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 = (struct ieee80211_mgmt *) skb_put(skb, 24);
 678         memset(mgmt, 0, 24);
 679         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 680         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 681         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 682
 683         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 684                 skb_put(skb, 10);
 685                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 686                                                   IEEE80211_STYPE_REASSOC_REQ);
 687                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 688                 mgmt->u.reassoc_req.listen_interval =
 689                                 cpu_to_le16(local->hw.conf.listen_interval);
 690                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 691                        ETH_ALEN);
 692         } else {
 693                 skb_put(skb, 4);
 694                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 695                                                   IEEE80211_STYPE_ASSOC_REQ);
 696                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 697                 mgmt->u.assoc_req.listen_interval =
 698                                 cpu_to_le16(local->hw.conf.listen_interval);
 699         }
 700
 701         /* SSID */
 702         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 703         *pos++ = WLAN_EID_SSID;
 704         *pos++ = assoc_data->ssid_len;
 705         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 706
 707         /* add all rates which were marked to be used above */
 708         supp_rates_len = rates_len;
 709         if (supp_rates_len > 8)
 710                 supp_rates_len = 8;
 711
 712         pos = skb_put(skb, supp_rates_len + 2);
 713         *pos++ = WLAN_EID_SUPP_RATES;
 714         *pos++ = supp_rates_len;
 715
 716         count = 0;
 717         for (i = 0; i < sband->n_bitrates; i++) {
 718                 if (BIT(i) & rates) {
 719                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 720                                                 5 * (1 << shift));
 721                         *pos++ = (u8) rate;
 722                         if (++count == 8)
 723                                 break;
 724                 }
 725         }
 726
 727         if (rates_len > count) {
 728                 pos = skb_put(skb, rates_len - count + 2);
 729                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 730                 *pos++ = rates_len - count;
 731
 732                 for (i++; i < sband->n_bitrates; i++) {
 733                         if (BIT(i) & rates) {
 734                                 int rate;
 735                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 736                                                     5 * (1 << shift));
 737                                 *pos++ = (u8) rate;
 738                         }
 739                 }
 740         }
 741
 742         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 743             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 744                 pos = skb_put(skb, 4);
 745                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 746                 *pos++ = 2;
 747                 *pos++ = 0; /* min tx power */
 748                  /* max tx power */
 749                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 750         }
 751
 752         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 753                 /* TODO: get this in reg domain format */
 754                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 755                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 756                 *pos++ = 2 * sband->n_channels;
 757                 for (i = 0; i < sband->n_channels; i++) {
 758                         *pos++ = ieee80211_frequency_to_channel(
 759                                         sband->channels[i].center_freq);
 760                         *pos++ = 1; /* one channel in the subband*/
 761                 }
 762         }
 763
 764         /* if present, add any custom IEs that go before HT */
 765         if (assoc_data->ie_len) {
 766                 static const u8 before_ht[] = {
 767                         WLAN_EID_SSID,
 768                         WLAN_EID_SUPP_RATES,
 769                         WLAN_EID_EXT_SUPP_RATES,
 770                         WLAN_EID_PWR_CAPABILITY,
 771                         WLAN_EID_SUPPORTED_CHANNELS,
 772                         WLAN_EID_RSN,
 773                         WLAN_EID_QOS_CAPA,
 774                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 775                         WLAN_EID_MOBILITY_DOMAIN,
 776                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 777                         WLAN_EID_RIC_DATA,              /* reassoc only */
 778                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 779                 };
 780                 static const u8 after_ric[] = {
 781                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 782                         WLAN_EID_HT_CAPABILITY,
 783                         WLAN_EID_BSS_COEX_2040,
 784                         WLAN_EID_EXT_CAPABILITY,
 785                         WLAN_EID_QOS_TRAFFIC_CAPA,
 786                         WLAN_EID_TIM_BCAST_REQ,
 787                         WLAN_EID_INTERWORKING,
 788                         /* 60GHz doesn't happen right now */
 789                         WLAN_EID_VHT_CAPABILITY,
 790                         WLAN_EID_OPMODE_NOTIF,
 791                 };
 792
 793                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 794                                                  assoc_data->ie_len,
 795                                                  before_ht,
 796                                                  ARRAY_SIZE(before_ht),
 797                                                  after_ric,
 798                                                  ARRAY_SIZE(after_ric),
 799                                                  offset);
 800                 pos = skb_put(skb, noffset - offset);
 801                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 802                 offset = noffset;
 803         }
 804
 805         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 806                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 807                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 808
 809         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 810                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 811                                     sband, chan, sdata->smps_mode);
 812
 813         /* if present, add any custom IEs that go before VHT */
 814         if (assoc_data->ie_len) {
 815                 static const u8 before_vht[] = {
 816                         WLAN_EID_SSID,
 817                         WLAN_EID_SUPP_RATES,
 818                         WLAN_EID_EXT_SUPP_RATES,
 819                         WLAN_EID_PWR_CAPABILITY,
 820                         WLAN_EID_SUPPORTED_CHANNELS,
 821                         WLAN_EID_RSN,
 822                         WLAN_EID_QOS_CAPA,
 823                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 824                         WLAN_EID_MOBILITY_DOMAIN,
 825                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 826                         WLAN_EID_HT_CAPABILITY,
 827                         WLAN_EID_BSS_COEX_2040,
 828                         WLAN_EID_EXT_CAPABILITY,
 829                         WLAN_EID_QOS_TRAFFIC_CAPA,
 830                         WLAN_EID_TIM_BCAST_REQ,
 831                         WLAN_EID_INTERWORKING,
 832                 };
 833
 834                 /* RIC already taken above, so no need to handle here anymore */
 835                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 836                                              before_vht, ARRAY_SIZE(before_vht),
 837                                              offset);
 838                 pos = skb_put(skb, noffset - offset);
 839                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 840                 offset = noffset;
 841         }
 842
 843         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 844                 ieee80211_add_vht_ie(sdata, skb, sband,
 845                                      &assoc_data->ap_vht_cap);
 846
 847         /* if present, add any custom non-vendor IEs that go after HT */
 848         if (assoc_data->ie_len) {
 849                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 850                                                     assoc_data->ie_len,
 851                                                     offset);
 852                 pos = skb_put(skb, noffset - offset);
 853                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 854                 offset = noffset;
 855         }
 856
 857         if (assoc_data->wmm) {
 858                 if (assoc_data->uapsd) {
 859                         qos_info = ifmgd->uapsd_queues;
 860                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 861                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 862                 } else {
 863                         qos_info = 0;
 864                 }
 865
 866                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 867         }
 868
 869         /* add any remaining custom (i.e. vendor specific here) IEs */
 870         if (assoc_data->ie_len) {
 871                 noffset = assoc_data->ie_len;
 872                 pos = skb_put(skb, noffset - offset);
 873                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 874         }
 875
 876         if (assoc_data->fils_kek_len &&
 877             fils_encrypt_assoc_req(skb, assoc_data) < 0) {
 878                 dev_kfree_skb(skb);
 879                 return;
 880         }
 881
 882         drv_mgd_prepare_tx(local, sdata);
 883
 884         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 885         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 886                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 887                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 888         ieee80211_tx_skb(sdata, skb);
 889 }
 890
 891 void ieee80211_send_pspoll(struct ieee80211_local *local,
 892                            struct ieee80211_sub_if_data *sdata)
 893 {
 894         struct ieee80211_pspoll *pspoll;
 895         struct sk_buff *skb;
 896
 897         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 898         if (!skb)
 899                 return;
 900
 901         pspoll = (struct ieee80211_pspoll *) skb->data;
 902         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 903
 904         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 905         ieee80211_tx_skb(sdata, skb);
 906 }
 907
 908 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 909                              struct ieee80211_sub_if_data *sdata,
 910                              bool powersave)
 911 {
 912         struct sk_buff *skb;
 913         struct ieee80211_hdr_3addr *nullfunc;
 914         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 915
 916         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 917         if (!skb)
 918                 return;
 919
 920         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 921         if (powersave)
 922                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 923
 924         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 925                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 926
 927         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 928                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 929
 930         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 931                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 932
 933         ieee80211_tx_skb(sdata, skb);
 934 }
 935
 936 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 937                                           struct ieee80211_sub_if_data *sdata)
 938 {
 939         struct sk_buff *skb;
 940         struct ieee80211_hdr *nullfunc;
 941         __le16 fc;
 942
 943         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 944                 return;
 945
 946         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 947         if (!skb)
 948                 return;
 949
 950         skb_reserve(skb, local->hw.extra_tx_headroom);
 951
 952         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 953         memset(nullfunc, 0, 30);
 954         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 955                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 956         nullfunc->frame_control = fc;
 957         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 958         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 959         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 960         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 961
 962         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 963         ieee80211_tx_skb(sdata, skb);
 964 }
 965
 966 /* spectrum management related things */
 967 static void ieee80211_chswitch_work(struct work_struct *work)
 968 {
 969         struct ieee80211_sub_if_data *sdata =
 970                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 971         struct ieee80211_local *local = sdata->local;
 972         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 973         int ret;
 974
 975         if (!ieee80211_sdata_running(sdata))
 976                 return;
 977
 978         sdata_lock(sdata);
 979         mutex_lock(&local->mtx);
 980         mutex_lock(&local->chanctx_mtx);
 981
 982         if (!ifmgd->associated)
 983                 goto out;
 984
 985         if (!sdata->vif.csa_active)
 986                 goto out;
 987
 988         /*
 989          * using reservation isn't immediate as it may be deferred until later
 990          * with multi-vif. once reservation is complete it will re-schedule the
 991          * work with no reserved_chanctx so verify chandef to check if it
 992          * completed successfully
 993          */
 994
 995         if (sdata->reserved_chanctx) {
 996                 /*
 997                  * with multi-vif csa driver may call ieee80211_csa_finish()
 998                  * many times while waiting for other interfaces to use their
 999                  * reservations
1000                  */
1001                 if (sdata->reserved_ready)
1002                         goto out;
1003
1004                 ret = ieee80211_vif_use_reserved_context(sdata);
1005                 if (ret) {
1006                         sdata_info(sdata,
1007                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1008                                    ret);
1009                         ieee80211_queue_work(&sdata->local->hw,
1010                                              &ifmgd->csa_connection_drop_work);
1011                         goto out;
1012                 }
1013
1014                 goto out;
1015         }
1016
1017         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1018                                         &sdata->csa_chandef)) {
1019                 sdata_info(sdata,
1020                            "failed to finalize channel switch, disconnecting\n");
1021                 ieee80211_queue_work(&sdata->local->hw,
1022                                      &ifmgd->csa_connection_drop_work);
1023                 goto out;
1024         }
1025
1026         /* XXX: shouldn't really modify cfg80211-owned data! */
1027         ifmgd->associated->channel = sdata->csa_chandef.chan;
1028
1029         ifmgd->csa_waiting_bcn = true;
1030
1031         ieee80211_sta_reset_beacon_monitor(sdata);
1032         ieee80211_sta_reset_conn_monitor(sdata);
1033
1034 out:
1035         mutex_unlock(&local->chanctx_mtx);
1036         mutex_unlock(&local->mtx);
1037         sdata_unlock(sdata);
1038 }
1039
1040 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1041 {
1042         struct ieee80211_local *local = sdata->local;
1043         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1044         int ret;
1045
1046         sdata_assert_lock(sdata);
1047
1048         WARN_ON(!sdata->vif.csa_active);
1049
1050         if (sdata->csa_block_tx) {
1051                 ieee80211_wake_vif_queues(local, sdata,
1052                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1053                 sdata->csa_block_tx = false;
1054         }
1055
1056         sdata->vif.csa_active = false;
1057         ifmgd->csa_waiting_bcn = false;
1058
1059         ret = drv_post_channel_switch(sdata);
1060         if (ret) {
1061                 sdata_info(sdata,
1062                            "driver post channel switch failed, disconnecting\n");
1063                 ieee80211_queue_work(&local->hw,
1064                                      &ifmgd->csa_connection_drop_work);
1065                 return;
1066         }
1067
1068         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1069 }
1070
1071 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1072 {
1073         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1074         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1075
1076         trace_api_chswitch_done(sdata, success);
1077         if (!success) {
1078                 sdata_info(sdata,
1079                            "driver channel switch failed, disconnecting\n");
1080                 ieee80211_queue_work(&sdata->local->hw,
1081                                      &ifmgd->csa_connection_drop_work);
1082         } else {
1083                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1084         }
1085 }
1086 EXPORT_SYMBOL(ieee80211_chswitch_done);
1087
1088 static void ieee80211_chswitch_timer(unsigned long data)
1089 {
1090         struct ieee80211_sub_if_data *sdata =
1091                 (struct ieee80211_sub_if_data *) data;
1092
1093         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1094 }
1095
1096 static void
1097 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1098                                  u64 timestamp, u32 device_timestamp,
1099                                  struct ieee802_11_elems *elems,
1100                                  bool beacon)
1101 {
1102         struct ieee80211_local *local = sdata->local;
1103         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1104         struct cfg80211_bss *cbss = ifmgd->associated;
1105         struct ieee80211_chanctx_conf *conf;
1106         struct ieee80211_chanctx *chanctx;
1107         enum nl80211_band current_band;
1108         struct ieee80211_csa_ie csa_ie;
1109         struct ieee80211_channel_switch ch_switch;
1110         int res;
1111
1112         sdata_assert_lock(sdata);
1113
1114         if (!cbss)
1115                 return;
1116
1117         if (local->scanning)
1118                 return;
1119
1120         /* disregard subsequent announcements if we are already processing */
1121         if (sdata->vif.csa_active)
1122                 return;
1123
1124         current_band = cbss->channel->band;
1125         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1126                                            ifmgd->flags,
1127                                            ifmgd->associated->bssid, &csa_ie);
1128         if (res < 0)
1129                 ieee80211_queue_work(&local->hw,
1130                                      &ifmgd->csa_connection_drop_work);
1131         if (res)
1132                 return;
1133
1134         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1135                                      IEEE80211_CHAN_DISABLED)) {
1136                 sdata_info(sdata,
1137                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1138                            ifmgd->associated->bssid,
1139                            csa_ie.chandef.chan->center_freq,
1140                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1141                            csa_ie.chandef.center_freq2);
1142                 ieee80211_queue_work(&local->hw,
1143                                      &ifmgd->csa_connection_drop_work);
1144                 return;
1145         }
1146
1147         if (cfg80211_chandef_identical(&csa_ie.chandef,
1148                                        &sdata->vif.bss_conf.chandef)) {
1149                 if (ifmgd->csa_ignored_same_chan)
1150                         return;
1151                 sdata_info(sdata,
1152                            "AP %pM tries to chanswitch to same channel, ignore\n",
1153                            ifmgd->associated->bssid);
1154                 ifmgd->csa_ignored_same_chan = true;
1155                 return;
1156         }
1157
1158         /*
1159          * Drop all TDLS peers - either we disconnect or move to a different
1160          * channel from this point on. There's no telling what our peer will do.
1161          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1162          * have an incompatible wider chandef.
