net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  * Copyright 2013-2014  Intel Mobile Communications GmbH
   9  * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/delay.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/if_arp.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/moduleparam.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/crc32.h>
  24 #include <linux/slab.h>
  25 #include <linux/export.h>
  26 #include <net/mac80211.h>
  27 #include <asm/unaligned.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "led.h"
  33 #include "fils_aead.h"
  34
  35 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  36 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  37 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  38 #define IEEE80211_AUTH_MAX_TRIES        3
  39 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  40 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  41 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  42 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  43 #define IEEE80211_ASSOC_MAX_TRIES       3
  44
  45 static int max_nullfunc_tries = 2;
  46 module_param(max_nullfunc_tries, int, 0644);
  47 MODULE_PARM_DESC(max_nullfunc_tries,
  48                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  49
  50 static int max_probe_tries = 5;
  51 module_param(max_probe_tries, int, 0644);
  52 MODULE_PARM_DESC(max_probe_tries,
  53                  "Maximum probe tries before disconnecting (reason 4).");
  54
  55 /*
  56  * Beacon loss timeout is calculated as N frames times the
  57  * advertised beacon interval.  This may need to be somewhat
  58  * higher than what hardware might detect to account for
  59  * delays in the host processing frames. But since we also
  60  * probe on beacon miss before declaring the connection lost
  61  * default to what we want.
  62  */
  63 static int beacon_loss_count = 7;
  64 module_param(beacon_loss_count, int, 0644);
  65 MODULE_PARM_DESC(beacon_loss_count,
  66                  "Number of beacon intervals before we decide beacon was lost.");
  67
  68 /*
  69  * Time the connection can be idle before we probe
  70  * it to see if we can still talk to the AP.
  71  */
  72 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  73 /*
  74  * Time we wait for a probe response after sending
  75  * a probe request because of beacon loss or for
  76  * checking the connection still works.
  77  */
  78 static int probe_wait_ms = 500;
  79 module_param(probe_wait_ms, int, 0644);
  80 MODULE_PARM_DESC(probe_wait_ms,
  81                  "Maximum time(ms) to wait for probe response"
  82                  " before disconnecting (reason 4).");
  83
  84 /*
  85  * How many Beacon frames need to have been used in average signal strength
  86  * before starting to indicate signal change events.
  87  */
  88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  89
  90 /*
  91  * We can have multiple work items (and connection probing)
  92  * scheduling this timer, but we need to take care to only
  93  * reschedule it when it should fire _earlier_ than it was
  94  * asked for before, or if it's not pending right now. This
  95  * function ensures that. Note that it then is required to
  96  * run this function for all timeouts after the first one
  97  * has happened -- the work that runs from this timer will
  98  * do that.
  99  */
 100 static void run_again(struct ieee80211_sub_if_data *sdata,
 101                       unsigned long timeout)
 102 {
 103         sdata_assert_lock(sdata);
 104
 105         if (!timer_pending(&sdata->u.mgd.timer) ||
 106             time_before(timeout, sdata->u.mgd.timer.expires))
 107                 mod_timer(&sdata->u.mgd.timer, timeout);
 108 }
 109
 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 111 {
 112         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 113                 return;
 114
 115         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 116                 return;
 117
 118         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 119                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 120 }
 121
 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 123 {
 124         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 125
 126         if (unlikely(!ifmgd->associated))
 127                 return;
 128
 129         if (ifmgd->probe_send_count)
 130                 ifmgd->probe_send_count = 0;
 131
 132         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 133                 return;
 134
 135         mod_timer(&ifmgd->conn_mon_timer,
 136                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 137 }
 138
 139 static int ecw2cw(int ecw)
 140 {
 141         return (1 << ecw) - 1;
 142 }
 143
 144 static u32
 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 146                              struct ieee80211_supported_band *sband,
 147                              struct ieee80211_channel *channel,
 148                              const struct ieee80211_ht_cap *ht_cap,
 149                              const struct ieee80211_ht_operation *ht_oper,
 150                              const struct ieee80211_vht_operation *vht_oper,
 151                              struct cfg80211_chan_def *chandef, bool tracking)
 152 {
 153         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 154         struct cfg80211_chan_def vht_chandef;
 155         struct ieee80211_sta_ht_cap sta_ht_cap;
 156         u32 ht_cfreq, ret;
 157
 158         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 159         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 160
 161         chandef->chan = channel;
 162         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 163         chandef->center_freq1 = channel->center_freq;
 164         chandef->center_freq2 = 0;
 165
 166         if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
 167                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 168                 goto out;
 169         }
 170
 171         chandef->width = NL80211_CHAN_WIDTH_20;
 172
 173         if (!(ht_cap->cap_info &
 174               cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
 175                 ret = IEEE80211_STA_DISABLE_40MHZ;
 176                 vht_chandef = *chandef;
 177                 goto out;
 178         }
 179
 180         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 181                                                   channel->band);
 182         /* check that channel matches the right operating channel */
 183         if (!tracking && channel->center_freq != ht_cfreq) {
 184                 /*
 185                  * It's possible that some APs are confused here;
 186                  * Netgear WNDR3700 sometimes reports 4 higher than
 187                  * the actual channel in association responses, but
 188                  * since we look at probe response/beacon data here
 189                  * it should be OK.
 190                  */
 191                 sdata_info(sdata,
 192                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 193                            channel->center_freq, ht_cfreq,
 194                            ht_oper->primary_chan, channel->band);
 195                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 196                 goto out;
 197         }
 198
 199         /* check 40 MHz support, if we have it */
 200         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 201                 ieee80211_chandef_ht_oper(ht_oper, chandef);
 202         } else {
 203                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 204                 ret = IEEE80211_STA_DISABLE_VHT;
 205                 /* also mark 40 MHz disabled */
 206                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 207                 goto out;
 208         }
 209
 210         if (!vht_oper || !sband->vht_cap.vht_supported) {
 211                 ret = IEEE80211_STA_DISABLE_VHT;
 212                 goto out;
 213         }
 214
 215         vht_chandef = *chandef;
 216         if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
 217                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 218                         sdata_info(sdata,
 219                                    "AP VHT information is invalid, disable VHT\n");
 220                 ret = IEEE80211_STA_DISABLE_VHT;
 221                 goto out;
 222         }
 223
 224         if (!cfg80211_chandef_valid(&vht_chandef)) {
 225                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 226                         sdata_info(sdata,
 227                                    "AP VHT information is invalid, disable VHT\n");
 228                 ret = IEEE80211_STA_DISABLE_VHT;
 229                 goto out;
 230         }
 231
 232         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 233                 ret = 0;
 234                 goto out;
 235         }
 236
 237         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 238                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 239                         sdata_info(sdata,
 240                                    "AP VHT information doesn't match HT, disable VHT\n");
 241                 ret = IEEE80211_STA_DISABLE_VHT;
 242                 goto out;
 243         }
 244
 245         *chandef = vht_chandef;
 246
 247         ret = 0;
 248
 249 out:
 250         /*
 251          * When tracking the current AP, don't do any further checks if the
 252          * new chandef is identical to the one we're currently using for the
 253          * connection. This keeps us from playing ping-pong with regulatory,
 254          * without it the following can happen (for example):
 255          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 256          *  - AP advertises regdom US
 257          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 258          *  - the code below detects an unsupported channel, downgrades, and
 259          *    we disconnect from the AP in the caller
 260          *  - disconnect causes CRDA to reload world regdomain and the game
 261          *    starts anew.
 262          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 263          *
 264          * It seems possible that there are still scenarios with CSA or real
 265          * bandwidth changes where a this could happen, but those cases are
 266          * less common and wouldn't completely prevent using the AP.
 267          */
 268         if (tracking &&
 269             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 270                 return ret;
 271
 272         /* don't print the message below for VHT mismatch if VHT is disabled */
 273         if (ret & IEEE80211_STA_DISABLE_VHT)
 274                 vht_chandef = *chandef;
 275
 276         /*
 277          * Ignore the DISABLED flag when we're already connected and only
 278          * tracking the APs beacon for bandwidth changes - otherwise we
 279          * might get disconnected here if we connect to an AP, update our
 280          * regulatory information based on the AP's country IE and the
 281          * information we have is wrong/outdated and disables the channel
 282          * that we're actually using for the connection to the AP.
 283          */
 284         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 285                                         tracking ? 0 :
 286                                                    IEEE80211_CHAN_DISABLED)) {
 287                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 288                         ret = IEEE80211_STA_DISABLE_HT |
 289                               IEEE80211_STA_DISABLE_VHT;
 290                         break;
 291                 }
 292
 293                 ret |= ieee80211_chandef_downgrade(chandef);
 294         }
 295
 296         if (chandef->width != vht_chandef.width && !tracking)
 297                 sdata_info(sdata,
 298                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 299
 300         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 301         return ret;
 302 }
 303
 304 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 305                                struct sta_info *sta,
 306                                const struct ieee80211_ht_cap *ht_cap,
 307                                const struct ieee80211_ht_operation *ht_oper,
 308                                const struct ieee80211_vht_operation *vht_oper,
 309                                const u8 *bssid, u32 *changed)
 310 {
 311         struct ieee80211_local *local = sdata->local;
 312         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 313         struct ieee80211_supported_band *sband;
 314         struct ieee80211_channel *chan;
 315         struct cfg80211_chan_def chandef;
 316         u16 ht_opmode;
 317         u32 flags;
 318         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 319         int ret;
 320
 321         /* if HT was/is disabled, don't track any bandwidth changes */
 322         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 323                 return 0;
 324
 325         /* don't check VHT if we associated as non-VHT station */
 326         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 327                 vht_oper = NULL;
 328
 329         if (WARN_ON_ONCE(!sta))
 330                 return -EINVAL;
 331
 332         /*
 333          * if bss configuration changed store the new one -
 334          * this may be applicable even if channel is identical
 335          */
 336         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 337         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 338                 *changed |= BSS_CHANGED_HT;
 339                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 340         }
 341
 342         chan = sdata->vif.bss_conf.chandef.chan;
 343         sband = local->hw.wiphy->bands[chan->band];
 344
 345         /* calculate new channel (type) based on HT/VHT operation IEs */
 346         flags = ieee80211_determine_chantype(sdata, sband, chan,
 347                                              ht_cap, ht_oper, vht_oper,
 348                                              &chandef, true);
 349
 350         /*
 351          * Downgrade the new channel if we associated with restricted
 352          * capabilities. For example, if we associated as a 20 MHz STA
 353          * to a 40 MHz AP (due to regulatory, capabilities or config
 354          * reasons) then switching to a 40 MHz channel now won't do us
 355          * any good -- we couldn't use it with the AP.
 356          */
 357         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 358             chandef.width == NL80211_CHAN_WIDTH_80P80)
 359                 flags |= ieee80211_chandef_downgrade(&chandef);
 360         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 361             chandef.width == NL80211_CHAN_WIDTH_160)
 362                 flags |= ieee80211_chandef_downgrade(&chandef);
 363         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 364             chandef.width > NL80211_CHAN_WIDTH_20)
 365                 flags |= ieee80211_chandef_downgrade(&chandef);
 366
 367         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 368                 return 0;
 369
 370         sdata_info(sdata,
 371                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 372                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 373                    chandef.center_freq1, chandef.center_freq2);
 374
 375         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 376                                       IEEE80211_STA_DISABLE_VHT |
 377                                       IEEE80211_STA_DISABLE_40MHZ |
 378                                       IEEE80211_STA_DISABLE_80P80MHZ |
 379                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 380             !cfg80211_chandef_valid(&chandef)) {
 381                 sdata_info(sdata,
 382                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 383                            ifmgd->bssid);
 384                 return -EINVAL;
 385         }
 386
 387         switch (chandef.width) {
 388         case NL80211_CHAN_WIDTH_20_NOHT:
 389         case NL80211_CHAN_WIDTH_20:
 390                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 391                 break;
 392         case NL80211_CHAN_WIDTH_40:
 393                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 394                 break;
 395         case NL80211_CHAN_WIDTH_80:
 396                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 397                 break;
 398         case NL80211_CHAN_WIDTH_80P80:
 399         case NL80211_CHAN_WIDTH_160:
 400                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 401                 break;
 402         default:
 403                 return -EINVAL;
 404         }
 405
 406         if (new_sta_bw > sta->cur_max_bandwidth)
 407                 new_sta_bw = sta->cur_max_bandwidth;
 408
 409         if (new_sta_bw < sta->sta.bandwidth) {
 410                 sta->sta.bandwidth = new_sta_bw;
 411                 rate_control_rate_update(local, sband, sta,
 412                                          IEEE80211_RC_BW_CHANGED);
 413         }
 414
 415         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 416         if (ret) {
 417                 sdata_info(sdata,
 418                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 419                            ifmgd->bssid);
 420                 return ret;
 421         }
 422
 423         if (new_sta_bw > sta->sta.bandwidth) {
 424                 sta->sta.bandwidth = new_sta_bw;
 425                 rate_control_rate_update(local, sband, sta,
 426                                          IEEE80211_RC_BW_CHANGED);
 427         }
 428
 429         return 0;
 430 }
 431
 432 /* frame sending functions */
 433
 434 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 435                                 struct sk_buff *skb, u8 ap_ht_param,
 436                                 struct ieee80211_supported_band *sband,
 437                                 struct ieee80211_channel *channel,
 438                                 enum ieee80211_smps_mode smps)
 439 {
 440         u8 *pos;
 441         u32 flags = channel->flags;
 442         u16 cap;
 443         struct ieee80211_sta_ht_cap ht_cap;
 444
 445         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 446
 447         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 448         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 449
 450         /* determine capability flags */
 451         cap = ht_cap.cap;
 452
 453         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 454         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 455                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 456                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 457                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 458                 }
 459                 break;
 460         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 461                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 462                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 463                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 464                 }
 465                 break;
 466         }
 467
 468         /*
 469          * If 40 MHz was disabled associate as though we weren't
 470          * capable of 40 MHz -- some broken APs will never fall
 471          * back to trying to transmit in 20 MHz.
 472          */
 473         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 474                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 475                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 476         }
 477
 478         /* set SM PS mode properly */
 479         cap &= ~IEEE80211_HT_CAP_SM_PS;
 480         switch (smps) {
 481         case IEEE80211_SMPS_AUTOMATIC:
 482         case IEEE80211_SMPS_NUM_MODES:
 483                 WARN_ON(1);
 484         case IEEE80211_SMPS_OFF:
 485                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 486                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 487                 break;
 488         case IEEE80211_SMPS_STATIC:
 489                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 490                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 491                 break;
 492         case IEEE80211_SMPS_DYNAMIC:
 493                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 494                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 495                 break;
 496         }
 497
 498         /* reserve and fill IE */
 499         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 500         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 501 }
 502
 503 /* This function determines vht capability flags for the association
 504  * and builds the IE.
