053                 sdata_unlock(sdata);
4054                 return;
4055         }
4056
4057         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4058                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4059                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4060                 ieee80211_sta_connection_lost(sdata,
4061                                               ifmgd->associated->bssid,
4062                                               WLAN_REASON_UNSPECIFIED,
4063                                               true);
4064                 sdata_unlock(sdata);
4065                 return;
4066         }
4067         sdata_unlock(sdata);
4068 }
4069 #endif
4070
4071 /* interface setup */
4072 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4073 {
4074         struct ieee80211_if_managed *ifmgd;
4075
4076         ifmgd = &sdata->u.mgd;
4077         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4078         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4079         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4080                   ieee80211_beacon_connection_loss_work);
4081         INIT_WORK(&ifmgd->csa_connection_drop_work,
4082                   ieee80211_csa_connection_drop_work);
4083         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4084         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4085                           ieee80211_tdls_peer_del_work);
4086         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4087                     (unsigned long) sdata);
4088         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4089                     (unsigned long) sdata);
4090         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4091                     (unsigned long) sdata);
4092         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4093                     (unsigned long) sdata);
4094         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4095                           ieee80211_sta_handle_tspec_ac_params_wk);
4096
4097         ifmgd->flags = 0;
4098         ifmgd->powersave = sdata->wdev.ps;
4099         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4100         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4101         ifmgd->p2p_noa_index = -1;
4102
4103         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4104                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4105         else
4106                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4107
4108         /* Setup TDLS data */
4109         spin_lock_init(&ifmgd->teardown_lock);
4110         ifmgd->teardown_skb = NULL;
4111         ifmgd->orig_teardown_skb = NULL;
4112 }
4113
4114 /* scan finished notification */
4115 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4116 {
4117         struct ieee80211_sub_if_data *sdata;
4118
4119         /* Restart STA timers */
4120         rcu_read_lock();
4121         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4122                 if (ieee80211_sdata_running(sdata))
4123                         ieee80211_restart_sta_timer(sdata);
4124         }
4125         rcu_read_unlock();
4126 }
4127
4128 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4129                                      struct cfg80211_bss *cbss)
4130 {
4131         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4132         const u8 *ht_cap_ie, *vht_cap_ie;
4133         const struct ieee80211_ht_cap *ht_cap;
4134         const struct ieee80211_vht_cap *vht_cap;
4135         u8 chains = 1;
4136
4137         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4138                 return chains;
4139
4140         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4141         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4142                 ht_cap = (void *)(ht_cap_ie + 2);
4143                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4144                 /*
4145                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4146                  *       "Tx Unequal Modulation Supported" fields.
4147                  */
4148         }
4149
4150         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4151                 return chains;
4152
4153         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4154         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4155                 u8 nss;
4156                 u16 tx_mcs_map;
4157
4158                 vht_cap = (void *)(vht_cap_ie + 2);
4159                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4160                 for (nss = 8; nss > 0; nss--) {
4161                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4162                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4163                                 break;
4164                 }
4165                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4166                 chains = max(chains, nss);
4167         }
4168
4169         return chains;
4170 }
4171
4172 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4173                                   struct cfg80211_bss *cbss)
4174 {
4175         struct ieee80211_local *local = sdata->local;
4176         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4177         const struct ieee80211_ht_cap *ht_cap = NULL;
4178         const struct ieee80211_ht_operation *ht_oper = NULL;
4179         const struct ieee80211_vht_operation *vht_oper = NULL;
4180         struct ieee80211_supported_band *sband;
4181         struct cfg80211_chan_def chandef;
4182         int ret;
4183         u32 i;
4184         bool have_80mhz;
4185
4186         sband = local->hw.wiphy->bands[cbss->channel->band];
4187
4188         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4189                           IEEE80211_STA_DISABLE_80P80MHZ |
4190                           IEEE80211_STA_DISABLE_160MHZ);
4191
4192         rcu_read_lock();
4193
4194         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4195             sband->ht_cap.ht_supported) {
4196                 const u8 *ht_oper_ie, *ht_cap_ie;
4197
4198                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4199                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4200                         ht_oper = (void *)(ht_oper_ie + 2);
4201
4202                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4203                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4204                         ht_cap = (void *)(ht_cap_ie + 2);
4205
4206                 if (!ht_cap) {
