net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  * Copyright 2013-2014  Intel Mobile Communications GmbH
   9  * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/delay.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/if_arp.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/moduleparam.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/crc32.h>
  24 #include <linux/slab.h>
  25 #include <linux/export.h>
  26 #include <net/mac80211.h>
  27 #include <asm/unaligned.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "led.h"
  33 #include "fils_aead.h"
  34
  35 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  36 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  37 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  38 #define IEEE80211_AUTH_MAX_TRIES        3
  39 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  40 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  41 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  42 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  43 #define IEEE80211_ASSOC_MAX_TRIES       3
  44
  45 static int max_nullfunc_tries = 2;
  46 module_param(max_nullfunc_tries, int, 0644);
  47 MODULE_PARM_DESC(max_nullfunc_tries,
  48                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  49
  50 static int max_probe_tries = 5;
  51 module_param(max_probe_tries, int, 0644);
  52 MODULE_PARM_DESC(max_probe_tries,
  53                  "Maximum probe tries before disconnecting (reason 4).");
  54
  55 /*
  56  * Beacon loss timeout is calculated as N frames times the
  57  * advertised beacon interval.  This may need to be somewhat
  58  * higher than what hardware might detect to account for
  59  * delays in the host processing frames. But since we also
  60  * probe on beacon miss before declaring the connection lost
  61  * default to what we want.
  62  */
  63 static int beacon_loss_count = 7;
  64 module_param(beacon_loss_count, int, 0644);
  65 MODULE_PARM_DESC(beacon_loss_count,
  66                  "Number of beacon intervals before we decide beacon was lost.");
  67
  68 /*
  69  * Time the connection can be idle before we probe
  70  * it to see if we can still talk to the AP.
  71  */
  72 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  73 /*
  74  * Time we wait for a probe response after sending
  75  * a probe request because of beacon loss or for
  76  * checking the connection still works.
  77  */
  78 static int probe_wait_ms = 500;
  79 module_param(probe_wait_ms, int, 0644);
  80 MODULE_PARM_DESC(probe_wait_ms,
  81                  "Maximum time(ms) to wait for probe response"
  82                  " before disconnecting (reason 4).");
  83
  84 /*
  85  * How many Beacon frames need to have been used in average signal strength
  86  * before starting to indicate signal change events.
  87  */
  88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  89
  90 /*
  91  * We can have multiple work items (and connection probing)
  92  * scheduling this timer, but we need to take care to only
  93  * reschedule it when it should fire _earlier_ than it was
  94  * asked for before, or if it's not pending right now. This
  95  * function ensures that. Note that it then is required to
  96  * run this function for all timeouts after the first one
  97  * has happened -- the work that runs from this timer will
  98  * do that.
  99  */
 100 static void run_again(struct ieee80211_sub_if_data *sdata,
 101                       unsigned long timeout)
 102 {
 103         sdata_assert_lock(sdata);
 104
 105         if (!timer_pending(&sdata->u.mgd.timer) ||
 106             time_before(timeout, sdata->u.mgd.timer.expires))
 107                 mod_timer(&sdata->u.mgd.timer, timeout);
 108 }
 109
 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 111 {
 112         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 113                 return;
 114
 115         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 116                 return;
 117
 118         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 119                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 120 }
 121
 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 123 {
 124         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 125
 126         if (unlikely(!ifmgd->associated))
 127                 return;
 128
 129         if (ifmgd->probe_send_count)
 130                 ifmgd->probe_send_count = 0;
 131
 132         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 133                 return;
 134
 135         mod_timer(&ifmgd->conn_mon_timer,
 136                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 137 }
 138
 139 static int ecw2cw(int ecw)
 140 {
 141         return (1 << ecw) - 1;
 142 }
 143
 144 static u32
 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 146                              struct ieee80211_supported_band *sband,
 147                              struct ieee80211_channel *channel,
 148                              const struct ieee80211_ht_cap *ht_cap,
 149                              const struct ieee80211_ht_operation *ht_oper,
 150                              const struct ieee80211_vht_operation *vht_oper,
 151                              struct cfg80211_chan_def *chandef, bool tracking)
 152 {
 153         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 154         struct cfg80211_chan_def vht_chandef;
 155         struct ieee80211_sta_ht_cap sta_ht_cap;
 156         u32 ht_cfreq, ret;
 157
 158         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 159         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 160
 161         chandef->chan = channel;
 162         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 163         chandef->center_freq1 = channel->center_freq;
 164         chandef->center_freq2 = 0;
 165
 166         if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
 167                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 168                 goto out;
 169         }
 170
 171         chandef->width = NL80211_CHAN_WIDTH_20;
 172
 173         if (!(ht_cap->cap_info &
 174               cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
 175                 ret = IEEE80211_STA_DISABLE_40MHZ;
 176                 vht_chandef = *chandef;
 177                 goto out;
 178         }
 179
 180         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 181                                                   channel->band);
 182         /* check that channel matches the right operating channel */
 183         if (!tracking && channel->center_freq != ht_cfreq) {
 184                 /*
 185                  * It's possible that some APs are confused here;
 186                  * Netgear WNDR3700 sometimes reports 4 higher than
 187                  * the actual channel in association responses, but
 188                  * since we look at probe response/beacon data here
 189                  * it should be OK.
 190                  */
 191                 sdata_info(sdata,
 192                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 193                            channel->center_freq, ht_cfreq,
 194                            ht_oper->primary_chan, channel->band);
 195                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 196                 goto out;
 197         }
 198
 199         /* check 40 MHz support, if we have it */
 200         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 201                 ieee80211_chandef_ht_oper(ht_oper, chandef);
 202         } else {
 203                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 204                 ret = IEEE80211_STA_DISABLE_VHT;
 205                 /* also mark 40 MHz disabled */
 206                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 207                 goto out;
 208         }
 209
 210         if (!vht_oper || !sband->vht_cap.vht_supported) {
 211                 ret = IEEE80211_STA_DISABLE_VHT;
 212                 goto out;
 213         }
 214
 215         vht_chandef = *chandef;
 216         if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
 217                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 218                         sdata_info(sdata,
 219                                    "AP VHT information is invalid, disable VHT\n");
 220                 ret = IEEE80211_STA_DISABLE_VHT;
 221                 goto out;
 222         }
 223
 224         if (!cfg80211_chandef_valid(&vht_chandef)) {
 225                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 226                         sdata_info(sdata,
 227                                    "AP VHT information is invalid, disable VHT\n");
 228                 ret = IEEE80211_STA_DISABLE_VHT;
 229                 goto out;
 230         }
 231
 232         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 233                 ret = 0;
 234                 goto out;
 235         }
 236
 237         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 238                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 239                         sdata_info(sdata,
 240                                    "AP VHT information doesn't match HT, disable VHT\n");
 241                 ret = IEEE80211_STA_DISABLE_VHT;
 242                 goto out;
 243         }
 244
 245         *chandef = vht_chandef;
 246
 247         ret = 0;
 248
 249 out:
 250         /*
 251          * When tracking the current AP, don't do any further checks if the
 252          * new chandef is identical to the one we're currently using for the
 253          * connection. This keeps us from playing ping-pong with regulatory,
 254          * without it the following can happen (for example):
 255          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 256          *  - AP advertises regdom US
 257          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 258          *  - the code below detects an unsupported channel, downgrades, and
 259          *    we disconnect from the AP in the caller
 260          *  - disconnect causes CRDA to reload world regdomain and the game
 261          *    starts anew.
 262          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 263          *
 264          * It seems possible that there are still scenarios with CSA or real
 265          * bandwidth changes where a this could happen, but those cases are
 266          * less common and wouldn't completely prevent using the AP.
 267          */
 268         if (tracking &&
 269             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 270                 return ret;
 271
 272         /* don't print the message below for VHT mismatch if VHT is disabled */
 273         if (ret & IEEE80211_STA_DISABLE_VHT)
 274                 vht_chandef = *chandef;
 275
 276         /*
 277          * Ignore the DISABLED flag when we're already connected and only
 278          * tracking the APs beacon for bandwidth changes - otherwise we
 279          * might get disconnected here if we connect to an AP, update our
 280          * regulatory information based on the AP's country IE and the
 281          * information we have is wrong/outdated and disables the channel
 282          * that we're actually using for the connection to the AP.
 283          */
 284         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 285                                         tracking ? 0 :
 286                                                    IEEE80211_CHAN_DISABLED)) {
 287                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 288                         ret = IEEE80211_STA_DISABLE_HT |
 289                               IEEE80211_STA_DISABLE_VHT;
 290                         break;
 291                 }
 292
 293                 ret |= ieee80211_chandef_downgrade(chandef);
 294         }
 295
 296         if (chandef->width != vht_chandef.width && !tracking)
 297                 sdata_info(sdata,
 298                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 299
 300         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 301         return ret;
 302 }
 303
 304 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 305                                struct sta_info *sta,
 306                                const struct ieee80211_ht_cap *ht_cap,
 307                                const struct ieee80211_ht_operation *ht_oper,
 308                                const struct ieee80211_vht_operation *vht_oper,
 309                                const u8 *bssid, u32 *changed)
 310 {
 311         struct ieee80211_local *local = sdata->local;
 312         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 313         struct ieee80211_supported_band *sband;
 314         struct ieee80211_channel *chan;
 315         struct cfg80211_chan_def chandef;
 316         u16 ht_opmode;
 317         u32 flags;
 318         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 319         int ret;
 320
 321         /* if HT was/is disabled, don't track any bandwidth changes */
 322         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 323                 return 0;
 324
 325         /* don't check VHT if we associated as non-VHT station */
 326         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 327                 vht_oper = NULL;
 328
 329         if (WARN_ON_ONCE(!sta))
 330                 return -EINVAL;
 331
 332         /*
 333          * if bss configuration changed store the new one -
 334          * this may be applicable even if channel is identical
 335          */
 336         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 337         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 338                 *changed |= BSS_CHANGED_HT;
 339                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 340         }
 341
 342         chan = sdata->vif.bss_conf.chandef.chan;
 343         sband = local->hw.wiphy->bands[chan->band];
 344
 345         /* calculate new channel (type) based on HT/VHT operation IEs */
 346         flags = ieee80211_determine_chantype(sdata, sband, chan,
 347                                              ht_cap, ht_oper, vht_oper,
 348                                              &chandef, true);
 349
 350         /*
 351          * Downgrade the new channel if we associated with restricted
 352          * capabilities. For example, if we associated as a 20 MHz STA
 353          * to a 40 MHz AP (due to regulatory, capabilities or config
 354          * reasons) then switching to a 40 MHz channel now won't do us
 355          * any good -- we couldn't use it with the AP.
 356          */
 357         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 358             chandef.width == NL80211_CHAN_WIDTH_80P80)
 359                 flags |= ieee80211_chandef_downgrade(&chandef);
 360         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 361             chandef.width == NL80211_CHAN_WIDTH_160)
 362                 flags |= ieee80211_chandef_downgrade(&chandef);
 363         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 364             chandef.width > NL80211_CHAN_WIDTH_20)
 365                 flags |= ieee80211_chandef_downgrade(&chandef);
 366
 367         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 368                 return 0;
 369
 370         sdata_info(sdata,
 371                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 372                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 373                    chandef.center_freq1, chandef.center_freq2);
 374
 375         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 376                                       IEEE80211_STA_DISABLE_VHT |
 377                                       IEEE80211_STA_DISABLE_40MHZ |
 378                                       IEEE80211_STA_DISABLE_80P80MHZ |
 379                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 380             !cfg80211_chandef_valid(&chandef)) {
 381                 sdata_info(sdata,
 382                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 383                            ifmgd->bssid);
 384                 return -EINVAL;
 385         }
 386
 387         switch (chandef.width) {
 388         case NL80211_CHAN_WIDTH_20_NOHT:
 389         case NL80211_CHAN_WIDTH_20:
 390                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 391                 break;
 392         case NL80211_CHAN_WIDTH_40:
 393                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 394                 break;
 395         case NL80211_CHAN_WIDTH_80:
 396                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 397                 break;
 398         case NL80211_CHAN_WIDTH_80P80:
 399         case NL80211_CHAN_WIDTH_160:
 400                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 401                 break;
 402         default:
 403                 return -EINVAL;
 404         }
 405
 406         if (new_sta_bw > sta->cur_max_bandwidth)
 407                 new_sta_bw = sta->cur_max_bandwidth;
 408
 409         if (new_sta_bw < sta->sta.bandwidth) {
 410                 sta->sta.bandwidth = new_sta_bw;
 411                 rate_control_rate_update(local, sband, sta,
 412                                          IEEE80211_RC_BW_CHANGED);
 413         }
 414
 415         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 416         if (ret) {
 417                 sdata_info(sdata,
 418                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 419                            ifmgd->bssid);
 420                 return ret;
 421         }
 422
 423         if (new_sta_bw > sta->sta.bandwidth) {
 424                 sta->sta.bandwidth = new_sta_bw;
 425                 rate_control_rate_update(local, sband, sta,
 426                                          IEEE80211_RC_BW_CHANGED);
 427         }
 428
 429         return 0;
 430 }
 431
 432 /* frame sending functions */
 433
 434 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 435                                 struct sk_buff *skb, u8 ap_ht_param,
 436                                 struct ieee80211_supported_band *sband,
 437                                 struct ieee80211_channel *channel,
 438                                 enum ieee80211_smps_mode smps)
 439 {
 440         u8 *pos;
 441         u32 flags = channel->flags;
 442         u16 cap;
 443         struct ieee80211_sta_ht_cap ht_cap;
 444
 445         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 446
 447         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 448         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 449
 450         /* determine capability flags */
 451         cap = ht_cap.cap;
 452
 453         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 454         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 455                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 456                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 457                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 458                 }
 459                 break;
 460         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 461                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 462                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 463                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 464                 }
 465                 break;
 466         }
 467
 468         /*
 469          * If 40 MHz was disabled associate as though we weren't
 470          * capable of 40 MHz -- some broken APs will never fall
 471          * back to trying to transmit in 20 MHz.
 472          */
 473         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 474                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 475                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 476         }
 477
 478         /* set SM PS mode properly */
 479         cap &= ~IEEE80211_HT_CAP_SM_PS;
 480         switch (smps) {
 481         case IEEE80211_SMPS_AUTOMATIC:
 482         case IEEE80211_SMPS_NUM_MODES:
 483                 WARN_ON(1);
 484         case IEEE80211_SMPS_OFF:
 485                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 486                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 487                 break;
 488         case IEEE80211_SMPS_STATIC:
 489                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 490                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 491                 break;
 492         case IEEE80211_SMPS_DYNAMIC:
 493                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 494                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 495                 break;
 496         }
 497
 498         /* reserve and fill IE */
 499         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 500         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 501 }
 502
 503 /* This function determines vht capability flags for the association
 504  * and builds the IE.
 505  * Note - the function may set the owner of the MU-MIMO capability
 506  */
 507 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 508                                  struct sk_buff *skb,
 509                                  struct ieee80211_supported_band *sband,
 510                                  struct ieee80211_vht_cap *ap_vht_cap)
 511 {
 512         struct ieee80211_local *local = sdata->local;
 513         u8 *pos;
 514         u32 cap;
 515         struct ieee80211_sta_vht_cap vht_cap;
 516         u32 mask, ap_bf_sts, our_bf_sts;
 517
 518         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 519
 520         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 521         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 522
 523         /* determine capability flags */
 524         cap = vht_cap.cap;
 525
 526         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 527                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 528
 529                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 530                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 531                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 532                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 533         }
 534
 535         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 536                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 537                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 538         }
 539
 540         /*
 541          * Some APs apparently get confused if our capabilities are better
 542          * than theirs, so restrict what we advertise in the assoc request.
 543          */
 544         if (!(ap_vht_cap->vht_cap_info &
 545                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 546                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 547                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 548         else if (!(ap_vht_cap->vht_cap_info &
 549                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 550                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 551
 552         /*
 553          * If some other vif is using the MU-MIMO capablity we cannot associate
 554          * using MU-MIMO - this will lead to contradictions in the group-id
 555          * mechanism.
 556          * Ownership is defined since association request, in order to avoid
 557          * simultaneous associations with MU-MIMO.
 558          */
 559         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 560                 bool disable_mu_mimo = false;
 561                 struct ieee80211_sub_if_data *other;
 562
 563                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 564                         if (other->vif.mu_mimo_owner) {
 565                                 disable_mu_mimo = true;
 566                                 break;
 567                         }
 568                 }
 569                 if (disable_mu_mimo)
 570                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 571                 else
 572                         sdata->vif.mu_mimo_owner = true;
 573         }
 574
 575         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 576
 577         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 578         our_bf_sts = cap & mask;
 579
 580         if (ap_bf_sts < our_bf_sts) {
 581                 cap &= ~mask;
 582                 cap |= ap_bf_sts;
 583         }
 584
 585         /* reserve and fill IE */
 586         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 587         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 588 }
 589
 590 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 591 {
 592         struct ieee80211_local *local = sdata->local;
 593         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 594         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 595         struct sk_buff *skb;
 596         struct ieee80211_mgmt *mgmt;
 597         u8 *pos, qos_info;
 598         size_t offset = 0, noffset;
 599         int i, count, rates_len, supp_rates_len, shift;
 600         u16 capab;
 601         struct ieee80211_supported_band *sband;
 602         struct ieee80211_chanctx_conf *chanctx_conf;
 603         struct ieee80211_channel *chan;
 604         u32 rates = 0;
 605
 606         sdata_assert_lock(sdata);
 607
 608         rcu_read_lock();
 609         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 610         if (WARN_ON(!chanctx_conf)) {
 611                 rcu_read_unlock();
 612                 return;
 613         }
 614         chan = chanctx_conf->def.chan;
 615         rcu_read_unlock();
 616         sband = local->hw.wiphy->bands[chan->band];
 617         shift = ieee80211_vif_get_shift(&sdata->vif);
 618
 619         if (assoc_data->supp_rates_len) {
 620                 /*
 621                  * Get all rates supported by the device and the AP as
 622                  * some APs don't like getting a superset of their rates
 623                  * in the association request (e.g. D-Link DAP 1353 in
 624                  * b-only mode)...
 625                  */
 626                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 627                                                      assoc_data->supp_rates,
 628                                                      assoc_data->supp_rates_len,
 629                                                      &rates);
 630         } else {
 631                 /*
 632                  * In case AP not provide any supported rates information
 633                  * before association, we send information element(s) with
 634                  * all rates that we support.
