net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <[email protected]>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <[email protected]>
   7  * Copyright 2007, Michael Wu <[email protected]>
   8  * Copyright 2013-2014  Intel Mobile Communications GmbH
   9  *
  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         if (cfg80211_chandef_identical(&csa_ie.chandef,
1154                                        &sdata->vif.bss_conf.chandef)) {
1155                 if (ifmgd->csa_ignored_same_chan)
1156                         return;
1157                 sdata_info(sdata,
1158                            "AP %pM tries to chanswitch to same channel, ignore\n",
1159                            ifmgd->associated->bssid);
1160                 ifmgd->csa_ignored_same_chan = true;
1161                 return;
1162         }
1163
1164         mutex_lock(&local->mtx);
1165         mutex_lock(&local->chanctx_mtx);
1166         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1167                                          lockdep_is_held(&local->chanctx_mtx));
1168         if (!conf) {
1169                 sdata_info(sdata,
1170                            "no channel context assigned to vif?, disconnecting\n");
1171                 ieee80211_queue_work(&local->hw,
1172                                      &ifmgd->csa_connection_drop_work);
1173                 mutex_unlock(&local->chanctx_mtx);
1174                 mutex_unlock(&local->mtx);
1175                 return;
1176         }
1177
1178         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1179
1180         if (local->use_chanctx &&
1181             !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1182                 sdata_info(sdata,
1183                            "driver doesn't support chan-switch with channel contexts\n");
1184                 ieee80211_queue_work(&local->hw,
1185                                      &ifmgd->csa_connection_drop_work);
1186                 mutex_unlock(&local->chanctx_mtx);
1187                 mutex_unlock(&local->mtx);
1188                 return;
1189         }
1190
1191         ch_switch.timestamp = timestamp;
1192         ch_switch.device_timestamp = device_timestamp;
1193         ch_switch.block_tx = csa_ie.mode;
1194         ch_switch.chandef = csa_ie.chandef;
1195         ch_switch.count = csa_ie.count;
1196
1197         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1198                 sdata_info(sdata,
1199                            "preparing for channel switch failed, disconnecting\n");
1200                 ieee80211_queue_work(&local->hw,
1201                                      &ifmgd->csa_connection_drop_work);
1202                 mutex_unlock(&local->chanctx_mtx);
1203                 mutex_unlock(&local->mtx);
1204                 return;
1205         }
1206
1207         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1208                                             chanctx->mode, false);
1209         if (res) {
1210                 sdata_info(sdata,
1211                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1212                            res);
1213                 ieee80211_queue_work(&local->hw,
1214                                      &ifmgd->csa_connection_drop_work);
1215                 mutex_unlock(&local->chanctx_mtx);
1216                 mutex_unlock(&local->mtx);
1217                 return;
1218         }
1219         mutex_unlock(&local->chanctx_mtx);
1220
1221         sdata->vif.csa_active = true;
1222         sdata->csa_chandef = csa_ie.chandef;
1223         sdata->csa_block_tx = csa_ie.mode;
1224         ifmgd->csa_ignored_same_chan = false;
1225
1226         if (sdata->csa_block_tx)
1227                 ieee80211_stop_vif_queues(local, sdata,
1228                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1229         mutex_unlock(&local->mtx);
1230
1231         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1232                                           csa_ie.count);
1233
1234         if (local->ops->channel_switch) {
1235                 /* use driver's channel switch callback */
1236                 drv_channel_switch(local, sdata, &ch_switch);
1237                 return;
1238         }
1239
1240         /* channel switch handled in software */
1241         if (csa_ie.count <= 1)
1242                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1243         else
1244                 mod_timer(&ifmgd->chswitch_timer,
1245                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1246                                          cbss->beacon_interval));
1247 }
1248
1249 static bool
1250 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1251                                  struct ieee80211_channel *channel,
1252                                  const u8 *country_ie, u8 country_ie_len,
1253                                  const u8 *pwr_constr_elem,
1254                                  int *chan_pwr, int *pwr_reduction)
1255 {
1256         struct ieee80211_country_ie_triplet *triplet;
1257         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1258         int i, chan_increment;
1259         bool have_chan_pwr = false;
1260
1261         /* Invalid IE */
1262         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1263                 return false;
1264
1265         triplet = (void *)(country_ie + 3);
1266         country_ie_len -= 3;
1267
1268         switch (channel->band) {
1269         default:
1270                 WARN_ON_ONCE(1);
1271                 /* fall through */
1272         case IEEE80211_BAND_2GHZ:
1273         case IEEE80211_BAND_60GHZ:
1274                 chan_increment = 1;
1275                 break;
1276         case IEEE80211_BAND_5GHZ:
1277                 chan_increment = 4;
1278                 break;
1279         }
1280
1281         /* find channel */
1282         while (country_ie_len >= 3) {
1283                 u8 first_channel = triplet->chans.first_channel;
1284
1285                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1286                         goto next;
1287
1288                 for (i = 0; i < triplet->chans.num_channels; i++) {
1289                         if (first_channel + i * chan_increment == chan) {
1290                                 have_chan_pwr = true;
1291                                 *chan_pwr = triplet->chans.max_power;
1292                                 break;
1293                         }
1294                 }
1295                 if (have_chan_pwr)
1296                         break;
1297
1298  next:
1299                 triplet++;
1300                 country_ie_len -= 3;
1301         }
1302
1303         if (have_chan_pwr && pwr_constr_elem)
1304                 *pwr_reduction = *pwr_constr_elem;
1305         else
1306                 *pwr_reduction = 0;
1307
1308         return have_chan_pwr;
1309 }
1310
1311 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1312                                       struct ieee80211_channel *channel,
1313                                       const u8 *cisco_dtpc_ie,
1314                                       int *pwr_level)
1315 {
1316         /* From practical testing, the first data byte of the DTPC element
1317          * seems to contain the requested dBm level, and the CLI on Cisco
1318          * APs clearly state the range is -127 to 127 dBm, which indicates
1319          * a signed byte, although it seemingly never actually goes negative.
1320          * The other byte seems to always be zero.
1321          */
1322         *pwr_level = (__s8)cisco_dtpc_ie[4];
1323 }
1324
1325 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1326                                        struct ieee80211_channel *channel,
1327                                        struct ieee80211_mgmt *mgmt,
1328                                        const u8 *country_ie, u8 country_ie_len,
1329                                        const u8 *pwr_constr_ie,
1330                                        const u8 *cisco_dtpc_ie)
1331 {
1332         bool has_80211h_pwr = false, has_cisco_pwr = false;
1333         int chan_pwr = 0, pwr_reduction_80211h = 0;
1334         int pwr_level_cisco, pwr_level_80211h;
1335         int new_ap_level;
1336         __le16 capab = mgmt->u.probe_resp.capab_info;
1337
1338         if (country_ie &&
1339             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1340              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1341                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1342                         sdata, channel, country_ie, country_ie_len,
1343                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1344                 pwr_level_80211h =
1345                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1346         }
1347
1348         if (cisco_dtpc_ie) {
1349                 ieee80211_find_cisco_dtpc(
1350                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1351                 has_cisco_pwr = true;
1352         }
1353
1354         if (!has_80211h_pwr && !has_cisco_pwr)
1355                 return 0;
1356
1357         /* If we have both 802.11h and Cisco DTPC, apply both limits
1358          * by picking the smallest of the two power levels advertised.
1359          */
1360         if (has_80211h_pwr &&
1361             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1362                 sdata_info(sdata,
1363                            "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1364                            pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1365                            sdata->u.mgd.bssid);
1366                 new_ap_level = pwr_level_80211h;
1367         } else {  /* has_cisco_pwr is always true here. */
1368                 sdata_info(sdata,
1369                            "Limiting TX power to %d dBm as advertised by %pM\n",
1370                            pwr_level_cisco, sdata->u.mgd.bssid);
1371                 new_ap_level = pwr_level_cisco;
1372         }
1373
1374         if (sdata->ap_power_level == new_ap_level)
1375                 return 0;
1376
1377         sdata->ap_power_level = new_ap_level;
1378         if (__ieee80211_recalc_txpower(sdata))
1379                 return BSS_CHANGED_TXPOWER;
1380         return 0;
1381 }
1382
1383 /* powersave */
1384 static void ieee80211_enable_ps(struct ieee80211_local *local,
1385                                 struct ieee80211_sub_if_data *sdata)
1386 {
1387         struct ieee80211_conf *conf = &local->hw.conf;
1388
1389         /*
1390          * If we are scanning right now then the parameters will
1391          * take effect when scan finishes.
1392          */
1393         if (local->scanning)
1394                 return;
1395
1396         if (conf->dynamic_ps_timeout > 0 &&
1397             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1398                 mod_timer(&local->dynamic_ps_timer, jiffies +
1399                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1400         } else {
1401                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1402                         ieee80211_send_nullfunc(local, sdata, 1);
1403
1404                 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1405                     (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1406                         return;
1407
1408                 conf->flags |= IEEE80211_CONF_PS;
1409                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1410         }
1411 }
1412
1413 static void ieee80211_change_ps(struct ieee80211_local *local)
1414 {
1415         struct ieee80211_conf *conf = &local->hw.conf;
1416
1417         if (local->ps_sdata) {
1418                 ieee80211_enable_ps(local, local->ps_sdata);
1419         } else if (conf->flags & IEEE80211_CONF_PS) {
1420                 conf->flags &= ~IEEE80211_CONF_PS;
1421                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1422                 del_timer_sync(&local->dynamic_ps_timer);
1423                 cancel_work_sync(&local->dynamic_ps_enable_work);
1424         }
1425 }
1426
1427 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1428 {
1429         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1430         struct sta_info *sta = NULL;
1431         bool authorized = false;
1432
1433         if (!mgd->powersave)
1434                 return false;
1435
1436         if (mgd->broken_ap)
1437                 return false;
1438
1439         if (!mgd->associated)
1440                 return false;
1441
1442         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1443                 return false;
1444
1445         if (!mgd->have_beacon)
1446                 return false;
1447
1448         rcu_read_lock();
1449         sta = sta_info_get(sdata, mgd->bssid);
1450         if (sta)
1451                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1452         rcu_read_unlock();
1453
1454         return authorized;
1455 }
1456
1457 /* need to hold RTNL or interface lock */
1458 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1459 {
1460         struct ieee80211_sub_if_data *sdata, *found = NULL;
1461         int count = 0;
1462         int timeout;
1463
1464         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1465                 local->ps_sdata = NULL;
1466                 return;
1467         }
1468
1469         list_for_each_entry(sdata, &local->interfaces, list) {
1470                 if (!ieee80211_sdata_running(sdata))
1471                         continue;
1472                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1473                         /* If an AP vif is found, then disable PS
1474                          * by setting the count to zero thereby setting
1475                          * ps_sdata to NULL.
1476                          */
1477                         count = 0;
1478                         break;
1479                 }
1480                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1481                         continue;
1482                 found = sdata;
1483                 count++;
1484         }
1485
1486         if (count == 1 && ieee80211_powersave_allowed(found)) {
1487                 s32 beaconint_us;
1488
1489                 if (latency < 0)
1490                         latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1491
1492                 beaconint_us = ieee80211_tu_to_usec(
1493                                         found->vif.bss_conf.beacon_int);
1494
1495                 timeout = local->dynamic_ps_forced_timeout;
1496                 if (timeout < 0) {
1497                         /*
1498                          * Go to full PSM if the user configures a very low
1499                          * latency requirement.
1500                          * The 2000 second value is there for compatibility
1501                          * until the PM_QOS_NETWORK_LATENCY is configured
1502                          * with real values.
1503                          */
1504                         if (latency > (1900 * USEC_PER_MSEC) &&
1505                             latency != (2000 * USEC_PER_SEC))
1506                                 timeout = 0;
1507                         else
1508                                 timeout = 100;
1509                 }
1510                 local->hw.conf.dynamic_ps_timeout = timeout;
1511
1512                 if (beaconint_us > latency) {
1513                         local->ps_sdata = NULL;
1514                 } else {
1515                         int maxslp = 1;
1516                         u8 dtimper = found->u.mgd.dtim_period;
1517
1518                         /* If the TIM IE is invalid, pretend the value is 1 */
1519                         if (!dtimper)
1520                                 dtimper = 1;
1521                         else if (dtimper > 1)
1522                                 maxslp = min_t(int, dtimper,
1523                                                     latency / beaconint_us);
1524
1525                         local->hw.conf.max_sleep_period = maxslp;
1526                         local->hw.conf.ps_dtim_period = dtimper;
1527                         local->ps_sdata = found;
1528                 }
1529         } else {
1530                 local->ps_sdata = NULL;
1531         }
1532
1533         ieee80211_change_ps(local);
1534 }
1535
1536 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1537 {
1538         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1539
1540         if (sdata->vif.bss_conf.ps != ps_allowed) {
1541                 sdata->vif.bss_conf.ps = ps_allowed;
1542                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1543         }
1544 }
1545
1546 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1547 {
1548         struct ieee80211_local *local =
1549                 container_of(work, struct ieee80211_local,
1550                              dynamic_ps_disable_work);
1551
1552         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1553                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1554                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1555         }
1556
1557         ieee80211_wake_queues_by_reason(&local->hw,
1558                                         IEEE80211_MAX_QUEUE_MAP,
1559                                         IEEE80211_QUEUE_STOP_REASON_PS,
1560                                         false);
1561 }
1562
1563 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1564 {
1565         struct ieee80211_local *local =
1566                 container_of(work, struct ieee80211_local,
1567                              dynamic_ps_enable_work);
1568         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1569         struct ieee80211_if_managed *ifmgd;
1570         unsigned long flags;
1571         int q;
1572
1573         /* can only happen when PS was just disabled anyway */
1574         if (!sdata)
1575                 return;
1576
1577         ifmgd = &sdata->u.mgd;
1578
1579         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1580                 return;
1581
1582         if (local->hw.conf.dynamic_ps_timeout > 0) {
1583                 /* don't enter PS if TX frames are pending */
1584                 if (drv_tx_frames_pending(local)) {
1585                         mod_timer(&local->dynamic_ps_timer, jiffies +
1586                                   msecs_to_jiffies(
1587                                   local->hw.conf.dynamic_ps_timeout));
1588                         return;
1589                 }
1590
1591                 /*
1592                  * transmission can be stopped by others which leads to
1593                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1594                  * is not the actual idle state.
