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  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/delay.h>
  16 #include <linux/if_ether.h>
  17 #include <linux/skbuff.h>
  18 #include <linux/if_arp.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/moduleparam.h>
  21 #include <linux/rtnetlink.h>
  22 #include <linux/pm_qos.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  * Weight given to the latest Beacon frame when calculating average signal
  85  * strength for Beacon frames received in the current BSS. This must be
  86  * between 1 and 15.
  87  */
  88 #define IEEE80211_SIGNAL_AVE_WEIGHT     3
  89
  90 /*
  91  * How many Beacon frames need to have been used in average signal strength
  92  * before starting to indicate signal change events.
  93  */
  94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  95
  96 /*
  97  * We can have multiple work items (and connection probing)
  98  * scheduling this timer, but we need to take care to only
  99  * reschedule it when it should fire _earlier_ than it was
 100  * asked for before, or if it's not pending right now. This
 101  * function ensures that. Note that it then is required to
 102  * run this function for all timeouts after the first one
 103  * has happened -- the work that runs from this timer will
 104  * do that.
 105  */
 106 static void run_again(struct ieee80211_sub_if_data *sdata,
 107                       unsigned long timeout)
 108 {
 109         sdata_assert_lock(sdata);
 110
 111         if (!timer_pending(&sdata->u.mgd.timer) ||
 112             time_before(timeout, sdata->u.mgd.timer.expires))
 113                 mod_timer(&sdata->u.mgd.timer, timeout);
 114 }
 115
 116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 117 {
 118         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 119                 return;
 120
 121         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 122                 return;
 123
 124         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 125                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 126 }
 127
 128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 129 {
 130         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 131
 132         if (unlikely(!sdata->u.mgd.associated))
 133                 return;
 134
 135         ifmgd->probe_send_count = 0;
 136
 137         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 138                 return;
 139
 140         mod_timer(&sdata->u.mgd.conn_mon_timer,
 141                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 142 }
 143
 144 static int ecw2cw(int ecw)
 145 {
 146         return (1 << ecw) - 1;
 147 }
 148
 149 static u32
 150 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 151                              struct ieee80211_supported_band *sband,
 152                              struct ieee80211_channel *channel,
 153                              const struct ieee80211_ht_cap *ht_cap,
 154                              const struct ieee80211_ht_operation *ht_oper,
 155                              const struct ieee80211_vht_operation *vht_oper,
 156                              struct cfg80211_chan_def *chandef, bool tracking)
 157 {
 158         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 159         struct cfg80211_chan_def vht_chandef;
 160         struct ieee80211_sta_ht_cap sta_ht_cap;
 161         u32 ht_cfreq, ret;
 162
 163         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 164         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 165
 166         chandef->chan = channel;
 167         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 168         chandef->center_freq1 = channel->center_freq;
 169         chandef->center_freq2 = 0;
 170
 171         if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
 172                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 173                 goto out;
 174         }
 175
 176         chandef->width = NL80211_CHAN_WIDTH_20;
 177
 178         if (!(ht_cap->cap_info &
 179               cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
 180                 ret = IEEE80211_STA_DISABLE_40MHZ;
 181                 vht_chandef = *chandef;
 182                 goto out;
 183         }
 184
 185         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 186                                                   channel->band);
 187         /* check that channel matches the right operating channel */
 188         if (!tracking && channel->center_freq != ht_cfreq) {
 189                 /*
 190                  * It's possible that some APs are confused here;
 191                  * Netgear WNDR3700 sometimes reports 4 higher than
 192                  * the actual channel in association responses, but
 193                  * since we look at probe response/beacon data here
 194                  * it should be OK.
 195                  */
 196                 sdata_info(sdata,
 197                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 198                            channel->center_freq, ht_cfreq,
 199                            ht_oper->primary_chan, channel->band);
 200                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 201                 goto out;
 202         }
 203
 204         /* check 40 MHz support, if we have it */
 205         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 206                 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 207                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 208                         chandef->width = NL80211_CHAN_WIDTH_40;
 209                         chandef->center_freq1 += 10;
 210                         break;
 211                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 212                         chandef->width = NL80211_CHAN_WIDTH_40;
 213                         chandef->center_freq1 -= 10;
 214                         break;
 215                 }
 216         } else {
 217                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 218                 ret = IEEE80211_STA_DISABLE_VHT;
 219                 /* also mark 40 MHz disabled */
 220                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 221                 goto out;
 222         }
 223
 224         if (!vht_oper || !sband->vht_cap.vht_supported) {
 225                 ret = IEEE80211_STA_DISABLE_VHT;
 226                 goto out;
 227         }
 228
 229         vht_chandef.chan = channel;
 230         vht_chandef.center_freq1 =
 231                 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
 232                                                channel->band);
 233         vht_chandef.center_freq2 = 0;
 234
 235         switch (vht_oper->chan_width) {
 236         case IEEE80211_VHT_CHANWIDTH_USE_HT:
 237                 vht_chandef.width = chandef->width;
 238                 vht_chandef.center_freq1 = chandef->center_freq1;
 239                 break;
 240         case IEEE80211_VHT_CHANWIDTH_80MHZ:
 241                 vht_chandef.width = NL80211_CHAN_WIDTH_80;
 242                 break;
 243         case IEEE80211_VHT_CHANWIDTH_160MHZ:
 244                 vht_chandef.width = NL80211_CHAN_WIDTH_160;
 245                 break;
 246         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
 247                 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
 248                 vht_chandef.center_freq2 =
 249                         ieee80211_channel_to_frequency(
 250                                 vht_oper->center_freq_seg2_idx,
 251                                 channel->band);
 252                 break;
 253         default:
 254                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 255                         sdata_info(sdata,
 256                                    "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
 257                                    vht_oper->chan_width);
 258                 ret = IEEE80211_STA_DISABLE_VHT;
 259                 goto out;
 260         }
 261
 262         if (!cfg80211_chandef_valid(&vht_chandef)) {
 263                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 264                         sdata_info(sdata,
 265                                    "AP VHT information is invalid, disable VHT\n");
 266                 ret = IEEE80211_STA_DISABLE_VHT;
 267                 goto out;
 268         }
 269
 270         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 271                 ret = 0;
 272                 goto out;
 273         }
 274
 275         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 276                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 277                         sdata_info(sdata,
 278                                    "AP VHT information doesn't match HT, disable VHT\n");
 279                 ret = IEEE80211_STA_DISABLE_VHT;
 280                 goto out;
 281         }
 282
 283         *chandef = vht_chandef;
 284
 285         ret = 0;
 286
 287 out:
 288         /*
 289          * When tracking the current AP, don't do any further checks if the
 290          * new chandef is identical to the one we're currently using for the
 291          * connection. This keeps us from playing ping-pong with regulatory,
 292          * without it the following can happen (for example):
 293          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 294          *  - AP advertises regdom US
 295          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 296          *  - the code below detects an unsupported channel, downgrades, and
 297          *    we disconnect from the AP in the caller
 298          *  - disconnect causes CRDA to reload world regdomain and the game
 299          *    starts anew.
 300          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 301          *
 302          * It seems possible that there are still scenarios with CSA or real
 303          * bandwidth changes where a this could happen, but those cases are
 304          * less common and wouldn't completely prevent using the AP.
 305          */
 306         if (tracking &&
 307             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 308                 return ret;
 309
 310         /* don't print the message below for VHT mismatch if VHT is disabled */
 311         if (ret & IEEE80211_STA_DISABLE_VHT)
 312                 vht_chandef = *chandef;
 313
 314         /*
 315          * Ignore the DISABLED flag when we're already connected and only
 316          * tracking the APs beacon for bandwidth changes - otherwise we
 317          * might get disconnected here if we connect to an AP, update our
 318          * regulatory information based on the AP's country IE and the
 319          * information we have is wrong/outdated and disables the channel
 320          * that we're actually using for the connection to the AP.
 321          */
 322         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 323                                         tracking ? 0 :
 324                                                    IEEE80211_CHAN_DISABLED)) {
 325                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 326                         ret = IEEE80211_STA_DISABLE_HT |
 327                               IEEE80211_STA_DISABLE_VHT;
 328                         break;
 329                 }
 330
 331                 ret |= ieee80211_chandef_downgrade(chandef);
 332         }
 333
 334         if (chandef->width != vht_chandef.width && !tracking)
 335                 sdata_info(sdata,
 336                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 337
 338         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 339         return ret;
 340 }
 341
 342 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 343                                struct sta_info *sta,
 344                                const struct ieee80211_ht_cap *ht_cap,
 345                                const struct ieee80211_ht_operation *ht_oper,
 346                                const struct ieee80211_vht_operation *vht_oper,
 347                                const u8 *bssid, u32 *changed)
 348 {
 349         struct ieee80211_local *local = sdata->local;
 350         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 351         struct ieee80211_supported_band *sband;
 352         struct ieee80211_channel *chan;
 353         struct cfg80211_chan_def chandef;
 354         u16 ht_opmode;
 355         u32 flags;
 356         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 357         int ret;
 358
 359         /* if HT was/is disabled, don't track any bandwidth changes */
 360         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 361                 return 0;
 362
 363         /* don't check VHT if we associated as non-VHT station */
 364         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 365                 vht_oper = NULL;
 366
 367         if (WARN_ON_ONCE(!sta))
 368                 return -EINVAL;
 369
 370         /*
 371          * if bss configuration changed store the new one -
 372          * this may be applicable even if channel is identical
 373          */
 374         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 375         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 376                 *changed |= BSS_CHANGED_HT;
 377                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 378         }
 379
 380         chan = sdata->vif.bss_conf.chandef.chan;
 381         sband = local->hw.wiphy->bands[chan->band];
 382
 383         /* calculate new channel (type) based on HT/VHT operation IEs */
 384         flags = ieee80211_determine_chantype(sdata, sband, chan,
 385                                              ht_cap, ht_oper, vht_oper,
 386                                              &chandef, true);
 387
 388         /*
 389          * Downgrade the new channel if we associated with restricted
 390          * capabilities. For example, if we associated as a 20 MHz STA
 391          * to a 40 MHz AP (due to regulatory, capabilities or config
 392          * reasons) then switching to a 40 MHz channel now won't do us
 393          * any good -- we couldn't use it with the AP.
 394          */
 395         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 396             chandef.width == NL80211_CHAN_WIDTH_80P80)
 397                 flags |= ieee80211_chandef_downgrade(&chandef);
 398         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 399             chandef.width == NL80211_CHAN_WIDTH_160)
 400                 flags |= ieee80211_chandef_downgrade(&chandef);
 401         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 402             chandef.width > NL80211_CHAN_WIDTH_20)
 403                 flags |= ieee80211_chandef_downgrade(&chandef);
 404
 405         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 406                 return 0;
 407
 408         sdata_info(sdata,
 409                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 410                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 411                    chandef.center_freq1, chandef.center_freq2);
 412
 413         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 414                                       IEEE80211_STA_DISABLE_VHT |
 415                                       IEEE80211_STA_DISABLE_40MHZ |
 416                                       IEEE80211_STA_DISABLE_80P80MHZ |
 417                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 418             !cfg80211_chandef_valid(&chandef)) {
 419                 sdata_info(sdata,
 420                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 421                            ifmgd->bssid);
 422                 return -EINVAL;
 423         }
 424
 425         switch (chandef.width) {
 426         case NL80211_CHAN_WIDTH_20_NOHT:
 427         case NL80211_CHAN_WIDTH_20:
 428                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 429                 break;
 430         case NL80211_CHAN_WIDTH_40:
 431                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 432                 break;
 433         case NL80211_CHAN_WIDTH_80:
 434                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 435                 break;
 436         case NL80211_CHAN_WIDTH_80P80:
 437         case NL80211_CHAN_WIDTH_160:
 438                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 439                 break;
 440         default:
 441                 return -EINVAL;
 442         }
 443
 444         if (new_sta_bw > sta->cur_max_bandwidth)
 445                 new_sta_bw = sta->cur_max_bandwidth;
 446
 447         if (new_sta_bw < sta->sta.bandwidth) {
 448                 sta->sta.bandwidth = new_sta_bw;
 449                 rate_control_rate_update(local, sband, sta,
 450                                          IEEE80211_RC_BW_CHANGED);
 451         }
 452
 453         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 454         if (ret) {
 455                 sdata_info(sdata,
 456                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 457                            ifmgd->bssid);
 458                 return ret;
 459         }
 460
 461         if (new_sta_bw > sta->sta.bandwidth) {
 462                 sta->sta.bandwidth = new_sta_bw;
 463                 rate_control_rate_update(local, sband, sta,
 464                                          IEEE80211_RC_BW_CHANGED);
 465         }
 466
 467         return 0;
 468 }
 469
 470 /* frame sending functions */
 471
 472 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 473                                 struct sk_buff *skb, u8 ap_ht_param,
 474                                 struct ieee80211_supported_band *sband,
 475                                 struct ieee80211_channel *channel,
 476                                 enum ieee80211_smps_mode smps)
 477 {
 478         u8 *pos;
 479         u32 flags = channel->flags;
 480         u16 cap;
 481         struct ieee80211_sta_ht_cap ht_cap;
 482
 483         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 484
 485         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 486         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 487
 488         /* determine capability flags */
 489         cap = ht_cap.cap;
 490
 491         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 492         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 493                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 494                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 495                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 496                 }
 497                 break;
 498         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 499                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 500                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 501                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 502                 }
 503                 break;
 504         }
 505
 506         /*
 507          * If 40 MHz was disabled associate as though we weren't
 508          * capable of 40 MHz -- some broken APs will never fall
 509          * back to trying to transmit in 20 MHz.
 510          */
 511         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 512                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 513                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 514         }
 515
 516         /* set SM PS mode properly */
 517         cap &= ~IEEE80211_HT_CAP_SM_PS;
 518         switch (smps) {
 519         case IEEE80211_SMPS_AUTOMATIC:
 520         case IEEE80211_SMPS_NUM_MODES:
 521                 WARN_ON(1);
 522         case IEEE80211_SMPS_OFF:
 523                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 524                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 525                 break;
 526         case IEEE80211_SMPS_STATIC:
 527                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 528                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 529                 break;
 530         case IEEE80211_SMPS_DYNAMIC:
 531                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 532                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 533                 break;
 534         }
 535
 536         /* reserve and fill IE */
 537         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 538         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 539 }
 540
 541 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 542                                  struct sk_buff *skb,
 543                                  struct ieee80211_supported_band *sband,
 544                                  struct ieee80211_vht_cap *ap_vht_cap)
 545 {
 546         u8 *pos;
 547         u32 cap;
 548         struct ieee80211_sta_vht_cap vht_cap;
 549         u32 mask, ap_bf_sts, our_bf_sts;
 550
 551         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 552
 553         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 554         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 555
 556         /* determine capability flags */
 557         cap = vht_cap.cap;
 558
 559         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 560                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 561
 562                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 563                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 564                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 565                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 566         }
 567
 568         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 569                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 570                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 571         }
 572
 573         /*
 574          * Some APs apparently get confused if our capabilities are better
 575          * than theirs, so restrict what we advertise in the assoc request.
 576          */
 577         if (!(ap_vht_cap->vht_cap_info &
 578                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 579                 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
 580
 581         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 582
 583         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 584         our_bf_sts = cap & mask;
 585
 586         if (ap_bf_sts < our_bf_sts) {
 587                 cap &= ~mask;
 588                 cap |= ap_bf_sts;
 589         }
 590
 591         /* reserve and fill IE */
 592         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 593         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 594 }
 595
 596 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 597 {
 598         struct ieee80211_local *local = sdata->local;
 599         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 600         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 601         struct sk_buff *skb;
 602         struct ieee80211_mgmt *mgmt;
 603         u8 *pos, qos_info;
 604         size_t offset = 0, noffset;
 605         int i, count, rates_len, supp_rates_len, shift;
 606         u16 capab;
 607         struct ieee80211_supported_band *sband;
 608         struct ieee80211_chanctx_conf *chanctx_conf;
 609         struct ieee80211_channel *chan;
 610         u32 rate_flags, rates = 0;
 611
 612         sdata_assert_lock(sdata);
 613
 614         rcu_read_lock();
 615         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 616         if (WARN_ON(!chanctx_conf)) {
 617                 rcu_read_unlock();
 618                 return;
 619         }
 620         chan = chanctx_conf->def.chan;
 621         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 622         rcu_read_unlock();
 623         sband = local->hw.wiphy->bands[chan->band];
 624         shift = ieee80211_vif_get_shift(&sdata->vif);
 625
 626         if (assoc_data->supp_rates_len) {
 627                 /*
 628                  * Get all rates supported by the device and the AP as
 629                  * some APs don't like getting a superset of their rates
 630                  * in the association request (e.g. D-Link DAP 1353 in
 631                  * b-only mode)...
 632                  */
 633                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 634                                                      assoc_data->supp_rates,
 635                                                      assoc_data->supp_rates_len,
 636                                                      &rates);
 637         } else {
 638                 /*
 639                  * In case AP not provide any supported rates information
 640                  * before association, we send information element(s) with
 641                  * all rates that we support.