 635                  */
 636                 rates_len = 0;
 637                 for (i = 0; i < sband->n_bitrates; i++) {
 638                         rates |= BIT(i);
 639                         rates_len++;
 640                 }
 641         }
 642
 643         skb = alloc_skb(local->hw.extra_tx_headroom +
 644                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 645                         2 + assoc_data->ssid_len + /* SSID */
 646                         4 + rates_len + /* (extended) rates */
 647                         4 + /* power capability */
 648                         2 + 2 * sband->n_channels + /* supported channels */
 649                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 650                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 651                         assoc_data->ie_len + /* extra IEs */
 652                         (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
 653                         9, /* WMM */
 654                         GFP_KERNEL);
 655         if (!skb)
 656                 return;
 657
 658         skb_reserve(skb, local->hw.extra_tx_headroom);
 659
 660         capab = WLAN_CAPABILITY_ESS;
 661
 662         if (sband->band == NL80211_BAND_2GHZ) {
 663                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 664                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 665         }
 666
 667         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 668                 capab |= WLAN_CAPABILITY_PRIVACY;
 669
 670         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 671             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 672                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 673
 674         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 675                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 676
 677         mgmt = skb_put_zero(skb, 24);
 678         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 679         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 680         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 681
 682         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 683                 skb_put(skb, 10);
 684                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 685                                                   IEEE80211_STYPE_REASSOC_REQ);
 686                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 687                 mgmt->u.reassoc_req.listen_interval =
 688                                 cpu_to_le16(local->hw.conf.listen_interval);
 689                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 690                        ETH_ALEN);
 691         } else {
 692                 skb_put(skb, 4);
 693                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 694                                                   IEEE80211_STYPE_ASSOC_REQ);
 695                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 696                 mgmt->u.assoc_req.listen_interval =
 697                                 cpu_to_le16(local->hw.conf.listen_interval);
 698         }
 699
 700         /* SSID */
 701         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 702         *pos++ = WLAN_EID_SSID;
 703         *pos++ = assoc_data->ssid_len;
 704         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 705
 706         /* add all rates which were marked to be used above */
 707         supp_rates_len = rates_len;
 708         if (supp_rates_len > 8)
 709                 supp_rates_len = 8;
 710
 711         pos = skb_put(skb, supp_rates_len + 2);
 712         *pos++ = WLAN_EID_SUPP_RATES;
 713         *pos++ = supp_rates_len;
 714
 715         count = 0;
 716         for (i = 0; i < sband->n_bitrates; i++) {
 717                 if (BIT(i) & rates) {
 718                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 719                                                 5 * (1 << shift));
 720                         *pos++ = (u8) rate;
 721                         if (++count == 8)
 722                                 break;
 723                 }
 724         }
 725
 726         if (rates_len > count) {
 727                 pos = skb_put(skb, rates_len - count + 2);
 728                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 729                 *pos++ = rates_len - count;
 730
 731                 for (i++; i < sband->n_bitrates; i++) {
 732                         if (BIT(i) & rates) {
 733                                 int rate;
 734                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 735                                                     5 * (1 << shift));
 736                                 *pos++ = (u8) rate;
 737                         }
 738                 }
 739         }
 740
 741         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 742             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 743                 pos = skb_put(skb, 4);
 744                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 745                 *pos++ = 2;
 746                 *pos++ = 0; /* min tx power */
 747                  /* max tx power */
 748                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 749         }
 750
 751         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 752                 /* TODO: get this in reg domain format */
 753                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 754                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 755                 *pos++ = 2 * sband->n_channels;
 756                 for (i = 0; i < sband->n_channels; i++) {
 757                         *pos++ = ieee80211_frequency_to_channel(
 758                                         sband->channels[i].center_freq);
 759                         *pos++ = 1; /* one channel in the subband*/
 760                 }
 761         }
 762
 763         /* if present, add any custom IEs that go before HT */
 764         if (assoc_data->ie_len) {
 765                 static const u8 before_ht[] = {
 766                         WLAN_EID_SSID,
 767                         WLAN_EID_SUPP_RATES,
 768                         WLAN_EID_EXT_SUPP_RATES,
 769                         WLAN_EID_PWR_CAPABILITY,
 770                         WLAN_EID_SUPPORTED_CHANNELS,
 771                         WLAN_EID_RSN,
 772                         WLAN_EID_QOS_CAPA,
 773                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 774                         WLAN_EID_MOBILITY_DOMAIN,
 775                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 776                         WLAN_EID_RIC_DATA,              /* reassoc only */
 777                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 778                 };
 779                 static const u8 after_ric[] = {
 780                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 781                         WLAN_EID_HT_CAPABILITY,
 782                         WLAN_EID_BSS_COEX_2040,
 783                         WLAN_EID_EXT_CAPABILITY,
 784                         WLAN_EID_QOS_TRAFFIC_CAPA,
 785                         WLAN_EID_TIM_BCAST_REQ,
 786                         WLAN_EID_INTERWORKING,
 787                         /* 60GHz doesn't happen right now */
 788                         WLAN_EID_VHT_CAPABILITY,
 789                         WLAN_EID_OPMODE_NOTIF,
 790                 };
 791
 792                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 793                                                  assoc_data->ie_len,
 794                                                  before_ht,
 795                                                  ARRAY_SIZE(before_ht),
 796                                                  after_ric,
 797                                                  ARRAY_SIZE(after_ric),
 798                                                  offset);
 799                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 800                 offset = noffset;
 801         }
 802
 803         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 804                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 805                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 806
 807         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 808                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 809                                     sband, chan, sdata->smps_mode);
 810
 811         /* if present, add any custom IEs that go before VHT */
 812         if (assoc_data->ie_len) {
 813                 static const u8 before_vht[] = {
 814                         WLAN_EID_SSID,
 815                         WLAN_EID_SUPP_RATES,
 816                         WLAN_EID_EXT_SUPP_RATES,
 817                         WLAN_EID_PWR_CAPABILITY,
 818                         WLAN_EID_SUPPORTED_CHANNELS,
 819                         WLAN_EID_RSN,
 820                         WLAN_EID_QOS_CAPA,
 821                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 822                         WLAN_EID_MOBILITY_DOMAIN,
 823                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 824                         WLAN_EID_HT_CAPABILITY,
 825                         WLAN_EID_BSS_COEX_2040,
 826                         WLAN_EID_EXT_CAPABILITY,
 827                         WLAN_EID_QOS_TRAFFIC_CAPA,
 828                         WLAN_EID_TIM_BCAST_REQ,
 829                         WLAN_EID_INTERWORKING,
 830                 };
 831
 832                 /* RIC already taken above, so no need to handle here anymore */
 833                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 834                                              before_vht, ARRAY_SIZE(before_vht),
 835                                              offset);
 836                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 837                 offset = noffset;
 838         }
 839
 840         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 841                 ieee80211_add_vht_ie(sdata, skb, sband,
 842                                      &assoc_data->ap_vht_cap);
 843
 844         /* if present, add any custom non-vendor IEs that go after HT */
 845         if (assoc_data->ie_len) {
 846                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 847                                                     assoc_data->ie_len,
 848                                                     offset);
 849                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 850                 offset = noffset;
 851         }
 852
 853         if (assoc_data->wmm) {
 854                 if (assoc_data->uapsd) {
 855                         qos_info = ifmgd->uapsd_queues;
 856                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 857                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 858                 } else {
 859                         qos_info = 0;
 860                 }
 861
 862                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 863         }
 864
 865         /* add any remaining custom (i.e. vendor specific here) IEs */
 866         if (assoc_data->ie_len) {
 867                 noffset = assoc_data->ie_len;
 868                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 869         }
 870
 871         if (assoc_data->fils_kek_len &&
 872             fils_encrypt_assoc_req(skb, assoc_data) < 0) {
 873                 dev_kfree_skb(skb);
 874                 return;
 875         }
 876
 877         drv_mgd_prepare_tx(local, sdata);
 878
 879         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 880         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 881                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 882                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 883         ieee80211_tx_skb(sdata, skb);
 884 }
 885
 886 void ieee80211_send_pspoll(struct ieee80211_local *local,
 887                            struct ieee80211_sub_if_data *sdata)
 888 {
 889         struct ieee80211_pspoll *pspoll;
 890         struct sk_buff *skb;
 891
 892         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 893         if (!skb)
 894                 return;
 895
 896         pspoll = (struct ieee80211_pspoll *) skb->data;
 897         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 898
 899         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 900         ieee80211_tx_skb(sdata, skb);
 901 }
 902
 903 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 904                              struct ieee80211_sub_if_data *sdata,
 905                              bool powersave)
 906 {
 907         struct sk_buff *skb;
 908         struct ieee80211_hdr_3addr *nullfunc;
 909         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 910
 911         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 912         if (!skb)
 913                 return;
 914
 915         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 916         if (powersave)
 917                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 918
 919         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 920                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 921
 922         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 923                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 924
 925         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 926                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 927
 928         ieee80211_tx_skb(sdata, skb);
 929 }
 930
 931 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 932                                           struct ieee80211_sub_if_data *sdata)
 933 {
 934         struct sk_buff *skb;
 935         struct ieee80211_hdr *nullfunc;
 936         __le16 fc;
 937
 938         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 939                 return;
 940
 941         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 942         if (!skb)
 943                 return;
 944
 945         skb_reserve(skb, local->hw.extra_tx_headroom);
 946
 947         nullfunc = skb_put_zero(skb, 30);
 948         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 949                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 950         nullfunc->frame_control = fc;
 951         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 952         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 953         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 954         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 955
 956         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 957         ieee80211_tx_skb(sdata, skb);
 958 }
 959
 960 /* spectrum management related things */
 961 static void ieee80211_chswitch_work(struct work_struct *work)
 962 {
 963         struct ieee80211_sub_if_data *sdata =
 964                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 965         struct ieee80211_local *local = sdata->local;
 966         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 967         int ret;
 968
 969         if (!ieee80211_sdata_running(sdata))
 970                 return;
 971
 972         sdata_lock(sdata);
 973         mutex_lock(&local->mtx);
 974         mutex_lock(&local->chanctx_mtx);
 975
 976         if (!ifmgd->associated)
 977                 goto out;
 978
 979         if (!sdata->vif.csa_active)
 980                 goto out;
 981
 982         /*
 983          * using reservation isn't immediate as it may be deferred until later
 984          * with multi-vif. once reservation is complete it will re-schedule the
 985          * work with no reserved_chanctx so verify chandef to check if it
 986          * completed successfully
 987          */
 988
 989         if (sdata->reserved_chanctx) {
 990                 /*
 991                  * with multi-vif csa driver may call ieee80211_csa_finish()
 992                  * many times while waiting for other interfaces to use their
 993                  * reservations
 994                  */
 995                 if (sdata->reserved_ready)
 996                         goto out;
 997
 998                 ret = ieee80211_vif_use_reserved_context(sdata);
 999                 if (ret) {
1000                         sdata_info(sdata,
1001                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1002                                    ret);
1003                         ieee80211_queue_work(&sdata->local->hw,
1004                                              &ifmgd->csa_connection_drop_work);
1005                         goto out;
1006                 }
1007
1008                 goto out;
1009         }
1010
1011         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1012                                         &sdata->csa_chandef)) {
1013                 sdata_info(sdata,
1014                            "failed to finalize channel switch, disconnecting\n");
1015                 ieee80211_queue_work(&sdata->local->hw,
1016                                      &ifmgd->csa_connection_drop_work);
1017                 goto out;
1018         }
1019
1020         /* XXX: shouldn't really modify cfg80211-owned data! */
1021         ifmgd->associated->channel = sdata->csa_chandef.chan;
1022
1023         ifmgd->csa_waiting_bcn = true;
1024
1025         ieee80211_sta_reset_beacon_monitor(sdata);
1026         ieee80211_sta_reset_conn_monitor(sdata);
1027
1028 out:
1029         mutex_unlock(&local->chanctx_mtx);
1030         mutex_unlock(&local->mtx);
1031         sdata_unlock(sdata);
1032 }
1033
1034 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1035 {
1036         struct ieee80211_local *local = sdata->local;
1037         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1038         int ret;
1039
1040         sdata_assert_lock(sdata);
1041
1042         WARN_ON(!sdata->vif.csa_active);
1043
1044         if (sdata->csa_block_tx) {
1045                 ieee80211_wake_vif_queues(local, sdata,
1046                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1047                 sdata->csa_block_tx = false;
1048         }
1049
1050         sdata->vif.csa_active = false;
1051         ifmgd->csa_waiting_bcn = false;
1052
1053         ret = drv_post_channel_switch(sdata);
1054         if (ret) {
1055                 sdata_info(sdata,
1056                            "driver post channel switch failed, disconnecting\n");
1057                 ieee80211_queue_work(&local->hw,
1058                                      &ifmgd->csa_connection_drop_work);
1059                 return;
1060         }
1061
1062         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1063 }
1064
1065 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1066 {
1067         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1068         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1069
1070         trace_api_chswitch_done(sdata, success);
1071         if (!success) {
1072                 sdata_info(sdata,
1073                            "driver channel switch failed, disconnecting\n");
1074                 ieee80211_queue_work(&sdata->local->hw,
1075                                      &ifmgd->csa_connection_drop_work);
1076         } else {
1077                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1078         }
1079 }
1080 EXPORT_SYMBOL(ieee80211_chswitch_done);
1081
1082 static void ieee80211_chswitch_timer(unsigned long data)
1083 {
1084         struct ieee80211_sub_if_data *sdata =
1085                 (struct ieee80211_sub_if_data *) data;
1086
1087         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1088 }
1089
1090 static void
1091 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1092                                  u64 timestamp, u32 device_timestamp,
1093                                  struct ieee802_11_elems *elems,
1094                                  bool beacon)
1095 {
1096         struct ieee80211_local *local = sdata->local;
1097         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1098         struct cfg80211_bss *cbss = ifmgd->associated;
1099         struct ieee80211_chanctx_conf *conf;
1100         struct ieee80211_chanctx *chanctx;
1101         enum nl80211_band current_band;
1102         struct ieee80211_csa_ie csa_ie;
1103         struct ieee80211_channel_switch ch_switch;
1104         int res;
1105
1106         sdata_assert_lock(sdata);
1107
1108         if (!cbss)
1109                 return;
1110
1111         if (local->scanning)
1112                 return;
1113
1114         /* disregard subsequent announcements if we are already processing */
1115         if (sdata->vif.csa_active)
1116                 return;
1117
1118         current_band = cbss->channel->band;
1119         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1120                                            ifmgd->flags,
1121                                            ifmgd->associated->bssid, &csa_ie);
1122         if (res < 0)
1123                 ieee80211_queue_work(&local->hw,
1124                                      &ifmgd->csa_connection_drop_work);
1125         if (res)
1126                 return;
1127
1128         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1129                                      IEEE80211_CHAN_DISABLED)) {
1130                 sdata_info(sdata,
1131                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1132                            ifmgd->associated->bssid,
1133                            csa_ie.chandef.chan->center_freq,
1134                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1135                            csa_ie.chandef.center_freq2);
1136                 ieee80211_queue_work(&local->hw,
1137                                      &ifmgd->csa_connection_drop_work);
1138                 return;
1139         }
1140
1141         if (cfg80211_chandef_identical(&csa_ie.chandef,
1142                                        &sdata->vif.bss_conf.chandef)) {
1143                 if (ifmgd->csa_ignored_same_chan)
1144                         return;
1145                 sdata_info(sdata,
1146                            "AP %pM tries to chanswitch to same channel, ignore\n",
1147                            ifmgd->associated->bssid);
1148                 ifmgd->csa_ignored_same_chan = true;
1149                 return;
1150         }
1151
1152         /*
1153          * Drop all TDLS peers - either we disconnect or move to a different
1154          * channel from this point on. There's no telling what our peer will do.
1155          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1156          * have an incompatible wider chandef.
1157          */
1158         ieee80211_teardown_tdls_peers(sdata);
1159
1160         mutex_lock(&local->mtx);
1161         mutex_lock(&local->chanctx_mtx);
1162         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1163                                          lockdep_is_held(&local->chanctx_mtx));
1164         if (!conf) {
1165                 sdata_info(sdata,
1166                            "no channel context assigned to vif?, disconnecting\n");
1167                 goto drop_connection;
1168         }
1169
1170         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1171
1172         if (local->use_chanctx &&
1173             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1174                 sdata_info(sdata,
1175                            "driver doesn't support chan-switch with channel contexts\n");
1176                 goto drop_connection;
1177         }
1178
1179         ch_switch.timestamp = timestamp;
1180         ch_switch.device_timestamp = device_timestamp;
1181         ch_switch.block_tx = csa_ie.mode;
1182         ch_switch.chandef = csa_ie.chandef;
1183         ch_switch.count = csa_ie.count;
1184
1185         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1186                 sdata_info(sdata,
1187                            "preparing for channel switch failed, disconnecting\n");
1188                 goto drop_connection;
1189         }
1190
1191         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1192                                             chanctx->mode, false);
1193         if (res) {
1194                 sdata_info(sdata,
1195                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1196                            res);
1197                 goto drop_connection;
1198         }
1199         mutex_unlock(&local->chanctx_mtx);
1200
1201         sdata->vif.csa_active = true;
1202         sdata->csa_chandef = csa_ie.chandef;
1203         sdata->csa_block_tx = csa_ie.mode;
1204         ifmgd->csa_ignored_same_chan = false;
1205
1206         if (sdata->csa_block_tx)
1207                 ieee80211_stop_vif_queues(local, sdata,
1208                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1209         mutex_unlock(&local->mtx);
1210
1211         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1212                                           csa_ie.count);
1213
1214         if (local->ops->channel_switch) {
1215                 /* use driver's channel switch callback */
1216                 drv_channel_switch(local, sdata, &ch_switch);
1217                 return;
1218         }
1219
1220         /* channel switch handled in software */
1221         if (csa_ie.count <= 1)
1222                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1223         else
1224                 mod_timer(&ifmgd->chswitch_timer,
1225                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1226                                          cbss->beacon_interval));
1227         return;
1228  drop_connection:
1229         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1230         mutex_unlock(&local->chanctx_mtx);
1231         mutex_unlock(&local->mtx);
1232 }
1233
1234 static bool
1235 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1236                                  struct ieee80211_channel *channel,
1237                                  const u8 *country_ie, u8 country_ie_len,
1238                                  const u8 *pwr_constr_elem,
1239                                  int *chan_pwr, int *pwr_reduction)
1240 {
1241         struct ieee80211_country_ie_triplet *triplet;
1242         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1243         int i, chan_increment;
1244         bool have_chan_pwr = false;
1245
1246         /* Invalid IE */
1247         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1248                 return false;
1249
1250         triplet = (void *)(country_ie + 3);
1251         country_ie_len -= 3;
1252
1253         switch (channel->band) {
1254         default:
1255                 WARN_ON_ONCE(1);
1256                 /* fall through */
1257         case NL80211_BAND_2GHZ:
1258         case NL80211_BAND_60GHZ:
1259                 chan_increment = 1;
1260                 break;
1261         case NL80211_BAND_5GHZ:
1262                 chan_increment = 4;
1263                 break;
1264         }
1265
1266         /* find channel */
1267         while (country_ie_len >= 3) {
1268                 u8 first_channel = triplet->chans.first_channel;
1269
1270                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1271                         goto next;
1272
1273                 for (i = 0; i < triplet->chans.num_channels; i++) {
1274                         if (first_channel + i * chan_increment == chan) {
1275                                 have_chan_pwr = true;
1276                                 *chan_pwr = triplet->chans.max_power;
1277                                 break;
1278                         }
1279                 }
1280                 if (have_chan_pwr)
1281                         break;
1282
1283  next:
1284                 triplet++;
1285                 country_ie_len -= 3;
1286         }
1287
1288         if (have_chan_pwr && pwr_constr_elem)
1289                 *pwr_reduction = *pwr_constr_elem;
1290         else
1291                 *pwr_reduction = 0;
1292
1293         return have_chan_pwr;
1294 }
1295
1296 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1297                                       struct ieee80211_channel *channel,
1298                                       const u8 *cisco_dtpc_ie,
1299                                       int *pwr_level)
1300 {
1301         /* From practical testing, the first data byte of the DTPC element
1302          * seems to contain the requested dBm level, and the CLI on Cisco
1303          * APs clearly state the range is -127 to 127 dBm, which indicates
1304          * a signed byte, although it seemingly never actually goes negative.