1595                  */
1596                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1597                 for (q = 0; q < local->hw.queues; q++) {
1598                         if (local->queue_stop_reasons[q]) {
1599                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1600                                                        flags);
1601                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1602                                           msecs_to_jiffies(
1603                                           local->hw.conf.dynamic_ps_timeout));
1604                                 return;
1605                         }
1606                 }
1607                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1608         }
1609
1610         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1611             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1612                 if (drv_tx_frames_pending(local)) {
1613                         mod_timer(&local->dynamic_ps_timer, jiffies +
1614                                   msecs_to_jiffies(
1615                                   local->hw.conf.dynamic_ps_timeout));
1616                 } else {
1617                         ieee80211_send_nullfunc(local, sdata, 1);
1618                         /* Flush to get the tx status of nullfunc frame */
1619                         ieee80211_flush_queues(local, sdata, false);
1620                 }
1621         }
1622
1623         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1624               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1625             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1626                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1627                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1628                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1629         }
1630 }
1631
1632 void ieee80211_dynamic_ps_timer(unsigned long data)
1633 {
1634         struct ieee80211_local *local = (void *) data;
1635
1636         if (local->quiescing || local->suspended)
1637                 return;
1638
1639         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1640 }
1641
1642 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1643 {
1644         struct delayed_work *delayed_work =
1645                 container_of(work, struct delayed_work, work);
1646         struct ieee80211_sub_if_data *sdata =
1647                 container_of(delayed_work, struct ieee80211_sub_if_data,
1648                              dfs_cac_timer_work);
1649         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1650
1651         mutex_lock(&sdata->local->mtx);
1652         if (sdata->wdev.cac_started) {
1653                 ieee80211_vif_release_channel(sdata);
1654                 cfg80211_cac_event(sdata->dev, &chandef,
1655                                    NL80211_RADAR_CAC_FINISHED,
1656                                    GFP_KERNEL);
1657         }
1658         mutex_unlock(&sdata->local->mtx);
1659 }
1660
1661 static bool
1662 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1663 {
1664         struct ieee80211_local *local = sdata->local;
1665         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1666         bool ret = false;
1667         int ac;
1668
1669         if (local->hw.queues < IEEE80211_NUM_ACS)
1670                 return false;
1671
1672         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1673                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1674                 int non_acm_ac;
1675                 unsigned long now = jiffies;
1676
1677                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1678                     tx_tspec->admitted_time &&
1679                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1680                         tx_tspec->consumed_tx_time = 0;
1681                         tx_tspec->time_slice_start = now;
1682
1683                         if (tx_tspec->downgraded)
1684                                 tx_tspec->action =
1685                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1686                 }
1687
1688                 switch (tx_tspec->action) {
1689                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1690                         /* take the original parameters */
1691                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[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                         tx_tspec->downgraded = false;
1697                         ret = true;
1698                         break;
1699                 case TX_TSPEC_ACTION_DOWNGRADE:
1700                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1701                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1702                                 ret = true;
1703                                 break;
1704                         }
1705                         /* downgrade next lower non-ACM AC */
1706                         for (non_acm_ac = ac + 1;
1707                              non_acm_ac < IEEE80211_NUM_ACS;
1708                              non_acm_ac++)
1709                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1710                                         break;
1711                         /* The loop will result in using BK even if it requires
1712                          * admission control, such configuration makes no sense
1713                          * and we have to transmit somehow - the AC selection
1714                          * does the same thing.
1715                          */
1716                         if (drv_conf_tx(local, sdata, ac,
1717                                         &sdata->tx_conf[non_acm_ac]))
1718                                 sdata_err(sdata,
1719                                           "failed to set TX queue parameters for queue %d\n",
1720                                           ac);
1721                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1722                         ret = true;
1723                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1724                                 tx_tspec->time_slice_start + HZ - now + 1);
1725                         break;
1726                 case TX_TSPEC_ACTION_NONE:
1727                         /* nothing now */
1728                         break;
1729                 }
1730         }
1731
1732         return ret;
1733 }
1734
1735 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1736 {
1737         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1738                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1739 }
1740
1741 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1742 {
1743         struct ieee80211_sub_if_data *sdata;
1744
1745         sdata = container_of(work, struct ieee80211_sub_if_data,
1746                              u.mgd.tx_tspec_wk.work);
1747         ieee80211_sta_handle_tspec_ac_params(sdata);
1748 }
1749
1750 /* MLME */
1751 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1752                                      struct ieee80211_sub_if_data *sdata,
1753                                      const u8 *wmm_param, size_t wmm_param_len)
1754 {
1755         struct ieee80211_tx_queue_params params;
1756         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1757         size_t left;
1758         int count;
1759         const u8 *pos;
1760         u8 uapsd_queues = 0;
1761
1762         if (!local->ops->conf_tx)
1763                 return false;
1764
1765         if (local->hw.queues < IEEE80211_NUM_ACS)
1766                 return false;
1767
1768         if (!wmm_param)
1769                 return false;
1770
1771         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1772                 return false;
1773
1774         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1775                 uapsd_queues = ifmgd->uapsd_queues;
1776
1777         count = wmm_param[6] & 0x0f;
1778         if (count == ifmgd->wmm_last_param_set)
1779                 return false;
1780         ifmgd->wmm_last_param_set = count;
1781
1782         pos = wmm_param + 8;
1783         left = wmm_param_len - 8;
1784
1785         memset(&params, 0, sizeof(params));
1786
1787         sdata->wmm_acm = 0;
1788         for (; left >= 4; left -= 4, pos += 4) {
1789                 int aci = (pos[0] >> 5) & 0x03;
1790                 int acm = (pos[0] >> 4) & 0x01;
1791                 bool uapsd = false;
1792                 int queue;
1793
1794                 switch (aci) {
1795                 case 1: /* AC_BK */
1796                         queue = 3;
1797                         if (acm)
1798                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1799                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1800                                 uapsd = true;
1801                         break;
1802                 case 2: /* AC_VI */
1803                         queue = 1;
1804                         if (acm)
1805                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1806                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1807                                 uapsd = true;
1808                         break;
1809                 case 3: /* AC_VO */
1810                         queue = 0;
1811                         if (acm)
1812                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1813                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1814                                 uapsd = true;
1815                         break;
1816                 case 0: /* AC_BE */
1817                 default:
1818                         queue = 2;
1819                         if (acm)
1820                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1821                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1822                                 uapsd = true;
1823                         break;
1824                 }
1825
1826                 params.aifs = pos[0] & 0x0f;
1827                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1828                 params.cw_min = ecw2cw(pos[1] & 0x0f);
1829                 params.txop = get_unaligned_le16(pos + 2);
1830                 params.acm = acm;
1831                 params.uapsd = uapsd;
1832
1833                 mlme_dbg(sdata,
1834                          "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1835                          queue, aci, acm,
1836                          params.aifs, params.cw_min, params.cw_max,
1837                          params.txop, params.uapsd,
1838                          ifmgd->tx_tspec[queue].downgraded);
1839                 sdata->tx_conf[queue] = params;
1840                 if (!ifmgd->tx_tspec[queue].downgraded &&
1841                     drv_conf_tx(local, sdata, queue, &params))
1842                         sdata_err(sdata,
1843                                   "failed to set TX queue parameters for queue %d\n",
1844                                   queue);
1845         }
1846
1847         /* enable WMM or activate new settings */
1848         sdata->vif.bss_conf.qos = true;
1849         return true;
1850 }
1851
1852 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1853 {
1854         lockdep_assert_held(&sdata->local->mtx);
1855
1856         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1857         ieee80211_run_deferred_scan(sdata->local);
1858 }
1859
1860 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1861 {
1862         mutex_lock(&sdata->local->mtx);
1863         __ieee80211_stop_poll(sdata);
1864         mutex_unlock(&sdata->local->mtx);
1865 }
1866
1867 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1868                                            u16 capab, bool erp_valid, u8 erp)
1869 {
1870         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1871         u32 changed = 0;
1872         bool use_protection;
1873         bool use_short_preamble;
1874         bool use_short_slot;
1875
1876         if (erp_valid) {
1877                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1878                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1879         } else {
1880                 use_protection = false;
1881                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1882         }
1883
1884         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1885         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1886                 use_short_slot = true;
1887
1888         if (use_protection != bss_conf->use_cts_prot) {
1889                 bss_conf->use_cts_prot = use_protection;
1890                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1891         }
1892
1893         if (use_short_preamble != bss_conf->use_short_preamble) {
1894                 bss_conf->use_short_preamble = use_short_preamble;
1895                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1896         }
1897
1898         if (use_short_slot != bss_conf->use_short_slot) {
1899                 bss_conf->use_short_slot = use_short_slot;
1900                 changed |= BSS_CHANGED_ERP_SLOT;
1901         }
1902
1903         return changed;
1904 }
1905
1906 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1907                                      struct cfg80211_bss *cbss,
1908                                      u32 bss_info_changed)
1909 {
1910         struct ieee80211_bss *bss = (void *)cbss->priv;
1911         struct ieee80211_local *local = sdata->local;
1912         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1913
1914         bss_info_changed |= BSS_CHANGED_ASSOC;
1915         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1916                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1917
1918         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1919                 beacon_loss_count * bss_conf->beacon_int));
1920
1921         sdata->u.mgd.associated = cbss;
1922         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1923
1924         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1925
1926         if (sdata->vif.p2p) {
1927                 const struct cfg80211_bss_ies *ies;
1928
1929                 rcu_read_lock();
1930                 ies = rcu_dereference(cbss->ies);
1931                 if (ies) {
1932                         int ret;
1933
1934                         ret = cfg80211_get_p2p_attr(
1935                                         ies->data, ies->len,
1936                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1937                                         (u8 *) &bss_conf->p2p_noa_attr,
1938                                         sizeof(bss_conf->p2p_noa_attr));
1939                         if (ret >= 2) {
1940                                 sdata->u.mgd.p2p_noa_index =
1941                                         bss_conf->p2p_noa_attr.index;
1942                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1943                         }
1944                 }
1945                 rcu_read_unlock();
1946         }
1947
1948         /* just to be sure */
1949         ieee80211_stop_poll(sdata);
1950
1951         ieee80211_led_assoc(local, 1);
1952
1953         if (sdata->u.mgd.have_beacon) {
1954                 /*
1955                  * If the AP is buggy we may get here with no DTIM period
1956                  * known, so assume it's 1 which is the only safe assumption
1957                  * in that case, although if the TIM IE is broken powersave
1958                  * probably just won't work at all.
1959                  */
1960                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1961                 bss_conf->beacon_rate = bss->beacon_rate;
1962                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1963         } else {
1964                 bss_conf->beacon_rate = NULL;
1965                 bss_conf->dtim_period = 0;
1966         }
1967
1968         bss_conf->assoc = 1;
1969
1970         /* Tell the driver to monitor connection quality (if supported) */
1971         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1972             bss_conf->cqm_rssi_thold)
1973                 bss_info_changed |= BSS_CHANGED_CQM;
1974
1975         /* Enable ARP filtering */
1976         if (bss_conf->arp_addr_cnt)
1977                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1978
1979         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1980
1981         mutex_lock(&local->iflist_mtx);
1982         ieee80211_recalc_ps(local, -1);
1983         mutex_unlock(&local->iflist_mtx);
1984
1985         ieee80211_recalc_smps(sdata);
1986         ieee80211_recalc_ps_vif(sdata);
1987
1988         netif_carrier_on(sdata->dev);
1989 }
1990
1991 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1992                                    u16 stype, u16 reason, bool tx,
1993                                    u8 *frame_buf)
1994 {
1995         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1996         struct ieee80211_local *local = sdata->local;
1997         u32 changed = 0;
1998
1999         sdata_assert_lock(sdata);
2000
2001         if (WARN_ON_ONCE(tx && !frame_buf))
2002                 return;
2003
2004         if (WARN_ON(!ifmgd->associated))
2005                 return;
2006
2007         ieee80211_stop_poll(sdata);
2008
2009         ifmgd->associated = NULL;
2010         netif_carrier_off(sdata->dev);
2011
2012         /*
2013          * if we want to get out of ps before disassoc (why?) we have
2014          * to do it before sending disassoc, as otherwise the null-packet
2015          * won't be valid.
2016          */
2017         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2018                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2019                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2020         }
2021         local->ps_sdata = NULL;
2022
2023         /* disable per-vif ps */
2024         ieee80211_recalc_ps_vif(sdata);
2025
2026         /* make sure ongoing transmission finishes */
2027         synchronize_net();
2028
2029         /*
2030          * drop any frame before deauth/disassoc, this can be data or
2031          * management frame. Since we are disconnecting, we should not
2032          * insist sending these frames which can take time and delay
2033          * the disconnection and possible the roaming.