1163          */
1164         ieee80211_teardown_tdls_peers(sdata);
1165
1166         mutex_lock(&local->mtx);
1167         mutex_lock(&local->chanctx_mtx);
1168         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1169                                          lockdep_is_held(&local->chanctx_mtx));
1170         if (!conf) {
1171                 sdata_info(sdata,
1172                            "no channel context assigned to vif?, disconnecting\n");
1173                 goto drop_connection;
1174         }
1175
1176         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1177
1178         if (local->use_chanctx &&
1179             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1180                 sdata_info(sdata,
1181                            "driver doesn't support chan-switch with channel contexts\n");
1182                 goto drop_connection;
1183         }
1184
1185         ch_switch.timestamp = timestamp;
1186         ch_switch.device_timestamp = device_timestamp;
1187         ch_switch.block_tx = csa_ie.mode;
1188         ch_switch.chandef = csa_ie.chandef;
1189         ch_switch.count = csa_ie.count;
1190
1191         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1192                 sdata_info(sdata,
1193                            "preparing for channel switch failed, disconnecting\n");
1194                 goto drop_connection;
1195         }
1196
1197         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1198                                             chanctx->mode, false);
1199         if (res) {
1200                 sdata_info(sdata,
1201                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1202                            res);
1203                 goto drop_connection;
1204         }
1205         mutex_unlock(&local->chanctx_mtx);
1206
1207         sdata->vif.csa_active = true;
1208         sdata->csa_chandef = csa_ie.chandef;
1209         sdata->csa_block_tx = csa_ie.mode;
1210         ifmgd->csa_ignored_same_chan = false;
1211
1212         if (sdata->csa_block_tx)
1213                 ieee80211_stop_vif_queues(local, sdata,
1214                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1215         mutex_unlock(&local->mtx);
1216
1217         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1218                                           csa_ie.count);
1219
1220         if (local->ops->channel_switch) {
1221                 /* use driver's channel switch callback */
1222                 drv_channel_switch(local, sdata, &ch_switch);
1223                 return;
1224         }
1225
1226         /* channel switch handled in software */
1227         if (csa_ie.count <= 1)
1228                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1229         else
1230                 mod_timer(&ifmgd->chswitch_timer,
1231                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1232                                          cbss->beacon_interval));
1233         return;
1234  drop_connection:
1235         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1236         mutex_unlock(&local->chanctx_mtx);
1237         mutex_unlock(&local->mtx);
1238 }
1239
1240 static bool
1241 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1242                                  struct ieee80211_channel *channel,
1243                                  const u8 *country_ie, u8 country_ie_len,
1244                                  const u8 *pwr_constr_elem,
1245                                  int *chan_pwr, int *pwr_reduction)
1246 {
1247         struct ieee80211_country_ie_triplet *triplet;
1248         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1249         int i, chan_increment;
1250         bool have_chan_pwr = false;
1251
1252         /* Invalid IE */
1253         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1254                 return false;
1255
1256         triplet = (void *)(country_ie + 3);
1257         country_ie_len -= 3;
1258
1259         switch (channel->band) {
1260         default:
1261                 WARN_ON_ONCE(1);
1262                 /* fall through */
1263         case NL80211_BAND_2GHZ:
1264         case NL80211_BAND_60GHZ:
1265                 chan_increment = 1;
1266                 break;
1267         case NL80211_BAND_5GHZ:
1268                 chan_increment = 4;
1269                 break;
1270         }
1271
1272         /* find channel */
1273         while (country_ie_len >= 3) {
1274                 u8 first_channel = triplet->chans.first_channel;
1275
1276                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1277                         goto next;
1278
1279                 for (i = 0; i < triplet->chans.num_channels; i++) {
1280                         if (first_channel + i * chan_increment == chan) {
1281                                 have_chan_pwr = true;
1282                                 *chan_pwr = triplet->chans.max_power;
1283                                 break;
1284                         }
1285                 }
1286                 if (have_chan_pwr)
1287                         break;
1288
1289  next:
1290                 triplet++;
1291                 country_ie_len -= 3;
1292         }
1293
1294         if (have_chan_pwr && pwr_constr_elem)
1295                 *pwr_reduction = *pwr_constr_elem;
1296         else
1297                 *pwr_reduction = 0;
1298
1299         return have_chan_pwr;
1300 }
1301
1302 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1303                                       struct ieee80211_channel *channel,
1304                                       const u8 *cisco_dtpc_ie,
1305                                       int *pwr_level)
1306 {
1307         /* From practical testing, the first data byte of the DTPC element
1308          * seems to contain the requested dBm level, and the CLI on Cisco
1309          * APs clearly state the range is -127 to 127 dBm, which indicates
1310          * a signed byte, although it seemingly never actually goes negative.
1311          * The other byte seems to always be zero.
1312          */
1313         *pwr_level = (__s8)cisco_dtpc_ie[4];
1314 }
1315
1316 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1317                                        struct ieee80211_channel *channel,
1318                                        struct ieee80211_mgmt *mgmt,
1319                                        const u8 *country_ie, u8 country_ie_len,
1320                                        const u8 *pwr_constr_ie,
1321                                        const u8 *cisco_dtpc_ie)
1322 {
1323         bool has_80211h_pwr = false, has_cisco_pwr = false;
1324         int chan_pwr = 0, pwr_reduction_80211h = 0;
1325         int pwr_level_cisco, pwr_level_80211h;
1326         int new_ap_level;
1327         __le16 capab = mgmt->u.probe_resp.capab_info;
1328
1329         if (country_ie &&
1330             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1331              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1332                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1333                         sdata, channel, country_ie, country_ie_len,
1334                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1335                 pwr_level_80211h =
1336                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1337         }
1338
1339         if (cisco_dtpc_ie) {
1340                 ieee80211_find_cisco_dtpc(
1341                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1342                 has_cisco_pwr = true;
1343         }
1344
1345         if (!has_80211h_pwr && !has_cisco_pwr)
1346                 return 0;
1347
1348         /* If we have both 802.11h and Cisco DTPC, apply both limits
1349          * by picking the smallest of the two power levels advertised.
1350          */
1351         if (has_80211h_pwr &&
1352             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1353                 new_ap_level = pwr_level_80211h;
1354
1355                 if (sdata->ap_power_level == new_ap_level)
1356                         return 0;
1357
1358                 sdata_dbg(sdata,
1359                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1360                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1361                           sdata->u.mgd.bssid);
1362         } else {  /* has_cisco_pwr is always true here. */
1363                 new_ap_level = pwr_level_cisco;
1364
1365                 if (sdata->ap_power_level == new_ap_level)
1366                         return 0;
1367
1368                 sdata_dbg(sdata,
1369                           "Limiting TX power to %d dBm as advertised by %pM\n",
1370                           pwr_level_cisco, sdata->u.mgd.bssid);
1371         }
1372
1373         sdata->ap_power_level = new_ap_level;
1374         if (__ieee80211_recalc_txpower(sdata))
1375                 return BSS_CHANGED_TXPOWER;
1376         return 0;
1377 }
1378
1379 /* powersave */
1380 static void ieee80211_enable_ps(struct ieee80211_local *local,
1381                                 struct ieee80211_sub_if_data *sdata)
1382 {
1383         struct ieee80211_conf *conf = &local->hw.conf;
1384
1385         /*
1386          * If we are scanning right now then the parameters will
1387          * take effect when scan finishes.
1388          */
1389         if (local->scanning)
1390                 return;
1391
1392         if (conf->dynamic_ps_timeout > 0 &&
1393             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1394                 mod_timer(&local->dynamic_ps_timer, jiffies +
1395                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1396         } else {
1397                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1398                         ieee80211_send_nullfunc(local, sdata, true);
1399
1400                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1401                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1402                         return;
1403
1404                 conf->flags |= IEEE80211_CONF_PS;
1405                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1406         }
1407 }
1408
1409 static void ieee80211_change_ps(struct ieee80211_local *local)
1410 {
1411         struct ieee80211_conf *conf = &local->hw.conf;
1412
1413         if (local->ps_sdata) {
1414                 ieee80211_enable_ps(local, local->ps_sdata);
1415         } else if (conf->flags & IEEE80211_CONF_PS) {
1416                 conf->flags &= ~IEEE80211_CONF_PS;
1417                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1418                 del_timer_sync(&local->dynamic_ps_timer);
1419                 cancel_work_sync(&local->dynamic_ps_enable_work);
1420         }
1421 }
1422
1423 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1424 {
1425         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1426         struct sta_info *sta = NULL;
1427         bool authorized = false;
1428
1429         if (!mgd->powersave)
1430                 return false;
1431
1432         if (mgd->broken_ap)
1433                 return false;
1434
1435         if (!mgd->associated)
1436                 return false;
1437
1438         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1439                 return false;
1440
1441         if (!mgd->have_beacon)
1442                 return false;
1443
1444         rcu_read_lock();
1445         sta = sta_info_get(sdata, mgd->bssid);
1446         if (sta)
1447                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1448         rcu_read_unlock();
1449
1450         return authorized;
1451 }
1452
1453 /* need to hold RTNL or interface lock */
1454 void ieee80211_recalc_ps(struct ieee80211_local *local)
1455 {
1456         struct ieee80211_sub_if_data *sdata, *found = NULL;
1457         int count = 0;
1458         int timeout;
1459
1460         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1461                 local->ps_sdata = NULL;
1462                 return;
1463         }
1464
1465         list_for_each_entry(sdata, &local->interfaces, list) {
1466                 if (!ieee80211_sdata_running(sdata))
1467                         continue;
1468                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1469                         /* If an AP vif is found, then disable PS
1470                          * by setting the count to zero thereby setting
1471                          * ps_sdata to NULL.
1472                          */
1473                         count = 0;
1474                         break;
1475                 }
1476                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1477                         continue;
1478                 found = sdata;
1479                 count++;
1480         }
1481
1482         if (count == 1 && ieee80211_powersave_allowed(found)) {
1483                 u8 dtimper = found->u.mgd.dtim_period;
1484
1485                 timeout = local->dynamic_ps_forced_timeout;
1486                 if (timeout < 0)
1487                         timeout = 100;
1488                 local->hw.conf.dynamic_ps_timeout = timeout;
1489
1490                 /* If the TIM IE is invalid, pretend the value is 1 */
1491                 if (!dtimper)
1492                         dtimper = 1;
1493
1494                 local->hw.conf.ps_dtim_period = dtimper;
1495                 local->ps_sdata = found;
1496         } else {
1497                 local->ps_sdata = NULL;
1498         }
1499
1500         ieee80211_change_ps(local);
1501 }
1502
1503 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1504 {
1505         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1506
1507         if (sdata->vif.bss_conf.ps != ps_allowed) {
1508                 sdata->vif.bss_conf.ps = ps_allowed;
1509                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1510         }
1511 }
1512
1513 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1514 {
1515         struct ieee80211_local *local =
1516                 container_of(work, struct ieee80211_local,
1517                              dynamic_ps_disable_work);
1518
1519         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1520                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1521                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1522         }
1523
1524         ieee80211_wake_queues_by_reason(&local->hw,
1525                                         IEEE80211_MAX_QUEUE_MAP,
1526                                         IEEE80211_QUEUE_STOP_REASON_PS,
1527                                         false);
1528 }
1529
1530 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1531 {
1532         struct ieee80211_local *local =
1533                 container_of(work, struct ieee80211_local,
1534                              dynamic_ps_enable_work);
1535         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1536         struct ieee80211_if_managed *ifmgd;
1537         unsigned long flags;
1538         int q;
1539
1540         /* can only happen when PS was just disabled anyway */
1541         if (!sdata)
1542                 return;
1543
1544         ifmgd = &sdata->u.mgd;
1545
1546         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1547                 return;
1548
1549         if (local->hw.conf.dynamic_ps_timeout > 0) {
1550                 /* don't enter PS if TX frames are pending */
1551                 if (drv_tx_frames_pending(local)) {
1552                         mod_timer(&local->dynamic_ps_timer, jiffies +
1553                                   msecs_to_jiffies(
1554                                   local->hw.conf.dynamic_ps_timeout));
1555                         return;
1556                 }
1557
1558                 /*
1559                  * transmission can be stopped by others which leads to
1560                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1561                  * is not the actual idle state.
1562                  */
1563                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1564                 for (q = 0; q < local->hw.queues; q++) {
1565                         if (local->queue_stop_reasons[q]) {
1566                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1567                                                        flags);
1568                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1569                                           msecs_to_jiffies(
1570                                           local->hw.conf.dynamic_ps_timeout));
1571                                 return;
1572                         }
1573                 }
1574                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1575         }
1576
1577         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1578             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1579                 if (drv_tx_frames_pending(local)) {
1580                         mod_timer(&local->dynamic_ps_timer, jiffies +
1581                                   msecs_to_jiffies(
1582                                   local->hw.conf.dynamic_ps_timeout));
1583                 } else {
1584                         ieee80211_send_nullfunc(local, sdata, true);
1585                         /* Flush to get the tx status of nullfunc frame */
1586                         ieee80211_flush_queues(local, sdata, false);
1587                 }
1588         }
1589
1590         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1591               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1592             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1593                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1594                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1595                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1596         }
1597 }
1598
1599 void ieee80211_dynamic_ps_timer(unsigned long data)
1600 {
1601         struct ieee80211_local *local = (void *) data;
1602
1603         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1604 }
1605
1606 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1607 {
1608         struct delayed_work *delayed_work = to_delayed_work(work);
1609         struct ieee80211_sub_if_data *sdata =
1610                 container_of(delayed_work, struct ieee80211_sub_if_data,
1611                              dfs_cac_timer_work);
1612         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1613
1614         mutex_lock(&sdata->local->mtx);
1615         if (sdata->wdev.cac_started) {
1616                 ieee80211_vif_release_channel(sdata);
1617                 cfg80211_cac_event(sdata->dev, &chandef,
1618                                    NL80211_RADAR_CAC_FINISHED,
1619                                    GFP_KERNEL);
1620         }
1621         mutex_unlock(&sdata->local->mtx);
1622 }
1623
1624 static bool
1625 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1626 {
1627         struct ieee80211_local *local = sdata->local;
1628         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1629         bool ret = false;
1630         int ac;
1631
1632         if (local->hw.queues < IEEE80211_NUM_ACS)
1633                 return false;
1634
1635         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1636                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1637                 int non_acm_ac;
1638                 unsigned long now = jiffies;
1639
1640                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1641                     tx_tspec->admitted_time &&
1642                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1643                         tx_tspec->consumed_tx_time = 0;
1644                         tx_tspec->time_slice_start = now;
1645
1646                         if (tx_tspec->downgraded)
1647                                 tx_tspec->action =
1648                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1649                 }
1650
1651                 switch (tx_tspec->action) {
1652                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1653                         /* take the original parameters */
1654                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1655                                 sdata_err(sdata,
1656                                           "failed to set TX queue parameters for queue %d\n",
1657                                           ac);
1658                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1659                         tx_tspec->downgraded = false;
1660                         ret = true;
1661                         break;
1662                 case TX_TSPEC_ACTION_DOWNGRADE:
1663                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1664                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1665                                 ret = true;
1666                                 break;
1667                         }
1668                         /* downgrade next lower non-ACM AC */
1669                         for (non_acm_ac = ac + 1;
1670                              non_acm_ac < IEEE80211_NUM_ACS;
1671                              non_acm_ac++)
1672                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1673                                         break;
1674                         /* Usually the loop will result in using BK even if it
1675                          * requires admission control, but such a configuration
1676                          * makes no sense and we have to transmit somehow - the
1677                          * AC selection does the same thing.
1678                          * If we started out trying to downgrade from BK, then
1679                          * the extra condition here might be needed.