 505  * Note - the function may set the owner of the MU-MIMO capability
 506  */
 507 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 508                                  struct sk_buff *skb,
 509                                  struct ieee80211_supported_band *sband,
 510                                  struct ieee80211_vht_cap *ap_vht_cap)
 511 {
 512         struct ieee80211_local *local = sdata->local;
 513         u8 *pos;
 514         u32 cap;
 515         struct ieee80211_sta_vht_cap vht_cap;
 516         u32 mask, ap_bf_sts, our_bf_sts;
 517
 518         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 519
 520         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 521         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 522
 523         /* determine capability flags */
 524         cap = vht_cap.cap;
 525
 526         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 527                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 528
 529                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 530                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 531                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 532                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 533         }
 534
 535         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 536                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 537                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 538         }
 539
 540         /*
 541          * Some APs apparently get confused if our capabilities are better
 542          * than theirs, so restrict what we advertise in the assoc request.
 543          */
 544         if (!(ap_vht_cap->vht_cap_info &
 545                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 546                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 547                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 548         else if (!(ap_vht_cap->vht_cap_info &
 549                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 550                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 551
 552         /*
 553          * If some other vif is using the MU-MIMO capablity we cannot associate
 554          * using MU-MIMO - this will lead to contradictions in the group-id
 555          * mechanism.
 556          * Ownership is defined since association request, in order to avoid
 557          * simultaneous associations with MU-MIMO.
 558          */
 559         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 560                 bool disable_mu_mimo = false;
 561                 struct ieee80211_sub_if_data *other;
 562
 563                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 564                         if (other->vif.mu_mimo_owner) {
 565                                 disable_mu_mimo = true;
 566                                 break;
 567                         }
 568                 }
 569                 if (disable_mu_mimo)
 570                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 571                 else
 572                         sdata->vif.mu_mimo_owner = true;
 573         }
 574
 575         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 576
 577         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 578         our_bf_sts = cap & mask;
 579
 580         if (ap_bf_sts < our_bf_sts) {
 581                 cap &= ~mask;
 582                 cap |= ap_bf_sts;
 583         }
 584
 585         /* reserve and fill IE */
 586         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 587         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 588 }
 589
 590 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 591 {
 592         struct ieee80211_local *local = sdata->local;
 593         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 594         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 595         struct sk_buff *skb;
 596         struct ieee80211_mgmt *mgmt;
 597         u8 *pos, qos_info;
 598         size_t offset = 0, noffset;
 599         int i, count, rates_len, supp_rates_len, shift;
 600         u16 capab;
 601         struct ieee80211_supported_band *sband;
 602         struct ieee80211_chanctx_conf *chanctx_conf;
 603         struct ieee80211_channel *chan;
 604         u32 rates = 0;
 605
 606         sdata_assert_lock(sdata);
 607
 608         rcu_read_lock();
 609         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 610         if (WARN_ON(!chanctx_conf)) {
 611                 rcu_read_unlock();
 612                 return;
 613         }
 614         chan = chanctx_conf->def.chan;
 615         rcu_read_unlock();
 616         sband = local->hw.wiphy->bands[chan->band];
 617         shift = ieee80211_vif_get_shift(&sdata->vif);
 618
 619         if (assoc_data->supp_rates_len) {
 620                 /*
 621                  * Get all rates supported by the device and the AP as
 622                  * some APs don't like getting a superset of their rates
 623                  * in the association request (e.g. D-Link DAP 1353 in
 624                  * b-only mode)...
 625                  */
 626                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 627                                                      assoc_data->supp_rates,
 628                                                      assoc_data->supp_rates_len,
 629                                                      &rates);
 630         } else {
 631                 /*
 632                  * In case AP not provide any supported rates information
 633                  * before association, we send information element(s) with
 634                  * all rates that we support.
 635                  */
 636                 rates_len = 0;
 637                 for (i = 0; i < sband->n_bitrates; i++) {
 638                         rates |= BIT(i);
 639                         rates_len++;
 640                 }
 641         }
 642
 643         skb = alloc_skb(local->hw.extra_tx_headroom +
 644                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 645                         2 + assoc_data->ssid_len + /* SSID */
 646                         4 + rates_len + /* (extended) rates */
 647                         4 + /* power capability */
 648                         2 + 2 * sband->n_channels + /* supported channels */
 649                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 650                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 651                         assoc_data->ie_len + /* extra IEs */
 652                         (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
 653                         9, /* WMM */
 654                         GFP_KERNEL);
 655         if (!skb)
 656                 return;
 657
 658         skb_reserve(skb, local->hw.extra_tx_headroom);
 659
 660         capab = WLAN_CAPABILITY_ESS;
 661
 662         if (sband->band == NL80211_BAND_2GHZ) {
 663                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 664                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 665         }
 666
 667         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 668                 capab |= WLAN_CAPABILITY_PRIVACY;
 669
 670         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 671             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 672                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 673
 674         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 675                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 676
 677         mgmt = skb_put_zero(skb, 24);
 678         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 679         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 680         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 681
 682         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 683                 skb_put(skb, 10);
 684                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 685                                                   IEEE80211_STYPE_REASSOC_REQ);
 686                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 687                 mgmt->u.reassoc_req.listen_interval =
 688                                 cpu_to_le16(local->hw.conf.listen_interval);
 689                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 690                        ETH_ALEN);
 691         } else {
 692                 skb_put(skb, 4);
 693                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 694                                                   IEEE80211_STYPE_ASSOC_REQ);
 695                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 696                 mgmt->u.assoc_req.listen_interval =
 697                                 cpu_to_le16(local->hw.conf.listen_interval);
 698         }
 699
 700         /* SSID */
 701         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 702         *pos++ = WLAN_EID_SSID;
 703         *pos++ = assoc_data->ssid_len;
 704         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 705
 706         /* add all rates which were marked to be used above */
 707         supp_rates_len = rates_len;
 708         if (supp_rates_len > 8)
 709                 supp_rates_len = 8;
 710
 711         pos = skb_put(skb, supp_rates_len + 2);
 712         *pos++ = WLAN_EID_SUPP_RATES;
 713         *pos++ = supp_rates_len;
 714
 715         count = 0;
 716         for (i = 0; i < sband->n_bitrates; i++) {
 717                 if (BIT(i) & rates) {
 718                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 719                                                 5 * (1 << shift));
 720                         *pos++ = (u8) rate;
 721                         if (++count == 8)
 722                                 break;
 723                 }
 724         }
 725
 726         if (rates_len > count) {
 727                 pos = skb_put(skb, rates_len - count + 2);
 728                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 729                 *pos++ = rates_len - count;
 730
 731                 for (i++; i < sband->n_bitrates; i++) {
 732                         if (BIT(i) & rates) {
 733                                 int rate;
 734                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 735                                                     5 * (1 << shift));
 736                                 *pos++ = (u8) rate;
 737                         }
 738                 }
 739         }
 740
 741         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 742             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 743                 pos = skb_put(skb, 4);
 744                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 745                 *pos++ = 2;
 746                 *pos++ = 0; /* min tx power */
 747                  /* max tx power */
 748                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 749         }
 750
 751         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 752                 /* TODO: get this in reg domain format */
 753                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 754                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 755                 *pos++ = 2 * sband->n_channels;
 756                 for (i = 0; i < sband->n_channels; i++) {
 757                         *pos++ = ieee80211_frequency_to_channel(
 758                                         sband->channels[i].center_freq);
 759                         *pos++ = 1; /* one channel in the subband*/
 760                 }
 761         }
 762
 763         /* if present, add any custom IEs that go before HT */
 764         if (assoc_data->ie_len) {
 765                 static const u8 before_ht[] = {
 766                         WLAN_EID_SSID,
 767                         WLAN_EID_SUPP_RATES,
 768                         WLAN_EID_EXT_SUPP_RATES,
 769                         WLAN_EID_PWR_CAPABILITY,
 770                         WLAN_EID_SUPPORTED_CHANNELS,
 771                         WLAN_EID_RSN,
 772                         WLAN_EID_QOS_CAPA,
 773                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 774                         WLAN_EID_MOBILITY_DOMAIN,
 775                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 776                         WLAN_EID_RIC_DATA,              /* reassoc only */
 777                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 778                 };
 779                 static const u8 after_ric[] = {
 780                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 781                         WLAN_EID_HT_CAPABILITY,
 782                         WLAN_EID_BSS_COEX_2040,
 783                         WLAN_EID_EXT_CAPABILITY,
 784                         WLAN_EID_QOS_TRAFFIC_CAPA,
 785                         WLAN_EID_TIM_BCAST_REQ,
 786                         WLAN_EID_INTERWORKING,
 787                         /* 60GHz doesn't happen right now */
 788                         WLAN_EID_VHT_CAPABILITY,
 789                         WLAN_EID_OPMODE_NOTIF,
 790                 };
 791
 792                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 793                                                  assoc_data->ie_len,
 794                                                  before_ht,
 795                                                  ARRAY_SIZE(before_ht),
 796                                                  after_ric,
 797                                                  ARRAY_SIZE(after_ric),
 798                                                  offset);
 799                 pos = skb_put(skb, noffset - offset);
 800                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 801                 offset = noffset;
 802         }
 803
 804         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 805                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 806                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 807
 808         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 809                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 810                                     sband, chan, sdata->smps_mode);
 811
 812         /* if present, add any custom IEs that go before VHT */
 813         if (assoc_data->ie_len) {
 814                 static const u8 before_vht[] = {
 815                         WLAN_EID_SSID,
 816                         WLAN_EID_SUPP_RATES,
 817                         WLAN_EID_EXT_SUPP_RATES,
 818                         WLAN_EID_PWR_CAPABILITY,
 819                         WLAN_EID_SUPPORTED_CHANNELS,
 820                         WLAN_EID_RSN,
 821                         WLAN_EID_QOS_CAPA,
 822                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 823                         WLAN_EID_MOBILITY_DOMAIN,
 824                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 825                         WLAN_EID_HT_CAPABILITY,
 826                         WLAN_EID_BSS_COEX_2040,
 827                         WLAN_EID_EXT_CAPABILITY,
 828                         WLAN_EID_QOS_TRAFFIC_CAPA,
 829                         WLAN_EID_TIM_BCAST_REQ,
 830                         WLAN_EID_INTERWORKING,
 831                 };
 832
 833                 /* RIC already taken above, so no need to handle here anymore */
 834                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 835                                              before_vht, ARRAY_SIZE(before_vht),
 836                                              offset);
 837                 pos = skb_put(skb, noffset - offset);
 838                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 839                 offset = noffset;
 840         }
 841
 842         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 843                 ieee80211_add_vht_ie(sdata, skb, sband,
 844                                      &assoc_data->ap_vht_cap);
 845
 846         /* if present, add any custom non-vendor IEs that go after HT */
 847         if (assoc_data->ie_len) {
 848                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 849                                                     assoc_data->ie_len,
 850                                                     offset);
 851                 pos = skb_put(skb, noffset - offset);
 852                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 853                 offset = noffset;
 854         }
 855
 856         if (assoc_data->wmm) {
 857                 if (assoc_data->uapsd) {
 858                         qos_info = ifmgd->uapsd_queues;
 859                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 860                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 861                 } else {
 862                         qos_info = 0;
 863                 }
 864
 865                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 866         }
 867
 868         /* add any remaining custom (i.e. vendor specific here) IEs */
 869         if (assoc_data->ie_len) {
 870                 noffset = assoc_data->ie_len;
 871                 pos = skb_put(skb, noffset - offset);
 872                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 873         }
 874
 875         if (assoc_data->fils_kek_len &&
 876             fils_encrypt_assoc_req(skb, assoc_data) < 0) {
 877                 dev_kfree_skb(skb);
 878                 return;
 879         }
 880
 881         drv_mgd_prepare_tx(local, sdata);
 882
 883         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 884         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 885                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 886                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 887         ieee80211_tx_skb(sdata, skb);
 888 }
 889
 890 void ieee80211_send_pspoll(struct ieee80211_local *local,
 891                            struct ieee80211_sub_if_data *sdata)
 892 {
 893         struct ieee80211_pspoll *pspoll;
 894         struct sk_buff *skb;
 895
 896         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 897         if (!skb)
 898                 return;
 899
 900         pspoll = (struct ieee80211_pspoll *) skb->data;
 901         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 902
 903         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 904         ieee80211_tx_skb(sdata, skb);
 905 }
 906
 907 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 908                              struct ieee80211_sub_if_data *sdata,
 909                              bool powersave)
 910 {
 911         struct sk_buff *skb;
 912         struct ieee80211_hdr_3addr *nullfunc;
 913         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 914
 915         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 916         if (!skb)
 917                 return;
 918
 919         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 920         if (powersave)
 921                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 922
 923         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 924                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 925
 926         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 927                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 928
 929         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 930                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 931
 932         ieee80211_tx_skb(sdata, skb);
 933 }
 934
 935 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 936                                           struct ieee80211_sub_if_data *sdata)
 937 {
 938         struct sk_buff *skb;
 939         struct ieee80211_hdr *nullfunc;
 940         __le16 fc;
 941
 942         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 943                 return;
 944
 945         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 946         if (!skb)
 947                 return;
 948
 949         skb_reserve(skb, local->hw.extra_tx_headroom);
 950
 951         nullfunc = skb_put_zero(skb, 30);
 952         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 953                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 954         nullfunc->frame_control = fc;
 955         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 956         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 957         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 958         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 959