2034          */
2035         if (tx)
2036                 ieee80211_flush_queues(local, sdata, true);
2037
2038         /* deauthenticate/disassociate now */
2039         if (tx || frame_buf)
2040                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2041                                                reason, tx, frame_buf);
2042
2043         /* flush out frame - make sure the deauth was actually sent */
2044         if (tx)
2045                 ieee80211_flush_queues(local, sdata, false);
2046
2047         /* clear bssid only after building the needed mgmt frames */
2048         memset(ifmgd->bssid, 0, ETH_ALEN);
2049
2050         /* remove AP and TDLS peers */
2051         sta_info_flush(sdata);
2052
2053         /* finally reset all BSS / config parameters */
2054         changed |= ieee80211_reset_erp_info(sdata);
2055
2056         ieee80211_led_assoc(local, 0);
2057         changed |= BSS_CHANGED_ASSOC;
2058         sdata->vif.bss_conf.assoc = false;
2059
2060         ifmgd->p2p_noa_index = -1;
2061         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2062                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2063
2064         /* on the next assoc, re-program HT/VHT parameters */
2065         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2066         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2067         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2068         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2069
2070         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2071
2072         del_timer_sync(&local->dynamic_ps_timer);
2073         cancel_work_sync(&local->dynamic_ps_enable_work);
2074
2075         /* Disable ARP filtering */
2076         if (sdata->vif.bss_conf.arp_addr_cnt)
2077                 changed |= BSS_CHANGED_ARP_FILTER;
2078
2079         sdata->vif.bss_conf.qos = false;
2080         changed |= BSS_CHANGED_QOS;
2081
2082         /* The BSSID (not really interesting) and HT changed */
2083         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2084         ieee80211_bss_info_change_notify(sdata, changed);
2085
2086         /* disassociated - set to defaults now */
2087         ieee80211_set_wmm_default(sdata, false);
2088
2089         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2090         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2091         del_timer_sync(&sdata->u.mgd.timer);
2092         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2093
2094         sdata->vif.bss_conf.dtim_period = 0;
2095         sdata->vif.bss_conf.beacon_rate = NULL;
2096
2097         ifmgd->have_beacon = false;
2098
2099         ifmgd->flags = 0;
2100         mutex_lock(&local->mtx);
2101         ieee80211_vif_release_channel(sdata);
2102
2103         sdata->vif.csa_active = false;
2104         ifmgd->csa_waiting_bcn = false;
2105         ifmgd->csa_ignored_same_chan = false;
2106         if (sdata->csa_block_tx) {
2107                 ieee80211_wake_vif_queues(local, sdata,
2108                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2109                 sdata->csa_block_tx = false;
2110         }
2111         mutex_unlock(&local->mtx);
2112
2113         /* existing TX TSPEC sessions no longer exist */
2114         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2115         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2116
2117         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2118 }
2119
2120 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2121                              struct ieee80211_hdr *hdr)
2122 {
2123         /*
2124          * We can postpone the mgd.timer whenever receiving unicast frames
2125          * from AP because we know that the connection is working both ways
2126          * at that time. But multicast frames (and hence also beacons) must
2127          * be ignored here, because we need to trigger the timer during
2128          * data idle periods for sending the periodic probe request to the
2129          * AP we're connected to.
2130          */
2131         if (is_multicast_ether_addr(hdr->addr1))
2132                 return;
2133
2134         ieee80211_sta_reset_conn_monitor(sdata);
2135 }
2136
2137 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2138 {
2139         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2140         struct ieee80211_local *local = sdata->local;
2141
2142         mutex_lock(&local->mtx);
2143         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2144                 goto out;
2145
2146         __ieee80211_stop_poll(sdata);
2147
2148         mutex_lock(&local->iflist_mtx);
2149         ieee80211_recalc_ps(local, -1);
2150         mutex_unlock(&local->iflist_mtx);
2151
2152         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
2153                 goto out;
2154
2155         /*
2156          * We've received a probe response, but are not sure whether
2157          * we have or will be receiving any beacons or data, so let's
2158          * schedule the timers again, just in case.
2159          */
2160         ieee80211_sta_reset_beacon_monitor(sdata);
2161
2162         mod_timer(&ifmgd->conn_mon_timer,
2163                   round_jiffies_up(jiffies +
2164                                    IEEE80211_CONNECTION_IDLE_TIME));
2165 out:
2166         mutex_unlock(&local->mtx);
2167 }
2168
2169 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2170                                            struct ieee80211_hdr *hdr,
2171                                            u16 tx_time)
2172 {
2173         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2174         u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2175         int ac = ieee80211_ac_from_tid(tid);
2176         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2177         unsigned long now = jiffies;
2178
2179         if (likely(!tx_tspec->admitted_time))
2180                 return;
2181
2182         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2183                 tx_tspec->consumed_tx_time = 0;
2184                 tx_tspec->time_slice_start = now;
2185
2186                 if (tx_tspec->downgraded) {
2187                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2188                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2189                 }
2190         }
2191
2192         if (tx_tspec->downgraded)
2193                 return;
2194
2195         tx_tspec->consumed_tx_time += tx_time;
2196
2197         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2198                 tx_tspec->downgraded = true;
2199                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2200                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2201         }
2202 }
2203
2204 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2205                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2206 {
2207         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2208
2209         if (!ieee80211_is_data(hdr->frame_control))
2210             return;
2211
2212         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2213             sdata->u.mgd.probe_send_count > 0) {
2214                 if (ack)
2215                         ieee80211_sta_reset_conn_monitor(sdata);
2216                 else
2217                         sdata->u.mgd.nullfunc_failed = true;
2218                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2219                 return;
2220         }
2221
2222         if (ack)
2223                 ieee80211_sta_reset_conn_monitor(sdata);
2224 }
2225
2226 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2227 {
2228         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2229         const u8 *ssid;
2230         u8 *dst = ifmgd->associated->bssid;
2231         u8 unicast_limit = max(1, max_probe_tries - 3);
2232
2233         /*
2234          * Try sending broadcast probe requests for the last three
2235          * probe requests after the first ones failed since some
2236          * buggy APs only support broadcast probe requests.
2237          */
2238         if (ifmgd->probe_send_count >= unicast_limit)
2239                 dst = NULL;
2240
2241         /*
2242          * When the hardware reports an accurate Tx ACK status, it's
2243          * better to send a nullfunc frame instead of a probe request,
2244          * as it will kick us off the AP quickly if we aren't associated
2245          * anymore. The timeout will be reset if the frame is ACKed by
2246          * the AP.
2247          */
2248         ifmgd->probe_send_count++;
2249
2250         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2251                 ifmgd->nullfunc_failed = false;
2252                 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2253         } else {
2254                 int ssid_len;
2255
2256                 rcu_read_lock();
2257                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2258                 if (WARN_ON_ONCE(ssid == NULL))
2259                         ssid_len = 0;
2260                 else
2261                         ssid_len = ssid[1];
2262
2263                 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
2264                                          ssid + 2, ssid_len, NULL,
2265                                          0, (u32) -1, true, 0,
2266                                          ifmgd->associated->channel, false);
2267                 rcu_read_unlock();
2268         }
2269
2270         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2271         run_again(sdata, ifmgd->probe_timeout);
2272 }
2273
2274 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2275                                    bool beacon)
2276 {
2277         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2278         bool already = false;
2279
2280         if (!ieee80211_sdata_running(sdata))
2281                 return;
2282
2283         sdata_lock(sdata);
2284
2285         if (!ifmgd->associated)
2286                 goto out;
2287
2288         mutex_lock(&sdata->local->mtx);
2289
2290         if (sdata->local->tmp_channel || sdata->local->scanning) {
2291                 mutex_unlock(&sdata->local->mtx);
2292                 goto out;
2293         }
2294
2295         if (beacon) {
2296                 mlme_dbg_ratelimited(sdata,
2297                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2298                                      beacon_loss_count);
2299
2300                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2301         }
2302
2303         /*
2304          * The driver/our work has already reported this event or the
2305          * connection monitoring has kicked in and we have already sent
2306          * a probe request. Or maybe the AP died and the driver keeps
2307          * reporting until we disassociate...
2308          *
2309          * In either case we have to ignore the current call to this
2310          * function (except for setting the correct probe reason bit)
2311          * because otherwise we would reset the timer every time and
2312          * never check whether we received a probe response!
2313          */
2314         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2315                 already = true;
2316
2317         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2318
2319         mutex_unlock(&sdata->local->mtx);
2320
2321         if (already)
2322                 goto out;
2323
2324         mutex_lock(&sdata->local->iflist_mtx);
2325         ieee80211_recalc_ps(sdata->local, -1);
2326         mutex_unlock(&sdata->local->iflist_mtx);
2327
2328         ifmgd->probe_send_count = 0;
2329         ieee80211_mgd_probe_ap_send(sdata);
2330  out:
2331         sdata_unlock(sdata);
2332 }
2333
2334 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2335                                           struct ieee80211_vif *vif)
2336 {
2337         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2338         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2339         struct cfg80211_bss *cbss;
2340         struct sk_buff *skb;
2341         const u8 *ssid;
2342         int ssid_len;
2343
2344         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2345                 return NULL;
2346
2347         sdata_assert_lock(sdata);
2348
2349         if (ifmgd->associated)
2350                 cbss = ifmgd->associated;
2351         else if (ifmgd->auth_data)
2352                 cbss = ifmgd->auth_data->bss;
2353         else if (ifmgd->assoc_data)
2354                 cbss = ifmgd->assoc_data->bss;
2355         else
2356                 return NULL;
2357
2358         rcu_read_lock();
2359         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2360         if (WARN_ON_ONCE(ssid == NULL))
2361                 ssid_len = 0;
2362         else
2363                 ssid_len = ssid[1];
2364
2365         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2366                                         (u32) -1, cbss->channel,
2367                                         ssid + 2, ssid_len,
2368                                         NULL, 0, true);
2369         rcu_read_unlock();
2370
2371         return skb;
2372 }
2373 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2374
2375 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2376 {
2377         struct ieee80211_local *local = sdata->local;
2378         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2379         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2380
2381         sdata_lock(sdata);
2382         if (!ifmgd->associated) {
2383                 sdata_unlock(sdata);
2384                 return;
2385         }
2386
2387         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2388                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2389                                true, frame_buf);
2390         mutex_lock(&local->mtx);
2391         sdata->vif.csa_active = false;
2392         ifmgd->csa_waiting_bcn = false;
2393         if (sdata->csa_block_tx) {
2394                 ieee80211_wake_vif_queues(local, sdata,
2395                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2396                 sdata->csa_block_tx = false;
2397         }
2398         mutex_unlock(&local->mtx);
2399
2400         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2401                               IEEE80211_DEAUTH_FRAME_LEN);
2402         sdata_unlock(sdata);
2403 }
2404
2405 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2406 {
2407         struct ieee80211_sub_if_data *sdata =
2408                 container_of(work, struct ieee80211_sub_if_data,
2409                              u.mgd.beacon_connection_loss_work);
2410         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2411         struct sta_info *sta;
2412
2413         if (ifmgd->associated) {
2414                 rcu_read_lock();
2415                 sta = sta_info_get(sdata, ifmgd->bssid);
2416                 if (sta)
2417                         sta->beacon_loss_count++;
2418                 rcu_read_unlock();
2419         }
2420
2421         if (ifmgd->connection_loss) {
2422                 sdata_info(sdata, "Connection to AP %pM lost\n",
2423                            ifmgd->bssid);
2424                 __ieee80211_disconnect(sdata);
2425         } else {
2426                 ieee80211_mgd_probe_ap(sdata, true);
2427         }
2428 }
2429
2430 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2431 {
2432         struct ieee80211_sub_if_data *sdata =
2433                 container_of(work, struct ieee80211_sub_if_data,
2434                              u.mgd.csa_connection_drop_work);
2435
2436         __ieee80211_disconnect(sdata);
2437 }
2438
2439 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2440 {
2441         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2442         struct ieee80211_hw *hw = &sdata->local->hw;
2443
2444         trace_api_beacon_loss(sdata);
2445
2446         sdata->u.mgd.connection_loss = false;
2447         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2448 }
2449 EXPORT_SYMBOL(ieee80211_beacon_loss);
2450
2451 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2452 {
2453         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2454         struct ieee80211_hw *hw = &sdata->local->hw;
2455
2456         trace_api_connection_loss(sdata);
2457
2458         sdata->u.mgd.connection_loss = true;
2459         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2460 }
2461 EXPORT_SYMBOL(ieee80211_connection_loss);
2462
2463
2464 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2465                                         bool assoc)
2466 {
2467         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2468
2469         sdata_assert_lock(sdata);
2470
2471         if (!assoc) {
2472                 /*
2473                  * we are not authenticated yet, the only timer that could be
2474                  * running is the timeout for the authentication response which
2475                  * which is not relevant anymore.
2476                  */
2477                 del_timer_sync(&sdata->u.mgd.timer);
2478                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2479
2480                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2481                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2482                 sdata->u.mgd.flags = 0;
2483                 mutex_lock(&sdata->local->mtx);
2484                 ieee80211_vif_release_channel(sdata);
2485                 mutex_unlock(&sdata->local->mtx);
2486         }
2487
2488         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2489         kfree(auth_data);
2490         sdata->u.mgd.auth_data = NULL;
2491 }
2492
2493 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2494                                      struct ieee80211_mgmt *mgmt, size_t len)
2495 {
2496         struct ieee80211_local *local = sdata->local;
2497         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2498         u8 *pos;
2499         struct ieee802_11_elems elems;
2500         u32 tx_flags = 0;
2501
2502         pos = mgmt->u.auth.variable;
2503         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2504         if (!elems.challenge)
2505                 return;
2506         auth_data->expected_transaction = 4;
2507         drv_mgd_prepare_tx(sdata->local, sdata);
2508         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2509                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2510                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2511         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2512                             elems.challenge - 2, elems.challenge_len + 2,
2513                             auth_data->bss->bssid, auth_data->bss->bssid,
2514                             auth_data->key, auth_data->key_len,
2515                             auth_data->key_idx, tx_flags);
2516 }
2517
2518 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2519                                    struct ieee80211_mgmt *mgmt, size_t len)
2520 {
2521         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2522         u8 bssid[ETH_ALEN];
2523         u16 auth_alg, auth_transaction, status_code;
2524         struct sta_info *sta;
2525
2526         sdata_assert_lock(sdata);
2527
2528         if (len < 24 + 6)
2529                 return;
2530
2531         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2532                 return;
2533
2534         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2535
2536         if (!ether_addr_equal(bssid, mgmt->bssid))
2537                 return;
2538
2539         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2540         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2541         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2542
2543         if (auth_alg != ifmgd->auth_data->algorithm ||
2544             auth_transaction != ifmgd->auth_data->expected_transaction) {
2545                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2546                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2547                            auth_transaction,
2548                            ifmgd->auth_data->expected_transaction);
2549                 return;
2550         }
2551
2552         if (status_code != WLAN_STATUS_SUCCESS) {
2553                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2554                            mgmt->sa, status_code);
2555                 ieee80211_destroy_auth_data(sdata, false);
2556                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2557                 return;
2558         }
2559
2560         switch (ifmgd->auth_data->algorithm) {
2561         case WLAN_AUTH_OPEN:
2562         case WLAN_AUTH_LEAP:
2563         case WLAN_AUTH_FT:
2564         case WLAN_AUTH_SAE:
2565                 break;
2566         case WLAN_AUTH_SHARED_KEY:
2567                 if (ifmgd->auth_data->expected_transaction != 4) {
2568                         ieee80211_auth_challenge(sdata, mgmt, len);
2569                         /* need another frame */
2570                         return;
2571                 }
2572                 break;
2573         default:
2574                 WARN_ONCE(1, "invalid auth alg %d",
2575                           ifmgd->auth_data->algorithm);
2576                 return;
2577         }
2578
2579         sdata_info(sdata, "authenticated\n");
2580         ifmgd->auth_data->done = true;
2581         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2582         ifmgd->auth_data->timeout_started = true;
2583         run_again(sdata, ifmgd->auth_data->timeout);
2584
2585         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2586             ifmgd->auth_data->expected_transaction != 2) {
2587                 /*
2588                  * Report auth frame to user space for processing since another
2589                  * round of Authentication frames is still needed.
