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         memset(&csa_ie, 0, sizeof(csa_ie));
1126         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1127                                            ifmgd->flags,
1128                                            ifmgd->associated->bssid, &csa_ie);
1129         if (res < 0)
1130                 ieee80211_queue_work(&local->hw,
1131                                      &ifmgd->csa_connection_drop_work);
1132         if (res)
1133                 return;
1134
1135         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1136                                      IEEE80211_CHAN_DISABLED)) {
1137                 sdata_info(sdata,
1138                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1139                            ifmgd->associated->bssid,
1140                            csa_ie.chandef.chan->center_freq,
1141                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1142                            csa_ie.chandef.center_freq2);
1143                 ieee80211_queue_work(&local->hw,
1144                                      &ifmgd->csa_connection_drop_work);
1145                 return;
1146         }
1147
1148         if (cfg80211_chandef_identical(&csa_ie.chandef,
1149                                        &sdata->vif.bss_conf.chandef)) {
1150                 if (ifmgd->csa_ignored_same_chan)
1151                         return;
1152                 sdata_info(sdata,
1153                            "AP %pM tries to chanswitch to same channel, ignore\n",
1154                            ifmgd->associated->bssid);
1155                 ifmgd->csa_ignored_same_chan = true;
1156                 return;
1157         }
1158
1159         /*
1160          * Drop all TDLS peers - either we disconnect or move to a different
1161          * channel from this point on. There's no telling what our peer will do.
1162          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1163          * have an incompatible wider chandef.
1164          */
1165         ieee80211_teardown_tdls_peers(sdata);
1166
1167         mutex_lock(&local->mtx);
1168         mutex_lock(&local->chanctx_mtx);
1169         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1170                                          lockdep_is_held(&local->chanctx_mtx));
1171         if (!conf) {
1172                 sdata_info(sdata,
1173                            "no channel context assigned to vif?, disconnecting\n");
1174                 goto drop_connection;
1175         }
1176
1177         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1178
1179         if (local->use_chanctx &&
1180             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1181                 sdata_info(sdata,
1182                            "driver doesn't support chan-switch with channel contexts\n");
1183                 goto drop_connection;
1184         }
1185
1186         ch_switch.timestamp = timestamp;
1187         ch_switch.device_timestamp = device_timestamp;
1188         ch_switch.block_tx = csa_ie.mode;
1189         ch_switch.chandef = csa_ie.chandef;
1190         ch_switch.count = csa_ie.count;
1191
1192         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1193                 sdata_info(sdata,
1194                            "preparing for channel switch failed, disconnecting\n");
1195                 goto drop_connection;
1196         }
1197
1198         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1199                                             chanctx->mode, false);
1200         if (res) {
1201                 sdata_info(sdata,
1202                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1203                            res);
1204                 goto drop_connection;
1205         }
1206         mutex_unlock(&local->chanctx_mtx);
1207
1208         sdata->vif.csa_active = true;
1209         sdata->csa_chandef = csa_ie.chandef;
1210         sdata->csa_block_tx = csa_ie.mode;
1211         ifmgd->csa_ignored_same_chan = false;
1212
1213         if (sdata->csa_block_tx)
1214                 ieee80211_stop_vif_queues(local, sdata,
1215                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1216         mutex_unlock(&local->mtx);
1217
1218         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1219                                           csa_ie.count);
1220
1221         if (local->ops->channel_switch) {
1222                 /* use driver's channel switch callback */
1223                 drv_channel_switch(local, sdata, &ch_switch);
1224                 return;
1225         }
1226
1227         /* channel switch handled in software */
1228         if (csa_ie.count <= 1)
1229                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1230         else
1231                 mod_timer(&ifmgd->chswitch_timer,
1232                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1233                                          cbss->beacon_interval));
1234         return;
1235  drop_connection:
1236         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1237         mutex_unlock(&local->chanctx_mtx);
1238         mutex_unlock(&local->mtx);
1239 }
1240
1241 static bool
1242 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1243                                  struct ieee80211_channel *channel,
1244                                  const u8 *country_ie, u8 country_ie_len,
1245                                  const u8 *pwr_constr_elem,
1246                                  int *chan_pwr, int *pwr_reduction)
1247 {
1248         struct ieee80211_country_ie_triplet *triplet;
1249         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1250         int i, chan_increment;
1251         bool have_chan_pwr = false;
1252
1253         /* Invalid IE */
1254         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1255                 return false;
1256
1257         triplet = (void *)(country_ie + 3);
1258         country_ie_len -= 3;
1259
1260         switch (channel->band) {
1261         default:
1262                 WARN_ON_ONCE(1);
1263                 /* fall through */
1264         case NL80211_BAND_2GHZ:
1265         case NL80211_BAND_60GHZ:
1266                 chan_increment = 1;
1267                 break;
1268         case NL80211_BAND_5GHZ:
1269                 chan_increment = 4;
1270                 break;
1271         }
1272
1273         /* find channel */
1274         while (country_ie_len >= 3) {
1275                 u8 first_channel = triplet->chans.first_channel;
1276
1277                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1278                         goto next;
1279
1280                 for (i = 0; i < triplet->chans.num_channels; i++) {
1281                         if (first_channel + i * chan_increment == chan) {
1282                                 have_chan_pwr = true;
1283                                 *chan_pwr = triplet->chans.max_power;
1284                                 break;
1285                         }
1286                 }
1287                 if (have_chan_pwr)
1288                         break;
1289
1290  next:
1291                 triplet++;
1292                 country_ie_len -= 3;
1293         }
1294
1295         if (have_chan_pwr && pwr_constr_elem)
1296                 *pwr_reduction = *pwr_constr_elem;
1297         else
1298                 *pwr_reduction = 0;
1299
1300         return have_chan_pwr;
1301 }
1302
1303 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1304                                       struct ieee80211_channel *channel,
1305                                       const u8 *cisco_dtpc_ie,
1306                                       int *pwr_level)
1307 {
1308         /* From practical testing, the first data byte of the DTPC element
1309          * seems to contain the requested dBm level, and the CLI on Cisco
1310          * APs clearly state the range is -127 to 127 dBm, which indicates
1311          * a signed byte, although it seemingly never actually goes negative.
1312          * The other byte seems to always be zero.
1313          */
1314         *pwr_level = (__s8)cisco_dtpc_ie[4];
1315 }
1316
1317 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1318                                        struct ieee80211_channel *channel,
1319                                        struct ieee80211_mgmt *mgmt,
1320                                        const u8 *country_ie, u8 country_ie_len,
1321                                        const u8 *pwr_constr_ie,
1322                                        const u8 *cisco_dtpc_ie)
1323 {
1324         bool has_80211h_pwr = false, has_cisco_pwr = false;
1325         int chan_pwr = 0, pwr_reduction_80211h = 0;
1326         int pwr_level_cisco, pwr_level_80211h;
1327         int new_ap_level;
1328         __le16 capab = mgmt->u.probe_resp.capab_info;
1329
1330         if (country_ie &&
1331             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1332              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1333                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1334                         sdata, channel, country_ie, country_ie_len,
1335                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1336                 pwr_level_80211h =
1337                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1338         }
1339
1340         if (cisco_dtpc_ie) {
1341                 ieee80211_find_cisco_dtpc(
1342                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1343                 has_cisco_pwr = true;
1344         }
1345
1346         if (!has_80211h_pwr && !has_cisco_pwr)
1347                 return 0;
1348
1349         /* If we have both 802.11h and Cisco DTPC, apply both limits
1350          * by picking the smallest of the two power levels advertised.
1351          */
1352         if (has_80211h_pwr &&
1353             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1354                 new_ap_level = pwr_level_80211h;
1355
1356                 if (sdata->ap_power_level == new_ap_level)
1357                         return 0;
1358
1359                 sdata_dbg(sdata,
1360                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1361                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1362                           sdata->u.mgd.bssid);
1363         } else {  /* has_cisco_pwr is always true here. */
1364                 new_ap_level = pwr_level_cisco;
1365
1366                 if (sdata->ap_power_level == new_ap_level)
1367                         return 0;
1368
1369                 sdata_dbg(sdata,
1370                           "Limiting TX power to %d dBm as advertised by %pM\n",
1371                           pwr_level_cisco, sdata->u.mgd.bssid);
1372         }
1373
1374         sdata->ap_power_level = new_ap_level;
1375         if (__ieee80211_recalc_txpower(sdata))
1376                 return BSS_CHANGED_TXPOWER;
1377         return 0;
1378 }
1379
1380 /* powersave */
1381 static void ieee80211_enable_ps(struct ieee80211_local *local,
1382                                 struct ieee80211_sub_if_data *sdata)
1383 {
1384         struct ieee80211_conf *conf = &local->hw.conf;
1385
1386         /*
1387          * If we are scanning right now then the parameters will
1388          * take effect when scan finishes.
1389          */
1390         if (local->scanning)
1391                 return;
1392
1393         if (conf->dynamic_ps_timeout > 0 &&
1394             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1395                 mod_timer(&local->dynamic_ps_timer, jiffies +
1396                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1397         } else {
1398                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1399                         ieee80211_send_nullfunc(local, sdata, true);
1400
1401                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1402                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1403                         return;
1404
1405                 conf->flags |= IEEE80211_CONF_PS;
1406                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1407         }
1408 }
1409
1410 static void ieee80211_change_ps(struct ieee80211_local *local)
1411 {
1412         struct ieee80211_conf *conf = &local->hw.conf;
1413
1414         if (local->ps_sdata) {
1415                 ieee80211_enable_ps(local, local->ps_sdata);
1416         } else if (conf->flags & IEEE80211_CONF_PS) {
1417                 conf->flags &= ~IEEE80211_CONF_PS;
1418                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1419                 del_timer_sync(&local->dynamic_ps_timer);
1420                 cancel_work_sync(&local->dynamic_ps_enable_work);
1421         }
1422 }
1423
1424 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1425 {
1426         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1427         struct sta_info *sta = NULL;
1428         bool authorized = false;
1429
1430         if (!mgd->powersave)
1431                 return false;
1432
1433         if (mgd->broken_ap)
1434                 return false;
1435
1436         if (!mgd->associated)
1437                 return false;
1438
1439         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1440                 return false;
1441
1442         if (!mgd->have_beacon)
1443                 return false;
1444
1445         rcu_read_lock();
1446         sta = sta_info_get(sdata, mgd->bssid);
1447         if (sta)
1448                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1449         rcu_read_unlock();
1450
1451         return authorized;
1452 }
1453
1454 /* need to hold RTNL or interface lock */
1455 void ieee80211_recalc_ps(struct ieee80211_local *local)
1456 {
1457         struct ieee80211_sub_if_data *sdata, *found = NULL;
1458         int count = 0;
1459         int timeout;
1460
1461         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1462                 local->ps_sdata = NULL;
1463                 return;
1464         }
1465
1466         list_for_each_entry(sdata, &local->interfaces, list) {
1467                 if (!ieee80211_sdata_running(sdata))
1468                         continue;
1469                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1470                         /* If an AP vif is found, then disable PS
1471                          * by setting the count to zero thereby setting
1472                          * ps_sdata to NULL.
1473                          */
1474                         count = 0;
1475                         break;
1476                 }
1477                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1478                         continue;
1479                 found = sdata;
1480                 count++;
1481         }
1482
1483         if (count == 1 && ieee80211_powersave_allowed(found)) {
1484                 u8 dtimper = found->u.mgd.dtim_period;
1485
1486                 timeout = local->dynamic_ps_forced_timeout;
1487                 if (timeout < 0)
1488                         timeout = 100;
1489                 local->hw.conf.dynamic_ps_timeout = timeout;
1490
1491                 /* If the TIM IE is invalid, pretend the value is 1 */
1492                 if (!dtimper)
1493                         dtimper = 1;
1494
1495                 local->hw.conf.ps_dtim_period = dtimper;
1496                 local->ps_sdata = found;
1497         } else {
1498                 local->ps_sdata = NULL;
1499         }
1500
1501         ieee80211_change_ps(local);
1502 }
1503
1504 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1505 {
1506         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1507
1508         if (sdata->vif.bss_conf.ps != ps_allowed) {
1509                 sdata->vif.bss_conf.ps = ps_allowed;
1510                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1511         }
1512 }
1513
1514 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1515 {
1516         struct ieee80211_local *local =
1517                 container_of(work, struct ieee80211_local,
1518                              dynamic_ps_disable_work);
1519
1520         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1521                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1522                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1523         }
1524
1525         ieee80211_wake_queues_by_reason(&local->hw,
1526                                         IEEE80211_MAX_QUEUE_MAP,
1527                                         IEEE80211_QUEUE_STOP_REASON_PS,
1528                                         false);
1529 }
1530
1531 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1532 {
1533         struct ieee80211_local *local =
1534                 container_of(work, struct ieee80211_local,
1535                              dynamic_ps_enable_work);
1536         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1537         struct ieee80211_if_managed *ifmgd;
1538         unsigned long flags;
1539         int q;
1540
1541         /* can only happen when PS was just disabled anyway */
1542         if (!sdata)
1543                 return;
1544
1545         ifmgd = &sdata->u.mgd;
1546
1547         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1548                 return;
1549
1550         if (local->hw.conf.dynamic_ps_timeout > 0) {
1551                 /* don't enter PS if TX frames are pending */
1552                 if (drv_tx_frames_pending(local)) {
1553                         mod_timer(&local->dynamic_ps_timer, jiffies +
1554                                   msecs_to_jiffies(
1555                                   local->hw.conf.dynamic_ps_timeout));
1556                         return;
1557                 }
1558
1559                 /*
1560                  * transmission can be stopped by others which leads to
1561                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1562                  * is not the actual idle state.