 642                  */
 643                 rates_len = 0;
 644                 for (i = 0; i < sband->n_bitrates; i++) {
 645                         if ((rate_flags & sband->bitrates[i].flags)
 646                             != rate_flags)
 647                                 continue;
 648                         rates |= BIT(i);
 649                         rates_len++;
 650                 }
 651         }
 652
 653         skb = alloc_skb(local->hw.extra_tx_headroom +
 654                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 655                         2 + assoc_data->ssid_len + /* SSID */
 656                         4 + rates_len + /* (extended) rates */
 657                         4 + /* power capability */
 658                         2 + 2 * sband->n_channels + /* supported channels */
 659                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 660                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 661                         assoc_data->ie_len + /* extra IEs */
 662                         9, /* WMM */
 663                         GFP_KERNEL);
 664         if (!skb)
 665                 return;
 666
 667         skb_reserve(skb, local->hw.extra_tx_headroom);
 668
 669         capab = WLAN_CAPABILITY_ESS;
 670
 671         if (sband->band == IEEE80211_BAND_2GHZ) {
 672                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 673                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 674                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 675                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 676         }
 677
 678         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 679                 capab |= WLAN_CAPABILITY_PRIVACY;
 680
 681         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 682             (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 683                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 684
 685         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 686                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 687
 688         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 689         memset(mgmt, 0, 24);
 690         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 691         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 692         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 693
 694         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 695                 skb_put(skb, 10);
 696                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 697                                                   IEEE80211_STYPE_REASSOC_REQ);
 698                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 699                 mgmt->u.reassoc_req.listen_interval =
 700                                 cpu_to_le16(local->hw.conf.listen_interval);
 701                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 702                        ETH_ALEN);
 703         } else {
 704                 skb_put(skb, 4);
 705                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 706                                                   IEEE80211_STYPE_ASSOC_REQ);
 707                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 708                 mgmt->u.assoc_req.listen_interval =
 709                                 cpu_to_le16(local->hw.conf.listen_interval);
 710         }
 711
 712         /* SSID */
 713         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 714         *pos++ = WLAN_EID_SSID;
 715         *pos++ = assoc_data->ssid_len;
 716         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 717
 718         /* add all rates which were marked to be used above */
 719         supp_rates_len = rates_len;
 720         if (supp_rates_len > 8)
 721                 supp_rates_len = 8;
 722
 723         pos = skb_put(skb, supp_rates_len + 2);
 724         *pos++ = WLAN_EID_SUPP_RATES;
 725         *pos++ = supp_rates_len;
 726
 727         count = 0;
 728         for (i = 0; i < sband->n_bitrates; i++) {
 729                 if (BIT(i) & rates) {
 730                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 731                                                 5 * (1 << shift));
 732                         *pos++ = (u8) rate;
 733                         if (++count == 8)
 734                                 break;
 735                 }
 736         }
 737
 738         if (rates_len > count) {
 739                 pos = skb_put(skb, rates_len - count + 2);
 740                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 741                 *pos++ = rates_len - count;
 742
 743                 for (i++; i < sband->n_bitrates; i++) {
 744                         if (BIT(i) & rates) {
 745                                 int rate;
 746                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 747                                                     5 * (1 << shift));
 748                                 *pos++ = (u8) rate;
 749                         }
 750                 }
 751         }
 752
 753         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 754             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 755                 pos = skb_put(skb, 4);
 756                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 757                 *pos++ = 2;
 758                 *pos++ = 0; /* min tx power */
 759                  /* max tx power */
 760                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 761         }
 762
 763         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 764                 /* TODO: get this in reg domain format */
 765                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 766                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 767                 *pos++ = 2 * sband->n_channels;
 768                 for (i = 0; i < sband->n_channels; i++) {
 769                         *pos++ = ieee80211_frequency_to_channel(
 770                                         sband->channels[i].center_freq);
 771                         *pos++ = 1; /* one channel in the subband*/
 772                 }
 773         }
 774
 775         /* if present, add any custom IEs that go before HT */
 776         if (assoc_data->ie_len) {
 777                 static const u8 before_ht[] = {
 778                         WLAN_EID_SSID,
 779                         WLAN_EID_SUPP_RATES,
 780                         WLAN_EID_EXT_SUPP_RATES,
 781                         WLAN_EID_PWR_CAPABILITY,
 782                         WLAN_EID_SUPPORTED_CHANNELS,
 783                         WLAN_EID_RSN,
 784                         WLAN_EID_QOS_CAPA,
 785                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 786                         WLAN_EID_MOBILITY_DOMAIN,
 787                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 788                         WLAN_EID_RIC_DATA,              /* reassoc only */
 789                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 790                 };
 791                 static const u8 after_ric[] = {
 792                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 793                         WLAN_EID_HT_CAPABILITY,
 794                         WLAN_EID_BSS_COEX_2040,
 795                         WLAN_EID_EXT_CAPABILITY,
 796                         WLAN_EID_QOS_TRAFFIC_CAPA,
 797                         WLAN_EID_TIM_BCAST_REQ,
 798                         WLAN_EID_INTERWORKING,
 799                         /* 60GHz doesn't happen right now */
 800                         WLAN_EID_VHT_CAPABILITY,
 801                         WLAN_EID_OPMODE_NOTIF,
 802                 };
 803
 804                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 805                                                  assoc_data->ie_len,
 806                                                  before_ht,
 807                                                  ARRAY_SIZE(before_ht),
 808                                                  after_ric,
 809                                                  ARRAY_SIZE(after_ric),
 810                                                  offset);
 811                 pos = skb_put(skb, noffset - offset);
 812                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 813                 offset = noffset;
 814         }
 815
 816         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 817                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 818                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 819
 820         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 821                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 822                                     sband, chan, sdata->smps_mode);
 823
 824         /* if present, add any custom IEs that go before VHT */
 825         if (assoc_data->ie_len) {
 826                 static const u8 before_vht[] = {
 827                         WLAN_EID_SSID,
 828                         WLAN_EID_SUPP_RATES,
 829                         WLAN_EID_EXT_SUPP_RATES,
 830                         WLAN_EID_PWR_CAPABILITY,
 831                         WLAN_EID_SUPPORTED_CHANNELS,
 832                         WLAN_EID_RSN,
 833                         WLAN_EID_QOS_CAPA,
 834                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 835                         WLAN_EID_MOBILITY_DOMAIN,
 836                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 837                         WLAN_EID_HT_CAPABILITY,
 838                         WLAN_EID_BSS_COEX_2040,
 839                         WLAN_EID_EXT_CAPABILITY,
 840                         WLAN_EID_QOS_TRAFFIC_CAPA,
 841                         WLAN_EID_TIM_BCAST_REQ,
 842                         WLAN_EID_INTERWORKING,
 843                 };
 844
 845                 /* RIC already taken above, so no need to handle here anymore */
 846                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 847                                              before_vht, ARRAY_SIZE(before_vht),
 848                                              offset);
 849                 pos = skb_put(skb, noffset - offset);
 850                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 851                 offset = noffset;
 852         }
 853
 854         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 855                 ieee80211_add_vht_ie(sdata, skb, sband,
 856                                      &assoc_data->ap_vht_cap);
 857
 858         /* if present, add any custom non-vendor IEs that go after HT */
 859         if (assoc_data->ie_len) {
 860                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 861                                                     assoc_data->ie_len,
 862                                                     offset);
 863                 pos = skb_put(skb, noffset - offset);
 864                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 865                 offset = noffset;
 866         }
 867
 868         if (assoc_data->wmm) {
 869                 if (assoc_data->uapsd) {
 870                         qos_info = ifmgd->uapsd_queues;
 871                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 872                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 873                 } else {
 874                         qos_info = 0;
 875                 }
 876
 877                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 878         }
 879
 880         /* add any remaining custom (i.e. vendor specific here) IEs */
 881         if (assoc_data->ie_len) {
 882                 noffset = assoc_data->ie_len;
 883                 pos = skb_put(skb, noffset - offset);
 884                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 885         }
 886
 887         drv_mgd_prepare_tx(local, sdata);
 888
 889         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 890         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 891                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 892                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 893         ieee80211_tx_skb(sdata, skb);
 894 }
 895
 896 void ieee80211_send_pspoll(struct ieee80211_local *local,
 897                            struct ieee80211_sub_if_data *sdata)
 898 {
 899         struct ieee80211_pspoll *pspoll;
 900         struct sk_buff *skb;
 901
 902         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 903         if (!skb)
 904                 return;
 905
 906         pspoll = (struct ieee80211_pspoll *) skb->data;
 907         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 908
 909         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 910         ieee80211_tx_skb(sdata, skb);
 911 }
 912
 913 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 914                              struct ieee80211_sub_if_data *sdata,
 915                              int powersave)
 916 {
 917         struct sk_buff *skb;
 918         struct ieee80211_hdr_3addr *nullfunc;
 919         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 920
 921         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 922         if (!skb)
 923                 return;
 924
 925         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 926         if (powersave)
 927                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 928
 929         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 930                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 931
 932         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 933                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 934
 935         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 936                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 937
 938         ieee80211_tx_skb(sdata, skb);
 939 }
 940
 941 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 942                                           struct ieee80211_sub_if_data *sdata)
 943 {
 944         struct sk_buff *skb;
 945         struct ieee80211_hdr *nullfunc;
 946         __le16 fc;
 947
 948         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 949                 return;
 950
 951         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 952         if (!skb)
 953                 return;
 954
 955         skb_reserve(skb, local->hw.extra_tx_headroom);
 956
 957         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 958         memset(nullfunc, 0, 30);
 959         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 960                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 961         nullfunc->frame_control = fc;
 962         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 963         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 964         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 965         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 966
 967         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 968         ieee80211_tx_skb(sdata, skb);
 969 }
 970
 971 /* spectrum management related things */
 972 static void ieee80211_chswitch_work(struct work_struct *work)
 973 {
 974         struct ieee80211_sub_if_data *sdata =
 975                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 976         struct ieee80211_local *local = sdata->local;
 977         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 978         int ret;
 979
 980         if (!ieee80211_sdata_running(sdata))
 981                 return;
 982
 983         sdata_lock(sdata);
 984         mutex_lock(&local->mtx);
 985         mutex_lock(&local->chanctx_mtx);
 986
 987         if (!ifmgd->associated)
 988                 goto out;
 989
 990         if (!sdata->vif.csa_active)
 991                 goto out;
 992
 993         /*
 994          * using reservation isn't immediate as it may be deferred until later
 995          * with multi-vif. once reservation is complete it will re-schedule the
 996          * work with no reserved_chanctx so verify chandef to check if it
 997          * completed successfully
 998          */
 999
1000         if (sdata->reserved_chanctx) {
1001                 /*
1002                  * with multi-vif csa driver may call ieee80211_csa_finish()
1003                  * many times while waiting for other interfaces to use their
1004                  * reservations
1005                  */
1006                 if (sdata->reserved_ready)
1007                         goto out;
1008
1009                 ret = ieee80211_vif_use_reserved_context(sdata);
1010                 if (ret) {
1011                         sdata_info(sdata,
1012                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1013                                    ret);
1014                         ieee80211_queue_work(&sdata->local->hw,
1015                                              &ifmgd->csa_connection_drop_work);
1016                         goto out;
1017                 }
1018
1019                 goto out;
1020         }
1021
1022         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1023                                         &sdata->csa_chandef)) {
1024                 sdata_info(sdata,
1025                            "failed to finalize channel switch, disconnecting\n");
1026                 ieee80211_queue_work(&sdata->local->hw,
1027                                      &ifmgd->csa_connection_drop_work);
1028                 goto out;
1029         }
1030
1031         /* XXX: shouldn't really modify cfg80211-owned data! */
1032         ifmgd->associated->channel = sdata->csa_chandef.chan;
1033
1034         ifmgd->csa_waiting_bcn = true;
1035
1036         ieee80211_sta_reset_beacon_monitor(sdata);
1037         ieee80211_sta_reset_conn_monitor(sdata);
1038
1039 out:
1040         mutex_unlock(&local->chanctx_mtx);
1041         mutex_unlock(&local->mtx);
1042         sdata_unlock(sdata);
1043 }
1044
1045 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1046 {
1047         struct ieee80211_local *local = sdata->local;
1048         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1049         int ret;
1050
1051         sdata_assert_lock(sdata);
1052
1053         WARN_ON(!sdata->vif.csa_active);
1054
1055         if (sdata->csa_block_tx) {
1056                 ieee80211_wake_vif_queues(local, sdata,
1057                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1058                 sdata->csa_block_tx = false;
1059         }
1060
1061         sdata->vif.csa_active = false;
1062         ifmgd->csa_waiting_bcn = false;
1063
1064         ret = drv_post_channel_switch(sdata);
1065         if (ret) {
1066                 sdata_info(sdata,
1067                            "driver post channel switch failed, disconnecting\n");
1068                 ieee80211_queue_work(&local->hw,
1069                                      &ifmgd->csa_connection_drop_work);
1070                 return;
1071         }
1072
1073         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1074 }
1075
1076 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1077 {
1078         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1079         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1080
1081         trace_api_chswitch_done(sdata, success);
1082         if (!success) {
1083                 sdata_info(sdata,
1084                            "driver channel switch failed, disconnecting\n");
1085                 ieee80211_queue_work(&sdata->local->hw,
1086                                      &ifmgd->csa_connection_drop_work);
1087         } else {
1088                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1089         }
1090 }
1091 EXPORT_SYMBOL(ieee80211_chswitch_done);
1092
1093 static void ieee80211_chswitch_timer(unsigned long data)
1094 {
1095         struct ieee80211_sub_if_data *sdata =
1096                 (struct ieee80211_sub_if_data *) data;
1097
1098         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1099 }
1100
1101 static void
1102 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1103                                  u64 timestamp, u32 device_timestamp,
1104                                  struct ieee802_11_elems *elems,
1105                                  bool beacon)
1106 {
1107         struct ieee80211_local *local = sdata->local;
1108         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1109         struct cfg80211_bss *cbss = ifmgd->associated;
1110         struct ieee80211_chanctx_conf *conf;
1111         struct ieee80211_chanctx *chanctx;
1112         enum ieee80211_band current_band;
1113         struct ieee80211_csa_ie csa_ie;
1114         struct ieee80211_channel_switch ch_switch;
1115         int res;
1116
1117         sdata_assert_lock(sdata);
1118
1119         if (!cbss)
1120                 return;
1121
1122         if (local->scanning)
1123                 return;
1124
1125         /* disregard subsequent announcements if we are already processing */
1126         if (sdata->vif.csa_active)
1127                 return;
1128
1129         current_band = cbss->channel->band;
1130         memset(&csa_ie, 0, sizeof(csa_ie));
1131         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1132                                            ifmgd->flags,
1133                                            ifmgd->associated->bssid, &csa_ie);
1134         if (res < 0)
1135                 ieee80211_queue_work(&local->hw,
1136                                      &ifmgd->csa_connection_drop_work);
1137         if (res)
1138                 return;
1139
1140         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1141                                      IEEE80211_CHAN_DISABLED)) {
1142                 sdata_info(sdata,
1143                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1144                            ifmgd->associated->bssid,
1145                            csa_ie.chandef.chan->center_freq,
1146                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1147                            csa_ie.chandef.center_freq2);
1148                 ieee80211_queue_work(&local->hw,
1149                                      &ifmgd->csa_connection_drop_work);
1150                 return;
1151         }
1152
1153         mutex_lock(&local->mtx);
1154         mutex_lock(&local->chanctx_mtx);
1155         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1156                                          lockdep_is_held(&local->chanctx_mtx));
1157         if (!conf) {
1158                 sdata_info(sdata,
1159                            "no channel context assigned to vif?, disconnecting\n");
1160                 goto drop_connection;
1161         }
1162
1163         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1164
1165         if (local->use_chanctx &&
1166             !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1167                 sdata_info(sdata,
1168                            "driver doesn't support chan-switch with channel contexts\n");
1169                 goto drop_connection;
1170         }
1171
1172         ch_switch.timestamp = timestamp;
1173         ch_switch.device_timestamp = device_timestamp;
1174         ch_switch.block_tx = csa_ie.mode;
1175         ch_switch.chandef = csa_ie.chandef;
1176         ch_switch.count = csa_ie.count;
1177
1178         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1179                 sdata_info(sdata,
1180                            "preparing for channel switch failed, disconnecting\n");
1181                 goto drop_connection;
1182         }
1183
1184         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1185                                             chanctx->mode, false);
1186         if (res) {
1187                 sdata_info(sdata,
1188                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1189                            res);
1190                 goto drop_connection;
1191         }
1192         mutex_unlock(&local->chanctx_mtx);
1193
1194         sdata->vif.csa_active = true;
1195         sdata->csa_chandef = csa_ie.chandef;
1196         sdata->csa_block_tx = csa_ie.mode;
1197
1198         if (sdata->csa_block_tx)
1199                 ieee80211_stop_vif_queues(local, sdata,
1200                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1201         mutex_unlock(&local->mtx);
1202
1203         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1204                                           csa_ie.count);
1205
1206         if (local->ops->channel_switch) {
1207                 /* use driver's channel switch callback */
1208                 drv_channel_switch(local, sdata, &ch_switch);
1209                 return;
1210         }
1211
1212         /* channel switch handled in software */
1213         if (csa_ie.count <= 1)
1214                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1215         else
1216                 mod_timer(&ifmgd->chswitch_timer,
1217                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1218                                          cbss->beacon_interval));
1219         return;
1220  drop_connection:
1221         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1222         mutex_unlock(&local->chanctx_mtx);
1223         mutex_unlock(&local->mtx);
1224 }
1225
1226 static bool
1227 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1228                                  struct ieee80211_channel *channel,
1229                                  const u8 *country_ie, u8 country_ie_len,
1230                                  const u8 *pwr_constr_elem,
1231                                  int *chan_pwr, int *pwr_reduction)
1232 {
1233         struct ieee80211_country_ie_triplet *triplet;
1234         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1235         int i, chan_increment;
1236         bool have_chan_pwr = false;
1237
1238         /* Invalid IE */
1239         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1240                 return false;
1241
1242         triplet = (void *)(country_ie + 3);
1243         country_ie_len -= 3;
1244
1245         switch (channel->band) {
1246         default:
1247                 WARN_ON_ONCE(1);
1248                 /* fall through */
1249         case IEEE80211_BAND_2GHZ:
1250         case IEEE80211_BAND_60GHZ:
1251                 chan_increment = 1;
1252                 break;
1253         case IEEE80211_BAND_5GHZ:
1254                 chan_increment = 4;
1255                 break;
1256         }
1257
1258         /* find channel */
1259         while (country_ie_len >= 3) {
1260                 u8 first_channel = triplet->chans.first_channel;
1261
1262                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1263                         goto next;
1264
1265                 for (i = 0; i < triplet->chans.num_channels; i++) {
1266                         if (first_channel + i * chan_increment == chan) {
1267                                 have_chan_pwr = true;
1268                                 *chan_pwr = triplet->chans.max_power;
1269                                 break;
1270                         }
1271                 }
1272                 if (have_chan_pwr)
1273                         break;
1274
1275  next:
1276                 triplet++;
1277                 country_ie_len -= 3;
1278         }
1279
1280         if (have_chan_pwr && pwr_constr_elem)
1281                 *pwr_reduction = *pwr_constr_elem;
1282         else
1283                 *pwr_reduction = 0;
1284
1285         return have_chan_pwr;
1286 }
1287
1288 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1289                                       struct ieee80211_channel *channel,
1290                                       const u8 *cisco_dtpc_ie,
1291                                       int *pwr_level)
1292 {
1293         /* From practical testing, the first data byte of the DTPC element
1294          * seems to contain the requested dBm level, and the CLI on Cisco
1295          * APs clearly state the range is -127 to 127 dBm, which indicates
1296          * a signed byte, although it seemingly never actually goes negative.
1297          * The other byte seems to always be zero.