2590                  */
2591                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2592                 return;
2593         }
2594
2595         /* move station state to auth */
2596         mutex_lock(&sdata->local->sta_mtx);
2597         sta = sta_info_get(sdata, bssid);
2598         if (!sta) {
2599                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2600                 goto out_err;
2601         }
2602         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2603                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2604                 goto out_err;
2605         }
2606         mutex_unlock(&sdata->local->sta_mtx);
2607
2608         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2609         return;
2610  out_err:
2611         mutex_unlock(&sdata->local->sta_mtx);
2612         /* ignore frame -- wait for timeout */
2613 }
2614
2615 #define case_WLAN(type) \
2616         case WLAN_REASON_##type: return #type
2617
2618 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2619 {
2620         switch (reason_code) {
2621         case_WLAN(UNSPECIFIED);
2622         case_WLAN(PREV_AUTH_NOT_VALID);
2623         case_WLAN(DEAUTH_LEAVING);
2624         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2625         case_WLAN(DISASSOC_AP_BUSY);
2626         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2627         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2628         case_WLAN(DISASSOC_STA_HAS_LEFT);
2629         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2630         case_WLAN(DISASSOC_BAD_POWER);
2631         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2632         case_WLAN(INVALID_IE);
2633         case_WLAN(MIC_FAILURE);
2634         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2635         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2636         case_WLAN(IE_DIFFERENT);
2637         case_WLAN(INVALID_GROUP_CIPHER);
2638         case_WLAN(INVALID_PAIRWISE_CIPHER);
2639         case_WLAN(INVALID_AKMP);
2640         case_WLAN(UNSUPP_RSN_VERSION);
2641         case_WLAN(INVALID_RSN_IE_CAP);
2642         case_WLAN(IEEE8021X_FAILED);
2643         case_WLAN(CIPHER_SUITE_REJECTED);
2644         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2645         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2646         case_WLAN(DISASSOC_LOW_ACK);
2647         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2648         case_WLAN(QSTA_LEAVE_QBSS);
2649         case_WLAN(QSTA_NOT_USE);
2650         case_WLAN(QSTA_REQUIRE_SETUP);
2651         case_WLAN(QSTA_TIMEOUT);
2652         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2653         case_WLAN(MESH_PEER_CANCELED);
2654         case_WLAN(MESH_MAX_PEERS);
2655         case_WLAN(MESH_CONFIG);
2656         case_WLAN(MESH_CLOSE);
2657         case_WLAN(MESH_MAX_RETRIES);
2658         case_WLAN(MESH_CONFIRM_TIMEOUT);
2659         case_WLAN(MESH_INVALID_GTK);
2660         case_WLAN(MESH_INCONSISTENT_PARAM);
2661         case_WLAN(MESH_INVALID_SECURITY);
2662         case_WLAN(MESH_PATH_ERROR);
2663         case_WLAN(MESH_PATH_NOFORWARD);
2664         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2665         case_WLAN(MAC_EXISTS_IN_MBSS);
2666         case_WLAN(MESH_CHAN_REGULATORY);
2667         case_WLAN(MESH_CHAN);
2668         default: return "<unknown>";
2669         }
2670 }
2671
2672 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2673                                      struct ieee80211_mgmt *mgmt, size_t len)
2674 {
2675         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2676         const u8 *bssid = NULL;
2677         u16 reason_code;
2678
2679         sdata_assert_lock(sdata);
2680
2681         if (len < 24 + 2)
2682                 return;
2683
2684         if (!ifmgd->associated ||
2685             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2686                 return;
2687
2688         bssid = ifmgd->associated->bssid;
2689
2690         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2691
2692         sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2693                    bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2694
2695         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2696
2697         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2698 }
2699
2700
2701 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2702                                        struct ieee80211_mgmt *mgmt, size_t len)
2703 {
2704         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2705         u16 reason_code;
2706
2707         sdata_assert_lock(sdata);
2708
2709         if (len < 24 + 2)
2710                 return;
2711
2712         if (!ifmgd->associated ||
2713             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2714                 return;
2715
2716         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2717
2718         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2719                    mgmt->sa, reason_code);
2720
2721         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2722
2723         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2724 }
2725
2726 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2727                                 u8 *supp_rates, unsigned int supp_rates_len,
2728                                 u32 *rates, u32 *basic_rates,
2729                                 bool *have_higher_than_11mbit,
2730                                 int *min_rate, int *min_rate_index,
2731                                 int shift, u32 rate_flags)
2732 {
2733         int i, j;
2734
2735         for (i = 0; i < supp_rates_len; i++) {
2736                 int rate = supp_rates[i] & 0x7f;
2737                 bool is_basic = !!(supp_rates[i] & 0x80);
2738
2739                 if ((rate * 5 * (1 << shift)) > 110)
2740                         *have_higher_than_11mbit = true;
2741
2742                 /*
2743                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2744                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2745                  *
2746                  * Note: Even through the membership selector and the basic
2747                  *       rate flag share the same bit, they are not exactly
2748                  *       the same.
2749                  */
2750                 if (!!(supp_rates[i] & 0x80) &&
2751                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2752                         continue;
2753
2754                 for (j = 0; j < sband->n_bitrates; j++) {
2755                         struct ieee80211_rate *br;
2756                         int brate;
2757
2758                         br = &sband->bitrates[j];
2759                         if ((rate_flags & br->flags) != rate_flags)
2760                                 continue;
2761
2762                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2763                         if (brate == rate) {
2764                                 *rates |= BIT(j);
2765                                 if (is_basic)
2766                                         *basic_rates |= BIT(j);
2767                                 if ((rate * 5) < *min_rate) {
2768                                         *min_rate = rate * 5;
2769                                         *min_rate_index = j;
2770                                 }
2771                                 break;
2772                         }
2773                 }
2774         }
2775 }
2776
2777 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2778                                          bool assoc)
2779 {
2780         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2781
2782         sdata_assert_lock(sdata);
2783
2784         if (!assoc) {
2785                 /*
2786                  * we are not associated yet, the only timer that could be
2787                  * running is the timeout for the association response which
2788                  * which is not relevant anymore.
2789                  */
2790                 del_timer_sync(&sdata->u.mgd.timer);
2791                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2792
2793                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2794                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2795                 sdata->u.mgd.flags = 0;
2796                 mutex_lock(&sdata->local->mtx);
2797                 ieee80211_vif_release_channel(sdata);
2798                 mutex_unlock(&sdata->local->mtx);
2799         }
2800
2801         kfree(assoc_data);
2802         sdata->u.mgd.assoc_data = NULL;
2803 }
2804
2805 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2806                                     struct cfg80211_bss *cbss,
2807                                     struct ieee80211_mgmt *mgmt, size_t len)
2808 {
2809         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2810         struct ieee80211_local *local = sdata->local;
2811         struct ieee80211_supported_band *sband;
2812         struct sta_info *sta;
2813         u8 *pos;
2814         u16 capab_info, aid;
2815         struct ieee802_11_elems elems;
2816         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2817         const struct cfg80211_bss_ies *bss_ies = NULL;
2818         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2819         u32 changed = 0;
2820         int err;
2821         bool ret;
2822
2823         /* AssocResp and ReassocResp have identical structure */
2824
2825         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2826         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2827
2828         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2829                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2830                            aid);
2831         aid &= ~(BIT(15) | BIT(14));
2832
2833         ifmgd->broken_ap = false;
2834
2835         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2836                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2837                            aid);
2838                 aid = 0;
2839                 ifmgd->broken_ap = true;
2840         }
2841
2842         pos = mgmt->u.assoc_resp.variable;
2843         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2844
2845         if (!elems.supp_rates) {
2846                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2847                 return false;
2848         }
2849
2850         ifmgd->aid = aid;
2851         ifmgd->tdls_chan_switch_prohibited =
2852                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2853                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2854
2855         /*
2856          * Some APs are erroneously not including some information in their
2857          * (re)association response frames. Try to recover by using the data
2858          * from the beacon or probe response. This seems to afflict mobile
2859          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2860          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2861          */
2862         if ((assoc_data->wmm && !elems.wmm_param) ||
2863             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2864              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2865             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2866              (!elems.vht_cap_elem || !elems.vht_operation))) {
2867                 const struct cfg80211_bss_ies *ies;
2868                 struct ieee802_11_elems bss_elems;
2869
2870                 rcu_read_lock();
2871                 ies = rcu_dereference(cbss->ies);
2872                 if (ies)
2873                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2874                                           GFP_ATOMIC);
2875                 rcu_read_unlock();
2876                 if (!bss_ies)
2877                         return false;
2878
2879                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2880                                        false, &bss_elems);
2881                 if (assoc_data->wmm &&
2882                     !elems.wmm_param && bss_elems.wmm_param) {
2883                         elems.wmm_param = bss_elems.wmm_param;
2884                         sdata_info(sdata,
2885                                    "AP bug: WMM param missing from AssocResp\n");
2886                 }
2887
2888                 /*
2889                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2890                  * have to include the IEs in the (re)association response.
2891                  */
2892                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2893                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2894                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2895                         sdata_info(sdata,
2896                                    "AP bug: HT capability missing from AssocResp\n");
2897                 }
2898                 if (!elems.ht_operation && bss_elems.ht_operation &&
2899                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2900                         elems.ht_operation = bss_elems.ht_operation;
2901                         sdata_info(sdata,
2902                                    "AP bug: HT operation missing from AssocResp\n");
2903                 }
2904                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2905                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2906                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2907                         sdata_info(sdata,
2908                                    "AP bug: VHT capa missing from AssocResp\n");
2909                 }
2910                 if (!elems.vht_operation && bss_elems.vht_operation &&
2911                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2912                         elems.vht_operation = bss_elems.vht_operation;
2913                         sdata_info(sdata,
2914                                    "AP bug: VHT operation missing from AssocResp\n");
2915                 }
2916         }
2917
2918         /*
2919          * We previously checked these in the beacon/probe response, so
2920          * they should be present here. This is just a safety net.
2921          */
2922         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2923             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2924                 sdata_info(sdata,
2925                            "HT AP is missing WMM params or HT capability/operation\n");
2926                 ret = false;
2927                 goto out;
2928         }
2929
2930         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2931             (!elems.vht_cap_elem || !elems.vht_operation)) {
2932                 sdata_info(sdata,
2933                            "VHT AP is missing VHT capability/operation\n");
2934                 ret = false;
2935                 goto out;
2936         }
2937
2938         mutex_lock(&sdata->local->sta_mtx);
2939         /*
2940          * station info was already allocated and inserted before
2941          * the association and should be available to us
2942          */
2943         sta = sta_info_get(sdata, cbss->bssid);
2944         if (WARN_ON(!sta)) {
2945                 mutex_unlock(&sdata->local->sta_mtx);
2946                 ret = false;
2947                 goto out;
2948         }
2949
2950         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2951
2952         /* Set up internal HT/VHT capabilities */
2953         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2954                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2955                                                   elems.ht_cap_elem, sta);
2956
2957         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2958                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2959                                                     elems.vht_cap_elem, sta);
2960
2961         /*
2962          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2963          * in their association response, so ignore that data for our own
2964          * configuration. If it changed since the last beacon, we'll get the
2965          * next beacon and update then.
2966          */
2967
2968         /*
2969          * If an operating mode notification IE is present, override the
2970          * NSS calculation (that would be done in rate_control_rate_init())
2971          * and use the # of streams from that element.
2972          */
2973         if (elems.opmode_notif &&
2974             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2975                 u8 nss;
2976
2977                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2978                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2979                 nss += 1;
2980                 sta->sta.rx_nss = nss;
2981         }
2982
2983         rate_control_rate_init(sta);
2984
2985         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2986                 set_sta_flag(sta, WLAN_STA_MFP);
2987
2988         sta->sta.wme = elems.wmm_param;
2989
2990         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2991         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2992                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2993         if (err) {
2994                 sdata_info(sdata,
2995                            "failed to move station %pM to desired state\n",
2996                            sta->sta.addr);
2997                 WARN_ON(__sta_info_destroy(sta));
2998                 mutex_unlock(&sdata->local->sta_mtx);
2999                 ret = false;
3000                 goto out;
3001         }
3002
3003         mutex_unlock(&sdata->local->sta_mtx);
3004
3005         /*
3006          * Always handle WMM once after association regardless
3007          * of the first value the AP uses. Setting -1 here has
3008          * that effect because the AP values is an unsigned
3009          * 4-bit value.
3010          */
3011         ifmgd->wmm_last_param_set = -1;
3012
3013         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
3014                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3015                                          elems.wmm_param_len);
3016         else
3017                 ieee80211_set_wmm_default(sdata, false);
3018         changed |= BSS_CHANGED_QOS;
3019
3020         /* set AID and assoc capability,
3021          * ieee80211_set_associated() will tell the driver */
3022         bss_conf->aid = aid;
3023         bss_conf->assoc_capability = capab_info;
3024         ieee80211_set_associated(sdata, cbss, changed);
3025
3026         /*
3027          * If we're using 4-addr mode, let the AP know that we're
3028          * doing so, so that it can create the STA VLAN on its side
3029          */
3030         if (ifmgd->use_4addr)
3031                 ieee80211_send_4addr_nullfunc(local, sdata);
3032
3033         /*
3034          * Start timer to probe the connection to the AP now.
3035          * Also start the timer that will detect beacon loss.
3036          */
3037         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3038         ieee80211_sta_reset_beacon_monitor(sdata);
3039
3040         ret = true;
3041  out:
3042         kfree(bss_ies);
3043         return ret;
3044 }
3045
3046 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3047                                          struct ieee80211_mgmt *mgmt,
3048                                          size_t len)
3049 {
3050         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3051         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3052         u16 capab_info, status_code, aid;
3053         struct ieee802_11_elems elems;
3054         int ac, uapsd_queues = -1;
3055         u8 *pos;
3056         bool reassoc;
3057         struct cfg80211_bss *bss;
3058
3059         sdata_assert_lock(sdata);
3060
3061         if (!assoc_data)
3062                 return;
3063         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3064                 return;
3065
3066         /*
3067          * AssocResp and ReassocResp have identical structure, so process both
3068          * of them in this function.