1680                          */
1681                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1682                                 non_acm_ac = IEEE80211_AC_BK;
1683                         if (drv_conf_tx(local, sdata, ac,
1684                                         &sdata->tx_conf[non_acm_ac]))
1685                                 sdata_err(sdata,
1686                                           "failed to set TX queue parameters for queue %d\n",
1687                                           ac);
1688                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1689                         ret = true;
1690                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1691                                 tx_tspec->time_slice_start + HZ - now + 1);
1692                         break;
1693                 case TX_TSPEC_ACTION_NONE:
1694                         /* nothing now */
1695                         break;
1696                 }
1697         }
1698
1699         return ret;
1700 }
1701
1702 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1703 {
1704         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1705                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1706 }
1707
1708 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1709 {
1710         struct ieee80211_sub_if_data *sdata;
1711
1712         sdata = container_of(work, struct ieee80211_sub_if_data,
1713                              u.mgd.tx_tspec_wk.work);
1714         ieee80211_sta_handle_tspec_ac_params(sdata);
1715 }
1716
1717 /* MLME */
1718 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1719                                      struct ieee80211_sub_if_data *sdata,
1720                                      const u8 *wmm_param, size_t wmm_param_len)
1721 {
1722         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1723         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1724         size_t left;
1725         int count, ac;
1726         const u8 *pos;
1727         u8 uapsd_queues = 0;
1728
1729         if (!local->ops->conf_tx)
1730                 return false;
1731
1732         if (local->hw.queues < IEEE80211_NUM_ACS)
1733                 return false;
1734
1735         if (!wmm_param)
1736                 return false;
1737
1738         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1739                 return false;
1740
1741         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1742                 uapsd_queues = ifmgd->uapsd_queues;
1743
1744         count = wmm_param[6] & 0x0f;
1745         if (count == ifmgd->wmm_last_param_set)
1746                 return false;
1747         ifmgd->wmm_last_param_set = count;
1748
1749         pos = wmm_param + 8;
1750         left = wmm_param_len - 8;
1751
1752         memset(&params, 0, sizeof(params));
1753
1754         sdata->wmm_acm = 0;
1755         for (; left >= 4; left -= 4, pos += 4) {
1756                 int aci = (pos[0] >> 5) & 0x03;
1757                 int acm = (pos[0] >> 4) & 0x01;
1758                 bool uapsd = false;
1759
1760                 switch (aci) {
1761                 case 1: /* AC_BK */
1762                         ac = IEEE80211_AC_BK;
1763                         if (acm)
1764                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1765                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1766                                 uapsd = true;
1767                         break;
1768                 case 2: /* AC_VI */
1769                         ac = IEEE80211_AC_VI;
1770                         if (acm)
1771                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1772                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1773                                 uapsd = true;
1774                         break;
1775                 case 3: /* AC_VO */
1776                         ac = IEEE80211_AC_VO;
1777                         if (acm)
1778                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1779                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1780                                 uapsd = true;
1781                         break;
1782                 case 0: /* AC_BE */
1783                 default:
1784                         ac = IEEE80211_AC_BE;
1785                         if (acm)
1786                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1787                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1788                                 uapsd = true;
1789                         break;
1790                 }
1791
1792                 params[ac].aifs = pos[0] & 0x0f;
1793
1794                 if (params[ac].aifs < 2) {
1795                         sdata_info(sdata,
1796                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1797                                    params[ac].aifs, aci);
1798                         params[ac].aifs = 2;
1799                 }
1800                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1801                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1802                 params[ac].txop = get_unaligned_le16(pos + 2);
1803                 params[ac].acm = acm;
1804                 params[ac].uapsd = uapsd;
1805
1806                 if (params[ac].cw_min > params[ac].cw_max) {
1807                         sdata_info(sdata,
1808                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1809                                    params[ac].cw_min, params[ac].cw_max, aci);
1810                         return false;
1811                 }
1812         }
1813
1814         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1815                 mlme_dbg(sdata,
1816                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1817                          ac, params[ac].acm,
1818                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1819                          params[ac].txop, params[ac].uapsd,
1820                          ifmgd->tx_tspec[ac].downgraded);
1821                 sdata->tx_conf[ac] = params[ac];
1822                 if (!ifmgd->tx_tspec[ac].downgraded &&
1823                     drv_conf_tx(local, sdata, ac, &params[ac]))
1824                         sdata_err(sdata,
1825                                   "failed to set TX queue parameters for AC %d\n",
1826                                   ac);
1827         }
1828
1829         /* enable WMM or activate new settings */
1830         sdata->vif.bss_conf.qos = true;
1831         return true;
1832 }
1833
1834 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1835 {
1836         lockdep_assert_held(&sdata->local->mtx);
1837
1838         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1839         ieee80211_run_deferred_scan(sdata->local);
1840 }
1841
1842 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1843 {
1844         mutex_lock(&sdata->local->mtx);
1845         __ieee80211_stop_poll(sdata);
1846         mutex_unlock(&sdata->local->mtx);
1847 }
1848
1849 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1850                                            u16 capab, bool erp_valid, u8 erp)
1851 {
1852         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1853         struct ieee80211_supported_band *sband;
1854         u32 changed = 0;
1855         bool use_protection;
1856         bool use_short_preamble;
1857         bool use_short_slot;
1858
1859         sband = ieee80211_get_sband(sdata);
1860         if (!sband)
1861                 return changed;
1862
1863         if (erp_valid) {
1864                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1865                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1866         } else {
1867                 use_protection = false;
1868                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1869         }
1870
1871         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1872         if (sband->band == NL80211_BAND_5GHZ)
1873                 use_short_slot = true;
1874
1875         if (use_protection != bss_conf->use_cts_prot) {
1876                 bss_conf->use_cts_prot = use_protection;
1877                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1878         }
1879
1880         if (use_short_preamble != bss_conf->use_short_preamble) {
1881                 bss_conf->use_short_preamble = use_short_preamble;
1882                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1883         }
1884
1885         if (use_short_slot != bss_conf->use_short_slot) {
1886                 bss_conf->use_short_slot = use_short_slot;
1887                 changed |= BSS_CHANGED_ERP_SLOT;
1888         }
1889
1890         return changed;
1891 }
1892
1893 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1894                                      struct cfg80211_bss *cbss,
1895                                      u32 bss_info_changed)
1896 {
1897         struct ieee80211_bss *bss = (void *)cbss->priv;
1898         struct ieee80211_local *local = sdata->local;
1899         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1900
1901         bss_info_changed |= BSS_CHANGED_ASSOC;
1902         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1903                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1904
1905         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1906                 beacon_loss_count * bss_conf->beacon_int));
1907
1908         sdata->u.mgd.associated = cbss;
1909         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1910
1911         ieee80211_check_rate_mask(sdata);
1912
1913         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1914
1915         if (sdata->vif.p2p ||
1916             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1917                 const struct cfg80211_bss_ies *ies;
1918
1919                 rcu_read_lock();
1920                 ies = rcu_dereference(cbss->ies);
1921                 if (ies) {
1922                         int ret;
1923
1924                         ret = cfg80211_get_p2p_attr(
1925                                         ies->data, ies->len,
1926                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1927                                         (u8 *) &bss_conf->p2p_noa_attr,
1928                                         sizeof(bss_conf->p2p_noa_attr));
1929                         if (ret >= 2) {
1930                                 sdata->u.mgd.p2p_noa_index =
1931                                         bss_conf->p2p_noa_attr.index;
1932                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1933                         }
1934                 }
1935                 rcu_read_unlock();
1936         }
1937
1938         /* just to be sure */
1939         ieee80211_stop_poll(sdata);
1940
1941         ieee80211_led_assoc(local, 1);
1942
1943         if (sdata->u.mgd.have_beacon) {
1944                 /*
1945                  * If the AP is buggy we may get here with no DTIM period
1946                  * known, so assume it's 1 which is the only safe assumption
1947                  * in that case, although if the TIM IE is broken powersave
1948                  * probably just won't work at all.
1949                  */
1950                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1951                 bss_conf->beacon_rate = bss->beacon_rate;
1952                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1953         } else {
1954                 bss_conf->beacon_rate = NULL;
1955                 bss_conf->dtim_period = 0;
1956         }
1957
1958         bss_conf->assoc = 1;
1959
1960         /* Tell the driver to monitor connection quality (if supported) */
1961         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1962             bss_conf->cqm_rssi_thold)
1963                 bss_info_changed |= BSS_CHANGED_CQM;
1964
1965         /* Enable ARP filtering */
1966         if (bss_conf->arp_addr_cnt)
1967                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1968
1969         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1970
1971         mutex_lock(&local->iflist_mtx);
1972         ieee80211_recalc_ps(local);
1973         mutex_unlock(&local->iflist_mtx);
1974
1975         ieee80211_recalc_smps(sdata);
1976         ieee80211_recalc_ps_vif(sdata);
1977
1978         netif_carrier_on(sdata->dev);
1979 }
1980
1981 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1982                                    u16 stype, u16 reason, bool tx,
1983                                    u8 *frame_buf)
1984 {
1985         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1986         struct ieee80211_local *local = sdata->local;
1987         u32 changed = 0;
1988
1989         sdata_assert_lock(sdata);
1990
1991         if (WARN_ON_ONCE(tx && !frame_buf))
1992                 return;
1993
1994         if (WARN_ON(!ifmgd->associated))
1995                 return;
1996
1997         ieee80211_stop_poll(sdata);
1998
1999         ifmgd->associated = NULL;
2000         netif_carrier_off(sdata->dev);
2001
2002         /*
2003          * if we want to get out of ps before disassoc (why?) we have
2004          * to do it before sending disassoc, as otherwise the null-packet
2005          * won't be valid.
2006          */
2007         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2008                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2009                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2010         }
2011         local->ps_sdata = NULL;
2012
2013         /* disable per-vif ps */
2014         ieee80211_recalc_ps_vif(sdata);
2015
2016         /* make sure ongoing transmission finishes */
2017         synchronize_net();
2018
2019         /*
2020          * drop any frame before deauth/disassoc, this can be data or
2021          * management frame. Since we are disconnecting, we should not
2022          * insist sending these frames which can take time and delay
2023          * the disconnection and possible the roaming.
2024          */
2025         if (tx)
2026                 ieee80211_flush_queues(local, sdata, true);
2027
2028         /* deauthenticate/disassociate now */
2029         if (tx || frame_buf)
2030                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2031                                                reason, tx, frame_buf);
2032
2033         /* flush out frame - make sure the deauth was actually sent */
2034         if (tx)
2035                 ieee80211_flush_queues(local, sdata, false);
2036
2037         /* clear bssid only after building the needed mgmt frames */
2038         eth_zero_addr(ifmgd->bssid);
2039
2040         /* remove AP and TDLS peers */
2041         sta_info_flush(sdata);
2042
2043         /* finally reset all BSS / config parameters */
2044         changed |= ieee80211_reset_erp_info(sdata);
2045
2046         ieee80211_led_assoc(local, 0);
2047         changed |= BSS_CHANGED_ASSOC;
2048         sdata->vif.bss_conf.assoc = false;
2049
2050         ifmgd->p2p_noa_index = -1;
2051         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2052                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2053
2054         /* on the next assoc, re-program HT/VHT parameters */
2055         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2056         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2057         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2058         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2059
2060         /* reset MU-MIMO ownership and group data */
2061         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2062                sizeof(sdata->vif.bss_conf.mu_group.membership));
2063         memset(sdata->vif.bss_conf.mu_group.position, 0,
2064                sizeof(sdata->vif.bss_conf.mu_group.position));
2065         changed |= BSS_CHANGED_MU_GROUPS;
2066         sdata->vif.mu_mimo_owner = false;
2067
2068         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2069
2070         del_timer_sync(&local->dynamic_ps_timer);
2071         cancel_work_sync(&local->dynamic_ps_enable_work);
2072
2073         /* Disable ARP filtering */
2074         if (sdata->vif.bss_conf.arp_addr_cnt)
2075                 changed |= BSS_CHANGED_ARP_FILTER;
2076
2077         sdata->vif.bss_conf.qos = false;
2078         changed |= BSS_CHANGED_QOS;
2079
2080         /* The BSSID (not really interesting) and HT changed */
2081         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2082         ieee80211_bss_info_change_notify(sdata, changed);
2083
2084         /* disassociated - set to defaults now */
2085         ieee80211_set_wmm_default(sdata, false, false);
2086
2087         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2088         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2089         del_timer_sync(&sdata->u.mgd.timer);
2090         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2091
2092         sdata->vif.bss_conf.dtim_period = 0;
2093         sdata->vif.bss_conf.beacon_rate = NULL;
2094
2095         ifmgd->have_beacon = false;
2096
2097         ifmgd->flags = 0;
2098         mutex_lock(&local->mtx);
2099         ieee80211_vif_release_channel(sdata);
2100
2101         sdata->vif.csa_active = false;
2102         ifmgd->csa_waiting_bcn = false;
2103         ifmgd->csa_ignored_same_chan = false;
2104         if (sdata->csa_block_tx) {
2105                 ieee80211_wake_vif_queues(local, sdata,
2106                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2107                 sdata->csa_block_tx = false;
2108         }
2109         mutex_unlock(&local->mtx);
2110
2111         /* existing TX TSPEC sessions no longer exist */
2112         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2113         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2114
2115         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2116 }
2117
2118 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2119                              struct ieee80211_hdr *hdr)
2120 {
2121         /*
2122          * We can postpone the mgd.timer whenever receiving unicast frames
2123          * from AP because we know that the connection is working both ways
2124          * at that time. But multicast frames (and hence also beacons) must
2125          * be ignored here, because we need to trigger the timer during
2126          * data idle periods for sending the periodic probe request to the
2127          * AP we're connected to.
2128          */
2129         if (is_multicast_ether_addr(hdr->addr1))
2130                 return;
2131
2132         ieee80211_sta_reset_conn_monitor(sdata);
2133 }
2134
2135 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2136 {
2137         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2138         struct ieee80211_local *local = sdata->local;
2139
2140         mutex_lock(&local->mtx);
2141         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2142                 goto out;
2143
2144         __ieee80211_stop_poll(sdata);
2145
2146         mutex_lock(&local->iflist_mtx);
2147         ieee80211_recalc_ps(local);
2148         mutex_unlock(&local->iflist_mtx);
2149
2150         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2151                 goto out;
2152
2153         /*
2154          * We've received a probe response, but are not sure whether
2155          * we have or will be receiving any beacons or data, so let's
2156          * schedule the timers again, just in case.
2157          */
2158         ieee80211_sta_reset_beacon_monitor(sdata);
2159
2160         mod_timer(&ifmgd->conn_mon_timer,
2161                   round_jiffies_up(jiffies +
2162                                    IEEE80211_CONNECTION_IDLE_TIME));
2163 out:
2164         mutex_unlock(&local->mtx);
2165 }
2166
2167 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2168                                            struct ieee80211_hdr *hdr,
2169                                            u16 tx_time)
2170 {
2171         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2172         u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2173         int ac = ieee80211_ac_from_tid(tid);
2174         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2175         unsigned long now = jiffies;
2176
2177         if (likely(!tx_tspec->admitted_time))
2178                 return;
2179
2180         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2181                 tx_tspec->consumed_tx_time = 0;
2182                 tx_tspec->time_slice_start = now;
2183
2184                 if (tx_tspec->downgraded) {
2185                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2186                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2187                 }
2188         }
2189
2190         if (tx_tspec->downgraded)
2191                 return;
2192
2193         tx_tspec->consumed_tx_time += tx_time;
2194
2195         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2196                 tx_tspec->downgraded = true;
2197                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2198                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2199         }
2200 }
2201
2202 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2203                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2204 {
2205         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2206
2207         if (!ieee80211_is_data(hdr->frame_control))
2208             return;
2209
2210         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2211             sdata->u.mgd.probe_send_count > 0) {
2212                 if (ack)
2213                         ieee80211_sta_reset_conn_monitor(sdata);
2214                 else
2215                         sdata->u.mgd.nullfunc_failed = true;
2216                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2217                 return;
2218         }
2219
2220         if (ack)
2221                 ieee80211_sta_reset_conn_monitor(sdata);
2222 }
2223
2224 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2225 {
2226         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2227         const u8 *ssid;
2228         u8 *dst = ifmgd->associated->bssid;
2229         u8 unicast_limit = max(1, max_probe_tries - 3);
2230         struct sta_info *sta;
2231
2232         /*
2233          * Try sending broadcast probe requests for the last three
2234          * probe requests after the first ones failed since some
2235          * buggy APs only support broadcast probe requests.
2236          */
2237         if (ifmgd->probe_send_count >= unicast_limit)
2238                 dst = NULL;
2239
2240         /*
2241          * When the hardware reports an accurate Tx ACK status, it's
2242          * better to send a nullfunc frame instead of a probe request,
2243          * as it will kick us off the AP quickly if we aren't associated
2244          * anymore. The timeout will be reset if the frame is ACKed by
2245          * the AP.
2246          */
2247         ifmgd->probe_send_count++;
2248
2249         if (dst) {
2250                 mutex_lock(&sdata->local->sta_mtx);
2251                 sta = sta_info_get(sdata, dst);
2252                 if (!WARN_ON(!sta))
2253                         ieee80211_check_fast_rx(sta);
2254                 mutex_unlock(&sdata->local->sta_mtx);
2255         }
2256
2257         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2258                 ifmgd->nullfunc_failed = false;
2259                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2260         } else {
2261                 int ssid_len;
2262
2263                 rcu_read_lock();
2264                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2265                 if (WARN_ON_ONCE(ssid == NULL))
2266                         ssid_len = 0;
2267                 else
2268                         ssid_len = ssid[1];
2269
2270                 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2271                                          ssid + 2, ssid_len, NULL,
2272                                          0, (u32) -1, true, 0,
2273                                          ifmgd->associated->channel, false);
2274                 rcu_read_unlock();
2275         }
2276
2277         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2278         run_again(sdata, ifmgd->probe_timeout);
2279 }
2280
2281 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2282                                    bool beacon)
2283 {
2284         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2285         bool already = false;
2286
2287         if (!ieee80211_sdata_running(sdata))
2288                 return;
2289
2290         sdata_lock(sdata);
2291
2292         if (!ifmgd->associated)
2293                 goto out;
2294
2295         mutex_lock(&sdata->local->mtx);
2296
2297         if (sdata->local->tmp_channel || sdata->local->scanning) {
2298                 mutex_unlock(&sdata->local->mtx);
2299                 goto out;
2300         }
2301
2302         if (beacon) {
2303                 mlme_dbg_ratelimited(sdata,
2304                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2305                                      beacon_loss_count);
2306
2307                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2308         }
2309
2310         /*
2311          * The driver/our work has already reported this event or the
2312          * connection monitoring has kicked in and we have already sent
2313          * a probe request. Or maybe the AP died and the driver keeps
2314          * reporting until we disassociate...
2315          *
2316          * In either case we have to ignore the current call to this
2317          * function (except for setting the correct probe reason bit)
2318          * because otherwise we would reset the timer every time and
2319          * never check whether we received a probe response!