1298          */
1299         *pwr_level = (__s8)cisco_dtpc_ie[4];
1300 }
1301
1302 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1303                                        struct ieee80211_channel *channel,
1304                                        struct ieee80211_mgmt *mgmt,
1305                                        const u8 *country_ie, u8 country_ie_len,
1306                                        const u8 *pwr_constr_ie,
1307                                        const u8 *cisco_dtpc_ie)
1308 {
1309         bool has_80211h_pwr = false, has_cisco_pwr = false;
1310         int chan_pwr = 0, pwr_reduction_80211h = 0;
1311         int pwr_level_cisco, pwr_level_80211h;
1312         int new_ap_level;
1313         __le16 capab = mgmt->u.probe_resp.capab_info;
1314
1315         if (country_ie &&
1316             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1317              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1318                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1319                         sdata, channel, country_ie, country_ie_len,
1320                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1321                 pwr_level_80211h =
1322                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1323         }
1324
1325         if (cisco_dtpc_ie) {
1326                 ieee80211_find_cisco_dtpc(
1327                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1328                 has_cisco_pwr = true;
1329         }
1330
1331         if (!has_80211h_pwr && !has_cisco_pwr)
1332                 return 0;
1333
1334         /* If we have both 802.11h and Cisco DTPC, apply both limits
1335          * by picking the smallest of the two power levels advertised.
1336          */
1337         if (has_80211h_pwr &&
1338             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1339                 sdata_info(sdata,
1340                            "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1341                            pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1342                            sdata->u.mgd.bssid);
1343                 new_ap_level = pwr_level_80211h;
1344         } else {  /* has_cisco_pwr is always true here. */
1345                 sdata_info(sdata,
1346                            "Limiting TX power to %d dBm as advertised by %pM\n",
1347                            pwr_level_cisco, sdata->u.mgd.bssid);
1348                 new_ap_level = pwr_level_cisco;
1349         }
1350
1351         if (sdata->ap_power_level == new_ap_level)
1352                 return 0;
1353
1354         sdata->ap_power_level = new_ap_level;
1355         if (__ieee80211_recalc_txpower(sdata))
1356                 return BSS_CHANGED_TXPOWER;
1357         return 0;
1358 }
1359
1360 /* powersave */
1361 static void ieee80211_enable_ps(struct ieee80211_local *local,
1362                                 struct ieee80211_sub_if_data *sdata)
1363 {
1364         struct ieee80211_conf *conf = &local->hw.conf;
1365
1366         /*
1367          * If we are scanning right now then the parameters will
1368          * take effect when scan finishes.
1369          */
1370         if (local->scanning)
1371                 return;
1372
1373         if (conf->dynamic_ps_timeout > 0 &&
1374             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1375                 mod_timer(&local->dynamic_ps_timer, jiffies +
1376                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1377         } else {
1378                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1379                         ieee80211_send_nullfunc(local, sdata, 1);
1380
1381                 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1382                     (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1383                         return;
1384
1385                 conf->flags |= IEEE80211_CONF_PS;
1386                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1387         }
1388 }
1389
1390 static void ieee80211_change_ps(struct ieee80211_local *local)
1391 {
1392         struct ieee80211_conf *conf = &local->hw.conf;
1393
1394         if (local->ps_sdata) {
1395                 ieee80211_enable_ps(local, local->ps_sdata);
1396         } else if (conf->flags & IEEE80211_CONF_PS) {
1397                 conf->flags &= ~IEEE80211_CONF_PS;
1398                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1399                 del_timer_sync(&local->dynamic_ps_timer);
1400                 cancel_work_sync(&local->dynamic_ps_enable_work);
1401         }
1402 }
1403
1404 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1405 {
1406         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1407         struct sta_info *sta = NULL;
1408         bool authorized = false;
1409
1410         if (!mgd->powersave)
1411                 return false;
1412
1413         if (mgd->broken_ap)
1414                 return false;
1415
1416         if (!mgd->associated)
1417                 return false;
1418
1419         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1420                 return false;
1421
1422         if (!mgd->have_beacon)
1423                 return false;
1424
1425         rcu_read_lock();
1426         sta = sta_info_get(sdata, mgd->bssid);
1427         if (sta)
1428                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1429         rcu_read_unlock();
1430
1431         return authorized;
1432 }
1433
1434 /* need to hold RTNL or interface lock */
1435 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1436 {
1437         struct ieee80211_sub_if_data *sdata, *found = NULL;
1438         int count = 0;
1439         int timeout;
1440
1441         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1442                 local->ps_sdata = NULL;
1443                 return;
1444         }
1445
1446         list_for_each_entry(sdata, &local->interfaces, list) {
1447                 if (!ieee80211_sdata_running(sdata))
1448                         continue;
1449                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1450                         /* If an AP vif is found, then disable PS
1451                          * by setting the count to zero thereby setting
1452                          * ps_sdata to NULL.
1453                          */
1454                         count = 0;
1455                         break;
1456                 }
1457                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1458                         continue;
1459                 found = sdata;
1460                 count++;
1461         }
1462
1463         if (count == 1 && ieee80211_powersave_allowed(found)) {
1464                 s32 beaconint_us;
1465
1466                 if (latency < 0)
1467                         latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1468
1469                 beaconint_us = ieee80211_tu_to_usec(
1470                                         found->vif.bss_conf.beacon_int);
1471
1472                 timeout = local->dynamic_ps_forced_timeout;
1473                 if (timeout < 0) {
1474                         /*
1475                          * Go to full PSM if the user configures a very low
1476                          * latency requirement.
1477                          * The 2000 second value is there for compatibility
1478                          * until the PM_QOS_NETWORK_LATENCY is configured
1479                          * with real values.
1480                          */
1481                         if (latency > (1900 * USEC_PER_MSEC) &&
1482                             latency != (2000 * USEC_PER_SEC))
1483                                 timeout = 0;
1484                         else
1485                                 timeout = 100;
1486                 }
1487                 local->hw.conf.dynamic_ps_timeout = timeout;
1488
1489                 if (beaconint_us > latency) {
1490                         local->ps_sdata = NULL;
1491                 } else {
1492                         int maxslp = 1;
1493                         u8 dtimper = found->u.mgd.dtim_period;
1494
1495                         /* If the TIM IE is invalid, pretend the value is 1 */
1496                         if (!dtimper)
1497                                 dtimper = 1;
1498                         else if (dtimper > 1)
1499                                 maxslp = min_t(int, dtimper,
1500                                                     latency / beaconint_us);
1501
1502                         local->hw.conf.max_sleep_period = maxslp;
1503                         local->hw.conf.ps_dtim_period = dtimper;
1504                         local->ps_sdata = found;
1505                 }
1506         } else {
1507                 local->ps_sdata = NULL;
1508         }
1509
1510         ieee80211_change_ps(local);
1511 }
1512
1513 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1514 {
1515         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1516
1517         if (sdata->vif.bss_conf.ps != ps_allowed) {
1518                 sdata->vif.bss_conf.ps = ps_allowed;
1519                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1520         }
1521 }
1522
1523 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1524 {
1525         struct ieee80211_local *local =
1526                 container_of(work, struct ieee80211_local,
1527                              dynamic_ps_disable_work);
1528
1529         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1530                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1531                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1532         }
1533
1534         ieee80211_wake_queues_by_reason(&local->hw,
1535                                         IEEE80211_MAX_QUEUE_MAP,
1536                                         IEEE80211_QUEUE_STOP_REASON_PS,
1537                                         false);
1538 }
1539
1540 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1541 {
1542         struct ieee80211_local *local =
1543                 container_of(work, struct ieee80211_local,
1544                              dynamic_ps_enable_work);
1545         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1546         struct ieee80211_if_managed *ifmgd;
1547         unsigned long flags;
1548         int q;
1549
1550         /* can only happen when PS was just disabled anyway */
1551         if (!sdata)
1552                 return;
1553
1554         ifmgd = &sdata->u.mgd;
1555
1556         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1557                 return;
1558
1559         if (local->hw.conf.dynamic_ps_timeout > 0) {
1560                 /* don't enter PS if TX frames are pending */
1561                 if (drv_tx_frames_pending(local)) {
1562                         mod_timer(&local->dynamic_ps_timer, jiffies +
1563                                   msecs_to_jiffies(
1564                                   local->hw.conf.dynamic_ps_timeout));
1565                         return;
1566                 }
1567
1568                 /*
1569                  * transmission can be stopped by others which leads to
1570                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1571                  * is not the actual idle state.
1572                  */
1573                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1574                 for (q = 0; q < local->hw.queues; q++) {
1575                         if (local->queue_stop_reasons[q]) {
1576                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1577                                                        flags);
1578                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1579                                           msecs_to_jiffies(
1580                                           local->hw.conf.dynamic_ps_timeout));
1581                                 return;
1582                         }
1583                 }
1584                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1585         }
1586
1587         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1588             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1589                 if (drv_tx_frames_pending(local)) {
1590                         mod_timer(&local->dynamic_ps_timer, jiffies +
1591                                   msecs_to_jiffies(
1592                                   local->hw.conf.dynamic_ps_timeout));
1593                 } else {
1594                         ieee80211_send_nullfunc(local, sdata, 1);
1595                         /* Flush to get the tx status of nullfunc frame */
1596                         ieee80211_flush_queues(local, sdata, false);
1597                 }
1598         }
1599
1600         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1601               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1602             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1603                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1604                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1605                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1606         }
1607 }
1608
1609 void ieee80211_dynamic_ps_timer(unsigned long data)
1610 {
1611         struct ieee80211_local *local = (void *) data;
1612
1613         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1614 }
1615
1616 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1617 {
1618         struct delayed_work *delayed_work =
1619                 container_of(work, struct delayed_work, work);
1620         struct ieee80211_sub_if_data *sdata =
1621                 container_of(delayed_work, struct ieee80211_sub_if_data,
1622                              dfs_cac_timer_work);
1623         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1624
1625         mutex_lock(&sdata->local->mtx);
1626         if (sdata->wdev.cac_started) {
1627                 ieee80211_vif_release_channel(sdata);
1628                 cfg80211_cac_event(sdata->dev, &chandef,
1629                                    NL80211_RADAR_CAC_FINISHED,
1630                                    GFP_KERNEL);
1631         }
1632         mutex_unlock(&sdata->local->mtx);
1633 }
1634
1635 static bool
1636 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1637 {
1638         struct ieee80211_local *local = sdata->local;
1639         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1640         bool ret = false;
1641         int ac;
1642
1643         if (local->hw.queues < IEEE80211_NUM_ACS)
1644                 return false;
1645
1646         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1647                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1648                 int non_acm_ac;
1649                 unsigned long now = jiffies;
1650
1651                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1652                     tx_tspec->admitted_time &&
1653                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1654                         tx_tspec->consumed_tx_time = 0;
1655                         tx_tspec->time_slice_start = now;
1656
1657                         if (tx_tspec->downgraded)
1658                                 tx_tspec->action =
1659                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1660                 }
1661
1662                 switch (tx_tspec->action) {
1663                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1664                         /* take the original parameters */
1665                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1666                                 sdata_err(sdata,
1667                                           "failed to set TX queue parameters for queue %d\n",
1668                                           ac);
1669                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1670                         tx_tspec->downgraded = false;
1671                         ret = true;
1672                         break;
1673                 case TX_TSPEC_ACTION_DOWNGRADE:
1674                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1675                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1676                                 ret = true;
1677                                 break;
1678                         }
1679                         /* downgrade next lower non-ACM AC */
1680                         for (non_acm_ac = ac + 1;
1681                              non_acm_ac < IEEE80211_NUM_ACS;
1682                              non_acm_ac++)
1683                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1684                                         break;
1685                         /* The loop will result in using BK even if it requires
1686                          * admission control, such configuration makes no sense
1687                          * and we have to transmit somehow - the AC selection
1688                          * does the same thing.
1689                          */
1690                         if (drv_conf_tx(local, sdata, ac,
1691                                         &sdata->tx_conf[non_acm_ac]))
1692                                 sdata_err(sdata,
1693                                           "failed to set TX queue parameters for queue %d\n",
1694                                           ac);
1695                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1696                         ret = true;
1697                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1698                                 tx_tspec->time_slice_start + HZ - now + 1);
1699                         break;
1700                 case TX_TSPEC_ACTION_NONE:
1701                         /* nothing now */
1702                         break;
1703                 }
1704         }
1705
1706         return ret;
1707 }
1708
1709 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1710 {
1711         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1712                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1713 }
1714
1715 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1716 {
1717         struct ieee80211_sub_if_data *sdata;
1718
1719         sdata = container_of(work, struct ieee80211_sub_if_data,
1720                              u.mgd.tx_tspec_wk.work);
1721         ieee80211_sta_handle_tspec_ac_params(sdata);
1722 }
1723
1724 /* MLME */
1725 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1726                                      struct ieee80211_sub_if_data *sdata,
1727                                      const u8 *wmm_param, size_t wmm_param_len)
1728 {
1729         struct ieee80211_tx_queue_params params;
1730         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1731         size_t left;
1732         int count;
1733         const u8 *pos;
1734         u8 uapsd_queues = 0;
1735
1736         if (!local->ops->conf_tx)
1737                 return false;
1738
1739         if (local->hw.queues < IEEE80211_NUM_ACS)
1740                 return false;
1741
1742         if (!wmm_param)
1743                 return false;
1744
1745         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1746                 return false;
1747
1748         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1749                 uapsd_queues = ifmgd->uapsd_queues;
1750
1751         count = wmm_param[6] & 0x0f;
1752         if (count == ifmgd->wmm_last_param_set)
1753                 return false;
1754         ifmgd->wmm_last_param_set = count;
1755
1756         pos = wmm_param + 8;
1757         left = wmm_param_len - 8;
1758
1759         memset(&params, 0, sizeof(params));
1760
1761         sdata->wmm_acm = 0;
1762         for (; left >= 4; left -= 4, pos += 4) {
1763                 int aci = (pos[0] >> 5) & 0x03;
1764                 int acm = (pos[0] >> 4) & 0x01;
1765                 bool uapsd = false;
1766                 int queue;
1767
1768                 switch (aci) {
1769                 case 1: /* AC_BK */
1770                         queue = 3;
1771                         if (acm)
1772                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1773                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1774                                 uapsd = true;
1775                         break;
1776                 case 2: /* AC_VI */
1777                         queue = 1;
1778                         if (acm)
1779                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1780                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1781                                 uapsd = true;
1782                         break;
1783                 case 3: /* AC_VO */
1784                         queue = 0;
1785                         if (acm)
1786                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1787                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1788                                 uapsd = true;
1789                         break;
1790                 case 0: /* AC_BE */
1791                 default:
1792                         queue = 2;
1793                         if (acm)
1794                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1795                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1796                                 uapsd = true;
1797                         break;
1798                 }
1799
1800                 params.aifs = pos[0] & 0x0f;
1801                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1802                 params.cw_min = ecw2cw(pos[1] & 0x0f);
1803                 params.txop = get_unaligned_le16(pos + 2);
1804                 params.acm = acm;
1805                 params.uapsd = uapsd;
1806
1807                 mlme_dbg(sdata,
1808                          "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1809                          queue, aci, acm,
1810                          params.aifs, params.cw_min, params.cw_max,
1811                          params.txop, params.uapsd,
1812                          ifmgd->tx_tspec[queue].downgraded);
1813                 sdata->tx_conf[queue] = params;
1814                 if (!ifmgd->tx_tspec[queue].downgraded &&
1815                     drv_conf_tx(local, sdata, queue, &params))
1816                         sdata_err(sdata,
1817                                   "failed to set TX queue parameters for queue %d\n",
1818                                   queue);
1819         }
1820
1821         /* enable WMM or activate new settings */
1822         sdata->vif.bss_conf.qos = true;
1823         return true;
1824 }
1825
1826 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1827 {
1828         lockdep_assert_held(&sdata->local->mtx);
1829
1830         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1831         ieee80211_run_deferred_scan(sdata->local);
1832 }
1833
1834 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1835 {
1836         mutex_lock(&sdata->local->mtx);
1837         __ieee80211_stop_poll(sdata);
1838         mutex_unlock(&sdata->local->mtx);
1839 }
1840
1841 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1842                                            u16 capab, bool erp_valid, u8 erp)
1843 {
1844         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1845         u32 changed = 0;
1846         bool use_protection;
1847         bool use_short_preamble;
1848         bool use_short_slot;
1849
1850         if (erp_valid) {
1851                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1852                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1853         } else {
1854                 use_protection = false;
1855                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1856         }
1857
1858         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1859         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1860                 use_short_slot = true;
1861
1862         if (use_protection != bss_conf->use_cts_prot) {
1863                 bss_conf->use_cts_prot = use_protection;
1864                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1865         }
1866
1867         if (use_short_preamble != bss_conf->use_short_preamble) {
1868                 bss_conf->use_short_preamble = use_short_preamble;
1869                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1870         }
1871
1872         if (use_short_slot != bss_conf->use_short_slot) {
1873                 bss_conf->use_short_slot = use_short_slot;
1874                 changed |= BSS_CHANGED_ERP_SLOT;
1875         }
1876
1877         return changed;
1878 }
1879
1880 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1881                                      struct cfg80211_bss *cbss,
1882                                      u32 bss_info_changed)
1883 {
1884         struct ieee80211_bss *bss = (void *)cbss->priv;
1885         struct ieee80211_local *local = sdata->local;
1886         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1887
1888         bss_info_changed |= BSS_CHANGED_ASSOC;
1889         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1890                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1891
1892         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1893                 beacon_loss_count * bss_conf->beacon_int));
1894
1895         sdata->u.mgd.associated = cbss;
1896         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1897
1898         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1899
1900         if (sdata->vif.p2p) {
1901                 const struct cfg80211_bss_ies *ies;
1902
1903                 rcu_read_lock();
1904                 ies = rcu_dereference(cbss->ies);
1905                 if (ies) {
1906                         int ret;
1907
1908                         ret = cfg80211_get_p2p_attr(
1909                                         ies->data, ies->len,
1910                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1911                                         (u8 *) &bss_conf->p2p_noa_attr,
1912                                         sizeof(bss_conf->p2p_noa_attr));
1913                         if (ret >= 2) {
1914                                 sdata->u.mgd.p2p_noa_index =
1915                                         bss_conf->p2p_noa_attr.index;
1916                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1917                         }
1918                 }
1919                 rcu_read_unlock();
1920         }
1921
1922         /* just to be sure */
1923         ieee80211_stop_poll(sdata);
1924
1925         ieee80211_led_assoc(local, 1);
1926
1927         if (sdata->u.mgd.have_beacon) {
1928                 /*
1929                  * If the AP is buggy we may get here with no DTIM period
1930                  * known, so assume it's 1 which is the only safe assumption
1931                  * in that case, although if the TIM IE is broken powersave
1932                  * probably just won't work at all.