 960         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 961         ieee80211_tx_skb(sdata, skb);
 962 }
 963
 964 /* spectrum management related things */
 965 static void ieee80211_chswitch_work(struct work_struct *work)
 966 {
 967         struct ieee80211_sub_if_data *sdata =
 968                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 969         struct ieee80211_local *local = sdata->local;
 970         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 971         int ret;
 972
 973         if (!ieee80211_sdata_running(sdata))
 974                 return;
 975
 976         sdata_lock(sdata);
 977         mutex_lock(&local->mtx);
 978         mutex_lock(&local->chanctx_mtx);
 979
 980         if (!ifmgd->associated)
 981                 goto out;
 982
 983         if (!sdata->vif.csa_active)
 984                 goto out;
 985
 986         /*
 987          * using reservation isn't immediate as it may be deferred until later
 988          * with multi-vif. once reservation is complete it will re-schedule the
 989          * work with no reserved_chanctx so verify chandef to check if it
 990          * completed successfully
 991          */
 992
 993         if (sdata->reserved_chanctx) {
 994                 /*
 995                  * with multi-vif csa driver may call ieee80211_csa_finish()
 996                  * many times while waiting for other interfaces to use their
 997                  * reservations
 998                  */
 999                 if (sdata->reserved_ready)
1000                         goto out;
1001
1002                 ret = ieee80211_vif_use_reserved_context(sdata);
1003                 if (ret) {
1004                         sdata_info(sdata,
1005                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1006                                    ret);
1007                         ieee80211_queue_work(&sdata->local->hw,
1008                                              &ifmgd->csa_connection_drop_work);
1009                         goto out;
1010                 }
1011
1012                 goto out;
1013         }
1014
1015         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1016                                         &sdata->csa_chandef)) {
1017                 sdata_info(sdata,
1018                            "failed to finalize channel switch, disconnecting\n");
1019                 ieee80211_queue_work(&sdata->local->hw,
1020                                      &ifmgd->csa_connection_drop_work);
1021                 goto out;
1022         }
1023
1024         /* XXX: shouldn't really modify cfg80211-owned data! */
1025         ifmgd->associated->channel = sdata->csa_chandef.chan;
1026
1027         ifmgd->csa_waiting_bcn = true;
1028
1029         ieee80211_sta_reset_beacon_monitor(sdata);
1030         ieee80211_sta_reset_conn_monitor(sdata);
1031
1032 out:
1033         mutex_unlock(&local->chanctx_mtx);
1034         mutex_unlock(&local->mtx);
1035         sdata_unlock(sdata);
1036 }
1037
1038 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1039 {
1040         struct ieee80211_local *local = sdata->local;
1041         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1042         int ret;
1043
1044         sdata_assert_lock(sdata);
1045
1046         WARN_ON(!sdata->vif.csa_active);
1047
1048         if (sdata->csa_block_tx) {
1049                 ieee80211_wake_vif_queues(local, sdata,
1050                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1051                 sdata->csa_block_tx = false;
1052         }
1053
1054         sdata->vif.csa_active = false;
1055         ifmgd->csa_waiting_bcn = false;
1056
1057         ret = drv_post_channel_switch(sdata);
1058         if (ret) {
1059                 sdata_info(sdata,
1060                            "driver post channel switch failed, disconnecting\n");
1061                 ieee80211_queue_work(&local->hw,
1062                                      &ifmgd->csa_connection_drop_work);
1063                 return;
1064         }
1065
1066         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1067 }
1068
1069 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1070 {
1071         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1072         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1073
1074         trace_api_chswitch_done(sdata, success);
1075         if (!success) {
1076                 sdata_info(sdata,
1077                            "driver channel switch failed, disconnecting\n");
1078                 ieee80211_queue_work(&sdata->local->hw,
1079                                      &ifmgd->csa_connection_drop_work);
1080         } else {
1081                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1082         }
1083 }
1084 EXPORT_SYMBOL(ieee80211_chswitch_done);
1085
1086 static void ieee80211_chswitch_timer(unsigned long data)
1087 {
1088         struct ieee80211_sub_if_data *sdata =
1089                 (struct ieee80211_sub_if_data *) data;
1090
1091         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1092 }
1093
1094 static void
1095 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1096                                  u64 timestamp, u32 device_timestamp,
1097                                  struct ieee802_11_elems *elems,
1098                                  bool beacon)
1099 {
1100         struct ieee80211_local *local = sdata->local;
1101         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1102         struct cfg80211_bss *cbss = ifmgd->associated;
1103         struct ieee80211_chanctx_conf *conf;
1104         struct ieee80211_chanctx *chanctx;
1105         enum nl80211_band current_band;
1106         struct ieee80211_csa_ie csa_ie;
1107         struct ieee80211_channel_switch ch_switch;
1108         int res;
1109
1110         sdata_assert_lock(sdata);
1111
1112         if (!cbss)
1113                 return;
1114
1115         if (local->scanning)
1116                 return;
1117
1118         /* disregard subsequent announcements if we are already processing */
1119         if (sdata->vif.csa_active)
1120                 return;
1121
1122         current_band = cbss->channel->band;
1123         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1124                                            ifmgd->flags,
1125                                            ifmgd->associated->bssid, &csa_ie);
1126         if (res < 0)
1127                 ieee80211_queue_work(&local->hw,
1128                                      &ifmgd->csa_connection_drop_work);
1129         if (res)
1130                 return;
1131
1132         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1133                                      IEEE80211_CHAN_DISABLED)) {
1134                 sdata_info(sdata,
1135                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1136                            ifmgd->associated->bssid,
1137                            csa_ie.chandef.chan->center_freq,
1138                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1139                            csa_ie.chandef.center_freq2);
1140                 ieee80211_queue_work(&local->hw,
1141                                      &ifmgd->csa_connection_drop_work);
1142                 return;
1143         }
1144
1145         if (cfg80211_chandef_identical(&csa_ie.chandef,
1146                                        &sdata->vif.bss_conf.chandef)) {
1147                 if (ifmgd->csa_ignored_same_chan)
1148                         return;
1149                 sdata_info(sdata,
1150                            "AP %pM tries to chanswitch to same channel, ignore\n",
1151                            ifmgd->associated->bssid);
1152                 ifmgd->csa_ignored_same_chan = true;
1153                 return;
1154         }
1155
1156         /*
1157          * Drop all TDLS peers - either we disconnect or move to a different
1158          * channel from this point on. There's no telling what our peer will do.
1159          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1160          * have an incompatible wider chandef.
1161          */
1162         ieee80211_teardown_tdls_peers(sdata);
1163
1164         mutex_lock(&local->mtx);
1165         mutex_lock(&local->chanctx_mtx);
1166         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1167                                          lockdep_is_held(&local->chanctx_mtx));
1168         if (!conf) {
1169                 sdata_info(sdata,
1170                            "no channel context assigned to vif?, disconnecting\n");
1171                 goto drop_connection;
1172         }
1173
1174         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1175
1176         if (local->use_chanctx &&
1177             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1178                 sdata_info(sdata,
1179                            "driver doesn't support chan-switch with channel contexts\n");
1180                 goto drop_connection;
1181         }
1182
1183         ch_switch.timestamp = timestamp;
1184         ch_switch.device_timestamp = device_timestamp;
1185         ch_switch.block_tx = csa_ie.mode;
1186         ch_switch.chandef = csa_ie.chandef;
1187         ch_switch.count = csa_ie.count;
1188
1189         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1190                 sdata_info(sdata,
1191                            "preparing for channel switch failed, disconnecting\n");
1192                 goto drop_connection;
1193         }
1194
1195         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1196                                             chanctx->mode, false);
1197         if (res) {
1198                 sdata_info(sdata,
1199                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1200                            res);
1201                 goto drop_connection;
1202         }
1203         mutex_unlock(&local->chanctx_mtx);
1204
1205         sdata->vif.csa_active = true;
1206         sdata->csa_chandef = csa_ie.chandef;
1207         sdata->csa_block_tx = csa_ie.mode;
1208         ifmgd->csa_ignored_same_chan = false;
1209
1210         if (sdata->csa_block_tx)
1211                 ieee80211_stop_vif_queues(local, sdata,
1212                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1213         mutex_unlock(&local->mtx);
1214
1215         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1216                                           csa_ie.count);
1217
1218         if (local->ops->channel_switch) {
1219                 /* use driver's channel switch callback */
1220                 drv_channel_switch(local, sdata, &ch_switch);
1221                 return;
1222         }
1223
1224         /* channel switch handled in software */
1225         if (csa_ie.count <= 1)
1226                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1227         else
1228                 mod_timer(&ifmgd->chswitch_timer,
1229                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1230                                          cbss->beacon_interval));
1231         return;
1232  drop_connection:
1233         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1234         mutex_unlock(&local->chanctx_mtx);
1235         mutex_unlock(&local->mtx);
1236 }
1237
1238 static bool
1239 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1240                                  struct ieee80211_channel *channel,
1241                                  const u8 *country_ie, u8 country_ie_len,
1242                                  const u8 *pwr_constr_elem,
1243                                  int *chan_pwr, int *pwr_reduction)
1244 {
1245         struct ieee80211_country_ie_triplet *triplet;
1246         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1247         int i, chan_increment;
1248         bool have_chan_pwr = false;
1249
1250         /* Invalid IE */
1251         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1252                 return false;
1253
1254         triplet = (void *)(country_ie + 3);
1255         country_ie_len -= 3;
1256
1257         switch (channel->band) {
1258         default:
1259                 WARN_ON_ONCE(1);
1260                 /* fall through */
1261         case NL80211_BAND_2GHZ:
1262         case NL80211_BAND_60GHZ:
1263                 chan_increment = 1;
1264                 break;
1265         case NL80211_BAND_5GHZ:
1266                 chan_increment = 4;
1267                 break;
1268         }
1269
1270         /* find channel */
1271         while (country_ie_len >= 3) {
1272                 u8 first_channel = triplet->chans.first_channel;
1273
1274                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1275                         goto next;
1276
1277                 for (i = 0; i < triplet->chans.num_channels; i++) {
1278                         if (first_channel + i * chan_increment == chan) {
1279                                 have_chan_pwr = true;
1280                                 *chan_pwr = triplet->chans.max_power;
1281                                 break;
1282                         }
1283                 }
1284                 if (have_chan_pwr)
1285                         break;
1286
1287  next:
1288                 triplet++;
1289                 country_ie_len -= 3;
1290         }
1291
1292         if (have_chan_pwr && pwr_constr_elem)
1293                 *pwr_reduction = *pwr_constr_elem;
1294         else
1295                 *pwr_reduction = 0;
1296
1297         return have_chan_pwr;
1298 }
1299
1300 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1301                                       struct ieee80211_channel *channel,
1302                                       const u8 *cisco_dtpc_ie,
1303                                       int *pwr_level)
1304 {
1305         /* From practical testing, the first data byte of the DTPC element
1306          * seems to contain the requested dBm level, and the CLI on Cisco
1307          * APs clearly state the range is -127 to 127 dBm, which indicates
1308          * a signed byte, although it seemingly never actually goes negative.
1309          * The other byte seems to always be zero.
1310          */
1311         *pwr_level = (__s8)cisco_dtpc_ie[4];
1312 }
1313
1314 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1315                                        struct ieee80211_channel *channel,
1316                                        struct ieee80211_mgmt *mgmt,
1317                                        const u8 *country_ie, u8 country_ie_len,
1318                                        const u8 *pwr_constr_ie,
1319                                        const u8 *cisco_dtpc_ie)
1320 {
1321         bool has_80211h_pwr = false, has_cisco_pwr = false;
1322         int chan_pwr = 0, pwr_reduction_80211h = 0;
1323         int pwr_level_cisco, pwr_level_80211h;
1324         int new_ap_level;
1325         __le16 capab = mgmt->u.probe_resp.capab_info;
1326
1327         if (country_ie &&
1328             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1329              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1330                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1331                         sdata, channel, country_ie, country_ie_len,
1332                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1333                 pwr_level_80211h =
1334                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1335         }
1336
1337         if (cisco_dtpc_ie) {
1338                 ieee80211_find_cisco_dtpc(
1339                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1340                 has_cisco_pwr = true;
1341         }
1342
1343         if (!has_80211h_pwr && !has_cisco_pwr)
1344                 return 0;
1345
1346         /* If we have both 802.11h and Cisco DTPC, apply both limits
1347          * by picking the smallest of the two power levels advertised.
1348          */
1349         if (has_80211h_pwr &&
1350             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1351                 new_ap_level = pwr_level_80211h;
1352
1353                 if (sdata->ap_power_level == new_ap_level)
1354                         return 0;
1355
1356                 sdata_dbg(sdata,
1357                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1358                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1359                           sdata->u.mgd.bssid);
1360         } else {  /* has_cisco_pwr is always true here. */
1361                 new_ap_level = pwr_level_cisco;
1362
1363                 if (sdata->ap_power_level == new_ap_level)
1364                         return 0;
1365
1366                 sdata_dbg(sdata,
1367                           "Limiting TX power to %d dBm as advertised by %pM\n",
1368                           pwr_level_cisco, sdata->u.mgd.bssid);
1369         }
1370
1371         sdata->ap_power_level = new_ap_level;
1372         if (__ieee80211_recalc_txpower(sdata))
1373                 return BSS_CHANGED_TXPOWER;
1374         return 0;
1375 }
1376
1377 /* powersave */
1378 static void ieee80211_enable_ps(struct ieee80211_local *local,
1379                                 struct ieee80211_sub_if_data *sdata)
1380 {
1381         struct ieee80211_conf *conf = &local->hw.conf;
1382
1383         /*
1384          * If we are scanning right now then the parameters will
1385          * take effect when scan finishes.
1386          */
1387         if (local->scanning)
1388                 return;
1389
1390         if (conf->dynamic_ps_timeout > 0 &&
1391             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1392                 mod_timer(&local->dynamic_ps_timer, jiffies +
1393                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1394         } else {
1395                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1396                         ieee80211_send_nullfunc(local, sdata, true);
1397
1398                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1399                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1400                         return;
1401
1402                 conf->flags |= IEEE80211_CONF_PS;
1403                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1404         }
1405 }
1406
1407 static void ieee80211_change_ps(struct ieee80211_local *local)
1408 {
1409         struct ieee80211_conf *conf = &local->hw.conf;
1410
1411         if (local->ps_sdata) {
1412                 ieee80211_enable_ps(local, local->ps_sdata);
1413         } else if (conf->flags & IEEE80211_CONF_PS) {
1414                 conf->flags &= ~IEEE80211_CONF_PS;
1415                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1416                 del_timer_sync(&local->dynamic_ps_timer);
1417                 cancel_work_sync(&local->dynamic_ps_enable_work);
1418         }
1419 }
1420
1421 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1422 {
1423         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1424         struct sta_info *sta = NULL;
1425         bool authorized = false;
1426
1427         if (!mgd->powersave)
1428                 return false;
1429
1430         if (mgd->broken_ap)
1431                 return false;
1432
1433         if (!mgd->associated)
1434                 return false;
1435
1436         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1437                 return false;
1438
1439         if (!mgd->have_beacon)
1440                 return false;
1441
1442         rcu_read_lock();
1443         sta = sta_info_get(sdata, mgd->bssid);
1444         if (sta)
1445                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1446         rcu_read_unlock();
1447
1448         return authorized;
1449 }
1450
1451 /* need to hold RTNL or interface lock */
1452 void ieee80211_recalc_ps(struct ieee80211_local *local)
1453 {
1454         struct ieee80211_sub_if_data *sdata, *found = NULL;
1455         int count = 0;
1456         int timeout;
1457
1458         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1459                 local->ps_sdata = NULL;
1460                 return;
1461         }
1462
1463         list_for_each_entry(sdata, &local->interfaces, list) {
1464                 if (!ieee80211_sdata_running(sdata))
1465                         continue;
1466                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1467                         /* If an AP vif is found, then disable PS
1468                          * by setting the count to zero thereby setting
1469                          * ps_sdata to NULL.