3069          */
3070
3071         if (len < 24 + 6)
3072                 return;
3073
3074         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3075         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3076         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3077         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3078
3079         sdata_info(sdata,
3080                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3081                    reassoc ? "Rea" : "A", mgmt->sa,
3082                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3083
3084         pos = mgmt->u.assoc_resp.variable;
3085         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3086
3087         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3088             elems.timeout_int &&
3089             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3090                 u32 tu, ms;
3091                 tu = le32_to_cpu(elems.timeout_int->value);
3092                 ms = tu * 1024 / 1000;
3093                 sdata_info(sdata,
3094                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3095                            mgmt->sa, tu, ms);
3096                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3097                 assoc_data->timeout_started = true;
3098                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3099                         run_again(sdata, assoc_data->timeout);
3100                 return;
3101         }
3102
3103         bss = assoc_data->bss;
3104
3105         if (status_code != WLAN_STATUS_SUCCESS) {
3106                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3107                            mgmt->sa, status_code);
3108                 ieee80211_destroy_assoc_data(sdata, false);
3109         } else {
3110                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3111                         /* oops -- internal error -- send timeout for now */
3112                         ieee80211_destroy_assoc_data(sdata, false);
3113                         cfg80211_assoc_timeout(sdata->dev, bss);
3114                         return;
3115                 }
3116                 sdata_info(sdata, "associated\n");
3117
3118                 /*
3119                  * destroy assoc_data afterwards, as otherwise an idle
3120                  * recalc after assoc_data is NULL but before associated
3121                  * is set can cause the interface to go idle
3122                  */
3123                 ieee80211_destroy_assoc_data(sdata, true);
3124
3125                 /* get uapsd queues configuration */
3126                 uapsd_queues = 0;
3127                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3128                         if (sdata->tx_conf[ac].uapsd)
3129                                 uapsd_queues |= BIT(ac);
3130         }
3131
3132         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3133 }
3134
3135 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3136                                   struct ieee80211_mgmt *mgmt, size_t len,
3137                                   struct ieee80211_rx_status *rx_status,
3138                                   struct ieee802_11_elems *elems)
3139 {
3140         struct ieee80211_local *local = sdata->local;
3141         struct ieee80211_bss *bss;
3142         struct ieee80211_channel *channel;
3143
3144         sdata_assert_lock(sdata);
3145
3146         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3147         if (!channel)
3148                 return;
3149
3150         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3151                                         channel);
3152         if (bss) {
3153                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3154                 ieee80211_rx_bss_put(local, bss);
3155         }
3156 }
3157
3158
3159 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3160                                          struct sk_buff *skb)
3161 {
3162         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3163         struct ieee80211_if_managed *ifmgd;
3164         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3165         size_t baselen, len = skb->len;
3166         struct ieee802_11_elems elems;
3167
3168         ifmgd = &sdata->u.mgd;
3169
3170         sdata_assert_lock(sdata);
3171
3172         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3173                 return; /* ignore ProbeResp to foreign address */
3174
3175         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3176         if (baselen > len)
3177                 return;
3178
3179         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3180                                false, &elems);
3181
3182         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3183
3184         if (ifmgd->associated &&
3185             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3186                 ieee80211_reset_ap_probe(sdata);
3187
3188         if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
3189             ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
3190                 /* got probe response, continue with auth */
3191                 sdata_info(sdata, "direct probe responded\n");
3192                 ifmgd->auth_data->tries = 0;
3193                 ifmgd->auth_data->timeout = jiffies;
3194                 ifmgd->auth_data->timeout_started = true;
3195                 run_again(sdata, ifmgd->auth_data->timeout);
3196         }
3197 }
3198
3199 /*
3200  * This is the canonical list of information elements we care about,
3201  * the filter code also gives us all changes to the Microsoft OUI
3202  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3203  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3204  * changes to requested client power.
3205  *
3206  * We implement beacon filtering in software since that means we can
3207  * avoid processing the frame here and in cfg80211, and userspace
3208  * will not be able to tell whether the hardware supports it or not.
3209  *
3210  * XXX: This list needs to be dynamic -- userspace needs to be able to
3211  *      add items it requires. It also needs to be able to tell us to
3212  *      look out for other vendor IEs.
3213  */
3214 static const u64 care_about_ies =
3215         (1ULL << WLAN_EID_COUNTRY) |
3216         (1ULL << WLAN_EID_ERP_INFO) |
3217         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3218         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3219         (1ULL << WLAN_EID_HT_CAPABILITY) |
3220         (1ULL << WLAN_EID_HT_OPERATION) |
3221         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3222
3223 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3224                                      struct ieee80211_mgmt *mgmt, size_t len,
3225                                      struct ieee80211_rx_status *rx_status)
3226 {
3227         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3228         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3229         size_t baselen;
3230         struct ieee802_11_elems elems;
3231         struct ieee80211_local *local = sdata->local;
3232         struct ieee80211_chanctx_conf *chanctx_conf;
3233         struct ieee80211_channel *chan;
3234         struct sta_info *sta;
3235         u32 changed = 0;
3236         bool erp_valid;
3237         u8 erp_value = 0;
3238         u32 ncrc;
3239         u8 *bssid;
3240         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3241
3242         sdata_assert_lock(sdata);
3243
3244         /* Process beacon from the current BSS */
3245         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3246         if (baselen > len)
3247                 return;
3248
3249         rcu_read_lock();
3250         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3251         if (!chanctx_conf) {
3252                 rcu_read_unlock();
3253                 return;
3254         }
3255
3256         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3257                 rcu_read_unlock();
3258                 return;
3259         }
3260         chan = chanctx_conf->def.chan;
3261         rcu_read_unlock();
3262
3263         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3264             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3265                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3266                                        len - baselen, false, &elems);
3267
3268                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3269                 if (elems.tim && !elems.parse_error) {
3270                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3271                         ifmgd->dtim_period = tim_ie->dtim_period;
3272                 }
3273                 ifmgd->have_beacon = true;
3274                 ifmgd->assoc_data->need_beacon = false;
3275                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3276                         sdata->vif.bss_conf.sync_tsf =
3277                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3278                         sdata->vif.bss_conf.sync_device_ts =
3279                                 rx_status->device_timestamp;
3280                         if (elems.tim)
3281                                 sdata->vif.bss_conf.sync_dtim_count =
3282                                         elems.tim->dtim_count;
3283                         else
3284                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3285                 }
3286                 /* continue assoc process */
3287                 ifmgd->assoc_data->timeout = jiffies;
3288                 ifmgd->assoc_data->timeout_started = true;
3289                 run_again(sdata, ifmgd->assoc_data->timeout);
3290                 return;
3291         }
3292
3293         if (!ifmgd->associated ||
3294             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3295                 return;
3296         bssid = ifmgd->associated->bssid;
3297
3298         /* Track average RSSI from the Beacon frames of the current AP */
3299         ifmgd->last_beacon_signal = rx_status->signal;
3300         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3301                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3302                 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3303                 ifmgd->last_cqm_event_signal = 0;
3304                 ifmgd->count_beacon_signal = 1;
3305                 ifmgd->last_ave_beacon_signal = 0;
3306         } else {
3307                 ifmgd->ave_beacon_signal =
3308                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3309                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3310                          ifmgd->ave_beacon_signal) / 16;
3311                 ifmgd->count_beacon_signal++;
3312         }
3313
3314         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3315             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3316                 int sig = ifmgd->ave_beacon_signal;
3317                 int last_sig = ifmgd->last_ave_beacon_signal;
3318
3319                 /*
3320                  * if signal crosses either of the boundaries, invoke callback
3321                  * with appropriate parameters
3322                  */
3323                 if (sig > ifmgd->rssi_max_thold &&
3324                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3325                         ifmgd->last_ave_beacon_signal = sig;
3326                         drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3327                 } else if (sig < ifmgd->rssi_min_thold &&
3328                            (last_sig >= ifmgd->rssi_max_thold ||
3329                            last_sig == 0)) {
3330                         ifmgd->last_ave_beacon_signal = sig;
3331                         drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3332                 }
3333         }
3334
3335         if (bss_conf->cqm_rssi_thold &&
3336             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3337             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3338                 int sig = ifmgd->ave_beacon_signal / 16;
3339                 int last_event = ifmgd->last_cqm_event_signal;
3340                 int thold = bss_conf->cqm_rssi_thold;
3341                 int hyst = bss_conf->cqm_rssi_hyst;
3342                 if (sig < thold &&
3343                     (last_event == 0 || sig < last_event - hyst)) {
3344                         ifmgd->last_cqm_event_signal = sig;
3345                         ieee80211_cqm_rssi_notify(
3346                                 &sdata->vif,
3347                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3348                                 GFP_KERNEL);
3349                 } else if (sig > thold &&
3350                            (last_event == 0 || sig > last_event + hyst)) {
3351                         ifmgd->last_cqm_event_signal = sig;
3352                         ieee80211_cqm_rssi_notify(
3353                                 &sdata->vif,
3354                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3355                                 GFP_KERNEL);
3356                 }
3357         }
3358
3359         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3360                 mlme_dbg_ratelimited(sdata,
3361                                      "cancelling AP probe due to a received beacon\n");
3362                 ieee80211_reset_ap_probe(sdata);
3363         }
3364
3365         /*
3366          * Push the beacon loss detection into the future since
3367          * we are processing a beacon from the AP just now.
3368          */
3369         ieee80211_sta_reset_beacon_monitor(sdata);
3370
3371         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3372         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3373                                           len - baselen, false, &elems,
3374                                           care_about_ies, ncrc);
3375
3376         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3377                 bool directed_tim = ieee80211_check_tim(elems.tim,
3378                                                         elems.tim_len,
3379                                                         ifmgd->aid);
3380                 if (directed_tim) {
3381                         if (local->hw.conf.dynamic_ps_timeout > 0) {
3382                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3383                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3384                                         ieee80211_hw_config(local,
3385                                                             IEEE80211_CONF_CHANGE_PS);
3386                                 }
3387                                 ieee80211_send_nullfunc(local, sdata, 0);
3388                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
3389                                 local->pspolling = true;
3390
3391                                 /*
3392                                  * Here is assumed that the driver will be
3393                                  * able to send ps-poll frame and receive a
3394                                  * response even though power save mode is
3395                                  * enabled, but some drivers might require
3396                                  * to disable power save here. This needs
3397                                  * to be investigated.
3398                                  */
3399                                 ieee80211_send_pspoll(local, sdata);
3400                         }
3401                 }
3402         }
3403
3404         if (sdata->vif.p2p) {
3405                 struct ieee80211_p2p_noa_attr noa = {};
3406                 int ret;
3407
3408                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3409                                             len - baselen,
3410                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3411                                             (u8 *) &noa, sizeof(noa));
3412                 if (ret >= 2) {
3413                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3414                                 /* valid noa_attr and index changed */
3415                                 sdata->u.mgd.p2p_noa_index = noa.index;
3416                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3417                                 changed |= BSS_CHANGED_P2P_PS;
3418                                 /*
3419                                  * make sure we update all information, the CRC
3420                                  * mechanism doesn't look at P2P attributes.
3421                                  */
3422                                 ifmgd->beacon_crc_valid = false;
3423                         }
3424                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3425                         /* noa_attr not found and we had valid noa_attr before */
3426                         sdata->u.mgd.p2p_noa_index = -1;
3427                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3428                         changed |= BSS_CHANGED_P2P_PS;
3429                         ifmgd->beacon_crc_valid = false;
3430                 }
3431         }
3432
3433         if (ifmgd->csa_waiting_bcn)
3434                 ieee80211_chswitch_post_beacon(sdata);
3435
3436         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3437                 return;
3438         ifmgd->beacon_crc = ncrc;
3439         ifmgd->beacon_crc_valid = true;
3440
3441         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3442
3443         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3444                                          rx_status->device_timestamp,
3445                                          &elems, true);
3446
3447         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3448             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3449                                      elems.wmm_param_len))
3450                 changed |= BSS_CHANGED_QOS;
3451
3452         /*
3453          * If we haven't had a beacon before, tell the driver about the
3454          * DTIM period (and beacon timing if desired) now.