1933                  */
1934                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1935                 bss_conf->beacon_rate = bss->beacon_rate;
1936                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1937         } else {
1938                 bss_conf->beacon_rate = NULL;
1939                 bss_conf->dtim_period = 0;
1940         }
1941
1942         bss_conf->assoc = 1;
1943
1944         /* Tell the driver to monitor connection quality (if supported) */
1945         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1946             bss_conf->cqm_rssi_thold)
1947                 bss_info_changed |= BSS_CHANGED_CQM;
1948
1949         /* Enable ARP filtering */
1950         if (bss_conf->arp_addr_cnt)
1951                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1952
1953         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1954
1955         mutex_lock(&local->iflist_mtx);
1956         ieee80211_recalc_ps(local, -1);
1957         mutex_unlock(&local->iflist_mtx);
1958
1959         ieee80211_recalc_smps(sdata);
1960         ieee80211_recalc_ps_vif(sdata);
1961
1962         netif_carrier_on(sdata->dev);
1963 }
1964
1965 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1966                                    u16 stype, u16 reason, bool tx,
1967                                    u8 *frame_buf)
1968 {
1969         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1970         struct ieee80211_local *local = sdata->local;
1971         u32 changed = 0;
1972
1973         sdata_assert_lock(sdata);
1974
1975         if (WARN_ON_ONCE(tx && !frame_buf))
1976                 return;
1977
1978         if (WARN_ON(!ifmgd->associated))
1979                 return;
1980
1981         ieee80211_stop_poll(sdata);
1982
1983         ifmgd->associated = NULL;
1984         netif_carrier_off(sdata->dev);
1985
1986         /*
1987          * if we want to get out of ps before disassoc (why?) we have
1988          * to do it before sending disassoc, as otherwise the null-packet
1989          * won't be valid.
1990          */
1991         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1992                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1993                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1994         }
1995         local->ps_sdata = NULL;
1996
1997         /* disable per-vif ps */
1998         ieee80211_recalc_ps_vif(sdata);
1999
2000         /* make sure ongoing transmission finishes */
2001         synchronize_net();
2002
2003         /*
2004          * drop any frame before deauth/disassoc, this can be data or
2005          * management frame. Since we are disconnecting, we should not
2006          * insist sending these frames which can take time and delay
2007          * the disconnection and possible the roaming.
2008          */
2009         if (tx)
2010                 ieee80211_flush_queues(local, sdata, true);
2011
2012         /* deauthenticate/disassociate now */
2013         if (tx || frame_buf)
2014                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2015                                                reason, tx, frame_buf);
2016
2017         /* flush out frame - make sure the deauth was actually sent */
2018         if (tx)
2019                 ieee80211_flush_queues(local, sdata, false);
2020
2021         /* clear bssid only after building the needed mgmt frames */
2022         memset(ifmgd->bssid, 0, ETH_ALEN);
2023
2024         /* remove AP and TDLS peers */
2025         sta_info_flush(sdata);
2026
2027         /* finally reset all BSS / config parameters */
2028         changed |= ieee80211_reset_erp_info(sdata);
2029
2030         ieee80211_led_assoc(local, 0);
2031         changed |= BSS_CHANGED_ASSOC;
2032         sdata->vif.bss_conf.assoc = false;
2033
2034         ifmgd->p2p_noa_index = -1;
2035         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2036                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2037
2038         /* on the next assoc, re-program HT/VHT parameters */
2039         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2040         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2041         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2042         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2043
2044         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2045
2046         del_timer_sync(&local->dynamic_ps_timer);
2047         cancel_work_sync(&local->dynamic_ps_enable_work);
2048
2049         /* Disable ARP filtering */
2050         if (sdata->vif.bss_conf.arp_addr_cnt)
2051                 changed |= BSS_CHANGED_ARP_FILTER;
2052
2053         sdata->vif.bss_conf.qos = false;
2054         changed |= BSS_CHANGED_QOS;
2055
2056         /* The BSSID (not really interesting) and HT changed */
2057         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2058         ieee80211_bss_info_change_notify(sdata, changed);
2059
2060         /* disassociated - set to defaults now */
2061         ieee80211_set_wmm_default(sdata, false);
2062
2063         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2064         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2065         del_timer_sync(&sdata->u.mgd.timer);
2066         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2067
2068         sdata->vif.bss_conf.dtim_period = 0;
2069         sdata->vif.bss_conf.beacon_rate = NULL;
2070
2071         ifmgd->have_beacon = false;
2072
2073         ifmgd->flags = 0;
2074         mutex_lock(&local->mtx);
2075         ieee80211_vif_release_channel(sdata);
2076
2077         sdata->vif.csa_active = false;
2078         ifmgd->csa_waiting_bcn = false;
2079         if (sdata->csa_block_tx) {
2080                 ieee80211_wake_vif_queues(local, sdata,
2081                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2082                 sdata->csa_block_tx = false;
2083         }
2084         mutex_unlock(&local->mtx);
2085
2086         /* existing TX TSPEC sessions no longer exist */
2087         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2088         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2089
2090         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2091 }
2092
2093 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2094                              struct ieee80211_hdr *hdr)
2095 {
2096         /*
2097          * We can postpone the mgd.timer whenever receiving unicast frames
2098          * from AP because we know that the connection is working both ways
2099          * at that time. But multicast frames (and hence also beacons) must
2100          * be ignored here, because we need to trigger the timer during
2101          * data idle periods for sending the periodic probe request to the
2102          * AP we're connected to.
2103          */
2104         if (is_multicast_ether_addr(hdr->addr1))
2105                 return;
2106
2107         ieee80211_sta_reset_conn_monitor(sdata);
2108 }
2109
2110 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2111 {
2112         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2113         struct ieee80211_local *local = sdata->local;
2114
2115         mutex_lock(&local->mtx);
2116         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2117                 goto out;
2118
2119         __ieee80211_stop_poll(sdata);
2120
2121         mutex_lock(&local->iflist_mtx);
2122         ieee80211_recalc_ps(local, -1);
2123         mutex_unlock(&local->iflist_mtx);
2124
2125         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
2126                 goto out;
2127
2128         /*
2129          * We've received a probe response, but are not sure whether
2130          * we have or will be receiving any beacons or data, so let's
2131          * schedule the timers again, just in case.
2132          */
2133         ieee80211_sta_reset_beacon_monitor(sdata);
2134
2135         mod_timer(&ifmgd->conn_mon_timer,
2136                   round_jiffies_up(jiffies +
2137                                    IEEE80211_CONNECTION_IDLE_TIME));
2138 out:
2139         mutex_unlock(&local->mtx);
2140 }
2141
2142 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2143                                            struct ieee80211_hdr *hdr,
2144                                            u16 tx_time)
2145 {
2146         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2147         u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2148         int ac = ieee80211_ac_from_tid(tid);
2149         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2150         unsigned long now = jiffies;
2151
2152         if (likely(!tx_tspec->admitted_time))
2153                 return;
2154
2155         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2156                 tx_tspec->consumed_tx_time = 0;
2157                 tx_tspec->time_slice_start = now;
2158
2159                 if (tx_tspec->downgraded) {
2160                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2161                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2162                 }
2163         }
2164
2165         if (tx_tspec->downgraded)
2166                 return;
2167
2168         tx_tspec->consumed_tx_time += tx_time;
2169
2170         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2171                 tx_tspec->downgraded = true;
2172                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2173                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2174         }
2175 }
2176
2177 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2178                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2179 {
2180         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2181
2182         if (!ieee80211_is_data(hdr->frame_control))
2183             return;
2184
2185         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2186             sdata->u.mgd.probe_send_count > 0) {
2187                 if (ack)
2188                         ieee80211_sta_reset_conn_monitor(sdata);
2189                 else
2190                         sdata->u.mgd.nullfunc_failed = true;
2191                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2192                 return;
2193         }
2194
2195         if (ack)
2196                 ieee80211_sta_reset_conn_monitor(sdata);
2197 }
2198
2199 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2200 {
2201         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2202         const u8 *ssid;
2203         u8 *dst = ifmgd->associated->bssid;
2204         u8 unicast_limit = max(1, max_probe_tries - 3);
2205
2206         /*
2207          * Try sending broadcast probe requests for the last three
2208          * probe requests after the first ones failed since some
2209          * buggy APs only support broadcast probe requests.
2210          */
2211         if (ifmgd->probe_send_count >= unicast_limit)
2212                 dst = NULL;
2213
2214         /*
2215          * When the hardware reports an accurate Tx ACK status, it's
2216          * better to send a nullfunc frame instead of a probe request,
2217          * as it will kick us off the AP quickly if we aren't associated
2218          * anymore. The timeout will be reset if the frame is ACKed by
2219          * the AP.
2220          */
2221         ifmgd->probe_send_count++;
2222
2223         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2224                 ifmgd->nullfunc_failed = false;
2225                 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2226         } else {
2227                 int ssid_len;
2228
2229                 rcu_read_lock();
2230                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2231                 if (WARN_ON_ONCE(ssid == NULL))
2232                         ssid_len = 0;
2233                 else
2234                         ssid_len = ssid[1];
2235
2236                 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
2237                                          ssid + 2, ssid_len, NULL,
2238                                          0, (u32) -1, true, 0,
2239                                          ifmgd->associated->channel, false);
2240                 rcu_read_unlock();
2241         }
2242
2243         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2244         run_again(sdata, ifmgd->probe_timeout);
2245 }
2246
2247 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2248                                    bool beacon)
2249 {
2250         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2251         bool already = false;
2252
2253         if (!ieee80211_sdata_running(sdata))
2254                 return;
2255
2256         sdata_lock(sdata);
2257
2258         if (!ifmgd->associated)
2259                 goto out;
2260
2261         mutex_lock(&sdata->local->mtx);
2262
2263         if (sdata->local->tmp_channel || sdata->local->scanning) {
2264                 mutex_unlock(&sdata->local->mtx);
2265                 goto out;
2266         }
2267
2268         if (beacon) {
2269                 mlme_dbg_ratelimited(sdata,
2270                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2271                                      beacon_loss_count);
2272
2273                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2274         }
2275
2276         /*
2277          * The driver/our work has already reported this event or the
2278          * connection monitoring has kicked in and we have already sent
2279          * a probe request. Or maybe the AP died and the driver keeps
2280          * reporting until we disassociate...
2281          *
2282          * In either case we have to ignore the current call to this
2283          * function (except for setting the correct probe reason bit)
2284          * because otherwise we would reset the timer every time and
2285          * never check whether we received a probe response!
2286          */
2287         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2288                 already = true;
2289
2290         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2291
2292         mutex_unlock(&sdata->local->mtx);
2293
2294         if (already)
2295                 goto out;
2296
2297         mutex_lock(&sdata->local->iflist_mtx);
2298         ieee80211_recalc_ps(sdata->local, -1);
2299         mutex_unlock(&sdata->local->iflist_mtx);
2300
2301         ifmgd->probe_send_count = 0;
2302         ieee80211_mgd_probe_ap_send(sdata);
2303  out:
2304         sdata_unlock(sdata);
2305 }
2306
2307 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2308                                           struct ieee80211_vif *vif)
2309 {
2310         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2311         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2312         struct cfg80211_bss *cbss;
2313         struct sk_buff *skb;
2314         const u8 *ssid;
2315         int ssid_len;
2316
2317         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2318                 return NULL;
2319
2320         sdata_assert_lock(sdata);
2321
2322         if (ifmgd->associated)
2323                 cbss = ifmgd->associated;
2324         else if (ifmgd->auth_data)
2325                 cbss = ifmgd->auth_data->bss;
2326         else if (ifmgd->assoc_data)
2327                 cbss = ifmgd->assoc_data->bss;
2328         else
2329                 return NULL;
2330
2331         rcu_read_lock();
2332         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2333         if (WARN_ON_ONCE(ssid == NULL))
2334                 ssid_len = 0;
2335         else
2336                 ssid_len = ssid[1];
2337
2338         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2339                                         (u32) -1, cbss->channel,
2340                                         ssid + 2, ssid_len,
2341                                         NULL, 0, true);
2342         rcu_read_unlock();
2343
2344         return skb;
2345 }
2346 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2347
2348 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2349 {
2350         struct ieee80211_local *local = sdata->local;
2351         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2352         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2353
2354         sdata_lock(sdata);
2355         if (!ifmgd->associated) {
2356                 sdata_unlock(sdata);
2357                 return;
2358         }
2359
2360         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2361                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2362                                true, frame_buf);
2363         mutex_lock(&local->mtx);
2364         sdata->vif.csa_active = false;
2365         ifmgd->csa_waiting_bcn = false;
2366         if (sdata->csa_block_tx) {
2367                 ieee80211_wake_vif_queues(local, sdata,
2368                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2369                 sdata->csa_block_tx = false;
2370         }
2371         mutex_unlock(&local->mtx);
2372
2373         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2374                               IEEE80211_DEAUTH_FRAME_LEN);
2375         sdata_unlock(sdata);
2376 }
2377
2378 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2379 {
2380         struct ieee80211_sub_if_data *sdata =
2381                 container_of(work, struct ieee80211_sub_if_data,
2382                              u.mgd.beacon_connection_loss_work);
2383         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2384         struct sta_info *sta;
2385
2386         if (ifmgd->associated) {
2387                 rcu_read_lock();
2388                 sta = sta_info_get(sdata, ifmgd->bssid);
2389                 if (sta)
2390                         sta->beacon_loss_count++;
2391                 rcu_read_unlock();
2392         }
2393
2394         if (ifmgd->connection_loss) {
2395                 sdata_info(sdata, "Connection to AP %pM lost\n",
2396                            ifmgd->bssid);
2397                 __ieee80211_disconnect(sdata);
2398         } else {
2399                 ieee80211_mgd_probe_ap(sdata, true);
2400         }
2401 }
2402
2403 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2404 {
2405         struct ieee80211_sub_if_data *sdata =
2406                 container_of(work, struct ieee80211_sub_if_data,
2407                              u.mgd.csa_connection_drop_work);
2408
2409         __ieee80211_disconnect(sdata);
2410 }
2411
2412 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2413 {
2414         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2415         struct ieee80211_hw *hw = &sdata->local->hw;
2416
2417         trace_api_beacon_loss(sdata);
2418
2419         sdata->u.mgd.connection_loss = false;
2420         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2421 }
2422 EXPORT_SYMBOL(ieee80211_beacon_loss);
2423
2424 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2425 {
2426         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2427         struct ieee80211_hw *hw = &sdata->local->hw;
2428
2429         trace_api_connection_loss(sdata);
2430
2431         sdata->u.mgd.connection_loss = true;
2432         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2433 }
2434 EXPORT_SYMBOL(ieee80211_connection_loss);
2435
2436
2437 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2438                                         bool assoc)
2439 {
2440         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2441
2442         sdata_assert_lock(sdata);
2443
2444         if (!assoc) {
2445                 /*
2446                  * we are not authenticated yet, the only timer that could be
2447                  * running is the timeout for the authentication response which
2448                  * which is not relevant anymore.
2449                  */
2450                 del_timer_sync(&sdata->u.mgd.timer);
2451                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2452
2453                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2454                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2455                 sdata->u.mgd.flags = 0;
2456                 mutex_lock(&sdata->local->mtx);
2457                 ieee80211_vif_release_channel(sdata);
2458                 mutex_unlock(&sdata->local->mtx);
2459         }
2460
2461         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2462         kfree(auth_data);
2463         sdata->u.mgd.auth_data = NULL;
2464 }
2465
2466 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2467                                      struct ieee80211_mgmt *mgmt, size_t len)
2468 {
2469         struct ieee80211_local *local = sdata->local;
2470         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2471         u8 *pos;
2472         struct ieee802_11_elems elems;
2473         u32 tx_flags = 0;
2474
2475         pos = mgmt->u.auth.variable;
2476         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2477         if (!elems.challenge)
2478                 return;
2479         auth_data->expected_transaction = 4;
2480         drv_mgd_prepare_tx(sdata->local, sdata);
2481         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2482                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2483                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2484         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2485                             elems.challenge - 2, elems.challenge_len + 2,
2486                             auth_data->bss->bssid, auth_data->bss->bssid,
2487                             auth_data->key, auth_data->key_len,
2488                             auth_data->key_idx, tx_flags);
2489 }
2490
2491 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2492                                    struct ieee80211_mgmt *mgmt, size_t len)
2493 {
2494         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2495         u8 bssid[ETH_ALEN];
2496         u16 auth_alg, auth_transaction, status_code;
2497         struct sta_info *sta;
2498         struct ieee80211_event event = {
2499                 .type = MLME_EVENT,
2500                 .u.mlme.data = AUTH_EVENT,
2501         };
2502
2503         sdata_assert_lock(sdata);
2504
2505         if (len < 24 + 6)
2506                 return;
2507
2508         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2509                 return;
2510
2511         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2512
2513         if (!ether_addr_equal(bssid, mgmt->bssid))
2514                 return;
2515
2516         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2517         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2518         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2519
2520         if (auth_alg != ifmgd->auth_data->algorithm ||
2521             auth_transaction != ifmgd->auth_data->expected_transaction) {
2522                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2523                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2524                            auth_transaction,
2525                            ifmgd->auth_data->expected_transaction);
2526                 return;
2527         }
2528
2529         if (status_code != WLAN_STATUS_SUCCESS) {
2530                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2531                            mgmt->sa, status_code);
2532                 ieee80211_destroy_auth_data(sdata, false);
2533                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2534                 event.u.mlme.status = MLME_DENIED;
2535                 event.u.mlme.reason = status_code;
2536                 drv_event_callback(sdata->local, sdata, &event);
2537                 return;
2538         }
2539
2540         switch (ifmgd->auth_data->algorithm) {
2541         case WLAN_AUTH_OPEN:
2542         case WLAN_AUTH_LEAP:
2543         case WLAN_AUTH_FT:
2544         case WLAN_AUTH_SAE:
2545                 break;
2546         case WLAN_AUTH_SHARED_KEY:
2547                 if (ifmgd->auth_data->expected_transaction != 4) {
2548                         ieee80211_auth_challenge(sdata, mgmt, len);
2549                         /* need another frame */
2550                         return;
2551                 }
2552                 break;
2553         default:
2554                 WARN_ONCE(1, "invalid auth alg %d",
2555                           ifmgd->auth_data->algorithm);
2556                 return;
2557         }
2558
2559         event.u.mlme.status = MLME_SUCCESS;
2560         drv_event_callback(sdata->local, sdata, &event);
2561         sdata_info(sdata, "authenticated\n");
2562         ifmgd->auth_data->done = true;
2563         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2564         ifmgd->auth_data->timeout_started = true;
2565         run_again(sdata, ifmgd->auth_data->timeout);
2566
2567         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2568             ifmgd->auth_data->expected_transaction != 2) {
2569                 /*
2570                  * Report auth frame to user space for processing since another
2571                  * round of Authentication frames is still needed.