1305          * The other byte seems to always be zero.
1306          */
1307         *pwr_level = (__s8)cisco_dtpc_ie[4];
1308 }
1309
1310 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1311                                        struct ieee80211_channel *channel,
1312                                        struct ieee80211_mgmt *mgmt,
1313                                        const u8 *country_ie, u8 country_ie_len,
1314                                        const u8 *pwr_constr_ie,
1315                                        const u8 *cisco_dtpc_ie)
1316 {
1317         bool has_80211h_pwr = false, has_cisco_pwr = false;
1318         int chan_pwr = 0, pwr_reduction_80211h = 0;
1319         int pwr_level_cisco, pwr_level_80211h;
1320         int new_ap_level;
1321         __le16 capab = mgmt->u.probe_resp.capab_info;
1322
1323         if (country_ie &&
1324             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1325              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1326                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1327                         sdata, channel, country_ie, country_ie_len,
1328                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1329                 pwr_level_80211h =
1330                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1331         }
1332
1333         if (cisco_dtpc_ie) {
1334                 ieee80211_find_cisco_dtpc(
1335                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1336                 has_cisco_pwr = true;
1337         }
1338
1339         if (!has_80211h_pwr && !has_cisco_pwr)
1340                 return 0;
1341
1342         /* If we have both 802.11h and Cisco DTPC, apply both limits
1343          * by picking the smallest of the two power levels advertised.
1344          */
1345         if (has_80211h_pwr &&
1346             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1347                 new_ap_level = pwr_level_80211h;
1348
1349                 if (sdata->ap_power_level == new_ap_level)
1350                         return 0;
1351
1352                 sdata_dbg(sdata,
1353                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1354                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1355                           sdata->u.mgd.bssid);
1356         } else {  /* has_cisco_pwr is always true here. */
1357                 new_ap_level = pwr_level_cisco;
1358
1359                 if (sdata->ap_power_level == new_ap_level)
1360                         return 0;
1361
1362                 sdata_dbg(sdata,
1363                           "Limiting TX power to %d dBm as advertised by %pM\n",
1364                           pwr_level_cisco, sdata->u.mgd.bssid);
1365         }
1366
1367         sdata->ap_power_level = new_ap_level;
1368         if (__ieee80211_recalc_txpower(sdata))
1369                 return BSS_CHANGED_TXPOWER;
1370         return 0;
1371 }
1372
1373 /* powersave */
1374 static void ieee80211_enable_ps(struct ieee80211_local *local,
1375                                 struct ieee80211_sub_if_data *sdata)
1376 {
1377         struct ieee80211_conf *conf = &local->hw.conf;
1378
1379         /*
1380          * If we are scanning right now then the parameters will
1381          * take effect when scan finishes.
1382          */
1383         if (local->scanning)
1384                 return;
1385
1386         if (conf->dynamic_ps_timeout > 0 &&
1387             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1388                 mod_timer(&local->dynamic_ps_timer, jiffies +
1389                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1390         } else {
1391                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1392                         ieee80211_send_nullfunc(local, sdata, true);
1393
1394                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1395                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1396                         return;
1397
1398                 conf->flags |= IEEE80211_CONF_PS;
1399                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1400         }
1401 }
1402
1403 static void ieee80211_change_ps(struct ieee80211_local *local)
1404 {
1405         struct ieee80211_conf *conf = &local->hw.conf;
1406
1407         if (local->ps_sdata) {
1408                 ieee80211_enable_ps(local, local->ps_sdata);
1409         } else if (conf->flags & IEEE80211_CONF_PS) {
1410                 conf->flags &= ~IEEE80211_CONF_PS;
1411                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1412                 del_timer_sync(&local->dynamic_ps_timer);
1413                 cancel_work_sync(&local->dynamic_ps_enable_work);
1414         }
1415 }
1416
1417 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1418 {
1419         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1420         struct sta_info *sta = NULL;
1421         bool authorized = false;
1422
1423         if (!mgd->powersave)
1424                 return false;
1425
1426         if (mgd->broken_ap)
1427                 return false;
1428
1429         if (!mgd->associated)
1430                 return false;
1431
1432         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1433                 return false;
1434
1435         if (!mgd->have_beacon)
1436                 return false;
1437
1438         rcu_read_lock();
1439         sta = sta_info_get(sdata, mgd->bssid);
1440         if (sta)
1441                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1442         rcu_read_unlock();
1443
1444         return authorized;
1445 }
1446
1447 /* need to hold RTNL or interface lock */
1448 void ieee80211_recalc_ps(struct ieee80211_local *local)
1449 {
1450         struct ieee80211_sub_if_data *sdata, *found = NULL;
1451         int count = 0;
1452         int timeout;
1453
1454         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1455                 local->ps_sdata = NULL;
1456                 return;
1457         }
1458
1459         list_for_each_entry(sdata, &local->interfaces, list) {
1460                 if (!ieee80211_sdata_running(sdata))
1461                         continue;
1462                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1463                         /* If an AP vif is found, then disable PS
1464                          * by setting the count to zero thereby setting
1465                          * ps_sdata to NULL.
1466                          */
1467                         count = 0;
1468                         break;
1469                 }
1470                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1471                         continue;
1472                 found = sdata;
1473                 count++;
1474         }
1475
1476         if (count == 1 && ieee80211_powersave_allowed(found)) {
1477                 u8 dtimper = found->u.mgd.dtim_period;
1478
1479                 timeout = local->dynamic_ps_forced_timeout;
1480                 if (timeout < 0)
1481                         timeout = 100;
1482                 local->hw.conf.dynamic_ps_timeout = timeout;
1483
1484                 /* If the TIM IE is invalid, pretend the value is 1 */
1485                 if (!dtimper)
1486                         dtimper = 1;
1487
1488                 local->hw.conf.ps_dtim_period = dtimper;
1489                 local->ps_sdata = found;
1490         } else {
1491                 local->ps_sdata = NULL;
1492         }
1493
1494         ieee80211_change_ps(local);
1495 }
1496
1497 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1498 {
1499         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1500
1501         if (sdata->vif.bss_conf.ps != ps_allowed) {
1502                 sdata->vif.bss_conf.ps = ps_allowed;
1503                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1504         }
1505 }
1506
1507 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1508 {
1509         struct ieee80211_local *local =
1510                 container_of(work, struct ieee80211_local,
1511                              dynamic_ps_disable_work);
1512
1513         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1514                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1515                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1516         }
1517
1518         ieee80211_wake_queues_by_reason(&local->hw,
1519                                         IEEE80211_MAX_QUEUE_MAP,
1520                                         IEEE80211_QUEUE_STOP_REASON_PS,
1521                                         false);
1522 }
1523
1524 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1525 {
1526         struct ieee80211_local *local =
1527                 container_of(work, struct ieee80211_local,
1528                              dynamic_ps_enable_work);
1529         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1530         struct ieee80211_if_managed *ifmgd;
1531         unsigned long flags;
1532         int q;
1533
1534         /* can only happen when PS was just disabled anyway */
1535         if (!sdata)
1536                 return;
1537
1538         ifmgd = &sdata->u.mgd;
1539
1540         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1541                 return;
1542
1543         if (local->hw.conf.dynamic_ps_timeout > 0) {
1544                 /* don't enter PS if TX frames are pending */
1545                 if (drv_tx_frames_pending(local)) {
1546                         mod_timer(&local->dynamic_ps_timer, jiffies +
1547                                   msecs_to_jiffies(
1548                                   local->hw.conf.dynamic_ps_timeout));
1549                         return;
1550                 }
1551
1552                 /*
1553                  * transmission can be stopped by others which leads to
1554                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1555                  * is not the actual idle state.
1556                  */
1557                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1558                 for (q = 0; q < local->hw.queues; q++) {
1559                         if (local->queue_stop_reasons[q]) {
1560                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1561                                                        flags);
1562                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1563                                           msecs_to_jiffies(
1564                                           local->hw.conf.dynamic_ps_timeout));
1565                                 return;
1566                         }
1567                 }
1568                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1569         }
1570
1571         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1572             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1573                 if (drv_tx_frames_pending(local)) {
1574                         mod_timer(&local->dynamic_ps_timer, jiffies +
1575                                   msecs_to_jiffies(
1576                                   local->hw.conf.dynamic_ps_timeout));
1577                 } else {
1578                         ieee80211_send_nullfunc(local, sdata, true);
1579                         /* Flush to get the tx status of nullfunc frame */
1580                         ieee80211_flush_queues(local, sdata, false);
1581                 }
1582         }
1583
1584         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1585               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1586             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1587                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1588                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1589                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1590         }
1591 }
1592
1593 void ieee80211_dynamic_ps_timer(unsigned long data)
1594 {
1595         struct ieee80211_local *local = (void *) data;
1596
1597         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1598 }
1599
1600 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1601 {
1602         struct delayed_work *delayed_work = to_delayed_work(work);
1603         struct ieee80211_sub_if_data *sdata =
1604                 container_of(delayed_work, struct ieee80211_sub_if_data,
1605                              dfs_cac_timer_work);
1606         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1607
1608         mutex_lock(&sdata->local->mtx);
1609         if (sdata->wdev.cac_started) {
1610                 ieee80211_vif_release_channel(sdata);
1611                 cfg80211_cac_event(sdata->dev, &chandef,
1612                                    NL80211_RADAR_CAC_FINISHED,
1613                                    GFP_KERNEL);
1614         }
1615         mutex_unlock(&sdata->local->mtx);
1616 }
1617
1618 static bool
1619 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1620 {
1621         struct ieee80211_local *local = sdata->local;
1622         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1623         bool ret = false;
1624         int ac;
1625
1626         if (local->hw.queues < IEEE80211_NUM_ACS)
1627                 return false;
1628
1629         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1630                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1631                 int non_acm_ac;
1632                 unsigned long now = jiffies;
1633
1634                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1635                     tx_tspec->admitted_time &&
1636                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1637                         tx_tspec->consumed_tx_time = 0;
1638                         tx_tspec->time_slice_start = now;
1639
1640                         if (tx_tspec->downgraded)
1641                                 tx_tspec->action =
1642                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1643                 }
1644
1645                 switch (tx_tspec->action) {
1646                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1647                         /* take the original parameters */
1648                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1649                                 sdata_err(sdata,
1650                                           "failed to set TX queue parameters for queue %d\n",
1651                                           ac);
1652                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1653                         tx_tspec->downgraded = false;
1654                         ret = true;
1655                         break;
1656                 case TX_TSPEC_ACTION_DOWNGRADE:
1657                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1658                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1659                                 ret = true;
1660                                 break;
1661                         }
1662                         /* downgrade next lower non-ACM AC */
1663                         for (non_acm_ac = ac + 1;
1664                              non_acm_ac < IEEE80211_NUM_ACS;
1665                              non_acm_ac++)
1666                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1667                                         break;
1668                         /* Usually the loop will result in using BK even if it
1669                          * requires admission control, but such a configuration
1670                          * makes no sense and we have to transmit somehow - the
1671                          * AC selection does the same thing.
1672                          * If we started out trying to downgrade from BK, then
1673                          * the extra condition here might be needed.
1674                          */
1675                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1676                                 non_acm_ac = IEEE80211_AC_BK;
1677                         if (drv_conf_tx(local, sdata, ac,
1678                                         &sdata->tx_conf[non_acm_ac]))
1679                                 sdata_err(sdata,
1680                                           "failed to set TX queue parameters for queue %d\n",
1681                                           ac);
1682                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1683                         ret = true;
1684                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1685                                 tx_tspec->time_slice_start + HZ - now + 1);
1686                         break;
1687                 case TX_TSPEC_ACTION_NONE:
1688                         /* nothing now */
1689                         break;
1690                 }
1691         }
1692
1693         return ret;
1694 }
1695
1696 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1697 {
1698         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1699                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1700 }
1701
1702 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1703 {
1704         struct ieee80211_sub_if_data *sdata;
1705
1706         sdata = container_of(work, struct ieee80211_sub_if_data,
1707                              u.mgd.tx_tspec_wk.work);
1708         ieee80211_sta_handle_tspec_ac_params(sdata);
1709 }
1710
1711 /* MLME */
1712 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1713                                      struct ieee80211_sub_if_data *sdata,
1714                                      const u8 *wmm_param, size_t wmm_param_len)
1715 {
1716         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1717         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1718         size_t left;
1719         int count, ac;
1720         const u8 *pos;
1721         u8 uapsd_queues = 0;
1722
1723         if (!local->ops->conf_tx)
1724                 return false;
1725
1726         if (local->hw.queues < IEEE80211_NUM_ACS)
1727                 return false;
1728
1729         if (!wmm_param)
1730                 return false;
1731
1732         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1733                 return false;
1734
1735         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1736                 uapsd_queues = ifmgd->uapsd_queues;
1737
1738         count = wmm_param[6] & 0x0f;
1739         if (count == ifmgd->wmm_last_param_set)
1740                 return false;
1741         ifmgd->wmm_last_param_set = count;
1742
1743         pos = wmm_param + 8;
1744         left = wmm_param_len - 8;
1745
1746         memset(&params, 0, sizeof(params));
1747
1748         sdata->wmm_acm = 0;
1749         for (; left >= 4; left -= 4, pos += 4) {
1750                 int aci = (pos[0] >> 5) & 0x03;
1751                 int acm = (pos[0] >> 4) & 0x01;
1752                 bool uapsd = false;
1753
1754                 switch (aci) {
1755                 case 1: /* AC_BK */
1756                         ac = IEEE80211_AC_BK;
1757                         if (acm)
1758                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1759                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1760                                 uapsd = true;
1761                         break;
1762                 case 2: /* AC_VI */
1763                         ac = IEEE80211_AC_VI;
1764                         if (acm)
1765                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1766                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1767                                 uapsd = true;
1768                         break;
1769                 case 3: /* AC_VO */
1770                         ac = IEEE80211_AC_VO;
1771                         if (acm)
1772                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1773                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1774                                 uapsd = true;
1775                         break;
1776                 case 0: /* AC_BE */
1777                 default:
1778                         ac = IEEE80211_AC_BE;
1779                         if (acm)
1780                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1781                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1782                                 uapsd = true;
1783                         break;
1784                 }
1785
1786                 params[ac].aifs = pos[0] & 0x0f;
1787
1788                 if (params[ac].aifs < 2) {
1789                         sdata_info(sdata,
1790                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1791                                    params[ac].aifs, aci);
1792                         params[ac].aifs = 2;
1793                 }
1794                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1795                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1796                 params[ac].txop = get_unaligned_le16(pos + 2);
1797                 params[ac].acm = acm;
1798                 params[ac].uapsd = uapsd;
1799
1800                 if (params[ac].cw_min > params[ac].cw_max) {
1801                         sdata_info(sdata,
1802                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1803                                    params[ac].cw_min, params[ac].cw_max, aci);
1804                         return false;
1805                 }
1806         }
1807
1808         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1809                 mlme_dbg(sdata,
1810                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1811                          ac, params[ac].acm,
1812                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1813                          params[ac].txop, params[ac].uapsd,
1814                          ifmgd->tx_tspec[ac].downgraded);
1815                 sdata->tx_conf[ac] = params[ac];
1816                 if (!ifmgd->tx_tspec[ac].downgraded &&
1817                     drv_conf_tx(local, sdata, ac, &params[ac]))
1818                         sdata_err(sdata,
1819                                   "failed to set TX queue parameters for AC %d\n",
1820                                   ac);
1821         }
1822
1823         /* enable WMM or activate new settings */
1824         sdata->vif.bss_conf.qos = true;
1825         return true;
1826 }
1827
1828 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1829 {
1830         lockdep_assert_held(&sdata->local->mtx);
1831
1832         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1833         ieee80211_run_deferred_scan(sdata->local);
1834 }
1835
1836 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1837 {
1838         mutex_lock(&sdata->local->mtx);
1839         __ieee80211_stop_poll(sdata);
1840         mutex_unlock(&sdata->local->mtx);
1841 }
1842
1843 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1844                                            u16 capab, bool erp_valid, u8 erp)
1845 {
1846         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1847         struct ieee80211_supported_band *sband;
1848         u32 changed = 0;
1849         bool use_protection;
1850         bool use_short_preamble;
1851         bool use_short_slot;
1852
1853         sband = ieee80211_get_sband(sdata);
1854         if (!sband)
1855                 return changed;
1856
1857         if (erp_valid) {
1858                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1859                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1860         } else {
1861                 use_protection = false;
1862                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1863         }
1864
1865         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1866         if (sband->band == NL80211_BAND_5GHZ)
1867                 use_short_slot = true;
1868
1869         if (use_protection != bss_conf->use_cts_prot) {
1870                 bss_conf->use_cts_prot = use_protection;
1871                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1872         }
1873
1874         if (use_short_preamble != bss_conf->use_short_preamble) {
1875                 bss_conf->use_short_preamble = use_short_preamble;
1876                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1877         }
1878
1879         if (use_short_slot != bss_conf->use_short_slot) {
1880                 bss_conf->use_short_slot = use_short_slot;
1881                 changed |= BSS_CHANGED_ERP_SLOT;
1882         }
1883
1884         return changed;
1885 }
1886
1887 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1888                                      struct cfg80211_bss *cbss,
1889                                      u32 bss_info_changed)
1890 {
1891         struct ieee80211_bss *bss = (void *)cbss->priv;
1892         struct ieee80211_local *local = sdata->local;
1893         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1894
1895         bss_info_changed |= BSS_CHANGED_ASSOC;
1896         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1897                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1898
1899         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1900                 beacon_loss_count * bss_conf->beacon_int));
1901
1902         sdata->u.mgd.associated = cbss;
1903         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1904
1905         ieee80211_check_rate_mask(sdata);
1906
1907         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1908
1909         if (sdata->vif.p2p ||
1910             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1911                 const struct cfg80211_bss_ies *ies;
1912
1913                 rcu_read_lock();
1914                 ies = rcu_dereference(cbss->ies);
1915                 if (ies) {
1916                         int ret;
1917
1918                         ret = cfg80211_get_p2p_attr(
1919                                         ies->data, ies->len,
1920                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1921                                         (u8 *) &bss_conf->p2p_noa_attr,
1922                                         sizeof(bss_conf->p2p_noa_attr));
1923                         if (ret >= 2) {
1924                                 sdata->u.mgd.p2p_noa_index =
1925                                         bss_conf->p2p_noa_attr.index;
1926                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1927                         }
1928                 }
1929                 rcu_read_unlock();
1930         }
1931
1932         /* just to be sure */
1933         ieee80211_stop_poll(sdata);
1934
1935         ieee80211_led_assoc(local, 1);
1936
1937         if (sdata->u.mgd.have_beacon) {
1938                 /*
1939                  * If the AP is buggy we may get here with no DTIM period
1940                  * known, so assume it's 1 which is the only safe assumption
1941                  * in that case, although if the TIM IE is broken powersave
1942                  * probably just won't work at all.