2320          */
2321         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2322                 already = true;
2323
2324         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2325
2326         mutex_unlock(&sdata->local->mtx);
2327
2328         if (already)
2329                 goto out;
2330
2331         mutex_lock(&sdata->local->iflist_mtx);
2332         ieee80211_recalc_ps(sdata->local);
2333         mutex_unlock(&sdata->local->iflist_mtx);
2334
2335         ifmgd->probe_send_count = 0;
2336         ieee80211_mgd_probe_ap_send(sdata);
2337  out:
2338         sdata_unlock(sdata);
2339 }
2340
2341 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2342                                           struct ieee80211_vif *vif)
2343 {
2344         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2345         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2346         struct cfg80211_bss *cbss;
2347         struct sk_buff *skb;
2348         const u8 *ssid;
2349         int ssid_len;
2350
2351         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2352                 return NULL;
2353
2354         sdata_assert_lock(sdata);
2355
2356         if (ifmgd->associated)
2357                 cbss = ifmgd->associated;
2358         else if (ifmgd->auth_data)
2359                 cbss = ifmgd->auth_data->bss;
2360         else if (ifmgd->assoc_data)
2361                 cbss = ifmgd->assoc_data->bss;
2362         else
2363                 return NULL;
2364
2365         rcu_read_lock();
2366         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2367         if (WARN_ON_ONCE(ssid == NULL))
2368                 ssid_len = 0;
2369         else
2370                 ssid_len = ssid[1];
2371
2372         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2373                                         (u32) -1, cbss->channel,
2374                                         ssid + 2, ssid_len,
2375                                         NULL, 0, true);
2376         rcu_read_unlock();
2377
2378         return skb;
2379 }
2380 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2381
2382 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2383                                         const u8 *buf, size_t len, bool tx,
2384                                         u16 reason)
2385 {
2386         struct ieee80211_event event = {
2387                 .type = MLME_EVENT,
2388                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2389                 .u.mlme.reason = reason,
2390         };
2391
2392         if (tx)
2393                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2394         else
2395                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2396
2397         drv_event_callback(sdata->local, sdata, &event);
2398 }
2399
2400 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2401 {
2402         struct ieee80211_local *local = sdata->local;
2403         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2404         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2405
2406         sdata_lock(sdata);
2407         if (!ifmgd->associated) {
2408                 sdata_unlock(sdata);
2409                 return;
2410         }
2411
2412         /* AP is probably out of range (or not reachable for another reason) so
2413          * remove the bss struct for that AP.
2414          */
2415         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2416
2417         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2418                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2419                                true, frame_buf);
2420         mutex_lock(&local->mtx);
2421         sdata->vif.csa_active = false;
2422         ifmgd->csa_waiting_bcn = false;
2423         if (sdata->csa_block_tx) {
2424                 ieee80211_wake_vif_queues(local, sdata,
2425                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2426                 sdata->csa_block_tx = false;
2427         }
2428         mutex_unlock(&local->mtx);
2429
2430         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2431                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2432
2433         sdata_unlock(sdata);
2434 }
2435
2436 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2437 {
2438         struct ieee80211_sub_if_data *sdata =
2439                 container_of(work, struct ieee80211_sub_if_data,
2440                              u.mgd.beacon_connection_loss_work);
2441         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2442
2443         if (ifmgd->associated)
2444                 ifmgd->beacon_loss_count++;
2445
2446         if (ifmgd->connection_loss) {
2447                 sdata_info(sdata, "Connection to AP %pM lost\n",
2448                            ifmgd->bssid);
2449                 __ieee80211_disconnect(sdata);
2450         } else {
2451                 ieee80211_mgd_probe_ap(sdata, true);
2452         }
2453 }
2454
2455 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2456 {
2457         struct ieee80211_sub_if_data *sdata =
2458                 container_of(work, struct ieee80211_sub_if_data,
2459                              u.mgd.csa_connection_drop_work);
2460
2461         __ieee80211_disconnect(sdata);
2462 }
2463
2464 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2465 {
2466         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2467         struct ieee80211_hw *hw = &sdata->local->hw;
2468
2469         trace_api_beacon_loss(sdata);
2470
2471         sdata->u.mgd.connection_loss = false;
2472         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2473 }
2474 EXPORT_SYMBOL(ieee80211_beacon_loss);
2475
2476 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2477 {
2478         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2479         struct ieee80211_hw *hw = &sdata->local->hw;
2480
2481         trace_api_connection_loss(sdata);
2482
2483         sdata->u.mgd.connection_loss = true;
2484         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2485 }
2486 EXPORT_SYMBOL(ieee80211_connection_loss);
2487
2488
2489 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2490                                         bool assoc)
2491 {
2492         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2493
2494         sdata_assert_lock(sdata);
2495
2496         if (!assoc) {
2497                 /*
2498                  * we are not authenticated yet, the only timer that could be
2499                  * running is the timeout for the authentication response which
2500                  * which is not relevant anymore.
2501                  */
2502                 del_timer_sync(&sdata->u.mgd.timer);
2503                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2504
2505                 eth_zero_addr(sdata->u.mgd.bssid);
2506                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2507                 sdata->u.mgd.flags = 0;
2508                 mutex_lock(&sdata->local->mtx);
2509                 ieee80211_vif_release_channel(sdata);
2510                 mutex_unlock(&sdata->local->mtx);
2511         }
2512
2513         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2514         kfree(auth_data);
2515         sdata->u.mgd.auth_data = NULL;
2516 }
2517
2518 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2519                                          bool assoc, bool abandon)
2520 {
2521         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2522
2523         sdata_assert_lock(sdata);
2524
2525         if (!assoc) {
2526                 /*
2527                  * we are not associated yet, the only timer that could be
2528                  * running is the timeout for the association response which
2529                  * which is not relevant anymore.
2530                  */
2531                 del_timer_sync(&sdata->u.mgd.timer);
2532                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2533
2534                 eth_zero_addr(sdata->u.mgd.bssid);
2535                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2536                 sdata->u.mgd.flags = 0;
2537                 sdata->vif.mu_mimo_owner = false;
2538
2539                 mutex_lock(&sdata->local->mtx);
2540                 ieee80211_vif_release_channel(sdata);
2541                 mutex_unlock(&sdata->local->mtx);
2542
2543                 if (abandon)
2544                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2545         }
2546
2547         kfree(assoc_data);
2548         sdata->u.mgd.assoc_data = NULL;
2549 }
2550
2551 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2552                                      struct ieee80211_mgmt *mgmt, size_t len)
2553 {
2554         struct ieee80211_local *local = sdata->local;
2555         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2556         u8 *pos;
2557         struct ieee802_11_elems elems;
2558         u32 tx_flags = 0;
2559
2560         pos = mgmt->u.auth.variable;
2561         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2562         if (!elems.challenge)
2563                 return;
2564         auth_data->expected_transaction = 4;
2565         drv_mgd_prepare_tx(sdata->local, sdata);
2566         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2567                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2568                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2569         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2570                             elems.challenge - 2, elems.challenge_len + 2,
2571                             auth_data->bss->bssid, auth_data->bss->bssid,
2572                             auth_data->key, auth_data->key_len,
2573                             auth_data->key_idx, tx_flags);
2574 }
2575
2576 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2577                                    struct ieee80211_mgmt *mgmt, size_t len)
2578 {
2579         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2580         u8 bssid[ETH_ALEN];
2581         u16 auth_alg, auth_transaction, status_code;
2582         struct sta_info *sta;
2583         struct ieee80211_event event = {
2584                 .type = MLME_EVENT,
2585                 .u.mlme.data = AUTH_EVENT,
2586         };
2587
2588         sdata_assert_lock(sdata);
2589
2590         if (len < 24 + 6)
2591                 return;
2592
2593         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2594                 return;
2595
2596         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2597
2598         if (!ether_addr_equal(bssid, mgmt->bssid))
2599                 return;
2600
2601         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2602         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2603         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2604
2605         if (auth_alg != ifmgd->auth_data->algorithm ||
2606             auth_transaction != ifmgd->auth_data->expected_transaction) {
2607                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2608                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2609                            auth_transaction,
2610                            ifmgd->auth_data->expected_transaction);
2611                 return;
2612         }
2613
2614         if (status_code != WLAN_STATUS_SUCCESS) {
2615                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2616                            mgmt->sa, status_code);
2617                 ieee80211_destroy_auth_data(sdata, false);
2618                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2619                 event.u.mlme.status = MLME_DENIED;
2620                 event.u.mlme.reason = status_code;
2621                 drv_event_callback(sdata->local, sdata, &event);
2622                 return;
2623         }
2624
2625         switch (ifmgd->auth_data->algorithm) {
2626         case WLAN_AUTH_OPEN:
2627         case WLAN_AUTH_LEAP:
2628         case WLAN_AUTH_FT:
2629         case WLAN_AUTH_SAE:
2630         case WLAN_AUTH_FILS_SK:
2631         case WLAN_AUTH_FILS_SK_PFS:
2632         case WLAN_AUTH_FILS_PK:
2633                 break;
2634         case WLAN_AUTH_SHARED_KEY:
2635                 if (ifmgd->auth_data->expected_transaction != 4) {
2636                         ieee80211_auth_challenge(sdata, mgmt, len);
2637                         /* need another frame */
2638                         return;
2639                 }
2640                 break;
2641         default:
2642                 WARN_ONCE(1, "invalid auth alg %d",
2643                           ifmgd->auth_data->algorithm);
2644                 return;
2645         }
2646
2647         event.u.mlme.status = MLME_SUCCESS;
2648         drv_event_callback(sdata->local, sdata, &event);
2649         sdata_info(sdata, "authenticated\n");
2650         ifmgd->auth_data->done = true;
2651         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2652         ifmgd->auth_data->timeout_started = true;
2653         run_again(sdata, ifmgd->auth_data->timeout);
2654
2655         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2656             ifmgd->auth_data->expected_transaction != 2) {
2657                 /*
2658                  * Report auth frame to user space for processing since another
2659                  * round of Authentication frames is still needed.
2660                  */
2661                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2662                 return;
2663         }
2664
2665         /* move station state to auth */
2666         mutex_lock(&sdata->local->sta_mtx);
2667         sta = sta_info_get(sdata, bssid);
2668         if (!sta) {
2669                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2670                 goto out_err;
2671         }
2672         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2673                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2674                 goto out_err;
2675         }
2676         mutex_unlock(&sdata->local->sta_mtx);
2677
2678         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2679         return;
2680  out_err:
2681         mutex_unlock(&sdata->local->sta_mtx);
2682         /* ignore frame -- wait for timeout */
2683 }
2684
2685 #define case_WLAN(type) \
2686         case WLAN_REASON_##type: return #type
2687
2688 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2689 {
2690         switch (reason_code) {
2691         case_WLAN(UNSPECIFIED);
2692         case_WLAN(PREV_AUTH_NOT_VALID);
2693         case_WLAN(DEAUTH_LEAVING);
2694         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2695         case_WLAN(DISASSOC_AP_BUSY);
2696         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2697         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2698         case_WLAN(DISASSOC_STA_HAS_LEFT);
2699         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2700         case_WLAN(DISASSOC_BAD_POWER);
2701         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2702         case_WLAN(INVALID_IE);
2703         case_WLAN(MIC_FAILURE);
2704         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2705         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2706         case_WLAN(IE_DIFFERENT);
2707         case_WLAN(INVALID_GROUP_CIPHER);
2708         case_WLAN(INVALID_PAIRWISE_CIPHER);
2709         case_WLAN(INVALID_AKMP);
2710         case_WLAN(UNSUPP_RSN_VERSION);
2711         case_WLAN(INVALID_RSN_IE_CAP);
2712         case_WLAN(IEEE8021X_FAILED);
2713         case_WLAN(CIPHER_SUITE_REJECTED);
2714         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2715         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2716         case_WLAN(DISASSOC_LOW_ACK);
2717         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2718         case_WLAN(QSTA_LEAVE_QBSS);
2719         case_WLAN(QSTA_NOT_USE);
2720         case_WLAN(QSTA_REQUIRE_SETUP);
2721         case_WLAN(QSTA_TIMEOUT);
2722         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2723         case_WLAN(MESH_PEER_CANCELED);
2724         case_WLAN(MESH_MAX_PEERS);
2725         case_WLAN(MESH_CONFIG);
2726         case_WLAN(MESH_CLOSE);
2727         case_WLAN(MESH_MAX_RETRIES);
2728         case_WLAN(MESH_CONFIRM_TIMEOUT);
2729         case_WLAN(MESH_INVALID_GTK);
2730         case_WLAN(MESH_INCONSISTENT_PARAM);
2731         case_WLAN(MESH_INVALID_SECURITY);
2732         case_WLAN(MESH_PATH_ERROR);
2733         case_WLAN(MESH_PATH_NOFORWARD);
2734         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2735         case_WLAN(MAC_EXISTS_IN_MBSS);
2736         case_WLAN(MESH_CHAN_REGULATORY);
2737         case_WLAN(MESH_CHAN);
2738         default: return "<unknown>";
2739         }
2740 }
2741
2742 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2743                                      struct ieee80211_mgmt *mgmt, size_t len)
2744 {
2745         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2746         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2747
2748         sdata_assert_lock(sdata);
2749
2750         if (len < 24 + 2)
2751                 return;
2752
2753         if (ifmgd->associated &&
2754             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2755                 const u8 *bssid = ifmgd->associated->bssid;
2756
2757                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2758                            bssid, reason_code,
2759                            ieee80211_get_reason_code_string(reason_code));
2760
2761                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2762
2763                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2764                                             reason_code);
2765                 return;
2766         }
2767
2768         if (ifmgd->assoc_data &&
2769             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2770                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2771
2772                 sdata_info(sdata,
2773                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2774                            bssid, reason_code,
2775                            ieee80211_get_reason_code_string(reason_code));
2776
2777                 ieee80211_destroy_assoc_data(sdata, false, true);
2778
2779                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2780                 return;
2781         }
2782 }
2783
2784
2785 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2786                                        struct ieee80211_mgmt *mgmt, size_t len)
2787 {
2788         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2789         u16 reason_code;
2790
2791         sdata_assert_lock(sdata);
2792
2793         if (len < 24 + 2)
2794                 return;
2795
2796         if (!ifmgd->associated ||
2797             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2798                 return;
2799
2800         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2801
2802         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2803                    mgmt->sa, reason_code,
2804                    ieee80211_get_reason_code_string(reason_code));
2805
2806         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2807
2808         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2809 }
2810
2811 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2812                                 u8 *supp_rates, unsigned int supp_rates_len,
2813                                 u32 *rates, u32 *basic_rates,
2814                                 bool *have_higher_than_11mbit,
2815                                 int *min_rate, int *min_rate_index,
2816                                 int shift)
2817 {
2818         int i, j;
2819
2820         for (i = 0; i < supp_rates_len; i++) {
2821                 int rate = supp_rates[i] & 0x7f;
2822                 bool is_basic = !!(supp_rates[i] & 0x80);
2823
2824                 if ((rate * 5 * (1 << shift)) > 110)
2825                         *have_higher_than_11mbit = true;
2826
2827                 /*
2828                  * Skip HT and VHT BSS membership selectors since they're not
2829                  * rates.
2830                  *
2831                  * Note: Even though the membership selector and the basic
2832                  *       rate flag share the same bit, they are not exactly
2833                  *       the same.
2834                  */
2835                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
2836                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
2837                         continue;
2838
2839                 for (j = 0; j < sband->n_bitrates; j++) {
2840                         struct ieee80211_rate *br;
2841                         int brate;
2842
2843                         br = &sband->bitrates[j];
2844
2845                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2846                         if (brate == rate) {
2847                                 *rates |= BIT(j);
2848                                 if (is_basic)
2849                                         *basic_rates |= BIT(j);
2850                                 if ((rate * 5) < *min_rate) {
2851                                         *min_rate = rate * 5;
2852                                         *min_rate_index = j;
2853                                 }
2854                                 break;
2855                         }
2856                 }
2857         }
2858 }
2859
2860 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2861                                     struct cfg80211_bss *cbss,
2862                                     struct ieee80211_mgmt *mgmt, size_t len)
2863 {
2864         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2865         struct ieee80211_local *local = sdata->local;
2866         struct ieee80211_supported_band *sband;
2867         struct sta_info *sta;
2868         u8 *pos;
2869         u16 capab_info, aid;
2870         struct ieee802_11_elems elems;
2871         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2872         const struct cfg80211_bss_ies *bss_ies = NULL;
2873         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2874         u32 changed = 0;
2875         int err;
2876         bool ret;
2877
2878         /* AssocResp and ReassocResp have identical structure */
2879
2880         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2881         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2882
2883         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2884                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2885                            aid);
2886         aid &= ~(BIT(15) | BIT(14));
2887
2888         ifmgd->broken_ap = false;
2889
2890         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2891                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2892                            aid);
2893                 aid = 0;
2894                 ifmgd->broken_ap = true;
2895         }
2896
2897         pos = mgmt->u.assoc_resp.variable;
2898         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2899
2900         if (!elems.supp_rates) {
2901                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2902                 return false;
2903         }
2904
2905         ifmgd->aid = aid;
2906         ifmgd->tdls_chan_switch_prohibited =
2907                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2908                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2909
2910         /*
2911          * Some APs are erroneously not including some information in their
2912          * (re)association response frames. Try to recover by using the data
2913          * from the beacon or probe response. This seems to afflict mobile
2914          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2915          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2916          */
2917         if ((assoc_data->wmm && !elems.wmm_param) ||
2918             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2919              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2920             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2921              (!elems.vht_cap_elem || !elems.vht_operation))) {
2922                 const struct cfg80211_bss_ies *ies;
2923                 struct ieee802_11_elems bss_elems;
2924
2925                 rcu_read_lock();
2926                 ies = rcu_dereference(cbss->ies);
2927                 if (ies)
2928                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2929                                           GFP_ATOMIC);
2930                 rcu_read_unlock();
2931                 if (!bss_ies)
2932                         return false;
2933
2934                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2935                                        false, &bss_elems);
2936                 if (assoc_data->wmm &&
2937                     !elems.wmm_param && bss_elems.wmm_param) {
2938                         elems.wmm_param = bss_elems.wmm_param;
2939                         sdata_info(sdata,
2940                                    "AP bug: WMM param missing from AssocResp\n");
2941                 }
2942
2943                 /*
2944                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2945                  * have to include the IEs in the (re)association response.