2572                  */
2573                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2574                 return;
2575         }
2576
2577         /* move station state to auth */
2578         mutex_lock(&sdata->local->sta_mtx);
2579         sta = sta_info_get(sdata, bssid);
2580         if (!sta) {
2581                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2582                 goto out_err;
2583         }
2584         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2585                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2586                 goto out_err;
2587         }
2588         mutex_unlock(&sdata->local->sta_mtx);
2589
2590         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2591         return;
2592  out_err:
2593         mutex_unlock(&sdata->local->sta_mtx);
2594         /* ignore frame -- wait for timeout */
2595 }
2596
2597 #define case_WLAN(type) \
2598         case WLAN_REASON_##type: return #type
2599
2600 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2601 {
2602         switch (reason_code) {
2603         case_WLAN(UNSPECIFIED);
2604         case_WLAN(PREV_AUTH_NOT_VALID);
2605         case_WLAN(DEAUTH_LEAVING);
2606         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2607         case_WLAN(DISASSOC_AP_BUSY);
2608         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2609         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2610         case_WLAN(DISASSOC_STA_HAS_LEFT);
2611         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2612         case_WLAN(DISASSOC_BAD_POWER);
2613         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2614         case_WLAN(INVALID_IE);
2615         case_WLAN(MIC_FAILURE);
2616         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2617         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2618         case_WLAN(IE_DIFFERENT);
2619         case_WLAN(INVALID_GROUP_CIPHER);
2620         case_WLAN(INVALID_PAIRWISE_CIPHER);
2621         case_WLAN(INVALID_AKMP);
2622         case_WLAN(UNSUPP_RSN_VERSION);
2623         case_WLAN(INVALID_RSN_IE_CAP);
2624         case_WLAN(IEEE8021X_FAILED);
2625         case_WLAN(CIPHER_SUITE_REJECTED);
2626         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2627         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2628         case_WLAN(DISASSOC_LOW_ACK);
2629         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2630         case_WLAN(QSTA_LEAVE_QBSS);
2631         case_WLAN(QSTA_NOT_USE);
2632         case_WLAN(QSTA_REQUIRE_SETUP);
2633         case_WLAN(QSTA_TIMEOUT);
2634         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2635         case_WLAN(MESH_PEER_CANCELED);
2636         case_WLAN(MESH_MAX_PEERS);
2637         case_WLAN(MESH_CONFIG);
2638         case_WLAN(MESH_CLOSE);
2639         case_WLAN(MESH_MAX_RETRIES);
2640         case_WLAN(MESH_CONFIRM_TIMEOUT);
2641         case_WLAN(MESH_INVALID_GTK);
2642         case_WLAN(MESH_INCONSISTENT_PARAM);
2643         case_WLAN(MESH_INVALID_SECURITY);
2644         case_WLAN(MESH_PATH_ERROR);
2645         case_WLAN(MESH_PATH_NOFORWARD);
2646         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2647         case_WLAN(MAC_EXISTS_IN_MBSS);
2648         case_WLAN(MESH_CHAN_REGULATORY);
2649         case_WLAN(MESH_CHAN);
2650         default: return "<unknown>";
2651         }
2652 }
2653
2654 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2655                                      struct ieee80211_mgmt *mgmt, size_t len)
2656 {
2657         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2658         const u8 *bssid = NULL;
2659         u16 reason_code;
2660
2661         sdata_assert_lock(sdata);
2662
2663         if (len < 24 + 2)
2664                 return;
2665
2666         if (!ifmgd->associated ||
2667             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2668                 return;
2669
2670         bssid = ifmgd->associated->bssid;
2671
2672         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2673
2674         sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2675                    bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2676
2677         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2678
2679         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2680 }
2681
2682
2683 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2684                                        struct ieee80211_mgmt *mgmt, size_t len)
2685 {
2686         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2687         u16 reason_code;
2688
2689         sdata_assert_lock(sdata);
2690
2691         if (len < 24 + 2)
2692                 return;
2693
2694         if (!ifmgd->associated ||
2695             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2696                 return;
2697
2698         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2699
2700         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2701                    mgmt->sa, reason_code);
2702
2703         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2704
2705         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2706 }
2707
2708 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2709                                 u8 *supp_rates, unsigned int supp_rates_len,
2710                                 u32 *rates, u32 *basic_rates,
2711                                 bool *have_higher_than_11mbit,
2712                                 int *min_rate, int *min_rate_index,
2713                                 int shift, u32 rate_flags)
2714 {
2715         int i, j;
2716
2717         for (i = 0; i < supp_rates_len; i++) {
2718                 int rate = supp_rates[i] & 0x7f;
2719                 bool is_basic = !!(supp_rates[i] & 0x80);
2720
2721                 if ((rate * 5 * (1 << shift)) > 110)
2722                         *have_higher_than_11mbit = true;
2723
2724                 /*
2725                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2726                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2727                  *
2728                  * Note: Even through the membership selector and the basic
2729                  *       rate flag share the same bit, they are not exactly
2730                  *       the same.
2731                  */
2732                 if (!!(supp_rates[i] & 0x80) &&
2733                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2734                         continue;
2735
2736                 for (j = 0; j < sband->n_bitrates; j++) {
2737                         struct ieee80211_rate *br;
2738                         int brate;
2739
2740                         br = &sband->bitrates[j];
2741                         if ((rate_flags & br->flags) != rate_flags)
2742                                 continue;
2743
2744                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2745                         if (brate == rate) {
2746                                 *rates |= BIT(j);
2747                                 if (is_basic)
2748                                         *basic_rates |= BIT(j);
2749                                 if ((rate * 5) < *min_rate) {
2750                                         *min_rate = rate * 5;
2751                                         *min_rate_index = j;
2752                                 }
2753                                 break;
2754                         }
2755                 }
2756         }
2757 }
2758
2759 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2760                                          bool assoc)
2761 {
2762         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2763
2764         sdata_assert_lock(sdata);
2765
2766         if (!assoc) {
2767                 /*
2768                  * we are not associated yet, the only timer that could be
2769                  * running is the timeout for the association response which
2770                  * which is not relevant anymore.
2771                  */
2772                 del_timer_sync(&sdata->u.mgd.timer);
2773                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2774
2775                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2776                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2777                 sdata->u.mgd.flags = 0;
2778                 mutex_lock(&sdata->local->mtx);
2779                 ieee80211_vif_release_channel(sdata);
2780                 mutex_unlock(&sdata->local->mtx);
2781         }
2782
2783         kfree(assoc_data);
2784         sdata->u.mgd.assoc_data = NULL;
2785 }
2786
2787 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2788                                     struct cfg80211_bss *cbss,
2789                                     struct ieee80211_mgmt *mgmt, size_t len)
2790 {
2791         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2792         struct ieee80211_local *local = sdata->local;
2793         struct ieee80211_supported_band *sband;
2794         struct sta_info *sta;
2795         u8 *pos;
2796         u16 capab_info, aid;
2797         struct ieee802_11_elems elems;
2798         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2799         const struct cfg80211_bss_ies *bss_ies = NULL;
2800         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2801         u32 changed = 0;
2802         int err;
2803         bool ret;
2804
2805         /* AssocResp and ReassocResp have identical structure */
2806
2807         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2808         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2809
2810         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2811                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2812                            aid);
2813         aid &= ~(BIT(15) | BIT(14));
2814
2815         ifmgd->broken_ap = false;
2816
2817         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2818                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2819                            aid);
2820                 aid = 0;
2821                 ifmgd->broken_ap = true;
2822         }
2823
2824         pos = mgmt->u.assoc_resp.variable;
2825         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2826
2827         if (!elems.supp_rates) {
2828                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2829                 return false;
2830         }
2831
2832         ifmgd->aid = aid;
2833         ifmgd->tdls_chan_switch_prohibited =
2834                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2835                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2836
2837         /*
2838          * Some APs are erroneously not including some information in their
2839          * (re)association response frames. Try to recover by using the data
2840          * from the beacon or probe response. This seems to afflict mobile
2841          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2842          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2843          */
2844         if ((assoc_data->wmm && !elems.wmm_param) ||
2845             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2846              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2847             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2848              (!elems.vht_cap_elem || !elems.vht_operation))) {
2849                 const struct cfg80211_bss_ies *ies;
2850                 struct ieee802_11_elems bss_elems;
2851
2852                 rcu_read_lock();
2853                 ies = rcu_dereference(cbss->ies);
2854                 if (ies)
2855                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2856                                           GFP_ATOMIC);
2857                 rcu_read_unlock();
2858                 if (!bss_ies)
2859                         return false;
2860
2861                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2862                                        false, &bss_elems);
2863                 if (assoc_data->wmm &&
2864                     !elems.wmm_param && bss_elems.wmm_param) {
2865                         elems.wmm_param = bss_elems.wmm_param;
2866                         sdata_info(sdata,
2867                                    "AP bug: WMM param missing from AssocResp\n");
2868                 }
2869
2870                 /*
2871                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2872                  * have to include the IEs in the (re)association response.
2873                  */
2874                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2875                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2876                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2877                         sdata_info(sdata,
2878                                    "AP bug: HT capability missing from AssocResp\n");
2879                 }
2880                 if (!elems.ht_operation && bss_elems.ht_operation &&
2881                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2882                         elems.ht_operation = bss_elems.ht_operation;
2883                         sdata_info(sdata,
2884                                    "AP bug: HT operation missing from AssocResp\n");
2885                 }
2886                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2887                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2888                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2889                         sdata_info(sdata,
2890                                    "AP bug: VHT capa missing from AssocResp\n");
2891                 }
2892                 if (!elems.vht_operation && bss_elems.vht_operation &&
2893                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2894                         elems.vht_operation = bss_elems.vht_operation;
2895                         sdata_info(sdata,
2896                                    "AP bug: VHT operation missing from AssocResp\n");
2897                 }
2898         }
2899
2900         /*
2901          * We previously checked these in the beacon/probe response, so
2902          * they should be present here. This is just a safety net.
2903          */
2904         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2905             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2906                 sdata_info(sdata,
2907                            "HT AP is missing WMM params or HT capability/operation\n");
2908                 ret = false;
2909                 goto out;
2910         }
2911
2912         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2913             (!elems.vht_cap_elem || !elems.vht_operation)) {
2914                 sdata_info(sdata,
2915                            "VHT AP is missing VHT capability/operation\n");
2916                 ret = false;
2917                 goto out;
2918         }
2919
2920         mutex_lock(&sdata->local->sta_mtx);
2921         /*
2922          * station info was already allocated and inserted before
2923          * the association and should be available to us
2924          */
2925         sta = sta_info_get(sdata, cbss->bssid);
2926         if (WARN_ON(!sta)) {
2927                 mutex_unlock(&sdata->local->sta_mtx);
2928                 ret = false;
2929                 goto out;
2930         }
2931
2932         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2933
2934         /* Set up internal HT/VHT capabilities */
2935         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2936                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2937                                                   elems.ht_cap_elem, sta);
2938
2939         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2940                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2941                                                     elems.vht_cap_elem, sta);
2942
2943         /*
2944          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2945          * in their association response, so ignore that data for our own
2946          * configuration. If it changed since the last beacon, we'll get the
2947          * next beacon and update then.
2948          */
2949
2950         /*
2951          * If an operating mode notification IE is present, override the
2952          * NSS calculation (that would be done in rate_control_rate_init())
2953          * and use the # of streams from that element.
2954          */
2955         if (elems.opmode_notif &&
2956             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2957                 u8 nss;
2958
2959                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2960                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2961                 nss += 1;
2962                 sta->sta.rx_nss = nss;
2963         }
2964
2965         rate_control_rate_init(sta);
2966
2967         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
2968                 set_sta_flag(sta, WLAN_STA_MFP);
2969                 sta->sta.mfp = true;
2970         } else {
2971                 sta->sta.mfp = false;
2972         }
2973
2974         sta->sta.wme = elems.wmm_param;
2975
2976         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2977         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2978                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2979         if (err) {
2980                 sdata_info(sdata,
2981                            "failed to move station %pM to desired state\n",
2982                            sta->sta.addr);
2983                 WARN_ON(__sta_info_destroy(sta));
2984                 mutex_unlock(&sdata->local->sta_mtx);
2985                 ret = false;
2986                 goto out;
2987         }
2988
2989         mutex_unlock(&sdata->local->sta_mtx);
2990
2991         /*
2992          * Always handle WMM once after association regardless
2993          * of the first value the AP uses. Setting -1 here has
2994          * that effect because the AP values is an unsigned
2995          * 4-bit value.
2996          */
2997         ifmgd->wmm_last_param_set = -1;
2998
2999         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
3000                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3001                                          elems.wmm_param_len);
3002         else
3003                 ieee80211_set_wmm_default(sdata, false);
3004         changed |= BSS_CHANGED_QOS;
3005
3006         /* set AID and assoc capability,
3007          * ieee80211_set_associated() will tell the driver */
3008         bss_conf->aid = aid;
3009         bss_conf->assoc_capability = capab_info;
3010         ieee80211_set_associated(sdata, cbss, changed);
3011
3012         /*
3013          * If we're using 4-addr mode, let the AP know that we're
3014          * doing so, so that it can create the STA VLAN on its side
3015          */
3016         if (ifmgd->use_4addr)
3017                 ieee80211_send_4addr_nullfunc(local, sdata);
3018
3019         /*
3020          * Start timer to probe the connection to the AP now.
3021          * Also start the timer that will detect beacon loss.
3022          */
3023         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3024         ieee80211_sta_reset_beacon_monitor(sdata);
3025
3026         ret = true;
3027  out:
3028         kfree(bss_ies);
3029         return ret;
3030 }
3031
3032 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3033                                          struct ieee80211_mgmt *mgmt,
3034                                          size_t len)
3035 {
3036         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3037         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3038         u16 capab_info, status_code, aid;
3039         struct ieee802_11_elems elems;
3040         int ac, uapsd_queues = -1;
3041         u8 *pos;
3042         bool reassoc;
3043         struct cfg80211_bss *bss;
3044         struct ieee80211_event event = {
3045                 .type = MLME_EVENT,
3046                 .u.mlme.data = ASSOC_EVENT,
3047         };
3048
3049         sdata_assert_lock(sdata);
3050
3051         if (!assoc_data)
3052                 return;
3053         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3054                 return;
3055
3056         /*
3057          * AssocResp and ReassocResp have identical structure, so process both
3058          * of them in this function.
3059          */
3060
3061         if (len < 24 + 6)
3062                 return;
3063
3064         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3065         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3066         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3067         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3068
3069         sdata_info(sdata,
3070                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3071                    reassoc ? "Rea" : "A", mgmt->sa,
3072                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3073
3074         pos = mgmt->u.assoc_resp.variable;
3075         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3076
3077         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3078             elems.timeout_int &&
3079             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3080                 u32 tu, ms;
3081                 tu = le32_to_cpu(elems.timeout_int->value);
3082                 ms = tu * 1024 / 1000;
3083                 sdata_info(sdata,
3084                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3085                            mgmt->sa, tu, ms);
3086                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3087                 assoc_data->timeout_started = true;
3088                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3089                         run_again(sdata, assoc_data->timeout);
3090                 return;
3091         }
3092
3093         bss = assoc_data->bss;
3094
3095         if (status_code != WLAN_STATUS_SUCCESS) {
3096                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3097                            mgmt->sa, status_code);
3098                 ieee80211_destroy_assoc_data(sdata, false);
3099                 event.u.mlme.status = MLME_DENIED;
3100                 event.u.mlme.reason = status_code;
3101                 drv_event_callback(sdata->local, sdata, &event);
3102         } else {
3103                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3104                         /* oops -- internal error -- send timeout for now */
3105                         ieee80211_destroy_assoc_data(sdata, false);
3106                         cfg80211_assoc_timeout(sdata->dev, bss);
3107                         return;
3108                 }
3109                 event.u.mlme.status = MLME_SUCCESS;
3110                 drv_event_callback(sdata->local, sdata, &event);
3111                 sdata_info(sdata, "associated\n");
3112
3113                 /*
3114                  * destroy assoc_data afterwards, as otherwise an idle
3115                  * recalc after assoc_data is NULL but before associated
3116                  * is set can cause the interface to go idle
3117                  */
3118                 ieee80211_destroy_assoc_data(sdata, true);
3119
3120                 /* get uapsd queues configuration */
3121                 uapsd_queues = 0;
3122                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3123                         if (sdata->tx_conf[ac].uapsd)
3124                                 uapsd_queues |= BIT(ac);
3125         }
3126
3127         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3128 }
3129
3130 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3131                                   struct ieee80211_mgmt *mgmt, size_t len,
3132                                   struct ieee80211_rx_status *rx_status,
3133                                   struct ieee802_11_elems *elems)
3134 {
3135         struct ieee80211_local *local = sdata->local;
3136         struct ieee80211_bss *bss;
3137         struct ieee80211_channel *channel;
3138
3139         sdata_assert_lock(sdata);
3140
3141         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3142         if (!channel)
3143                 return;
3144
3145         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3146                                         channel);
3147         if (bss) {
3148                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3149                 ieee80211_rx_bss_put(local, bss);
3150         }
3151 }
3152
3153
3154 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3155                                          struct sk_buff *skb)
3156 {
3157         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3158         struct ieee80211_if_managed *ifmgd;
3159         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3160         size_t baselen, len = skb->len;
3161         struct ieee802_11_elems elems;
3162
3163         ifmgd = &sdata->u.mgd;
3164
3165         sdata_assert_lock(sdata);
3166
3167         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3168                 return; /* ignore ProbeResp to foreign address */
3169
3170         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3171         if (baselen > len)
3172                 return;
3173
3174         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3175                                false, &elems);
3176
3177         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3178
3179         if (ifmgd->associated &&
3180             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3181                 ieee80211_reset_ap_probe(sdata);
3182
3183         if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
3184             ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
3185                 /* got probe response, continue with auth */
3186                 sdata_info(sdata, "direct probe responded\n");
3187                 ifmgd->auth_data->tries = 0;
3188                 ifmgd->auth_data->timeout = jiffies;
3189                 ifmgd->auth_data->timeout_started = true;
3190                 run_again(sdata, ifmgd->auth_data->timeout);
3191         }
3192 }
3193
3194 /*
3195  * This is the canonical list of information elements we care about,
3196  * the filter code also gives us all changes to the Microsoft OUI
3197  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3198  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3199  * changes to requested client power.