4207                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4208                         ht_oper = NULL;
4209                 }
4210         }
4211
4212         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4213             sband->vht_cap.vht_supported) {
4214                 const u8 *vht_oper_ie, *vht_cap;
4215
4216                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4217                                                    WLAN_EID_VHT_OPERATION);
4218                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4219                         vht_oper = (void *)(vht_oper_ie + 2);
4220                 if (vht_oper && !ht_oper) {
4221                         vht_oper = NULL;
4222                         sdata_info(sdata,
4223                                    "AP advertised VHT without HT, disabling both\n");
4224                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4225                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4226                 }
4227
4228                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4229                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4230                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4231                         vht_oper = NULL;
4232                 }
4233         }
4234
4235         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4236         have_80mhz = false;
4237         for (i = 0; i < sband->n_channels; i++) {
4238                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4239                                                 IEEE80211_CHAN_NO_80MHZ))
4240                         continue;
4241
4242                 have_80mhz = true;
4243                 break;
4244         }
4245
4246         if (!have_80mhz)
4247                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4248
4249         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4250                                                      cbss->channel,
4251                                                      ht_cap, ht_oper, vht_oper,
4252                                                      &chandef, false);
4253
4254         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4255                                       local->rx_chains);
4256
4257         rcu_read_unlock();
4258
4259         /* will change later if needed */
4260         sdata->smps_mode = IEEE80211_SMPS_OFF;
4261
4262         mutex_lock(&local->mtx);
4263         /*
4264          * If this fails (possibly due to channel context sharing
4265          * on incompatible channels, e.g. 80+80 and 160 sharing the
4266          * same control channel) try to use a smaller bandwidth.
4267          */
4268         ret = ieee80211_vif_use_channel(sdata, &chandef,
4269                                         IEEE80211_CHANCTX_SHARED);
4270
4271         /* don't downgrade for 5 and 10 MHz channels, though. */
4272         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4273             chandef.width == NL80211_CHAN_WIDTH_10)
4274                 goto out;
4275
4276         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4277                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4278                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4279                                                 IEEE80211_CHANCTX_SHARED);
4280         }
4281  out:
4282         mutex_unlock(&local->mtx);
4283         return ret;
4284 }
4285
4286 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4287                                      struct cfg80211_bss *cbss, bool assoc,
4288                                      bool override)
4289 {
4290         struct ieee80211_local *local = sdata->local;
4291         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4292         struct ieee80211_bss *bss = (void *)cbss->priv;
4293         struct sta_info *new_sta = NULL;
4294         struct ieee80211_supported_band *sband;
4295         bool have_sta = false;
4296         int err;
4297
4298         sband = local->hw.wiphy->bands[cbss->channel->band];
4299
4300         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4301                 return -EINVAL;
4302
4303         if (assoc) {
4304                 rcu_read_lock();
4305                 have_sta = sta_info_get(sdata, cbss->bssid);
4306                 rcu_read_unlock();
4307         }
4308
4309         if (!have_sta) {
4310                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4311                 if (!new_sta)
4312                         return -ENOMEM;
4313         }
4314
4315         if (new_sta || override) {
4316                 err = ieee80211_prep_channel(sdata, cbss);
4317                 if (err) {
4318                         if (new_sta)
4319                                 sta_info_free(local, new_sta);
4320                         return -EINVAL;
4321                 }
4322         }
4323
4324         if (new_sta) {
4325                 u32 rates = 0, basic_rates = 0;
4326                 bool have_higher_than_11mbit;
4327                 int min_rate = INT_MAX, min_rate_index = -1;
4328                 struct ieee80211_chanctx_conf *chanctx_conf;
4329                 const struct cfg80211_bss_ies *ies;
4330                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4331                 u32 rate_flags;
4332
4333                 rcu_read_lock();
4334                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4335                 if (WARN_ON(!chanctx_conf)) {
4336                         rcu_read_unlock();
4337                         sta_info_free(local, new_sta);
4338                         return -EINVAL;
4339                 }
4340                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4341                 rcu_read_unlock();
4342
4343                 ieee80211_get_rates(sband, bss->supp_rates,
4344                                     bss->supp_rates_len,
4345                                     &rates, &basic_rates,
4346                                     &have_higher_than_11mbit,
4347                                     &min_rate, &min_rate_index,
4348                                     shift, rate_flags);
4349
4350                 /*
4351                  * This used to be a workaround for basic rates missing
4352                  * in the association response frame. Now that we no
4353                  * longer use the basic rates from there, it probably
4354                  * doesn't happen any more, but keep the workaround so
4355                  * in case some *other* APs are buggy in different ways
4356                  * we can connect -- with a warning.