2946                  */
2947                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2948                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2949                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2950                         sdata_info(sdata,
2951                                    "AP bug: HT capability missing from AssocResp\n");
2952                 }
2953                 if (!elems.ht_operation && bss_elems.ht_operation &&
2954                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2955                         elems.ht_operation = bss_elems.ht_operation;
2956                         sdata_info(sdata,
2957                                    "AP bug: HT operation missing from AssocResp\n");
2958                 }
2959                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2960                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2961                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2962                         sdata_info(sdata,
2963                                    "AP bug: VHT capa missing from AssocResp\n");
2964                 }
2965                 if (!elems.vht_operation && bss_elems.vht_operation &&
2966                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2967                         elems.vht_operation = bss_elems.vht_operation;
2968                         sdata_info(sdata,
2969                                    "AP bug: VHT operation missing from AssocResp\n");
2970                 }
2971         }
2972
2973         /*
2974          * We previously checked these in the beacon/probe response, so
2975          * they should be present here. This is just a safety net.
2976          */
2977         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2978             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2979                 sdata_info(sdata,
2980                            "HT AP is missing WMM params or HT capability/operation\n");
2981                 ret = false;
2982                 goto out;
2983         }
2984
2985         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2986             (!elems.vht_cap_elem || !elems.vht_operation)) {
2987                 sdata_info(sdata,
2988                            "VHT AP is missing VHT capability/operation\n");
2989                 ret = false;
2990                 goto out;
2991         }
2992
2993         mutex_lock(&sdata->local->sta_mtx);
2994         /*
2995          * station info was already allocated and inserted before
2996          * the association and should be available to us
2997          */
2998         sta = sta_info_get(sdata, cbss->bssid);
2999         if (WARN_ON(!sta)) {
3000                 mutex_unlock(&sdata->local->sta_mtx);
3001                 ret = false;
3002                 goto out;
3003         }
3004
3005         sband = ieee80211_get_sband(sdata);
3006         if (!sband) {
3007                 mutex_unlock(&sdata->local->sta_mtx);
3008                 ret = false;
3009                 goto out;
3010         }
3011
3012         /* Set up internal HT/VHT capabilities */
3013         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3014                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3015                                                   elems.ht_cap_elem, sta);
3016
3017         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3018                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3019                                                     elems.vht_cap_elem, sta);
3020
3021         /*
3022          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3023          * in their association response, so ignore that data for our own
3024          * configuration. If it changed since the last beacon, we'll get the
3025          * next beacon and update then.
3026          */
3027
3028         /*
3029          * If an operating mode notification IE is present, override the
3030          * NSS calculation (that would be done in rate_control_rate_init())
3031          * and use the # of streams from that element.
3032          */
3033         if (elems.opmode_notif &&
3034             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3035                 u8 nss;
3036
3037                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3038                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3039                 nss += 1;
3040                 sta->sta.rx_nss = nss;
3041         }
3042
3043         rate_control_rate_init(sta);
3044
3045         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3046                 set_sta_flag(sta, WLAN_STA_MFP);
3047                 sta->sta.mfp = true;
3048         } else {
3049                 sta->sta.mfp = false;
3050         }
3051
3052         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3053
3054         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3055         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3056                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3057         if (err) {
3058                 sdata_info(sdata,
3059                            "failed to move station %pM to desired state\n",
3060                            sta->sta.addr);
3061                 WARN_ON(__sta_info_destroy(sta));
3062                 mutex_unlock(&sdata->local->sta_mtx);
3063                 ret = false;
3064                 goto out;
3065         }
3066
3067         mutex_unlock(&sdata->local->sta_mtx);
3068
3069         /*
3070          * Always handle WMM once after association regardless
3071          * of the first value the AP uses. Setting -1 here has
3072          * that effect because the AP values is an unsigned
3073          * 4-bit value.
3074          */
3075         ifmgd->wmm_last_param_set = -1;
3076
3077         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3078                 ieee80211_set_wmm_default(sdata, false, false);
3079         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3080                                              elems.wmm_param_len)) {
3081                 /* still enable QoS since we might have HT/VHT */
3082                 ieee80211_set_wmm_default(sdata, false, true);
3083                 /* set the disable-WMM flag in this case to disable
3084                  * tracking WMM parameter changes in the beacon if
3085                  * the parameters weren't actually valid. Doing so
3086                  * avoids changing parameters very strangely when
3087                  * the AP is going back and forth between valid and
3088                  * invalid parameters.
3089                  */
3090                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3091         }
3092         changed |= BSS_CHANGED_QOS;
3093
3094         if (elems.max_idle_period_ie) {
3095                 bss_conf->max_idle_period =
3096                         le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3097                 bss_conf->protected_keep_alive =
3098                         !!(elems.max_idle_period_ie->idle_options &
3099                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3100                 changed |= BSS_CHANGED_KEEP_ALIVE;
3101         } else {
3102                 bss_conf->max_idle_period = 0;
3103                 bss_conf->protected_keep_alive = false;
3104         }
3105
3106         /* set AID and assoc capability,
3107          * ieee80211_set_associated() will tell the driver */
3108         bss_conf->aid = aid;
3109         bss_conf->assoc_capability = capab_info;
3110         ieee80211_set_associated(sdata, cbss, changed);
3111
3112         /*
3113          * If we're using 4-addr mode, let the AP know that we're
3114          * doing so, so that it can create the STA VLAN on its side
3115          */
3116         if (ifmgd->use_4addr)
3117                 ieee80211_send_4addr_nullfunc(local, sdata);
3118
3119         /*
3120          * Start timer to probe the connection to the AP now.
3121          * Also start the timer that will detect beacon loss.
3122          */
3123         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3124         ieee80211_sta_reset_beacon_monitor(sdata);
3125
3126         ret = true;
3127  out:
3128         kfree(bss_ies);
3129         return ret;
3130 }
3131
3132 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3133                                          struct ieee80211_mgmt *mgmt,
3134                                          size_t len)
3135 {
3136         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3137         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3138         u16 capab_info, status_code, aid;
3139         struct ieee802_11_elems elems;
3140         int ac, uapsd_queues = -1;
3141         u8 *pos;
3142         bool reassoc;
3143         struct cfg80211_bss *bss;
3144         struct ieee80211_event event = {
3145                 .type = MLME_EVENT,
3146                 .u.mlme.data = ASSOC_EVENT,
3147         };
3148
3149         sdata_assert_lock(sdata);
3150
3151         if (!assoc_data)
3152                 return;
3153         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3154                 return;
3155
3156         /*
3157          * AssocResp and ReassocResp have identical structure, so process both
3158          * of them in this function.
3159          */
3160
3161         if (len < 24 + 6)
3162                 return;
3163
3164         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3165         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3166         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3167         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3168
3169         sdata_info(sdata,
3170                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3171                    reassoc ? "Rea" : "A", mgmt->sa,
3172                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3173
3174         if (assoc_data->fils_kek_len &&
3175             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3176                 return;
3177
3178         pos = mgmt->u.assoc_resp.variable;
3179         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3180
3181         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3182             elems.timeout_int &&
3183             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3184                 u32 tu, ms;
3185                 tu = le32_to_cpu(elems.timeout_int->value);
3186                 ms = tu * 1024 / 1000;
3187                 sdata_info(sdata,
3188                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3189                            mgmt->sa, tu, ms);
3190                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3191                 assoc_data->timeout_started = true;
3192                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3193                         run_again(sdata, assoc_data->timeout);
3194                 return;
3195         }
3196
3197         bss = assoc_data->bss;
3198
3199         if (status_code != WLAN_STATUS_SUCCESS) {
3200                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3201                            mgmt->sa, status_code);
3202                 ieee80211_destroy_assoc_data(sdata, false, false);
3203                 event.u.mlme.status = MLME_DENIED;
3204                 event.u.mlme.reason = status_code;
3205                 drv_event_callback(sdata->local, sdata, &event);
3206         } else {
3207                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3208                         /* oops -- internal error -- send timeout for now */
3209                         ieee80211_destroy_assoc_data(sdata, false, false);
3210                         cfg80211_assoc_timeout(sdata->dev, bss);
3211                         return;
3212                 }
3213                 event.u.mlme.status = MLME_SUCCESS;
3214                 drv_event_callback(sdata->local, sdata, &event);
3215                 sdata_info(sdata, "associated\n");
3216
3217                 /*
3218                  * destroy assoc_data afterwards, as otherwise an idle
3219                  * recalc after assoc_data is NULL but before associated
3220                  * is set can cause the interface to go idle
3221                  */
3222                 ieee80211_destroy_assoc_data(sdata, true, false);
3223
3224                 /* get uapsd queues configuration */
3225                 uapsd_queues = 0;
3226                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3227                         if (sdata->tx_conf[ac].uapsd)
3228                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3229         }
3230
3231         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3232 }
3233
3234 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3235                                   struct ieee80211_mgmt *mgmt, size_t len,
3236                                   struct ieee80211_rx_status *rx_status,
3237                                   struct ieee802_11_elems *elems)
3238 {
3239         struct ieee80211_local *local = sdata->local;
3240         struct ieee80211_bss *bss;
3241         struct ieee80211_channel *channel;
3242
3243         sdata_assert_lock(sdata);
3244
3245         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3246         if (!channel)
3247                 return;
3248
3249         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3250                                         channel);
3251         if (bss) {
3252                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3253                 ieee80211_rx_bss_put(local, bss);
3254         }
3255 }
3256
3257
3258 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3259                                          struct sk_buff *skb)
3260 {
3261         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3262         struct ieee80211_if_managed *ifmgd;
3263         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3264         size_t baselen, len = skb->len;
3265         struct ieee802_11_elems elems;
3266
3267         ifmgd = &sdata->u.mgd;
3268
3269         sdata_assert_lock(sdata);
3270
3271         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3272                 return; /* ignore ProbeResp to foreign address */
3273
3274         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3275         if (baselen > len)
3276                 return;
3277
3278         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3279                                false, &elems);
3280
3281         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3282
3283         if (ifmgd->associated &&
3284             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3285                 ieee80211_reset_ap_probe(sdata);
3286 }
3287
3288 /*
3289  * This is the canonical list of information elements we care about,
3290  * the filter code also gives us all changes to the Microsoft OUI
3291  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3292  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3293  * changes to requested client power.
3294  *
3295  * We implement beacon filtering in software since that means we can
3296  * avoid processing the frame here and in cfg80211, and userspace
3297  * will not be able to tell whether the hardware supports it or not.
3298  *
3299  * XXX: This list needs to be dynamic -- userspace needs to be able to
3300  *      add items it requires. It also needs to be able to tell us to
3301  *      look out for other vendor IEs.
3302  */
3303 static const u64 care_about_ies =
3304         (1ULL << WLAN_EID_COUNTRY) |
3305         (1ULL << WLAN_EID_ERP_INFO) |
3306         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3307         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3308         (1ULL << WLAN_EID_HT_CAPABILITY) |
3309         (1ULL << WLAN_EID_HT_OPERATION) |
3310         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3311
3312 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3313                                      struct ieee80211_mgmt *mgmt, size_t len,
3314                                      struct ieee80211_rx_status *rx_status)
3315 {
3316         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3317         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3318         size_t baselen;
3319         struct ieee802_11_elems elems;
3320         struct ieee80211_local *local = sdata->local;
3321         struct ieee80211_chanctx_conf *chanctx_conf;
3322         struct ieee80211_channel *chan;
3323         struct sta_info *sta;
3324         u32 changed = 0;
3325         bool erp_valid;
3326         u8 erp_value = 0;
3327         u32 ncrc;
3328         u8 *bssid;
3329         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3330
3331         sdata_assert_lock(sdata);
3332
3333         /* Process beacon from the current BSS */
3334         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3335         if (baselen > len)
3336                 return;
3337
3338         rcu_read_lock();
3339         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3340         if (!chanctx_conf) {
3341                 rcu_read_unlock();
3342                 return;
3343         }
3344
3345         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3346                 rcu_read_unlock();
3347                 return;
3348         }
3349         chan = chanctx_conf->def.chan;
3350         rcu_read_unlock();
3351
3352         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3353             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3354                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3355                                        len - baselen, false, &elems);
3356
3357                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3358                 if (elems.tim && !elems.parse_error) {
3359                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3360                         ifmgd->dtim_period = tim_ie->dtim_period;
3361                 }
3362                 ifmgd->have_beacon = true;
3363                 ifmgd->assoc_data->need_beacon = false;
3364                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3365                         sdata->vif.bss_conf.sync_tsf =
3366                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3367                         sdata->vif.bss_conf.sync_device_ts =
3368                                 rx_status->device_timestamp;
3369                         if (elems.tim)
3370                                 sdata->vif.bss_conf.sync_dtim_count =
3371                                         elems.tim->dtim_count;
3372                         else
3373                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3374                 }
3375                 /* continue assoc process */
3376                 ifmgd->assoc_data->timeout = jiffies;
3377                 ifmgd->assoc_data->timeout_started = true;
3378                 run_again(sdata, ifmgd->assoc_data->timeout);
3379                 return;
3380         }
3381
3382         if (!ifmgd->associated ||
3383             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3384                 return;
3385         bssid = ifmgd->associated->bssid;
3386
3387         /* Track average RSSI from the Beacon frames of the current AP */
3388         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3389                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3390                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3391                 ifmgd->last_cqm_event_signal = 0;
3392                 ifmgd->count_beacon_signal = 1;
3393                 ifmgd->last_ave_beacon_signal = 0;
3394         } else {
3395                 ifmgd->count_beacon_signal++;
3396         }
3397
3398         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3399
3400         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3401             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3402                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3403                 int last_sig = ifmgd->last_ave_beacon_signal;
3404                 struct ieee80211_event event = {
3405                         .type = RSSI_EVENT,
3406                 };
3407
3408                 /*
3409                  * if signal crosses either of the boundaries, invoke callback
3410                  * with appropriate parameters
3411                  */
3412                 if (sig > ifmgd->rssi_max_thold &&
3413                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3414                         ifmgd->last_ave_beacon_signal = sig;
3415                         event.u.rssi.data = RSSI_EVENT_HIGH;
3416                         drv_event_callback(local, sdata, &event);
3417                 } else if (sig < ifmgd->rssi_min_thold &&
3418                            (last_sig >= ifmgd->rssi_max_thold ||
3419                            last_sig == 0)) {
3420                         ifmgd->last_ave_beacon_signal = sig;
3421                         event.u.rssi.data = RSSI_EVENT_LOW;
3422                         drv_event_callback(local, sdata, &event);
3423                 }
3424         }
3425
3426         if (bss_conf->cqm_rssi_thold &&
3427             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3428             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3429                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3430                 int last_event = ifmgd->last_cqm_event_signal;
3431                 int thold = bss_conf->cqm_rssi_thold;
3432                 int hyst = bss_conf->cqm_rssi_hyst;
3433
3434                 if (sig < thold &&
3435                     (last_event == 0 || sig < last_event - hyst)) {
3436                         ifmgd->last_cqm_event_signal = sig;
3437                         ieee80211_cqm_rssi_notify(
3438                                 &sdata->vif,
3439                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3440                                 sig, GFP_KERNEL);
3441                 } else if (sig > thold &&
3442                            (last_event == 0 || sig > last_event + hyst)) {
3443                         ifmgd->last_cqm_event_signal = sig;
3444                         ieee80211_cqm_rssi_notify(
3445                                 &sdata->vif,
3446                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3447                                 sig, GFP_KERNEL);
3448                 }
3449         }
3450
3451         if (bss_conf->cqm_rssi_low &&
3452             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3453                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3454                 int last_event = ifmgd->last_cqm_event_signal;
3455                 int low = bss_conf->cqm_rssi_low;
3456                 int high = bss_conf->cqm_rssi_high;
3457
3458                 if (sig < low &&
3459                     (last_event == 0 || last_event >= low)) {
3460                         ifmgd->last_cqm_event_signal = sig;
3461                         ieee80211_cqm_rssi_notify(
3462                                 &sdata->vif,
3463                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3464                                 sig, GFP_KERNEL);
3465                 } else if (sig > high &&
3466                            (last_event == 0 || last_event <= high)) {
3467                         ifmgd->last_cqm_event_signal = sig;
3468                         ieee80211_cqm_rssi_notify(
3469                                 &sdata->vif,
3470                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3471                                 sig, GFP_KERNEL);
3472                 }
3473         }
3474
3475         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3476                 mlme_dbg_ratelimited(sdata,
3477                                      "cancelling AP probe due to a received beacon\n");
3478                 ieee80211_reset_ap_probe(sdata);
3479         }
3480
3481         /*
3482          * Push the beacon loss detection into the future since
3483          * we are processing a beacon from the AP just now.