1563                  */
1564                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1565                 for (q = 0; q < local->hw.queues; q++) {
1566                         if (local->queue_stop_reasons[q]) {
1567                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1568                                                        flags);
1569                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1570                                           msecs_to_jiffies(
1571                                           local->hw.conf.dynamic_ps_timeout));
1572                                 return;
1573                         }
1574                 }
1575                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1576         }
1577
1578         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1579             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1580                 if (drv_tx_frames_pending(local)) {
1581                         mod_timer(&local->dynamic_ps_timer, jiffies +
1582                                   msecs_to_jiffies(
1583                                   local->hw.conf.dynamic_ps_timeout));
1584                 } else {
1585                         ieee80211_send_nullfunc(local, sdata, true);
1586                         /* Flush to get the tx status of nullfunc frame */
1587                         ieee80211_flush_queues(local, sdata, false);
1588                 }
1589         }
1590
1591         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1592               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1593             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1594                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1595                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1596                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1597         }
1598 }
1599
1600 void ieee80211_dynamic_ps_timer(unsigned long data)
1601 {
1602         struct ieee80211_local *local = (void *) data;
1603
1604         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1605 }
1606
1607 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1608 {
1609         struct delayed_work *delayed_work = to_delayed_work(work);
1610         struct ieee80211_sub_if_data *sdata =
1611                 container_of(delayed_work, struct ieee80211_sub_if_data,
1612                              dfs_cac_timer_work);
1613         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1614
1615         mutex_lock(&sdata->local->mtx);
1616         if (sdata->wdev.cac_started) {
1617                 ieee80211_vif_release_channel(sdata);
1618                 cfg80211_cac_event(sdata->dev, &chandef,
1619                                    NL80211_RADAR_CAC_FINISHED,
1620                                    GFP_KERNEL);
1621         }
1622         mutex_unlock(&sdata->local->mtx);
1623 }
1624
1625 static bool
1626 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1627 {
1628         struct ieee80211_local *local = sdata->local;
1629         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1630         bool ret = false;
1631         int ac;
1632
1633         if (local->hw.queues < IEEE80211_NUM_ACS)
1634                 return false;
1635
1636         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1637                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1638                 int non_acm_ac;
1639                 unsigned long now = jiffies;
1640
1641                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1642                     tx_tspec->admitted_time &&
1643                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1644                         tx_tspec->consumed_tx_time = 0;
1645                         tx_tspec->time_slice_start = now;
1646
1647                         if (tx_tspec->downgraded)
1648                                 tx_tspec->action =
1649                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1650                 }
1651
1652                 switch (tx_tspec->action) {
1653                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1654                         /* take the original parameters */
1655                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1656                                 sdata_err(sdata,
1657                                           "failed to set TX queue parameters for queue %d\n",
1658                                           ac);
1659                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1660                         tx_tspec->downgraded = false;
1661                         ret = true;
1662                         break;
1663                 case TX_TSPEC_ACTION_DOWNGRADE:
1664                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1665                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1666                                 ret = true;
1667                                 break;
1668                         }
1669                         /* downgrade next lower non-ACM AC */
1670                         for (non_acm_ac = ac + 1;
1671                              non_acm_ac < IEEE80211_NUM_ACS;
1672                              non_acm_ac++)
1673                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1674                                         break;
1675                         /* Usually the loop will result in using BK even if it
1676                          * requires admission control, but such a configuration
1677                          * makes no sense and we have to transmit somehow - the
1678                          * AC selection does the same thing.
1679                          * If we started out trying to downgrade from BK, then
1680                          * the extra condition here might be needed.
1681                          */
1682                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1683                                 non_acm_ac = IEEE80211_AC_BK;
1684                         if (drv_conf_tx(local, sdata, ac,
1685                                         &sdata->tx_conf[non_acm_ac]))
1686                                 sdata_err(sdata,
1687                                           "failed to set TX queue parameters for queue %d\n",
1688                                           ac);
1689                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1690                         ret = true;
1691                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1692                                 tx_tspec->time_slice_start + HZ - now + 1);
1693                         break;
1694                 case TX_TSPEC_ACTION_NONE:
1695                         /* nothing now */
1696                         break;
1697                 }
1698         }
1699
1700         return ret;
1701 }
1702
1703 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1704 {
1705         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1706                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1707 }
1708
1709 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1710 {
1711         struct ieee80211_sub_if_data *sdata;
1712
1713         sdata = container_of(work, struct ieee80211_sub_if_data,
1714                              u.mgd.tx_tspec_wk.work);
1715         ieee80211_sta_handle_tspec_ac_params(sdata);
1716 }
1717
1718 /* MLME */
1719 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1720                                      struct ieee80211_sub_if_data *sdata,
1721                                      const u8 *wmm_param, size_t wmm_param_len)
1722 {
1723         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1724         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1725         size_t left;
1726         int count, ac;
1727         const u8 *pos;
1728         u8 uapsd_queues = 0;
1729
1730         if (!local->ops->conf_tx)
1731                 return false;
1732
1733         if (local->hw.queues < IEEE80211_NUM_ACS)
1734                 return false;
1735
1736         if (!wmm_param)
1737                 return false;
1738
1739         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1740                 return false;
1741
1742         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1743                 uapsd_queues = ifmgd->uapsd_queues;
1744
1745         count = wmm_param[6] & 0x0f;
1746         if (count == ifmgd->wmm_last_param_set)
1747                 return false;
1748         ifmgd->wmm_last_param_set = count;
1749
1750         pos = wmm_param + 8;
1751         left = wmm_param_len - 8;
1752
1753         memset(&params, 0, sizeof(params));
1754
1755         sdata->wmm_acm = 0;
1756         for (; left >= 4; left -= 4, pos += 4) {
1757                 int aci = (pos[0] >> 5) & 0x03;
1758                 int acm = (pos[0] >> 4) & 0x01;
1759                 bool uapsd = false;
1760
1761                 switch (aci) {
1762                 case 1: /* AC_BK */
1763                         ac = IEEE80211_AC_BK;
1764                         if (acm)
1765                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1766                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1767                                 uapsd = true;
1768                         break;
1769                 case 2: /* AC_VI */
1770                         ac = IEEE80211_AC_VI;
1771                         if (acm)
1772                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1773                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1774                                 uapsd = true;
1775                         break;
1776                 case 3: /* AC_VO */
1777                         ac = IEEE80211_AC_VO;
1778                         if (acm)
1779                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1780                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1781                                 uapsd = true;
1782                         break;
1783                 case 0: /* AC_BE */
1784                 default:
1785                         ac = IEEE80211_AC_BE;
1786                         if (acm)
1787                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1788                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1789                                 uapsd = true;
1790                         break;
1791                 }
1792
1793                 params[ac].aifs = pos[0] & 0x0f;
1794
1795                 if (params[ac].aifs < 2) {
1796                         sdata_info(sdata,
1797                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1798                                    params[ac].aifs, aci);
1799                         params[ac].aifs = 2;
1800                 }
1801                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1802                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1803                 params[ac].txop = get_unaligned_le16(pos + 2);
1804                 params[ac].acm = acm;
1805                 params[ac].uapsd = uapsd;
1806
1807                 if (params[ac].cw_min > params[ac].cw_max) {
1808                         sdata_info(sdata,
1809                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1810                                    params[ac].cw_min, params[ac].cw_max, aci);
1811                         return false;
1812                 }
1813         }
1814
1815         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1816                 mlme_dbg(sdata,
1817                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1818                          ac, params[ac].acm,
1819                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1820                          params[ac].txop, params[ac].uapsd,
1821                          ifmgd->tx_tspec[ac].downgraded);
1822                 sdata->tx_conf[ac] = params[ac];
1823                 if (!ifmgd->tx_tspec[ac].downgraded &&
1824                     drv_conf_tx(local, sdata, ac, &params[ac]))
1825                         sdata_err(sdata,
1826                                   "failed to set TX queue parameters for AC %d\n",
1827                                   ac);
1828         }
1829
1830         /* enable WMM or activate new settings */
1831         sdata->vif.bss_conf.qos = true;
1832         return true;
1833 }
1834
1835 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1836 {
1837         lockdep_assert_held(&sdata->local->mtx);
1838
1839         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1840         ieee80211_run_deferred_scan(sdata->local);
1841 }
1842
1843 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1844 {
1845         mutex_lock(&sdata->local->mtx);
1846         __ieee80211_stop_poll(sdata);
1847         mutex_unlock(&sdata->local->mtx);
1848 }
1849
1850 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1851                                            u16 capab, bool erp_valid, u8 erp)
1852 {
1853         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1854         struct ieee80211_supported_band *sband;
1855         u32 changed = 0;
1856         bool use_protection;
1857         bool use_short_preamble;
1858         bool use_short_slot;
1859
1860         sband = ieee80211_get_sband(sdata);
1861         if (!sband)
1862                 return changed;
1863
1864         if (erp_valid) {
1865                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1866                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1867         } else {
1868                 use_protection = false;
1869                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1870         }
1871
1872         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1873         if (sband->band == NL80211_BAND_5GHZ)
1874                 use_short_slot = true;
1875
1876         if (use_protection != bss_conf->use_cts_prot) {
1877                 bss_conf->use_cts_prot = use_protection;
1878                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1879         }
1880
1881         if (use_short_preamble != bss_conf->use_short_preamble) {
1882                 bss_conf->use_short_preamble = use_short_preamble;
1883                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1884         }
1885
1886         if (use_short_slot != bss_conf->use_short_slot) {
1887                 bss_conf->use_short_slot = use_short_slot;
1888                 changed |= BSS_CHANGED_ERP_SLOT;
1889         }
1890
1891         return changed;
1892 }
1893
1894 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1895                                      struct cfg80211_bss *cbss,
1896                                      u32 bss_info_changed)
1897 {
1898         struct ieee80211_bss *bss = (void *)cbss->priv;
1899         struct ieee80211_local *local = sdata->local;
1900         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1901
1902         bss_info_changed |= BSS_CHANGED_ASSOC;
1903         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1904                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1905
1906         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1907                 beacon_loss_count * bss_conf->beacon_int));
1908
1909         sdata->u.mgd.associated = cbss;
1910         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1911
1912         ieee80211_check_rate_mask(sdata);
1913
1914         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1915
1916         if (sdata->vif.p2p ||
1917             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1918                 const struct cfg80211_bss_ies *ies;
1919
1920                 rcu_read_lock();
1921                 ies = rcu_dereference(cbss->ies);
1922                 if (ies) {
1923                         int ret;
1924
1925                         ret = cfg80211_get_p2p_attr(
1926                                         ies->data, ies->len,
1927                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1928                                         (u8 *) &bss_conf->p2p_noa_attr,
1929                                         sizeof(bss_conf->p2p_noa_attr));
1930                         if (ret >= 2) {
1931                                 sdata->u.mgd.p2p_noa_index =
1932                                         bss_conf->p2p_noa_attr.index;
1933                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1934                         }
1935                 }
1936                 rcu_read_unlock();
1937         }
1938
1939         /* just to be sure */
1940         ieee80211_stop_poll(sdata);
1941
1942         ieee80211_led_assoc(local, 1);
1943
1944         if (sdata->u.mgd.have_beacon) {
1945                 /*
1946                  * If the AP is buggy we may get here with no DTIM period
1947                  * known, so assume it's 1 which is the only safe assumption
1948                  * in that case, although if the TIM IE is broken powersave
1949                  * probably just won't work at all.
1950                  */
1951                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1952                 bss_conf->beacon_rate = bss->beacon_rate;
1953                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1954         } else {
1955                 bss_conf->beacon_rate = NULL;
1956                 bss_conf->dtim_period = 0;
1957         }
1958
1959         bss_conf->assoc = 1;
1960
1961         /* Tell the driver to monitor connection quality (if supported) */
1962         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1963             bss_conf->cqm_rssi_thold)
1964                 bss_info_changed |= BSS_CHANGED_CQM;
1965
1966         /* Enable ARP filtering */
1967         if (bss_conf->arp_addr_cnt)
1968                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1969
1970         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1971
1972         mutex_lock(&local->iflist_mtx);
1973         ieee80211_recalc_ps(local);
1974         mutex_unlock(&local->iflist_mtx);
1975
1976         ieee80211_recalc_smps(sdata);
1977         ieee80211_recalc_ps_vif(sdata);
1978
1979         netif_carrier_on(sdata->dev);
1980 }
1981
1982 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1983                                    u16 stype, u16 reason, bool tx,
1984                                    u8 *frame_buf)
1985 {
1986         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1987         struct ieee80211_local *local = sdata->local;
1988         u32 changed = 0;
1989
1990         sdata_assert_lock(sdata);
1991
1992         if (WARN_ON_ONCE(tx && !frame_buf))
1993                 return;
1994
1995         if (WARN_ON(!ifmgd->associated))
1996                 return;
1997
1998         ieee80211_stop_poll(sdata);
1999
2000         ifmgd->associated = NULL;
2001         netif_carrier_off(sdata->dev);
2002
2003         /*
2004          * if we want to get out of ps before disassoc (why?) we have
2005          * to do it before sending disassoc, as otherwise the null-packet
2006          * won't be valid.
2007          */
2008         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2009                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2010                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2011         }
2012         local->ps_sdata = NULL;
2013
2014         /* disable per-vif ps */
2015         ieee80211_recalc_ps_vif(sdata);
2016
2017         /* make sure ongoing transmission finishes */
2018         synchronize_net();
2019
2020         /*
2021          * drop any frame before deauth/disassoc, this can be data or
2022          * management frame. Since we are disconnecting, we should not
2023          * insist sending these frames which can take time and delay
2024          * the disconnection and possible the roaming.
2025          */
2026         if (tx)
2027                 ieee80211_flush_queues(local, sdata, true);
2028
2029         /* deauthenticate/disassociate now */
2030         if (tx || frame_buf)
2031                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2032                                                reason, tx, frame_buf);
2033
2034         /* flush out frame - make sure the deauth was actually sent */
2035         if (tx)
2036                 ieee80211_flush_queues(local, sdata, false);
2037
2038         /* clear bssid only after building the needed mgmt frames */
2039         eth_zero_addr(ifmgd->bssid);
2040
2041         /* remove AP and TDLS peers */
2042         sta_info_flush(sdata);
2043
2044         /* finally reset all BSS / config parameters */
2045         changed |= ieee80211_reset_erp_info(sdata);
2046
2047         ieee80211_led_assoc(local, 0);
2048         changed |= BSS_CHANGED_ASSOC;
2049         sdata->vif.bss_conf.assoc = false;
2050
2051         ifmgd->p2p_noa_index = -1;
2052         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2053                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2054
2055         /* on the next assoc, re-program HT/VHT parameters */
2056         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2057         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2058         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2059         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2060
2061         /* reset MU-MIMO ownership and group data */
2062         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2063                sizeof(sdata->vif.bss_conf.mu_group.membership));
2064         memset(sdata->vif.bss_conf.mu_group.position, 0,
2065                sizeof(sdata->vif.bss_conf.mu_group.position));
2066         changed |= BSS_CHANGED_MU_GROUPS;
2067         sdata->vif.mu_mimo_owner = false;
2068
2069         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2070
2071         del_timer_sync(&local->dynamic_ps_timer);
2072         cancel_work_sync(&local->dynamic_ps_enable_work);
2073
2074         /* Disable ARP filtering */
2075         if (sdata->vif.bss_conf.arp_addr_cnt)
2076                 changed |= BSS_CHANGED_ARP_FILTER;
2077
2078         sdata->vif.bss_conf.qos = false;
2079         changed |= BSS_CHANGED_QOS;
2080
2081         /* The BSSID (not really interesting) and HT changed */
2082         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2083         ieee80211_bss_info_change_notify(sdata, changed);
2084
2085         /* disassociated - set to defaults now */
2086         ieee80211_set_wmm_default(sdata, false, false);
2087
2088         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2089         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2090         del_timer_sync(&sdata->u.mgd.timer);
2091         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2092
2093         sdata->vif.bss_conf.dtim_period = 0;
2094         sdata->vif.bss_conf.beacon_rate = NULL;
2095
2096         ifmgd->have_beacon = false;
2097
2098         ifmgd->flags = 0;
2099         mutex_lock(&local->mtx);
2100         ieee80211_vif_release_channel(sdata);
2101
2102         sdata->vif.csa_active = false;
2103         ifmgd->csa_waiting_bcn = false;
2104         ifmgd->csa_ignored_same_chan = false;
2105         if (sdata->csa_block_tx) {
2106                 ieee80211_wake_vif_queues(local, sdata,
2107                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2108                 sdata->csa_block_tx = false;
2109         }
2110         mutex_unlock(&local->mtx);
2111
2112         /* existing TX TSPEC sessions no longer exist */
2113         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2114         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2115
2116         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2117 }
2118
2119 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2120                              struct ieee80211_hdr *hdr)
2121 {
2122         /*
2123          * We can postpone the mgd.timer whenever receiving unicast frames
2124          * from AP because we know that the connection is working both ways
2125          * at that time. But multicast frames (and hence also beacons) must
2126          * be ignored here, because we need to trigger the timer during
2127          * data idle periods for sending the periodic probe request to the
2128          * AP we're connected to.