4357                  */
4358                 if (!basic_rates && min_rate_index >= 0) {
4359                         sdata_info(sdata,
4360                                    "No basic rates, using min rate instead\n");
4361                         basic_rates = BIT(min_rate_index);
4362                 }
4363
4364                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4365                 sdata->vif.bss_conf.basic_rates = basic_rates;
4366
4367                 /* cf. IEEE 802.11 9.2.12 */
4368                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4369                     have_higher_than_11mbit)
4370                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4371                 else
4372                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4373
4374                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4375
4376                 /* set timing information */
4377                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4378                 rcu_read_lock();
4379                 ies = rcu_dereference(cbss->beacon_ies);
4380                 if (ies) {
4381                         const u8 *tim_ie;
4382
4383                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4384                         sdata->vif.bss_conf.sync_device_ts =
4385                                 bss->device_ts_beacon;
4386                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4387                                                   ies->data, ies->len);
4388                         if (tim_ie && tim_ie[1] >= 2)
4389                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4390                         else
4391                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4392                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4393                                                TIMING_BEACON_ONLY)) {
4394                         ies = rcu_dereference(cbss->proberesp_ies);
4395                         /* must be non-NULL since beacon IEs were NULL */
4396                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4397                         sdata->vif.bss_conf.sync_device_ts =
4398                                 bss->device_ts_presp;
4399                         sdata->vif.bss_conf.sync_dtim_count = 0;
4400                 } else {
4401                         sdata->vif.bss_conf.sync_tsf = 0;
4402                         sdata->vif.bss_conf.sync_device_ts = 0;
4403                         sdata->vif.bss_conf.sync_dtim_count = 0;
4404                 }
4405                 rcu_read_unlock();
4406
4407                 /* tell driver about BSSID, basic rates and timing */
4408                 ieee80211_bss_info_change_notify(sdata,
4409                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4410                         BSS_CHANGED_BEACON_INT);
4411
4412                 if (assoc)
4413                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4414
4415                 err = sta_info_insert(new_sta);
4416                 new_sta = NULL;
4417                 if (err) {
4418                         sdata_info(sdata,
4419                                    "failed to insert STA entry for the AP (error %d)\n",
4420                                    err);
4421                         return err;
4422                 }
4423         } else
4424                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4425
4426         /* Cancel scan to ensure that nothing interferes with connection */
4427         if (local->scanning)
4428                 ieee80211_scan_cancel(local);
4429
4430         return 0;
4431 }
4432
4433 /* config hooks */
4434 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4435                        struct cfg80211_auth_request *req)
4436 {
4437         struct ieee80211_local *local = sdata->local;
4438         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4439         struct ieee80211_mgd_auth_data *auth_data;
4440         u16 auth_alg;
4441         int err;
4442
4443         /* prepare auth data structure */
4444
4445         switch (req->auth_type) {
4446         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4447                 auth_alg = WLAN_AUTH_OPEN;
4448                 break;
4449         case NL80211_AUTHTYPE_SHARED_KEY:
4450                 if (IS_ERR(local->wep_tx_tfm))
4451                         return -EOPNOTSUPP;
4452                 auth_alg = WLAN_AUTH_SHARED_KEY;
4453                 break;
4454         case NL80211_AUTHTYPE_FT:
4455                 auth_alg = WLAN_AUTH_FT;
4456                 break;
4457         case NL80211_AUTHTYPE_NETWORK_EAP:
4458                 auth_alg = WLAN_AUTH_LEAP;
4459                 break;
4460         case NL80211_AUTHTYPE_SAE:
4461                 auth_alg = WLAN_AUTH_SAE;
4462                 break;
4463         default:
4464                 return -EOPNOTSUPP;
4465         }
4466
4467         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4468                             req->ie_len, GFP_KERNEL);
4469         if (!auth_data)
4470                 return -ENOMEM;
4471
4472         auth_data->bss = req->bss;
4473
4474         if (req->sae_data_len >= 4) {
4475                 __le16 *pos = (__le16 *) req->sae_data;
4476                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4477                 auth_data->sae_status = le16_to_cpu(pos[1]);
4478                 memcpy(auth_data->data, req->sae_data + 4,
4479                        req->sae_data_len - 4);
4480                 auth_data->data_len += req->sae_data_len - 4;
4481         }
4482
4483         if (req->ie && req->ie_len) {
4484                 memcpy(&auth_data->data[auth_data->data_len],