3455          */
3456         if (!ifmgd->have_beacon) {
3457                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3458                 if (elems.tim)
3459                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3460                 else
3461                         bss_conf->dtim_period = 1;
3462
3463                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3464                         sdata->vif.bss_conf.sync_tsf =
3465                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3466                         sdata->vif.bss_conf.sync_device_ts =
3467                                 rx_status->device_timestamp;
3468                         if (elems.tim)
3469                                 sdata->vif.bss_conf.sync_dtim_count =
3470                                         elems.tim->dtim_count;
3471                         else
3472                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3473                 }
3474
3475                 changed |= BSS_CHANGED_BEACON_INFO;
3476                 ifmgd->have_beacon = true;
3477
3478                 mutex_lock(&local->iflist_mtx);
3479                 ieee80211_recalc_ps(local, -1);
3480                 mutex_unlock(&local->iflist_mtx);
3481
3482                 ieee80211_recalc_ps_vif(sdata);
3483         }
3484
3485         if (elems.erp_info) {
3486                 erp_valid = true;
3487                 erp_value = elems.erp_info[0];
3488         } else {
3489                 erp_valid = false;
3490         }
3491         changed |= ieee80211_handle_bss_capability(sdata,
3492                         le16_to_cpu(mgmt->u.beacon.capab_info),
3493                         erp_valid, erp_value);
3494
3495         mutex_lock(&local->sta_mtx);
3496         sta = sta_info_get(sdata, bssid);
3497
3498         if (ieee80211_config_bw(sdata, sta,
3499                                 elems.ht_cap_elem, elems.ht_operation,
3500                                 elems.vht_operation, bssid, &changed)) {
3501                 mutex_unlock(&local->sta_mtx);
3502                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3503                                        WLAN_REASON_DEAUTH_LEAVING,
3504                                        true, deauth_buf);
3505                 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3506                                       sizeof(deauth_buf));
3507                 return;
3508         }
3509
3510         if (sta && elems.opmode_notif)
3511                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3512                                             rx_status->band, true);
3513         mutex_unlock(&local->sta_mtx);
3514
3515         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3516                                                elems.country_elem,
3517                                                elems.country_elem_len,
3518                                                elems.pwr_constr_elem,
3519                                                elems.cisco_dtpc_elem);
3520
3521         ieee80211_bss_info_change_notify(sdata, changed);
3522 }
3523
3524 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3525                                   struct sk_buff *skb)
3526 {
3527         struct ieee80211_rx_status *rx_status;
3528         struct ieee80211_mgmt *mgmt;
3529         u16 fc;
3530         struct ieee802_11_elems elems;
3531         int ies_len;
3532
3533         rx_status = (struct ieee80211_rx_status *) skb->cb;
3534         mgmt = (struct ieee80211_mgmt *) skb->data;
3535         fc = le16_to_cpu(mgmt->frame_control);
3536
3537         sdata_lock(sdata);
3538
3539         switch (fc & IEEE80211_FCTL_STYPE) {
3540         case IEEE80211_STYPE_BEACON:
3541                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3542                 break;
3543         case IEEE80211_STYPE_PROBE_RESP:
3544                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3545                 break;
3546         case IEEE80211_STYPE_AUTH:
3547                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3548                 break;
3549         case IEEE80211_STYPE_DEAUTH:
3550                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3551                 break;
3552         case IEEE80211_STYPE_DISASSOC:
3553                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3554                 break;
3555         case IEEE80211_STYPE_ASSOC_RESP:
3556         case IEEE80211_STYPE_REASSOC_RESP:
3557                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3558                 break;
3559         case IEEE80211_STYPE_ACTION:
3560                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3561                         ies_len = skb->len -
3562                                   offsetof(struct ieee80211_mgmt,
3563                                            u.action.u.chan_switch.variable);
3564
3565                         if (ies_len < 0)
3566                                 break;
3567
3568                         ieee802_11_parse_elems(
3569                                 mgmt->u.action.u.chan_switch.variable,
3570                                 ies_len, true, &elems);
3571
3572                         if (elems.parse_error)
3573                                 break;
3574
3575                         ieee80211_sta_process_chanswitch(sdata,
3576                                                  rx_status->mactime,
3577                                                  rx_status->device_timestamp,
3578                                                  &elems, false);
3579                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3580                         ies_len = skb->len -
3581                                   offsetof(struct ieee80211_mgmt,
3582                                            u.action.u.ext_chan_switch.variable);
3583
3584                         if (ies_len < 0)
3585                                 break;
3586
3587                         ieee802_11_parse_elems(
3588                                 mgmt->u.action.u.ext_chan_switch.variable,
3589                                 ies_len, true, &elems);
3590
3591                         if (elems.parse_error)
3592                                 break;
3593
3594                         /* for the handling code pretend this was also an IE */
3595                         elems.ext_chansw_ie =
3596                                 &mgmt->u.action.u.ext_chan_switch.data;
3597
3598                         ieee80211_sta_process_chanswitch(sdata,
3599                                                  rx_status->mactime,
3600                                                  rx_status->device_timestamp,
3601                                                  &elems, false);
3602                 }
3603                 break;
3604         }
3605         sdata_unlock(sdata);
3606 }
3607
3608 static void ieee80211_sta_timer(unsigned long data)
3609 {
3610         struct ieee80211_sub_if_data *sdata =
3611                 (struct ieee80211_sub_if_data *) data;
3612
3613         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3614 }
3615
3616 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3617                                           u8 *bssid, u8 reason, bool tx)
3618 {
3619         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3620
3621         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3622                                tx, frame_buf);
3623
3624         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3625                               IEEE80211_DEAUTH_FRAME_LEN);
3626 }
3627
3628 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3629 {
3630         struct ieee80211_local *local = sdata->local;
3631         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3632         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3633         u32 tx_flags = 0;
3634
3635         sdata_assert_lock(sdata);
3636
3637         if (WARN_ON_ONCE(!auth_data))
3638                 return -EINVAL;
3639
3640         auth_data->tries++;
3641
3642         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3643                 sdata_info(sdata, "authentication with %pM timed out\n",
3644                            auth_data->bss->bssid);
3645
3646                 /*
3647                  * Most likely AP is not in the range so remove the
3648                  * bss struct for that AP.
3649                  */
3650                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3651
3652                 return -ETIMEDOUT;
3653         }
3654
3655         drv_mgd_prepare_tx(local, sdata);
3656
3657         if (auth_data->bss->proberesp_ies) {
3658                 u16 trans = 1;
3659                 u16 status = 0;
3660
3661                 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3662                            auth_data->bss->bssid, auth_data->tries,
3663                            IEEE80211_AUTH_MAX_TRIES);
3664
3665                 auth_data->expected_transaction = 2;
3666
3667                 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3668                         trans = auth_data->sae_trans;
3669                         status = auth_data->sae_status;
3670                         auth_data->expected_transaction = trans;
3671                 }
3672
3673                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3674                         tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3675                                    IEEE80211_TX_INTFL_MLME_CONN_TX;
3676
3677                 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3678                                     auth_data->data, auth_data->data_len,
3679                                     auth_data->bss->bssid,
3680                                     auth_data->bss->bssid, NULL, 0, 0,
3681                                     tx_flags);
3682         } else {
3683                 const u8 *ssidie;
3684
3685                 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3686                            auth_data->bss->bssid, auth_data->tries,
3687                            IEEE80211_AUTH_MAX_TRIES);
3688
3689                 rcu_read_lock();
3690                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3691                 if (!ssidie) {
3692                         rcu_read_unlock();
3693                         return -EINVAL;
3694                 }
3695                 /*
3696                  * Direct probe is sent to broadcast address as some APs
3697                  * will not answer to direct packet in unassociated state.
3698                  */
3699                 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3700                                          ssidie + 2, ssidie[1],
3701                                          NULL, 0, (u32) -1, true, 0,
3702                                          auth_data->bss->channel, false);
3703                 rcu_read_unlock();
3704         }
3705
3706         if (tx_flags == 0) {
3707                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3708                 auth_data->timeout_started = true;
3709                 run_again(sdata, auth_data->timeout);
3710         } else {
3711                 auth_data->timeout =
3712                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3713                 auth_data->timeout_started = true;
3714                 run_again(sdata, auth_data->timeout);
3715         }
3716
3717         return 0;
3718 }
3719
3720 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3721 {
3722         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3723         struct ieee80211_local *local = sdata->local;
3724
3725         sdata_assert_lock(sdata);
3726
3727         assoc_data->tries++;
3728         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3729                 sdata_info(sdata, "association with %pM timed out\n",
3730                            assoc_data->bss->bssid);
3731
3732                 /*
3733                  * Most likely AP is not in the range so remove the
3734                  * bss struct for that AP.
3735                  */
3736                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3737
3738                 return -ETIMEDOUT;
3739         }
3740
3741         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3742                    assoc_data->bss->bssid, assoc_data->tries,
3743                    IEEE80211_ASSOC_MAX_TRIES);
3744         ieee80211_send_assoc(sdata);
3745
3746         if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3747                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3748                 assoc_data->timeout_started = true;
3749                 run_again(sdata, assoc_data->timeout);
3750         } else {
3751                 assoc_data->timeout =
3752                         round_jiffies_up(jiffies +
3753                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3754                 assoc_data->timeout_started = true;
3755                 run_again(sdata, assoc_data->timeout);
3756         }
3757
3758         return 0;
3759 }
3760
3761 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3762                                   __le16 fc, bool acked)
3763 {
3764         struct ieee80211_local *local = sdata->local;
3765
3766         sdata->u.mgd.status_fc = fc;
3767         sdata->u.mgd.status_acked = acked;
3768         sdata->u.mgd.status_received = true;
3769
3770         ieee80211_queue_work(&local->hw, &sdata->work);
3771 }
3772
3773 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3774 {
3775         struct ieee80211_local *local = sdata->local;
3776         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3777
3778         sdata_lock(sdata);
3779
3780         if (ifmgd->status_received) {
3781                 __le16 fc = ifmgd->status_fc;
3782                 bool status_acked = ifmgd->status_acked;
3783
3784                 ifmgd->status_received = false;
3785                 if (ifmgd->auth_data &&
3786                     (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3787                         if (status_acked) {
3788                                 ifmgd->auth_data->timeout =
3789                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3790                                 run_again(sdata, ifmgd->auth_data->timeout);
3791                         } else {
3792                                 ifmgd->auth_data->timeout = jiffies - 1;
3793                         }
3794                         ifmgd->auth_data->timeout_started = true;
3795                 } else if (ifmgd->assoc_data &&
3796                            (ieee80211_is_assoc_req(fc) ||
3797                             ieee80211_is_reassoc_req(fc))) {
3798                         if (status_acked) {
3799                                 ifmgd->assoc_data->timeout =
3800                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3801                                 run_again(sdata, ifmgd->assoc_data->timeout);
3802                         } else {
3803                                 ifmgd->assoc_data->timeout = jiffies - 1;
3804                         }
3805                         ifmgd->assoc_data->timeout_started = true;
3806                 }
3807         }
3808
3809         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3810             time_after(jiffies, ifmgd->auth_data->timeout)) {
3811                 if (ifmgd->auth_data->done) {
3812                         /*
3813                          * ok ... we waited for assoc but userspace didn't,
3814                          * so let's just kill the auth data
3815                          */
3816                         ieee80211_destroy_auth_data(sdata, false);
3817                 } else if (ieee80211_probe_auth(sdata)) {
3818                         u8 bssid[ETH_ALEN];
3819
3820                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3821
3822                         ieee80211_destroy_auth_data(sdata, false);
3823
3824                         cfg80211_auth_timeout(sdata->dev, bssid);
3825                 }
3826         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3827                 run_again(sdata, ifmgd->auth_data->timeout);
3828
3829         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3830             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3831                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3832                     ieee80211_do_assoc(sdata)) {
3833                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3834
3835                         ieee80211_destroy_assoc_data(sdata, false);
3836                         cfg80211_assoc_timeout(sdata->dev, bss);
3837                 }
3838         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3839                 run_again(sdata, ifmgd->assoc_data->timeout);
3840
3841         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3842             ifmgd->associated) {
3843                 u8 bssid[ETH_ALEN];
3844                 int max_tries;
3845
3846                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3847
3848                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3849                         max_tries = max_nullfunc_tries;
3850                 else
3851                         max_tries = max_probe_tries;
3852
3853                 /* ACK received for nullfunc probing frame */
3854                 if (!ifmgd->probe_send_count)
3855                         ieee80211_reset_ap_probe(sdata);
3856                 else if (ifmgd->nullfunc_failed) {
3857                         if (ifmgd->probe_send_count < max_tries) {
3858                                 mlme_dbg(sdata,
3859                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3860                                          bssid, ifmgd->probe_send_count,
3861                                          max_tries);
3862                                 ieee80211_mgd_probe_ap_send(sdata);
3863                         } else {
3864                                 mlme_dbg(sdata,
3865                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3866                                          bssid);
3867                                 ieee80211_sta_connection_lost(sdata, bssid,
3868                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3869                                         false);
3870                         }
3871                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3872                         run_again(sdata, ifmgd->probe_timeout);
3873                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3874                         mlme_dbg(sdata,
3875                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3876                                  bssid, probe_wait_ms);
3877                         ieee80211_sta_connection_lost(sdata, bssid,
3878                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3879                 } else if (ifmgd->probe_send_count < max_tries) {
3880                         mlme_dbg(sdata,
3881                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3882                                  bssid, probe_wait_ms,
3883                                  ifmgd->probe_send_count, max_tries);
3884                         ieee80211_mgd_probe_ap_send(sdata);
3885                 } else {
3886                         /*
3887                          * We actually lost the connection ... or did we?
3888                          * Let's make sure!
3889                          */
3890                         wiphy_debug(local->hw.wiphy,
3891                                     "%s: No probe response from AP %pM"
3892                                     " after %dms, disconnecting.\n",
3893                                     sdata->name,
3894                                     bssid, probe_wait_ms);
3895
3896                         ieee80211_sta_connection_lost(sdata, bssid,
3897                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3898                 }
3899         }
3900
3901         sdata_unlock(sdata);
3902 }
3903
3904 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3905 {
3906         struct ieee80211_sub_if_data *sdata =
3907                 (struct ieee80211_sub_if_data *) data;
3908         struct ieee80211_local *local = sdata->local;
3909         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3910
3911         if (local->quiescing)
3912                 return;
3913
3914         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3915                 return;
3916
3917         sdata->u.mgd.connection_loss = false;
3918         ieee80211_queue_work(&sdata->local->hw,
3919                              &sdata->u.mgd.beacon_connection_loss_work);
3920 }
3921
3922 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3923 {
3924         struct ieee80211_sub_if_data *sdata =
3925                 (struct ieee80211_sub_if_data *) data;
3926         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3927         struct ieee80211_local *local = sdata->local;
3928
3929         if (local->quiescing)
3930                 return;
3931
3932         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3933                 return;
3934
3935         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3936 }
3937
3938 static void ieee80211_sta_monitor_work(struct work_struct *work)
3939 {
3940         struct ieee80211_sub_if_data *sdata =
3941                 container_of(work, struct ieee80211_sub_if_data,
3942                              u.mgd.monitor_work);
3943
3944         ieee80211_mgd_probe_ap(sdata, false);
3945 }
3946
3947 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3948 {
3949         u32 flags;
3950
3951         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3952                 __ieee80211_stop_poll(sdata);
3953
3954                 /* let's probe the connection once */
3955                 flags = sdata->local->hw.flags;
3956                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3957                         ieee80211_queue_work(&sdata->local->hw,
3958                                              &sdata->u.mgd.monitor_work);
3959                 /* and do all the other regular work too */
3960                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3961         }
3962 }
3963
3964 #ifdef CONFIG_PM
3965 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3966 {
3967         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3968         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3969
3970         sdata_lock(sdata);
3971
3972         if (ifmgd->auth_data || ifmgd->assoc_data) {
3973                 const u8 *bssid = ifmgd->auth_data ?
3974                                 ifmgd->auth_data->bss->bssid :
3975                                 ifmgd->assoc_data->bss->bssid;
3976
3977                 /*
3978                  * If we are trying to authenticate / associate while suspending,
3979                  * cfg80211 won't know and won't actually abort those attempts,
3980                  * thus we need to do that ourselves.