1470                          */
1471                         count = 0;
1472                         break;
1473                 }
1474                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1475                         continue;
1476                 found = sdata;
1477                 count++;
1478         }
1479
1480         if (count == 1 && ieee80211_powersave_allowed(found)) {
1481                 u8 dtimper = found->u.mgd.dtim_period;
1482
1483                 timeout = local->dynamic_ps_forced_timeout;
1484                 if (timeout < 0)
1485                         timeout = 100;
1486                 local->hw.conf.dynamic_ps_timeout = timeout;
1487
1488                 /* If the TIM IE is invalid, pretend the value is 1 */
1489                 if (!dtimper)
1490                         dtimper = 1;
1491
1492                 local->hw.conf.ps_dtim_period = dtimper;
1493                 local->ps_sdata = found;
1494         } else {
1495                 local->ps_sdata = NULL;
1496         }
1497
1498         ieee80211_change_ps(local);
1499 }
1500
1501 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1502 {
1503         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1504
1505         if (sdata->vif.bss_conf.ps != ps_allowed) {
1506                 sdata->vif.bss_conf.ps = ps_allowed;
1507                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1508         }
1509 }
1510
1511 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1512 {
1513         struct ieee80211_local *local =
1514                 container_of(work, struct ieee80211_local,
1515                              dynamic_ps_disable_work);
1516
1517         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1518                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1519                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1520         }
1521
1522         ieee80211_wake_queues_by_reason(&local->hw,
1523                                         IEEE80211_MAX_QUEUE_MAP,
1524                                         IEEE80211_QUEUE_STOP_REASON_PS,
1525                                         false);
1526 }
1527
1528 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1529 {
1530         struct ieee80211_local *local =
1531                 container_of(work, struct ieee80211_local,
1532                              dynamic_ps_enable_work);
1533         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1534         struct ieee80211_if_managed *ifmgd;
1535         unsigned long flags;
1536         int q;
1537
1538         /* can only happen when PS was just disabled anyway */
1539         if (!sdata)
1540                 return;
1541
1542         ifmgd = &sdata->u.mgd;
1543
1544         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1545                 return;
1546
1547         if (local->hw.conf.dynamic_ps_timeout > 0) {
1548                 /* don't enter PS if TX frames are pending */
1549                 if (drv_tx_frames_pending(local)) {
1550                         mod_timer(&local->dynamic_ps_timer, jiffies +
1551                                   msecs_to_jiffies(
1552                                   local->hw.conf.dynamic_ps_timeout));
1553                         return;
1554                 }
1555
1556                 /*
1557                  * transmission can be stopped by others which leads to
1558                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1559                  * is not the actual idle state.
1560                  */
1561                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1562                 for (q = 0; q < local->hw.queues; q++) {
1563                         if (local->queue_stop_reasons[q]) {
1564                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1565                                                        flags);
1566                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1567                                           msecs_to_jiffies(
1568                                           local->hw.conf.dynamic_ps_timeout));
1569                                 return;
1570                         }
1571                 }
1572                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1573         }
1574
1575         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1576             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1577                 if (drv_tx_frames_pending(local)) {
1578                         mod_timer(&local->dynamic_ps_timer, jiffies +
1579                                   msecs_to_jiffies(
1580                                   local->hw.conf.dynamic_ps_timeout));
1581                 } else {
1582                         ieee80211_send_nullfunc(local, sdata, true);
1583                         /* Flush to get the tx status of nullfunc frame */
1584                         ieee80211_flush_queues(local, sdata, false);
1585                 }
1586         }
1587
1588         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1589               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1590             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1591                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1592                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1593                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1594         }
1595 }
1596
1597 void ieee80211_dynamic_ps_timer(unsigned long data)
1598 {
1599         struct ieee80211_local *local = (void *) data;
1600
1601         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1602 }
1603
1604 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1605 {
1606         struct delayed_work *delayed_work = to_delayed_work(work);
1607         struct ieee80211_sub_if_data *sdata =
1608                 container_of(delayed_work, struct ieee80211_sub_if_data,
1609                              dfs_cac_timer_work);
1610         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1611
1612         mutex_lock(&sdata->local->mtx);
1613         if (sdata->wdev.cac_started) {
1614                 ieee80211_vif_release_channel(sdata);
1615                 cfg80211_cac_event(sdata->dev, &chandef,
1616                                    NL80211_RADAR_CAC_FINISHED,
1617                                    GFP_KERNEL);
1618         }
1619         mutex_unlock(&sdata->local->mtx);
1620 }
1621
1622 static bool
1623 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1624 {
1625         struct ieee80211_local *local = sdata->local;
1626         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1627         bool ret = false;
1628         int ac;
1629
1630         if (local->hw.queues < IEEE80211_NUM_ACS)
1631                 return false;
1632
1633         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1634                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1635                 int non_acm_ac;
1636                 unsigned long now = jiffies;
1637
1638                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1639                     tx_tspec->admitted_time &&
1640                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1641                         tx_tspec->consumed_tx_time = 0;
1642                         tx_tspec->time_slice_start = now;
1643
1644                         if (tx_tspec->downgraded)
1645                                 tx_tspec->action =
1646                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1647                 }
1648
1649                 switch (tx_tspec->action) {
1650                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1651                         /* take the original parameters */
1652                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1653                                 sdata_err(sdata,
1654                                           "failed to set TX queue parameters for queue %d\n",
1655                                           ac);
1656                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1657                         tx_tspec->downgraded = false;
1658                         ret = true;
1659                         break;
1660                 case TX_TSPEC_ACTION_DOWNGRADE:
1661                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1662                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1663                                 ret = true;
1664                                 break;
1665                         }
1666                         /* downgrade next lower non-ACM AC */
1667                         for (non_acm_ac = ac + 1;
1668                              non_acm_ac < IEEE80211_NUM_ACS;
1669                              non_acm_ac++)
1670                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1671                                         break;
1672                         /* Usually the loop will result in using BK even if it
1673                          * requires admission control, but such a configuration
1674                          * makes no sense and we have to transmit somehow - the
1675                          * AC selection does the same thing.
1676                          * If we started out trying to downgrade from BK, then
1677                          * the extra condition here might be needed.
1678                          */
1679                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1680                                 non_acm_ac = IEEE80211_AC_BK;
1681                         if (drv_conf_tx(local, sdata, ac,
1682                                         &sdata->tx_conf[non_acm_ac]))
1683                                 sdata_err(sdata,
1684                                           "failed to set TX queue parameters for queue %d\n",
1685                                           ac);
1686                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1687                         ret = true;
1688                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1689                                 tx_tspec->time_slice_start + HZ - now + 1);
1690                         break;
1691                 case TX_TSPEC_ACTION_NONE:
1692                         /* nothing now */
1693                         break;
1694                 }
1695         }
1696
1697         return ret;
1698 }
1699
1700 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1701 {
1702         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1703                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1704 }
1705
1706 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1707 {
1708         struct ieee80211_sub_if_data *sdata;
1709
1710         sdata = container_of(work, struct ieee80211_sub_if_data,
1711                              u.mgd.tx_tspec_wk.work);
1712         ieee80211_sta_handle_tspec_ac_params(sdata);
1713 }
1714
1715 /* MLME */
1716 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1717                                      struct ieee80211_sub_if_data *sdata,
1718                                      const u8 *wmm_param, size_t wmm_param_len)
1719 {
1720         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1721         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1722         size_t left;
1723         int count, ac;
1724         const u8 *pos;
1725         u8 uapsd_queues = 0;
1726
1727         if (!local->ops->conf_tx)
1728                 return false;
1729
1730         if (local->hw.queues < IEEE80211_NUM_ACS)
1731                 return false;
1732
1733         if (!wmm_param)
1734                 return false;
1735
1736         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1737                 return false;
1738
1739         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1740                 uapsd_queues = ifmgd->uapsd_queues;
1741
1742         count = wmm_param[6] & 0x0f;
1743         if (count == ifmgd->wmm_last_param_set)
1744                 return false;
1745         ifmgd->wmm_last_param_set = count;
1746
1747         pos = wmm_param + 8;
1748         left = wmm_param_len - 8;
1749
1750         memset(&params, 0, sizeof(params));
1751
1752         sdata->wmm_acm = 0;
1753         for (; left >= 4; left -= 4, pos += 4) {
1754                 int aci = (pos[0] >> 5) & 0x03;
1755                 int acm = (pos[0] >> 4) & 0x01;
1756                 bool uapsd = false;
1757
1758                 switch (aci) {
1759                 case 1: /* AC_BK */
1760                         ac = IEEE80211_AC_BK;
1761                         if (acm)
1762                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1763                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1764                                 uapsd = true;
1765                         break;
1766                 case 2: /* AC_VI */
1767                         ac = IEEE80211_AC_VI;
1768                         if (acm)
1769                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1770                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1771                                 uapsd = true;
1772                         break;
1773                 case 3: /* AC_VO */
1774                         ac = IEEE80211_AC_VO;
1775                         if (acm)
1776                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1777                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1778                                 uapsd = true;
1779                         break;
1780                 case 0: /* AC_BE */
1781                 default:
1782                         ac = IEEE80211_AC_BE;
1783                         if (acm)
1784                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1785                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1786                                 uapsd = true;
1787                         break;
1788                 }
1789
1790                 params[ac].aifs = pos[0] & 0x0f;
1791
1792                 if (params[ac].aifs < 2) {
1793                         sdata_info(sdata,
1794                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1795                                    params[ac].aifs, aci);
1796                         params[ac].aifs = 2;
1797                 }
1798                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1799                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1800                 params[ac].txop = get_unaligned_le16(pos + 2);
1801                 params[ac].acm = acm;
1802                 params[ac].uapsd = uapsd;
1803
1804                 if (params[ac].cw_min > params[ac].cw_max) {
1805                         sdata_info(sdata,
1806                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1807                                    params[ac].cw_min, params[ac].cw_max, aci);
1808                         return false;
1809                 }
1810         }
1811
1812         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1813                 mlme_dbg(sdata,
1814                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1815                          ac, params[ac].acm,
1816                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1817                          params[ac].txop, params[ac].uapsd,
1818                          ifmgd->tx_tspec[ac].downgraded);
1819                 sdata->tx_conf[ac] = params[ac];
1820                 if (!ifmgd->tx_tspec[ac].downgraded &&
1821                     drv_conf_tx(local, sdata, ac, &params[ac]))
1822                         sdata_err(sdata,
1823                                   "failed to set TX queue parameters for AC %d\n",
1824                                   ac);
1825         }
1826
1827         /* enable WMM or activate new settings */
1828         sdata->vif.bss_conf.qos = true;
1829         return true;
1830 }
1831
1832 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1833 {
1834         lockdep_assert_held(&sdata->local->mtx);
1835
1836         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1837         ieee80211_run_deferred_scan(sdata->local);
1838 }
1839
1840 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1841 {
1842         mutex_lock(&sdata->local->mtx);
1843         __ieee80211_stop_poll(sdata);
1844         mutex_unlock(&sdata->local->mtx);
1845 }
1846
1847 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1848                                            u16 capab, bool erp_valid, u8 erp)
1849 {
1850         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1851         struct ieee80211_supported_band *sband;
1852         u32 changed = 0;
1853         bool use_protection;
1854         bool use_short_preamble;
1855         bool use_short_slot;
1856
1857         sband = ieee80211_get_sband(sdata);
1858         if (!sband)
1859                 return changed;
1860
1861         if (erp_valid) {
1862                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1863                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1864         } else {
1865                 use_protection = false;
1866                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1867         }
1868
1869         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1870         if (sband->band == NL80211_BAND_5GHZ)
1871                 use_short_slot = true;
1872
1873         if (use_protection != bss_conf->use_cts_prot) {
1874                 bss_conf->use_cts_prot = use_protection;
1875                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1876         }
1877
1878         if (use_short_preamble != bss_conf->use_short_preamble) {
1879                 bss_conf->use_short_preamble = use_short_preamble;
1880                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1881         }
1882
1883         if (use_short_slot != bss_conf->use_short_slot) {
1884                 bss_conf->use_short_slot = use_short_slot;
1885                 changed |= BSS_CHANGED_ERP_SLOT;
1886         }
1887
1888         return changed;
1889 }
1890
1891 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1892                                      struct cfg80211_bss *cbss,
1893                                      u32 bss_info_changed)
1894 {
1895         struct ieee80211_bss *bss = (void *)cbss->priv;
1896         struct ieee80211_local *local = sdata->local;
1897         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1898
1899         bss_info_changed |= BSS_CHANGED_ASSOC;
1900         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1901                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1902
1903         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1904                 beacon_loss_count * bss_conf->beacon_int));
1905
1906         sdata->u.mgd.associated = cbss;
1907         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1908
1909         ieee80211_check_rate_mask(sdata);
1910
1911         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1912
1913         if (sdata->vif.p2p ||
1914             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1915                 const struct cfg80211_bss_ies *ies;
1916
1917                 rcu_read_lock();
1918                 ies = rcu_dereference(cbss->ies);
1919                 if (ies) {
1920                         int ret;
1921
1922                         ret = cfg80211_get_p2p_attr(
1923                                         ies->data, ies->len,
1924                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1925                                         (u8 *) &bss_conf->p2p_noa_attr,
1926                                         sizeof(bss_conf->p2p_noa_attr));
1927                         if (ret >= 2) {
1928                                 sdata->u.mgd.p2p_noa_index =
1929                                         bss_conf->p2p_noa_attr.index;
1930                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1931                         }
1932                 }
1933                 rcu_read_unlock();
1934         }
1935
1936         /* just to be sure */
1937         ieee80211_stop_poll(sdata);
1938
1939         ieee80211_led_assoc(local, 1);
1940
1941         if (sdata->u.mgd.have_beacon) {
1942                 /*
1943                  * If the AP is buggy we may get here with no DTIM period
1944                  * known, so assume it's 1 which is the only safe assumption
1945                  * in that case, although if the TIM IE is broken powersave
1946                  * probably just won't work at all.
1947                  */
1948                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1949                 bss_conf->beacon_rate = bss->beacon_rate;
1950                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1951         } else {
1952                 bss_conf->beacon_rate = NULL;
1953                 bss_conf->dtim_period = 0;
1954         }
1955
1956         bss_conf->assoc = 1;
1957
1958         /* Tell the driver to monitor connection quality (if supported) */
1959         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1960             bss_conf->cqm_rssi_thold)
1961                 bss_info_changed |= BSS_CHANGED_CQM;
1962
1963         /* Enable ARP filtering */
1964         if (bss_conf->arp_addr_cnt)
1965                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1966
1967         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1968
1969         mutex_lock(&local->iflist_mtx);
1970         ieee80211_recalc_ps(local);
1971         mutex_unlock(&local->iflist_mtx);
1972
1973         ieee80211_recalc_smps(sdata);
1974         ieee80211_recalc_ps_vif(sdata);
1975
1976         netif_carrier_on(sdata->dev);
1977 }
1978
1979 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1980                                    u16 stype, u16 reason, bool tx,
1981                                    u8 *frame_buf)
1982 {
1983         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1984         struct ieee80211_local *local = sdata->local;
1985         u32 changed = 0;
1986
1987         sdata_assert_lock(sdata);
1988
1989         if (WARN_ON_ONCE(tx && !frame_buf))
1990                 return;
1991
1992         if (WARN_ON(!ifmgd->associated))
1993                 return;
1994
1995         ieee80211_stop_poll(sdata);
1996
1997         ifmgd->associated = NULL;
1998         netif_carrier_off(sdata->dev);
1999
2000         /*
2001          * if we want to get out of ps before disassoc (why?) we have
2002          * to do it before sending disassoc, as otherwise the null-packet
2003          * won't be valid.