4485                        req->ie, req->ie_len);
4486                 auth_data->data_len += req->ie_len;
4487         }
4488
4489         if (req->key && req->key_len) {
4490                 auth_data->key_len = req->key_len;
4491                 auth_data->key_idx = req->key_idx;
4492                 memcpy(auth_data->key, req->key, req->key_len);
4493         }
4494
4495         auth_data->algorithm = auth_alg;
4496
4497         /* try to authenticate/probe */
4498
4499         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4500             ifmgd->assoc_data) {
4501                 err = -EBUSY;
4502                 goto err_free;
4503         }
4504
4505         if (ifmgd->auth_data)
4506                 ieee80211_destroy_auth_data(sdata, false);
4507
4508         /* prep auth_data so we don't go into idle on disassoc */
4509         ifmgd->auth_data = auth_data;
4510
4511         if (ifmgd->associated) {
4512                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4513
4514                 sdata_info(sdata,
4515                            "disconnect from AP %pM for new auth to %pM\n",
4516                            ifmgd->associated->bssid, req->bss->bssid);
4517                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4518                                        WLAN_REASON_UNSPECIFIED,
4519                                        false, frame_buf);
4520
4521                 ieee80211_report_disconnect(sdata, frame_buf,
4522                                             sizeof(frame_buf), true,
4523                                             WLAN_REASON_UNSPECIFIED);
4524         }
4525
4526         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4527
4528         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4529         if (err)
4530                 goto err_clear;
4531
4532         err = ieee80211_auth(sdata);
4533         if (err) {
4534                 sta_info_destroy_addr(sdata, req->bss->bssid);
4535                 goto err_clear;
4536         }
4537
4538         /* hold our own reference */
4539         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4540         return 0;
4541
4542  err_clear:
4543         eth_zero_addr(ifmgd->bssid);
4544         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4545         ifmgd->auth_data = NULL;
4546         mutex_lock(&sdata->local->mtx);
4547         ieee80211_vif_release_channel(sdata);
4548         mutex_unlock(&sdata->local->mtx);
4549  err_free:
4550         kfree(auth_data);
4551         return err;
4552 }
4553
4554 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4555                         struct cfg80211_assoc_request *req)
4556 {
4557         struct ieee80211_local *local = sdata->local;
4558         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4559         struct ieee80211_bss *bss = (void *)req->bss->priv;
4560         struct ieee80211_mgd_assoc_data *assoc_data;
4561         const struct cfg80211_bss_ies *beacon_ies;
4562         struct ieee80211_supported_band *sband;
4563         const u8 *ssidie, *ht_ie, *vht_ie;
4564         int i, err;
4565         bool override = false;
4566
4567         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4568         if (!assoc_data)
4569                 return -ENOMEM;
4570
4571         rcu_read_lock();
4572         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4573         if (!ssidie) {
4574                 rcu_read_unlock();
4575                 kfree(assoc_data);
4576                 return -EINVAL;
4577         }
4578         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4579         assoc_data->ssid_len = ssidie[1];
4580         rcu_read_unlock();
4581
4582         if (ifmgd->associated) {
4583                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4584
4585                 sdata_info(sdata,
4586                            "disconnect from AP %pM for new assoc to %pM\n",
4587                            ifmgd->associated->bssid, req->bss->bssid);
4588                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4589                                        WLAN_REASON_UNSPECIFIED,
4590                                        false, frame_buf);
4591
4592                 ieee80211_report_disconnect(sdata, frame_buf,
4593                                             sizeof(frame_buf), true,
4594                                             WLAN_REASON_UNSPECIFIED);
4595         }
4596
4597         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4598                 err = -EBUSY;
4599                 goto err_free;
4600         }
4601
4602         if (ifmgd->assoc_data) {
4603                 err = -EBUSY;
4604                 goto err_free;
4605         }
4606
4607         if (ifmgd->auth_data) {
4608                 bool match;
4609
4610                 /* keep sta info, bssid if matching */
4611                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4612                 ieee80211_destroy_auth_data(sdata, match);
4613         }
4614
4615         /* prepare assoc data */
4616
4617         ifmgd->beacon_crc_valid = false;
4618
4619         assoc_data->wmm = bss->wmm_used &&
4620                           (local->hw.queues >= IEEE80211_NUM_ACS);
4621
4622         /*
4623          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4624          * We still associate in non-HT mode (11a/b/g) if any one of these
4625          * ciphers is configured as pairwise.
4626          * We can set this to true for non-11n hardware, that'll be checked
4627          * separately along with the peer capabilities.
4628          */