3981                  */
3982                 ieee80211_send_deauth_disassoc(sdata, bssid,
3983                                                IEEE80211_STYPE_DEAUTH,
3984                                                WLAN_REASON_DEAUTH_LEAVING,
3985                                                false, frame_buf);
3986                 if (ifmgd->assoc_data)
3987                         ieee80211_destroy_assoc_data(sdata, false);
3988                 if (ifmgd->auth_data)
3989                         ieee80211_destroy_auth_data(sdata, false);
3990                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3991                                       IEEE80211_DEAUTH_FRAME_LEN);
3992         }
3993
3994         sdata_unlock(sdata);
3995 }
3996
3997 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3998 {
3999         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4000
4001         sdata_lock(sdata);
4002         if (!ifmgd->associated) {
4003                 sdata_unlock(sdata);
4004                 return;
4005         }
4006
4007         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4008                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4009                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4010                 ieee80211_sta_connection_lost(sdata,
4011                                               ifmgd->associated->bssid,
4012                                               WLAN_REASON_UNSPECIFIED,
4013                                               true);
4014                 sdata_unlock(sdata);
4015                 return;
4016         }
4017         sdata_unlock(sdata);
4018 }
4019 #endif
4020
4021 /* interface setup */
4022 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4023 {
4024         struct ieee80211_if_managed *ifmgd;
4025
4026         ifmgd = &sdata->u.mgd;
4027         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4028         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4029         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4030                   ieee80211_beacon_connection_loss_work);
4031         INIT_WORK(&ifmgd->csa_connection_drop_work,
4032                   ieee80211_csa_connection_drop_work);
4033         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4034         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4035                           ieee80211_tdls_peer_del_work);
4036         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4037                     (unsigned long) sdata);
4038         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4039                     (unsigned long) sdata);
4040         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4041                     (unsigned long) sdata);
4042         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4043                     (unsigned long) sdata);
4044         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4045                           ieee80211_sta_handle_tspec_ac_params_wk);
4046
4047         ifmgd->flags = 0;
4048         ifmgd->powersave = sdata->wdev.ps;
4049         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4050         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4051         ifmgd->p2p_noa_index = -1;
4052
4053         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4054                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4055         else
4056                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4057
4058         /* Setup TDLS data */
4059         spin_lock_init(&ifmgd->teardown_lock);
4060         ifmgd->teardown_skb = NULL;
4061         ifmgd->orig_teardown_skb = NULL;
4062 }
4063
4064 /* scan finished notification */
4065 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4066 {
4067         struct ieee80211_sub_if_data *sdata;
4068
4069         /* Restart STA timers */
4070         rcu_read_lock();
4071         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4072                 if (ieee80211_sdata_running(sdata))
4073                         ieee80211_restart_sta_timer(sdata);
4074         }
4075         rcu_read_unlock();
4076 }
4077
4078 int ieee80211_max_network_latency(struct notifier_block *nb,
4079                                   unsigned long data, void *dummy)
4080 {
4081         s32 latency_usec = (s32) data;
4082         struct ieee80211_local *local =
4083                 container_of(nb, struct ieee80211_local,
4084                              network_latency_notifier);
4085
4086         mutex_lock(&local->iflist_mtx);
4087         ieee80211_recalc_ps(local, latency_usec);
4088         mutex_unlock(&local->iflist_mtx);
4089
4090         return NOTIFY_OK;
4091 }
4092
4093 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4094                                      struct cfg80211_bss *cbss)
4095 {
4096         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4097         const u8 *ht_cap_ie, *vht_cap_ie;
4098         const struct ieee80211_ht_cap *ht_cap;
4099         const struct ieee80211_vht_cap *vht_cap;
4100         u8 chains = 1;
4101
4102         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4103                 return chains;
4104
4105         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4106         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4107                 ht_cap = (void *)(ht_cap_ie + 2);
4108                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4109                 /*
4110                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4111                  *       "Tx Unequal Modulation Supported" fields.
4112                  */
4113         }
4114
4115         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4116                 return chains;
4117
4118         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4119         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4120                 u8 nss;
4121                 u16 tx_mcs_map;
4122
4123                 vht_cap = (void *)(vht_cap_ie + 2);
4124                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4125                 for (nss = 8; nss > 0; nss--) {
4126                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4127                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4128                                 break;
4129                 }
4130                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4131                 chains = max(chains, nss);
4132         }
4133
4134         return chains;
4135 }
4136
4137 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4138                                   struct cfg80211_bss *cbss)
4139 {
4140         struct ieee80211_local *local = sdata->local;
4141         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4142         const struct ieee80211_ht_cap *ht_cap = NULL;
4143         const struct ieee80211_ht_operation *ht_oper = NULL;
4144         const struct ieee80211_vht_operation *vht_oper = NULL;
4145         struct ieee80211_supported_band *sband;
4146         struct cfg80211_chan_def chandef;
4147         int ret;
4148
4149         sband = local->hw.wiphy->bands[cbss->channel->band];
4150
4151         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4152                           IEEE80211_STA_DISABLE_80P80MHZ |
4153                           IEEE80211_STA_DISABLE_160MHZ);
4154
4155         rcu_read_lock();
4156
4157         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4158             sband->ht_cap.ht_supported) {
4159                 const u8 *ht_oper_ie, *ht_cap_ie;
4160
4161                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4162                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4163                         ht_oper = (void *)(ht_oper_ie + 2);
4164
4165                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4166                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4167                         ht_cap = (void *)(ht_cap_ie + 2);
4168
4169                 if (!ht_cap) {
4170                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4171                         ht_oper = NULL;
4172                 }
4173         }
4174
4175         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4176             sband->vht_cap.vht_supported) {
4177                 const u8 *vht_oper_ie, *vht_cap;
4178
4179                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4180                                                    WLAN_EID_VHT_OPERATION);
4181                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4182                         vht_oper = (void *)(vht_oper_ie + 2);
4183                 if (vht_oper && !ht_oper) {
4184                         vht_oper = NULL;
4185                         sdata_info(sdata,
4186                                    "AP advertised VHT without HT, disabling both\n");
4187                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4188                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4189                 }
4190
4191                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4192                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4193                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4194                         vht_oper = NULL;
4195                 }
4196         }
4197
4198         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4199                                                      cbss->channel,
4200                                                      ht_cap, ht_oper, vht_oper,
4201                                                      &chandef, false);
4202
4203         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4204                                       local->rx_chains);
4205
4206         rcu_read_unlock();
4207
4208         /* will change later if needed */
4209         sdata->smps_mode = IEEE80211_SMPS_OFF;
4210
4211         mutex_lock(&local->mtx);
4212         /*
4213          * If this fails (possibly due to channel context sharing
4214          * on incompatible channels, e.g. 80+80 and 160 sharing the
4215          * same control channel) try to use a smaller bandwidth.
4216          */
4217         ret = ieee80211_vif_use_channel(sdata, &chandef,
4218                                         IEEE80211_CHANCTX_SHARED);
4219
4220         /* don't downgrade for 5 and 10 MHz channels, though. */
4221         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4222             chandef.width == NL80211_CHAN_WIDTH_10)
4223                 goto out;
4224
4225         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4226                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4227                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4228                                                 IEEE80211_CHANCTX_SHARED);
4229         }
4230  out:
4231         mutex_unlock(&local->mtx);
4232         return ret;
4233 }
4234
4235 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4236                                      struct cfg80211_bss *cbss, bool assoc)
4237 {
4238         struct ieee80211_local *local = sdata->local;
4239         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4240         struct ieee80211_bss *bss = (void *)cbss->priv;
4241         struct sta_info *new_sta = NULL;
4242         struct ieee80211_supported_band *sband;
4243         struct ieee80211_sta_ht_cap sta_ht_cap;
4244         bool have_sta = false, is_override = false;
4245         int err;
4246
4247         sband = local->hw.wiphy->bands[cbss->channel->band];
4248
4249         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4250                 return -EINVAL;
4251
4252         if (assoc) {
4253                 rcu_read_lock();
4254                 have_sta = sta_info_get(sdata, cbss->bssid);
4255                 rcu_read_unlock();
4256         }
4257
4258         if (!have_sta) {
4259                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4260                 if (!new_sta)
4261                         return -ENOMEM;
4262         }
4263
4264         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4265         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4266
4267         is_override = (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) !=
4268                       (sband->ht_cap.cap &
4269                        IEEE80211_HT_CAP_SUP_WIDTH_20_40);
4270
4271         if (new_sta || is_override) {
4272                 err = ieee80211_prep_channel(sdata, cbss);
4273                 if (err) {
4274                         if (new_sta)
4275                                 sta_info_free(local, new_sta);
4276                         return -EINVAL;
4277                 }
4278         }
4279
4280         if (new_sta) {
4281                 u32 rates = 0, basic_rates = 0;
4282                 bool have_higher_than_11mbit;
4283                 int min_rate = INT_MAX, min_rate_index = -1;
4284                 struct ieee80211_chanctx_conf *chanctx_conf;
4285                 const struct cfg80211_bss_ies *ies;
4286                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4287                 u32 rate_flags;
4288
4289                 rcu_read_lock();
4290                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4291                 if (WARN_ON(!chanctx_conf)) {
4292                         rcu_read_unlock();
4293                         sta_info_free(local, new_sta);
4294                         return -EINVAL;
4295                 }
4296                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4297                 rcu_read_unlock();
4298
4299                 ieee80211_get_rates(sband, bss->supp_rates,
4300                                     bss->supp_rates_len,
4301                                     &rates, &basic_rates,
4302                                     &have_higher_than_11mbit,
4303                                     &min_rate, &min_rate_index,
4304                                     shift, rate_flags);
4305
4306                 /*
4307                  * This used to be a workaround for basic rates missing
4308                  * in the association response frame. Now that we no
4309                  * longer use the basic rates from there, it probably
4310                  * doesn't happen any more, but keep the workaround so
4311                  * in case some *other* APs are buggy in different ways
4312                  * we can connect -- with a warning.