2129          */
2130         if (is_multicast_ether_addr(hdr->addr1))
2131                 return;
2132
2133         ieee80211_sta_reset_conn_monitor(sdata);
2134 }
2135
2136 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2137 {
2138         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2139         struct ieee80211_local *local = sdata->local;
2140
2141         mutex_lock(&local->mtx);
2142         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2143                 goto out;
2144
2145         __ieee80211_stop_poll(sdata);
2146
2147         mutex_lock(&local->iflist_mtx);
2148         ieee80211_recalc_ps(local);
2149         mutex_unlock(&local->iflist_mtx);
2150
2151         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2152                 goto out;
2153
2154         /*
2155          * We've received a probe response, but are not sure whether
2156          * we have or will be receiving any beacons or data, so let's
2157          * schedule the timers again, just in case.
2158          */
2159         ieee80211_sta_reset_beacon_monitor(sdata);
2160
2161         mod_timer(&ifmgd->conn_mon_timer,
2162                   round_jiffies_up(jiffies +
2163                                    IEEE80211_CONNECTION_IDLE_TIME));
2164 out:
2165         mutex_unlock(&local->mtx);
2166 }
2167
2168 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2169                                            struct ieee80211_hdr *hdr,
2170                                            u16 tx_time)
2171 {
2172         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2173         u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2174         int ac = ieee80211_ac_from_tid(tid);
2175         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2176         unsigned long now = jiffies;
2177
2178         if (likely(!tx_tspec->admitted_time))
2179                 return;
2180
2181         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2182                 tx_tspec->consumed_tx_time = 0;
2183                 tx_tspec->time_slice_start = now;
2184
2185                 if (tx_tspec->downgraded) {
2186                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2187                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2188                 }
2189         }
2190
2191         if (tx_tspec->downgraded)
2192                 return;
2193
2194         tx_tspec->consumed_tx_time += tx_time;
2195
2196         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2197                 tx_tspec->downgraded = true;
2198                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2199                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2200         }
2201 }
2202
2203 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2204                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2205 {
2206         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2207
2208         if (!ieee80211_is_data(hdr->frame_control))
2209             return;
2210
2211         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2212             sdata->u.mgd.probe_send_count > 0) {
2213                 if (ack)
2214                         ieee80211_sta_reset_conn_monitor(sdata);
2215                 else
2216                         sdata->u.mgd.nullfunc_failed = true;
2217                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2218                 return;
2219         }
2220
2221         if (ack)
2222                 ieee80211_sta_reset_conn_monitor(sdata);
2223 }
2224
2225 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2226 {
2227         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2228         const u8 *ssid;
2229         u8 *dst = ifmgd->associated->bssid;
2230         u8 unicast_limit = max(1, max_probe_tries - 3);
2231         struct sta_info *sta;
2232
2233         /*
2234          * Try sending broadcast probe requests for the last three
2235          * probe requests after the first ones failed since some
2236          * buggy APs only support broadcast probe requests.
2237          */
2238         if (ifmgd->probe_send_count >= unicast_limit)
2239                 dst = NULL;
2240
2241         /*
2242          * When the hardware reports an accurate Tx ACK status, it's
2243          * better to send a nullfunc frame instead of a probe request,
2244          * as it will kick us off the AP quickly if we aren't associated
2245          * anymore. The timeout will be reset if the frame is ACKed by
2246          * the AP.
2247          */
2248         ifmgd->probe_send_count++;
2249
2250         if (dst) {
2251                 mutex_lock(&sdata->local->sta_mtx);
2252                 sta = sta_info_get(sdata, dst);
2253                 if (!WARN_ON(!sta))
2254                         ieee80211_check_fast_rx(sta);
2255                 mutex_unlock(&sdata->local->sta_mtx);
2256         }
2257
2258         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2259                 ifmgd->nullfunc_failed = false;
2260                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2261         } else {
2262                 int ssid_len;
2263
2264                 rcu_read_lock();
2265                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2266                 if (WARN_ON_ONCE(ssid == NULL))
2267                         ssid_len = 0;
2268                 else
2269                         ssid_len = ssid[1];
2270
2271                 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2272                                          ssid + 2, ssid_len, NULL,
2273                                          0, (u32) -1, true, 0,
2274                                          ifmgd->associated->channel, false);
2275                 rcu_read_unlock();
2276         }
2277
2278         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2279         run_again(sdata, ifmgd->probe_timeout);
2280 }
2281
2282 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2283                                    bool beacon)
2284 {
2285         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2286         bool already = false;
2287
2288         if (!ieee80211_sdata_running(sdata))
2289                 return;
2290
2291         sdata_lock(sdata);
2292
2293         if (!ifmgd->associated)
2294                 goto out;
2295
2296         mutex_lock(&sdata->local->mtx);
2297
2298         if (sdata->local->tmp_channel || sdata->local->scanning) {
2299                 mutex_unlock(&sdata->local->mtx);
2300                 goto out;
2301         }
2302
2303         if (beacon) {
2304                 mlme_dbg_ratelimited(sdata,
2305                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2306                                      beacon_loss_count);
2307
2308                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2309         }
2310
2311         /*
2312          * The driver/our work has already reported this event or the
2313          * connection monitoring has kicked in and we have already sent
2314          * a probe request. Or maybe the AP died and the driver keeps
2315          * reporting until we disassociate...
2316          *
2317          * In either case we have to ignore the current call to this
2318          * function (except for setting the correct probe reason bit)
2319          * because otherwise we would reset the timer every time and
2320          * never check whether we received a probe response!
2321          */
2322         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2323                 already = true;
2324
2325         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2326
2327         mutex_unlock(&sdata->local->mtx);
2328
2329         if (already)
2330                 goto out;
2331
2332         mutex_lock(&sdata->local->iflist_mtx);
2333         ieee80211_recalc_ps(sdata->local);
2334         mutex_unlock(&sdata->local->iflist_mtx);
2335
2336         ifmgd->probe_send_count = 0;
2337         ieee80211_mgd_probe_ap_send(sdata);
2338  out:
2339         sdata_unlock(sdata);
2340 }
2341
2342 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2343                                           struct ieee80211_vif *vif)
2344 {
2345         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2346         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2347         struct cfg80211_bss *cbss;
2348         struct sk_buff *skb;
2349         const u8 *ssid;
2350         int ssid_len;
2351
2352         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2353                 return NULL;
2354
2355         sdata_assert_lock(sdata);
2356
2357         if (ifmgd->associated)
2358                 cbss = ifmgd->associated;
2359         else if (ifmgd->auth_data)
2360                 cbss = ifmgd->auth_data->bss;
2361         else if (ifmgd->assoc_data)
2362                 cbss = ifmgd->assoc_data->bss;
2363         else
2364                 return NULL;
2365
2366         rcu_read_lock();
2367         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2368         if (WARN_ON_ONCE(ssid == NULL))
2369                 ssid_len = 0;
2370         else
2371                 ssid_len = ssid[1];
2372
2373         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2374                                         (u32) -1, cbss->channel,
2375                                         ssid + 2, ssid_len,
2376                                         NULL, 0, true);
2377         rcu_read_unlock();
2378
2379         return skb;
2380 }
2381 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2382
2383 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2384                                         const u8 *buf, size_t len, bool tx,
2385                                         u16 reason)
2386 {
2387         struct ieee80211_event event = {
2388                 .type = MLME_EVENT,
2389                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2390                 .u.mlme.reason = reason,
2391         };
2392
2393         if (tx)
2394                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2395         else
2396                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2397
2398         drv_event_callback(sdata->local, sdata, &event);
2399 }
2400
2401 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2402 {
2403         struct ieee80211_local *local = sdata->local;
2404         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2405         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2406
2407         sdata_lock(sdata);
2408         if (!ifmgd->associated) {
2409                 sdata_unlock(sdata);
2410                 return;
2411         }
2412
2413         /* AP is probably out of range (or not reachable for another reason) so
2414          * remove the bss struct for that AP.
2415          */
2416         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2417
2418         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2419                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2420                                true, frame_buf);
2421         mutex_lock(&local->mtx);
2422         sdata->vif.csa_active = false;
2423         ifmgd->csa_waiting_bcn = false;
2424         if (sdata->csa_block_tx) {
2425                 ieee80211_wake_vif_queues(local, sdata,
2426                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2427                 sdata->csa_block_tx = false;
2428         }
2429         mutex_unlock(&local->mtx);
2430
2431         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2432                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2433
2434         sdata_unlock(sdata);
2435 }
2436
2437 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2438 {
2439         struct ieee80211_sub_if_data *sdata =
2440                 container_of(work, struct ieee80211_sub_if_data,
2441                              u.mgd.beacon_connection_loss_work);
2442         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2443
2444         if (ifmgd->associated)
2445                 ifmgd->beacon_loss_count++;
2446
2447         if (ifmgd->connection_loss) {
2448                 sdata_info(sdata, "Connection to AP %pM lost\n",
2449                            ifmgd->bssid);
2450                 __ieee80211_disconnect(sdata);
2451         } else {
2452                 ieee80211_mgd_probe_ap(sdata, true);
2453         }
2454 }
2455
2456 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2457 {
2458         struct ieee80211_sub_if_data *sdata =
2459                 container_of(work, struct ieee80211_sub_if_data,
2460                              u.mgd.csa_connection_drop_work);
2461
2462         __ieee80211_disconnect(sdata);
2463 }
2464
2465 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2466 {
2467         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2468         struct ieee80211_hw *hw = &sdata->local->hw;
2469
2470         trace_api_beacon_loss(sdata);
2471
2472         sdata->u.mgd.connection_loss = false;
2473         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2474 }
2475 EXPORT_SYMBOL(ieee80211_beacon_loss);
2476
2477 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2478 {
2479         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2480         struct ieee80211_hw *hw = &sdata->local->hw;
2481
2482         trace_api_connection_loss(sdata);
2483
2484         sdata->u.mgd.connection_loss = true;
2485         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2486 }
2487 EXPORT_SYMBOL(ieee80211_connection_loss);
2488
2489
2490 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2491                                         bool assoc)
2492 {
2493         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2494
2495         sdata_assert_lock(sdata);
2496
2497         if (!assoc) {
2498                 /*
2499                  * we are not authenticated yet, the only timer that could be
2500                  * running is the timeout for the authentication response which
2501                  * which is not relevant anymore.
2502                  */
2503                 del_timer_sync(&sdata->u.mgd.timer);
2504                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2505
2506                 eth_zero_addr(sdata->u.mgd.bssid);
2507                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2508                 sdata->u.mgd.flags = 0;
2509                 mutex_lock(&sdata->local->mtx);
2510                 ieee80211_vif_release_channel(sdata);
2511                 mutex_unlock(&sdata->local->mtx);
2512         }
2513
2514         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2515         kfree(auth_data);
2516         sdata->u.mgd.auth_data = NULL;
2517 }
2518
2519 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2520                                          bool assoc, bool abandon)
2521 {
2522         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2523
2524         sdata_assert_lock(sdata);
2525
2526         if (!assoc) {
2527                 /*
2528                  * we are not associated yet, the only timer that could be
2529                  * running is the timeout for the association response which
2530                  * which is not relevant anymore.
2531                  */
2532                 del_timer_sync(&sdata->u.mgd.timer);
2533                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2534
2535                 eth_zero_addr(sdata->u.mgd.bssid);
2536                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2537                 sdata->u.mgd.flags = 0;
2538                 sdata->vif.mu_mimo_owner = false;
2539
2540                 mutex_lock(&sdata->local->mtx);
2541                 ieee80211_vif_release_channel(sdata);
2542                 mutex_unlock(&sdata->local->mtx);
2543
2544                 if (abandon)
2545                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2546         }
2547
2548         kfree(assoc_data);
2549         sdata->u.mgd.assoc_data = NULL;
2550 }
2551
2552 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2553                                      struct ieee80211_mgmt *mgmt, size_t len)
2554 {
2555         struct ieee80211_local *local = sdata->local;
2556         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2557         u8 *pos;
2558         struct ieee802_11_elems elems;
2559         u32 tx_flags = 0;
2560
2561         pos = mgmt->u.auth.variable;
2562         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2563         if (!elems.challenge)
2564                 return;
2565         auth_data->expected_transaction = 4;
2566         drv_mgd_prepare_tx(sdata->local, sdata);
2567         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2568                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2569                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2570         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2571                             elems.challenge - 2, elems.challenge_len + 2,
2572                             auth_data->bss->bssid, auth_data->bss->bssid,
2573                             auth_data->key, auth_data->key_len,
2574                             auth_data->key_idx, tx_flags);
2575 }
2576
2577 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2578                                    struct ieee80211_mgmt *mgmt, size_t len)
2579 {
2580         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2581         u8 bssid[ETH_ALEN];
2582         u16 auth_alg, auth_transaction, status_code;
2583         struct sta_info *sta;
2584         struct ieee80211_event event = {
2585                 .type = MLME_EVENT,
2586                 .u.mlme.data = AUTH_EVENT,
2587         };
2588
2589         sdata_assert_lock(sdata);
2590
2591         if (len < 24 + 6)
2592                 return;
2593
2594         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2595                 return;
2596
2597         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2598
2599         if (!ether_addr_equal(bssid, mgmt->bssid))
2600                 return;
2601
2602         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2603         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2604         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2605
2606         if (auth_alg != ifmgd->auth_data->algorithm ||
2607             auth_transaction != ifmgd->auth_data->expected_transaction) {
2608                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2609                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2610                            auth_transaction,
2611                            ifmgd->auth_data->expected_transaction);
2612                 return;
2613         }
2614
2615         if (status_code != WLAN_STATUS_SUCCESS) {
2616                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2617                            mgmt->sa, status_code);
2618                 ieee80211_destroy_auth_data(sdata, false);
2619                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2620                 event.u.mlme.status = MLME_DENIED;
2621                 event.u.mlme.reason = status_code;
2622                 drv_event_callback(sdata->local, sdata, &event);
2623                 return;
2624         }
2625
2626         switch (ifmgd->auth_data->algorithm) {
2627         case WLAN_AUTH_OPEN:
2628         case WLAN_AUTH_LEAP:
2629         case WLAN_AUTH_FT:
2630         case WLAN_AUTH_SAE:
2631         case WLAN_AUTH_FILS_SK:
2632         case WLAN_AUTH_FILS_SK_PFS:
2633         case WLAN_AUTH_FILS_PK:
2634                 break;
2635         case WLAN_AUTH_SHARED_KEY:
2636                 if (ifmgd->auth_data->expected_transaction != 4) {
2637                         ieee80211_auth_challenge(sdata, mgmt, len);
2638                         /* need another frame */
2639                         return;
2640                 }
2641                 break;
2642         default:
2643                 WARN_ONCE(1, "invalid auth alg %d",
2644                           ifmgd->auth_data->algorithm);
2645                 return;
2646         }
2647
2648         event.u.mlme.status = MLME_SUCCESS;
2649         drv_event_callback(sdata->local, sdata, &event);
2650         sdata_info(sdata, "authenticated\n");
2651         ifmgd->auth_data->done = true;
2652         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2653         ifmgd->auth_data->timeout_started = true;
2654         run_again(sdata, ifmgd->auth_data->timeout);
2655
2656         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2657             ifmgd->auth_data->expected_transaction != 2) {
2658                 /*
2659                  * Report auth frame to user space for processing since another
2660                  * round of Authentication frames is still needed.