3484          */
3485         ieee80211_sta_reset_beacon_monitor(sdata);
3486
3487         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3488         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3489                                           len - baselen, false, &elems,
3490                                           care_about_ies, ncrc);
3491
3492         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3493             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3494                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3495                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3496                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3497                                 ieee80211_hw_config(local,
3498                                                     IEEE80211_CONF_CHANGE_PS);
3499                         }
3500                         ieee80211_send_nullfunc(local, sdata, false);
3501                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3502                         local->pspolling = true;
3503
3504                         /*
3505                          * Here is assumed that the driver will be
3506                          * able to send ps-poll frame and receive a
3507                          * response even though power save mode is
3508                          * enabled, but some drivers might require
3509                          * to disable power save here. This needs
3510                          * to be investigated.
3511                          */
3512                         ieee80211_send_pspoll(local, sdata);
3513                 }
3514         }
3515
3516         if (sdata->vif.p2p ||
3517             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3518                 struct ieee80211_p2p_noa_attr noa = {};
3519                 int ret;
3520
3521                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3522                                             len - baselen,
3523                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3524                                             (u8 *) &noa, sizeof(noa));
3525                 if (ret >= 2) {
3526                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3527                                 /* valid noa_attr and index changed */
3528                                 sdata->u.mgd.p2p_noa_index = noa.index;
3529                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3530                                 changed |= BSS_CHANGED_P2P_PS;
3531                                 /*
3532                                  * make sure we update all information, the CRC
3533                                  * mechanism doesn't look at P2P attributes.
3534                                  */
3535                                 ifmgd->beacon_crc_valid = false;
3536                         }
3537                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3538                         /* noa_attr not found and we had valid noa_attr before */
3539                         sdata->u.mgd.p2p_noa_index = -1;
3540                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3541                         changed |= BSS_CHANGED_P2P_PS;
3542                         ifmgd->beacon_crc_valid = false;
3543                 }
3544         }
3545
3546         if (ifmgd->csa_waiting_bcn)
3547                 ieee80211_chswitch_post_beacon(sdata);
3548
3549         /*
3550          * Update beacon timing and dtim count on every beacon appearance. This
3551          * will allow the driver to use the most updated values. Do it before
3552          * comparing this one with last received beacon.
3553          * IMPORTANT: These parameters would possibly be out of sync by the time
3554          * the driver will use them. The synchronized view is currently
3555          * guaranteed only in certain callbacks.
3556          */
3557         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3558                 sdata->vif.bss_conf.sync_tsf =
3559                         le64_to_cpu(mgmt->u.beacon.timestamp);
3560                 sdata->vif.bss_conf.sync_device_ts =
3561                         rx_status->device_timestamp;
3562                 if (elems.tim)
3563                         sdata->vif.bss_conf.sync_dtim_count =
3564                                 elems.tim->dtim_count;
3565                 else
3566                         sdata->vif.bss_conf.sync_dtim_count = 0;
3567         }
3568
3569         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3570                 return;
3571         ifmgd->beacon_crc = ncrc;
3572         ifmgd->beacon_crc_valid = true;
3573
3574         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3575
3576         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3577                                          rx_status->device_timestamp,
3578                                          &elems, true);
3579
3580         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3581             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3582                                      elems.wmm_param_len))
3583                 changed |= BSS_CHANGED_QOS;
3584
3585         /*
3586          * If we haven't had a beacon before, tell the driver about the
3587          * DTIM period (and beacon timing if desired) now.
3588          */
3589         if (!ifmgd->have_beacon) {
3590                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3591                 if (elems.tim)
3592                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3593                 else
3594                         bss_conf->dtim_period = 1;
3595
3596                 changed |= BSS_CHANGED_BEACON_INFO;
3597                 ifmgd->have_beacon = true;
3598
3599                 mutex_lock(&local->iflist_mtx);
3600                 ieee80211_recalc_ps(local);
3601                 mutex_unlock(&local->iflist_mtx);
3602
3603                 ieee80211_recalc_ps_vif(sdata);
3604         }
3605
3606         if (elems.erp_info) {
3607                 erp_valid = true;
3608                 erp_value = elems.erp_info[0];
3609         } else {
3610                 erp_valid = false;
3611         }
3612         changed |= ieee80211_handle_bss_capability(sdata,
3613                         le16_to_cpu(mgmt->u.beacon.capab_info),
3614                         erp_valid, erp_value);
3615
3616         mutex_lock(&local->sta_mtx);
3617         sta = sta_info_get(sdata, bssid);
3618
3619         if (ieee80211_config_bw(sdata, sta,
3620                                 elems.ht_cap_elem, elems.ht_operation,
3621                                 elems.vht_operation, bssid, &changed)) {
3622                 mutex_unlock(&local->sta_mtx);
3623                 sdata_info(sdata,
3624                            "failed to follow AP %pM bandwidth change, disconnect\n",
3625                            bssid);
3626                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3627                                        WLAN_REASON_DEAUTH_LEAVING,
3628                                        true, deauth_buf);
3629                 ieee80211_report_disconnect(sdata, deauth_buf,
3630                                             sizeof(deauth_buf), true,
3631                                             WLAN_REASON_DEAUTH_LEAVING);
3632                 return;
3633         }
3634
3635         if (sta && elems.opmode_notif)
3636                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3637                                             rx_status->band);
3638         mutex_unlock(&local->sta_mtx);
3639
3640         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3641                                                elems.country_elem,
3642                                                elems.country_elem_len,
3643                                                elems.pwr_constr_elem,
3644                                                elems.cisco_dtpc_elem);
3645
3646         ieee80211_bss_info_change_notify(sdata, changed);
3647 }
3648
3649 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3650                                   struct sk_buff *skb)
3651 {
3652         struct ieee80211_rx_status *rx_status;
3653         struct ieee80211_mgmt *mgmt;
3654         u16 fc;
3655         struct ieee802_11_elems elems;
3656         int ies_len;
3657
3658         rx_status = (struct ieee80211_rx_status *) skb->cb;
3659         mgmt = (struct ieee80211_mgmt *) skb->data;
3660         fc = le16_to_cpu(mgmt->frame_control);
3661
3662         sdata_lock(sdata);
3663
3664         switch (fc & IEEE80211_FCTL_STYPE) {
3665         case IEEE80211_STYPE_BEACON:
3666                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3667                 break;
3668         case IEEE80211_STYPE_PROBE_RESP:
3669                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3670                 break;
3671         case IEEE80211_STYPE_AUTH:
3672                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3673                 break;
3674         case IEEE80211_STYPE_DEAUTH:
3675                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3676                 break;
3677         case IEEE80211_STYPE_DISASSOC:
3678                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3679                 break;
3680         case IEEE80211_STYPE_ASSOC_RESP:
3681         case IEEE80211_STYPE_REASSOC_RESP:
3682                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3683                 break;
3684         case IEEE80211_STYPE_ACTION:
3685                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3686                         ies_len = skb->len -
3687                                   offsetof(struct ieee80211_mgmt,
3688                                            u.action.u.chan_switch.variable);
3689
3690                         if (ies_len < 0)
3691                                 break;
3692
3693                         ieee802_11_parse_elems(
3694                                 mgmt->u.action.u.chan_switch.variable,
3695                                 ies_len, true, &elems);
3696
3697                         if (elems.parse_error)
3698                                 break;
3699
3700                         ieee80211_sta_process_chanswitch(sdata,
3701                                                  rx_status->mactime,
3702                                                  rx_status->device_timestamp,
3703                                                  &elems, false);
3704                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3705                         ies_len = skb->len -
3706                                   offsetof(struct ieee80211_mgmt,
3707                                            u.action.u.ext_chan_switch.variable);
3708
3709                         if (ies_len < 0)
3710                                 break;
3711
3712                         ieee802_11_parse_elems(
3713                                 mgmt->u.action.u.ext_chan_switch.variable,
3714                                 ies_len, true, &elems);
3715
3716                         if (elems.parse_error)
3717                                 break;
3718
3719                         /* for the handling code pretend this was also an IE */
3720                         elems.ext_chansw_ie =
3721                                 &mgmt->u.action.u.ext_chan_switch.data;
3722
3723                         ieee80211_sta_process_chanswitch(sdata,
3724                                                  rx_status->mactime,
3725                                                  rx_status->device_timestamp,
3726                                                  &elems, false);
3727                 }
3728                 break;
3729         }
3730         sdata_unlock(sdata);
3731 }
3732
3733 static void ieee80211_sta_timer(unsigned long data)
3734 {
3735         struct ieee80211_sub_if_data *sdata =
3736                 (struct ieee80211_sub_if_data *) data;
3737
3738         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3739 }
3740
3741 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3742                                           u8 *bssid, u8 reason, bool tx)
3743 {
3744         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3745
3746         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3747                                tx, frame_buf);
3748
3749         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3750                                     reason);
3751 }
3752
3753 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3754 {
3755         struct ieee80211_local *local = sdata->local;
3756         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3757         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3758         u32 tx_flags = 0;
3759         u16 trans = 1;
3760         u16 status = 0;
3761
3762         sdata_assert_lock(sdata);
3763
3764         if (WARN_ON_ONCE(!auth_data))
3765                 return -EINVAL;
3766
3767         auth_data->tries++;
3768
3769         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3770                 sdata_info(sdata, "authentication with %pM timed out\n",
3771                            auth_data->bss->bssid);
3772
3773                 /*
3774                  * Most likely AP is not in the range so remove the
3775                  * bss struct for that AP.
3776                  */
3777                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3778
3779                 return -ETIMEDOUT;
3780         }
3781
3782         drv_mgd_prepare_tx(local, sdata);
3783
3784         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3785                    auth_data->bss->bssid, auth_data->tries,
3786                    IEEE80211_AUTH_MAX_TRIES);
3787
3788         auth_data->expected_transaction = 2;
3789
3790         if (auth_data->algorithm == WLAN_AUTH_SAE) {
3791                 trans = auth_data->sae_trans;
3792                 status = auth_data->sae_status;
3793                 auth_data->expected_transaction = trans;
3794         }
3795
3796         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3797                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3798                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3799
3800         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3801                             auth_data->data, auth_data->data_len,
3802                             auth_data->bss->bssid,
3803                             auth_data->bss->bssid, NULL, 0, 0,
3804                             tx_flags);
3805
3806         if (tx_flags == 0) {
3807                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3808                 auth_data->timeout_started = true;
3809                 run_again(sdata, auth_data->timeout);
3810         } else {
3811                 auth_data->timeout =
3812                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3813                 auth_data->timeout_started = true;
3814                 run_again(sdata, auth_data->timeout);
3815         }
3816
3817         return 0;
3818 }
3819
3820 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3821 {
3822         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3823         struct ieee80211_local *local = sdata->local;
3824
3825         sdata_assert_lock(sdata);
3826
3827         assoc_data->tries++;
3828         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3829                 sdata_info(sdata, "association with %pM timed out\n",
3830                            assoc_data->bss->bssid);
3831
3832                 /*
3833                  * Most likely AP is not in the range so remove the
3834                  * bss struct for that AP.
3835                  */
3836                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3837
3838                 return -ETIMEDOUT;
3839         }
3840
3841         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3842                    assoc_data->bss->bssid, assoc_data->tries,
3843                    IEEE80211_ASSOC_MAX_TRIES);
3844         ieee80211_send_assoc(sdata);
3845
3846         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3847                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3848                 assoc_data->timeout_started = true;
3849                 run_again(sdata, assoc_data->timeout);
3850         } else {
3851                 assoc_data->timeout =
3852                         round_jiffies_up(jiffies +
3853                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3854                 assoc_data->timeout_started = true;
3855                 run_again(sdata, assoc_data->timeout);
3856         }
3857
3858         return 0;
3859 }
3860
3861 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3862                                   __le16 fc, bool acked)
3863 {
3864         struct ieee80211_local *local = sdata->local;
3865
3866         sdata->u.mgd.status_fc = fc;
3867         sdata->u.mgd.status_acked = acked;
3868         sdata->u.mgd.status_received = true;
3869
3870         ieee80211_queue_work(&local->hw, &sdata->work);
3871 }
3872
3873 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3874 {
3875         struct ieee80211_local *local = sdata->local;
3876         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3877
3878         sdata_lock(sdata);
3879
3880         if (ifmgd->status_received) {
3881                 __le16 fc = ifmgd->status_fc;
3882                 bool status_acked = ifmgd->status_acked;
3883
3884                 ifmgd->status_received = false;
3885                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3886                         if (status_acked) {
3887                                 ifmgd->auth_data->timeout =
3888                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3889                                 run_again(sdata, ifmgd->auth_data->timeout);
3890                         } else {
3891                                 ifmgd->auth_data->timeout = jiffies - 1;
3892                         }
3893                         ifmgd->auth_data->timeout_started = true;
3894                 } else if (ifmgd->assoc_data &&
3895                            (ieee80211_is_assoc_req(fc) ||
3896                             ieee80211_is_reassoc_req(fc))) {
3897                         if (status_acked) {
3898                                 ifmgd->assoc_data->timeout =
3899                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3900                                 run_again(sdata, ifmgd->assoc_data->timeout);
3901                         } else {
3902                                 ifmgd->assoc_data->timeout = jiffies - 1;
3903                         }
3904                         ifmgd->assoc_data->timeout_started = true;
3905                 }
3906         }
3907
3908         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3909             time_after(jiffies, ifmgd->auth_data->timeout)) {
3910                 if (ifmgd->auth_data->done) {
3911                         /*
3912                          * ok ... we waited for assoc but userspace didn't,
3913                          * so let's just kill the auth data
3914                          */
3915                         ieee80211_destroy_auth_data(sdata, false);
3916                 } else if (ieee80211_auth(sdata)) {
3917                         u8 bssid[ETH_ALEN];
3918                         struct ieee80211_event event = {
3919                                 .type = MLME_EVENT,
3920                                 .u.mlme.data = AUTH_EVENT,
3921                                 .u.mlme.status = MLME_TIMEOUT,
3922                         };
3923
3924                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3925
3926                         ieee80211_destroy_auth_data(sdata, false);
3927
3928                         cfg80211_auth_timeout(sdata->dev, bssid);
3929                         drv_event_callback(sdata->local, sdata, &event);
3930                 }
3931         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3932                 run_again(sdata, ifmgd->auth_data->timeout);
3933
3934         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3935             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3936                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3937                     ieee80211_do_assoc(sdata)) {
3938                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3939                         struct ieee80211_event event = {
3940                                 .type = MLME_EVENT,
3941                                 .u.mlme.data = ASSOC_EVENT,
3942                                 .u.mlme.status = MLME_TIMEOUT,
3943                         };
3944
3945                         ieee80211_destroy_assoc_data(sdata, false, false);
3946                         cfg80211_assoc_timeout(sdata->dev, bss);
3947                         drv_event_callback(sdata->local, sdata, &event);
3948                 }
3949         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3950                 run_again(sdata, ifmgd->assoc_data->timeout);
3951
3952         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3953             ifmgd->associated) {
3954                 u8 bssid[ETH_ALEN];
3955                 int max_tries;
3956
3957                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3958
3959                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3960                         max_tries = max_nullfunc_tries;
3961                 else
3962                         max_tries = max_probe_tries;
3963
3964                 /* ACK received for nullfunc probing frame */
3965                 if (!ifmgd->probe_send_count)
3966                         ieee80211_reset_ap_probe(sdata);
3967                 else if (ifmgd->nullfunc_failed) {
3968                         if (ifmgd->probe_send_count < max_tries) {
3969                                 mlme_dbg(sdata,
3970                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3971                                          bssid, ifmgd->probe_send_count,
3972                                          max_tries);
3973                                 ieee80211_mgd_probe_ap_send(sdata);
3974                         } else {
3975                                 mlme_dbg(sdata,
3976                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3977                                          bssid);
3978                                 ieee80211_sta_connection_lost(sdata, bssid,
3979                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3980                                         false);
3981                         }
3982                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3983                         run_again(sdata, ifmgd->probe_timeout);
3984                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3985                         mlme_dbg(sdata,
3986                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3987                                  bssid, probe_wait_ms);
3988                         ieee80211_sta_connection_lost(sdata, bssid,
3989                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3990                 } else if (ifmgd->probe_send_count < max_tries) {
3991                         mlme_dbg(sdata,
3992                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3993                                  bssid, probe_wait_ms,
3994                                  ifmgd->probe_send_count, max_tries);
3995                         ieee80211_mgd_probe_ap_send(sdata);
3996                 } else {
3997                         /*
3998                          * We actually lost the connection ... or did we?