2004          */
2005         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2006                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2007                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2008         }
2009         local->ps_sdata = NULL;
2010
2011         /* disable per-vif ps */
2012         ieee80211_recalc_ps_vif(sdata);
2013
2014         /* make sure ongoing transmission finishes */
2015         synchronize_net();
2016
2017         /*
2018          * drop any frame before deauth/disassoc, this can be data or
2019          * management frame. Since we are disconnecting, we should not
2020          * insist sending these frames which can take time and delay
2021          * the disconnection and possible the roaming.
2022          */
2023         if (tx)
2024                 ieee80211_flush_queues(local, sdata, true);
2025
2026         /* deauthenticate/disassociate now */
2027         if (tx || frame_buf)
2028                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2029                                                reason, tx, frame_buf);
2030
2031         /* flush out frame - make sure the deauth was actually sent */
2032         if (tx)
2033                 ieee80211_flush_queues(local, sdata, false);
2034
2035         /* clear bssid only after building the needed mgmt frames */
2036         eth_zero_addr(ifmgd->bssid);
2037
2038         /* remove AP and TDLS peers */
2039         sta_info_flush(sdata);
2040
2041         /* finally reset all BSS / config parameters */
2042         changed |= ieee80211_reset_erp_info(sdata);
2043
2044         ieee80211_led_assoc(local, 0);
2045         changed |= BSS_CHANGED_ASSOC;
2046         sdata->vif.bss_conf.assoc = false;
2047
2048         ifmgd->p2p_noa_index = -1;
2049         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2050                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2051
2052         /* on the next assoc, re-program HT/VHT parameters */
2053         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2054         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2055         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2056         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2057
2058         /* reset MU-MIMO ownership and group data */
2059         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2060                sizeof(sdata->vif.bss_conf.mu_group.membership));
2061         memset(sdata->vif.bss_conf.mu_group.position, 0,
2062                sizeof(sdata->vif.bss_conf.mu_group.position));
2063         changed |= BSS_CHANGED_MU_GROUPS;
2064         sdata->vif.mu_mimo_owner = false;
2065
2066         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2067
2068         del_timer_sync(&local->dynamic_ps_timer);
2069         cancel_work_sync(&local->dynamic_ps_enable_work);
2070
2071         /* Disable ARP filtering */
2072         if (sdata->vif.bss_conf.arp_addr_cnt)
2073                 changed |= BSS_CHANGED_ARP_FILTER;
2074
2075         sdata->vif.bss_conf.qos = false;
2076         changed |= BSS_CHANGED_QOS;
2077
2078         /* The BSSID (not really interesting) and HT changed */
2079         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2080         ieee80211_bss_info_change_notify(sdata, changed);
2081
2082         /* disassociated - set to defaults now */
2083         ieee80211_set_wmm_default(sdata, false, false);
2084
2085         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2086         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2087         del_timer_sync(&sdata->u.mgd.timer);
2088         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2089
2090         sdata->vif.bss_conf.dtim_period = 0;
2091         sdata->vif.bss_conf.beacon_rate = NULL;
2092
2093         ifmgd->have_beacon = false;
2094
2095         ifmgd->flags = 0;
2096         mutex_lock(&local->mtx);
2097         ieee80211_vif_release_channel(sdata);
2098
2099         sdata->vif.csa_active = false;
2100         ifmgd->csa_waiting_bcn = false;
2101         ifmgd->csa_ignored_same_chan = false;
2102         if (sdata->csa_block_tx) {
2103                 ieee80211_wake_vif_queues(local, sdata,
2104                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2105                 sdata->csa_block_tx = false;
2106         }
2107         mutex_unlock(&local->mtx);
2108
2109         /* existing TX TSPEC sessions no longer exist */
2110         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2111         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2112
2113         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2114 }
2115
2116 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2117                              struct ieee80211_hdr *hdr)
2118 {
2119         /*
2120          * We can postpone the mgd.timer whenever receiving unicast frames
2121          * from AP because we know that the connection is working both ways
2122          * at that time. But multicast frames (and hence also beacons) must
2123          * be ignored here, because we need to trigger the timer during
2124          * data idle periods for sending the periodic probe request to the
2125          * AP we're connected to.
2126          */
2127         if (is_multicast_ether_addr(hdr->addr1))
2128                 return;
2129
2130         ieee80211_sta_reset_conn_monitor(sdata);
2131 }
2132
2133 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2134 {
2135         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2136         struct ieee80211_local *local = sdata->local;
2137
2138         mutex_lock(&local->mtx);
2139         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2140                 goto out;
2141
2142         __ieee80211_stop_poll(sdata);
2143
2144         mutex_lock(&local->iflist_mtx);
2145         ieee80211_recalc_ps(local);
2146         mutex_unlock(&local->iflist_mtx);
2147
2148         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2149                 goto out;
2150
2151         /*
2152          * We've received a probe response, but are not sure whether
2153          * we have or will be receiving any beacons or data, so let's
2154          * schedule the timers again, just in case.
2155          */
2156         ieee80211_sta_reset_beacon_monitor(sdata);
2157
2158         mod_timer(&ifmgd->conn_mon_timer,
2159                   round_jiffies_up(jiffies +
2160                                    IEEE80211_CONNECTION_IDLE_TIME));
2161 out:
2162         mutex_unlock(&local->mtx);
2163 }
2164
2165 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2166                                            struct ieee80211_hdr *hdr,
2167                                            u16 tx_time)
2168 {
2169         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2170         u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2171         int ac = ieee80211_ac_from_tid(tid);
2172         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2173         unsigned long now = jiffies;
2174
2175         if (likely(!tx_tspec->admitted_time))
2176                 return;
2177
2178         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2179                 tx_tspec->consumed_tx_time = 0;
2180                 tx_tspec->time_slice_start = now;
2181
2182                 if (tx_tspec->downgraded) {
2183                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2184                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2185                 }
2186         }
2187
2188         if (tx_tspec->downgraded)
2189                 return;
2190
2191         tx_tspec->consumed_tx_time += tx_time;
2192
2193         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2194                 tx_tspec->downgraded = true;
2195                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2196                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2197         }
2198 }
2199
2200 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2201                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2202 {
2203         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2204
2205         if (!ieee80211_is_data(hdr->frame_control))
2206             return;
2207
2208         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2209             sdata->u.mgd.probe_send_count > 0) {
2210                 if (ack)
2211                         ieee80211_sta_reset_conn_monitor(sdata);
2212                 else
2213                         sdata->u.mgd.nullfunc_failed = true;
2214                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2215                 return;
2216         }
2217
2218         if (ack)
2219                 ieee80211_sta_reset_conn_monitor(sdata);
2220 }
2221
2222 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2223 {
2224         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2225         const u8 *ssid;
2226         u8 *dst = ifmgd->associated->bssid;
2227         u8 unicast_limit = max(1, max_probe_tries - 3);
2228         struct sta_info *sta;
2229
2230         /*
2231          * Try sending broadcast probe requests for the last three
2232          * probe requests after the first ones failed since some
2233          * buggy APs only support broadcast probe requests.
2234          */
2235         if (ifmgd->probe_send_count >= unicast_limit)
2236                 dst = NULL;
2237
2238         /*
2239          * When the hardware reports an accurate Tx ACK status, it's
2240          * better to send a nullfunc frame instead of a probe request,
2241          * as it will kick us off the AP quickly if we aren't associated
2242          * anymore. The timeout will be reset if the frame is ACKed by
2243          * the AP.
2244          */
2245         ifmgd->probe_send_count++;
2246
2247         if (dst) {
2248                 mutex_lock(&sdata->local->sta_mtx);
2249                 sta = sta_info_get(sdata, dst);
2250                 if (!WARN_ON(!sta))
2251                         ieee80211_check_fast_rx(sta);
2252                 mutex_unlock(&sdata->local->sta_mtx);
2253         }
2254
2255         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2256                 ifmgd->nullfunc_failed = false;
2257                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2258         } else {
2259                 int ssid_len;
2260
2261                 rcu_read_lock();
2262                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2263                 if (WARN_ON_ONCE(ssid == NULL))
2264                         ssid_len = 0;
2265                 else
2266                         ssid_len = ssid[1];
2267
2268                 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2269                                          ssid + 2, ssid_len, NULL,
2270                                          0, (u32) -1, true, 0,
2271                                          ifmgd->associated->channel, false);
2272                 rcu_read_unlock();
2273         }
2274
2275         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2276         run_again(sdata, ifmgd->probe_timeout);
2277 }
2278
2279 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2280                                    bool beacon)
2281 {
2282         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2283         bool already = false;
2284
2285         if (!ieee80211_sdata_running(sdata))
2286                 return;
2287
2288         sdata_lock(sdata);
2289
2290         if (!ifmgd->associated)
2291                 goto out;
2292
2293         mutex_lock(&sdata->local->mtx);
2294
2295         if (sdata->local->tmp_channel || sdata->local->scanning) {
2296                 mutex_unlock(&sdata->local->mtx);
2297                 goto out;
2298         }
2299
2300         if (beacon) {
2301                 mlme_dbg_ratelimited(sdata,
2302                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2303                                      beacon_loss_count);
2304
2305                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2306         }
2307
2308         /*
2309          * The driver/our work has already reported this event or the
2310          * connection monitoring has kicked in and we have already sent
2311          * a probe request. Or maybe the AP died and the driver keeps
2312          * reporting until we disassociate...
2313          *
2314          * In either case we have to ignore the current call to this
2315          * function (except for setting the correct probe reason bit)
2316          * because otherwise we would reset the timer every time and
2317          * never check whether we received a probe response!
2318          */
2319         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2320                 already = true;
2321
2322         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2323
2324         mutex_unlock(&sdata->local->mtx);
2325
2326         if (already)
2327                 goto out;
2328
2329         mutex_lock(&sdata->local->iflist_mtx);
2330         ieee80211_recalc_ps(sdata->local);
2331         mutex_unlock(&sdata->local->iflist_mtx);
2332
2333         ifmgd->probe_send_count = 0;
2334         ieee80211_mgd_probe_ap_send(sdata);
2335  out:
2336         sdata_unlock(sdata);
2337 }
2338
2339 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2340                                           struct ieee80211_vif *vif)
2341 {
2342         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2343         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2344         struct cfg80211_bss *cbss;
2345         struct sk_buff *skb;
2346         const u8 *ssid;
2347         int ssid_len;
2348
2349         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2350                 return NULL;
2351
2352         sdata_assert_lock(sdata);
2353
2354         if (ifmgd->associated)
2355                 cbss = ifmgd->associated;
2356         else if (ifmgd->auth_data)
2357                 cbss = ifmgd->auth_data->bss;
2358         else if (ifmgd->assoc_data)
2359                 cbss = ifmgd->assoc_data->bss;
2360         else
2361                 return NULL;
2362
2363         rcu_read_lock();
2364         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2365         if (WARN_ON_ONCE(ssid == NULL))
2366                 ssid_len = 0;
2367         else
2368                 ssid_len = ssid[1];
2369
2370         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2371                                         (u32) -1, cbss->channel,
2372                                         ssid + 2, ssid_len,
2373                                         NULL, 0, true);
2374         rcu_read_unlock();
2375
2376         return skb;
2377 }
2378 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2379
2380 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2381                                         const u8 *buf, size_t len, bool tx,
2382                                         u16 reason)
2383 {
2384         struct ieee80211_event event = {
2385                 .type = MLME_EVENT,
2386                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2387                 .u.mlme.reason = reason,
2388         };
2389
2390         if (tx)
2391                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2392         else
2393                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2394
2395         drv_event_callback(sdata->local, sdata, &event);
2396 }
2397
2398 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2399 {
2400         struct ieee80211_local *local = sdata->local;
2401         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2402         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2403
2404         sdata_lock(sdata);
2405         if (!ifmgd->associated) {
2406                 sdata_unlock(sdata);
2407                 return;
2408         }
2409
2410         /* AP is probably out of range (or not reachable for another reason) so
2411          * remove the bss struct for that AP.
2412          */
2413         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2414
2415         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2416                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2417                                true, frame_buf);
2418         mutex_lock(&local->mtx);
2419         sdata->vif.csa_active = false;
2420         ifmgd->csa_waiting_bcn = false;
2421         if (sdata->csa_block_tx) {
2422                 ieee80211_wake_vif_queues(local, sdata,
2423                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2424                 sdata->csa_block_tx = false;
2425         }
2426         mutex_unlock(&local->mtx);
2427
2428         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2429                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2430
2431         sdata_unlock(sdata);
2432 }
2433
2434 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2435 {
2436         struct ieee80211_sub_if_data *sdata =
2437                 container_of(work, struct ieee80211_sub_if_data,
2438                              u.mgd.beacon_connection_loss_work);
2439         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2440
2441         if (ifmgd->associated)
2442                 ifmgd->beacon_loss_count++;
2443
2444         if (ifmgd->connection_loss) {
2445                 sdata_info(sdata, "Connection to AP %pM lost\n",
2446                            ifmgd->bssid);
2447                 __ieee80211_disconnect(sdata);
2448         } else {
2449                 ieee80211_mgd_probe_ap(sdata, true);
2450         }
2451 }
2452
2453 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2454 {
2455         struct ieee80211_sub_if_data *sdata =
2456                 container_of(work, struct ieee80211_sub_if_data,
2457                              u.mgd.csa_connection_drop_work);
2458
2459         __ieee80211_disconnect(sdata);
2460 }
2461
2462 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2463 {
2464         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2465         struct ieee80211_hw *hw = &sdata->local->hw;
2466
2467         trace_api_beacon_loss(sdata);
2468
2469         sdata->u.mgd.connection_loss = false;
2470         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2471 }
2472 EXPORT_SYMBOL(ieee80211_beacon_loss);
2473
2474 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2475 {
2476         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2477         struct ieee80211_hw *hw = &sdata->local->hw;
2478
2479         trace_api_connection_loss(sdata);
2480
2481         sdata->u.mgd.connection_loss = true;
2482         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2483 }
2484 EXPORT_SYMBOL(ieee80211_connection_loss);
2485
2486
2487 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2488                                         bool assoc)
2489 {
2490         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2491
2492         sdata_assert_lock(sdata);
2493
2494         if (!assoc) {
2495                 /*
2496                  * we are not authenticated yet, the only timer that could be
2497                  * running is the timeout for the authentication response which
2498                  * which is not relevant anymore.