2661                  */
2662                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2663                 return;
2664         }
2665
2666         /* move station state to auth */
2667         mutex_lock(&sdata->local->sta_mtx);
2668         sta = sta_info_get(sdata, bssid);
2669         if (!sta) {
2670                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2671                 goto out_err;
2672         }
2673         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2674                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2675                 goto out_err;
2676         }
2677         mutex_unlock(&sdata->local->sta_mtx);
2678
2679         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2680         return;
2681  out_err:
2682         mutex_unlock(&sdata->local->sta_mtx);
2683         /* ignore frame -- wait for timeout */
2684 }
2685
2686 #define case_WLAN(type) \
2687         case WLAN_REASON_##type: return #type
2688
2689 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2690 {
2691         switch (reason_code) {
2692         case_WLAN(UNSPECIFIED);
2693         case_WLAN(PREV_AUTH_NOT_VALID);
2694         case_WLAN(DEAUTH_LEAVING);
2695         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2696         case_WLAN(DISASSOC_AP_BUSY);
2697         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2698         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2699         case_WLAN(DISASSOC_STA_HAS_LEFT);
2700         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2701         case_WLAN(DISASSOC_BAD_POWER);
2702         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2703         case_WLAN(INVALID_IE);
2704         case_WLAN(MIC_FAILURE);
2705         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2706         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2707         case_WLAN(IE_DIFFERENT);
2708         case_WLAN(INVALID_GROUP_CIPHER);
2709         case_WLAN(INVALID_PAIRWISE_CIPHER);
2710         case_WLAN(INVALID_AKMP);
2711         case_WLAN(UNSUPP_RSN_VERSION);
2712         case_WLAN(INVALID_RSN_IE_CAP);
2713         case_WLAN(IEEE8021X_FAILED);
2714         case_WLAN(CIPHER_SUITE_REJECTED);
2715         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2716         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2717         case_WLAN(DISASSOC_LOW_ACK);
2718         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2719         case_WLAN(QSTA_LEAVE_QBSS);
2720         case_WLAN(QSTA_NOT_USE);
2721         case_WLAN(QSTA_REQUIRE_SETUP);
2722         case_WLAN(QSTA_TIMEOUT);
2723         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2724         case_WLAN(MESH_PEER_CANCELED);
2725         case_WLAN(MESH_MAX_PEERS);
2726         case_WLAN(MESH_CONFIG);
2727         case_WLAN(MESH_CLOSE);
2728         case_WLAN(MESH_MAX_RETRIES);
2729         case_WLAN(MESH_CONFIRM_TIMEOUT);
2730         case_WLAN(MESH_INVALID_GTK);
2731         case_WLAN(MESH_INCONSISTENT_PARAM);
2732         case_WLAN(MESH_INVALID_SECURITY);
2733         case_WLAN(MESH_PATH_ERROR);
2734         case_WLAN(MESH_PATH_NOFORWARD);
2735         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2736         case_WLAN(MAC_EXISTS_IN_MBSS);
2737         case_WLAN(MESH_CHAN_REGULATORY);
2738         case_WLAN(MESH_CHAN);
2739         default: return "<unknown>";
2740         }
2741 }
2742
2743 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2744                                      struct ieee80211_mgmt *mgmt, size_t len)
2745 {
2746         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2747         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2748
2749         sdata_assert_lock(sdata);
2750
2751         if (len < 24 + 2)
2752                 return;
2753
2754         if (ifmgd->associated &&
2755             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2756                 const u8 *bssid = ifmgd->associated->bssid;
2757
2758                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2759                            bssid, reason_code,
2760                            ieee80211_get_reason_code_string(reason_code));
2761
2762                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2763
2764                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2765                                             reason_code);
2766                 return;
2767         }
2768
2769         if (ifmgd->assoc_data &&
2770             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2771                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2772
2773                 sdata_info(sdata,
2774                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2775                            bssid, reason_code,
2776                            ieee80211_get_reason_code_string(reason_code));
2777
2778                 ieee80211_destroy_assoc_data(sdata, false, true);
2779
2780                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2781                 return;
2782         }
2783 }
2784
2785
2786 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2787                                        struct ieee80211_mgmt *mgmt, size_t len)
2788 {
2789         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2790         u16 reason_code;
2791
2792         sdata_assert_lock(sdata);
2793
2794         if (len < 24 + 2)
2795                 return;
2796
2797         if (!ifmgd->associated ||
2798             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2799                 return;
2800
2801         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2802
2803         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2804                    mgmt->sa, reason_code,
2805                    ieee80211_get_reason_code_string(reason_code));
2806
2807         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2808
2809         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2810 }
2811
2812 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2813                                 u8 *supp_rates, unsigned int supp_rates_len,
2814                                 u32 *rates, u32 *basic_rates,
2815                                 bool *have_higher_than_11mbit,
2816                                 int *min_rate, int *min_rate_index,
2817                                 int shift)
2818 {
2819         int i, j;
2820
2821         for (i = 0; i < supp_rates_len; i++) {
2822                 int rate = supp_rates[i] & 0x7f;
2823                 bool is_basic = !!(supp_rates[i] & 0x80);
2824
2825                 if ((rate * 5 * (1 << shift)) > 110)
2826                         *have_higher_than_11mbit = true;
2827
2828                 /*
2829                  * Skip HT and VHT BSS membership selectors since they're not
2830                  * rates.
2831                  *
2832                  * Note: Even though the membership selector and the basic
2833                  *       rate flag share the same bit, they are not exactly
2834                  *       the same.
2835                  */
2836                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
2837                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
2838                         continue;
2839
2840                 for (j = 0; j < sband->n_bitrates; j++) {
2841                         struct ieee80211_rate *br;
2842                         int brate;
2843
2844                         br = &sband->bitrates[j];
2845
2846                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2847                         if (brate == rate) {
2848                                 *rates |= BIT(j);
2849                                 if (is_basic)
2850                                         *basic_rates |= BIT(j);
2851                                 if ((rate * 5) < *min_rate) {
2852                                         *min_rate = rate * 5;
2853                                         *min_rate_index = j;
2854                                 }
2855                                 break;
2856                         }
2857                 }
2858         }
2859 }
2860
2861 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2862                                     struct cfg80211_bss *cbss,
2863                                     struct ieee80211_mgmt *mgmt, size_t len)
2864 {
2865         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2866         struct ieee80211_local *local = sdata->local;
2867         struct ieee80211_supported_band *sband;
2868         struct sta_info *sta;
2869         u8 *pos;
2870         u16 capab_info, aid;
2871         struct ieee802_11_elems elems;
2872         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2873         const struct cfg80211_bss_ies *bss_ies = NULL;
2874         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2875         u32 changed = 0;
2876         int err;
2877         bool ret;
2878
2879         /* AssocResp and ReassocResp have identical structure */
2880
2881         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2882         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2883
2884         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2885                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2886                            aid);
2887         aid &= ~(BIT(15) | BIT(14));
2888
2889         ifmgd->broken_ap = false;
2890
2891         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2892                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2893                            aid);
2894                 aid = 0;
2895                 ifmgd->broken_ap = true;
2896         }
2897
2898         pos = mgmt->u.assoc_resp.variable;
2899         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2900
2901         if (!elems.supp_rates) {
2902                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2903                 return false;
2904         }
2905
2906         ifmgd->aid = aid;
2907         ifmgd->tdls_chan_switch_prohibited =
2908                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2909                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2910
2911         /*
2912          * Some APs are erroneously not including some information in their
2913          * (re)association response frames. Try to recover by using the data
2914          * from the beacon or probe response. This seems to afflict mobile
2915          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2916          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2917          */
2918         if ((assoc_data->wmm && !elems.wmm_param) ||
2919             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2920              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2921             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2922              (!elems.vht_cap_elem || !elems.vht_operation))) {
2923                 const struct cfg80211_bss_ies *ies;
2924                 struct ieee802_11_elems bss_elems;
2925
2926                 rcu_read_lock();
2927                 ies = rcu_dereference(cbss->ies);
2928                 if (ies)
2929                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2930                                           GFP_ATOMIC);
2931                 rcu_read_unlock();
2932                 if (!bss_ies)
2933                         return false;
2934
2935                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2936                                        false, &bss_elems);
2937                 if (assoc_data->wmm &&
2938                     !elems.wmm_param && bss_elems.wmm_param) {
2939                         elems.wmm_param = bss_elems.wmm_param;
2940                         sdata_info(sdata,
2941                                    "AP bug: WMM param missing from AssocResp\n");
2942                 }
2943
2944                 /*
2945                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2946                  * have to include the IEs in the (re)association response.
2947                  */
2948                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2949                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2950                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2951                         sdata_info(sdata,
2952                                    "AP bug: HT capability missing from AssocResp\n");
2953                 }
2954                 if (!elems.ht_operation && bss_elems.ht_operation &&
2955                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2956                         elems.ht_operation = bss_elems.ht_operation;
2957                         sdata_info(sdata,
2958                                    "AP bug: HT operation missing from AssocResp\n");
2959                 }
2960                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2961                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2962                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2963                         sdata_info(sdata,
2964                                    "AP bug: VHT capa missing from AssocResp\n");
2965                 }
2966                 if (!elems.vht_operation && bss_elems.vht_operation &&
2967                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2968                         elems.vht_operation = bss_elems.vht_operation;
2969                         sdata_info(sdata,
2970                                    "AP bug: VHT operation missing from AssocResp\n");
2971                 }
2972         }
2973
2974         /*
2975          * We previously checked these in the beacon/probe response, so
2976          * they should be present here. This is just a safety net.
2977          */
2978         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2979             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2980                 sdata_info(sdata,
2981                            "HT AP is missing WMM params or HT capability/operation\n");
2982                 ret = false;
2983                 goto out;
2984         }
2985
2986         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2987             (!elems.vht_cap_elem || !elems.vht_operation)) {
2988                 sdata_info(sdata,
2989                            "VHT AP is missing VHT capability/operation\n");
2990                 ret = false;
2991                 goto out;
2992         }
2993
2994         mutex_lock(&sdata->local->sta_mtx);
2995         /*
2996          * station info was already allocated and inserted before
2997          * the association and should be available to us
2998          */
2999         sta = sta_info_get(sdata, cbss->bssid);
3000         if (WARN_ON(!sta)) {
3001                 mutex_unlock(&sdata->local->sta_mtx);
3002                 ret = false;
3003                 goto out;
3004         }
3005
3006         sband = ieee80211_get_sband(sdata);
3007         if (!sband) {
3008                 mutex_unlock(&sdata->local->sta_mtx);
3009                 ret = false;
3010                 goto out;
3011         }
3012
3013         /* Set up internal HT/VHT capabilities */
3014         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3015                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3016                                                   elems.ht_cap_elem, sta);
3017
3018         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3019                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3020                                                     elems.vht_cap_elem, sta);
3021
3022         /*
3023          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3024          * in their association response, so ignore that data for our own
3025          * configuration. If it changed since the last beacon, we'll get the
3026          * next beacon and update then.
3027          */
3028
3029         /*
3030          * If an operating mode notification IE is present, override the
3031          * NSS calculation (that would be done in rate_control_rate_init())
3032          * and use the # of streams from that element.
3033          */
3034         if (elems.opmode_notif &&
3035             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3036                 u8 nss;
3037
3038                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3039                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3040                 nss += 1;
3041                 sta->sta.rx_nss = nss;
3042         }
3043
3044         rate_control_rate_init(sta);
3045
3046         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3047                 set_sta_flag(sta, WLAN_STA_MFP);
3048                 sta->sta.mfp = true;
3049         } else {
3050                 sta->sta.mfp = false;
3051         }
3052
3053         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3054
3055         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3056         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3057                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3058         if (err) {
3059                 sdata_info(sdata,
3060                            "failed to move station %pM to desired state\n",
3061                            sta->sta.addr);
3062                 WARN_ON(__sta_info_destroy(sta));
3063                 mutex_unlock(&sdata->local->sta_mtx);
3064                 ret = false;
3065                 goto out;
3066         }
3067
3068         mutex_unlock(&sdata->local->sta_mtx);
3069
3070         /*
3071          * Always handle WMM once after association regardless
3072          * of the first value the AP uses. Setting -1 here has
3073          * that effect because the AP values is an unsigned
3074          * 4-bit value.
3075          */
3076         ifmgd->wmm_last_param_set = -1;
3077
3078         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3079                 ieee80211_set_wmm_default(sdata, false, false);
3080         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3081                                              elems.wmm_param_len)) {
3082                 /* still enable QoS since we might have HT/VHT */
3083                 ieee80211_set_wmm_default(sdata, false, true);
3084                 /* set the disable-WMM flag in this case to disable
3085                  * tracking WMM parameter changes in the beacon if
3086                  * the parameters weren't actually valid. Doing so
3087                  * avoids changing parameters very strangely when
3088                  * the AP is going back and forth between valid and
3089                  * invalid parameters.
3090                  */
3091                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3092         }
3093         changed |= BSS_CHANGED_QOS;
3094
3095         if (elems.max_idle_period_ie) {
3096                 bss_conf->max_idle_period =
3097                         le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3098                 bss_conf->protected_keep_alive =
3099                         !!(elems.max_idle_period_ie->idle_options &
3100                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3101                 changed |= BSS_CHANGED_KEEP_ALIVE;
3102         } else {
3103                 bss_conf->max_idle_period = 0;
3104                 bss_conf->protected_keep_alive = false;
3105         }
3106
3107         /* set AID and assoc capability,
3108          * ieee80211_set_associated() will tell the driver */
3109         bss_conf->aid = aid;
3110         bss_conf->assoc_capability = capab_info;
3111         ieee80211_set_associated(sdata, cbss, changed);
3112
3113         /*
3114          * If we're using 4-addr mode, let the AP know that we're
3115          * doing so, so that it can create the STA VLAN on its side
3116          */
3117         if (ifmgd->use_4addr)
3118                 ieee80211_send_4addr_nullfunc(local, sdata);
3119
3120         /*
3121          * Start timer to probe the connection to the AP now.
3122          * Also start the timer that will detect beacon loss.