3999                          * Let's make sure!
4000                          */
4001                         mlme_dbg(sdata,
4002                                  "No probe response from AP %pM after %dms, disconnecting.\n",
4003                                  bssid, probe_wait_ms);
4004
4005                         ieee80211_sta_connection_lost(sdata, bssid,
4006                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4007                 }
4008         }
4009
4010         sdata_unlock(sdata);
4011 }
4012
4013 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
4014 {
4015         struct ieee80211_sub_if_data *sdata =
4016                 (struct ieee80211_sub_if_data *) data;
4017         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4018
4019         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4020                 return;
4021
4022         sdata->u.mgd.connection_loss = false;
4023         ieee80211_queue_work(&sdata->local->hw,
4024                              &sdata->u.mgd.beacon_connection_loss_work);
4025 }
4026
4027 static void ieee80211_sta_conn_mon_timer(unsigned long data)
4028 {
4029         struct ieee80211_sub_if_data *sdata =
4030                 (struct ieee80211_sub_if_data *) data;
4031         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4032         struct ieee80211_local *local = sdata->local;
4033
4034         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4035                 return;
4036
4037         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4038 }
4039
4040 static void ieee80211_sta_monitor_work(struct work_struct *work)
4041 {
4042         struct ieee80211_sub_if_data *sdata =
4043                 container_of(work, struct ieee80211_sub_if_data,
4044                              u.mgd.monitor_work);
4045
4046         ieee80211_mgd_probe_ap(sdata, false);
4047 }
4048
4049 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4050 {
4051         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4052                 __ieee80211_stop_poll(sdata);
4053
4054                 /* let's probe the connection once */
4055                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4056                         ieee80211_queue_work(&sdata->local->hw,
4057                                              &sdata->u.mgd.monitor_work);
4058         }
4059 }
4060
4061 #ifdef CONFIG_PM
4062 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4063 {
4064         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4065         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4066
4067         sdata_lock(sdata);
4068
4069         if (ifmgd->auth_data || ifmgd->assoc_data) {
4070                 const u8 *bssid = ifmgd->auth_data ?
4071                                 ifmgd->auth_data->bss->bssid :
4072                                 ifmgd->assoc_data->bss->bssid;
4073
4074                 /*
4075                  * If we are trying to authenticate / associate while suspending,
4076                  * cfg80211 won't know and won't actually abort those attempts,
4077                  * thus we need to do that ourselves.
4078                  */
4079                 ieee80211_send_deauth_disassoc(sdata, bssid,
4080                                                IEEE80211_STYPE_DEAUTH,
4081                                                WLAN_REASON_DEAUTH_LEAVING,
4082                                                false, frame_buf);
4083                 if (ifmgd->assoc_data)
4084                         ieee80211_destroy_assoc_data(sdata, false, true);
4085                 if (ifmgd->auth_data)
4086                         ieee80211_destroy_auth_data(sdata, false);
4087                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4088                                       IEEE80211_DEAUTH_FRAME_LEN);
4089         }
4090
4091         /* This is a bit of a hack - we should find a better and more generic
4092          * solution to this. Normally when suspending, cfg80211 will in fact
4093          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4094          * auth (not so important) or assoc (this is the problem) process.
4095          *
4096          * As a consequence, it can happen that we are in the process of both
4097          * associating and suspending, and receive an association response
4098          * after cfg80211 has checked if it needs to disconnect, but before
4099          * we actually set the flag to drop incoming frames. This will then
4100          * cause the workqueue flush to process the association response in
4101          * the suspend, resulting in a successful association just before it
4102          * tries to remove the interface from the driver, which now though
4103          * has a channel context assigned ... this results in issues.
4104          *
4105          * To work around this (for now) simply deauth here again if we're
4106          * now connected.
4107          */
4108         if (ifmgd->associated && !sdata->local->wowlan) {
4109                 u8 bssid[ETH_ALEN];
4110                 struct cfg80211_deauth_request req = {
4111                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4112                         .bssid = bssid,
4113                 };
4114
4115                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4116                 ieee80211_mgd_deauth(sdata, &req);
4117         }
4118
4119         sdata_unlock(sdata);
4120 }
4121
4122 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4123 {
4124         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4125
4126         sdata_lock(sdata);
4127         if (!ifmgd->associated) {
4128                 sdata_unlock(sdata);
4129                 return;
4130         }
4131
4132         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4133                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4134                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4135                 ieee80211_sta_connection_lost(sdata,
4136                                               ifmgd->associated->bssid,
4137                                               WLAN_REASON_UNSPECIFIED,
4138                                               true);
4139                 sdata_unlock(sdata);
4140                 return;
4141         }
4142         sdata_unlock(sdata);
4143 }
4144 #endif
4145
4146 /* interface setup */
4147 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4148 {
4149         struct ieee80211_if_managed *ifmgd;
4150
4151         ifmgd = &sdata->u.mgd;
4152         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4153         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4154         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4155                   ieee80211_beacon_connection_loss_work);
4156         INIT_WORK(&ifmgd->csa_connection_drop_work,
4157                   ieee80211_csa_connection_drop_work);
4158         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4159         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4160                           ieee80211_tdls_peer_del_work);
4161         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4162                     (unsigned long) sdata);
4163         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4164                     (unsigned long) sdata);
4165         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4166                     (unsigned long) sdata);
4167         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4168                     (unsigned long) sdata);
4169         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4170                           ieee80211_sta_handle_tspec_ac_params_wk);
4171
4172         ifmgd->flags = 0;
4173         ifmgd->powersave = sdata->wdev.ps;
4174         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4175         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4176         ifmgd->p2p_noa_index = -1;
4177
4178         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4179                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4180         else
4181                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4182
4183         /* Setup TDLS data */
4184         spin_lock_init(&ifmgd->teardown_lock);
4185         ifmgd->teardown_skb = NULL;
4186         ifmgd->orig_teardown_skb = NULL;
4187 }
4188
4189 /* scan finished notification */
4190 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4191 {
4192         struct ieee80211_sub_if_data *sdata;
4193
4194         /* Restart STA timers */
4195         rcu_read_lock();
4196         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4197                 if (ieee80211_sdata_running(sdata))
4198                         ieee80211_restart_sta_timer(sdata);
4199         }
4200         rcu_read_unlock();
4201 }
4202
4203 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4204                                      struct cfg80211_bss *cbss)
4205 {
4206         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4207         const u8 *ht_cap_ie, *vht_cap_ie;
4208         const struct ieee80211_ht_cap *ht_cap;
4209         const struct ieee80211_vht_cap *vht_cap;
4210         u8 chains = 1;
4211
4212         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4213                 return chains;
4214
4215         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4216         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4217                 ht_cap = (void *)(ht_cap_ie + 2);
4218                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4219                 /*
4220                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4221                  *       "Tx Unequal Modulation Supported" fields.
4222                  */
4223         }
4224
4225         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4226                 return chains;
4227
4228         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4229         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4230                 u8 nss;
4231                 u16 tx_mcs_map;
4232
4233                 vht_cap = (void *)(vht_cap_ie + 2);
4234                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4235                 for (nss = 8; nss > 0; nss--) {
4236                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4237                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4238                                 break;
4239                 }
4240                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4241                 chains = max(chains, nss);
4242         }
4243
4244         return chains;
4245 }
4246
4247 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4248                                   struct cfg80211_bss *cbss)
4249 {
4250         struct ieee80211_local *local = sdata->local;
4251         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4252         const struct ieee80211_ht_cap *ht_cap = NULL;
4253         const struct ieee80211_ht_operation *ht_oper = NULL;
4254         const struct ieee80211_vht_operation *vht_oper = NULL;
4255         struct ieee80211_supported_band *sband;
4256         struct cfg80211_chan_def chandef;
4257         int ret;
4258         u32 i;
4259         bool have_80mhz;
4260
4261         sband = local->hw.wiphy->bands[cbss->channel->band];
4262
4263         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4264                           IEEE80211_STA_DISABLE_80P80MHZ |
4265                           IEEE80211_STA_DISABLE_160MHZ);
4266
4267         rcu_read_lock();
4268
4269         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4270             sband->ht_cap.ht_supported) {
4271                 const u8 *ht_oper_ie, *ht_cap_ie;
4272
4273                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4274                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4275                         ht_oper = (void *)(ht_oper_ie + 2);
4276
4277                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4278                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4279                         ht_cap = (void *)(ht_cap_ie + 2);
4280
4281                 if (!ht_cap) {
4282                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4283                         ht_oper = NULL;
4284                 }
4285         }
4286
4287         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4288             sband->vht_cap.vht_supported) {
4289                 const u8 *vht_oper_ie, *vht_cap;
4290
4291                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4292                                                    WLAN_EID_VHT_OPERATION);
4293                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4294                         vht_oper = (void *)(vht_oper_ie + 2);
4295                 if (vht_oper && !ht_oper) {
4296                         vht_oper = NULL;
4297                         sdata_info(sdata,
4298                                    "AP advertised VHT without HT, disabling both\n");
4299                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4300                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4301                 }
4302
4303                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4304                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4305                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4306                         vht_oper = NULL;
4307                 }
4308         }
4309
4310         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4311         have_80mhz = false;
4312         for (i = 0; i < sband->n_channels; i++) {
4313                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4314                                                 IEEE80211_CHAN_NO_80MHZ))
4315                         continue;
4316
4317                 have_80mhz = true;
4318                 break;
4319         }
4320
4321         if (!have_80mhz)
4322                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4323
4324         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4325                                                      cbss->channel,
4326                                                      ht_cap, ht_oper, vht_oper,
4327                                                      &chandef, false);
4328
4329         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4330                                       local->rx_chains);
4331
4332         rcu_read_unlock();
4333
4334         /* will change later if needed */
4335         sdata->smps_mode = IEEE80211_SMPS_OFF;
4336
4337         mutex_lock(&local->mtx);
4338         /*
4339          * If this fails (possibly due to channel context sharing
4340          * on incompatible channels, e.g. 80+80 and 160 sharing the
4341          * same control channel) try to use a smaller bandwidth.
4342          */
4343         ret = ieee80211_vif_use_channel(sdata, &chandef,
4344                                         IEEE80211_CHANCTX_SHARED);
4345
4346         /* don't downgrade for 5 and 10 MHz channels, though. */
4347         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4348             chandef.width == NL80211_CHAN_WIDTH_10)
4349                 goto out;
4350
4351         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4352                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4353                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4354                                                 IEEE80211_CHANCTX_SHARED);
4355         }
4356  out:
4357         mutex_unlock(&local->mtx);
4358         return ret;
4359 }
4360
4361 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4362                                      struct cfg80211_bss *cbss, bool assoc,
4363                                      bool override)
4364 {
4365         struct ieee80211_local *local = sdata->local;
4366         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4367         struct ieee80211_bss *bss = (void *)cbss->priv;
4368         struct sta_info *new_sta = NULL;
4369         struct ieee80211_supported_band *sband;
4370         bool have_sta = false;
4371         int err;
4372
4373         sband = local->hw.wiphy->bands[cbss->channel->band];
4374
4375         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4376                 return -EINVAL;
4377
4378         /* If a reconfig is happening, bail out */
4379         if (local->in_reconfig)
4380                 return -EBUSY;
4381
4382         if (assoc) {
4383                 rcu_read_lock();
4384                 have_sta = sta_info_get(sdata, cbss->bssid);
4385                 rcu_read_unlock();
4386         }
4387
4388         if (!have_sta) {
4389                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4390                 if (!new_sta)
4391                         return -ENOMEM;
4392         }
4393
4394         /*
4395          * Set up the information for the new channel before setting the
4396          * new channel. We can't - completely race-free - change the basic
4397          * rates bitmap and the channel (sband) that it refers to, but if
4398          * we set it up before we at least avoid calling into the driver's
4399          * bss_info_changed() method with invalid information (since we do
4400          * call that from changing the channel - only for IDLE and perhaps
4401          * some others, but ...).
4402          *
4403          * So to avoid that, just set up all the new information before the
4404          * channel, but tell the driver to apply it only afterwards, since
4405          * it might need the new channel for that.
4406          */
4407         if (new_sta) {
4408                 u32 rates = 0, basic_rates = 0;
4409                 bool have_higher_than_11mbit;
4410                 int min_rate = INT_MAX, min_rate_index = -1;
4411                 const struct cfg80211_bss_ies *ies;
4412                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4413
4414                 ieee80211_get_rates(sband, bss->supp_rates,
4415                                     bss->supp_rates_len,
4416                                     &rates, &basic_rates,
4417                                     &have_higher_than_11mbit,
4418                                     &min_rate, &min_rate_index,
4419                                     shift);
4420
4421                 /*
4422                  * This used to be a workaround for basic rates missing
4423                  * in the association response frame. Now that we no
4424                  * longer use the basic rates from there, it probably
4425                  * doesn't happen any more, but keep the workaround so
4426                  * in case some *other* APs are buggy in different ways
4427                  * we can connect -- with a warning.