2499                  */
2500                 del_timer_sync(&sdata->u.mgd.timer);
2501                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2502
2503                 eth_zero_addr(sdata->u.mgd.bssid);
2504                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2505                 sdata->u.mgd.flags = 0;
2506                 mutex_lock(&sdata->local->mtx);
2507                 ieee80211_vif_release_channel(sdata);
2508                 mutex_unlock(&sdata->local->mtx);
2509         }
2510
2511         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2512         kfree(auth_data);
2513         sdata->u.mgd.auth_data = NULL;
2514 }
2515
2516 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2517                                          bool assoc, bool abandon)
2518 {
2519         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2520
2521         sdata_assert_lock(sdata);
2522
2523         if (!assoc) {
2524                 /*
2525                  * we are not associated yet, the only timer that could be
2526                  * running is the timeout for the association response which
2527                  * which is not relevant anymore.
2528                  */
2529                 del_timer_sync(&sdata->u.mgd.timer);
2530                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2531
2532                 eth_zero_addr(sdata->u.mgd.bssid);
2533                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2534                 sdata->u.mgd.flags = 0;
2535                 sdata->vif.mu_mimo_owner = false;
2536
2537                 mutex_lock(&sdata->local->mtx);
2538                 ieee80211_vif_release_channel(sdata);
2539                 mutex_unlock(&sdata->local->mtx);
2540
2541                 if (abandon)
2542                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2543         }
2544
2545         kfree(assoc_data);
2546         sdata->u.mgd.assoc_data = NULL;
2547 }
2548
2549 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2550                                      struct ieee80211_mgmt *mgmt, size_t len)
2551 {
2552         struct ieee80211_local *local = sdata->local;
2553         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2554         u8 *pos;
2555         struct ieee802_11_elems elems;
2556         u32 tx_flags = 0;
2557
2558         pos = mgmt->u.auth.variable;
2559         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2560         if (!elems.challenge)
2561                 return;
2562         auth_data->expected_transaction = 4;
2563         drv_mgd_prepare_tx(sdata->local, sdata);
2564         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2565                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2566                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2567         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2568                             elems.challenge - 2, elems.challenge_len + 2,
2569                             auth_data->bss->bssid, auth_data->bss->bssid,
2570                             auth_data->key, auth_data->key_len,
2571                             auth_data->key_idx, tx_flags);
2572 }
2573
2574 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2575                                    struct ieee80211_mgmt *mgmt, size_t len)
2576 {
2577         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2578         u8 bssid[ETH_ALEN];
2579         u16 auth_alg, auth_transaction, status_code;
2580         struct sta_info *sta;
2581         struct ieee80211_event event = {
2582                 .type = MLME_EVENT,
2583                 .u.mlme.data = AUTH_EVENT,
2584         };
2585
2586         sdata_assert_lock(sdata);
2587
2588         if (len < 24 + 6)
2589                 return;
2590
2591         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2592                 return;
2593
2594         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2595
2596         if (!ether_addr_equal(bssid, mgmt->bssid))
2597                 return;
2598
2599         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2600         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2601         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2602
2603         if (auth_alg != ifmgd->auth_data->algorithm ||
2604             auth_transaction != ifmgd->auth_data->expected_transaction) {
2605                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2606                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2607                            auth_transaction,
2608                            ifmgd->auth_data->expected_transaction);
2609                 return;
2610         }
2611
2612         if (status_code != WLAN_STATUS_SUCCESS) {
2613                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2614                            mgmt->sa, status_code);
2615                 ieee80211_destroy_auth_data(sdata, false);
2616                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2617                 event.u.mlme.status = MLME_DENIED;
2618                 event.u.mlme.reason = status_code;
2619                 drv_event_callback(sdata->local, sdata, &event);
2620                 return;
2621         }
2622
2623         switch (ifmgd->auth_data->algorithm) {
2624         case WLAN_AUTH_OPEN:
2625         case WLAN_AUTH_LEAP:
2626         case WLAN_AUTH_FT:
2627         case WLAN_AUTH_SAE:
2628         case WLAN_AUTH_FILS_SK:
2629         case WLAN_AUTH_FILS_SK_PFS:
2630         case WLAN_AUTH_FILS_PK:
2631                 break;
2632         case WLAN_AUTH_SHARED_KEY:
2633                 if (ifmgd->auth_data->expected_transaction != 4) {
2634                         ieee80211_auth_challenge(sdata, mgmt, len);
2635                         /* need another frame */
2636                         return;
2637                 }
2638                 break;
2639         default:
2640                 WARN_ONCE(1, "invalid auth alg %d",
2641                           ifmgd->auth_data->algorithm);
2642                 return;
2643         }
2644
2645         event.u.mlme.status = MLME_SUCCESS;
2646         drv_event_callback(sdata->local, sdata, &event);
2647         sdata_info(sdata, "authenticated\n");
2648         ifmgd->auth_data->done = true;
2649         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2650         ifmgd->auth_data->timeout_started = true;
2651         run_again(sdata, ifmgd->auth_data->timeout);
2652
2653         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2654             ifmgd->auth_data->expected_transaction != 2) {
2655                 /*
2656                  * Report auth frame to user space for processing since another
2657                  * round of Authentication frames is still needed.
2658                  */
2659                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2660                 return;
2661         }
2662
2663         /* move station state to auth */
2664         mutex_lock(&sdata->local->sta_mtx);
2665         sta = sta_info_get(sdata, bssid);
2666         if (!sta) {
2667                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2668                 goto out_err;
2669         }
2670         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2671                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2672                 goto out_err;
2673         }
2674         mutex_unlock(&sdata->local->sta_mtx);
2675
2676         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2677         return;
2678  out_err:
2679         mutex_unlock(&sdata->local->sta_mtx);
2680         /* ignore frame -- wait for timeout */
2681 }
2682
2683 #define case_WLAN(type) \
2684         case WLAN_REASON_##type: return #type
2685
2686 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2687 {
2688         switch (reason_code) {
2689         case_WLAN(UNSPECIFIED);
2690         case_WLAN(PREV_AUTH_NOT_VALID);
2691         case_WLAN(DEAUTH_LEAVING);
2692         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2693         case_WLAN(DISASSOC_AP_BUSY);
2694         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2695         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2696         case_WLAN(DISASSOC_STA_HAS_LEFT);
2697         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2698         case_WLAN(DISASSOC_BAD_POWER);
2699         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2700         case_WLAN(INVALID_IE);
2701         case_WLAN(MIC_FAILURE);
2702         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2703         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2704         case_WLAN(IE_DIFFERENT);
2705         case_WLAN(INVALID_GROUP_CIPHER);
2706         case_WLAN(INVALID_PAIRWISE_CIPHER);
2707         case_WLAN(INVALID_AKMP);
2708         case_WLAN(UNSUPP_RSN_VERSION);
2709         case_WLAN(INVALID_RSN_IE_CAP);
2710         case_WLAN(IEEE8021X_FAILED);
2711         case_WLAN(CIPHER_SUITE_REJECTED);
2712         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2713         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2714         case_WLAN(DISASSOC_LOW_ACK);
2715         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2716         case_WLAN(QSTA_LEAVE_QBSS);
2717         case_WLAN(QSTA_NOT_USE);
2718         case_WLAN(QSTA_REQUIRE_SETUP);
2719         case_WLAN(QSTA_TIMEOUT);
2720         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2721         case_WLAN(MESH_PEER_CANCELED);
2722         case_WLAN(MESH_MAX_PEERS);
2723         case_WLAN(MESH_CONFIG);
2724         case_WLAN(MESH_CLOSE);
2725         case_WLAN(MESH_MAX_RETRIES);
2726         case_WLAN(MESH_CONFIRM_TIMEOUT);
2727         case_WLAN(MESH_INVALID_GTK);
2728         case_WLAN(MESH_INCONSISTENT_PARAM);
2729         case_WLAN(MESH_INVALID_SECURITY);
2730         case_WLAN(MESH_PATH_ERROR);
2731         case_WLAN(MESH_PATH_NOFORWARD);
2732         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2733         case_WLAN(MAC_EXISTS_IN_MBSS);
2734         case_WLAN(MESH_CHAN_REGULATORY);
2735         case_WLAN(MESH_CHAN);
2736         default: return "<unknown>";
2737         }
2738 }
2739
2740 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2741                                      struct ieee80211_mgmt *mgmt, size_t len)
2742 {
2743         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2744         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2745
2746         sdata_assert_lock(sdata);
2747
2748         if (len < 24 + 2)
2749                 return;
2750
2751         if (ifmgd->associated &&
2752             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2753                 const u8 *bssid = ifmgd->associated->bssid;
2754
2755                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2756                            bssid, reason_code,
2757                            ieee80211_get_reason_code_string(reason_code));
2758
2759                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2760
2761                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2762                                             reason_code);
2763                 return;
2764         }
2765
2766         if (ifmgd->assoc_data &&
2767             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2768                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2769
2770                 sdata_info(sdata,
2771                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2772                            bssid, reason_code,
2773                            ieee80211_get_reason_code_string(reason_code));
2774
2775                 ieee80211_destroy_assoc_data(sdata, false, true);
2776
2777                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2778                 return;
2779         }
2780 }
2781
2782
2783 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2784                                        struct ieee80211_mgmt *mgmt, size_t len)
2785 {
2786         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2787         u16 reason_code;
2788
2789         sdata_assert_lock(sdata);
2790
2791         if (len < 24 + 2)
2792                 return;
2793
2794         if (!ifmgd->associated ||
2795             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2796                 return;
2797
2798         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2799
2800         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2801                    mgmt->sa, reason_code,
2802                    ieee80211_get_reason_code_string(reason_code));
2803
2804         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2805
2806         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2807 }
2808
2809 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2810                                 u8 *supp_rates, unsigned int supp_rates_len,
2811                                 u32 *rates, u32 *basic_rates,
2812                                 bool *have_higher_than_11mbit,
2813                                 int *min_rate, int *min_rate_index,
2814                                 int shift)
2815 {
2816         int i, j;
2817
2818         for (i = 0; i < supp_rates_len; i++) {
2819                 int rate = supp_rates[i] & 0x7f;
2820                 bool is_basic = !!(supp_rates[i] & 0x80);
2821
2822                 if ((rate * 5 * (1 << shift)) > 110)
2823                         *have_higher_than_11mbit = true;
2824
2825                 /*
2826                  * Skip HT and VHT BSS membership selectors since they're not
2827                  * rates.
2828                  *
2829                  * Note: Even though the membership selector and the basic
2830                  *       rate flag share the same bit, they are not exactly
2831                  *       the same.
2832                  */
2833                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
2834                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
2835                         continue;
2836
2837                 for (j = 0; j < sband->n_bitrates; j++) {
2838                         struct ieee80211_rate *br;
2839                         int brate;
2840
2841                         br = &sband->bitrates[j];
2842
2843                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2844                         if (brate == rate) {
2845                                 *rates |= BIT(j);
2846                                 if (is_basic)
2847                                         *basic_rates |= BIT(j);
2848                                 if ((rate * 5) < *min_rate) {
2849                                         *min_rate = rate * 5;
2850                                         *min_rate_index = j;
2851                                 }
2852                                 break;
2853                         }
2854                 }
2855         }
2856 }
2857
2858 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2859                                     struct cfg80211_bss *cbss,
2860                                     struct ieee80211_mgmt *mgmt, size_t len)
2861 {
2862         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2863         struct ieee80211_local *local = sdata->local;
2864         struct ieee80211_supported_band *sband;
2865         struct sta_info *sta;
2866         u8 *pos;
2867         u16 capab_info, aid;
2868         struct ieee802_11_elems elems;
2869         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2870         const struct cfg80211_bss_ies *bss_ies = NULL;
2871         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2872         u32 changed = 0;
2873         int err;
2874         bool ret;
2875
2876         /* AssocResp and ReassocResp have identical structure */
2877
2878         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2879         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2880
2881         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2882                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2883                            aid);
2884         aid &= ~(BIT(15) | BIT(14));
2885
2886         ifmgd->broken_ap = false;
2887
2888         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2889                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2890                            aid);
2891                 aid = 0;
2892                 ifmgd->broken_ap = true;
2893         }
2894
2895         pos = mgmt->u.assoc_resp.variable;
2896         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2897
2898         if (!elems.supp_rates) {
2899                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2900                 return false;
2901         }
2902
2903         ifmgd->aid = aid;
2904         ifmgd->tdls_chan_switch_prohibited =
2905                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2906                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2907
2908         /*
2909          * Some APs are erroneously not including some information in their
2910          * (re)association response frames. Try to recover by using the data
2911          * from the beacon or probe response. This seems to afflict mobile
2912          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2913          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2914          */
2915         if ((assoc_data->wmm && !elems.wmm_param) ||
2916             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2917              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2918             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2919              (!elems.vht_cap_elem || !elems.vht_operation))) {
2920                 const struct cfg80211_bss_ies *ies;
2921                 struct ieee802_11_elems bss_elems;
2922
2923                 rcu_read_lock();
2924                 ies = rcu_dereference(cbss->ies);
2925                 if (ies)
2926                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2927                                           GFP_ATOMIC);
2928                 rcu_read_unlock();
2929                 if (!bss_ies)
2930                         return false;
2931
2932                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2933                                        false, &bss_elems);
2934                 if (assoc_data->wmm &&
2935                     !elems.wmm_param && bss_elems.wmm_param) {
2936                         elems.wmm_param = bss_elems.wmm_param;
2937                         sdata_info(sdata,
2938                                    "AP bug: WMM param missing from AssocResp\n");
2939                 }
2940
2941                 /*
2942                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2943                  * have to include the IEs in the (re)association response.
2944                  */
2945                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2946                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2947                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2948                         sdata_info(sdata,
2949                                    "AP bug: HT capability missing from AssocResp\n");
2950                 }
2951                 if (!elems.ht_operation && bss_elems.ht_operation &&
2952                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2953                         elems.ht_operation = bss_elems.ht_operation;
2954                         sdata_info(sdata,
2955                                    "AP bug: HT operation missing from AssocResp\n");
2956                 }
2957                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2958                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2959                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2960                         sdata_info(sdata,
2961                                    "AP bug: VHT capa missing from AssocResp\n");
2962                 }
2963                 if (!elems.vht_operation && bss_elems.vht_operation &&
2964                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2965                         elems.vht_operation = bss_elems.vht_operation;
2966                         sdata_info(sdata,
2967                                    "AP bug: VHT operation missing from AssocResp\n");
2968                 }
2969         }
2970
2971         /*
2972          * We previously checked these in the beacon/probe response, so
2973          * they should be present here. This is just a safety net.