3123          */
3124         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3125         ieee80211_sta_reset_beacon_monitor(sdata);
3126
3127         ret = true;
3128  out:
3129         kfree(bss_ies);
3130         return ret;
3131 }
3132
3133 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3134                                          struct ieee80211_mgmt *mgmt,
3135                                          size_t len)
3136 {
3137         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3138         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3139         u16 capab_info, status_code, aid;
3140         struct ieee802_11_elems elems;
3141         int ac, uapsd_queues = -1;
3142         u8 *pos;
3143         bool reassoc;
3144         struct cfg80211_bss *bss;
3145         struct ieee80211_event event = {
3146                 .type = MLME_EVENT,
3147                 .u.mlme.data = ASSOC_EVENT,
3148         };
3149
3150         sdata_assert_lock(sdata);
3151
3152         if (!assoc_data)
3153                 return;
3154         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3155                 return;
3156
3157         /*
3158          * AssocResp and ReassocResp have identical structure, so process both
3159          * of them in this function.
3160          */
3161
3162         if (len < 24 + 6)
3163                 return;
3164
3165         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3166         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3167         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3168         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3169
3170         sdata_info(sdata,
3171                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3172                    reassoc ? "Rea" : "A", mgmt->sa,
3173                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3174
3175         if (assoc_data->fils_kek_len &&
3176             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3177                 return;
3178
3179         pos = mgmt->u.assoc_resp.variable;
3180         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3181
3182         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3183             elems.timeout_int &&
3184             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3185                 u32 tu, ms;
3186                 tu = le32_to_cpu(elems.timeout_int->value);
3187                 ms = tu * 1024 / 1000;
3188                 sdata_info(sdata,
3189                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3190                            mgmt->sa, tu, ms);
3191                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3192                 assoc_data->timeout_started = true;
3193                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3194                         run_again(sdata, assoc_data->timeout);
3195                 return;
3196         }
3197
3198         bss = assoc_data->bss;
3199
3200         if (status_code != WLAN_STATUS_SUCCESS) {
3201                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3202                            mgmt->sa, status_code);
3203                 ieee80211_destroy_assoc_data(sdata, false, false);
3204                 event.u.mlme.status = MLME_DENIED;
3205                 event.u.mlme.reason = status_code;
3206                 drv_event_callback(sdata->local, sdata, &event);
3207         } else {
3208                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3209                         /* oops -- internal error -- send timeout for now */
3210                         ieee80211_destroy_assoc_data(sdata, false, false);
3211                         cfg80211_assoc_timeout(sdata->dev, bss);
3212                         return;
3213                 }
3214                 event.u.mlme.status = MLME_SUCCESS;
3215                 drv_event_callback(sdata->local, sdata, &event);
3216                 sdata_info(sdata, "associated\n");
3217
3218                 /*
3219                  * destroy assoc_data afterwards, as otherwise an idle
3220                  * recalc after assoc_data is NULL but before associated
3221                  * is set can cause the interface to go idle
3222                  */
3223                 ieee80211_destroy_assoc_data(sdata, true, false);
3224
3225                 /* get uapsd queues configuration */
3226                 uapsd_queues = 0;
3227                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3228                         if (sdata->tx_conf[ac].uapsd)
3229                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3230         }
3231
3232         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3233 }
3234
3235 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3236                                   struct ieee80211_mgmt *mgmt, size_t len,
3237                                   struct ieee80211_rx_status *rx_status,
3238                                   struct ieee802_11_elems *elems)
3239 {
3240         struct ieee80211_local *local = sdata->local;
3241         struct ieee80211_bss *bss;
3242         struct ieee80211_channel *channel;
3243
3244         sdata_assert_lock(sdata);
3245
3246         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3247         if (!channel)
3248                 return;
3249
3250         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3251                                         channel);
3252         if (bss) {
3253                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3254                 ieee80211_rx_bss_put(local, bss);
3255         }
3256 }
3257
3258
3259 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3260                                          struct sk_buff *skb)
3261 {
3262         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3263         struct ieee80211_if_managed *ifmgd;
3264         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3265         size_t baselen, len = skb->len;
3266         struct ieee802_11_elems elems;
3267
3268         ifmgd = &sdata->u.mgd;
3269
3270         sdata_assert_lock(sdata);
3271
3272         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3273                 return; /* ignore ProbeResp to foreign address */
3274
3275         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3276         if (baselen > len)
3277                 return;
3278
3279         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3280                                false, &elems);
3281
3282         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3283
3284         if (ifmgd->associated &&
3285             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3286                 ieee80211_reset_ap_probe(sdata);
3287 }
3288
3289 /*
3290  * This is the canonical list of information elements we care about,
3291  * the filter code also gives us all changes to the Microsoft OUI
3292  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3293  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3294  * changes to requested client power.
3295  *
3296  * We implement beacon filtering in software since that means we can
3297  * avoid processing the frame here and in cfg80211, and userspace
3298  * will not be able to tell whether the hardware supports it or not.
3299  *
3300  * XXX: This list needs to be dynamic -- userspace needs to be able to
3301  *      add items it requires. It also needs to be able to tell us to
3302  *      look out for other vendor IEs.
3303  */
3304 static const u64 care_about_ies =
3305         (1ULL << WLAN_EID_COUNTRY) |
3306         (1ULL << WLAN_EID_ERP_INFO) |
3307         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3308         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3309         (1ULL << WLAN_EID_HT_CAPABILITY) |
3310         (1ULL << WLAN_EID_HT_OPERATION) |
3311         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3312
3313 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3314                                      struct ieee80211_mgmt *mgmt, size_t len,
3315                                      struct ieee80211_rx_status *rx_status)
3316 {
3317         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3318         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3319         size_t baselen;
3320         struct ieee802_11_elems elems;
3321         struct ieee80211_local *local = sdata->local;
3322         struct ieee80211_chanctx_conf *chanctx_conf;
3323         struct ieee80211_channel *chan;
3324         struct sta_info *sta;
3325         u32 changed = 0;
3326         bool erp_valid;
3327         u8 erp_value = 0;
3328         u32 ncrc;
3329         u8 *bssid;
3330         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3331
3332         sdata_assert_lock(sdata);
3333
3334         /* Process beacon from the current BSS */
3335         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3336         if (baselen > len)
3337                 return;
3338
3339         rcu_read_lock();
3340         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3341         if (!chanctx_conf) {
3342                 rcu_read_unlock();
3343                 return;
3344         }
3345
3346         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3347                 rcu_read_unlock();
3348                 return;
3349         }
3350         chan = chanctx_conf->def.chan;
3351         rcu_read_unlock();
3352
3353         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3354             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3355                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3356                                        len - baselen, false, &elems);
3357
3358                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3359                 if (elems.tim && !elems.parse_error) {
3360                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3361                         ifmgd->dtim_period = tim_ie->dtim_period;
3362                 }
3363                 ifmgd->have_beacon = true;
3364                 ifmgd->assoc_data->need_beacon = false;
3365                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3366                         sdata->vif.bss_conf.sync_tsf =
3367                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3368                         sdata->vif.bss_conf.sync_device_ts =
3369                                 rx_status->device_timestamp;
3370                         if (elems.tim)
3371                                 sdata->vif.bss_conf.sync_dtim_count =
3372                                         elems.tim->dtim_count;
3373                         else
3374                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3375                 }
3376                 /* continue assoc process */
3377                 ifmgd->assoc_data->timeout = jiffies;
3378                 ifmgd->assoc_data->timeout_started = true;
3379                 run_again(sdata, ifmgd->assoc_data->timeout);
3380                 return;
3381         }
3382
3383         if (!ifmgd->associated ||
3384             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3385                 return;
3386         bssid = ifmgd->associated->bssid;
3387
3388         /* Track average RSSI from the Beacon frames of the current AP */
3389         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3390                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3391                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3392                 ifmgd->last_cqm_event_signal = 0;
3393                 ifmgd->count_beacon_signal = 1;
3394                 ifmgd->last_ave_beacon_signal = 0;
3395         } else {
3396                 ifmgd->count_beacon_signal++;
3397         }
3398
3399         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3400
3401         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3402             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3403                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3404                 int last_sig = ifmgd->last_ave_beacon_signal;
3405                 struct ieee80211_event event = {
3406                         .type = RSSI_EVENT,
3407                 };
3408
3409                 /*
3410                  * if signal crosses either of the boundaries, invoke callback
3411                  * with appropriate parameters
3412                  */
3413                 if (sig > ifmgd->rssi_max_thold &&
3414                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3415                         ifmgd->last_ave_beacon_signal = sig;
3416                         event.u.rssi.data = RSSI_EVENT_HIGH;
3417                         drv_event_callback(local, sdata, &event);
3418                 } else if (sig < ifmgd->rssi_min_thold &&
3419                            (last_sig >= ifmgd->rssi_max_thold ||
3420                            last_sig == 0)) {
3421                         ifmgd->last_ave_beacon_signal = sig;
3422                         event.u.rssi.data = RSSI_EVENT_LOW;
3423                         drv_event_callback(local, sdata, &event);
3424                 }
3425         }
3426
3427         if (bss_conf->cqm_rssi_thold &&
3428             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3429             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3430                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3431                 int last_event = ifmgd->last_cqm_event_signal;
3432                 int thold = bss_conf->cqm_rssi_thold;
3433                 int hyst = bss_conf->cqm_rssi_hyst;
3434
3435                 if (sig < thold &&
3436                     (last_event == 0 || sig < last_event - hyst)) {
3437                         ifmgd->last_cqm_event_signal = sig;
3438                         ieee80211_cqm_rssi_notify(
3439                                 &sdata->vif,
3440                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3441                                 sig, GFP_KERNEL);
3442                 } else if (sig > thold &&
3443                            (last_event == 0 || sig > last_event + hyst)) {
3444                         ifmgd->last_cqm_event_signal = sig;
3445                         ieee80211_cqm_rssi_notify(
3446                                 &sdata->vif,
3447                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3448                                 sig, GFP_KERNEL);
3449                 }
3450         }
3451
3452         if (bss_conf->cqm_rssi_low &&
3453             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3454                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3455                 int last_event = ifmgd->last_cqm_event_signal;
3456                 int low = bss_conf->cqm_rssi_low;
3457                 int high = bss_conf->cqm_rssi_high;
3458
3459                 if (sig < low &&
3460                     (last_event == 0 || last_event >= low)) {
3461                         ifmgd->last_cqm_event_signal = sig;
3462                         ieee80211_cqm_rssi_notify(
3463                                 &sdata->vif,
3464                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3465                                 sig, GFP_KERNEL);
3466                 } else if (sig > high &&
3467                            (last_event == 0 || last_event <= high)) {
3468                         ifmgd->last_cqm_event_signal = sig;
3469                         ieee80211_cqm_rssi_notify(
3470                                 &sdata->vif,
3471                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3472                                 sig, GFP_KERNEL);
3473                 }
3474         }
3475
3476         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3477                 mlme_dbg_ratelimited(sdata,
3478                                      "cancelling AP probe due to a received beacon\n");
3479                 ieee80211_reset_ap_probe(sdata);
3480         }
3481
3482         /*
3483          * Push the beacon loss detection into the future since
3484          * we are processing a beacon from the AP just now.
3485          */
3486         ieee80211_sta_reset_beacon_monitor(sdata);
3487
3488         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3489         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3490                                           len - baselen, false, &elems,
3491                                           care_about_ies, ncrc);
3492
3493         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3494             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3495                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3496                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3497                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3498                                 ieee80211_hw_config(local,
3499                                                     IEEE80211_CONF_CHANGE_PS);
3500                         }
3501                         ieee80211_send_nullfunc(local, sdata, false);
3502                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3503                         local->pspolling = true;
3504
3505                         /*
3506                          * Here is assumed that the driver will be
3507                          * able to send ps-poll frame and receive a
3508                          * response even though power save mode is
3509                          * enabled, but some drivers might require
3510                          * to disable power save here. This needs
3511                          * to be investigated.
3512                          */
3513                         ieee80211_send_pspoll(local, sdata);
3514                 }
3515         }
3516
3517         if (sdata->vif.p2p ||
3518             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3519                 struct ieee80211_p2p_noa_attr noa = {};
3520                 int ret;
3521
3522                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3523                                             len - baselen,
3524                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3525                                             (u8 *) &noa, sizeof(noa));
3526                 if (ret >= 2) {
3527                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3528                                 /* valid noa_attr and index changed */
3529                                 sdata->u.mgd.p2p_noa_index = noa.index;
3530                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3531                                 changed |= BSS_CHANGED_P2P_PS;
3532                                 /*
3533                                  * make sure we update all information, the CRC
3534                                  * mechanism doesn't look at P2P attributes.
3535                                  */
3536                                 ifmgd->beacon_crc_valid = false;
3537                         }
3538                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3539                         /* noa_attr not found and we had valid noa_attr before */
3540                         sdata->u.mgd.p2p_noa_index = -1;
3541                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3542                         changed |= BSS_CHANGED_P2P_PS;
3543                         ifmgd->beacon_crc_valid = false;
3544                 }
3545         }
3546
3547         if (ifmgd->csa_waiting_bcn)
3548                 ieee80211_chswitch_post_beacon(sdata);
3549
3550         /*
3551          * Update beacon timing and dtim count on every beacon appearance. This
3552          * will allow the driver to use the most updated values. Do it before
3553          * comparing this one with last received beacon.
3554          * IMPORTANT: These parameters would possibly be out of sync by the time
3555          * the driver will use them. The synchronized view is currently
3556          * guaranteed only in certain callbacks.
3557          */
3558         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3559                 sdata->vif.bss_conf.sync_tsf =
3560                         le64_to_cpu(mgmt->u.beacon.timestamp);
3561                 sdata->vif.bss_conf.sync_device_ts =
3562                         rx_status->device_timestamp;
3563                 if (elems.tim)
3564                         sdata->vif.bss_conf.sync_dtim_count =
3565                                 elems.tim->dtim_count;
3566                 else
3567                         sdata->vif.bss_conf.sync_dtim_count = 0;
3568         }
3569
3570         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3571                 return;
3572         ifmgd->beacon_crc = ncrc;
3573         ifmgd->beacon_crc_valid = true;
3574
3575         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3576
3577         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3578                                          rx_status->device_timestamp,
3579                                          &elems, true);
3580
3581         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3582             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3583                                      elems.wmm_param_len))
3584                 changed |= BSS_CHANGED_QOS;
3585
3586         /*
3587          * If we haven't had a beacon before, tell the driver about the
3588          * DTIM period (and beacon timing if desired) now.