4313                  */
4314                 if (!basic_rates && min_rate_index >= 0) {
4315                         sdata_info(sdata,
4316                                    "No basic rates, using min rate instead\n");
4317                         basic_rates = BIT(min_rate_index);
4318                 }
4319
4320                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4321                 sdata->vif.bss_conf.basic_rates = basic_rates;
4322
4323                 /* cf. IEEE 802.11 9.2.12 */
4324                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4325                     have_higher_than_11mbit)
4326                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4327                 else
4328                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4329
4330                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4331
4332                 /* set timing information */
4333                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4334                 rcu_read_lock();
4335                 ies = rcu_dereference(cbss->beacon_ies);
4336                 if (ies) {
4337                         const u8 *tim_ie;
4338
4339                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4340                         sdata->vif.bss_conf.sync_device_ts =
4341                                 bss->device_ts_beacon;
4342                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4343                                                   ies->data, ies->len);
4344                         if (tim_ie && tim_ie[1] >= 2)
4345                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4346                         else
4347                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4348                 } else if (!(local->hw.flags &
4349                                         IEEE80211_HW_TIMING_BEACON_ONLY)) {
4350                         ies = rcu_dereference(cbss->proberesp_ies);
4351                         /* must be non-NULL since beacon IEs were NULL */
4352                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4353                         sdata->vif.bss_conf.sync_device_ts =
4354                                 bss->device_ts_presp;
4355                         sdata->vif.bss_conf.sync_dtim_count = 0;
4356                 } else {
4357                         sdata->vif.bss_conf.sync_tsf = 0;
4358                         sdata->vif.bss_conf.sync_device_ts = 0;
4359                         sdata->vif.bss_conf.sync_dtim_count = 0;
4360                 }
4361                 rcu_read_unlock();
4362
4363                 /* tell driver about BSSID, basic rates and timing */
4364                 ieee80211_bss_info_change_notify(sdata,
4365                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4366                         BSS_CHANGED_BEACON_INT);
4367
4368                 if (assoc)
4369                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4370
4371                 err = sta_info_insert(new_sta);
4372                 new_sta = NULL;
4373                 if (err) {
4374                         sdata_info(sdata,
4375                                    "failed to insert STA entry for the AP (error %d)\n",
4376                                    err);
4377                         return err;
4378                 }
4379         } else
4380                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4381
4382         return 0;
4383 }
4384
4385 /* config hooks */
4386 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4387                        struct cfg80211_auth_request *req)
4388 {
4389         struct ieee80211_local *local = sdata->local;
4390         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4391         struct ieee80211_mgd_auth_data *auth_data;
4392         u16 auth_alg;
4393         int err;
4394
4395         /* prepare auth data structure */
4396
4397         switch (req->auth_type) {
4398         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4399                 auth_alg = WLAN_AUTH_OPEN;
4400                 break;
4401         case NL80211_AUTHTYPE_SHARED_KEY:
4402                 if (IS_ERR(local->wep_tx_tfm))
4403                         return -EOPNOTSUPP;
4404                 auth_alg = WLAN_AUTH_SHARED_KEY;
4405                 break;
4406         case NL80211_AUTHTYPE_FT:
4407                 auth_alg = WLAN_AUTH_FT;
4408                 break;
4409         case NL80211_AUTHTYPE_NETWORK_EAP:
4410                 auth_alg = WLAN_AUTH_LEAP;
4411                 break;
4412         case NL80211_AUTHTYPE_SAE:
4413                 auth_alg = WLAN_AUTH_SAE;
4414                 break;
4415         default:
4416                 return -EOPNOTSUPP;
4417         }
4418
4419         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4420                             req->ie_len, GFP_KERNEL);
4421         if (!auth_data)
4422                 return -ENOMEM;
4423
4424         auth_data->bss = req->bss;
4425
4426         if (req->sae_data_len >= 4) {
4427                 __le16 *pos = (__le16 *) req->sae_data;
4428                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4429                 auth_data->sae_status = le16_to_cpu(pos[1]);
4430                 memcpy(auth_data->data, req->sae_data + 4,
4431                        req->sae_data_len - 4);
4432                 auth_data->data_len += req->sae_data_len - 4;
4433         }
4434
4435         if (req->ie && req->ie_len) {
4436                 memcpy(&auth_data->data[auth_data->data_len],
4437                        req->ie, req->ie_len);
4438                 auth_data->data_len += req->ie_len;
4439         }
4440
4441         if (req->key && req->key_len) {
4442                 auth_data->key_len = req->key_len;
4443                 auth_data->key_idx = req->key_idx;
4444                 memcpy(auth_data->key, req->key, req->key_len);
4445         }
4446
4447         auth_data->algorithm = auth_alg;
4448
4449         /* try to authenticate/probe */
4450
4451         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4452             ifmgd->assoc_data) {
4453                 err = -EBUSY;
4454                 goto err_free;
4455         }
4456
4457         if (ifmgd->auth_data)
4458                 ieee80211_destroy_auth_data(sdata, false);
4459
4460         /* prep auth_data so we don't go into idle on disassoc */
4461         ifmgd->auth_data = auth_data;
4462
4463         if (ifmgd->associated) {
4464                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4465
4466                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4467                                        WLAN_REASON_UNSPECIFIED,
4468                                        false, frame_buf);
4469
4470                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4471                                       sizeof(frame_buf));
4472         }
4473
4474         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4475
4476         err = ieee80211_prep_connection(sdata, req->bss, false);
4477         if (err)
4478                 goto err_clear;
4479
4480         err = ieee80211_probe_auth(sdata);
4481         if (err) {
4482                 sta_info_destroy_addr(sdata, req->bss->bssid);
4483                 goto err_clear;
4484         }
4485
4486         /* hold our own reference */
4487         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4488         return 0;
4489
4490  err_clear:
4491         memset(ifmgd->bssid, 0, ETH_ALEN);
4492         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4493         ifmgd->auth_data = NULL;
4494  err_free:
4495         kfree(auth_data);
4496         return err;
4497 }
4498
4499 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4500                                         const u8 *wmm_param, int len)
4501 {
4502         const u8 *pos;
4503         size_t left;
4504
4505         if (len < 8)
4506                 return false;
4507
4508         if (wmm_param[5] != 1 /* version */)
4509                 return false;
4510
4511         pos = wmm_param + 8;
4512         left = len - 8;
4513
4514         for (; left >= 4; left -= 4, pos += 4) {
4515                 u8 aifsn = pos[0] & 0x0f;
4516                 u8 ecwmin = pos[1] & 0x0f;
4517                 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4518                 int aci = (pos[0] >> 5) & 0x03;
4519
4520                 if (aifsn < 2) {
4521                         sdata_info(sdata,
4522                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4523                                    aifsn, aci);
4524                         return false;
4525                 }
4526                 if (ecwmin > ecwmax) {
4527                         sdata_info(sdata,
4528                                    "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4529                                    ecwmin, ecwmax, aci);
4530                         return false;
4531                 }
4532         }
4533
4534         return true;
4535 }
4536
4537 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4538                         struct cfg80211_assoc_request *req)
4539 {
4540         struct ieee80211_local *local = sdata->local;
4541         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4542         struct ieee80211_bss *bss = (void *)req->bss->priv;
4543         struct ieee80211_mgd_assoc_data *assoc_data;
4544         const struct cfg80211_bss_ies *beacon_ies;
4545         struct ieee80211_supported_band *sband;
4546         const u8 *ssidie, *ht_ie, *vht_ie;
4547         int i, err;
4548
4549         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4550         if (!assoc_data)
4551                 return -ENOMEM;
4552
4553         rcu_read_lock();
4554         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4555         if (!ssidie) {
4556                 rcu_read_unlock();
4557                 kfree(assoc_data);
4558                 return -EINVAL;
4559         }
4560         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4561         assoc_data->ssid_len = ssidie[1];
4562         rcu_read_unlock();
4563
4564         if (ifmgd->associated) {
4565                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4566
4567                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4568                                        WLAN_REASON_UNSPECIFIED,
4569                                        false, frame_buf);
4570
4571                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4572                                       sizeof(frame_buf));
4573         }
4574
4575         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4576                 err = -EBUSY;
4577                 goto err_free;
4578         }
4579
4580         if (ifmgd->assoc_data) {
4581                 err = -EBUSY;
4582                 goto err_free;
4583         }
4584
4585         if (ifmgd->auth_data) {
4586                 bool match;
4587
4588                 /* keep sta info, bssid if matching */
4589                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4590                 ieee80211_destroy_auth_data(sdata, match);
4591         }
4592
4593         /* prepare assoc data */
4594
4595         ifmgd->beacon_crc_valid = false;
4596
4597         assoc_data->wmm = bss->wmm_used &&
4598                           (local->hw.queues >= IEEE80211_NUM_ACS);
4599         if (assoc_data->wmm) {
4600                 /* try to check validity of WMM params IE */
4601                 const struct cfg80211_bss_ies *ies;
4602                 const u8 *wp, *start, *end;
4603
4604                 rcu_read_lock();
4605                 ies = rcu_dereference(req->bss->ies);
4606                 start = ies->data;
4607                 end = start + ies->len;
4608
4609                 while (true) {
4610                         wp = cfg80211_find_vendor_ie(
4611                                 WLAN_OUI_MICROSOFT,
4612                                 WLAN_OUI_TYPE_MICROSOFT_WMM,
4613                                 start, end - start);
4614                         if (!wp)
4615                                 break;
4616                         start = wp + wp[1] + 2;
4617                         /* if this IE is too short, try the next */
4618                         if (wp[1] <= 4)
4619                                 continue;
4620                         /* if this IE is WMM params, we found what we wanted */
4621                         if (wp[6] == 1)
4622                                 break;
4623                 }
4624
4625                 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4626                                                         wp[1] - 2)) {
4627                         assoc_data->wmm = false;
4628                         ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4629                 }
4630                 rcu_read_unlock();
4631         }
4632
4633         /*
4634          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4635          * We still associate in non-HT mode (11a/b/g) if any one of these
4636          * ciphers is configured as pairwise.
4637          * We can set this to true for non-11n hardware, that'll be checked
4638          * separately along with the peer capabilities.
4639          */
4640         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4641                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4642                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4643                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4644                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4645                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4646                         netdev_info(sdata->dev,
4647                                     "disabling HT/VHT due to WEP/TKIP use\n");
4648                 }
4649         }
4650
4651         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4652                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4653                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4654         }
4655
4656         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4657                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4658
4659         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4660         sband = local->hw.wiphy->bands[req->bss->channel->band];
4661         if (!sband->ht_cap.ht_supported ||
4662             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4663             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4664                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4665                 if (!bss->wmm_used &&
4666                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4667                         netdev_info(sdata->dev,
4668                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4669         }
4670
4671         /* disable VHT if we don't support it or the AP doesn't use WMM */
4672         if (!sband->vht_cap.vht_supported ||
4673             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4674             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4675                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4676                 if (!bss->wmm_used &&
4677                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4678                         netdev_info(sdata->dev,
4679                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4680         }
4681
4682         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4683         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4684                sizeof(ifmgd->ht_capa_mask));
4685
4686         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4687         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4688                sizeof(ifmgd->vht_capa_mask));
4689
4690         if (req->ie && req->ie_len) {
4691                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4692                 assoc_data->ie_len = req->ie_len;
4693         }
4694
4695         assoc_data->bss = req->bss;
4696
4697         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4698                 if (ifmgd->powersave)
4699                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4700                 else
4701                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4702         } else
4703                 sdata->smps_mode = ifmgd->req_smps;
4704
4705         assoc_data->capability = req->bss->capability;
4706         assoc_data->supp_rates = bss->supp_rates;
4707         assoc_data->supp_rates_len = bss->supp_rates_len;
4708
4709         rcu_read_lock();
4710         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4711         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4712                 assoc_data->ap_ht_param =
4713                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4714         else
4715                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4716         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4717         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4718                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4719                        sizeof(struct ieee80211_vht_cap));
4720         else
4721                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4722         rcu_read_unlock();
4723
4724         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4725                  (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4726              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4727                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4728
4729         if (bss->wmm_used && bss->uapsd_supported &&
4730             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4731                 assoc_data->uapsd = true;
4732                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4733         } else {
4734                 assoc_data->uapsd = false;
4735                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4736         }
4737
4738         if (req->prev_bssid)
4739                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4740
4741         if (req->use_mfp) {
4742                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4743                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4744         } else {
4745                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4746                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4747         }
4748
4749         if (req->flags & ASSOC_REQ_USE_RRM)
4750                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4751         else
4752                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4753
4754         if (req->crypto.control_port)
4755                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4756         else
4757                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4758
4759         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4760         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4761         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4762                                                         sdata->vif.type);
4763
4764         /* kick off associate process */
4765
4766         ifmgd->assoc_data = assoc_data;
4767         ifmgd->dtim_period = 0;
4768         ifmgd->have_beacon = false;
4769
4770         err = ieee80211_prep_connection(sdata, req->bss, true);
4771         if (err)
4772                 goto err_clear;
4773
4774         rcu_read_lock();
4775         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4776
4777         if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4778             !beacon_ies) {
4779                 /*
4780                  * Wait up to one beacon interval ...
4781                  * should this be more if we miss one?
4782                  */
4783                 sdata_info(sdata, "waiting for beacon from %pM\n",
4784                            ifmgd->bssid);
4785                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4786                 assoc_data->timeout_started = true;
4787                 assoc_data->need_beacon = true;
4788         } else if (beacon_ies) {
4789                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4790                                                     beacon_ies->data,
4791                                                     beacon_ies->len);
4792                 u8 dtim_count = 0;
4793
4794                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4795                         const struct ieee80211_tim_ie *tim;
4796                         tim = (void *)(tim_ie + 2);
4797                         ifmgd->dtim_period = tim->dtim_period;
4798                         dtim_count = tim->dtim_count;
4799                 }
4800                 ifmgd->have_beacon = true;
4801                 assoc_data->timeout = jiffies;
4802                 assoc_data->timeout_started = true;
4803
4804                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4805                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4806                         sdata->vif.bss_conf.sync_device_ts =
4807                                 bss->device_ts_beacon;
4808                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4809                 }
4810         } else {
4811                 assoc_data->timeout = jiffies;
4812                 assoc_data->timeout_started = true;
4813         }
4814         rcu_read_unlock();
4815
4816         run_again(sdata, assoc_data->timeout);
4817
4818         if (bss->corrupt_data) {
4819                 char *corrupt_type = "data";
4820                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4821                         if (bss->corrupt_data &
4822                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4823                                 corrupt_type = "beacon and probe response";
4824                         else
4825                                 corrupt_type = "beacon";
4826                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4827                         corrupt_type = "probe response";
4828                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4829                            corrupt_type);
4830         }
4831
4832         return 0;
4833  err_clear:
4834         memset(ifmgd->bssid, 0, ETH_ALEN);
4835         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4836         ifmgd->assoc_data = NULL;
4837  err_free:
4838         kfree(assoc_data);
4839         return err;
4840 }
4841
4842 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4843                          struct cfg80211_deauth_request *req)
4844 {
4845         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4846         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4847         bool tx = !req->local_state_change;
4848
4849         if (ifmgd->auth_data &&
4850             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4851                 sdata_info(sdata,
4852                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4853                            req->bssid, req->reason_code,
4854                            ieee80211_get_reason_code_string(req->reason_code));
4855
4856                 drv_mgd_prepare_tx(sdata->local, sdata);
4857                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4858                                                IEEE80211_STYPE_DEAUTH,
4859                                                req->reason_code, tx,
4860                                                frame_buf);
4861                 ieee80211_destroy_auth_data(sdata, false);
4862                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4863                                       IEEE80211_DEAUTH_FRAME_LEN);
4864
4865                 return 0;
4866         }
4867
4868         if (ifmgd->associated &&
4869             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4870                 sdata_info(sdata,
4871                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4872                            req->bssid, req->reason_code,
4873                            ieee80211_get_reason_code_string(req->reason_code));
4874
4875                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4876                                        req->reason_code, tx, frame_buf);
4877                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4878                                       IEEE80211_DEAUTH_FRAME_LEN);
4879                 return 0;
4880         }
4881
4882         return -ENOTCONN;
4883 }
4884
4885 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4886                            struct cfg80211_disassoc_request *req)
4887 {
4888         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4889         u8 bssid[ETH_ALEN];
4890         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4891
4892         /*
4893          * cfg80211 should catch this ... but it's racy since
4894          * we can receive a disassoc frame, process it, hand it
4895          * to cfg80211 while that's in a locked section already
4896          * trying to tell us that the user wants to disconnect.
4897          */
4898         if (ifmgd->associated != req->bss)
4899                 return -ENOLINK;
4900
4901         sdata_info(sdata,
4902                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
4903                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4904
4905         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4906         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4907                                req->reason_code, !req->local_state_change,
4908                                frame_buf);
4909
4910         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4911                               IEEE80211_DEAUTH_FRAME_LEN);
4912
4913         return 0;
4914 }
4915
4916 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4917 {
4918         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4919
4920         /*
4921          * Make sure some work items will not run after this,
4922          * they will not do anything but might not have been
4923          * cancelled when disconnecting.
4924          */
4925         cancel_work_sync(&ifmgd->monitor_work);
4926         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4927         cancel_work_sync(&ifmgd->request_smps_work);
4928         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4929         cancel_work_sync(&ifmgd->chswitch_work);
4930         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4931
4932         sdata_lock(sdata);
4933         if (ifmgd->assoc_data) {
4934                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4935                 ieee80211_destroy_assoc_data(sdata, false);
4936                 cfg80211_assoc_timeout(sdata->dev, bss);
4937         }
4938         if (ifmgd->auth_data)
4939                 ieee80211_destroy_auth_data(sdata, false);
4940         spin_lock_bh(&ifmgd->teardown_lock);
4941         if (ifmgd->teardown_skb) {
4942                 kfree_skb(ifmgd->teardown_skb);
4943                 ifmgd->teardown_skb = NULL;
4944                 ifmgd->orig_teardown_skb = NULL;
4945         }
4946         spin_unlock_bh(&ifmgd->teardown_lock);
4947         del_timer_sync(&ifmgd->timer);
4948         sdata_unlock(sdata);
4949 }
4950
4951 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4952                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4953                                gfp_t gfp)
4954 {
4955         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4956
4957         trace_api_cqm_rssi_notify(sdata, rssi_event);
4958
4959         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4960 }
4961 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
4962
4963 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
4964 {
4965         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4966
4967         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
4968
4969         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
4970 }
4971 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);