2974          */
2975         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2976             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2977                 sdata_info(sdata,
2978                            "HT AP is missing WMM params or HT capability/operation\n");
2979                 ret = false;
2980                 goto out;
2981         }
2982
2983         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2984             (!elems.vht_cap_elem || !elems.vht_operation)) {
2985                 sdata_info(sdata,
2986                            "VHT AP is missing VHT capability/operation\n");
2987                 ret = false;
2988                 goto out;
2989         }
2990
2991         mutex_lock(&sdata->local->sta_mtx);
2992         /*
2993          * station info was already allocated and inserted before
2994          * the association and should be available to us
2995          */
2996         sta = sta_info_get(sdata, cbss->bssid);
2997         if (WARN_ON(!sta)) {
2998                 mutex_unlock(&sdata->local->sta_mtx);
2999                 ret = false;
3000                 goto out;
3001         }
3002
3003         sband = ieee80211_get_sband(sdata);
3004         if (!sband) {
3005                 mutex_unlock(&sdata->local->sta_mtx);
3006                 ret = false;
3007                 goto out;
3008         }
3009
3010         /* Set up internal HT/VHT capabilities */
3011         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3012                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3013                                                   elems.ht_cap_elem, sta);
3014
3015         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3016                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3017                                                     elems.vht_cap_elem, sta);
3018
3019         /*
3020          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3021          * in their association response, so ignore that data for our own
3022          * configuration. If it changed since the last beacon, we'll get the
3023          * next beacon and update then.
3024          */
3025
3026         /*
3027          * If an operating mode notification IE is present, override the
3028          * NSS calculation (that would be done in rate_control_rate_init())
3029          * and use the # of streams from that element.
3030          */
3031         if (elems.opmode_notif &&
3032             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3033                 u8 nss;
3034
3035                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3036                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3037                 nss += 1;
3038                 sta->sta.rx_nss = nss;
3039         }
3040
3041         rate_control_rate_init(sta);
3042
3043         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3044                 set_sta_flag(sta, WLAN_STA_MFP);
3045                 sta->sta.mfp = true;
3046         } else {
3047                 sta->sta.mfp = false;
3048         }
3049
3050         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3051
3052         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3053         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3054                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3055         if (err) {
3056                 sdata_info(sdata,
3057                            "failed to move station %pM to desired state\n",
3058                            sta->sta.addr);
3059                 WARN_ON(__sta_info_destroy(sta));
3060                 mutex_unlock(&sdata->local->sta_mtx);
3061                 ret = false;
3062                 goto out;
3063         }
3064
3065         mutex_unlock(&sdata->local->sta_mtx);
3066
3067         /*
3068          * Always handle WMM once after association regardless
3069          * of the first value the AP uses. Setting -1 here has
3070          * that effect because the AP values is an unsigned
3071          * 4-bit value.
3072          */
3073         ifmgd->wmm_last_param_set = -1;
3074
3075         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3076                 ieee80211_set_wmm_default(sdata, false, false);
3077         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3078                                              elems.wmm_param_len)) {
3079                 /* still enable QoS since we might have HT/VHT */
3080                 ieee80211_set_wmm_default(sdata, false, true);
3081                 /* set the disable-WMM flag in this case to disable
3082                  * tracking WMM parameter changes in the beacon if
3083                  * the parameters weren't actually valid. Doing so
3084                  * avoids changing parameters very strangely when
3085                  * the AP is going back and forth between valid and
3086                  * invalid parameters.
3087                  */
3088                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3089         }
3090         changed |= BSS_CHANGED_QOS;
3091
3092         if (elems.max_idle_period_ie) {
3093                 bss_conf->max_idle_period =
3094                         le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3095                 bss_conf->protected_keep_alive =
3096                         !!(elems.max_idle_period_ie->idle_options &
3097                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3098                 changed |= BSS_CHANGED_KEEP_ALIVE;
3099         } else {
3100                 bss_conf->max_idle_period = 0;
3101                 bss_conf->protected_keep_alive = false;
3102         }
3103
3104         /* set AID and assoc capability,
3105          * ieee80211_set_associated() will tell the driver */
3106         bss_conf->aid = aid;
3107         bss_conf->assoc_capability = capab_info;
3108         ieee80211_set_associated(sdata, cbss, changed);
3109
3110         /*
3111          * If we're using 4-addr mode, let the AP know that we're
3112          * doing so, so that it can create the STA VLAN on its side
3113          */
3114         if (ifmgd->use_4addr)
3115                 ieee80211_send_4addr_nullfunc(local, sdata);
3116
3117         /*
3118          * Start timer to probe the connection to the AP now.
3119          * Also start the timer that will detect beacon loss.
3120          */
3121         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3122         ieee80211_sta_reset_beacon_monitor(sdata);
3123
3124         ret = true;
3125  out:
3126         kfree(bss_ies);
3127         return ret;
3128 }
3129
3130 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3131                                          struct ieee80211_mgmt *mgmt,
3132                                          size_t len)
3133 {
3134         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3135         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3136         u16 capab_info, status_code, aid;
3137         struct ieee802_11_elems elems;
3138         int ac, uapsd_queues = -1;
3139         u8 *pos;
3140         bool reassoc;
3141         struct cfg80211_bss *bss;
3142         struct ieee80211_event event = {
3143                 .type = MLME_EVENT,
3144                 .u.mlme.data = ASSOC_EVENT,
3145         };
3146
3147         sdata_assert_lock(sdata);
3148
3149         if (!assoc_data)
3150                 return;
3151         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3152                 return;
3153
3154         /*
3155          * AssocResp and ReassocResp have identical structure, so process both
3156          * of them in this function.
3157          */
3158
3159         if (len < 24 + 6)
3160                 return;
3161
3162         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3163         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3164         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3165         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3166
3167         sdata_info(sdata,
3168                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3169                    reassoc ? "Rea" : "A", mgmt->sa,
3170                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3171
3172         if (assoc_data->fils_kek_len &&
3173             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3174                 return;
3175
3176         pos = mgmt->u.assoc_resp.variable;
3177         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3178
3179         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3180             elems.timeout_int &&
3181             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3182                 u32 tu, ms;
3183                 tu = le32_to_cpu(elems.timeout_int->value);
3184                 ms = tu * 1024 / 1000;
3185                 sdata_info(sdata,
3186                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3187                            mgmt->sa, tu, ms);
3188                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3189                 assoc_data->timeout_started = true;
3190                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3191                         run_again(sdata, assoc_data->timeout);
3192                 return;
3193         }
3194
3195         bss = assoc_data->bss;
3196
3197         if (status_code != WLAN_STATUS_SUCCESS) {
3198                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3199                            mgmt->sa, status_code);
3200                 ieee80211_destroy_assoc_data(sdata, false, false);
3201                 event.u.mlme.status = MLME_DENIED;
3202                 event.u.mlme.reason = status_code;
3203                 drv_event_callback(sdata->local, sdata, &event);
3204         } else {
3205                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3206                         /* oops -- internal error -- send timeout for now */
3207                         ieee80211_destroy_assoc_data(sdata, false, false);
3208                         cfg80211_assoc_timeout(sdata->dev, bss);
3209                         return;
3210                 }
3211                 event.u.mlme.status = MLME_SUCCESS;
3212                 drv_event_callback(sdata->local, sdata, &event);
3213                 sdata_info(sdata, "associated\n");
3214
3215                 /*
3216                  * destroy assoc_data afterwards, as otherwise an idle
3217                  * recalc after assoc_data is NULL but before associated
3218                  * is set can cause the interface to go idle
3219                  */
3220                 ieee80211_destroy_assoc_data(sdata, true, false);
3221
3222                 /* get uapsd queues configuration */
3223                 uapsd_queues = 0;
3224                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3225                         if (sdata->tx_conf[ac].uapsd)
3226                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3227         }
3228
3229         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3230 }
3231
3232 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3233                                   struct ieee80211_mgmt *mgmt, size_t len,
3234                                   struct ieee80211_rx_status *rx_status,
3235                                   struct ieee802_11_elems *elems)
3236 {
3237         struct ieee80211_local *local = sdata->local;
3238         struct ieee80211_bss *bss;
3239         struct ieee80211_channel *channel;
3240
3241         sdata_assert_lock(sdata);
3242
3243         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3244         if (!channel)
3245                 return;
3246
3247         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3248                                         channel);
3249         if (bss) {
3250                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3251                 ieee80211_rx_bss_put(local, bss);
3252         }
3253 }
3254
3255
3256 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3257                                          struct sk_buff *skb)
3258 {
3259         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3260         struct ieee80211_if_managed *ifmgd;
3261         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3262         size_t baselen, len = skb->len;
3263         struct ieee802_11_elems elems;
3264
3265         ifmgd = &sdata->u.mgd;
3266
3267         sdata_assert_lock(sdata);
3268
3269         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3270                 return; /* ignore ProbeResp to foreign address */
3271
3272         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3273         if (baselen > len)
3274                 return;
3275
3276         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3277                                false, &elems);
3278
3279         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3280
3281         if (ifmgd->associated &&
3282             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3283                 ieee80211_reset_ap_probe(sdata);
3284 }
3285
3286 /*
3287  * This is the canonical list of information elements we care about,
3288  * the filter code also gives us all changes to the Microsoft OUI
3289  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3290  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3291  * changes to requested client power.
3292  *
3293  * We implement beacon filtering in software since that means we can
3294  * avoid processing the frame here and in cfg80211, and userspace
3295  * will not be able to tell whether the hardware supports it or not.
3296  *
3297  * XXX: This list needs to be dynamic -- userspace needs to be able to
3298  *      add items it requires. It also needs to be able to tell us to
3299  *      look out for other vendor IEs.
3300  */
3301 static const u64 care_about_ies =
3302         (1ULL << WLAN_EID_COUNTRY) |
3303         (1ULL << WLAN_EID_ERP_INFO) |
3304         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3305         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3306         (1ULL << WLAN_EID_HT_CAPABILITY) |
3307         (1ULL << WLAN_EID_HT_OPERATION) |
3308         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3309
3310 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3311                                      struct ieee80211_mgmt *mgmt, size_t len,
3312                                      struct ieee80211_rx_status *rx_status)
3313 {
3314         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3315         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3316         size_t baselen;
3317         struct ieee802_11_elems elems;
3318         struct ieee80211_local *local = sdata->local;
3319         struct ieee80211_chanctx_conf *chanctx_conf;
3320         struct ieee80211_channel *chan;
3321         struct sta_info *sta;
3322         u32 changed = 0;
3323         bool erp_valid;
3324         u8 erp_value = 0;
3325         u32 ncrc;
3326         u8 *bssid;
3327         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3328
3329         sdata_assert_lock(sdata);
3330
3331         /* Process beacon from the current BSS */
3332         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3333         if (baselen > len)
3334                 return;
3335
3336         rcu_read_lock();
3337         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3338         if (!chanctx_conf) {
3339                 rcu_read_unlock();
3340                 return;
3341         }
3342
3343         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3344                 rcu_read_unlock();
3345                 return;
3346         }
3347         chan = chanctx_conf->def.chan;
3348         rcu_read_unlock();
3349
3350         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3351             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3352                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3353                                        len - baselen, false, &elems);
3354
3355                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3356                 if (elems.tim && !elems.parse_error) {
3357                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3358                         ifmgd->dtim_period = tim_ie->dtim_period;
3359                 }
3360                 ifmgd->have_beacon = true;
3361                 ifmgd->assoc_data->need_beacon = false;
3362                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3363                         sdata->vif.bss_conf.sync_tsf =
3364                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3365                         sdata->vif.bss_conf.sync_device_ts =
3366                                 rx_status->device_timestamp;
3367                         if (elems.tim)
3368                                 sdata->vif.bss_conf.sync_dtim_count =
3369                                         elems.tim->dtim_count;
3370                         else
3371                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3372                 }
3373                 /* continue assoc process */
3374                 ifmgd->assoc_data->timeout = jiffies;
3375                 ifmgd->assoc_data->timeout_started = true;
3376                 run_again(sdata, ifmgd->assoc_data->timeout);
3377                 return;
3378         }
3379
3380         if (!ifmgd->associated ||
3381             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3382                 return;
3383         bssid = ifmgd->associated->bssid;
3384
3385         /* Track average RSSI from the Beacon frames of the current AP */
3386         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3387                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3388                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3389                 ifmgd->last_cqm_event_signal = 0;
3390                 ifmgd->count_beacon_signal = 1;
3391                 ifmgd->last_ave_beacon_signal = 0;
3392         } else {
3393                 ifmgd->count_beacon_signal++;
3394         }
3395
3396         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3397
3398         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3399             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3400                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3401                 int last_sig = ifmgd->last_ave_beacon_signal;
3402                 struct ieee80211_event event = {
3403                         .type = RSSI_EVENT,
3404                 };
3405
3406                 /*
3407                  * if signal crosses either of the boundaries, invoke callback
3408                  * with appropriate parameters
3409                  */
3410                 if (sig > ifmgd->rssi_max_thold &&
3411                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3412                         ifmgd->last_ave_beacon_signal = sig;
3413                         event.u.rssi.data = RSSI_EVENT_HIGH;
3414                         drv_event_callback(local, sdata, &event);
3415                 } else if (sig < ifmgd->rssi_min_thold &&
3416                            (last_sig >= ifmgd->rssi_max_thold ||
3417                            last_sig == 0)) {
3418                         ifmgd->last_ave_beacon_signal = sig;
3419                         event.u.rssi.data = RSSI_EVENT_LOW;
3420                         drv_event_callback(local, sdata, &event);
3421                 }
3422         }
3423
3424         if (bss_conf->cqm_rssi_thold &&
3425             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3426             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3427                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3428                 int last_event = ifmgd->last_cqm_event_signal;
3429                 int thold = bss_conf->cqm_rssi_thold;
3430                 int hyst = bss_conf->cqm_rssi_hyst;
3431
3432                 if (sig < thold &&
3433                     (last_event == 0 || sig < last_event - hyst)) {
3434                         ifmgd->last_cqm_event_signal = sig;
3435                         ieee80211_cqm_rssi_notify(
3436                                 &sdata->vif,
3437                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3438                                 sig, GFP_KERNEL);
3439                 } else if (sig > thold &&
3440                            (last_event == 0 || sig > last_event + hyst)) {
3441                         ifmgd->last_cqm_event_signal = sig;
3442                         ieee80211_cqm_rssi_notify(
3443                                 &sdata->vif,
3444                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3445                                 sig, GFP_KERNEL);
3446                 }
3447         }
3448
3449         if (bss_conf->cqm_rssi_low &&
3450             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3451                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3452                 int last_event = ifmgd->last_cqm_event_signal;
3453                 int low = bss_conf->cqm_rssi_low;
3454                 int high = bss_conf->cqm_rssi_high;
3455
3456                 if (sig < low &&
3457                     (last_event == 0 || last_event >= low)) {
3458                         ifmgd->last_cqm_event_signal = sig;
3459                         ieee80211_cqm_rssi_notify(
3460                                 &sdata->vif,
3461                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3462                                 sig, GFP_KERNEL);
3463                 } else if (sig > high &&
3464                            (last_event == 0 || last_event <= high)) {
3465                         ifmgd->last_cqm_event_signal = sig;
3466                         ieee80211_cqm_rssi_notify(
3467                                 &sdata->vif,
3468                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3469                                 sig, GFP_KERNEL);
3470                 }
3471         }
3472
3473         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3474                 mlme_dbg_ratelimited(sdata,
3475                                      "cancelling AP probe due to a received beacon\n");
3476                 ieee80211_reset_ap_probe(sdata);
3477         }
3478
3479         /*
3480          * Push the beacon loss detection into the future since
3481          * we are processing a beacon from the AP just now.