3589          */
3590         if (!ifmgd->have_beacon) {
3591                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3592                 if (elems.tim)
3593                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3594                 else
3595                         bss_conf->dtim_period = 1;
3596
3597                 changed |= BSS_CHANGED_BEACON_INFO;
3598                 ifmgd->have_beacon = true;
3599
3600                 mutex_lock(&local->iflist_mtx);
3601                 ieee80211_recalc_ps(local);
3602                 mutex_unlock(&local->iflist_mtx);
3603
3604                 ieee80211_recalc_ps_vif(sdata);
3605         }
3606
3607         if (elems.erp_info) {
3608                 erp_valid = true;
3609                 erp_value = elems.erp_info[0];
3610         } else {
3611                 erp_valid = false;
3612         }
3613         changed |= ieee80211_handle_bss_capability(sdata,
3614                         le16_to_cpu(mgmt->u.beacon.capab_info),
3615                         erp_valid, erp_value);
3616
3617         mutex_lock(&local->sta_mtx);
3618         sta = sta_info_get(sdata, bssid);
3619
3620         if (ieee80211_config_bw(sdata, sta,
3621                                 elems.ht_cap_elem, elems.ht_operation,
3622                                 elems.vht_operation, bssid, &changed)) {
3623                 mutex_unlock(&local->sta_mtx);
3624                 sdata_info(sdata,
3625                            "failed to follow AP %pM bandwidth change, disconnect\n",
3626                            bssid);
3627                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3628                                        WLAN_REASON_DEAUTH_LEAVING,
3629                                        true, deauth_buf);
3630                 ieee80211_report_disconnect(sdata, deauth_buf,
3631                                             sizeof(deauth_buf), true,
3632                                             WLAN_REASON_DEAUTH_LEAVING);
3633                 return;
3634         }
3635
3636         if (sta && elems.opmode_notif)
3637                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3638                                             rx_status->band);
3639         mutex_unlock(&local->sta_mtx);
3640
3641         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3642                                                elems.country_elem,
3643                                                elems.country_elem_len,
3644                                                elems.pwr_constr_elem,
3645                                                elems.cisco_dtpc_elem);
3646
3647         ieee80211_bss_info_change_notify(sdata, changed);
3648 }
3649
3650 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3651                                   struct sk_buff *skb)
3652 {
3653         struct ieee80211_rx_status *rx_status;
3654         struct ieee80211_mgmt *mgmt;
3655         u16 fc;
3656         struct ieee802_11_elems elems;
3657         int ies_len;
3658
3659         rx_status = (struct ieee80211_rx_status *) skb->cb;
3660         mgmt = (struct ieee80211_mgmt *) skb->data;
3661         fc = le16_to_cpu(mgmt->frame_control);
3662
3663         sdata_lock(sdata);
3664
3665         switch (fc & IEEE80211_FCTL_STYPE) {
3666         case IEEE80211_STYPE_BEACON:
3667                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3668                 break;
3669         case IEEE80211_STYPE_PROBE_RESP:
3670                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3671                 break;
3672         case IEEE80211_STYPE_AUTH:
3673                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3674                 break;
3675         case IEEE80211_STYPE_DEAUTH:
3676                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3677                 break;
3678         case IEEE80211_STYPE_DISASSOC:
3679                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3680                 break;
3681         case IEEE80211_STYPE_ASSOC_RESP:
3682         case IEEE80211_STYPE_REASSOC_RESP:
3683                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3684                 break;
3685         case IEEE80211_STYPE_ACTION:
3686                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3687                         ies_len = skb->len -
3688                                   offsetof(struct ieee80211_mgmt,
3689                                            u.action.u.chan_switch.variable);
3690
3691                         if (ies_len < 0)
3692                                 break;
3693
3694                         ieee802_11_parse_elems(
3695                                 mgmt->u.action.u.chan_switch.variable,
3696                                 ies_len, true, &elems);
3697
3698                         if (elems.parse_error)
3699                                 break;
3700
3701                         ieee80211_sta_process_chanswitch(sdata,
3702                                                  rx_status->mactime,
3703                                                  rx_status->device_timestamp,
3704                                                  &elems, false);
3705                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3706                         ies_len = skb->len -
3707                                   offsetof(struct ieee80211_mgmt,
3708                                            u.action.u.ext_chan_switch.variable);
3709
3710                         if (ies_len < 0)
3711                                 break;
3712
3713                         ieee802_11_parse_elems(
3714                                 mgmt->u.action.u.ext_chan_switch.variable,
3715                                 ies_len, true, &elems);
3716
3717                         if (elems.parse_error)
3718                                 break;
3719
3720                         /* for the handling code pretend this was also an IE */
3721                         elems.ext_chansw_ie =
3722                                 &mgmt->u.action.u.ext_chan_switch.data;
3723
3724                         ieee80211_sta_process_chanswitch(sdata,
3725                                                  rx_status->mactime,
3726                                                  rx_status->device_timestamp,
3727                                                  &elems, false);
3728                 }
3729                 break;
3730         }
3731         sdata_unlock(sdata);
3732 }
3733
3734 static void ieee80211_sta_timer(unsigned long data)
3735 {
3736         struct ieee80211_sub_if_data *sdata =
3737                 (struct ieee80211_sub_if_data *) data;
3738
3739         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3740 }
3741
3742 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3743                                           u8 *bssid, u8 reason, bool tx)
3744 {
3745         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3746
3747         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3748                                tx, frame_buf);
3749
3750         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3751                                     reason);
3752 }
3753
3754 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3755 {
3756         struct ieee80211_local *local = sdata->local;
3757         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3758         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3759         u32 tx_flags = 0;
3760         u16 trans = 1;
3761         u16 status = 0;
3762
3763         sdata_assert_lock(sdata);
3764
3765         if (WARN_ON_ONCE(!auth_data))
3766                 return -EINVAL;
3767
3768         auth_data->tries++;
3769
3770         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3771                 sdata_info(sdata, "authentication with %pM timed out\n",
3772                            auth_data->bss->bssid);
3773
3774                 /*
3775                  * Most likely AP is not in the range so remove the
3776                  * bss struct for that AP.
3777                  */
3778                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3779
3780                 return -ETIMEDOUT;
3781         }
3782
3783         drv_mgd_prepare_tx(local, sdata);
3784
3785         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3786                    auth_data->bss->bssid, auth_data->tries,
3787                    IEEE80211_AUTH_MAX_TRIES);
3788
3789         auth_data->expected_transaction = 2;
3790
3791         if (auth_data->algorithm == WLAN_AUTH_SAE) {
3792                 trans = auth_data->sae_trans;
3793                 status = auth_data->sae_status;
3794                 auth_data->expected_transaction = trans;
3795         }
3796
3797         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3798                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3799                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3800
3801         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3802                             auth_data->data, auth_data->data_len,
3803                             auth_data->bss->bssid,
3804                             auth_data->bss->bssid, NULL, 0, 0,
3805                             tx_flags);
3806
3807         if (tx_flags == 0) {
3808                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3809                 auth_data->timeout_started = true;
3810                 run_again(sdata, auth_data->timeout);
3811         } else {
3812                 auth_data->timeout =
3813                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3814                 auth_data->timeout_started = true;
3815                 run_again(sdata, auth_data->timeout);
3816         }
3817
3818         return 0;
3819 }
3820
3821 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3822 {
3823         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3824         struct ieee80211_local *local = sdata->local;
3825
3826         sdata_assert_lock(sdata);
3827
3828         assoc_data->tries++;
3829         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3830                 sdata_info(sdata, "association with %pM timed out\n",
3831                            assoc_data->bss->bssid);
3832
3833                 /*
3834                  * Most likely AP is not in the range so remove the
3835                  * bss struct for that AP.
3836                  */
3837                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3838
3839                 return -ETIMEDOUT;
3840         }
3841
3842         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3843                    assoc_data->bss->bssid, assoc_data->tries,
3844                    IEEE80211_ASSOC_MAX_TRIES);
3845         ieee80211_send_assoc(sdata);
3846
3847         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3848                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3849                 assoc_data->timeout_started = true;
3850                 run_again(sdata, assoc_data->timeout);
3851         } else {
3852                 assoc_data->timeout =
3853                         round_jiffies_up(jiffies +
3854                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3855                 assoc_data->timeout_started = true;
3856                 run_again(sdata, assoc_data->timeout);
3857         }
3858
3859         return 0;
3860 }
3861
3862 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3863                                   __le16 fc, bool acked)
3864 {
3865         struct ieee80211_local *local = sdata->local;
3866
3867         sdata->u.mgd.status_fc = fc;
3868         sdata->u.mgd.status_acked = acked;
3869         sdata->u.mgd.status_received = true;
3870
3871         ieee80211_queue_work(&local->hw, &sdata->work);
3872 }
3873
3874 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3875 {
3876         struct ieee80211_local *local = sdata->local;
3877         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3878
3879         sdata_lock(sdata);
3880
3881         if (ifmgd->status_received) {
3882                 __le16 fc = ifmgd->status_fc;
3883                 bool status_acked = ifmgd->status_acked;
3884
3885                 ifmgd->status_received = false;
3886                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3887                         if (status_acked) {
3888                                 ifmgd->auth_data->timeout =
3889                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3890                                 run_again(sdata, ifmgd->auth_data->timeout);
3891                         } else {
3892                                 ifmgd->auth_data->timeout = jiffies - 1;
3893                         }
3894                         ifmgd->auth_data->timeout_started = true;
3895                 } else if (ifmgd->assoc_data &&
3896                            (ieee80211_is_assoc_req(fc) ||
3897                             ieee80211_is_reassoc_req(fc))) {
3898                         if (status_acked) {
3899                                 ifmgd->assoc_data->timeout =
3900                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3901                                 run_again(sdata, ifmgd->assoc_data->timeout);
3902                         } else {
3903                                 ifmgd->assoc_data->timeout = jiffies - 1;
3904                         }
3905                         ifmgd->assoc_data->timeout_started = true;
3906                 }
3907         }
3908
3909         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3910             time_after(jiffies, ifmgd->auth_data->timeout)) {
3911                 if (ifmgd->auth_data->done) {
3912                         /*
3913                          * ok ... we waited for assoc but userspace didn't,
3914                          * so let's just kill the auth data
3915                          */
3916                         ieee80211_destroy_auth_data(sdata, false);
3917                 } else if (ieee80211_auth(sdata)) {
3918                         u8 bssid[ETH_ALEN];
3919                         struct ieee80211_event event = {
3920                                 .type = MLME_EVENT,
3921                                 .u.mlme.data = AUTH_EVENT,
3922                                 .u.mlme.status = MLME_TIMEOUT,
3923                         };
3924
3925                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3926
3927                         ieee80211_destroy_auth_data(sdata, false);
3928
3929                         cfg80211_auth_timeout(sdata->dev, bssid);
3930                         drv_event_callback(sdata->local, sdata, &event);
3931                 }
3932         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3933                 run_again(sdata, ifmgd->auth_data->timeout);
3934
3935         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3936             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3937                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3938                     ieee80211_do_assoc(sdata)) {
3939                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3940                         struct ieee80211_event event = {
3941                                 .type = MLME_EVENT,
3942                                 .u.mlme.data = ASSOC_EVENT,
3943                                 .u.mlme.status = MLME_TIMEOUT,
3944                         };
3945
3946                         ieee80211_destroy_assoc_data(sdata, false, false);
3947                         cfg80211_assoc_timeout(sdata->dev, bss);
3948                         drv_event_callback(sdata->local, sdata, &event);
3949                 }
3950         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3951                 run_again(sdata, ifmgd->assoc_data->timeout);
3952
3953         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3954             ifmgd->associated) {
3955                 u8 bssid[ETH_ALEN];
3956                 int max_tries;
3957
3958                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3959
3960                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3961                         max_tries = max_nullfunc_tries;
3962                 else
3963                         max_tries = max_probe_tries;
3964
3965                 /* ACK received for nullfunc probing frame */
3966                 if (!ifmgd->probe_send_count)
3967                         ieee80211_reset_ap_probe(sdata);
3968                 else if (ifmgd->nullfunc_failed) {
3969                         if (ifmgd->probe_send_count < max_tries) {
3970                                 mlme_dbg(sdata,
3971                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3972                                          bssid, ifmgd->probe_send_count,
3973                                          max_tries);
3974                                 ieee80211_mgd_probe_ap_send(sdata);
3975                         } else {
3976                                 mlme_dbg(sdata,
3977                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3978                                          bssid);
3979                                 ieee80211_sta_connection_lost(sdata, bssid,
3980                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3981                                         false);
3982                         }
3983                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3984                         run_again(sdata, ifmgd->probe_timeout);
3985                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3986                         mlme_dbg(sdata,
3987                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3988                                  bssid, probe_wait_ms);
3989                         ieee80211_sta_connection_lost(sdata, bssid,
3990                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3991                 } else if (ifmgd->probe_send_count < max_tries) {
3992                         mlme_dbg(sdata,
3993                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3994                                  bssid, probe_wait_ms,
3995                                  ifmgd->probe_send_count, max_tries);
3996                         ieee80211_mgd_probe_ap_send(sdata);
3997                 } else {
3998                         /*
3999                          * We actually lost the connection ... or did we?
4000                          * Let's make sure!
4001                          */
4002                         mlme_dbg(sdata,
4003                                  "No probe response from AP %pM after %dms, disconnecting.\n",
4004                                  bssid, probe_wait_ms);
4005
4006                         ieee80211_sta_connection_lost(sdata, bssid,
4007                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4008                 }
4009         }
4010
4011         sdata_unlock(sdata);
4012 }
4013
4014 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
4015 {
4016         struct ieee80211_sub_if_data *sdata =
4017                 (struct ieee80211_sub_if_data *) data;
4018         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4019
4020         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4021                 return;
4022
4023         sdata->u.mgd.connection_loss = false;
4024         ieee80211_queue_work(&sdata->local->hw,
4025                              &sdata->u.mgd.beacon_connection_loss_work);
4026 }
4027
4028 static void ieee80211_sta_conn_mon_timer(unsigned long data)
4029 {
4030         struct ieee80211_sub_if_data *sdata =
4031                 (struct ieee80211_sub_if_data *) data;
4032         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4033         struct ieee80211_local *local = sdata->local;
4034
4035         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4036                 return;
4037
4038         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4039 }
4040
4041 static void ieee80211_sta_monitor_work(struct work_struct *work)
4042 {
4043         struct ieee80211_sub_if_data *sdata =
4044                 container_of(work, struct ieee80211_sub_if_data,
4045                              u.mgd.monitor_work);
4046
4047         ieee80211_mgd_probe_ap(sdata, false);
4048 }
4049
4050 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4051 {
4052         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4053                 __ieee80211_stop_poll(sdata);
4054
4055                 /* let's probe the connection once */
4056                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4057                         ieee80211_queue_work(&sdata->local->hw,
4058                                              &sdata->u.mgd.monitor_work);
4059         }
4060 }
4061
4062 #ifdef CONFIG_PM
4063 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4064 {
4065         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4066         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4067
4068         sdata_lock(sdata);
4069
4070         if (ifmgd->auth_data || ifmgd->assoc_data) {
4071                 const u8 *bssid = ifmgd->auth_data ?
4072                                 ifmgd->auth_data->bss->bssid :
4073                                 ifmgd->assoc_data->bss->bssid;
4074
4075                 /*
4076                  * If we are trying to authenticate / associate while suspending,
4077                  * cfg80211 won't know and won't actually abort those attempts,
4078                  * thus we need to do that ourselves.