1943                  */
1944                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1945                 bss_conf->beacon_rate = bss->beacon_rate;
1946                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1947         } else {
1948                 bss_conf->beacon_rate = NULL;
1949                 bss_conf->dtim_period = 0;
1950         }
1951
1952         bss_conf->assoc = 1;
1953
1954         /* Tell the driver to monitor connection quality (if supported) */
1955         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1956             bss_conf->cqm_rssi_thold)
1957                 bss_info_changed |= BSS_CHANGED_CQM;
1958
1959         /* Enable ARP filtering */
1960         if (bss_conf->arp_addr_cnt)
1961                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1962
1963         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1964
1965         mutex_lock(&local->iflist_mtx);
1966         ieee80211_recalc_ps(local);
1967         mutex_unlock(&local->iflist_mtx);
1968
1969         ieee80211_recalc_smps(sdata);
1970         ieee80211_recalc_ps_vif(sdata);
1971
1972         netif_carrier_on(sdata->dev);
1973 }
1974
1975 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1976                                    u16 stype, u16 reason, bool tx,
1977                                    u8 *frame_buf)
1978 {
1979         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1980         struct ieee80211_local *local = sdata->local;
1981         u32 changed = 0;
1982
1983         sdata_assert_lock(sdata);
1984
1985         if (WARN_ON_ONCE(tx && !frame_buf))
1986                 return;
1987
1988         if (WARN_ON(!ifmgd->associated))
1989                 return;
1990
1991         ieee80211_stop_poll(sdata);
1992
1993         ifmgd->associated = NULL;
1994         netif_carrier_off(sdata->dev);
1995
1996         /*
1997          * if we want to get out of ps before disassoc (why?) we have
1998          * to do it before sending disassoc, as otherwise the null-packet
1999          * won't be valid.
2000          */
2001         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2002                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2003                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2004         }
2005         local->ps_sdata = NULL;
2006
2007         /* disable per-vif ps */
2008         ieee80211_recalc_ps_vif(sdata);
2009
2010         /* make sure ongoing transmission finishes */
2011         synchronize_net();
2012
2013         /*
2014          * drop any frame before deauth/disassoc, this can be data or
2015          * management frame. Since we are disconnecting, we should not
2016          * insist sending these frames which can take time and delay
2017          * the disconnection and possible the roaming.
2018          */
2019         if (tx)
2020                 ieee80211_flush_queues(local, sdata, true);
2021
2022         /* deauthenticate/disassociate now */
2023         if (tx || frame_buf)
2024                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2025                                                reason, tx, frame_buf);
2026
2027         /* flush out frame - make sure the deauth was actually sent */
2028         if (tx)
2029                 ieee80211_flush_queues(local, sdata, false);
2030
2031         /* clear bssid only after building the needed mgmt frames */
2032         eth_zero_addr(ifmgd->bssid);
2033
2034         /* remove AP and TDLS peers */
2035         sta_info_flush(sdata);
2036
2037         /* finally reset all BSS / config parameters */
2038         changed |= ieee80211_reset_erp_info(sdata);
2039
2040         ieee80211_led_assoc(local, 0);
2041         changed |= BSS_CHANGED_ASSOC;
2042         sdata->vif.bss_conf.assoc = false;
2043
2044         ifmgd->p2p_noa_index = -1;
2045         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2046                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2047
2048         /* on the next assoc, re-program HT/VHT parameters */
2049         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2050         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2051         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2052         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2053
2054         /* reset MU-MIMO ownership and group data */
2055         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2056                sizeof(sdata->vif.bss_conf.mu_group.membership));
2057         memset(sdata->vif.bss_conf.mu_group.position, 0,
2058                sizeof(sdata->vif.bss_conf.mu_group.position));
2059         changed |= BSS_CHANGED_MU_GROUPS;
2060         sdata->vif.mu_mimo_owner = false;
2061
2062         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2063
2064         del_timer_sync(&local->dynamic_ps_timer);
2065         cancel_work_sync(&local->dynamic_ps_enable_work);
2066
2067         /* Disable ARP filtering */
2068         if (sdata->vif.bss_conf.arp_addr_cnt)
2069                 changed |= BSS_CHANGED_ARP_FILTER;
2070
2071         sdata->vif.bss_conf.qos = false;
2072         changed |= BSS_CHANGED_QOS;
2073
2074         /* The BSSID (not really interesting) and HT changed */
2075         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2076         ieee80211_bss_info_change_notify(sdata, changed);
2077
2078         /* disassociated - set to defaults now */
2079         ieee80211_set_wmm_default(sdata, false, false);
2080
2081         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2082         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2083         del_timer_sync(&sdata->u.mgd.timer);
2084         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2085
2086         sdata->vif.bss_conf.dtim_period = 0;
2087         sdata->vif.bss_conf.beacon_rate = NULL;
2088
2089         ifmgd->have_beacon = false;
2090
2091         ifmgd->flags = 0;
2092         mutex_lock(&local->mtx);
2093         ieee80211_vif_release_channel(sdata);
2094
2095         sdata->vif.csa_active = false;
2096         ifmgd->csa_waiting_bcn = false;
2097         ifmgd->csa_ignored_same_chan = false;
2098         if (sdata->csa_block_tx) {
2099                 ieee80211_wake_vif_queues(local, sdata,
2100                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2101                 sdata->csa_block_tx = false;
2102         }
2103         mutex_unlock(&local->mtx);
2104
2105         /* existing TX TSPEC sessions no longer exist */
2106         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2107         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2108
2109         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2110 }
2111
2112 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2113                              struct ieee80211_hdr *hdr)
2114 {
2115         /*
2116          * We can postpone the mgd.timer whenever receiving unicast frames
2117          * from AP because we know that the connection is working both ways
2118          * at that time. But multicast frames (and hence also beacons) must
2119          * be ignored here, because we need to trigger the timer during
2120          * data idle periods for sending the periodic probe request to the
2121          * AP we're connected to.
2122          */
2123         if (is_multicast_ether_addr(hdr->addr1))
2124                 return;
2125
2126         ieee80211_sta_reset_conn_monitor(sdata);
2127 }
2128
2129 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2130 {
2131         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2132         struct ieee80211_local *local = sdata->local;
2133
2134         mutex_lock(&local->mtx);
2135         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2136                 goto out;
2137
2138         __ieee80211_stop_poll(sdata);
2139
2140         mutex_lock(&local->iflist_mtx);
2141         ieee80211_recalc_ps(local);
2142         mutex_unlock(&local->iflist_mtx);
2143
2144         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2145                 goto out;
2146
2147         /*
2148          * We've received a probe response, but are not sure whether
2149          * we have or will be receiving any beacons or data, so let's
2150          * schedule the timers again, just in case.
2151          */
2152         ieee80211_sta_reset_beacon_monitor(sdata);
2153
2154         mod_timer(&ifmgd->conn_mon_timer,
2155                   round_jiffies_up(jiffies +
2156                                    IEEE80211_CONNECTION_IDLE_TIME));
2157 out:
2158         mutex_unlock(&local->mtx);
2159 }
2160
2161 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2162                                            struct ieee80211_hdr *hdr,
2163                                            u16 tx_time)
2164 {
2165         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2166         u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2167         int ac = ieee80211_ac_from_tid(tid);
2168         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2169         unsigned long now = jiffies;
2170
2171         if (likely(!tx_tspec->admitted_time))
2172                 return;
2173
2174         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2175                 tx_tspec->consumed_tx_time = 0;
2176                 tx_tspec->time_slice_start = now;
2177
2178                 if (tx_tspec->downgraded) {
2179                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2180                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2181                 }
2182         }
2183
2184         if (tx_tspec->downgraded)
2185                 return;
2186
2187         tx_tspec->consumed_tx_time += tx_time;
2188
2189         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2190                 tx_tspec->downgraded = true;
2191                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2192                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2193         }
2194 }
2195
2196 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2197                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2198 {
2199         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2200
2201         if (!ieee80211_is_data(hdr->frame_control))
2202             return;
2203
2204         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2205             sdata->u.mgd.probe_send_count > 0) {
2206                 if (ack)
2207                         ieee80211_sta_reset_conn_monitor(sdata);
2208                 else
2209                         sdata->u.mgd.nullfunc_failed = true;
2210                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2211                 return;
2212         }
2213
2214         if (ack)
2215                 ieee80211_sta_reset_conn_monitor(sdata);
2216 }
2217
2218 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2219 {
2220         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2221         const u8 *ssid;
2222         u8 *dst = ifmgd->associated->bssid;
2223         u8 unicast_limit = max(1, max_probe_tries - 3);
2224         struct sta_info *sta;
2225
2226         /*
2227          * Try sending broadcast probe requests for the last three
2228          * probe requests after the first ones failed since some
2229          * buggy APs only support broadcast probe requests.
2230          */
2231         if (ifmgd->probe_send_count >= unicast_limit)
2232                 dst = NULL;
2233
2234         /*
2235          * When the hardware reports an accurate Tx ACK status, it's
2236          * better to send a nullfunc frame instead of a probe request,
2237          * as it will kick us off the AP quickly if we aren't associated
2238          * anymore. The timeout will be reset if the frame is ACKed by
2239          * the AP.
2240          */
2241         ifmgd->probe_send_count++;
2242
2243         if (dst) {
2244                 mutex_lock(&sdata->local->sta_mtx);
2245                 sta = sta_info_get(sdata, dst);
2246                 if (!WARN_ON(!sta))
2247                         ieee80211_check_fast_rx(sta);
2248                 mutex_unlock(&sdata->local->sta_mtx);
2249         }
2250
2251         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2252                 ifmgd->nullfunc_failed = false;
2253                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2254         } else {
2255                 int ssid_len;
2256
2257                 rcu_read_lock();
2258                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2259                 if (WARN_ON_ONCE(ssid == NULL))
2260                         ssid_len = 0;
2261                 else
2262                         ssid_len = ssid[1];
2263
2264                 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2265                                          ssid + 2, ssid_len, NULL,
2266                                          0, (u32) -1, true, 0,
2267                                          ifmgd->associated->channel, false);
2268                 rcu_read_unlock();
2269         }
2270
2271         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2272         run_again(sdata, ifmgd->probe_timeout);
2273 }
2274
2275 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2276                                    bool beacon)
2277 {
2278         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2279         bool already = false;
2280
2281         if (!ieee80211_sdata_running(sdata))
2282                 return;
2283
2284         sdata_lock(sdata);
2285
2286         if (!ifmgd->associated)
2287                 goto out;
2288
2289         mutex_lock(&sdata->local->mtx);
2290
2291         if (sdata->local->tmp_channel || sdata->local->scanning) {
2292                 mutex_unlock(&sdata->local->mtx);
2293                 goto out;
2294         }
2295
2296         if (beacon) {
2297                 mlme_dbg_ratelimited(sdata,
2298                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2299                                      beacon_loss_count);
2300
2301                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2302         }
2303
2304         /*
2305          * The driver/our work has already reported this event or the
2306          * connection monitoring has kicked in and we have already sent
2307          * a probe request. Or maybe the AP died and the driver keeps
2308          * reporting until we disassociate...
2309          *
2310          * In either case we have to ignore the current call to this
2311          * function (except for setting the correct probe reason bit)
2312          * because otherwise we would reset the timer every time and
2313          * never check whether we received a probe response!
2314          */
2315         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2316                 already = true;
2317
2318         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2319
2320         mutex_unlock(&sdata->local->mtx);
2321
2322         if (already)
2323                 goto out;
2324
2325         mutex_lock(&sdata->local->iflist_mtx);
2326         ieee80211_recalc_ps(sdata->local);
2327         mutex_unlock(&sdata->local->iflist_mtx);
2328
2329         ifmgd->probe_send_count = 0;
2330         ieee80211_mgd_probe_ap_send(sdata);
2331  out:
2332         sdata_unlock(sdata);
2333 }
2334
2335 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2336                                           struct ieee80211_vif *vif)
2337 {
2338         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2339         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2340         struct cfg80211_bss *cbss;
2341         struct sk_buff *skb;
2342         const u8 *ssid;
2343         int ssid_len;
2344
2345         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2346                 return NULL;
2347
2348         sdata_assert_lock(sdata);
2349
2350         if (ifmgd->associated)
2351                 cbss = ifmgd->associated;
2352         else if (ifmgd->auth_data)
2353                 cbss = ifmgd->auth_data->bss;
2354         else if (ifmgd->assoc_data)
2355                 cbss = ifmgd->assoc_data->bss;
2356         else
2357                 return NULL;
2358
2359         rcu_read_lock();
2360         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2361         if (WARN_ON_ONCE(ssid == NULL))
2362                 ssid_len = 0;
2363         else
2364                 ssid_len = ssid[1];
2365
2366         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2367                                         (u32) -1, cbss->channel,
2368                                         ssid + 2, ssid_len,
2369                                         NULL, 0, true);
2370         rcu_read_unlock();
2371
2372         return skb;
2373 }
2374 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2375
2376 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2377                                         const u8 *buf, size_t len, bool tx,
2378                                         u16 reason)
2379 {
2380         struct ieee80211_event event = {
2381                 .type = MLME_EVENT,
2382                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2383                 .u.mlme.reason = reason,
2384         };
2385
2386         if (tx)
2387                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2388         else
2389                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2390
2391         drv_event_callback(sdata->local, sdata, &event);
2392 }
2393
2394 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2395 {
2396         struct ieee80211_local *local = sdata->local;
2397         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2398         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2399
2400         sdata_lock(sdata);
2401         if (!ifmgd->associated) {
2402                 sdata_unlock(sdata);
2403                 return;
2404         }
2405
2406         /* AP is probably out of range (or not reachable for another reason) so
2407          * remove the bss struct for that AP.
2408          */
2409         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2410
2411         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2412                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2413                                true, frame_buf);
2414         mutex_lock(&local->mtx);
2415         sdata->vif.csa_active = false;
2416         ifmgd->csa_waiting_bcn = false;
2417         if (sdata->csa_block_tx) {
2418                 ieee80211_wake_vif_queues(local, sdata,
2419                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2420                 sdata->csa_block_tx = false;
2421         }
2422         mutex_unlock(&local->mtx);
2423
2424         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2425                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2426
2427         sdata_unlock(sdata);
2428 }
2429
2430 static void ieee80211_beacon_connection_loss_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.beacon_connection_loss_work);
2435         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2436
2437         if (ifmgd->associated)
2438                 ifmgd->beacon_loss_count++;
2439
2440         if (ifmgd->connection_loss) {
2441                 sdata_info(sdata, "Connection to AP %pM lost\n",
2442                            ifmgd->bssid);
2443                 __ieee80211_disconnect(sdata);
2444         } else {
2445                 ieee80211_mgd_probe_ap(sdata, true);
2446         }
2447 }
2448
2449 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2450 {
2451         struct ieee80211_sub_if_data *sdata =
2452                 container_of(work, struct ieee80211_sub_if_data,
2453                              u.mgd.csa_connection_drop_work);
2454
2455         __ieee80211_disconnect(sdata);
2456 }
2457
2458 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2459 {
2460         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2461         struct ieee80211_hw *hw = &sdata->local->hw;
2462
2463         trace_api_beacon_loss(sdata);
2464
2465         sdata->u.mgd.connection_loss = false;
2466         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2467 }
2468 EXPORT_SYMBOL(ieee80211_beacon_loss);
2469
2470 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2471 {
2472         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2473         struct ieee80211_hw *hw = &sdata->local->hw;
2474
2475         trace_api_connection_loss(sdata);
2476
2477         sdata->u.mgd.connection_loss = true;
2478         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2479 }
2480 EXPORT_SYMBOL(ieee80211_connection_loss);
2481
2482
2483 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2484                                         bool assoc)
2485 {
2486         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2487
2488         sdata_assert_lock(sdata);
2489
2490         if (!assoc) {
2491                 /*
2492                  * we are not authenticated yet, the only timer that could be
2493                  * running is the timeout for the authentication response which
2494                  * which is not relevant anymore.
2495                  */
2496                 del_timer_sync(&sdata->u.mgd.timer);
2497                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2498
2499                 eth_zero_addr(sdata->u.mgd.bssid);
2500                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2501                 sdata->u.mgd.flags = 0;
2502                 mutex_lock(&sdata->local->mtx);
2503                 ieee80211_vif_release_channel(sdata);
2504                 mutex_unlock(&sdata->local->mtx);
2505         }
2506
2507         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2508         kfree(auth_data);
2509         sdata->u.mgd.auth_data = NULL;
2510 }
2511
2512 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2513                                          bool assoc, bool abandon)
2514 {
2515         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2516
2517         sdata_assert_lock(sdata);
2518
2519         if (!assoc) {
2520                 /*
2521                  * we are not associated yet, the only timer that could be
2522                  * running is the timeout for the association response which
2523                  * which is not relevant anymore.