3200  *
3201  * We implement beacon filtering in software since that means we can
3202  * avoid processing the frame here and in cfg80211, and userspace
3203  * will not be able to tell whether the hardware supports it or not.
3204  *
3205  * XXX: This list needs to be dynamic -- userspace needs to be able to
3206  *      add items it requires. It also needs to be able to tell us to
3207  *      look out for other vendor IEs.
3208  */
3209 static const u64 care_about_ies =
3210         (1ULL << WLAN_EID_COUNTRY) |
3211         (1ULL << WLAN_EID_ERP_INFO) |
3212         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3213         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3214         (1ULL << WLAN_EID_HT_CAPABILITY) |
3215         (1ULL << WLAN_EID_HT_OPERATION);
3216
3217 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3218                                      struct ieee80211_mgmt *mgmt, size_t len,
3219                                      struct ieee80211_rx_status *rx_status)
3220 {
3221         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3222         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3223         size_t baselen;
3224         struct ieee802_11_elems elems;
3225         struct ieee80211_local *local = sdata->local;
3226         struct ieee80211_chanctx_conf *chanctx_conf;
3227         struct ieee80211_channel *chan;
3228         struct sta_info *sta;
3229         u32 changed = 0;
3230         bool erp_valid;
3231         u8 erp_value = 0;
3232         u32 ncrc;
3233         u8 *bssid;
3234         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3235
3236         sdata_assert_lock(sdata);
3237
3238         /* Process beacon from the current BSS */
3239         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3240         if (baselen > len)
3241                 return;
3242
3243         rcu_read_lock();
3244         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3245         if (!chanctx_conf) {
3246                 rcu_read_unlock();
3247                 return;
3248         }
3249
3250         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3251                 rcu_read_unlock();
3252                 return;
3253         }
3254         chan = chanctx_conf->def.chan;
3255         rcu_read_unlock();
3256
3257         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3258             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3259                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3260                                        len - baselen, false, &elems);
3261
3262                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3263                 if (elems.tim && !elems.parse_error) {
3264                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3265                         ifmgd->dtim_period = tim_ie->dtim_period;
3266                 }
3267                 ifmgd->have_beacon = true;
3268                 ifmgd->assoc_data->need_beacon = false;
3269                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3270                         sdata->vif.bss_conf.sync_tsf =
3271                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3272                         sdata->vif.bss_conf.sync_device_ts =
3273                                 rx_status->device_timestamp;
3274                         if (elems.tim)
3275                                 sdata->vif.bss_conf.sync_dtim_count =
3276                                         elems.tim->dtim_count;
3277                         else
3278                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3279                 }
3280                 /* continue assoc process */
3281                 ifmgd->assoc_data->timeout = jiffies;
3282                 ifmgd->assoc_data->timeout_started = true;
3283                 run_again(sdata, ifmgd->assoc_data->timeout);
3284                 return;
3285         }
3286
3287         if (!ifmgd->associated ||
3288             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3289                 return;
3290         bssid = ifmgd->associated->bssid;
3291
3292         /* Track average RSSI from the Beacon frames of the current AP */
3293         ifmgd->last_beacon_signal = rx_status->signal;
3294         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3295                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3296                 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3297                 ifmgd->last_cqm_event_signal = 0;
3298                 ifmgd->count_beacon_signal = 1;
3299                 ifmgd->last_ave_beacon_signal = 0;
3300         } else {
3301                 ifmgd->ave_beacon_signal =
3302                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3303                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3304                          ifmgd->ave_beacon_signal) / 16;
3305                 ifmgd->count_beacon_signal++;
3306         }
3307
3308         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3309             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3310                 int sig = ifmgd->ave_beacon_signal;
3311                 int last_sig = ifmgd->last_ave_beacon_signal;
3312                 struct ieee80211_event event = {
3313                         .type = RSSI_EVENT,
3314                 };
3315
3316                 /*
3317                  * if signal crosses either of the boundaries, invoke callback
3318                  * with appropriate parameters
3319                  */
3320                 if (sig > ifmgd->rssi_max_thold &&
3321                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3322                         ifmgd->last_ave_beacon_signal = sig;
3323                         event.u.rssi.data = RSSI_EVENT_HIGH;
3324                         drv_event_callback(local, sdata, &event);
3325                 } else if (sig < ifmgd->rssi_min_thold &&
3326                            (last_sig >= ifmgd->rssi_max_thold ||
3327                            last_sig == 0)) {
3328                         ifmgd->last_ave_beacon_signal = sig;
3329                         event.u.rssi.data = RSSI_EVENT_LOW;
3330                         drv_event_callback(local, sdata, &event);
3331                 }
3332         }
3333
3334         if (bss_conf->cqm_rssi_thold &&
3335             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3336             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3337                 int sig = ifmgd->ave_beacon_signal / 16;
3338                 int last_event = ifmgd->last_cqm_event_signal;
3339                 int thold = bss_conf->cqm_rssi_thold;
3340                 int hyst = bss_conf->cqm_rssi_hyst;
3341                 if (sig < thold &&
3342                     (last_event == 0 || sig < last_event - hyst)) {
3343                         ifmgd->last_cqm_event_signal = sig;
3344                         ieee80211_cqm_rssi_notify(
3345                                 &sdata->vif,
3346                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3347                                 GFP_KERNEL);
3348                 } else if (sig > thold &&
3349                            (last_event == 0 || sig > last_event + hyst)) {
3350                         ifmgd->last_cqm_event_signal = sig;
3351                         ieee80211_cqm_rssi_notify(
3352                                 &sdata->vif,
3353                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3354                                 GFP_KERNEL);
3355                 }
3356         }
3357
3358         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3359                 mlme_dbg_ratelimited(sdata,
3360                                      "cancelling AP probe due to a received beacon\n");
3361                 ieee80211_reset_ap_probe(sdata);
3362         }
3363
3364         /*
3365          * Push the beacon loss detection into the future since
3366          * we are processing a beacon from the AP just now.
3367          */
3368         ieee80211_sta_reset_beacon_monitor(sdata);
3369
3370         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3371         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3372                                           len - baselen, false, &elems,
3373                                           care_about_ies, ncrc);
3374
3375         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3376                 bool directed_tim = ieee80211_check_tim(elems.tim,
3377                                                         elems.tim_len,
3378                                                         ifmgd->aid);
3379                 if (directed_tim) {
3380                         if (local->hw.conf.dynamic_ps_timeout > 0) {
3381                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3382                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3383                                         ieee80211_hw_config(local,
3384                                                             IEEE80211_CONF_CHANGE_PS);
3385                                 }
3386                                 ieee80211_send_nullfunc(local, sdata, 0);
3387                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
3388                                 local->pspolling = true;
3389
3390                                 /*
3391                                  * Here is assumed that the driver will be
3392                                  * able to send ps-poll frame and receive a
3393                                  * response even though power save mode is
3394                                  * enabled, but some drivers might require
3395                                  * to disable power save here. This needs
3396                                  * to be investigated.
3397                                  */
3398                                 ieee80211_send_pspoll(local, sdata);
3399                         }
3400                 }
3401         }
3402
3403         if (sdata->vif.p2p) {
3404                 struct ieee80211_p2p_noa_attr noa = {};
3405                 int ret;
3406
3407                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3408                                             len - baselen,
3409                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3410                                             (u8 *) &noa, sizeof(noa));
3411                 if (ret >= 2) {
3412                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3413                                 /* valid noa_attr and index changed */
3414                                 sdata->u.mgd.p2p_noa_index = noa.index;
3415                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3416                                 changed |= BSS_CHANGED_P2P_PS;
3417                                 /*
3418                                  * make sure we update all information, the CRC
3419                                  * mechanism doesn't look at P2P attributes.
3420                                  */
3421                                 ifmgd->beacon_crc_valid = false;
3422                         }
3423                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3424                         /* noa_attr not found and we had valid noa_attr before */
3425                         sdata->u.mgd.p2p_noa_index = -1;
3426                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3427                         changed |= BSS_CHANGED_P2P_PS;
3428                         ifmgd->beacon_crc_valid = false;
3429                 }
3430         }
3431
3432         if (ifmgd->csa_waiting_bcn)
3433                 ieee80211_chswitch_post_beacon(sdata);
3434
3435         /*
3436          * Update beacon timing and dtim count on every beacon appearance. This
3437          * will allow the driver to use the most updated values. Do it before
3438          * comparing this one with last received beacon.
3439          * IMPORTANT: These parameters would possibly be out of sync by the time
3440          * the driver will use them. The synchronized view is currently
3441          * guaranteed only in certain callbacks.
3442          */
3443         if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3444                 sdata->vif.bss_conf.sync_tsf =
3445                         le64_to_cpu(mgmt->u.beacon.timestamp);
3446                 sdata->vif.bss_conf.sync_device_ts =
3447                         rx_status->device_timestamp;
3448                 if (elems.tim)
3449                         sdata->vif.bss_conf.sync_dtim_count =
3450                                 elems.tim->dtim_count;
3451                 else
3452                         sdata->vif.bss_conf.sync_dtim_count = 0;
3453         }
3454
3455         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3456                 return;
3457         ifmgd->beacon_crc = ncrc;
3458         ifmgd->beacon_crc_valid = true;
3459
3460         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3461
3462         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3463                                          rx_status->device_timestamp,
3464                                          &elems, true);
3465
3466         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3467             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3468                                      elems.wmm_param_len))
3469                 changed |= BSS_CHANGED_QOS;
3470
3471         /*
3472          * If we haven't had a beacon before, tell the driver about the
3473          * DTIM period (and beacon timing if desired) now.
3474          */
3475         if (!ifmgd->have_beacon) {
3476                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3477                 if (elems.tim)
3478                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3479                 else
3480                         bss_conf->dtim_period = 1;
3481
3482                 changed |= BSS_CHANGED_BEACON_INFO;
3483                 ifmgd->have_beacon = true;
3484
3485                 mutex_lock(&local->iflist_mtx);
3486                 ieee80211_recalc_ps(local, -1);
3487                 mutex_unlock(&local->iflist_mtx);
3488
3489                 ieee80211_recalc_ps_vif(sdata);
3490         }
3491
3492         if (elems.erp_info) {
3493                 erp_valid = true;
3494                 erp_value = elems.erp_info[0];
3495         } else {
3496                 erp_valid = false;
3497         }
3498         changed |= ieee80211_handle_bss_capability(sdata,
3499                         le16_to_cpu(mgmt->u.beacon.capab_info),
3500                         erp_valid, erp_value);
3501
3502         mutex_lock(&local->sta_mtx);
3503         sta = sta_info_get(sdata, bssid);
3504
3505         if (ieee80211_config_bw(sdata, sta,
3506                                 elems.ht_cap_elem, elems.ht_operation,
3507                                 elems.vht_operation, bssid, &changed)) {
3508                 mutex_unlock(&local->sta_mtx);
3509                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3510                                        WLAN_REASON_DEAUTH_LEAVING,
3511                                        true, deauth_buf);
3512                 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3513                                       sizeof(deauth_buf));
3514                 return;
3515         }
3516
3517         if (sta && elems.opmode_notif)
3518                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3519                                             rx_status->band, true);
3520         mutex_unlock(&local->sta_mtx);
3521
3522         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3523                                                elems.country_elem,
3524                                                elems.country_elem_len,
3525                                                elems.pwr_constr_elem,
3526                                                elems.cisco_dtpc_elem);
3527
3528         ieee80211_bss_info_change_notify(sdata, changed);
3529 }
3530
3531 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3532                                   struct sk_buff *skb)
3533 {
3534         struct ieee80211_rx_status *rx_status;
3535         struct ieee80211_mgmt *mgmt;
3536         u16 fc;
3537         struct ieee802_11_elems elems;
3538         int ies_len;
3539
3540         rx_status = (struct ieee80211_rx_status *) skb->cb;
3541         mgmt = (struct ieee80211_mgmt *) skb->data;
3542         fc = le16_to_cpu(mgmt->frame_control);
3543
3544         sdata_lock(sdata);
3545
3546         switch (fc & IEEE80211_FCTL_STYPE) {
3547         case IEEE80211_STYPE_BEACON:
3548                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3549                 break;
3550         case IEEE80211_STYPE_PROBE_RESP:
3551                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3552                 break;
3553         case IEEE80211_STYPE_AUTH:
3554                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3555                 break;
3556         case IEEE80211_STYPE_DEAUTH:
3557                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3558                 break;
3559         case IEEE80211_STYPE_DISASSOC:
3560                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3561                 break;
3562         case IEEE80211_STYPE_ASSOC_RESP:
3563         case IEEE80211_STYPE_REASSOC_RESP:
3564                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3565                 break;
3566         case IEEE80211_STYPE_ACTION:
3567                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3568                         ies_len = skb->len -
3569                                   offsetof(struct ieee80211_mgmt,
3570                                            u.action.u.chan_switch.variable);
3571
3572                         if (ies_len < 0)
3573                                 break;
3574
3575                         ieee802_11_parse_elems(
3576                                 mgmt->u.action.u.chan_switch.variable,
3577                                 ies_len, true, &elems);
3578
3579                         if (elems.parse_error)
3580                                 break;
3581
3582                         ieee80211_sta_process_chanswitch(sdata,
3583                                                  rx_status->mactime,
3584                                                  rx_status->device_timestamp,
3585                                                  &elems, false);
3586                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3587                         ies_len = skb->len -
3588                                   offsetof(struct ieee80211_mgmt,
3589                                            u.action.u.ext_chan_switch.variable);
3590
3591                         if (ies_len < 0)
3592                                 break;
3593
3594                         ieee802_11_parse_elems(
3595                                 mgmt->u.action.u.ext_chan_switch.variable,
3596                                 ies_len, true, &elems);
3597
3598                         if (elems.parse_error)
3599                                 break;
3600
3601                         /* for the handling code pretend this was also an IE */
3602                         elems.ext_chansw_ie =
3603                                 &mgmt->u.action.u.ext_chan_switch.data;
3604
3605                         ieee80211_sta_process_chanswitch(sdata,
3606                                                  rx_status->mactime,
3607                                                  rx_status->device_timestamp,
3608                                                  &elems, false);
3609                 }
3610                 break;
3611         }
3612         sdata_unlock(sdata);
3613 }
3614
3615 static void ieee80211_sta_timer(unsigned long data)
3616 {
3617         struct ieee80211_sub_if_data *sdata =
3618                 (struct ieee80211_sub_if_data *) data;
3619
3620         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3621 }
3622
3623 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3624                                           u8 *bssid, u8 reason, bool tx)
3625 {
3626         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3627
3628         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3629                                tx, frame_buf);
3630
3631         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3632                               IEEE80211_DEAUTH_FRAME_LEN);
3633 }
3634
3635 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3636 {
3637         struct ieee80211_local *local = sdata->local;
3638         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3639         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3640         u32 tx_flags = 0;
3641
3642         sdata_assert_lock(sdata);
3643
3644         if (WARN_ON_ONCE(!auth_data))
3645                 return -EINVAL;
3646
3647         auth_data->tries++;
3648
3649         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3650                 sdata_info(sdata, "authentication with %pM timed out\n",
3651                            auth_data->bss->bssid);
3652
3653                 /*
3654                  * Most likely AP is not in the range so remove the
3655                  * bss struct for that AP.
3656                  */
3657                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3658
3659                 return -ETIMEDOUT;
3660         }
3661
3662         drv_mgd_prepare_tx(local, sdata);
3663
3664         if (auth_data->bss->proberesp_ies) {
3665                 u16 trans = 1;
3666                 u16 status = 0;
3667
3668                 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3669                            auth_data->bss->bssid, auth_data->tries,
3670                            IEEE80211_AUTH_MAX_TRIES);
3671
3672                 auth_data->expected_transaction = 2;
3673
3674                 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3675                         trans = auth_data->sae_trans;
3676                         status = auth_data->sae_status;
3677                         auth_data->expected_transaction = trans;
3678                 }
3679
3680                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3681                         tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3682                                    IEEE80211_TX_INTFL_MLME_CONN_TX;
3683
3684                 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3685                                     auth_data->data, auth_data->data_len,
3686                                     auth_data->bss->bssid,
3687                                     auth_data->bss->bssid, NULL, 0, 0,
3688                                     tx_flags);
3689         } else {
3690                 const u8 *ssidie;
3691
3692                 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3693                            auth_data->bss->bssid, auth_data->tries,
3694                            IEEE80211_AUTH_MAX_TRIES);
3695
3696                 rcu_read_lock();
3697                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3698                 if (!ssidie) {
3699                         rcu_read_unlock();
3700                         return -EINVAL;
3701                 }
3702                 /*
3703                  * Direct probe is sent to broadcast address as some APs
3704                  * will not answer to direct packet in unassociated state.
3705                  */
3706                 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3707                                          ssidie + 2, ssidie[1],
3708                                          NULL, 0, (u32) -1, true, 0,
3709                                          auth_data->bss->channel, false);
3710                 rcu_read_unlock();
3711         }
3712
3713         if (tx_flags == 0) {
3714                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3715                 auth_data->timeout_started = true;
3716                 run_again(sdata, auth_data->timeout);
3717         } else {
3718                 auth_data->timeout =
3719                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3720                 auth_data->timeout_started = true;
3721                 run_again(sdata, auth_data->timeout);
3722         }
3723
3724         return 0;
3725 }
3726
3727 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3728 {
3729         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3730         struct ieee80211_local *local = sdata->local;
3731
3732         sdata_assert_lock(sdata);
3733
3734         assoc_data->tries++;
3735         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3736                 sdata_info(sdata, "association with %pM timed out\n",
3737                            assoc_data->bss->bssid);
3738
3739                 /*
3740                  * Most likely AP is not in the range so remove the
3741                  * bss struct for that AP.