4079                  */
4080                 ieee80211_send_deauth_disassoc(sdata, bssid,
4081                                                IEEE80211_STYPE_DEAUTH,
4082                                                WLAN_REASON_DEAUTH_LEAVING,
4083                                                false, frame_buf);
4084                 if (ifmgd->assoc_data)
4085                         ieee80211_destroy_assoc_data(sdata, false, true);
4086                 if (ifmgd->auth_data)
4087                         ieee80211_destroy_auth_data(sdata, false);
4088                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4089                                       IEEE80211_DEAUTH_FRAME_LEN);
4090         }
4091
4092         /* This is a bit of a hack - we should find a better and more generic
4093          * solution to this. Normally when suspending, cfg80211 will in fact
4094          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4095          * auth (not so important) or assoc (this is the problem) process.
4096          *
4097          * As a consequence, it can happen that we are in the process of both
4098          * associating and suspending, and receive an association response
4099          * after cfg80211 has checked if it needs to disconnect, but before
4100          * we actually set the flag to drop incoming frames. This will then
4101          * cause the workqueue flush to process the association response in
4102          * the suspend, resulting in a successful association just before it
4103          * tries to remove the interface from the driver, which now though
4104          * has a channel context assigned ... this results in issues.
4105          *
4106          * To work around this (for now) simply deauth here again if we're
4107          * now connected.
4108          */
4109         if (ifmgd->associated && !sdata->local->wowlan) {
4110                 u8 bssid[ETH_ALEN];
4111                 struct cfg80211_deauth_request req = {
4112                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4113                         .bssid = bssid,
4114                 };
4115
4116                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4117                 ieee80211_mgd_deauth(sdata, &req);
4118         }
4119
4120         sdata_unlock(sdata);
4121 }
4122
4123 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4124 {
4125         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4126
4127         sdata_lock(sdata);
4128         if (!ifmgd->associated) {
4129                 sdata_unlock(sdata);
4130                 return;
4131         }
4132
4133         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4134                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4135                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4136                 ieee80211_sta_connection_lost(sdata,
4137                                               ifmgd->associated->bssid,
4138                                               WLAN_REASON_UNSPECIFIED,
4139                                               true);
4140                 sdata_unlock(sdata);
4141                 return;
4142         }
4143         sdata_unlock(sdata);
4144 }
4145 #endif
4146
4147 /* interface setup */
4148 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4149 {
4150         struct ieee80211_if_managed *ifmgd;
4151
4152         ifmgd = &sdata->u.mgd;
4153         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4154         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4155         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4156                   ieee80211_beacon_connection_loss_work);
4157         INIT_WORK(&ifmgd->csa_connection_drop_work,
4158                   ieee80211_csa_connection_drop_work);
4159         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4160         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4161                           ieee80211_tdls_peer_del_work);
4162         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4163                     (unsigned long) sdata);
4164         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4165                     (unsigned long) sdata);
4166         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4167                     (unsigned long) sdata);
4168         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4169                     (unsigned long) sdata);
4170         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4171                           ieee80211_sta_handle_tspec_ac_params_wk);
4172
4173         ifmgd->flags = 0;
4174         ifmgd->powersave = sdata->wdev.ps;
4175         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4176         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4177         ifmgd->p2p_noa_index = -1;
4178
4179         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4180                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4181         else
4182                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4183
4184         /* Setup TDLS data */
4185         spin_lock_init(&ifmgd->teardown_lock);
4186         ifmgd->teardown_skb = NULL;
4187         ifmgd->orig_teardown_skb = NULL;
4188 }
4189
4190 /* scan finished notification */
4191 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4192 {
4193         struct ieee80211_sub_if_data *sdata;
4194
4195         /* Restart STA timers */
4196         rcu_read_lock();
4197         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4198                 if (ieee80211_sdata_running(sdata))
4199                         ieee80211_restart_sta_timer(sdata);
4200         }
4201         rcu_read_unlock();
4202 }
4203
4204 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4205                                      struct cfg80211_bss *cbss)
4206 {
4207         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4208         const u8 *ht_cap_ie, *vht_cap_ie;
4209         const struct ieee80211_ht_cap *ht_cap;
4210         const struct ieee80211_vht_cap *vht_cap;
4211         u8 chains = 1;
4212
4213         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4214                 return chains;
4215
4216         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4217         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4218                 ht_cap = (void *)(ht_cap_ie + 2);
4219                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4220                 /*
4221                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4222                  *       "Tx Unequal Modulation Supported" fields.
4223                  */
4224         }
4225
4226         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4227                 return chains;
4228
4229         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4230         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4231                 u8 nss;
4232                 u16 tx_mcs_map;
4233
4234                 vht_cap = (void *)(vht_cap_ie + 2);
4235                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4236                 for (nss = 8; nss > 0; nss--) {
4237                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4238                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4239                                 break;
4240                 }
4241                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4242                 chains = max(chains, nss);
4243         }
4244
4245         return chains;
4246 }
4247
4248 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4249                                   struct cfg80211_bss *cbss)
4250 {
4251         struct ieee80211_local *local = sdata->local;
4252         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4253         const struct ieee80211_ht_cap *ht_cap = NULL;
4254         const struct ieee80211_ht_operation *ht_oper = NULL;
4255         const struct ieee80211_vht_operation *vht_oper = NULL;
4256         struct ieee80211_supported_band *sband;
4257         struct cfg80211_chan_def chandef;
4258         int ret;
4259         u32 i;
4260         bool have_80mhz;
4261
4262         sband = local->hw.wiphy->bands[cbss->channel->band];
4263
4264         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4265                           IEEE80211_STA_DISABLE_80P80MHZ |
4266                           IEEE80211_STA_DISABLE_160MHZ);
4267
4268         rcu_read_lock();
4269
4270         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4271             sband->ht_cap.ht_supported) {
4272                 const u8 *ht_oper_ie, *ht_cap_ie;
4273
4274                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4275                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4276                         ht_oper = (void *)(ht_oper_ie + 2);
4277
4278                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4279                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4280                         ht_cap = (void *)(ht_cap_ie + 2);
4281
4282                 if (!ht_cap) {
4283                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4284                         ht_oper = NULL;
4285                 }
4286         }
4287
4288         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4289             sband->vht_cap.vht_supported) {
4290                 const u8 *vht_oper_ie, *vht_cap;
4291
4292                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4293                                                    WLAN_EID_VHT_OPERATION);
4294                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4295                         vht_oper = (void *)(vht_oper_ie + 2);
4296                 if (vht_oper && !ht_oper) {
4297                         vht_oper = NULL;
4298                         sdata_info(sdata,
4299                                    "AP advertised VHT without HT, disabling both\n");
4300                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4301                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4302                 }
4303
4304                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4305                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4306                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4307                         vht_oper = NULL;
4308                 }
4309         }
4310
4311         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4312         have_80mhz = false;
4313         for (i = 0; i < sband->n_channels; i++) {
4314                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4315                                                 IEEE80211_CHAN_NO_80MHZ))
4316                         continue;
4317
4318                 have_80mhz = true;
4319                 break;
4320         }
4321
4322         if (!have_80mhz)
4323                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4324
4325         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4326                                                      cbss->channel,
4327                                                      ht_cap, ht_oper, vht_oper,
4328                                                      &chandef, false);
4329
4330         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4331                                       local->rx_chains);
4332
4333         rcu_read_unlock();
4334
4335         /* will change later if needed */
4336         sdata->smps_mode = IEEE80211_SMPS_OFF;
4337
4338         mutex_lock(&local->mtx);
4339         /*
4340          * If this fails (possibly due to channel context sharing
4341          * on incompatible channels, e.g. 80+80 and 160 sharing the
4342          * same control channel) try to use a smaller bandwidth.
4343          */
4344         ret = ieee80211_vif_use_channel(sdata, &chandef,
4345                                         IEEE80211_CHANCTX_SHARED);
4346
4347         /* don't downgrade for 5 and 10 MHz channels, though. */
4348         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4349             chandef.width == NL80211_CHAN_WIDTH_10)
4350                 goto out;
4351
4352         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4353                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4354                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4355                                                 IEEE80211_CHANCTX_SHARED);
4356         }
4357  out:
4358         mutex_unlock(&local->mtx);
4359         return ret;
4360 }
4361
4362 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4363                                      struct cfg80211_bss *cbss, bool assoc,
4364                                      bool override)
4365 {
4366         struct ieee80211_local *local = sdata->local;
4367         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4368         struct ieee80211_bss *bss = (void *)cbss->priv;
4369         struct sta_info *new_sta = NULL;
4370         struct ieee80211_supported_band *sband;
4371         bool have_sta = false;
4372         int err;
4373
4374         sband = local->hw.wiphy->bands[cbss->channel->band];
4375
4376         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4377                 return -EINVAL;
4378
4379         /* If a reconfig is happening, bail out */
4380         if (local->in_reconfig)
4381                 return -EBUSY;
4382
4383         if (assoc) {
4384                 rcu_read_lock();
4385                 have_sta = sta_info_get(sdata, cbss->bssid);
4386                 rcu_read_unlock();
4387         }
4388
4389         if (!have_sta) {
4390                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4391                 if (!new_sta)
4392                         return -ENOMEM;
4393         }
4394
4395         /*
4396          * Set up the information for the new channel before setting the
4397          * new channel. We can't - completely race-free - change the basic
4398          * rates bitmap and the channel (sband) that it refers to, but if
4399          * we set it up before we at least avoid calling into the driver's
4400          * bss_info_changed() method with invalid information (since we do
4401          * call that from changing the channel - only for IDLE and perhaps
4402          * some others, but ...).
4403          *
4404          * So to avoid that, just set up all the new information before the
4405          * channel, but tell the driver to apply it only afterwards, since
4406          * it might need the new channel for that.
4407          */
4408         if (new_sta) {
4409                 u32 rates = 0, basic_rates = 0;
4410                 bool have_higher_than_11mbit;
4411                 int min_rate = INT_MAX, min_rate_index = -1;
4412                 const struct cfg80211_bss_ies *ies;
4413                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4414
4415                 ieee80211_get_rates(sband, bss->supp_rates,
4416                                     bss->supp_rates_len,
4417                                     &rates, &basic_rates,
4418                                     &have_higher_than_11mbit,
4419                                     &min_rate, &min_rate_index,
4420                                     shift);
4421
4422                 /*
4423                  * This used to be a workaround for basic rates missing
4424                  * in the association response frame. Now that we no
4425                  * longer use the basic rates from there, it probably
4426                  * doesn't happen any more, but keep the workaround so
4427                  * in case some *other* APs are buggy in different ways
4428                  * we can connect -- with a warning.
4429                  */
4430                 if (!basic_rates && min_rate_index >= 0) {
4431                         sdata_info(sdata,
4432                                    "No basic rates, using min rate instead\n");
4433                         basic_rates = BIT(min_rate_index);
4434                 }
4435
4436                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4437                 sdata->vif.bss_conf.basic_rates = basic_rates;
4438
4439                 /* cf. IEEE 802.11 9.2.12 */
4440                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4441                     have_higher_than_11mbit)
4442                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4443                 else
4444                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4445
4446                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4447
4448                 /* set timing information */
4449                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4450                 rcu_read_lock();
4451                 ies = rcu_dereference(cbss->beacon_ies);
4452                 if (ies) {
4453                         const u8 *tim_ie;
4454
4455                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4456                         sdata->vif.bss_conf.sync_device_ts =
4457                                 bss->device_ts_beacon;
4458                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4459                                                   ies->data, ies->len);
4460                         if (tim_ie && tim_ie[1] >= 2)
4461                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4462                         else
4463                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4464                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4465                                                TIMING_BEACON_ONLY)) {
4466                         ies = rcu_dereference(cbss->proberesp_ies);
4467                         /* must be non-NULL since beacon IEs were NULL */
4468                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4469                         sdata->vif.bss_conf.sync_device_ts =
4470                                 bss->device_ts_presp;
4471                         sdata->vif.bss_conf.sync_dtim_count = 0;
4472                 } else {
4473                         sdata->vif.bss_conf.sync_tsf = 0;
4474                         sdata->vif.bss_conf.sync_device_ts = 0;
4475                         sdata->vif.bss_conf.sync_dtim_count = 0;
4476                 }
4477                 rcu_read_unlock();
4478         }
4479
4480         if (new_sta || override) {
4481                 err = ieee80211_prep_channel(sdata, cbss);
4482                 if (err) {
4483                         if (new_sta)
4484                                 sta_info_free(local, new_sta);
4485                         return -EINVAL;
4486                 }
4487         }
4488
4489         if (new_sta) {
4490                 /*
4491                  * tell driver about BSSID, basic rates and timing
4492                  * this was set up above, before setting the channel
4493                  */
4494                 ieee80211_bss_info_change_notify(sdata,
4495                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4496                         BSS_CHANGED_BEACON_INT);
4497
4498                 if (assoc)
4499                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4500
4501                 err = sta_info_insert(new_sta);
4502                 new_sta = NULL;
4503                 if (err) {
4504                         sdata_info(sdata,
4505                                    "failed to insert STA entry for the AP (error %d)\n",
4506                                    err);
4507                         return err;
4508                 }
4509         } else
4510                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4511
4512         /* Cancel scan to ensure that nothing interferes with connection */
4513         if (local->scanning)
4514                 ieee80211_scan_cancel(local);
4515
4516         return 0;
4517 }
4518
4519 /* config hooks */
4520 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4521                        struct cfg80211_auth_request *req)
4522 {
4523         struct ieee80211_local *local = sdata->local;
4524         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4525         struct ieee80211_mgd_auth_data *auth_data;
4526         u16 auth_alg;
4527         int err;
4528
4529         /* prepare auth data structure */
4530
4531         switch (req->auth_type) {
4532         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4533                 auth_alg = WLAN_AUTH_OPEN;
4534                 break;
4535         case NL80211_AUTHTYPE_SHARED_KEY:
4536                 if (IS_ERR(local->wep_tx_tfm))
4537                         return -EOPNOTSUPP;
4538                 auth_alg = WLAN_AUTH_SHARED_KEY;
4539                 break;
4540         case NL80211_AUTHTYPE_FT:
4541                 auth_alg = WLAN_AUTH_FT;
4542                 break;
4543         case NL80211_AUTHTYPE_NETWORK_EAP:
4544                 auth_alg = WLAN_AUTH_LEAP;
4545                 break;
4546         case NL80211_AUTHTYPE_SAE:
4547                 auth_alg = WLAN_AUTH_SAE;
4548                 break;
4549         case NL80211_AUTHTYPE_FILS_SK:
4550                 auth_alg = WLAN_AUTH_FILS_SK;
4551                 break;
4552         case NL80211_AUTHTYPE_FILS_SK_PFS:
4553                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4554                 break;
4555         case NL80211_AUTHTYPE_FILS_PK:
4556                 auth_alg = WLAN_AUTH_FILS_PK;
4557                 break;
4558         default:
4559                 return -EOPNOTSUPP;
4560         }
4561
4562         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4563                             req->ie_len, GFP_KERNEL);
4564         if (!auth_data)
4565                 return -ENOMEM;
4566
4567         auth_data->bss = req->bss;
4568
4569         if (req->auth_data_len >= 4) {
4570                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4571                         __le16 *pos = (__le16 *) req->auth_data;
4572
4573                         auth_data->sae_trans = le16_to_cpu(pos[0]);
4574                         auth_data->sae_status = le16_to_cpu(pos[1]);
4575                 }
4576                 memcpy(auth_data->data, req->auth_data + 4,
4577                        req->auth_data_len - 4);
4578                 auth_data->data_len += req->auth_data_len - 4;
4579         }
4580
4581         if (req->ie && req->ie_len) {
4582                 memcpy(&auth_data->data[auth_data->data_len],
4583                        req->ie, req->ie_len);
4584                 auth_data->data_len += req->ie_len;
4585         }
4586
4587         if (req->key && req->key_len) {
4588                 auth_data->key_len = req->key_len;
4589                 auth_data->key_idx = req->key_idx;
4590                 memcpy(auth_data->key, req->key, req->key_len);
4591         }
4592
4593         auth_data->algorithm = auth_alg;
4594
4595         /* try to authenticate/probe */
4596