4629         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4630                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4631                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4632                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4633                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4634                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4635                         netdev_info(sdata->dev,
4636                                     "disabling HT/VHT due to WEP/TKIP use\n");
4637                 }
4638         }
4639
4640         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4641         sband = local->hw.wiphy->bands[req->bss->channel->band];
4642         if (!sband->ht_cap.ht_supported ||
4643             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4644             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4645                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4646                 if (!bss->wmm_used &&
4647                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4648                         netdev_info(sdata->dev,
4649                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4650         }
4651
4652         /* disable VHT if we don't support it or the AP doesn't use WMM */
4653         if (!sband->vht_cap.vht_supported ||
4654             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4655             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4656                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4657                 if (!bss->wmm_used &&
4658                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4659                         netdev_info(sdata->dev,
4660                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4661         }
4662
4663         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4664         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4665                sizeof(ifmgd->ht_capa_mask));
4666
4667         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4668         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4669                sizeof(ifmgd->vht_capa_mask));
4670
4671         if (req->ie && req->ie_len) {
4672                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4673                 assoc_data->ie_len = req->ie_len;
4674         }
4675
4676         assoc_data->bss = req->bss;
4677
4678         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4679                 if (ifmgd->powersave)
4680                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4681                 else
4682                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4683         } else
4684                 sdata->smps_mode = ifmgd->req_smps;
4685
4686         assoc_data->capability = req->bss->capability;
4687         assoc_data->supp_rates = bss->supp_rates;
4688         assoc_data->supp_rates_len = bss->supp_rates_len;
4689
4690         rcu_read_lock();
4691         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4692         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4693                 assoc_data->ap_ht_param =
4694                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4695         else
4696                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4697         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4698         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4699                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4700                        sizeof(struct ieee80211_vht_cap));
4701         else
4702                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4703         rcu_read_unlock();
4704
4705         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4706                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4707              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4708                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4709
4710         if (bss->wmm_used && bss->uapsd_supported &&
4711             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4712                 assoc_data->uapsd = true;
4713                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4714         } else {
4715                 assoc_data->uapsd = false;
4716                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4717         }
4718
4719         if (req->prev_bssid)
4720                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4721
4722         if (req->use_mfp) {
4723                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4724                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4725         } else {
4726                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4727                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4728         }
4729
4730         if (req->flags & ASSOC_REQ_USE_RRM)
4731                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4732         else
4733                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4734
4735         if (req->crypto.control_port)
4736                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4737         else
4738                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4739
4740         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4741         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4742         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4743                                                         sdata->vif.type);
4744
4745         /* kick off associate process */
4746
4747         ifmgd->assoc_data = assoc_data;
4748         ifmgd->dtim_period = 0;