4428                  */
4429                 if (!basic_rates && min_rate_index >= 0) {
4430                         sdata_info(sdata,
4431                                    "No basic rates, using min rate instead\n");
4432                         basic_rates = BIT(min_rate_index);
4433                 }
4434
4435                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4436                 sdata->vif.bss_conf.basic_rates = basic_rates;
4437
4438                 /* cf. IEEE 802.11 9.2.12 */
4439                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4440                     have_higher_than_11mbit)
4441                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4442                 else
4443                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4444
4445                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4446
4447                 /* set timing information */
4448                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4449                 rcu_read_lock();
4450                 ies = rcu_dereference(cbss->beacon_ies);
4451                 if (ies) {
4452                         const u8 *tim_ie;
4453
4454                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4455                         sdata->vif.bss_conf.sync_device_ts =
4456                                 bss->device_ts_beacon;
4457                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4458                                                   ies->data, ies->len);
4459                         if (tim_ie && tim_ie[1] >= 2)
4460                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4461                         else
4462                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4463                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4464                                                TIMING_BEACON_ONLY)) {
4465                         ies = rcu_dereference(cbss->proberesp_ies);
4466                         /* must be non-NULL since beacon IEs were NULL */
4467                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4468                         sdata->vif.bss_conf.sync_device_ts =
4469                                 bss->device_ts_presp;
4470                         sdata->vif.bss_conf.sync_dtim_count = 0;
4471                 } else {
4472                         sdata->vif.bss_conf.sync_tsf = 0;
4473                         sdata->vif.bss_conf.sync_device_ts = 0;
4474                         sdata->vif.bss_conf.sync_dtim_count = 0;
4475                 }
4476                 rcu_read_unlock();
4477         }
4478
4479         if (new_sta || override) {
4480                 err = ieee80211_prep_channel(sdata, cbss);
4481                 if (err) {
4482                         if (new_sta)
4483                                 sta_info_free(local, new_sta);
4484                         return -EINVAL;
4485                 }
4486         }
4487
4488         if (new_sta) {
4489                 /*
4490                  * tell driver about BSSID, basic rates and timing
4491                  * this was set up above, before setting the channel
4492                  */
4493                 ieee80211_bss_info_change_notify(sdata,
4494                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4495                         BSS_CHANGED_BEACON_INT);
4496
4497                 if (assoc)
4498                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4499
4500                 err = sta_info_insert(new_sta);
4501                 new_sta = NULL;
4502                 if (err) {
4503                         sdata_info(sdata,
4504                                    "failed to insert STA entry for the AP (error %d)\n",
4505                                    err);
4506                         return err;
4507                 }
4508         } else
4509                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4510
4511         /* Cancel scan to ensure that nothing interferes with connection */
4512         if (local->scanning)
4513                 ieee80211_scan_cancel(local);
4514
4515         return 0;
4516 }
4517
4518 /* config hooks */
4519 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4520                        struct cfg80211_auth_request *req)
4521 {
4522         struct ieee80211_local *local = sdata->local;
4523         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4524         struct ieee80211_mgd_auth_data *auth_data;
4525         u16 auth_alg;
4526         int err;
4527
4528         /* prepare auth data structure */
4529
4530         switch (req->auth_type) {
4531         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4532                 auth_alg = WLAN_AUTH_OPEN;
4533                 break;
4534         case NL80211_AUTHTYPE_SHARED_KEY:
4535                 if (IS_ERR(local->wep_tx_tfm))
4536                         return -EOPNOTSUPP;
4537                 auth_alg = WLAN_AUTH_SHARED_KEY;
4538                 break;
4539         case NL80211_AUTHTYPE_FT:
4540                 auth_alg = WLAN_AUTH_FT;
4541                 break;
4542         case NL80211_AUTHTYPE_NETWORK_EAP:
4543                 auth_alg = WLAN_AUTH_LEAP;
4544                 break;
4545         case NL80211_AUTHTYPE_SAE:
4546                 auth_alg = WLAN_AUTH_SAE;
4547                 break;
4548         case NL80211_AUTHTYPE_FILS_SK:
4549                 auth_alg = WLAN_AUTH_FILS_SK;
4550                 break;
4551         case NL80211_AUTHTYPE_FILS_SK_PFS:
4552                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4553                 break;
4554         case NL80211_AUTHTYPE_FILS_PK:
4555                 auth_alg = WLAN_AUTH_FILS_PK;
4556                 break;
4557         default:
4558                 return -EOPNOTSUPP;
4559         }
4560
4561         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4562                             req->ie_len, GFP_KERNEL);
4563         if (!auth_data)
4564                 return -ENOMEM;
4565
4566         auth_data->bss = req->bss;
4567
4568         if (req->auth_data_len >= 4) {
4569                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4570                         __le16 *pos = (__le16 *) req->auth_data;
4571
4572                         auth_data->sae_trans = le16_to_cpu(pos[0]);
4573                         auth_data->sae_status = le16_to_cpu(pos[1]);
4574                 }
4575                 memcpy(auth_data->data, req->auth_data + 4,
4576                        req->auth_data_len - 4);
4577                 auth_data->data_len += req->auth_data_len - 4;
4578         }
4579
4580         if (req->ie && req->ie_len) {
4581                 memcpy(&auth_data->data[auth_data->data_len],
4582                        req->ie, req->ie_len);
4583                 auth_data->data_len += req->ie_len;
4584         }
4585
4586         if (req->key && req->key_len) {
4587                 auth_data->key_len = req->key_len;
4588                 auth_data->key_idx = req->key_idx;
4589                 memcpy(auth_data->key, req->key, req->key_len);
4590         }
4591
4592         auth_data->algorithm = auth_alg;
4593
4594         /* try to authenticate/probe */
4595
4596         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4597             ifmgd->assoc_data) {
4598                 err = -EBUSY;
4599                 goto err_free;
4600         }
4601
4602         if (ifmgd->auth_data)
4603                 ieee80211_destroy_auth_data(sdata, false);
4604
4605         /* prep auth_data so we don't go into idle on disassoc */
4606         ifmgd->auth_data = auth_data;
4607
4608         if (ifmgd->associated) {
4609                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4610
4611                 sdata_info(sdata,
4612                            "disconnect from AP %pM for new auth to %pM\n",
4613                            ifmgd->associated->bssid, req->bss->bssid);
4614                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4615                                        WLAN_REASON_UNSPECIFIED,
4616                                        false, frame_buf);
4617
4618                 ieee80211_report_disconnect(sdata, frame_buf,
4619                                             sizeof(frame_buf), true,
4620                                             WLAN_REASON_UNSPECIFIED);
4621         }
4622
4623         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4624
4625         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4626         if (err)
4627                 goto err_clear;
4628
4629         err = ieee80211_auth(sdata);
4630         if (err) {
4631                 sta_info_destroy_addr(sdata, req->bss->bssid);
4632                 goto err_clear;
4633         }
4634
4635         /* hold our own reference */
4636         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4637         return 0;
4638
4639  err_clear:
4640         eth_zero_addr(ifmgd->bssid);
4641         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4642         ifmgd->auth_data = NULL;
4643         mutex_lock(&sdata->local->mtx);
4644         ieee80211_vif_release_channel(sdata);
4645         mutex_unlock(&sdata->local->mtx);
4646  err_free:
4647         kfree(auth_data);
4648         return err;
4649 }
4650
4651 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4652                         struct cfg80211_assoc_request *req)
4653 {
4654         struct ieee80211_local *local = sdata->local;
4655         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4656         struct ieee80211_bss *bss = (void *)req->bss->priv;
4657         struct ieee80211_mgd_assoc_data *assoc_data;
4658         const struct cfg80211_bss_ies *beacon_ies;
4659         struct ieee80211_supported_band *sband;
4660         const u8 *ssidie, *ht_ie, *vht_ie;
4661         int i, err;
4662         bool override = false;
4663
4664         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4665         if (!assoc_data)
4666                 return -ENOMEM;
4667
4668         rcu_read_lock();
4669         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4670         if (!ssidie) {
4671                 rcu_read_unlock();
4672                 kfree(assoc_data);
4673                 return -EINVAL;
4674         }
4675         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4676         assoc_data->ssid_len = ssidie[1];
4677         rcu_read_unlock();
4678
4679         if (ifmgd->associated) {
4680                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4681
4682                 sdata_info(sdata,
4683                            "disconnect from AP %pM for new assoc to %pM\n",
4684                            ifmgd->associated->bssid, req->bss->bssid);
4685                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4686                                        WLAN_REASON_UNSPECIFIED,
4687                                        false, frame_buf);
4688
4689                 ieee80211_report_disconnect(sdata, frame_buf,
4690                                             sizeof(frame_buf), true,
4691                                             WLAN_REASON_UNSPECIFIED);
4692         }
4693
4694         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4695                 err = -EBUSY;
4696                 goto err_free;
4697         }
4698
4699         if (ifmgd->assoc_data) {
4700                 err = -EBUSY;
4701                 goto err_free;
4702         }
4703
4704         if (ifmgd->auth_data) {
4705                 bool match;
4706
4707                 /* keep sta info, bssid if matching */
4708                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4709                 ieee80211_destroy_auth_data(sdata, match);
4710         }
4711
4712         /* prepare assoc data */
4713
4714         ifmgd->beacon_crc_valid = false;
4715
4716         assoc_data->wmm = bss->wmm_used &&
4717                           (local->hw.queues >= IEEE80211_NUM_ACS);
4718
4719         /*
4720          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4721          * We still associate in non-HT mode (11a/b/g) if any one of these
4722          * ciphers is configured as pairwise.
4723          * We can set this to true for non-11n hardware, that'll be checked
4724          * separately along with the peer capabilities.
4725          */
4726         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4727                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4728                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4729                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4730                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4731                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4732                         netdev_info(sdata->dev,
4733                                     "disabling HT/VHT due to WEP/TKIP use\n");
4734                 }
4735         }
4736
4737         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4738         sband = local->hw.wiphy->bands[req->bss->channel->band];
4739         if (!sband->ht_cap.ht_supported ||
4740             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4741             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4742                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4743                 if (!bss->wmm_used &&
4744                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4745                         netdev_info(sdata->dev,
4746                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4747         }
4748
4749         /* disable VHT if we don't support it or the AP doesn't use WMM */
4750         if (!sband->vht_cap.vht_supported ||
4751             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4752             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4753                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4754                 if (!bss->wmm_used &&
4755                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4756                         netdev_info(sdata->dev,
4757                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4758         }
4759
4760         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4761         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4762                sizeof(ifmgd->ht_capa_mask));
4763
4764         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4765         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4766                sizeof(ifmgd->vht_capa_mask));
4767
4768         if (req->ie && req->ie_len) {
4769                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4770                 assoc_data->ie_len = req->ie_len;
4771         }
4772
4773         if (req->fils_kek) {
4774                 /* should already be checked in cfg80211 - so warn */
4775                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4776                         err = -EINVAL;
4777                         goto err_free;
4778                 }
4779                 memcpy(assoc_data->fils_kek, req->fils_kek,
4780                        req->fils_kek_len);
4781                 assoc_data->fils_kek_len = req->fils_kek_len;
4782         }
4783
4784         if (req->fils_nonces)
4785                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4786                        2 * FILS_NONCE_LEN);
4787
4788         assoc_data->bss = req->bss;
4789
4790         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4791                 if (ifmgd->powersave)
4792                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4793                 else
4794                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4795         } else
4796                 sdata->smps_mode = ifmgd->req_smps;
4797
4798         assoc_data->capability = req->bss->capability;
4799         assoc_data->supp_rates = bss->supp_rates;
4800         assoc_data->supp_rates_len = bss->supp_rates_len;
4801
4802         rcu_read_lock();
4803         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4804         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4805                 assoc_data->ap_ht_param =
4806                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4807         else
4808                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4809         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4810         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4811                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4812                        sizeof(struct ieee80211_vht_cap));
4813         else
4814                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4815         rcu_read_unlock();
4816
4817         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4818                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4819              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4820                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4821
4822         if (bss->wmm_used && bss->uapsd_supported &&
4823             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4824                 assoc_data->uapsd = true;
4825                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4826         } else {
4827                 assoc_data->uapsd = false;
4828                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4829         }
4830
4831         if (req->prev_bssid)
4832                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4833
4834         if (req->use_mfp) {
4835                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4836                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4837         } else {
4838                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4839                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4840         }
4841
4842         if (req->flags & ASSOC_REQ_USE_RRM)
4843                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4844         else
4845                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4846
4847         if (req->crypto.control_port)
4848                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4849         else
4850                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4851
4852         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4853         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4854         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4855                                                         sdata->vif.type);
4856
4857         /* kick off associate process */
4858
4859         ifmgd->assoc_data = assoc_data;
4860         ifmgd->dtim_period = 0;
4861         ifmgd->have_beacon = false;
4862
4863         /* override HT/VHT configuration only if the AP and we support it */
4864         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4865                 struct ieee80211_sta_ht_cap sta_ht_cap;
4866
4867                 if (req->flags & ASSOC_REQ_DISABLE_HT)
4868                         override = true;
4869
4870                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4871                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4872
4873                 /* check for 40 MHz disable override */
4874                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4875                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4876                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4877                         override = true;
4878
4879                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4880                     req->flags & ASSOC_REQ_DISABLE_VHT)
4881                         override = true;
4882         }
4883
4884         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4885                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4886                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4887         }
4888
4889         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4890                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4891
4892         err = ieee80211_prep_connection(sdata, req->bss, true, override);
4893         if (err)
4894                 goto err_clear;
4895
4896         rcu_read_lock();
4897         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4898
4899         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4900             !beacon_ies) {
4901                 /*
4902                  * Wait up to one beacon interval ...
4903                  * should this be more if we miss one?
4904                  */
4905                 sdata_info(sdata, "waiting for beacon from %pM\n",
4906                            ifmgd->bssid);
4907                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4908                 assoc_data->timeout_started = true;
4909                 assoc_data->need_beacon = true;
4910         } else if (beacon_ies) {
4911                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4912                                                     beacon_ies->data,
4913                                                     beacon_ies->len);
4914                 u8 dtim_count = 0;
4915
4916                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4917                         const struct ieee80211_tim_ie *tim;
4918                         tim = (void *)(tim_ie + 2);
4919                         ifmgd->dtim_period = tim->dtim_period;
4920                         dtim_count = tim->dtim_count;
4921                 }
4922                 ifmgd->have_beacon = true;
4923                 assoc_data->timeout = jiffies;
4924                 assoc_data->timeout_started = true;
4925
4926                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4927                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4928                         sdata->vif.bss_conf.sync_device_ts =
4929                                 bss->device_ts_beacon;
4930                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4931                 }
4932         } else {
4933                 assoc_data->timeout = jiffies;
4934                 assoc_data->timeout_started = true;
4935         }
4936         rcu_read_unlock();
4937
4938         run_again(sdata, assoc_data->timeout);
4939
4940         if (bss->corrupt_data) {
4941                 char *corrupt_type = "data";
4942                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4943                         if (bss->corrupt_data &
4944                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4945                                 corrupt_type = "beacon and probe response";
4946                         else
4947                                 corrupt_type = "beacon";
4948                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4949                         corrupt_type = "probe response";
4950                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4951                            corrupt_type);
4952         }
4953
4954         return 0;
4955  err_clear:
4956         eth_zero_addr(ifmgd->bssid);
4957         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4958         ifmgd->assoc_data = NULL;
4959  err_free:
4960         kfree(assoc_data);
4961         return err;
4962 }
4963
4964 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4965                          struct cfg80211_deauth_request *req)
4966 {
4967         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4968         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4969         bool tx = !req->local_state_change;
4970
4971         if (ifmgd->auth_data &&
4972             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4973                 sdata_info(sdata,
4974                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4975                            req->bssid, req->reason_code,
4976                            ieee80211_get_reason_code_string(req->reason_code));
4977
4978                 drv_mgd_prepare_tx(sdata->local, sdata);
4979                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4980                                                IEEE80211_STYPE_DEAUTH,
4981                                                req->reason_code, tx,
4982                                                frame_buf);
4983                 ieee80211_destroy_auth_data(sdata, false);
4984                 ieee80211_report_disconnect(sdata, frame_buf,
4985                                             sizeof(frame_buf), true,
4986                                             req->reason_code);
4987
4988                 return 0;
4989         }
4990
4991         if (ifmgd->assoc_data &&
4992             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4993                 sdata_info(sdata,
4994                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
4995                            req->bssid, req->reason_code,
4996                            ieee80211_get_reason_code_string(req->reason_code));
4997
4998                 drv_mgd_prepare_tx(sdata->local, sdata);
4999                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5000                                                IEEE80211_STYPE_DEAUTH,
5001                                                req->reason_code, tx,
5002                                                frame_buf);
5003                 ieee80211_destroy_assoc_data(sdata, false, true);
5004                 ieee80211_report_disconnect(sdata, frame_buf,
5005                                             sizeof(frame_buf), true,
5006                                             req->reason_code);
5007                 return 0;
5008         }
5009
5010         if (ifmgd->associated &&
5011             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5012                 sdata_info(sdata,
5013                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5014                            req->bssid, req->reason_code,
5015                            ieee80211_get_reason_code_string(req->reason_code));
5016
5017                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5018                                        req->reason_code, tx, frame_buf);
5019                 ieee80211_report_disconnect(sdata, frame_buf,
5020                                             sizeof(frame_buf), true,
5021                                             req->reason_code);
5022                 return 0;
5023         }
5024
5025         return -ENOTCONN;
5026 }
5027
5028 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5029                            struct cfg80211_disassoc_request *req)
5030 {
5031         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5032         u8 bssid[ETH_ALEN];
5033         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5034
5035         /*
5036          * cfg80211 should catch this ... but it's racy since
5037          * we can receive a disassoc frame, process it, hand it
5038          * to cfg80211 while that's in a locked section already
5039          * trying to tell us that the user wants to disconnect.
5040          */
5041         if (ifmgd->associated != req->bss)
5042                 return -ENOLINK;
5043
5044         sdata_info(sdata,
5045                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5046                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5047
5048         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5049         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5050                                req->reason_code, !req->local_state_change,
5051                                frame_buf);
5052
5053         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5054                                     req->reason_code);
5055
5056         return 0;
5057 }
5058
5059 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5060 {
5061         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5062
5063         /*
5064          * Make sure some work items will not run after this,
5065          * they will not do anything but might not have been
5066          * cancelled when disconnecting.
5067          */
5068         cancel_work_sync(&ifmgd->monitor_work);
5069         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5070         cancel_work_sync(&ifmgd->request_smps_work);
5071         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5072         cancel_work_sync(&ifmgd->chswitch_work);
5073         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5074
5075         sdata_lock(sdata);
5076         if (ifmgd->assoc_data) {
5077                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5078                 ieee80211_destroy_assoc_data(sdata, false, false);
5079                 cfg80211_assoc_timeout(sdata->dev, bss);
5080         }
5081         if (ifmgd->auth_data)
5082                 ieee80211_destroy_auth_data(sdata, false);
5083         spin_lock_bh(&ifmgd->teardown_lock);
5084         if (ifmgd->teardown_skb) {
5085                 kfree_skb(ifmgd->teardown_skb);
5086                 ifmgd->teardown_skb = NULL;
5087                 ifmgd->orig_teardown_skb = NULL;
5088         }
5089         spin_unlock_bh(&ifmgd->teardown_lock);
5090         del_timer_sync(&ifmgd->timer);
5091         sdata_unlock(sdata);
5092 }
5093
5094 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5095                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5096                                s32 rssi_level,
5097                                gfp_t gfp)
5098 {
5099         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5100
5101         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5102
5103         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5104 }
5105 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5106
5107 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5108 {
5109         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5110
5111         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5112
5113         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5114 }
5115 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);