2524                  */
2525                 del_timer_sync(&sdata->u.mgd.timer);
2526                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2527
2528                 eth_zero_addr(sdata->u.mgd.bssid);
2529                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2530                 sdata->u.mgd.flags = 0;
2531                 sdata->vif.mu_mimo_owner = false;
2532
2533                 mutex_lock(&sdata->local->mtx);
2534                 ieee80211_vif_release_channel(sdata);
2535                 mutex_unlock(&sdata->local->mtx);
2536
2537                 if (abandon)
2538                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2539         }
2540
2541         kfree(assoc_data);
2542         sdata->u.mgd.assoc_data = NULL;
2543 }
2544
2545 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2546                                      struct ieee80211_mgmt *mgmt, size_t len)
2547 {
2548         struct ieee80211_local *local = sdata->local;
2549         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2550         u8 *pos;
2551         struct ieee802_11_elems elems;
2552         u32 tx_flags = 0;
2553
2554         pos = mgmt->u.auth.variable;
2555         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2556         if (!elems.challenge)
2557                 return;
2558         auth_data->expected_transaction = 4;
2559         drv_mgd_prepare_tx(sdata->local, sdata);
2560         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2561                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2562                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2563         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2564                             elems.challenge - 2, elems.challenge_len + 2,
2565                             auth_data->bss->bssid, auth_data->bss->bssid,
2566                             auth_data->key, auth_data->key_len,
2567                             auth_data->key_idx, tx_flags);
2568 }
2569
2570 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2571                                    struct ieee80211_mgmt *mgmt, size_t len)
2572 {
2573         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2574         u8 bssid[ETH_ALEN];
2575         u16 auth_alg, auth_transaction, status_code;
2576         struct sta_info *sta;
2577         struct ieee80211_event event = {
2578                 .type = MLME_EVENT,
2579                 .u.mlme.data = AUTH_EVENT,
2580         };
2581
2582         sdata_assert_lock(sdata);
2583
2584         if (len < 24 + 6)
2585                 return;
2586
2587         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2588                 return;
2589
2590         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2591
2592         if (!ether_addr_equal(bssid, mgmt->bssid))
2593                 return;
2594
2595         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2596         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2597         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2598
2599         if (auth_alg != ifmgd->auth_data->algorithm ||
2600             auth_transaction != ifmgd->auth_data->expected_transaction) {
2601                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2602                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2603                            auth_transaction,
2604                            ifmgd->auth_data->expected_transaction);
2605                 return;
2606         }
2607
2608         if (status_code != WLAN_STATUS_SUCCESS) {
2609                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2610                            mgmt->sa, status_code);
2611                 ieee80211_destroy_auth_data(sdata, false);
2612                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2613                 event.u.mlme.status = MLME_DENIED;
2614                 event.u.mlme.reason = status_code;
2615                 drv_event_callback(sdata->local, sdata, &event);
2616                 return;
2617         }
2618
2619         switch (ifmgd->auth_data->algorithm) {
2620         case WLAN_AUTH_OPEN:
2621         case WLAN_AUTH_LEAP:
2622         case WLAN_AUTH_FT:
2623         case WLAN_AUTH_SAE:
2624         case WLAN_AUTH_FILS_SK:
2625         case WLAN_AUTH_FILS_SK_PFS:
2626         case WLAN_AUTH_FILS_PK:
2627                 break;
2628         case WLAN_AUTH_SHARED_KEY:
2629                 if (ifmgd->auth_data->expected_transaction != 4) {
2630                         ieee80211_auth_challenge(sdata, mgmt, len);
2631                         /* need another frame */
2632                         return;
2633                 }
2634                 break;
2635         default:
2636                 WARN_ONCE(1, "invalid auth alg %d",
2637                           ifmgd->auth_data->algorithm);
2638                 return;
2639         }
2640
2641         event.u.mlme.status = MLME_SUCCESS;
2642         drv_event_callback(sdata->local, sdata, &event);
2643         sdata_info(sdata, "authenticated\n");
2644         ifmgd->auth_data->done = true;
2645         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2646         ifmgd->auth_data->timeout_started = true;
2647         run_again(sdata, ifmgd->auth_data->timeout);
2648
2649         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2650             ifmgd->auth_data->expected_transaction != 2) {
2651                 /*
2652                  * Report auth frame to user space for processing since another
2653                  * round of Authentication frames is still needed.
2654                  */
2655                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2656                 return;
2657         }
2658
2659         /* move station state to auth */
2660         mutex_lock(&sdata->local->sta_mtx);
2661         sta = sta_info_get(sdata, bssid);
2662         if (!sta) {
2663                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2664                 goto out_err;
2665         }
2666         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2667                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2668                 goto out_err;
2669         }
2670         mutex_unlock(&sdata->local->sta_mtx);
2671
2672         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2673         return;
2674  out_err:
2675         mutex_unlock(&sdata->local->sta_mtx);
2676         /* ignore frame -- wait for timeout */
2677 }
2678
2679 #define case_WLAN(type) \
2680         case WLAN_REASON_##type: return #type
2681
2682 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2683 {
2684         switch (reason_code) {
2685         case_WLAN(UNSPECIFIED);
2686         case_WLAN(PREV_AUTH_NOT_VALID);
2687         case_WLAN(DEAUTH_LEAVING);
2688         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2689         case_WLAN(DISASSOC_AP_BUSY);
2690         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2691         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2692         case_WLAN(DISASSOC_STA_HAS_LEFT);
2693         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2694         case_WLAN(DISASSOC_BAD_POWER);
2695         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2696         case_WLAN(INVALID_IE);
2697         case_WLAN(MIC_FAILURE);
2698         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2699         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2700         case_WLAN(IE_DIFFERENT);
2701         case_WLAN(INVALID_GROUP_CIPHER);
2702         case_WLAN(INVALID_PAIRWISE_CIPHER);
2703         case_WLAN(INVALID_AKMP);
2704         case_WLAN(UNSUPP_RSN_VERSION);
2705         case_WLAN(INVALID_RSN_IE_CAP);
2706         case_WLAN(IEEE8021X_FAILED);
2707         case_WLAN(CIPHER_SUITE_REJECTED);
2708         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2709         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2710         case_WLAN(DISASSOC_LOW_ACK);
2711         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2712         case_WLAN(QSTA_LEAVE_QBSS);
2713         case_WLAN(QSTA_NOT_USE);
2714         case_WLAN(QSTA_REQUIRE_SETUP);
2715         case_WLAN(QSTA_TIMEOUT);
2716         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2717         case_WLAN(MESH_PEER_CANCELED);
2718         case_WLAN(MESH_MAX_PEERS);
2719         case_WLAN(MESH_CONFIG);
2720         case_WLAN(MESH_CLOSE);
2721         case_WLAN(MESH_MAX_RETRIES);
2722         case_WLAN(MESH_CONFIRM_TIMEOUT);
2723         case_WLAN(MESH_INVALID_GTK);
2724         case_WLAN(MESH_INCONSISTENT_PARAM);
2725         case_WLAN(MESH_INVALID_SECURITY);
2726         case_WLAN(MESH_PATH_ERROR);
2727         case_WLAN(MESH_PATH_NOFORWARD);
2728         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2729         case_WLAN(MAC_EXISTS_IN_MBSS);
2730         case_WLAN(MESH_CHAN_REGULATORY);
2731         case_WLAN(MESH_CHAN);
2732         default: return "<unknown>";
2733         }
2734 }
2735
2736 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2737                                      struct ieee80211_mgmt *mgmt, size_t len)
2738 {
2739         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2740         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2741
2742         sdata_assert_lock(sdata);
2743
2744         if (len < 24 + 2)
2745                 return;
2746
2747         if (ifmgd->associated &&
2748             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2749                 const u8 *bssid = ifmgd->associated->bssid;
2750
2751                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2752                            bssid, reason_code,
2753                            ieee80211_get_reason_code_string(reason_code));
2754
2755                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2756
2757                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2758                                             reason_code);
2759                 return;
2760         }
2761
2762         if (ifmgd->assoc_data &&
2763             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2764                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2765
2766                 sdata_info(sdata,
2767                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2768                            bssid, reason_code,
2769                            ieee80211_get_reason_code_string(reason_code));
2770
2771                 ieee80211_destroy_assoc_data(sdata, false, true);
2772
2773                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2774                 return;
2775         }
2776 }
2777
2778
2779 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2780                                        struct ieee80211_mgmt *mgmt, size_t len)
2781 {
2782         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2783         u16 reason_code;
2784
2785         sdata_assert_lock(sdata);
2786
2787         if (len < 24 + 2)
2788                 return;
2789
2790         if (!ifmgd->associated ||
2791             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2792                 return;
2793
2794         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2795
2796         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2797                    mgmt->sa, reason_code,
2798                    ieee80211_get_reason_code_string(reason_code));
2799
2800         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2801
2802         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2803 }
2804
2805 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2806                                 u8 *supp_rates, unsigned int supp_rates_len,
2807                                 u32 *rates, u32 *basic_rates,
2808                                 bool *have_higher_than_11mbit,
2809                                 int *min_rate, int *min_rate_index,
2810                                 int shift)
2811 {
2812         int i, j;
2813
2814         for (i = 0; i < supp_rates_len; i++) {
2815                 int rate = supp_rates[i] & 0x7f;
2816                 bool is_basic = !!(supp_rates[i] & 0x80);
2817
2818                 if ((rate * 5 * (1 << shift)) > 110)
2819                         *have_higher_than_11mbit = true;
2820
2821                 /*
2822                  * Skip HT and VHT BSS membership selectors since they're not
2823                  * rates.
2824                  *
2825                  * Note: Even though the membership selector and the basic
2826                  *       rate flag share the same bit, they are not exactly
2827                  *       the same.
2828                  */
2829                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
2830                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
2831                         continue;
2832
2833                 for (j = 0; j < sband->n_bitrates; j++) {
2834                         struct ieee80211_rate *br;
2835                         int brate;
2836
2837                         br = &sband->bitrates[j];
2838
2839                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2840                         if (brate == rate) {
2841                                 *rates |= BIT(j);
2842                                 if (is_basic)
2843                                         *basic_rates |= BIT(j);
2844                                 if ((rate * 5) < *min_rate) {
2845                                         *min_rate = rate * 5;
2846                                         *min_rate_index = j;
2847                                 }
2848                                 break;
2849                         }
2850                 }
2851         }
2852 }
2853
2854 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2855                                     struct cfg80211_bss *cbss,
2856                                     struct ieee80211_mgmt *mgmt, size_t len)
2857 {
2858         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2859         struct ieee80211_local *local = sdata->local;
2860         struct ieee80211_supported_band *sband;
2861         struct sta_info *sta;
2862         u8 *pos;
2863         u16 capab_info, aid;
2864         struct ieee802_11_elems elems;
2865         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2866         const struct cfg80211_bss_ies *bss_ies = NULL;
2867         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2868         u32 changed = 0;
2869         int err;
2870         bool ret;
2871
2872         /* AssocResp and ReassocResp have identical structure */
2873
2874         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2875         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2876
2877         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2878                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2879                            aid);
2880         aid &= ~(BIT(15) | BIT(14));
2881
2882         ifmgd->broken_ap = false;
2883
2884         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2885                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2886                            aid);
2887                 aid = 0;
2888                 ifmgd->broken_ap = true;
2889         }
2890
2891         pos = mgmt->u.assoc_resp.variable;
2892         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2893
2894         if (!elems.supp_rates) {
2895                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2896                 return false;
2897         }
2898
2899         ifmgd->aid = aid;
2900         ifmgd->tdls_chan_switch_prohibited =
2901                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2902                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2903
2904         /*
2905          * Some APs are erroneously not including some information in their
2906          * (re)association response frames. Try to recover by using the data
2907          * from the beacon or probe response. This seems to afflict mobile
2908          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2909          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2910          */
2911         if ((assoc_data->wmm && !elems.wmm_param) ||
2912             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2913              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2914             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2915              (!elems.vht_cap_elem || !elems.vht_operation))) {
2916                 const struct cfg80211_bss_ies *ies;
2917                 struct ieee802_11_elems bss_elems;
2918
2919                 rcu_read_lock();
2920                 ies = rcu_dereference(cbss->ies);
2921                 if (ies)
2922                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2923                                           GFP_ATOMIC);
2924                 rcu_read_unlock();
2925                 if (!bss_ies)
2926                         return false;
2927
2928                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2929                                        false, &bss_elems);
2930                 if (assoc_data->wmm &&
2931                     !elems.wmm_param && bss_elems.wmm_param) {
2932                         elems.wmm_param = bss_elems.wmm_param;
2933                         sdata_info(sdata,
2934                                    "AP bug: WMM param missing from AssocResp\n");
2935                 }
2936
2937                 /*
2938                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2939                  * have to include the IEs in the (re)association response.
2940                  */
2941                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2942                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2943                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2944                         sdata_info(sdata,
2945                                    "AP bug: HT capability missing from AssocResp\n");
2946                 }
2947                 if (!elems.ht_operation && bss_elems.ht_operation &&
2948                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2949                         elems.ht_operation = bss_elems.ht_operation;
2950                         sdata_info(sdata,
2951                                    "AP bug: HT operation missing from AssocResp\n");
2952                 }
2953                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2954                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2955                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2956                         sdata_info(sdata,
2957                                    "AP bug: VHT capa missing from AssocResp\n");
2958                 }
2959                 if (!elems.vht_operation && bss_elems.vht_operation &&
2960                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2961                         elems.vht_operation = bss_elems.vht_operation;
2962                         sdata_info(sdata,
2963                                    "AP bug: VHT operation missing from AssocResp\n");
2964                 }
2965         }
2966
2967         /*
2968          * We previously checked these in the beacon/probe response, so
2969          * they should be present here. This is just a safety net.
2970          */
2971         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2972             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2973                 sdata_info(sdata,
2974                            "HT AP is missing WMM params or HT capability/operation\n");
2975                 ret = false;
2976                 goto out;
2977         }
2978
2979         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2980             (!elems.vht_cap_elem || !elems.vht_operation)) {
2981                 sdata_info(sdata,
2982                            "VHT AP is missing VHT capability/operation\n");
2983                 ret = false;
2984                 goto out;
2985         }
2986
2987         mutex_lock(&sdata->local->sta_mtx);
2988         /*
2989          * station info was already allocated and inserted before
2990          * the association and should be available to us
2991          */
2992         sta = sta_info_get(sdata, cbss->bssid);
2993         if (WARN_ON(!sta)) {
2994                 mutex_unlock(&sdata->local->sta_mtx);
2995                 ret = false;
2996                 goto out;
2997         }
2998
2999         sband = ieee80211_get_sband(sdata);
3000         if (!sband) {
3001                 mutex_unlock(&sdata->local->sta_mtx);
3002                 ret = false;
3003                 goto out;
3004         }
3005
3006         /* Set up internal HT/VHT capabilities */
3007         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3008                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3009                                                   elems.ht_cap_elem, sta);
3010
3011         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3012                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3013                                                     elems.vht_cap_elem, sta);
3014
3015         /*
3016          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3017          * in their association response, so ignore that data for our own
3018          * configuration. If it changed since the last beacon, we'll get the
3019          * next beacon and update then.
3020          */
3021
3022         /*
3023          * If an operating mode notification IE is present, override the
3024          * NSS calculation (that would be done in rate_control_rate_init())
3025          * and use the # of streams from that element.
3026          */
3027         if (elems.opmode_notif &&
3028             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3029                 u8 nss;
3030
3031                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3032                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3033                 nss += 1;
3034                 sta->sta.rx_nss = nss;
3035         }
3036
3037         rate_control_rate_init(sta);
3038
3039         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3040                 set_sta_flag(sta, WLAN_STA_MFP);
3041                 sta->sta.mfp = true;
3042         } else {
3043                 sta->sta.mfp = false;
3044         }
3045
3046         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3047
3048         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3049         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3050                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3051         if (err) {
3052                 sdata_info(sdata,
3053                            "failed to move station %pM to desired state\n",
3054                            sta->sta.addr);
3055                 WARN_ON(__sta_info_destroy(sta));
3056                 mutex_unlock(&sdata->local->sta_mtx);
3057                 ret = false;
3058                 goto out;
3059         }
3060
3061         mutex_unlock(&sdata->local->sta_mtx);
3062
3063         /*
3064          * Always handle WMM once after association regardless
3065          * of the first value the AP uses. Setting -1 here has
3066          * that effect because the AP values is an unsigned
3067          * 4-bit value.
3068          */
3069         ifmgd->wmm_last_param_set = -1;
3070
3071         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3072                 ieee80211_set_wmm_default(sdata, false, false);
3073         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3074                                              elems.wmm_param_len)) {
3075                 /* still enable QoS since we might have HT/VHT */
3076                 ieee80211_set_wmm_default(sdata, false, true);
3077                 /* set the disable-WMM flag in this case to disable
3078                  * tracking WMM parameter changes in the beacon if
3079                  * the parameters weren't actually valid. Doing so
3080                  * avoids changing parameters very strangely when
3081                  * the AP is going back and forth between valid and
3082                  * invalid parameters.
3083                  */
3084                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3085         }
3086         changed |= BSS_CHANGED_QOS;
3087
3088         if (elems.max_idle_period_ie) {
3089                 bss_conf->max_idle_period =
3090                         le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3091                 bss_conf->protected_keep_alive =
3092                         !!(elems.max_idle_period_ie->idle_options &
3093                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3094                 changed |= BSS_CHANGED_KEEP_ALIVE;
3095         } else {
3096                 bss_conf->max_idle_period = 0;
3097                 bss_conf->protected_keep_alive = false;
3098         }
3099
3100         /* set AID and assoc capability,
3101          * ieee80211_set_associated() will tell the driver */
3102         bss_conf->aid = aid;
3103         bss_conf->assoc_capability = capab_info;
3104         ieee80211_set_associated(sdata, cbss, changed);
3105
3106         /*
3107          * If we're using 4-addr mode, let the AP know that we're
3108          * doing so, so that it can create the STA VLAN on its side
3109          */
3110         if (ifmgd->use_4addr)
3111                 ieee80211_send_4addr_nullfunc(local, sdata);
3112
3113         /*
3114          * Start timer to probe the connection to the AP now.
3115          * Also start the timer that will detect beacon loss.
3116          */
3117         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3118         ieee80211_sta_reset_beacon_monitor(sdata);
3119
3120         ret = true;
3121  out:
3122         kfree(bss_ies);
3123         return ret;
3124 }
3125
3126 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3127                                          struct ieee80211_mgmt *mgmt,
3128                                          size_t len)
3129 {
3130         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3131         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3132         u16 capab_info, status_code, aid;
3133         struct ieee802_11_elems elems;
3134         int ac, uapsd_queues = -1;
3135         u8 *pos;
3136         bool reassoc;
3137         struct cfg80211_bss *bss;
3138         struct ieee80211_event event = {
3139                 .type = MLME_EVENT,
3140                 .u.mlme.data = ASSOC_EVENT,
3141         };
3142
3143         sdata_assert_lock(sdata);
3144
3145         if (!assoc_data)
3146                 return;
3147         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3148                 return;
3149
3150         /*
3151          * AssocResp and ReassocResp have identical structure, so process both
3152          * of them in this function.
3153          */
3154
3155         if (len < 24 + 6)
3156                 return;
3157
3158         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3159         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3160         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3161         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3162
3163         sdata_info(sdata,
3164                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3165                    reassoc ? "Rea" : "A", mgmt->sa,
3166                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3167
3168         if (assoc_data->fils_kek_len &&
3169             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3170                 return;
3171
3172         pos = mgmt->u.assoc_resp.variable;
3173         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3174
3175         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3176             elems.timeout_int &&
3177             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3178                 u32 tu, ms;
3179                 tu = le32_to_cpu(elems.timeout_int->value);
3180                 ms = tu * 1024 / 1000;
3181                 sdata_info(sdata,
3182                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3183                            mgmt->sa, tu, ms);
3184                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3185                 assoc_data->timeout_started = true;
3186                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3187                         run_again(sdata, assoc_data->timeout);
3188                 return;
3189         }
3190
3191         bss = assoc_data->bss;
3192
3193         if (status_code != WLAN_STATUS_SUCCESS) {
3194                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3195                            mgmt->sa, status_code);
3196                 ieee80211_destroy_assoc_data(sdata, false, false);
3197                 event.u.mlme.status = MLME_DENIED;
3198                 event.u.mlme.reason = status_code;
3199                 drv_event_callback(sdata->local, sdata, &event);
3200         } else {
3201                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3202                         /* oops -- internal error -- send timeout for now */
3203                         ieee80211_destroy_assoc_data(sdata, false, false);
3204                         cfg80211_assoc_timeout(sdata->dev, bss);
3205                         return;
3206                 }
3207                 event.u.mlme.status = MLME_SUCCESS;
3208                 drv_event_callback(sdata->local, sdata, &event);
3209                 sdata_info(sdata, "associated\n");
3210
3211                 /*
3212                  * destroy assoc_data afterwards, as otherwise an idle
3213                  * recalc after assoc_data is NULL but before associated
3214                  * is set can cause the interface to go idle
3215                  */
3216                 ieee80211_destroy_assoc_data(sdata, true, false);
3217
3218                 /* get uapsd queues configuration */
3219                 uapsd_queues = 0;
3220                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3221                         if (sdata->tx_conf[ac].uapsd)
3222                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3223         }
3224
3225         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3226 }
3227
3228 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3229                                   struct ieee80211_mgmt *mgmt, size_t len,
3230                                   struct ieee80211_rx_status *rx_status,
3231                                   struct ieee802_11_elems *elems)
3232 {
3233         struct ieee80211_local *local = sdata->local;
3234         struct ieee80211_bss *bss;
3235         struct ieee80211_channel *channel;
3236
3237         sdata_assert_lock(sdata);
3238
3239         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3240         if (!channel)
3241                 return;
3242
3243         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3244                                         channel);
3245         if (bss) {
3246                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3247                 ieee80211_rx_bss_put(local, bss);
3248         }
3249 }
3250
3251
3252 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3253                                          struct sk_buff *skb)
3254 {
3255         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3256         struct ieee80211_if_managed *ifmgd;
3257         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3258         size_t baselen, len = skb->len;
3259         struct ieee802_11_elems elems;
3260
3261         ifmgd = &sdata->u.mgd;
3262
3263         sdata_assert_lock(sdata);
3264
3265         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3266                 return; /* ignore ProbeResp to foreign address */
3267
3268         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3269         if (baselen > len)
3270                 return;
3271
3272         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3273                                false, &elems);
3274
3275         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3276
3277         if (ifmgd->associated &&
3278             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3279                 ieee80211_reset_ap_probe(sdata);
3280 }
3281
3282 /*
3283  * This is the canonical list of information elements we care about,
3284  * the filter code also gives us all changes to the Microsoft OUI
3285  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3286  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3287  * changes to requested client power.