4749         ifmgd->have_beacon = false;
4750
4751         /* override HT/VHT configuration only if the AP and we support it */
4752         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4753                 struct ieee80211_sta_ht_cap sta_ht_cap;
4754
4755                 if (req->flags & ASSOC_REQ_DISABLE_HT)
4756                         override = true;
4757
4758                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4759                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4760
4761                 /* check for 40 MHz disable override */
4762                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4763                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4764                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4765                         override = true;
4766
4767                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4768                     req->flags & ASSOC_REQ_DISABLE_VHT)
4769                         override = true;
4770         }
4771
4772         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4773                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4774                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4775         }
4776
4777         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4778                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4779
4780         err = ieee80211_prep_connection(sdata, req->bss, true, override);
4781         if (err)
4782                 goto err_clear;
4783
4784         rcu_read_lock();
4785         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4786
4787         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4788             !beacon_ies) {
4789                 /*
4790                  * Wait up to one beacon interval ...
4791                  * should this be more if we miss one?
4792                  */
4793                 sdata_info(sdata, "waiting for beacon from %pM\n",
4794                            ifmgd->bssid);
4795                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4796                 assoc_data->timeout_started = true;
4797                 assoc_data->need_beacon = true;
4798         } else if (beacon_ies) {
4799                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4800                                                     beacon_ies->data,
4801                                                     beacon_ies->len);
4802                 u8 dtim_count = 0;
4803
4804                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4805                         const struct ieee80211_tim_ie *tim;
4806                         tim = (void *)(tim_ie + 2);
4807                         ifmgd->dtim_period = tim->dtim_period;
4808                         dtim_count = tim->dtim_count;
4809                 }
4810                 ifmgd->have_beacon = true;
4811                 assoc_data->timeout = jiffies;
4812                 assoc_data->timeout_started = true;
4813
4814                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4815                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4816                         sdata->vif.bss_conf.sync_device_ts =
4817                                 bss->device_ts_beacon;
4818                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4819                 }
4820         } else {
4821                 assoc_data->timeout = jiffies;
4822                 assoc_data->timeout_started = true;
4823         }
4824         rcu_read_unlock();
4825
4826         run_again(sdata, assoc_data->timeout);
4827
4828         if (bss->corrupt_data) {
4829                 char *corrupt_type = "data";
4830                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4831                         if (bss->corrupt_data &
4832                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4833                                 corrupt_type = "beacon and probe response";
4834                         else
4835                                 corrupt_type = "beacon";
4836                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4837                         corrupt_type = "probe response";
4838                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4839                            corrupt_type);
4840         }
4841
4842         return 0;
4843  err_clear:
4844         eth_zero_addr(ifmgd->bssid);
4845         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4846         ifmgd->assoc_data = NULL;
4847  err_free:
4848         kfree(assoc_data);
4849         return err;
4850 }
4851
4852 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4853                          struct cfg80211_deauth_request *req)
4854 {
4855         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4856         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4857         bool tx = !req->local_state_change;
4858
4859         if (ifmgd->auth_data &&
4860             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4861                 sdata_info(sdata,
4862                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4863                            req->bssid, req->reason_code,
4864                            ieee80211_get_reason_code_string(req->reason_code));
4865
4866                 drv_mgd_prepare_tx(sdata->local, sdata);
4867                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4868                                                IEEE80211_STYPE_DEAUTH,
4869                                                req->reason_code, tx,
4870                                                frame_buf);
4871                 ieee80211_destroy_auth_data(sdata, false);