3742                  */
3743                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3744
3745                 return -ETIMEDOUT;
3746         }
3747
3748         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3749                    assoc_data->bss->bssid, assoc_data->tries,
3750                    IEEE80211_ASSOC_MAX_TRIES);
3751         ieee80211_send_assoc(sdata);
3752
3753         if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3754                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3755                 assoc_data->timeout_started = true;
3756                 run_again(sdata, assoc_data->timeout);
3757         } else {
3758                 assoc_data->timeout =
3759                         round_jiffies_up(jiffies +
3760                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3761                 assoc_data->timeout_started = true;
3762                 run_again(sdata, assoc_data->timeout);
3763         }
3764
3765         return 0;
3766 }
3767
3768 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3769                                   __le16 fc, bool acked)
3770 {
3771         struct ieee80211_local *local = sdata->local;
3772
3773         sdata->u.mgd.status_fc = fc;
3774         sdata->u.mgd.status_acked = acked;
3775         sdata->u.mgd.status_received = true;
3776
3777         ieee80211_queue_work(&local->hw, &sdata->work);
3778 }
3779
3780 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3781 {
3782         struct ieee80211_local *local = sdata->local;
3783         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3784
3785         sdata_lock(sdata);
3786
3787         if (ifmgd->status_received) {
3788                 __le16 fc = ifmgd->status_fc;
3789                 bool status_acked = ifmgd->status_acked;
3790
3791                 ifmgd->status_received = false;
3792                 if (ifmgd->auth_data &&
3793                     (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3794                         if (status_acked) {
3795                                 ifmgd->auth_data->timeout =
3796                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3797                                 run_again(sdata, ifmgd->auth_data->timeout);
3798                         } else {
3799                                 ifmgd->auth_data->timeout = jiffies - 1;
3800                         }
3801                         ifmgd->auth_data->timeout_started = true;
3802                 } else if (ifmgd->assoc_data &&
3803                            (ieee80211_is_assoc_req(fc) ||
3804                             ieee80211_is_reassoc_req(fc))) {
3805                         if (status_acked) {
3806                                 ifmgd->assoc_data->timeout =
3807                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3808                                 run_again(sdata, ifmgd->assoc_data->timeout);
3809                         } else {
3810                                 ifmgd->assoc_data->timeout = jiffies - 1;
3811                         }
3812                         ifmgd->assoc_data->timeout_started = true;
3813                 }
3814         }
3815
3816         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3817             time_after(jiffies, ifmgd->auth_data->timeout)) {
3818                 if (ifmgd->auth_data->done) {
3819                         /*
3820                          * ok ... we waited for assoc but userspace didn't,
3821                          * so let's just kill the auth data
3822                          */
3823                         ieee80211_destroy_auth_data(sdata, false);
3824                 } else if (ieee80211_probe_auth(sdata)) {
3825                         u8 bssid[ETH_ALEN];
3826                         struct ieee80211_event event = {
3827                                 .type = MLME_EVENT,
3828                                 .u.mlme.data = AUTH_EVENT,
3829                                 .u.mlme.status = MLME_TIMEOUT,
3830                         };
3831
3832                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3833
3834                         ieee80211_destroy_auth_data(sdata, false);
3835
3836                         cfg80211_auth_timeout(sdata->dev, bssid);
3837                         drv_event_callback(sdata->local, sdata, &event);
3838                 }
3839         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3840                 run_again(sdata, ifmgd->auth_data->timeout);
3841
3842         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3843             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3844                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3845                     ieee80211_do_assoc(sdata)) {
3846                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3847                         struct ieee80211_event event = {
3848                                 .type = MLME_EVENT,
3849                                 .u.mlme.data = ASSOC_EVENT,
3850                                 .u.mlme.status = MLME_TIMEOUT,
3851                         };
3852
3853                         ieee80211_destroy_assoc_data(sdata, false);
3854                         cfg80211_assoc_timeout(sdata->dev, bss);
3855                         drv_event_callback(sdata->local, sdata, &event);
3856                 }
3857         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3858                 run_again(sdata, ifmgd->assoc_data->timeout);
3859
3860         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3861             ifmgd->associated) {
3862                 u8 bssid[ETH_ALEN];
3863                 int max_tries;
3864
3865                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3866
3867                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3868                         max_tries = max_nullfunc_tries;
3869                 else
3870                         max_tries = max_probe_tries;
3871
3872                 /* ACK received for nullfunc probing frame */
3873                 if (!ifmgd->probe_send_count)
3874                         ieee80211_reset_ap_probe(sdata);
3875                 else if (ifmgd->nullfunc_failed) {
3876                         if (ifmgd->probe_send_count < max_tries) {
3877                                 mlme_dbg(sdata,
3878                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3879                                          bssid, ifmgd->probe_send_count,
3880                                          max_tries);
3881                                 ieee80211_mgd_probe_ap_send(sdata);
3882                         } else {
3883                                 mlme_dbg(sdata,
3884                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3885                                          bssid);
3886                                 ieee80211_sta_connection_lost(sdata, bssid,
3887                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3888                                         false);
3889                         }
3890                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3891                         run_again(sdata, ifmgd->probe_timeout);
3892                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3893                         mlme_dbg(sdata,
3894                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3895                                  bssid, probe_wait_ms);
3896                         ieee80211_sta_connection_lost(sdata, bssid,
3897                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3898                 } else if (ifmgd->probe_send_count < max_tries) {
3899                         mlme_dbg(sdata,
3900                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3901                                  bssid, probe_wait_ms,
3902                                  ifmgd->probe_send_count, max_tries);
3903                         ieee80211_mgd_probe_ap_send(sdata);
3904                 } else {
3905                         /*
3906                          * We actually lost the connection ... or did we?
3907                          * Let's make sure!
3908                          */
3909                         wiphy_debug(local->hw.wiphy,
3910                                     "%s: No probe response from AP %pM"
3911                                     " after %dms, disconnecting.\n",
3912                                     sdata->name,
3913                                     bssid, probe_wait_ms);
3914
3915                         ieee80211_sta_connection_lost(sdata, bssid,
3916                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3917                 }
3918         }
3919
3920         sdata_unlock(sdata);
3921 }
3922
3923 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3924 {
3925         struct ieee80211_sub_if_data *sdata =
3926                 (struct ieee80211_sub_if_data *) data;
3927         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3928
3929         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3930                 return;
3931
3932         sdata->u.mgd.connection_loss = false;
3933         ieee80211_queue_work(&sdata->local->hw,
3934                              &sdata->u.mgd.beacon_connection_loss_work);
3935 }
3936
3937 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3938 {
3939         struct ieee80211_sub_if_data *sdata =
3940                 (struct ieee80211_sub_if_data *) data;
3941         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3942         struct ieee80211_local *local = sdata->local;
3943
3944         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3945                 return;
3946
3947         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3948 }
3949
3950 static void ieee80211_sta_monitor_work(struct work_struct *work)
3951 {
3952         struct ieee80211_sub_if_data *sdata =
3953                 container_of(work, struct ieee80211_sub_if_data,
3954                              u.mgd.monitor_work);
3955
3956         ieee80211_mgd_probe_ap(sdata, false);
3957 }
3958
3959 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3960 {
3961         u32 flags;
3962
3963         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3964                 __ieee80211_stop_poll(sdata);
3965
3966                 /* let's probe the connection once */
3967                 flags = sdata->local->hw.flags;
3968                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3969                         ieee80211_queue_work(&sdata->local->hw,
3970                                              &sdata->u.mgd.monitor_work);
3971                 /* and do all the other regular work too */
3972                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3973         }
3974 }
3975
3976 #ifdef CONFIG_PM
3977 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3978 {
3979         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3980         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3981
3982         sdata_lock(sdata);
3983
3984         if (ifmgd->auth_data || ifmgd->assoc_data) {
3985                 const u8 *bssid = ifmgd->auth_data ?
3986                                 ifmgd->auth_data->bss->bssid :
3987                                 ifmgd->assoc_data->bss->bssid;
3988
3989                 /*
3990                  * If we are trying to authenticate / associate while suspending,
3991                  * cfg80211 won't know and won't actually abort those attempts,
3992                  * thus we need to do that ourselves.
3993                  */
3994                 ieee80211_send_deauth_disassoc(sdata, bssid,
3995                                                IEEE80211_STYPE_DEAUTH,
3996                                                WLAN_REASON_DEAUTH_LEAVING,
3997                                                false, frame_buf);
3998                 if (ifmgd->assoc_data)
3999                         ieee80211_destroy_assoc_data(sdata, false);
4000                 if (ifmgd->auth_data)
4001                         ieee80211_destroy_auth_data(sdata, false);
4002                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4003                                       IEEE80211_DEAUTH_FRAME_LEN);
4004         }
4005
4006         /* This is a bit of a hack - we should find a better and more generic
4007          * solution to this. Normally when suspending, cfg80211 will in fact
4008          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4009          * auth (not so important) or assoc (this is the problem) process.
4010          *
4011          * As a consequence, it can happen that we are in the process of both
4012          * associating and suspending, and receive an association response
4013          * after cfg80211 has checked if it needs to disconnect, but before
4014          * we actually set the flag to drop incoming frames. This will then
4015          * cause the workqueue flush to process the association response in
4016          * the suspend, resulting in a successful association just before it
4017          * tries to remove the interface from the driver, which now though
4018          * has a channel context assigned ... this results in issues.
4019          *
4020          * To work around this (for now) simply deauth here again if we're
4021          * now connected.
4022          */
4023         if (ifmgd->associated && !sdata->local->wowlan) {
4024                 u8 bssid[ETH_ALEN];
4025                 struct cfg80211_deauth_request req = {
4026                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4027                         .bssid = bssid,
4028                 };
4029
4030                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4031                 ieee80211_mgd_deauth(sdata, &req);
4032         }
4033
4034         sdata_unlock(sdata);
4035 }
4036
4037 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4038 {
4039         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4040
4041         sdata_lock(sdata);
4042         if (!ifmgd->associated) {
4043                 sdata_unlock(sdata);
4044                 return;
4045         }
4046
4047         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4048                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4049                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4050                 ieee80211_sta_connection_lost(sdata,
4051                                               ifmgd->associated->bssid,
4052                                               WLAN_REASON_UNSPECIFIED,
4053                                               true);
4054                 sdata_unlock(sdata);
4055                 return;
4056         }
4057         sdata_unlock(sdata);
4058 }
4059 #endif
4060
4061 /* interface setup */
4062 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4063 {
4064         struct ieee80211_if_managed *ifmgd;
4065
4066         ifmgd = &sdata->u.mgd;
4067         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4068         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4069         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4070                   ieee80211_beacon_connection_loss_work);
4071         INIT_WORK(&ifmgd->csa_connection_drop_work,
4072                   ieee80211_csa_connection_drop_work);
4073         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4074         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4075                           ieee80211_tdls_peer_del_work);
4076         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4077                     (unsigned long) sdata);
4078         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4079                     (unsigned long) sdata);
4080         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4081                     (unsigned long) sdata);
4082         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4083                     (unsigned long) sdata);
4084         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4085                           ieee80211_sta_handle_tspec_ac_params_wk);
4086
4087         ifmgd->flags = 0;
4088         ifmgd->powersave = sdata->wdev.ps;
4089         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4090         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4091         ifmgd->p2p_noa_index = -1;
4092
4093         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4094                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4095         else
4096                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4097
4098         /* Setup TDLS data */
4099         spin_lock_init(&ifmgd->teardown_lock);
4100         ifmgd->teardown_skb = NULL;
4101         ifmgd->orig_teardown_skb = NULL;
4102 }
4103
4104 /* scan finished notification */
4105 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4106 {
4107         struct ieee80211_sub_if_data *sdata;
4108
4109         /* Restart STA timers */
4110         rcu_read_lock();
4111         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4112                 if (ieee80211_sdata_running(sdata))
4113                         ieee80211_restart_sta_timer(sdata);
4114         }
4115         rcu_read_unlock();
4116 }
4117
4118 int ieee80211_max_network_latency(struct notifier_block *nb,
4119                                   unsigned long data, void *dummy)
4120 {
4121         s32 latency_usec = (s32) data;
4122         struct ieee80211_local *local =
4123                 container_of(nb, struct ieee80211_local,
4124                              network_latency_notifier);
4125
4126         mutex_lock(&local->iflist_mtx);
4127         ieee80211_recalc_ps(local, latency_usec);
4128         mutex_unlock(&local->iflist_mtx);
4129
4130         return NOTIFY_OK;
4131 }
4132
4133 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4134                                      struct cfg80211_bss *cbss)
4135 {
4136         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4137         const u8 *ht_cap_ie, *vht_cap_ie;
4138         const struct ieee80211_ht_cap *ht_cap;
4139         const struct ieee80211_vht_cap *vht_cap;
4140         u8 chains = 1;
4141
4142         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4143                 return chains;
4144
4145         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4146         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4147                 ht_cap = (void *)(ht_cap_ie + 2);
4148                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4149                 /*
4150                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4151                  *       "Tx Unequal Modulation Supported" fields.
4152                  */
4153         }
4154
4155         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4156                 return chains;
4157
4158         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4159         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4160                 u8 nss;
4161                 u16 tx_mcs_map;
4162
4163                 vht_cap = (void *)(vht_cap_ie + 2);
4164                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4165                 for (nss = 8; nss > 0; nss--) {
4166                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4167                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4168                                 break;
4169                 }
4170                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4171                 chains = max(chains, nss);
4172         }
4173
4174         return chains;
4175 }
4176
4177 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4178                                   struct cfg80211_bss *cbss)
4179 {
4180         struct ieee80211_local *local = sdata->local;
4181         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4182         const struct ieee80211_ht_cap *ht_cap = NULL;
4183         const struct ieee80211_ht_operation *ht_oper = NULL;
4184         const struct ieee80211_vht_operation *vht_oper = NULL;
4185         struct ieee80211_supported_band *sband;
4186         struct cfg80211_chan_def chandef;
4187         int ret;
4188
4189         sband = local->hw.wiphy->bands[cbss->channel->band];
4190
4191         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4192                           IEEE80211_STA_DISABLE_80P80MHZ |
4193                           IEEE80211_STA_DISABLE_160MHZ);
4194
4195         rcu_read_lock();
4196
4197         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4198             sband->ht_cap.ht_supported) {
4199                 const u8 *ht_oper_ie, *ht_cap_ie;
4200
4201                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4202                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4203                         ht_oper = (void *)(ht_oper_ie + 2);
4204
4205                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4206                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4207                         ht_cap = (void *)(ht_cap_ie + 2);
4208
4209                 if (!ht_cap) {
4210                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4211                         ht_oper = NULL;
4212                 }
4213         }
4214
4215         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4216             sband->vht_cap.vht_supported) {
4217                 const u8 *vht_oper_ie, *vht_cap;
4218
4219                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4220                                                    WLAN_EID_VHT_OPERATION);
4221                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4222                         vht_oper = (void *)(vht_oper_ie + 2);
4223                 if (vht_oper && !ht_oper) {
4224                         vht_oper = NULL;
4225                         sdata_info(sdata,
4226                                    "AP advertised VHT without HT, disabling both\n");
4227                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4228                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4229                 }
4230
4231                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4232                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4233                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4234                         vht_oper = NULL;
4235                 }
4236         }
4237
4238         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4239                                                      cbss->channel,
4240                                                      ht_cap, ht_oper, vht_oper,
4241                                                      &chandef, false);
4242
4243         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4244                                       local->rx_chains);
4245
4246         rcu_read_unlock();
4247
4248         /* will change later if needed */
4249         sdata->smps_mode = IEEE80211_SMPS_OFF;
4250
4251         mutex_lock(&local->mtx);
4252         /*
4253          * If this fails (possibly due to channel context sharing
4254          * on incompatible channels, e.g. 80+80 and 160 sharing the
4255          * same control channel) try to use a smaller bandwidth.
4256          */
4257         ret = ieee80211_vif_use_channel(sdata, &chandef,
4258                                         IEEE80211_CHANCTX_SHARED);
4259
4260         /* don't downgrade for 5 and 10 MHz channels, though. */
4261         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4262             chandef.width == NL80211_CHAN_WIDTH_10)
4263                 goto out;
4264
4265         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4266                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4267                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4268                                                 IEEE80211_CHANCTX_SHARED);
4269         }
4270  out:
4271         mutex_unlock(&local->mtx);
4272         return ret;
4273 }
4274
4275 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4276                                      struct cfg80211_bss *cbss, bool assoc)
4277 {
4278         struct ieee80211_local *local = sdata->local;
4279         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4280         struct ieee80211_bss *bss = (void *)cbss->priv;
4281         struct sta_info *new_sta = NULL;
4282         struct ieee80211_supported_band *sband;
4283         struct ieee80211_sta_ht_cap sta_ht_cap;
4284         bool have_sta = false, is_override = false;
4285         int err;
4286
4287         sband = local->hw.wiphy->bands[cbss->channel->band];
4288
4289         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4290                 return -EINVAL;
4291
4292         if (assoc) {
4293                 rcu_read_lock();
4294                 have_sta = sta_info_get(sdata, cbss->bssid);
4295                 rcu_read_unlock();
4296         }
4297
4298         if (!have_sta) {
4299                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4300                 if (!new_sta)
4301                         return -ENOMEM;
4302         }
4303
4304         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4305         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4306
4307         is_override = (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) !=
4308                       (sband->ht_cap.cap &
4309                        IEEE80211_HT_CAP_SUP_WIDTH_20_40);
4310
4311         if (new_sta || is_override) {
4312                 err = ieee80211_prep_channel(sdata, cbss);
4313                 if (err) {
4314                         if (new_sta)
4315                                 sta_info_free(local, new_sta);
4316                         return -EINVAL;
4317                 }
4318         }
4319
4320         if (new_sta) {
4321                 u32 rates = 0, basic_rates = 0;
4322                 bool have_higher_than_11mbit;
4323                 int min_rate = INT_MAX, min_rate_index = -1;
4324                 struct ieee80211_chanctx_conf *chanctx_conf;
4325                 const struct cfg80211_bss_ies *ies;
4326                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4327                 u32 rate_flags;
4328
4329                 rcu_read_lock();
4330                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4331                 if (WARN_ON(!chanctx_conf)) {
4332                         rcu_read_unlock();
4333                         sta_info_free(local, new_sta);
4334                         return -EINVAL;
4335                 }
4336                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4337                 rcu_read_unlock();
4338
4339                 ieee80211_get_rates(sband, bss->supp_rates,
4340                                     bss->supp_rates_len,
4341                                     &rates, &basic_rates,
4342                                     &have_higher_than_11mbit,
4343                                     &min_rate, &min_rate_index,
4344                                     shift, rate_flags);
4345
4346                 /*
4347                  * This used to be a workaround for basic rates missing
4348                  * in the association response frame. Now that we no
4349                  * longer use the basic rates from there, it probably
4350                  * doesn't happen any more, but keep the workaround so
4351                  * in case some *other* APs are buggy in different ways
4352                  * we can connect -- with a warning.