3288  *
3289  * We implement beacon filtering in software since that means we can
3290  * avoid processing the frame here and in cfg80211, and userspace
3291  * will not be able to tell whether the hardware supports it or not.
3292  *
3293  * XXX: This list needs to be dynamic -- userspace needs to be able to
3294  *      add items it requires. It also needs to be able to tell us to
3295  *      look out for other vendor IEs.
3296  */
3297 static const u64 care_about_ies =
3298         (1ULL << WLAN_EID_COUNTRY) |
3299         (1ULL << WLAN_EID_ERP_INFO) |
3300         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3301         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3302         (1ULL << WLAN_EID_HT_CAPABILITY) |
3303         (1ULL << WLAN_EID_HT_OPERATION) |
3304         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3305
3306 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3307                                      struct ieee80211_mgmt *mgmt, size_t len,
3308                                      struct ieee80211_rx_status *rx_status)
3309 {
3310         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3311         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3312         size_t baselen;
3313         struct ieee802_11_elems elems;
3314         struct ieee80211_local *local = sdata->local;
3315         struct ieee80211_chanctx_conf *chanctx_conf;
3316         struct ieee80211_channel *chan;
3317         struct sta_info *sta;
3318         u32 changed = 0;
3319         bool erp_valid;
3320         u8 erp_value = 0;
3321         u32 ncrc;
3322         u8 *bssid;
3323         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3324
3325         sdata_assert_lock(sdata);
3326
3327         /* Process beacon from the current BSS */
3328         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3329         if (baselen > len)
3330                 return;
3331
3332         rcu_read_lock();
3333         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3334         if (!chanctx_conf) {
3335                 rcu_read_unlock();
3336                 return;
3337         }
3338
3339         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3340                 rcu_read_unlock();
3341                 return;
3342         }
3343         chan = chanctx_conf->def.chan;
3344         rcu_read_unlock();
3345
3346         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3347             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3348                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3349                                        len - baselen, false, &elems);
3350
3351                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3352                 if (elems.tim && !elems.parse_error) {
3353                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3354                         ifmgd->dtim_period = tim_ie->dtim_period;
3355                 }
3356                 ifmgd->have_beacon = true;
3357                 ifmgd->assoc_data->need_beacon = false;
3358                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3359                         sdata->vif.bss_conf.sync_tsf =
3360                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3361                         sdata->vif.bss_conf.sync_device_ts =
3362                                 rx_status->device_timestamp;
3363                         if (elems.tim)
3364                                 sdata->vif.bss_conf.sync_dtim_count =
3365                                         elems.tim->dtim_count;
3366                         else
3367                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3368                 }
3369                 /* continue assoc process */
3370                 ifmgd->assoc_data->timeout = jiffies;
3371                 ifmgd->assoc_data->timeout_started = true;
3372                 run_again(sdata, ifmgd->assoc_data->timeout);
3373                 return;
3374         }
3375
3376         if (!ifmgd->associated ||
3377             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3378                 return;
3379         bssid = ifmgd->associated->bssid;
3380
3381         /* Track average RSSI from the Beacon frames of the current AP */
3382         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3383                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3384                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3385                 ifmgd->last_cqm_event_signal = 0;
3386                 ifmgd->count_beacon_signal = 1;
3387                 ifmgd->last_ave_beacon_signal = 0;
3388         } else {
3389                 ifmgd->count_beacon_signal++;
3390         }
3391
3392         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3393
3394         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3395             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3396                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3397                 int last_sig = ifmgd->last_ave_beacon_signal;
3398                 struct ieee80211_event event = {
3399                         .type = RSSI_EVENT,
3400                 };
3401
3402                 /*
3403                  * if signal crosses either of the boundaries, invoke callback
3404                  * with appropriate parameters
3405                  */
3406                 if (sig > ifmgd->rssi_max_thold &&
3407                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3408                         ifmgd->last_ave_beacon_signal = sig;
3409                         event.u.rssi.data = RSSI_EVENT_HIGH;
3410                         drv_event_callback(local, sdata, &event);
3411                 } else if (sig < ifmgd->rssi_min_thold &&
3412                            (last_sig >= ifmgd->rssi_max_thold ||
3413                            last_sig == 0)) {
3414                         ifmgd->last_ave_beacon_signal = sig;
3415                         event.u.rssi.data = RSSI_EVENT_LOW;
3416                         drv_event_callback(local, sdata, &event);
3417                 }
3418         }
3419
3420         if (bss_conf->cqm_rssi_thold &&
3421             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3422             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3423                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3424                 int last_event = ifmgd->last_cqm_event_signal;
3425                 int thold = bss_conf->cqm_rssi_thold;
3426                 int hyst = bss_conf->cqm_rssi_hyst;
3427
3428                 if (sig < thold &&
3429                     (last_event == 0 || sig < last_event - hyst)) {
3430                         ifmgd->last_cqm_event_signal = sig;
3431                         ieee80211_cqm_rssi_notify(
3432                                 &sdata->vif,
3433                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3434                                 sig, GFP_KERNEL);
3435                 } else if (sig > thold &&
3436                            (last_event == 0 || sig > last_event + hyst)) {
3437                         ifmgd->last_cqm_event_signal = sig;
3438                         ieee80211_cqm_rssi_notify(
3439                                 &sdata->vif,
3440                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3441                                 sig, GFP_KERNEL);
3442                 }
3443         }
3444
3445         if (bss_conf->cqm_rssi_low &&
3446             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3447                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3448                 int last_event = ifmgd->last_cqm_event_signal;
3449                 int low = bss_conf->cqm_rssi_low;
3450                 int high = bss_conf->cqm_rssi_high;
3451
3452                 if (sig < low &&
3453                     (last_event == 0 || last_event >= low)) {
3454                         ifmgd->last_cqm_event_signal = sig;
3455                         ieee80211_cqm_rssi_notify(
3456                                 &sdata->vif,
3457                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3458                                 sig, GFP_KERNEL);
3459                 } else if (sig > high &&
3460                            (last_event == 0 || last_event <= high)) {
3461                         ifmgd->last_cqm_event_signal = sig;
3462                         ieee80211_cqm_rssi_notify(
3463                                 &sdata->vif,
3464                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3465                                 sig, GFP_KERNEL);
3466                 }
3467         }
3468
3469         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3470                 mlme_dbg_ratelimited(sdata,
3471                                      "cancelling AP probe due to a received beacon\n");
3472                 ieee80211_reset_ap_probe(sdata);
3473         }
3474
3475         /*
3476          * Push the beacon loss detection into the future since
3477          * we are processing a beacon from the AP just now.
3478          */
3479         ieee80211_sta_reset_beacon_monitor(sdata);
3480
3481         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3482         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3483                                           len - baselen, false, &elems,
3484                                           care_about_ies, ncrc);
3485
3486         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3487             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3488                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3489                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3490                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3491                                 ieee80211_hw_config(local,
3492                                                     IEEE80211_CONF_CHANGE_PS);
3493                         }
3494                         ieee80211_send_nullfunc(local, sdata, false);
3495                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3496                         local->pspolling = true;
3497
3498                         /*
3499                          * Here is assumed that the driver will be
3500                          * able to send ps-poll frame and receive a
3501                          * response even though power save mode is
3502                          * enabled, but some drivers might require
3503                          * to disable power save here. This needs
3504                          * to be investigated.
3505                          */
3506                         ieee80211_send_pspoll(local, sdata);
3507                 }
3508         }
3509
3510         if (sdata->vif.p2p ||
3511             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3512                 struct ieee80211_p2p_noa_attr noa = {};
3513                 int ret;
3514
3515                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3516                                             len - baselen,
3517                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3518                                             (u8 *) &noa, sizeof(noa));
3519                 if (ret >= 2) {
3520                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3521                                 /* valid noa_attr and index changed */
3522                                 sdata->u.mgd.p2p_noa_index = noa.index;
3523                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3524                                 changed |= BSS_CHANGED_P2P_PS;
3525                                 /*
3526                                  * make sure we update all information, the CRC
3527                                  * mechanism doesn't look at P2P attributes.
3528                                  */
3529                                 ifmgd->beacon_crc_valid = false;
3530                         }
3531                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3532                         /* noa_attr not found and we had valid noa_attr before */
3533                         sdata->u.mgd.p2p_noa_index = -1;
3534                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3535                         changed |= BSS_CHANGED_P2P_PS;
3536                         ifmgd->beacon_crc_valid = false;
3537                 }
3538         }
3539
3540         if (ifmgd->csa_waiting_bcn)
3541                 ieee80211_chswitch_post_beacon(sdata);
3542
3543         /*
3544          * Update beacon timing and dtim count on every beacon appearance. This
3545          * will allow the driver to use the most updated values. Do it before
3546          * comparing this one with last received beacon.
3547          * IMPORTANT: These parameters would possibly be out of sync by the time
3548          * the driver will use them. The synchronized view is currently
3549          * guaranteed only in certain callbacks.
3550          */
3551         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3552                 sdata->vif.bss_conf.sync_tsf =
3553                         le64_to_cpu(mgmt->u.beacon.timestamp);
3554                 sdata->vif.bss_conf.sync_device_ts =
3555                         rx_status->device_timestamp;
3556                 if (elems.tim)
3557                         sdata->vif.bss_conf.sync_dtim_count =
3558                                 elems.tim->dtim_count;
3559                 else
3560                         sdata->vif.bss_conf.sync_dtim_count = 0;
3561         }
3562
3563         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3564                 return;
3565         ifmgd->beacon_crc = ncrc;
3566         ifmgd->beacon_crc_valid = true;
3567
3568         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3569
3570         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3571                                          rx_status->device_timestamp,
3572                                          &elems, true);
3573
3574         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3575             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3576                                      elems.wmm_param_len))
3577                 changed |= BSS_CHANGED_QOS;
3578
3579         /*
3580          * If we haven't had a beacon before, tell the driver about the
3581          * DTIM period (and beacon timing if desired) now.
3582          */
3583         if (!ifmgd->have_beacon) {
3584                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3585                 if (elems.tim)
3586                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3587                 else
3588                         bss_conf->dtim_period = 1;
3589
3590                 changed |= BSS_CHANGED_BEACON_INFO;
3591                 ifmgd->have_beacon = true;
3592
3593                 mutex_lock(&local->iflist_mtx);
3594                 ieee80211_recalc_ps(local);
3595                 mutex_unlock(&local->iflist_mtx);
3596
3597                 ieee80211_recalc_ps_vif(sdata);
3598         }
3599
3600         if (elems.erp_info) {
3601                 erp_valid = true;
3602                 erp_value = elems.erp_info[0];
3603         } else {
3604                 erp_valid = false;
3605         }
3606         changed |= ieee80211_handle_bss_capability(sdata,
3607                         le16_to_cpu(mgmt->u.beacon.capab_info),
3608                         erp_valid, erp_value);
3609
3610         mutex_lock(&local->sta_mtx);
3611         sta = sta_info_get(sdata, bssid);
3612
3613         if (ieee80211_config_bw(sdata, sta,
3614                                 elems.ht_cap_elem, elems.ht_operation,
3615                                 elems.vht_operation, bssid, &changed)) {
3616                 mutex_unlock(&local->sta_mtx);
3617                 sdata_info(sdata,
3618                            "failed to follow AP %pM bandwidth change, disconnect\n",
3619                            bssid);
3620                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3621                                        WLAN_REASON_DEAUTH_LEAVING,
3622                                        true, deauth_buf);
3623                 ieee80211_report_disconnect(sdata, deauth_buf,
3624                                             sizeof(deauth_buf), true,
3625                                             WLAN_REASON_DEAUTH_LEAVING);
3626                 return;
3627         }
3628
3629         if (sta && elems.opmode_notif)
3630                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3631                                             rx_status->band);
3632         mutex_unlock(&local->sta_mtx);
3633
3634         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3635                                                elems.country_elem,
3636                                                elems.country_elem_len,
3637                                                elems.pwr_constr_elem,
3638                                                elems.cisco_dtpc_elem);
3639
3640         ieee80211_bss_info_change_notify(sdata, changed);
3641 }
3642
3643 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3644                                   struct sk_buff *skb)
3645 {
3646         struct ieee80211_rx_status *rx_status;
3647         struct ieee80211_mgmt *mgmt;
3648         u16 fc;
3649         struct ieee802_11_elems elems;
3650         int ies_len;
3651
3652         rx_status = (struct ieee80211_rx_status *) skb->cb;
3653         mgmt = (struct ieee80211_mgmt *) skb->data;
3654         fc = le16_to_cpu(mgmt->frame_control);
3655
3656         sdata_lock(sdata);
3657
3658         switch (fc & IEEE80211_FCTL_STYPE) {
3659         case IEEE80211_STYPE_BEACON:
3660                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3661                 break;
3662         case IEEE80211_STYPE_PROBE_RESP:
3663                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3664                 break;
3665         case IEEE80211_STYPE_AUTH:
3666                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3667                 break;
3668         case IEEE80211_STYPE_DEAUTH:
3669                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3670                 break;
3671         case IEEE80211_STYPE_DISASSOC:
3672                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3673                 break;
3674         case IEEE80211_STYPE_ASSOC_RESP:
3675         case IEEE80211_STYPE_REASSOC_RESP:
3676                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3677                 break;
3678         case IEEE80211_STYPE_ACTION:
3679                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3680                         ies_len = skb->len -
3681                                   offsetof(struct ieee80211_mgmt,
3682                                            u.action.u.chan_switch.variable);
3683
3684                         if (ies_len < 0)
3685                                 break;
3686
3687                         ieee802_11_parse_elems(
3688                                 mgmt->u.action.u.chan_switch.variable,
3689                                 ies_len, true, &elems);
3690
3691                         if (elems.parse_error)
3692                                 break;
3693
3694                         ieee80211_sta_process_chanswitch(sdata,
3695                                                  rx_status->mactime,
3696                                                  rx_status->device_timestamp,
3697                                                  &elems, false);
3698                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3699                         ies_len = skb->len -
3700                                   offsetof(struct ieee80211_mgmt,
3701                                            u.action.u.ext_chan_switch.variable);
3702
3703                         if (ies_len < 0)
3704                                 break;
3705
3706                         ieee802_11_parse_elems(
3707                                 mgmt->u.action.u.ext_chan_switch.variable,
3708                                 ies_len, true, &elems);
3709
3710                         if (elems.parse_error)
3711                                 break;
3712
3713                         /* for the handling code pretend this was also an IE */
3714                         elems.ext_chansw_ie =
3715                                 &mgmt->u.action.u.ext_chan_switch.data;
3716
3717                         ieee80211_sta_process_chanswitch(sdata,
3718                                                  rx_status->mactime,
3719                                                  rx_status->device_timestamp,
3720                                                  &elems, false);
3721                 }
3722                 break;
3723         }
3724         sdata_unlock(sdata);
3725 }
3726
3727 static void ieee80211_sta_timer(unsigned long data)
3728 {
3729         struct ieee80211_sub_if_data *sdata =
3730                 (struct ieee80211_sub_if_data *) data;
3731
3732         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3733 }
3734
3735 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3736                                           u8 *bssid, u8 reason, bool tx)
3737 {
3738         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3739
3740         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3741                                tx, frame_buf);
3742
3743         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3744                                     reason);
3745 }
3746
3747 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3748 {
3749         struct ieee80211_local *local = sdata->local;
3750         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3751         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3752         u32 tx_flags = 0;
3753         u16 trans = 1;
3754         u16 status = 0;
3755
3756         sdata_assert_lock(sdata);
3757
3758         if (WARN_ON_ONCE(!auth_data))
3759                 return -EINVAL;
3760
3761         auth_data->tries++;
3762
3763         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3764                 sdata_info(sdata, "authentication with %pM timed out\n",
3765                            auth_data->bss->bssid);
3766
3767                 /*
3768                  * Most likely AP is not in the range so remove the
3769                  * bss struct for that AP.
3770                  */
3771                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3772
3773                 return -ETIMEDOUT;
3774         }
3775
3776         drv_mgd_prepare_tx(local, sdata);
3777
3778         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3779                    auth_data->bss->bssid, auth_data->tries,
3780                    IEEE80211_AUTH_MAX_TRIES);
3781
3782         auth_data->expected_transaction = 2;
3783
3784         if (auth_data->algorithm == WLAN_AUTH_SAE) {
3785                 trans = auth_data->sae_trans;
3786                 status = auth_data->sae_status;
3787                 auth_data->expected_transaction = trans;
3788         }
3789
3790         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3791                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3792                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3793
3794         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3795                             auth_data->data, auth_data->data_len,
3796                             auth_data->bss->bssid,
3797                             auth_data->bss->bssid, NULL, 0, 0,
3798                             tx_flags);
3799
3800         if (tx_flags == 0) {
3801                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3802                 auth_data->timeout_started = true;
3803                 run_again(sdata, auth_data->timeout);
3804         } else {
3805                 auth_data->timeout =
3806                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3807                 auth_data->timeout_started = true;
3808                 run_again(sdata, auth_data->timeout);
3809         }
3810
3811         return 0;
3812 }
3813
3814 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3815 {
3816         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3817         struct ieee80211_local *local = sdata->local;
3818
3819         sdata_assert_lock(sdata);
3820
3821         assoc_data->tries++;
3822         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3823                 sdata_info(sdata, "association with %pM timed out\n",
3824                            assoc_data->bss->bssid);
3825
3826                 /*
3827                  * Most likely AP is not in the range so remove the
3828                  * bss struct for that AP.