4872                 ieee80211_report_disconnect(sdata, frame_buf,
4873                                             sizeof(frame_buf), true,
4874                                             req->reason_code);
4875
4876                 return 0;
4877         }
4878
4879         if (ifmgd->assoc_data &&
4880             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4881                 sdata_info(sdata,
4882                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
4883                            req->bssid, req->reason_code,
4884                            ieee80211_get_reason_code_string(req->reason_code));
4885
4886                 drv_mgd_prepare_tx(sdata->local, sdata);
4887                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4888                                                IEEE80211_STYPE_DEAUTH,
4889                                                req->reason_code, tx,
4890                                                frame_buf);
4891                 ieee80211_destroy_assoc_data(sdata, false);
4892                 ieee80211_report_disconnect(sdata, frame_buf,
4893                                             sizeof(frame_buf), true,
4894                                             req->reason_code);
4895                 return 0;
4896         }
4897
4898         if (ifmgd->associated &&
4899             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4900                 sdata_info(sdata,
4901                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4902                            req->bssid, req->reason_code,
4903                            ieee80211_get_reason_code_string(req->reason_code));
4904
4905                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4906                                        req->reason_code, tx, frame_buf);
4907                 ieee80211_report_disconnect(sdata, frame_buf,
4908                                             sizeof(frame_buf), true,
4909                                             req->reason_code);
4910                 return 0;
4911         }
4912
4913         return -ENOTCONN;
4914 }
4915
4916 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4917                            struct cfg80211_disassoc_request *req)
4918 {
4919         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4920         u8 bssid[ETH_ALEN];
4921         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4922
4923         /*
4924          * cfg80211 should catch this ... but it's racy since
4925          * we can receive a disassoc frame, process it, hand it
4926          * to cfg80211 while that's in a locked section already
4927          * trying to tell us that the user wants to disconnect.
4928          */
4929         if (ifmgd->associated != req->bss)
4930                 return -ENOLINK;
4931
4932         sdata_info(sdata,
4933                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
4934                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4935
4936         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4937         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4938                                req->reason_code, !req->local_state_change,
4939                                frame_buf);
4940
4941         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4942                                     req->reason_code);
4943
4944         return 0;
4945 }
4946
4947 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4948 {
4949         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4950
4951         /*
4952          * Make sure some work items will not run after this,
4953          * they will not do anything but might not have been
4954          * cancelled when disconnecting.
4955          */
4956         cancel_work_sync(&ifmgd->monitor_work);
4957         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4958         cancel_work_sync(&ifmgd->request_smps_work);
4959         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4960         cancel_work_sync(&ifmgd->chswitch_work);
4961         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4962
4963         sdata_lock(sdata);
4964         if (ifmgd->assoc_data) {
4965                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4966                 ieee80211_destroy_assoc_data(sdata, false);
4967                 cfg80211_assoc_timeout(sdata->dev, bss);
4968         }
4969         if (ifmgd->auth_data)
4970                 ieee80211_destroy_auth_data(sdata, false);
4971         spin_lock_bh(&ifmgd->teardown_lock);
4972         if (ifmgd->teardown_skb) {
4973                 kfree_skb(ifmgd->teardown_skb);
4974                 ifmgd->teardown_skb = NULL;
4975                 ifmgd->orig_teardown_skb = NULL;
4976         }
4977         spin_unlock_bh(&ifmgd->teardown_lock);
4978         del_timer_sync(&ifmgd->timer);
4979         sdata_unlock(sdata);
4980 }
4981
4982 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4983                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4984                                gfp_t gfp)
4985 {
4986         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4987
4988         trace_api_cqm_rssi_notify(sdata, rssi_event);
4989
4990         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4991 }
4992 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
4993
4994 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
4995 {
4996         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4997
4998         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
4999
5000         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5001 }
5002 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);