4597         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4598             ifmgd->assoc_data) {
4599                 err = -EBUSY;
4600                 goto err_free;
4601         }
4602
4603         if (ifmgd->auth_data)
4604                 ieee80211_destroy_auth_data(sdata, false);
4605
4606         /* prep auth_data so we don't go into idle on disassoc */
4607         ifmgd->auth_data = auth_data;
4608
4609         if (ifmgd->associated) {
4610                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4611
4612                 sdata_info(sdata,
4613                            "disconnect from AP %pM for new auth to %pM\n",
4614                            ifmgd->associated->bssid, req->bss->bssid);
4615                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4616                                        WLAN_REASON_UNSPECIFIED,
4617                                        false, frame_buf);
4618
4619                 ieee80211_report_disconnect(sdata, frame_buf,
4620                                             sizeof(frame_buf), true,
4621                                             WLAN_REASON_UNSPECIFIED);
4622         }
4623
4624         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4625
4626         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4627         if (err)
4628                 goto err_clear;
4629
4630         err = ieee80211_auth(sdata);
4631         if (err) {
4632                 sta_info_destroy_addr(sdata, req->bss->bssid);
4633                 goto err_clear;
4634         }
4635
4636         /* hold our own reference */
4637         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4638         return 0;
4639
4640  err_clear:
4641         eth_zero_addr(ifmgd->bssid);
4642         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4643         ifmgd->auth_data = NULL;
4644         mutex_lock(&sdata->local->mtx);
4645         ieee80211_vif_release_channel(sdata);
4646         mutex_unlock(&sdata->local->mtx);
4647  err_free:
4648         kfree(auth_data);
4649         return err;
4650 }
4651
4652 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4653                         struct cfg80211_assoc_request *req)
4654 {
4655         struct ieee80211_local *local = sdata->local;
4656         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4657         struct ieee80211_bss *bss = (void *)req->bss->priv;
4658         struct ieee80211_mgd_assoc_data *assoc_data;
4659         const struct cfg80211_bss_ies *beacon_ies;
4660         struct ieee80211_supported_band *sband;
4661         const u8 *ssidie, *ht_ie, *vht_ie;
4662         int i, err;
4663         bool override = false;
4664
4665         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4666         if (!assoc_data)
4667                 return -ENOMEM;
4668
4669         rcu_read_lock();
4670         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4671         if (!ssidie) {
4672                 rcu_read_unlock();
4673                 kfree(assoc_data);
4674                 return -EINVAL;
4675         }
4676         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4677         assoc_data->ssid_len = ssidie[1];
4678         rcu_read_unlock();
4679
4680         if (ifmgd->associated) {
4681                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4682
4683                 sdata_info(sdata,
4684                            "disconnect from AP %pM for new assoc to %pM\n",
4685                            ifmgd->associated->bssid, req->bss->bssid);
4686                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4687                                        WLAN_REASON_UNSPECIFIED,
4688                                        false, frame_buf);
4689
4690                 ieee80211_report_disconnect(sdata, frame_buf,
4691                                             sizeof(frame_buf), true,
4692                                             WLAN_REASON_UNSPECIFIED);
4693         }
4694
4695         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4696                 err = -EBUSY;
4697                 goto err_free;
4698         }
4699
4700         if (ifmgd->assoc_data) {
4701                 err = -EBUSY;
4702                 goto err_free;
4703         }
4704
4705         if (ifmgd->auth_data) {
4706                 bool match;
4707
4708                 /* keep sta info, bssid if matching */
4709                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4710                 ieee80211_destroy_auth_data(sdata, match);
4711         }
4712
4713         /* prepare assoc data */
4714
4715         ifmgd->beacon_crc_valid = false;
4716
4717         assoc_data->wmm = bss->wmm_used &&
4718                           (local->hw.queues >= IEEE80211_NUM_ACS);
4719
4720         /*
4721          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4722          * We still associate in non-HT mode (11a/b/g) if any one of these
4723          * ciphers is configured as pairwise.
4724          * We can set this to true for non-11n hardware, that'll be checked
4725          * separately along with the peer capabilities.
4726          */
4727         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4728                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4729                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4730                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4731                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4732                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4733                         netdev_info(sdata->dev,
4734                                     "disabling HT/VHT due to WEP/TKIP use\n");
4735                 }
4736         }
4737
4738         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4739         sband = local->hw.wiphy->bands[req->bss->channel->band];
4740         if (!sband->ht_cap.ht_supported ||
4741             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4742             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4743                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4744                 if (!bss->wmm_used &&
4745                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4746                         netdev_info(sdata->dev,
4747                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4748         }
4749
4750         /* disable VHT if we don't support it or the AP doesn't use WMM */
4751         if (!sband->vht_cap.vht_supported ||
4752             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4753             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4754                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4755                 if (!bss->wmm_used &&
4756                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4757                         netdev_info(sdata->dev,
4758                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4759         }
4760
4761         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4762         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4763                sizeof(ifmgd->ht_capa_mask));
4764
4765         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4766         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4767                sizeof(ifmgd->vht_capa_mask));
4768
4769         if (req->ie && req->ie_len) {
4770                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4771                 assoc_data->ie_len = req->ie_len;
4772         }
4773
4774         if (req->fils_kek) {
4775                 /* should already be checked in cfg80211 - so warn */
4776                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4777                         err = -EINVAL;
4778                         goto err_free;
4779                 }
4780                 memcpy(assoc_data->fils_kek, req->fils_kek,
4781                        req->fils_kek_len);
4782                 assoc_data->fils_kek_len = req->fils_kek_len;
4783         }
4784
4785         if (req->fils_nonces)
4786                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4787                        2 * FILS_NONCE_LEN);
4788
4789         assoc_data->bss = req->bss;
4790
4791         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4792                 if (ifmgd->powersave)
4793                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4794                 else
4795                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4796         } else
4797                 sdata->smps_mode = ifmgd->req_smps;
4798
4799         assoc_data->capability = req->bss->capability;
4800         assoc_data->supp_rates = bss->supp_rates;
4801         assoc_data->supp_rates_len = bss->supp_rates_len;
4802
4803         rcu_read_lock();
4804         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4805         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4806                 assoc_data->ap_ht_param =
4807                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4808         else
4809                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4810         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4811         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4812                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4813                        sizeof(struct ieee80211_vht_cap));
4814         else
4815                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4816         rcu_read_unlock();
4817
4818         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4819                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4820              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4821                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4822
4823         if (bss->wmm_used && bss->uapsd_supported &&
4824             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4825                 assoc_data->uapsd = true;
4826                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4827         } else {
4828                 assoc_data->uapsd = false;
4829                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4830         }
4831
4832         if (req->prev_bssid)
4833                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4834
4835         if (req->use_mfp) {
4836                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4837                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4838         } else {
4839                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4840                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4841         }
4842
4843         if (req->flags & ASSOC_REQ_USE_RRM)
4844                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4845         else
4846                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4847
4848         if (req->crypto.control_port)
4849                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4850         else
4851                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4852
4853         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4854         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4855         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4856                                                         sdata->vif.type);
4857
4858         /* kick off associate process */
4859
4860         ifmgd->assoc_data = assoc_data;
4861         ifmgd->dtim_period = 0;
4862         ifmgd->have_beacon = false;
4863
4864         /* override HT/VHT configuration only if the AP and we support it */
4865         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4866                 struct ieee80211_sta_ht_cap sta_ht_cap;
4867
4868                 if (req->flags & ASSOC_REQ_DISABLE_HT)
4869                         override = true;
4870
4871                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4872                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4873
4874                 /* check for 40 MHz disable override */
4875                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4876                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4877                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4878                         override = true;
4879
4880                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4881                     req->flags & ASSOC_REQ_DISABLE_VHT)
4882                         override = true;
4883         }
4884
4885         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4886                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4887                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4888         }
4889
4890         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4891                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4892
4893         err = ieee80211_prep_connection(sdata, req->bss, true, override);
4894         if (err)
4895                 goto err_clear;
4896
4897         rcu_read_lock();
4898         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4899
4900         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4901             !beacon_ies) {
4902                 /*
4903                  * Wait up to one beacon interval ...
4904                  * should this be more if we miss one?
4905                  */
4906                 sdata_info(sdata, "waiting for beacon from %pM\n",
4907                            ifmgd->bssid);
4908                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4909                 assoc_data->timeout_started = true;
4910                 assoc_data->need_beacon = true;
4911         } else if (beacon_ies) {
4912                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4913                                                     beacon_ies->data,
4914                                                     beacon_ies->len);
4915                 u8 dtim_count = 0;
4916
4917                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4918                         const struct ieee80211_tim_ie *tim;
4919                         tim = (void *)(tim_ie + 2);
4920                         ifmgd->dtim_period = tim->dtim_period;
4921                         dtim_count = tim->dtim_count;
4922                 }
4923                 ifmgd->have_beacon = true;
4924                 assoc_data->timeout = jiffies;
4925                 assoc_data->timeout_started = true;
4926
4927                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4928                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4929                         sdata->vif.bss_conf.sync_device_ts =
4930                                 bss->device_ts_beacon;
4931                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4932                 }
4933         } else {
4934                 assoc_data->timeout = jiffies;
4935                 assoc_data->timeout_started = true;
4936         }
4937         rcu_read_unlock();
4938
4939         run_again(sdata, assoc_data->timeout);
4940
4941         if (bss->corrupt_data) {
4942                 char *corrupt_type = "data";
4943                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4944                         if (bss->corrupt_data &
4945                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4946                                 corrupt_type = "beacon and probe response";
4947                         else
4948                                 corrupt_type = "beacon";
4949                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4950                         corrupt_type = "probe response";
4951                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4952                            corrupt_type);
4953         }
4954
4955         return 0;
4956  err_clear:
4957         eth_zero_addr(ifmgd->bssid);
4958         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4959         ifmgd->assoc_data = NULL;
4960  err_free:
4961         kfree(assoc_data);
4962         return err;
4963 }
4964
4965 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4966                          struct cfg80211_deauth_request *req)
4967 {
4968         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4969         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4970         bool tx = !req->local_state_change;
4971
4972         if (ifmgd->auth_data &&
4973             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4974                 sdata_info(sdata,
4975                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4976                            req->bssid, req->reason_code,
4977                            ieee80211_get_reason_code_string(req->reason_code));
4978
4979                 drv_mgd_prepare_tx(sdata->local, sdata);
4980                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4981                                                IEEE80211_STYPE_DEAUTH,
4982                                                req->reason_code, tx,
4983                                                frame_buf);
4984                 ieee80211_destroy_auth_data(sdata, false);
4985                 ieee80211_report_disconnect(sdata, frame_buf,
4986                                             sizeof(frame_buf), true,
4987                                             req->reason_code);
4988
4989                 return 0;
4990         }
4991
4992         if (ifmgd->assoc_data &&
4993             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4994                 sdata_info(sdata,
4995                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
4996                            req->bssid, req->reason_code,
4997                            ieee80211_get_reason_code_string(req->reason_code));
4998
4999                 drv_mgd_prepare_tx(sdata->local, sdata);
5000                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5001                                                IEEE80211_STYPE_DEAUTH,
5002                                                req->reason_code, tx,
5003                                                frame_buf);
5004                 ieee80211_destroy_assoc_data(sdata, false, true);
5005                 ieee80211_report_disconnect(sdata, frame_buf,
5006                                             sizeof(frame_buf), true,
5007                                             req->reason_code);
5008                 return 0;
5009         }
5010
5011         if (ifmgd->associated &&
5012             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5013                 sdata_info(sdata,
5014                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5015                            req->bssid, req->reason_code,
5016                            ieee80211_get_reason_code_string(req->reason_code));
5017
5018                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5019                                        req->reason_code, tx, frame_buf);
5020                 ieee80211_report_disconnect(sdata, frame_buf,
5021                                             sizeof(frame_buf), true,
5022                                             req->reason_code);
5023                 return 0;
5024         }
5025
5026         return -ENOTCONN;
5027 }
5028
5029 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5030                            struct cfg80211_disassoc_request *req)
5031 {
5032         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5033         u8 bssid[ETH_ALEN];
5034         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5035
5036         /*
5037          * cfg80211 should catch this ... but it's racy since
5038          * we can receive a disassoc frame, process it, hand it
5039          * to cfg80211 while that's in a locked section already
5040          * trying to tell us that the user wants to disconnect.
5041          */
5042         if (ifmgd->associated != req->bss)
5043                 return -ENOLINK;
5044
5045         sdata_info(sdata,
5046                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5047                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5048
5049         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5050         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5051                                req->reason_code, !req->local_state_change,
5052                                frame_buf);
5053
5054         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5055                                     req->reason_code);
5056
5057         return 0;
5058 }
5059
5060 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5061 {
5062         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5063
5064         /*
5065          * Make sure some work items will not run after this,
5066          * they will not do anything but might not have been
5067          * cancelled when disconnecting.
5068          */
5069         cancel_work_sync(&ifmgd->monitor_work);
5070         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5071         cancel_work_sync(&ifmgd->request_smps_work);
5072         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5073         cancel_work_sync(&ifmgd->chswitch_work);
5074         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5075
5076         sdata_lock(sdata);
5077         if (ifmgd->assoc_data) {
5078                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5079                 ieee80211_destroy_assoc_data(sdata, false, false);
5080                 cfg80211_assoc_timeout(sdata->dev, bss);
5081         }
5082         if (ifmgd->auth_data)
5083                 ieee80211_destroy_auth_data(sdata, false);
5084         spin_lock_bh(&ifmgd->teardown_lock);
5085         if (ifmgd->teardown_skb) {
5086                 kfree_skb(ifmgd->teardown_skb);
5087                 ifmgd->teardown_skb = NULL;
5088                 ifmgd->orig_teardown_skb = NULL;
5089         }
5090         spin_unlock_bh(&ifmgd->teardown_lock);
5091         del_timer_sync(&ifmgd->timer);
5092         sdata_unlock(sdata);
5093 }
5094
5095 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5096                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5097                                s32 rssi_level,
5098                                gfp_t gfp)
5099 {
5100         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5101
5102         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5103
5104         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5105 }
5106 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5107
5108 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5109 {
5110         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5111
5112         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5113
5114         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5115 }
5116 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);