3829                  */
3830                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3831
3832                 return -ETIMEDOUT;
3833         }
3834
3835         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3836                    assoc_data->bss->bssid, assoc_data->tries,
3837                    IEEE80211_ASSOC_MAX_TRIES);
3838         ieee80211_send_assoc(sdata);
3839
3840         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3841                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3842                 assoc_data->timeout_started = true;
3843                 run_again(sdata, assoc_data->timeout);
3844         } else {
3845                 assoc_data->timeout =
3846                         round_jiffies_up(jiffies +
3847                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3848                 assoc_data->timeout_started = true;
3849                 run_again(sdata, assoc_data->timeout);
3850         }
3851
3852         return 0;
3853 }
3854
3855 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3856                                   __le16 fc, bool acked)
3857 {
3858         struct ieee80211_local *local = sdata->local;
3859
3860         sdata->u.mgd.status_fc = fc;
3861         sdata->u.mgd.status_acked = acked;
3862         sdata->u.mgd.status_received = true;
3863
3864         ieee80211_queue_work(&local->hw, &sdata->work);
3865 }
3866
3867 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3868 {
3869         struct ieee80211_local *local = sdata->local;
3870         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3871
3872         sdata_lock(sdata);
3873
3874         if (ifmgd->status_received) {
3875                 __le16 fc = ifmgd->status_fc;
3876                 bool status_acked = ifmgd->status_acked;
3877
3878                 ifmgd->status_received = false;
3879                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3880                         if (status_acked) {
3881                                 ifmgd->auth_data->timeout =
3882                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3883                                 run_again(sdata, ifmgd->auth_data->timeout);
3884                         } else {
3885                                 ifmgd->auth_data->timeout = jiffies - 1;
3886                         }
3887                         ifmgd->auth_data->timeout_started = true;
3888                 } else if (ifmgd->assoc_data &&
3889                            (ieee80211_is_assoc_req(fc) ||
3890                             ieee80211_is_reassoc_req(fc))) {
3891                         if (status_acked) {
3892                                 ifmgd->assoc_data->timeout =
3893                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3894                                 run_again(sdata, ifmgd->assoc_data->timeout);
3895                         } else {
3896                                 ifmgd->assoc_data->timeout = jiffies - 1;
3897                         }
3898                         ifmgd->assoc_data->timeout_started = true;
3899                 }
3900         }
3901
3902         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3903             time_after(jiffies, ifmgd->auth_data->timeout)) {
3904                 if (ifmgd->auth_data->done) {
3905                         /*
3906                          * ok ... we waited for assoc but userspace didn't,
3907                          * so let's just kill the auth data
3908                          */
3909                         ieee80211_destroy_auth_data(sdata, false);
3910                 } else if (ieee80211_auth(sdata)) {
3911                         u8 bssid[ETH_ALEN];
3912                         struct ieee80211_event event = {
3913                                 .type = MLME_EVENT,
3914                                 .u.mlme.data = AUTH_EVENT,
3915                                 .u.mlme.status = MLME_TIMEOUT,
3916                         };
3917
3918                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3919
3920                         ieee80211_destroy_auth_data(sdata, false);
3921
3922                         cfg80211_auth_timeout(sdata->dev, bssid);
3923                         drv_event_callback(sdata->local, sdata, &event);
3924                 }
3925         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3926                 run_again(sdata, ifmgd->auth_data->timeout);
3927
3928         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3929             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3930                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3931                     ieee80211_do_assoc(sdata)) {
3932                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3933                         struct ieee80211_event event = {
3934                                 .type = MLME_EVENT,
3935                                 .u.mlme.data = ASSOC_EVENT,
3936                                 .u.mlme.status = MLME_TIMEOUT,
3937                         };
3938
3939                         ieee80211_destroy_assoc_data(sdata, false, false);
3940                         cfg80211_assoc_timeout(sdata->dev, bss);
3941                         drv_event_callback(sdata->local, sdata, &event);
3942                 }
3943         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3944                 run_again(sdata, ifmgd->assoc_data->timeout);
3945
3946         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3947             ifmgd->associated) {
3948                 u8 bssid[ETH_ALEN];
3949                 int max_tries;
3950
3951                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3952
3953                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3954                         max_tries = max_nullfunc_tries;
3955                 else
3956                         max_tries = max_probe_tries;
3957
3958                 /* ACK received for nullfunc probing frame */
3959                 if (!ifmgd->probe_send_count)
3960                         ieee80211_reset_ap_probe(sdata);
3961                 else if (ifmgd->nullfunc_failed) {
3962                         if (ifmgd->probe_send_count < max_tries) {
3963                                 mlme_dbg(sdata,
3964                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3965                                          bssid, ifmgd->probe_send_count,
3966                                          max_tries);
3967                                 ieee80211_mgd_probe_ap_send(sdata);
3968                         } else {
3969                                 mlme_dbg(sdata,
3970                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3971                                          bssid);
3972                                 ieee80211_sta_connection_lost(sdata, bssid,
3973                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3974                                         false);
3975                         }
3976                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3977                         run_again(sdata, ifmgd->probe_timeout);
3978                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3979                         mlme_dbg(sdata,
3980                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3981                                  bssid, probe_wait_ms);
3982                         ieee80211_sta_connection_lost(sdata, bssid,
3983                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3984                 } else if (ifmgd->probe_send_count < max_tries) {
3985                         mlme_dbg(sdata,
3986                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3987                                  bssid, probe_wait_ms,
3988                                  ifmgd->probe_send_count, max_tries);
3989                         ieee80211_mgd_probe_ap_send(sdata);
3990                 } else {
3991                         /*
3992                          * We actually lost the connection ... or did we?
3993                          * Let's make sure!
3994                          */
3995                         mlme_dbg(sdata,
3996                                  "No probe response from AP %pM after %dms, disconnecting.\n",
3997                                  bssid, probe_wait_ms);
3998
3999                         ieee80211_sta_connection_lost(sdata, bssid,
4000                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4001                 }
4002         }
4003
4004         sdata_unlock(sdata);
4005 }
4006
4007 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
4008 {
4009         struct ieee80211_sub_if_data *sdata =
4010                 (struct ieee80211_sub_if_data *) data;
4011         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4012
4013         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4014                 return;
4015
4016         sdata->u.mgd.connection_loss = false;
4017         ieee80211_queue_work(&sdata->local->hw,
4018                              &sdata->u.mgd.beacon_connection_loss_work);
4019 }
4020
4021 static void ieee80211_sta_conn_mon_timer(unsigned long data)
4022 {
4023         struct ieee80211_sub_if_data *sdata =
4024                 (struct ieee80211_sub_if_data *) data;
4025         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4026         struct ieee80211_local *local = sdata->local;
4027
4028         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4029                 return;
4030
4031         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4032 }
4033
4034 static void ieee80211_sta_monitor_work(struct work_struct *work)
4035 {
4036         struct ieee80211_sub_if_data *sdata =
4037                 container_of(work, struct ieee80211_sub_if_data,
4038                              u.mgd.monitor_work);
4039
4040         ieee80211_mgd_probe_ap(sdata, false);
4041 }
4042
4043 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4044 {
4045         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4046                 __ieee80211_stop_poll(sdata);
4047
4048                 /* let's probe the connection once */
4049                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4050                         ieee80211_queue_work(&sdata->local->hw,
4051                                              &sdata->u.mgd.monitor_work);
4052         }
4053 }
4054
4055 #ifdef CONFIG_PM
4056 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4057 {
4058         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4059         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4060
4061         sdata_lock(sdata);
4062
4063         if (ifmgd->auth_data || ifmgd->assoc_data) {
4064                 const u8 *bssid = ifmgd->auth_data ?
4065                                 ifmgd->auth_data->bss->bssid :
4066                                 ifmgd->assoc_data->bss->bssid;
4067
4068                 /*
4069                  * If we are trying to authenticate / associate while suspending,
4070                  * cfg80211 won't know and won't actually abort those attempts,
4071                  * thus we need to do that ourselves.
4072                  */
4073                 ieee80211_send_deauth_disassoc(sdata, bssid,
4074                                                IEEE80211_STYPE_DEAUTH,
4075                                                WLAN_REASON_DEAUTH_LEAVING,
4076                                                false, frame_buf);
4077                 if (ifmgd->assoc_data)
4078                         ieee80211_destroy_assoc_data(sdata, false, true);
4079                 if (ifmgd->auth_data)
4080                         ieee80211_destroy_auth_data(sdata, false);
4081                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4082                                       IEEE80211_DEAUTH_FRAME_LEN);
4083         }
4084
4085         /* This is a bit of a hack - we should find a better and more generic
4086          * solution to this. Normally when suspending, cfg80211 will in fact
4087          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4088          * auth (not so important) or assoc (this is the problem) process.
4089          *
4090          * As a consequence, it can happen that we are in the process of both
4091          * associating and suspending, and receive an association response
4092          * after cfg80211 has checked if it needs to disconnect, but before
4093          * we actually set the flag to drop incoming frames. This will then
4094          * cause the workqueue flush to process the association response in
4095          * the suspend, resulting in a successful association just before it
4096          * tries to remove the interface from the driver, which now though
4097          * has a channel context assigned ... this results in issues.
4098          *
4099          * To work around this (for now) simply deauth here again if we're
4100          * now connected.
4101          */
4102         if (ifmgd->associated && !sdata->local->wowlan) {
4103                 u8 bssid[ETH_ALEN];
4104                 struct cfg80211_deauth_request req = {
4105                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4106                         .bssid = bssid,
4107                 };
4108
4109                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4110                 ieee80211_mgd_deauth(sdata, &req);
4111         }
4112
4113         sdata_unlock(sdata);
4114 }
4115
4116 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4117 {
4118         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4119
4120         sdata_lock(sdata);
4121         if (!ifmgd->associated) {
4122                 sdata_unlock(sdata);
4123                 return;
4124         }
4125
4126         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4127                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4128                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4129                 ieee80211_sta_connection_lost(sdata,
4130                                               ifmgd->associated->bssid,
4131                                               WLAN_REASON_UNSPECIFIED,
4132                                               true);
4133                 sdata_unlock(sdata);
4134                 return;
4135         }
4136         sdata_unlock(sdata);
4137 }
4138 #endif
4139
4140 /* interface setup */
4141 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4142 {
4143         struct ieee80211_if_managed *ifmgd;
4144
4145         ifmgd = &sdata->u.mgd;
4146         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4147         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4148         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4149                   ieee80211_beacon_connection_loss_work);
4150         INIT_WORK(&ifmgd->csa_connection_drop_work,
4151                   ieee80211_csa_connection_drop_work);
4152         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4153         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4154                           ieee80211_tdls_peer_del_work);
4155         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4156                     (unsigned long) sdata);
4157         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4158                     (unsigned long) sdata);
4159         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4160                     (unsigned long) sdata);
4161         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4162                     (unsigned long) sdata);
4163         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4164                           ieee80211_sta_handle_tspec_ac_params_wk);
4165
4166         ifmgd->flags = 0;
4167         ifmgd->powersave = sdata->wdev.ps;
4168         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4169         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4170         ifmgd->p2p_noa_index = -1;
4171
4172         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4173                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4174         else
4175                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4176
4177         /* Setup TDLS data */
4178         spin_lock_init(&ifmgd->teardown_lock);
4179         ifmgd->teardown_skb = NULL;
4180         ifmgd->orig_teardown_skb = NULL;
4181 }
4182
4183 /* scan finished notification */
4184 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4185 {
4186         struct ieee80211_sub_if_data *sdata;
4187
4188         /* Restart STA timers */
4189         rcu_read_lock();
4190         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4191                 if (ieee80211_sdata_running(sdata))
4192                         ieee80211_restart_sta_timer(sdata);
4193         }
4194         rcu_read_unlock();
4195 }
4196
4197 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4198                                      struct cfg80211_bss *cbss)
4199 {
4200         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4201         const u8 *ht_cap_ie, *vht_cap_ie;
4202         const struct ieee80211_ht_cap *ht_cap;
4203         const struct ieee80211_vht_cap *vht_cap;
4204         u8 chains = 1;
4205
4206         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4207                 return chains;
4208
4209         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4210         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4211                 ht_cap = (void *)(ht_cap_ie + 2);
4212                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4213                 /*
4214                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4215                  *       "Tx Unequal Modulation Supported" fields.
4216                  */
4217         }
4218
4219         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4220                 return chains;
4221
4222         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4223         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4224                 u8 nss;
4225                 u16 tx_mcs_map;
4226
4227                 vht_cap = (void *)(vht_cap_ie + 2);
4228                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4229                 for (nss = 8; nss > 0; nss--) {
4230                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4231                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4232                                 break;
4233                 }
4234                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4235                 chains = max(chains, nss);
4236         }
4237
4238         return chains;
4239 }
4240
4241 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4242                                   struct cfg80211_bss *cbss)
4243 {
4244         struct ieee80211_local *local = sdata->local;
4245         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4246         const struct ieee80211_ht_cap *ht_cap = NULL;
4247         const struct ieee80211_ht_operation *ht_oper = NULL;
4248         const struct ieee80211_vht_operation *vht_oper = NULL;
4249         struct ieee80211_supported_band *sband;
4250         struct cfg80211_chan_def chandef;
4251         int ret;
4252         u32 i;
4253         bool have_80mhz;
4254
4255         sband = local->hw.wiphy->bands[cbss->channel->band];
4256
4257         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4258                           IEEE80211_STA_DISABLE_80P80MHZ |
4259                           IEEE80211_STA_DISABLE_160MHZ);
4260
4261         rcu_read_lock();
4262
4263         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4264             sband->ht_cap.ht_supported) {
4265                 const u8 *ht_oper_ie, *ht_cap_ie;
4266
4267                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4268                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4269                         ht_oper = (void *)(ht_oper_ie + 2);
4270
4271                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4272                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4273                         ht_cap = (void *)(ht_cap_ie + 2);
4274
4275                 if (!ht_cap) {
4276                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4277                         ht_oper = NULL;
4278                 }
4279         }
4280
4281         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4282             sband->vht_cap.vht_supported) {
4283                 const u8 *vht_oper_ie, *vht_cap;
4284
4285                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4286                                                    WLAN_EID_VHT_OPERATION);
4287                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4288                         vht_oper = (void *)(vht_oper_ie + 2);
4289                 if (vht_oper && !ht_oper) {
4290                         vht_oper = NULL;
4291                         sdata_info(sdata,
4292                                    "AP advertised VHT without HT, disabling both\n");
4293                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4294                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4295                 }
4296
4297                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4298                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4299                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4300                         vht_oper = NULL;
4301                 }
4302         }
4303
4304         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4305         have_80mhz = false;
4306         for (i = 0; i < sband->n_channels; i++) {
4307                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4308                                                 IEEE80211_CHAN_NO_80MHZ))
4309                         continue;
4310
4311                 have_80mhz = true;
4312                 break;
4313         }
4314
4315         if (!have_80mhz)
4316                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4317
4318         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4319                                                      cbss->channel,
4320                                                      ht_cap, ht_oper, vht_oper,
4321                                                      &chandef, false);
4322
4323         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4324                                       local->rx_chains);
4325
4326         rcu_read_unlock();
4327
4328         /* will change later if needed */
4329         sdata->smps_mode = IEEE80211_SMPS_OFF;
4330
4331         mutex_lock(&local->mtx);
4332         /*
4333          * If this fails (possibly due to channel context sharing
4334          * on incompatible channels, e.g. 80+80 and 160 sharing the
4335          * same control channel) try to use a smaller bandwidth.
4336          */
4337         ret = ieee80211_vif_use_channel(sdata, &chandef,
4338                                         IEEE80211_CHANCTX_SHARED);
4339
4340         /* don't downgrade for 5 and 10 MHz channels, though. */
4341         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4342             chandef.width == NL80211_CHAN_WIDTH_10)
4343                 goto out;
4344
4345         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4346                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4347                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4348                                                 IEEE80211_CHANCTX_SHARED);
4349         }
4350  out:
4351         mutex_unlock(&local->mtx);
4352         return ret;
4353 }
4354
4355 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4356                                      struct cfg80211_bss *cbss, bool assoc,
4357                                      bool override)
4358 {
4359         struct ieee80211_local *local = sdata->local;
4360         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4361         struct ieee80211_bss *bss = (void *)cbss->priv;
4362         struct sta_info *new_sta = NULL;
4363         struct ieee80211_supported_band *sband;
4364         bool have_sta = false;
4365         int err;
4366
4367         sband = local->hw.wiphy->bands[cbss->channel->band];
4368
4369         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4370                 return -EINVAL;
4371
4372         /* If a reconfig is happening, bail out */
4373         if (local->in_reconfig)
4374                 return -EBUSY;
4375
4376         if (assoc) {
4377                 rcu_read_lock();
4378                 have_sta = sta_info_get(sdata, cbss->bssid);
4379                 rcu_read_unlock();
4380         }
4381
4382         if (!have_sta) {
4383                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4384                 if (!new_sta)
4385                         return -ENOMEM;
4386         }
4387
4388         /*
4389          * Set up the information for the new channel before setting the
4390          * new channel. We can't - completely race-free - change the basic
4391          * rates bitmap and the channel (sband) that it refers to, but if
4392          * we set it up before we at least avoid calling into the driver's
4393          * bss_info_changed() method with invalid information (since we do
4394          * call that from changing the channel - only for IDLE and perhaps
4395          * some others, but ...).
4396          *
4397          * So to avoid that, just set up all the new information before the
4398          * channel, but tell the driver to apply it only afterwards, since
4399          * it might need the new channel for that.
4400          */
4401         if (new_sta) {
4402                 u32 rates = 0, basic_rates = 0;
4403                 bool have_higher_than_11mbit;
4404                 int min_rate = INT_MAX, min_rate_index = -1;
4405                 const struct cfg80211_bss_ies *ies;
4406                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4407
4408                 ieee80211_get_rates(sband, bss->supp_rates,
4409                                     bss->supp_rates_len,
4410                                     &rates, &basic_rates,
4411                                     &have_higher_than_11mbit,
4412                                     &min_rate, &min_rate_index,
4413                                     shift);
4414
4415                 /*
4416                  * This used to be a workaround for basic rates missing
4417                  * in the association response frame. Now that we no
4418                  * longer use the basic rates from there, it probably
4419                  * doesn't happen any more, but keep the workaround so
4420                  * in case some *other* APs are buggy in different ways
4421                  * we can connect -- with a warning.