4353                  */
4354                 if (!basic_rates && min_rate_index >= 0) {
4355                         sdata_info(sdata,
4356                                    "No basic rates, using min rate instead\n");
4357                         basic_rates = BIT(min_rate_index);
4358                 }
4359
4360                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4361                 sdata->vif.bss_conf.basic_rates = basic_rates;
4362
4363                 /* cf. IEEE 802.11 9.2.12 */
4364                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4365                     have_higher_than_11mbit)
4366                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4367                 else
4368                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4369
4370                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4371
4372                 /* set timing information */
4373                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4374                 rcu_read_lock();
4375                 ies = rcu_dereference(cbss->beacon_ies);
4376                 if (ies) {
4377                         const u8 *tim_ie;
4378
4379                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4380                         sdata->vif.bss_conf.sync_device_ts =
4381                                 bss->device_ts_beacon;
4382                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4383                                                   ies->data, ies->len);
4384                         if (tim_ie && tim_ie[1] >= 2)
4385                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4386                         else
4387                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4388                 } else if (!(local->hw.flags &
4389                                         IEEE80211_HW_TIMING_BEACON_ONLY)) {
4390                         ies = rcu_dereference(cbss->proberesp_ies);
4391                         /* must be non-NULL since beacon IEs were NULL */
4392                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4393                         sdata->vif.bss_conf.sync_device_ts =
4394                                 bss->device_ts_presp;
4395                         sdata->vif.bss_conf.sync_dtim_count = 0;
4396                 } else {
4397                         sdata->vif.bss_conf.sync_tsf = 0;
4398                         sdata->vif.bss_conf.sync_device_ts = 0;
4399                         sdata->vif.bss_conf.sync_dtim_count = 0;
4400                 }
4401                 rcu_read_unlock();
4402
4403                 /* tell driver about BSSID, basic rates and timing */
4404                 ieee80211_bss_info_change_notify(sdata,
4405                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4406                         BSS_CHANGED_BEACON_INT);
4407
4408                 if (assoc)
4409                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4410
4411                 err = sta_info_insert(new_sta);
4412                 new_sta = NULL;
4413                 if (err) {
4414                         sdata_info(sdata,
4415                                    "failed to insert STA entry for the AP (error %d)\n",
4416                                    err);
4417                         return err;
4418                 }
4419         } else
4420                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4421
4422         return 0;
4423 }
4424
4425 /* config hooks */
4426 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4427                        struct cfg80211_auth_request *req)
4428 {
4429         struct ieee80211_local *local = sdata->local;
4430         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4431         struct ieee80211_mgd_auth_data *auth_data;
4432         u16 auth_alg;
4433         int err;
4434
4435         /* prepare auth data structure */
4436
4437         switch (req->auth_type) {
4438         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4439                 auth_alg = WLAN_AUTH_OPEN;
4440                 break;
4441         case NL80211_AUTHTYPE_SHARED_KEY:
4442                 if (IS_ERR(local->wep_tx_tfm))
4443                         return -EOPNOTSUPP;
4444                 auth_alg = WLAN_AUTH_SHARED_KEY;
4445                 break;
4446         case NL80211_AUTHTYPE_FT:
4447                 auth_alg = WLAN_AUTH_FT;
4448                 break;
4449         case NL80211_AUTHTYPE_NETWORK_EAP:
4450                 auth_alg = WLAN_AUTH_LEAP;
4451                 break;
4452         case NL80211_AUTHTYPE_SAE:
4453                 auth_alg = WLAN_AUTH_SAE;
4454                 break;
4455         default:
4456                 return -EOPNOTSUPP;
4457         }
4458
4459         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4460                             req->ie_len, GFP_KERNEL);
4461         if (!auth_data)
4462                 return -ENOMEM;
4463
4464         auth_data->bss = req->bss;
4465
4466         if (req->sae_data_len >= 4) {
4467                 __le16 *pos = (__le16 *) req->sae_data;
4468                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4469                 auth_data->sae_status = le16_to_cpu(pos[1]);
4470                 memcpy(auth_data->data, req->sae_data + 4,
4471                        req->sae_data_len - 4);
4472                 auth_data->data_len += req->sae_data_len - 4;
4473         }
4474
4475         if (req->ie && req->ie_len) {
4476                 memcpy(&auth_data->data[auth_data->data_len],
4477                        req->ie, req->ie_len);
4478                 auth_data->data_len += req->ie_len;
4479         }
4480
4481         if (req->key && req->key_len) {
4482                 auth_data->key_len = req->key_len;
4483                 auth_data->key_idx = req->key_idx;
4484                 memcpy(auth_data->key, req->key, req->key_len);
4485         }
4486
4487         auth_data->algorithm = auth_alg;
4488
4489         /* try to authenticate/probe */
4490
4491         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4492             ifmgd->assoc_data) {
4493                 err = -EBUSY;
4494                 goto err_free;
4495         }
4496
4497         if (ifmgd->auth_data)
4498                 ieee80211_destroy_auth_data(sdata, false);
4499
4500         /* prep auth_data so we don't go into idle on disassoc */
4501         ifmgd->auth_data = auth_data;
4502
4503         if (ifmgd->associated) {
4504                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4505
4506                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4507                                        WLAN_REASON_UNSPECIFIED,
4508                                        false, frame_buf);
4509
4510                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4511                                       sizeof(frame_buf));
4512         }
4513
4514         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4515
4516         err = ieee80211_prep_connection(sdata, req->bss, false);
4517         if (err)
4518                 goto err_clear;
4519
4520         err = ieee80211_probe_auth(sdata);
4521         if (err) {
4522                 sta_info_destroy_addr(sdata, req->bss->bssid);
4523                 goto err_clear;
4524         }
4525
4526         /* hold our own reference */
4527         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4528         return 0;
4529
4530  err_clear:
4531         memset(ifmgd->bssid, 0, ETH_ALEN);
4532         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4533         ifmgd->auth_data = NULL;
4534  err_free:
4535         kfree(auth_data);
4536         return err;
4537 }
4538
4539 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4540                                         const u8 *wmm_param, int len)
4541 {
4542         const u8 *pos;
4543         size_t left;
4544
4545         if (len < 8)
4546                 return false;
4547
4548         if (wmm_param[5] != 1 /* version */)
4549                 return false;
4550
4551         pos = wmm_param + 8;
4552         left = len - 8;
4553
4554         for (; left >= 4; left -= 4, pos += 4) {
4555                 u8 aifsn = pos[0] & 0x0f;
4556                 u8 ecwmin = pos[1] & 0x0f;
4557                 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4558                 int aci = (pos[0] >> 5) & 0x03;
4559
4560                 if (aifsn < 2) {
4561                         sdata_info(sdata,
4562                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4563                                    aifsn, aci);
4564                         return false;
4565                 }
4566                 if (ecwmin > ecwmax) {
4567                         sdata_info(sdata,
4568                                    "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4569                                    ecwmin, ecwmax, aci);
4570                         return false;
4571                 }
4572         }
4573
4574         return true;
4575 }
4576
4577 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4578                         struct cfg80211_assoc_request *req)
4579 {
4580         struct ieee80211_local *local = sdata->local;
4581         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4582         struct ieee80211_bss *bss = (void *)req->bss->priv;
4583         struct ieee80211_mgd_assoc_data *assoc_data;
4584         const struct cfg80211_bss_ies *beacon_ies;
4585         struct ieee80211_supported_band *sband;
4586         const u8 *ssidie, *ht_ie, *vht_ie;
4587         int i, err;
4588
4589         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4590         if (!assoc_data)
4591                 return -ENOMEM;
4592
4593         rcu_read_lock();
4594         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4595         if (!ssidie) {
4596                 rcu_read_unlock();
4597                 kfree(assoc_data);
4598                 return -EINVAL;
4599         }
4600         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4601         assoc_data->ssid_len = ssidie[1];
4602         rcu_read_unlock();
4603
4604         if (ifmgd->associated) {
4605                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4606
4607                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4608                                        WLAN_REASON_UNSPECIFIED,
4609                                        false, frame_buf);
4610
4611                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4612                                       sizeof(frame_buf));
4613         }
4614
4615         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4616                 err = -EBUSY;
4617                 goto err_free;
4618         }
4619
4620         if (ifmgd->assoc_data) {
4621                 err = -EBUSY;
4622                 goto err_free;
4623         }
4624
4625         if (ifmgd->auth_data) {
4626                 bool match;
4627
4628                 /* keep sta info, bssid if matching */
4629                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4630                 ieee80211_destroy_auth_data(sdata, match);
4631         }
4632
4633         /* prepare assoc data */
4634
4635         ifmgd->beacon_crc_valid = false;
4636
4637         assoc_data->wmm = bss->wmm_used &&
4638                           (local->hw.queues >= IEEE80211_NUM_ACS);
4639         if (assoc_data->wmm) {
4640                 /* try to check validity of WMM params IE */
4641                 const struct cfg80211_bss_ies *ies;
4642                 const u8 *wp, *start, *end;
4643
4644                 rcu_read_lock();
4645                 ies = rcu_dereference(req->bss->ies);
4646                 start = ies->data;
4647                 end = start + ies->len;
4648
4649                 while (true) {
4650                         wp = cfg80211_find_vendor_ie(
4651                                 WLAN_OUI_MICROSOFT,
4652                                 WLAN_OUI_TYPE_MICROSOFT_WMM,
4653                                 start, end - start);
4654                         if (!wp)
4655                                 break;
4656                         start = wp + wp[1] + 2;
4657                         /* if this IE is too short, try the next */
4658                         if (wp[1] <= 4)
4659                                 continue;
4660                         /* if this IE is WMM params, we found what we wanted */
4661                         if (wp[6] == 1)
4662                                 break;
4663                 }
4664
4665                 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4666                                                         wp[1] - 2)) {
4667                         assoc_data->wmm = false;
4668                         ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4669                 }
4670                 rcu_read_unlock();
4671         }
4672
4673         /*
4674          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4675          * We still associate in non-HT mode (11a/b/g) if any one of these
4676          * ciphers is configured as pairwise.
4677          * We can set this to true for non-11n hardware, that'll be checked
4678          * separately along with the peer capabilities.
4679          */
4680         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4681                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4682                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4683                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4684                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4685                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4686                         netdev_info(sdata->dev,
4687                                     "disabling HT/VHT due to WEP/TKIP use\n");
4688                 }
4689         }
4690
4691         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4692                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4693                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4694         }
4695
4696         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4697                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4698
4699         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4700         sband = local->hw.wiphy->bands[req->bss->channel->band];
4701         if (!sband->ht_cap.ht_supported ||
4702             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4703             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4704                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4705                 if (!bss->wmm_used &&
4706                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4707                         netdev_info(sdata->dev,
4708                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4709         }
4710
4711         /* disable VHT if we don't support it or the AP doesn't use WMM */
4712         if (!sband->vht_cap.vht_supported ||
4713             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4714             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4715                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4716                 if (!bss->wmm_used &&
4717                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4718                         netdev_info(sdata->dev,
4719                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4720         }
4721
4722         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4723         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4724                sizeof(ifmgd->ht_capa_mask));
4725
4726         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4727         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4728                sizeof(ifmgd->vht_capa_mask));
4729
4730         if (req->ie && req->ie_len) {
4731                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4732                 assoc_data->ie_len = req->ie_len;
4733         }
4734
4735         assoc_data->bss = req->bss;
4736
4737         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4738                 if (ifmgd->powersave)
4739                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4740                 else
4741                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4742         } else
4743                 sdata->smps_mode = ifmgd->req_smps;
4744
4745         assoc_data->capability = req->bss->capability;
4746         assoc_data->supp_rates = bss->supp_rates;
4747         assoc_data->supp_rates_len = bss->supp_rates_len;
4748
4749         rcu_read_lock();
4750         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4751         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4752                 assoc_data->ap_ht_param =
4753                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4754         else
4755                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4756         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4757         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4758                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4759                        sizeof(struct ieee80211_vht_cap));
4760         else
4761                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4762         rcu_read_unlock();
4763
4764         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4765                  (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4766              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4767                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4768
4769         if (bss->wmm_used && bss->uapsd_supported &&
4770             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4771                 assoc_data->uapsd = true;
4772                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4773         } else {
4774                 assoc_data->uapsd = false;
4775                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4776         }
4777
4778         if (req->prev_bssid)
4779                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4780
4781         if (req->use_mfp) {
4782                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4783                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4784         } else {
4785                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4786                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4787         }
4788
4789         if (req->flags & ASSOC_REQ_USE_RRM)
4790                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4791         else
4792                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4793
4794         if (req->crypto.control_port)
4795                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4796         else
4797                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4798
4799         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4800         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4801         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4802                                                         sdata->vif.type);
4803
4804         /* kick off associate process */
4805
4806         ifmgd->assoc_data = assoc_data;
4807         ifmgd->dtim_period = 0;
4808         ifmgd->have_beacon = false;
4809
4810         err = ieee80211_prep_connection(sdata, req->bss, true);
4811         if (err)
4812                 goto err_clear;
4813
4814         rcu_read_lock();
4815         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4816
4817         if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4818             !beacon_ies) {
4819                 /*
4820                  * Wait up to one beacon interval ...
4821                  * should this be more if we miss one?
4822                  */
4823                 sdata_info(sdata, "waiting for beacon from %pM\n",
4824                            ifmgd->bssid);
4825                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4826                 assoc_data->timeout_started = true;
4827                 assoc_data->need_beacon = true;
4828         } else if (beacon_ies) {
4829                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4830                                                     beacon_ies->data,
4831                                                     beacon_ies->len);
4832                 u8 dtim_count = 0;
4833
4834                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4835                         const struct ieee80211_tim_ie *tim;
4836                         tim = (void *)(tim_ie + 2);
4837                         ifmgd->dtim_period = tim->dtim_period;
4838                         dtim_count = tim->dtim_count;
4839                 }
4840                 ifmgd->have_beacon = true;
4841                 assoc_data->timeout = jiffies;
4842                 assoc_data->timeout_started = true;
4843
4844                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4845                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4846                         sdata->vif.bss_conf.sync_device_ts =
4847                                 bss->device_ts_beacon;
4848                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4849                 }
4850         } else {
4851                 assoc_data->timeout = jiffies;
4852                 assoc_data->timeout_started = true;
4853         }
4854         rcu_read_unlock();
4855
4856         run_again(sdata, assoc_data->timeout);
4857
4858         if (bss->corrupt_data) {
4859                 char *corrupt_type = "data";
4860                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4861                         if (bss->corrupt_data &
4862                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4863                                 corrupt_type = "beacon and probe response";
4864                         else
4865                                 corrupt_type = "beacon";
4866                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4867                         corrupt_type = "probe response";
4868                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4869                            corrupt_type);
4870         }
4871
4872         return 0;
4873  err_clear:
4874         memset(ifmgd->bssid, 0, ETH_ALEN);
4875         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4876         ifmgd->assoc_data = NULL;
4877  err_free:
4878         kfree(assoc_data);
4879         return err;
4880 }
4881
4882 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4883                          struct cfg80211_deauth_request *req)
4884 {
4885         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4886         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4887         bool tx = !req->local_state_change;
4888
4889         if (ifmgd->auth_data &&
4890             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4891                 sdata_info(sdata,
4892                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4893                            req->bssid, req->reason_code,
4894                            ieee80211_get_reason_code_string(req->reason_code));
4895
4896                 drv_mgd_prepare_tx(sdata->local, sdata);
4897                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4898                                                IEEE80211_STYPE_DEAUTH,
4899                                                req->reason_code, tx,
4900                                                frame_buf);
4901                 ieee80211_destroy_auth_data(sdata, false);
4902                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4903                                       IEEE80211_DEAUTH_FRAME_LEN);
4904
4905                 return 0;
4906         }
4907
4908         if (ifmgd->associated &&
4909             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4910                 sdata_info(sdata,
4911                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4912                            req->bssid, req->reason_code,
4913                            ieee80211_get_reason_code_string(req->reason_code));
4914
4915                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4916                                        req->reason_code, tx, frame_buf);
4917                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4918                                       IEEE80211_DEAUTH_FRAME_LEN);
4919                 return 0;
4920         }
4921
4922         return -ENOTCONN;
4923 }
4924
4925 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4926                            struct cfg80211_disassoc_request *req)
4927 {
4928         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4929         u8 bssid[ETH_ALEN];
4930         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4931
4932         /*
4933          * cfg80211 should catch this ... but it's racy since
4934          * we can receive a disassoc frame, process it, hand it
4935          * to cfg80211 while that's in a locked section already
4936          * trying to tell us that the user wants to disconnect.
4937          */
4938         if (ifmgd->associated != req->bss)
4939                 return -ENOLINK;
4940
4941         sdata_info(sdata,
4942                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
4943                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4944
4945         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4946         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4947                                req->reason_code, !req->local_state_change,
4948                                frame_buf);
4949
4950         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4951                               IEEE80211_DEAUTH_FRAME_LEN);
4952
4953         return 0;
4954 }
4955
4956 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4957 {
4958         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4959
4960         /*
4961          * Make sure some work items will not run after this,
4962          * they will not do anything but might not have been
4963          * cancelled when disconnecting.
4964          */
4965         cancel_work_sync(&ifmgd->monitor_work);
4966         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4967         cancel_work_sync(&ifmgd->request_smps_work);
4968         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4969         cancel_work_sync(&ifmgd->chswitch_work);
4970         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4971
4972         sdata_lock(sdata);
4973         if (ifmgd->assoc_data) {
4974                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4975                 ieee80211_destroy_assoc_data(sdata, false);
4976                 cfg80211_assoc_timeout(sdata->dev, bss);
4977         }
4978         if (ifmgd->auth_data)
4979                 ieee80211_destroy_auth_data(sdata, false);
4980         spin_lock_bh(&ifmgd->teardown_lock);
4981         if (ifmgd->teardown_skb) {
4982                 kfree_skb(ifmgd->teardown_skb);
4983                 ifmgd->teardown_skb = NULL;
4984                 ifmgd->orig_teardown_skb = NULL;
4985         }
4986         spin_unlock_bh(&ifmgd->teardown_lock);
4987         del_timer_sync(&ifmgd->timer);
4988         sdata_unlock(sdata);
4989 }
4990
4991 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4992                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4993                                gfp_t gfp)
4994 {
4995         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4996
4997         trace_api_cqm_rssi_notify(sdata, rssi_event);
4998
4999         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5000 }
5001 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5002
5003 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5004 {
5005         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5006
5007         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5008
5009         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5010 }
5011 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);