4422                  */
4423                 if (!basic_rates && min_rate_index >= 0) {
4424                         sdata_info(sdata,
4425                                    "No basic rates, using min rate instead\n");
4426                         basic_rates = BIT(min_rate_index);
4427                 }
4428
4429                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4430                 sdata->vif.bss_conf.basic_rates = basic_rates;
4431
4432                 /* cf. IEEE 802.11 9.2.12 */
4433                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4434                     have_higher_than_11mbit)
4435                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4436                 else
4437                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4438
4439                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4440
4441                 /* set timing information */
4442                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4443                 rcu_read_lock();
4444                 ies = rcu_dereference(cbss->beacon_ies);
4445                 if (ies) {
4446                         const u8 *tim_ie;
4447
4448                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4449                         sdata->vif.bss_conf.sync_device_ts =
4450                                 bss->device_ts_beacon;
4451                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4452                                                   ies->data, ies->len);
4453                         if (tim_ie && tim_ie[1] >= 2)
4454                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4455                         else
4456                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4457                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4458                                                TIMING_BEACON_ONLY)) {
4459                         ies = rcu_dereference(cbss->proberesp_ies);
4460                         /* must be non-NULL since beacon IEs were NULL */
4461                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4462                         sdata->vif.bss_conf.sync_device_ts =
4463                                 bss->device_ts_presp;
4464                         sdata->vif.bss_conf.sync_dtim_count = 0;
4465                 } else {
4466                         sdata->vif.bss_conf.sync_tsf = 0;
4467                         sdata->vif.bss_conf.sync_device_ts = 0;
4468                         sdata->vif.bss_conf.sync_dtim_count = 0;
4469                 }
4470                 rcu_read_unlock();
4471         }
4472
4473         if (new_sta || override) {
4474                 err = ieee80211_prep_channel(sdata, cbss);
4475                 if (err) {
4476                         if (new_sta)
4477                                 sta_info_free(local, new_sta);
4478                         return -EINVAL;
4479                 }
4480         }
4481
4482         if (new_sta) {
4483                 /*
4484                  * tell driver about BSSID, basic rates and timing
4485                  * this was set up above, before setting the channel
4486                  */
4487                 ieee80211_bss_info_change_notify(sdata,
4488                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4489                         BSS_CHANGED_BEACON_INT);
4490
4491                 if (assoc)
4492                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4493
4494                 err = sta_info_insert(new_sta);
4495                 new_sta = NULL;
4496                 if (err) {
4497                         sdata_info(sdata,
4498                                    "failed to insert STA entry for the AP (error %d)\n",
4499                                    err);
4500                         return err;
4501                 }
4502         } else
4503                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4504
4505         /* Cancel scan to ensure that nothing interferes with connection */
4506         if (local->scanning)
4507                 ieee80211_scan_cancel(local);
4508
4509         return 0;
4510 }
4511
4512 /* config hooks */
4513 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4514                        struct cfg80211_auth_request *req)
4515 {
4516         struct ieee80211_local *local = sdata->local;
4517         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4518         struct ieee80211_mgd_auth_data *auth_data;
4519         u16 auth_alg;
4520         int err;
4521
4522         /* prepare auth data structure */
4523
4524         switch (req->auth_type) {
4525         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4526                 auth_alg = WLAN_AUTH_OPEN;
4527                 break;
4528         case NL80211_AUTHTYPE_SHARED_KEY:
4529                 if (IS_ERR(local->wep_tx_tfm))
4530                         return -EOPNOTSUPP;
4531                 auth_alg = WLAN_AUTH_SHARED_KEY;
4532                 break;
4533         case NL80211_AUTHTYPE_FT:
4534                 auth_alg = WLAN_AUTH_FT;
4535                 break;
4536         case NL80211_AUTHTYPE_NETWORK_EAP:
4537                 auth_alg = WLAN_AUTH_LEAP;
4538                 break;
4539         case NL80211_AUTHTYPE_SAE:
4540                 auth_alg = WLAN_AUTH_SAE;
4541                 break;
4542         case NL80211_AUTHTYPE_FILS_SK:
4543                 auth_alg = WLAN_AUTH_FILS_SK;
4544                 break;
4545         case NL80211_AUTHTYPE_FILS_SK_PFS:
4546                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4547                 break;
4548         case NL80211_AUTHTYPE_FILS_PK:
4549                 auth_alg = WLAN_AUTH_FILS_PK;
4550                 break;
4551         default:
4552                 return -EOPNOTSUPP;
4553         }
4554
4555         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4556                             req->ie_len, GFP_KERNEL);
4557         if (!auth_data)
4558                 return -ENOMEM;
4559
4560         auth_data->bss = req->bss;
4561
4562         if (req->auth_data_len >= 4) {
4563                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4564                         __le16 *pos = (__le16 *) req->auth_data;
4565
4566                         auth_data->sae_trans = le16_to_cpu(pos[0]);
4567                         auth_data->sae_status = le16_to_cpu(pos[1]);
4568                 }
4569                 memcpy(auth_data->data, req->auth_data + 4,
4570                        req->auth_data_len - 4);
4571                 auth_data->data_len += req->auth_data_len - 4;
4572         }
4573
4574         if (req->ie && req->ie_len) {
4575                 memcpy(&auth_data->data[auth_data->data_len],
4576                        req->ie, req->ie_len);
4577                 auth_data->data_len += req->ie_len;
4578         }
4579
4580         if (req->key && req->key_len) {
4581                 auth_data->key_len = req->key_len;
4582                 auth_data->key_idx = req->key_idx;
4583                 memcpy(auth_data->key, req->key, req->key_len);
4584         }
4585
4586         auth_data->algorithm = auth_alg;
4587
4588         /* try to authenticate/probe */
4589
4590         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4591             ifmgd->assoc_data) {
4592                 err = -EBUSY;
4593                 goto err_free;
4594         }
4595
4596         if (ifmgd->auth_data)
4597                 ieee80211_destroy_auth_data(sdata, false);
4598
4599         /* prep auth_data so we don't go into idle on disassoc */
4600         ifmgd->auth_data = auth_data;
4601
4602         if (ifmgd->associated) {
4603                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4604
4605                 sdata_info(sdata,
4606                            "disconnect from AP %pM for new auth to %pM\n",
4607                            ifmgd->associated->bssid, req->bss->bssid);
4608                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4609                                        WLAN_REASON_UNSPECIFIED,
4610                                        false, frame_buf);
4611
4612                 ieee80211_report_disconnect(sdata, frame_buf,
4613                                             sizeof(frame_buf), true,
4614                                             WLAN_REASON_UNSPECIFIED);
4615         }
4616
4617         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4618
4619         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4620         if (err)
4621                 goto err_clear;
4622
4623         err = ieee80211_auth(sdata);
4624         if (err) {
4625                 sta_info_destroy_addr(sdata, req->bss->bssid);
4626                 goto err_clear;
4627         }
4628
4629         /* hold our own reference */
4630         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4631         return 0;
4632
4633  err_clear:
4634         eth_zero_addr(ifmgd->bssid);
4635         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4636         ifmgd->auth_data = NULL;
4637         mutex_lock(&sdata->local->mtx);
4638         ieee80211_vif_release_channel(sdata);
4639         mutex_unlock(&sdata->local->mtx);
4640  err_free:
4641         kfree(auth_data);
4642         return err;
4643 }
4644
4645 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4646                         struct cfg80211_assoc_request *req)
4647 {
4648         struct ieee80211_local *local = sdata->local;
4649         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4650         struct ieee80211_bss *bss = (void *)req->bss->priv;
4651         struct ieee80211_mgd_assoc_data *assoc_data;
4652         const struct cfg80211_bss_ies *beacon_ies;
4653         struct ieee80211_supported_band *sband;
4654         const u8 *ssidie, *ht_ie, *vht_ie;
4655         int i, err;
4656         bool override = false;
4657
4658         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4659         if (!assoc_data)
4660                 return -ENOMEM;
4661
4662         rcu_read_lock();
4663         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4664         if (!ssidie) {
4665                 rcu_read_unlock();
4666                 kfree(assoc_data);
4667                 return -EINVAL;
4668         }
4669         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4670         assoc_data->ssid_len = ssidie[1];
4671         rcu_read_unlock();
4672
4673         if (ifmgd->associated) {
4674                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4675
4676                 sdata_info(sdata,
4677                            "disconnect from AP %pM for new assoc to %pM\n",
4678                            ifmgd->associated->bssid, req->bss->bssid);
4679                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4680                                        WLAN_REASON_UNSPECIFIED,
4681                                        false, frame_buf);
4682
4683                 ieee80211_report_disconnect(sdata, frame_buf,
4684                                             sizeof(frame_buf), true,
4685                                             WLAN_REASON_UNSPECIFIED);
4686         }
4687
4688         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4689                 err = -EBUSY;
4690                 goto err_free;
4691         }
4692
4693         if (ifmgd->assoc_data) {
4694                 err = -EBUSY;
4695                 goto err_free;
4696         }
4697
4698         if (ifmgd->auth_data) {
4699                 bool match;
4700
4701                 /* keep sta info, bssid if matching */
4702                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4703                 ieee80211_destroy_auth_data(sdata, match);
4704         }
4705
4706         /* prepare assoc data */
4707
4708         ifmgd->beacon_crc_valid = false;
4709
4710         assoc_data->wmm = bss->wmm_used &&
4711                           (local->hw.queues >= IEEE80211_NUM_ACS);
4712
4713         /*
4714          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4715          * We still associate in non-HT mode (11a/b/g) if any one of these
4716          * ciphers is configured as pairwise.
4717          * We can set this to true for non-11n hardware, that'll be checked
4718          * separately along with the peer capabilities.
4719          */
4720         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4721                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4722                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4723                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4724                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4725                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4726                         netdev_info(sdata->dev,
4727                                     "disabling HT/VHT due to WEP/TKIP use\n");
4728                 }
4729         }
4730
4731         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4732         sband = local->hw.wiphy->bands[req->bss->channel->band];
4733         if (!sband->ht_cap.ht_supported ||
4734             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4735             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4736                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4737                 if (!bss->wmm_used &&
4738                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4739                         netdev_info(sdata->dev,
4740                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4741         }
4742
4743         /* disable VHT if we don't support it or the AP doesn't use WMM */
4744         if (!sband->vht_cap.vht_supported ||
4745             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4746             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4747                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4748                 if (!bss->wmm_used &&
4749                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4750                         netdev_info(sdata->dev,
4751                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4752         }
4753
4754         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4755         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4756                sizeof(ifmgd->ht_capa_mask));
4757
4758         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4759         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4760                sizeof(ifmgd->vht_capa_mask));
4761
4762         if (req->ie && req->ie_len) {
4763                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4764                 assoc_data->ie_len = req->ie_len;
4765         }
4766
4767         if (req->fils_kek) {
4768                 /* should already be checked in cfg80211 - so warn */
4769                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4770                         err = -EINVAL;
4771                         goto err_free;
4772                 }
4773                 memcpy(assoc_data->fils_kek, req->fils_kek,
4774                        req->fils_kek_len);
4775                 assoc_data->fils_kek_len = req->fils_kek_len;
4776         }
4777
4778         if (req->fils_nonces)
4779                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4780                        2 * FILS_NONCE_LEN);
4781
4782         assoc_data->bss = req->bss;
4783
4784         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4785                 if (ifmgd->powersave)
4786                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4787                 else
4788                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4789         } else
4790                 sdata->smps_mode = ifmgd->req_smps;
4791
4792         assoc_data->capability = req->bss->capability;
4793         assoc_data->supp_rates = bss->supp_rates;
4794         assoc_data->supp_rates_len = bss->supp_rates_len;
4795
4796         rcu_read_lock();
4797         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4798         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4799                 assoc_data->ap_ht_param =
4800                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4801         else
4802                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4803         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4804         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4805                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4806                        sizeof(struct ieee80211_vht_cap));
4807         else
4808                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4809         rcu_read_unlock();
4810
4811         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4812                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4813              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4814                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4815
4816         if (bss->wmm_used && bss->uapsd_supported &&
4817             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4818                 assoc_data->uapsd = true;
4819                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4820         } else {
4821                 assoc_data->uapsd = false;
4822                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4823         }
4824
4825         if (req->prev_bssid)
4826                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4827
4828         if (req->use_mfp) {
4829                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4830                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4831         } else {
4832                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4833                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4834         }
4835
4836         if (req->flags & ASSOC_REQ_USE_RRM)
4837                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4838         else
4839                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4840
4841         if (req->crypto.control_port)
4842                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4843         else
4844                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4845
4846         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4847         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4848         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4849                                                         sdata->vif.type);
4850
4851         /* kick off associate process */
4852
4853         ifmgd->assoc_data = assoc_data;
4854         ifmgd->dtim_period = 0;
4855         ifmgd->have_beacon = false;
4856
4857         /* override HT/VHT configuration only if the AP and we support it */
4858         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4859                 struct ieee80211_sta_ht_cap sta_ht_cap;
4860
4861                 if (req->flags & ASSOC_REQ_DISABLE_HT)
4862                         override = true;
4863
4864                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4865                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4866
4867                 /* check for 40 MHz disable override */
4868                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4869                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4870                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4871                         override = true;
4872
4873                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4874                     req->flags & ASSOC_REQ_DISABLE_VHT)
4875                         override = true;
4876         }
4877
4878         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4879                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4880                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4881         }
4882
4883         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4884                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4885
4886         err = ieee80211_prep_connection(sdata, req->bss, true, override);
4887         if (err)
4888                 goto err_clear;
4889
4890         rcu_read_lock();
4891         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4892
4893         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4894             !beacon_ies) {
4895                 /*
4896                  * Wait up to one beacon interval ...
4897                  * should this be more if we miss one?
4898                  */
4899                 sdata_info(sdata, "waiting for beacon from %pM\n",
4900                            ifmgd->bssid);
4901                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4902                 assoc_data->timeout_started = true;
4903                 assoc_data->need_beacon = true;
4904         } else if (beacon_ies) {
4905                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4906                                                     beacon_ies->data,
4907                                                     beacon_ies->len);
4908                 u8 dtim_count = 0;
4909
4910                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4911                         const struct ieee80211_tim_ie *tim;
4912                         tim = (void *)(tim_ie + 2);
4913                         ifmgd->dtim_period = tim->dtim_period;
4914                         dtim_count = tim->dtim_count;
4915                 }
4916                 ifmgd->have_beacon = true;
4917                 assoc_data->timeout = jiffies;
4918                 assoc_data->timeout_started = true;
4919
4920                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4921                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4922                         sdata->vif.bss_conf.sync_device_ts =
4923                                 bss->device_ts_beacon;
4924                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4925                 }
4926         } else {
4927                 assoc_data->timeout = jiffies;
4928                 assoc_data->timeout_started = true;
4929         }
4930         rcu_read_unlock();
4931
4932         run_again(sdata, assoc_data->timeout);
4933
4934         if (bss->corrupt_data) {
4935                 char *corrupt_type = "data";
4936                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4937                         if (bss->corrupt_data &
4938                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4939                                 corrupt_type = "beacon and probe response";
4940                         else
4941                                 corrupt_type = "beacon";
4942                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4943                         corrupt_type = "probe response";
4944                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4945                            corrupt_type);
4946         }
4947
4948         return 0;
4949  err_clear:
4950         eth_zero_addr(ifmgd->bssid);
4951         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4952         ifmgd->assoc_data = NULL;
4953  err_free:
4954         kfree(assoc_data);
4955         return err;
4956 }
4957
4958 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4959                          struct cfg80211_deauth_request *req)
4960 {
4961         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4962         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4963         bool tx = !req->local_state_change;
4964
4965         if (ifmgd->auth_data &&
4966             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4967                 sdata_info(sdata,
4968                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4969                            req->bssid, req->reason_code,
4970                            ieee80211_get_reason_code_string(req->reason_code));
4971
4972                 drv_mgd_prepare_tx(sdata->local, sdata);
4973                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4974                                                IEEE80211_STYPE_DEAUTH,
4975                                                req->reason_code, tx,
4976                                                frame_buf);
4977                 ieee80211_destroy_auth_data(sdata, false);
4978                 ieee80211_report_disconnect(sdata, frame_buf,
4979                                             sizeof(frame_buf), true,
4980                                             req->reason_code);
4981
4982                 return 0;
4983         }
4984
4985         if (ifmgd->assoc_data &&
4986             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4987                 sdata_info(sdata,
4988                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
4989                            req->bssid, req->reason_code,
4990                            ieee80211_get_reason_code_string(req->reason_code));
4991
4992                 drv_mgd_prepare_tx(sdata->local, sdata);
4993                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4994                                                IEEE80211_STYPE_DEAUTH,
4995                                                req->reason_code, tx,
4996                                                frame_buf);
4997                 ieee80211_destroy_assoc_data(sdata, false, true);
4998                 ieee80211_report_disconnect(sdata, frame_buf,
4999                                             sizeof(frame_buf), true,
5000                                             req->reason_code);
5001                 return 0;
5002         }
5003
5004         if (ifmgd->associated &&
5005             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5006                 sdata_info(sdata,
5007                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5008                            req->bssid, req->reason_code,
5009                            ieee80211_get_reason_code_string(req->reason_code));
5010
5011                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5012                                        req->reason_code, tx, frame_buf);
5013                 ieee80211_report_disconnect(sdata, frame_buf,
5014                                             sizeof(frame_buf), true,
5015                                             req->reason_code);
5016                 return 0;
5017         }
5018
5019         return -ENOTCONN;
5020 }
5021
5022 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5023                            struct cfg80211_disassoc_request *req)
5024 {
5025         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5026         u8 bssid[ETH_ALEN];
5027         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5028
5029         /*
5030          * cfg80211 should catch this ... but it's racy since
5031          * we can receive a disassoc frame, process it, hand it
5032          * to cfg80211 while that's in a locked section already
5033          * trying to tell us that the user wants to disconnect.
5034          */
5035         if (ifmgd->associated != req->bss)
5036                 return -ENOLINK;
5037
5038         sdata_info(sdata,
5039                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5040                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5041
5042         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5043         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5044                                req->reason_code, !req->local_state_change,
5045                                frame_buf);
5046
5047         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5048                                     req->reason_code);
5049
5050         return 0;
5051 }
5052
5053 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5054 {
5055         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5056
5057         /*
5058          * Make sure some work items will not run after this,
5059          * they will not do anything but might not have been
5060          * cancelled when disconnecting.
5061          */
5062         cancel_work_sync(&ifmgd->monitor_work);
5063         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5064         cancel_work_sync(&ifmgd->request_smps_work);
5065         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5066         cancel_work_sync(&ifmgd->chswitch_work);
5067         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5068
5069         sdata_lock(sdata);
5070         if (ifmgd->assoc_data) {
5071                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5072                 ieee80211_destroy_assoc_data(sdata, false, false);
5073                 cfg80211_assoc_timeout(sdata->dev, bss);
5074         }
5075         if (ifmgd->auth_data)
5076                 ieee80211_destroy_auth_data(sdata, false);
5077         spin_lock_bh(&ifmgd->teardown_lock);
5078         if (ifmgd->teardown_skb) {
5079                 kfree_skb(ifmgd->teardown_skb);
5080                 ifmgd->teardown_skb = NULL;
5081                 ifmgd->orig_teardown_skb = NULL;
5082         }
5083         spin_unlock_bh(&ifmgd->teardown_lock);
5084         del_timer_sync(&ifmgd->timer);
5085         sdata_unlock(sdata);
5086 }
5087
5088 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5089                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5090                                s32 rssi_level,
5091                                gfp_t gfp)
5092 {
5093         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5094
5095         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5096
5097         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5098 }
5099 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5100
5101 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5102 {
5103         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5104
5105         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5106
5107         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5108 }
5109 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);