3482          */
3483         ieee80211_sta_reset_beacon_monitor(sdata);
3484
3485         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3486         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3487                                           len - baselen, false, &elems,
3488                                           care_about_ies, ncrc);
3489
3490         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3491             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3492                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3493                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3494                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3495                                 ieee80211_hw_config(local,
3496                                                     IEEE80211_CONF_CHANGE_PS);
3497                         }
3498                         ieee80211_send_nullfunc(local, sdata, false);
3499                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3500                         local->pspolling = true;
3501
3502                         /*
3503                          * Here is assumed that the driver will be
3504                          * able to send ps-poll frame and receive a
3505                          * response even though power save mode is
3506                          * enabled, but some drivers might require
3507                          * to disable power save here. This needs
3508                          * to be investigated.
3509                          */
3510                         ieee80211_send_pspoll(local, sdata);
3511                 }
3512         }
3513
3514         if (sdata->vif.p2p ||
3515             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3516                 struct ieee80211_p2p_noa_attr noa = {};
3517                 int ret;
3518
3519                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3520                                             len - baselen,
3521                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3522                                             (u8 *) &noa, sizeof(noa));
3523                 if (ret >= 2) {
3524                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3525                                 /* valid noa_attr and index changed */
3526                                 sdata->u.mgd.p2p_noa_index = noa.index;
3527                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3528                                 changed |= BSS_CHANGED_P2P_PS;
3529                                 /*
3530                                  * make sure we update all information, the CRC
3531                                  * mechanism doesn't look at P2P attributes.
3532                                  */
3533                                 ifmgd->beacon_crc_valid = false;
3534                         }
3535                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3536                         /* noa_attr not found and we had valid noa_attr before */
3537                         sdata->u.mgd.p2p_noa_index = -1;
3538                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3539                         changed |= BSS_CHANGED_P2P_PS;
3540                         ifmgd->beacon_crc_valid = false;
3541                 }
3542         }
3543
3544         if (ifmgd->csa_waiting_bcn)
3545                 ieee80211_chswitch_post_beacon(sdata);
3546
3547         /*
3548          * Update beacon timing and dtim count on every beacon appearance. This
3549          * will allow the driver to use the most updated values. Do it before
3550          * comparing this one with last received beacon.
3551          * IMPORTANT: These parameters would possibly be out of sync by the time
3552          * the driver will use them. The synchronized view is currently
3553          * guaranteed only in certain callbacks.
3554          */
3555         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3556                 sdata->vif.bss_conf.sync_tsf =
3557                         le64_to_cpu(mgmt->u.beacon.timestamp);
3558                 sdata->vif.bss_conf.sync_device_ts =
3559                         rx_status->device_timestamp;
3560                 if (elems.tim)
3561                         sdata->vif.bss_conf.sync_dtim_count =
3562                                 elems.tim->dtim_count;
3563                 else
3564                         sdata->vif.bss_conf.sync_dtim_count = 0;
3565         }
3566
3567         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3568                 return;
3569         ifmgd->beacon_crc = ncrc;
3570         ifmgd->beacon_crc_valid = true;
3571
3572         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3573
3574         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3575                                          rx_status->device_timestamp,
3576                                          &elems, true);
3577
3578         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3579             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3580                                      elems.wmm_param_len))
3581                 changed |= BSS_CHANGED_QOS;
3582
3583         /*
3584          * If we haven't had a beacon before, tell the driver about the
3585          * DTIM period (and beacon timing if desired) now.
3586          */
3587         if (!ifmgd->have_beacon) {
3588                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3589                 if (elems.tim)
3590                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3591                 else
3592                         bss_conf->dtim_period = 1;
3593
3594                 changed |= BSS_CHANGED_BEACON_INFO;
3595                 ifmgd->have_beacon = true;
3596
3597                 mutex_lock(&local->iflist_mtx);
3598                 ieee80211_recalc_ps(local);
3599                 mutex_unlock(&local->iflist_mtx);
3600
3601                 ieee80211_recalc_ps_vif(sdata);
3602         }
3603
3604         if (elems.erp_info) {
3605                 erp_valid = true;
3606                 erp_value = elems.erp_info[0];
3607         } else {
3608                 erp_valid = false;
3609         }
3610         changed |= ieee80211_handle_bss_capability(sdata,
3611                         le16_to_cpu(mgmt->u.beacon.capab_info),
3612                         erp_valid, erp_value);
3613
3614         mutex_lock(&local->sta_mtx);
3615         sta = sta_info_get(sdata, bssid);
3616
3617         if (ieee80211_config_bw(sdata, sta,
3618                                 elems.ht_cap_elem, elems.ht_operation,
3619                                 elems.vht_operation, bssid, &changed)) {
3620                 mutex_unlock(&local->sta_mtx);
3621                 sdata_info(sdata,
3622                            "failed to follow AP %pM bandwidth change, disconnect\n",
3623                            bssid);
3624                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3625                                        WLAN_REASON_DEAUTH_LEAVING,
3626                                        true, deauth_buf);
3627                 ieee80211_report_disconnect(sdata, deauth_buf,
3628                                             sizeof(deauth_buf), true,
3629                                             WLAN_REASON_DEAUTH_LEAVING);
3630                 return;
3631         }
3632
3633         if (sta && elems.opmode_notif)
3634                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3635                                             rx_status->band);
3636         mutex_unlock(&local->sta_mtx);
3637
3638         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3639                                                elems.country_elem,
3640                                                elems.country_elem_len,
3641                                                elems.pwr_constr_elem,
3642                                                elems.cisco_dtpc_elem);
3643
3644         ieee80211_bss_info_change_notify(sdata, changed);
3645 }
3646
3647 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3648                                   struct sk_buff *skb)
3649 {
3650         struct ieee80211_rx_status *rx_status;
3651         struct ieee80211_mgmt *mgmt;
3652         u16 fc;
3653         struct ieee802_11_elems elems;
3654         int ies_len;
3655
3656         rx_status = (struct ieee80211_rx_status *) skb->cb;
3657         mgmt = (struct ieee80211_mgmt *) skb->data;
3658         fc = le16_to_cpu(mgmt->frame_control);
3659
3660         sdata_lock(sdata);
3661
3662         switch (fc & IEEE80211_FCTL_STYPE) {
3663         case IEEE80211_STYPE_BEACON:
3664                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3665                 break;
3666         case IEEE80211_STYPE_PROBE_RESP:
3667                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3668                 break;
3669         case IEEE80211_STYPE_AUTH:
3670                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3671                 break;
3672         case IEEE80211_STYPE_DEAUTH:
3673                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3674                 break;
3675         case IEEE80211_STYPE_DISASSOC:
3676                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3677                 break;
3678         case IEEE80211_STYPE_ASSOC_RESP:
3679         case IEEE80211_STYPE_REASSOC_RESP:
3680                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3681                 break;
3682         case IEEE80211_STYPE_ACTION:
3683                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3684                         ies_len = skb->len -
3685                                   offsetof(struct ieee80211_mgmt,
3686                                            u.action.u.chan_switch.variable);
3687
3688                         if (ies_len < 0)
3689                                 break;
3690
3691                         ieee802_11_parse_elems(
3692                                 mgmt->u.action.u.chan_switch.variable,
3693                                 ies_len, true, &elems);
3694
3695                         if (elems.parse_error)
3696                                 break;
3697
3698                         ieee80211_sta_process_chanswitch(sdata,
3699                                                  rx_status->mactime,
3700                                                  rx_status->device_timestamp,
3701                                                  &elems, false);
3702                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3703                         ies_len = skb->len -
3704                                   offsetof(struct ieee80211_mgmt,
3705                                            u.action.u.ext_chan_switch.variable);
3706
3707                         if (ies_len < 0)
3708                                 break;
3709
3710                         ieee802_11_parse_elems(
3711                                 mgmt->u.action.u.ext_chan_switch.variable,
3712                                 ies_len, true, &elems);
3713
3714                         if (elems.parse_error)
3715                                 break;
3716
3717                         /* for the handling code pretend this was also an IE */
3718                         elems.ext_chansw_ie =
3719                                 &mgmt->u.action.u.ext_chan_switch.data;
3720
3721                         ieee80211_sta_process_chanswitch(sdata,
3722                                                  rx_status->mactime,
3723                                                  rx_status->device_timestamp,
3724                                                  &elems, false);
3725                 }
3726                 break;
3727         }
3728         sdata_unlock(sdata);
3729 }
3730
3731 static void ieee80211_sta_timer(unsigned long data)
3732 {
3733         struct ieee80211_sub_if_data *sdata =
3734                 (struct ieee80211_sub_if_data *) data;
3735
3736         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3737 }
3738
3739 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3740                                           u8 *bssid, u8 reason, bool tx)
3741 {
3742         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3743
3744         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3745                                tx, frame_buf);
3746
3747         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3748                                     reason);
3749 }
3750
3751 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3752 {
3753         struct ieee80211_local *local = sdata->local;
3754         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3755         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3756         u32 tx_flags = 0;
3757         u16 trans = 1;
3758         u16 status = 0;
3759
3760         sdata_assert_lock(sdata);
3761
3762         if (WARN_ON_ONCE(!auth_data))
3763                 return -EINVAL;
3764
3765         auth_data->tries++;
3766
3767         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3768                 sdata_info(sdata, "authentication with %pM timed out\n",
3769                            auth_data->bss->bssid);
3770
3771                 /*
3772                  * Most likely AP is not in the range so remove the
3773                  * bss struct for that AP.
3774                  */
3775                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3776
3777                 return -ETIMEDOUT;
3778         }
3779
3780         drv_mgd_prepare_tx(local, sdata);
3781
3782         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3783                    auth_data->bss->bssid, auth_data->tries,
3784                    IEEE80211_AUTH_MAX_TRIES);
3785
3786         auth_data->expected_transaction = 2;
3787
3788         if (auth_data->algorithm == WLAN_AUTH_SAE) {
3789                 trans = auth_data->sae_trans;
3790                 status = auth_data->sae_status;
3791                 auth_data->expected_transaction = trans;
3792         }
3793
3794         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3795                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3796                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3797
3798         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3799                             auth_data->data, auth_data->data_len,
3800                             auth_data->bss->bssid,
3801                             auth_data->bss->bssid, NULL, 0, 0,
3802                             tx_flags);
3803
3804         if (tx_flags == 0) {
3805                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3806                 auth_data->timeout_started = true;
3807                 run_again(sdata, auth_data->timeout);
3808         } else {
3809                 auth_data->timeout =
3810                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3811                 auth_data->timeout_started = true;
3812                 run_again(sdata, auth_data->timeout);
3813         }
3814
3815         return 0;
3816 }
3817
3818 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3819 {
3820         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3821         struct ieee80211_local *local = sdata->local;
3822
3823         sdata_assert_lock(sdata);
3824
3825         assoc_data->tries++;
3826         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3827                 sdata_info(sdata, "association with %pM timed out\n",
3828                            assoc_data->bss->bssid);
3829
3830                 /*
3831                  * Most likely AP is not in the range so remove the
3832                  * bss struct for that AP.
3833                  */
3834                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3835
3836                 return -ETIMEDOUT;
3837         }
3838
3839         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3840                    assoc_data->bss->bssid, assoc_data->tries,
3841                    IEEE80211_ASSOC_MAX_TRIES);
3842         ieee80211_send_assoc(sdata);
3843
3844         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3845                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3846                 assoc_data->timeout_started = true;
3847                 run_again(sdata, assoc_data->timeout);
3848         } else {
3849                 assoc_data->timeout =
3850                         round_jiffies_up(jiffies +
3851                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3852                 assoc_data->timeout_started = true;
3853                 run_again(sdata, assoc_data->timeout);
3854         }
3855
3856         return 0;
3857 }
3858
3859 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3860                                   __le16 fc, bool acked)
3861 {
3862         struct ieee80211_local *local = sdata->local;
3863
3864         sdata->u.mgd.status_fc = fc;
3865         sdata->u.mgd.status_acked = acked;
3866         sdata->u.mgd.status_received = true;
3867
3868         ieee80211_queue_work(&local->hw, &sdata->work);
3869 }
3870
3871 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3872 {
3873         struct ieee80211_local *local = sdata->local;
3874         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3875
3876         sdata_lock(sdata);
3877
3878         if (ifmgd->status_received) {
3879                 __le16 fc = ifmgd->status_fc;
3880                 bool status_acked = ifmgd->status_acked;
3881
3882                 ifmgd->status_received = false;
3883                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3884                         if (status_acked) {
3885                                 ifmgd->auth_data->timeout =
3886                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3887                                 run_again(sdata, ifmgd->auth_data->timeout);
3888                         } else {
3889                                 ifmgd->auth_data->timeout = jiffies - 1;
3890                         }
3891                         ifmgd->auth_data->timeout_started = true;
3892                 } else if (ifmgd->assoc_data &&
3893                            (ieee80211_is_assoc_req(fc) ||
3894                             ieee80211_is_reassoc_req(fc))) {
3895                         if (status_acked) {
3896                                 ifmgd->assoc_data->timeout =
3897                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3898                                 run_again(sdata, ifmgd->assoc_data->timeout);
3899                         } else {
3900                                 ifmgd->assoc_data->timeout = jiffies - 1;
3901                         }
3902                         ifmgd->assoc_data->timeout_started = true;
3903                 }
3904         }
3905
3906         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3907             time_after(jiffies, ifmgd->auth_data->timeout)) {
3908                 if (ifmgd->auth_data->done) {
3909                         /*
3910                          * ok ... we waited for assoc but userspace didn't,
3911                          * so let's just kill the auth data
3912                          */
3913                         ieee80211_destroy_auth_data(sdata, false);
3914                 } else if (ieee80211_auth(sdata)) {
3915                         u8 bssid[ETH_ALEN];
3916                         struct ieee80211_event event = {
3917                                 .type = MLME_EVENT,
3918                                 .u.mlme.data = AUTH_EVENT,
3919                                 .u.mlme.status = MLME_TIMEOUT,
3920                         };
3921
3922                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3923
3924                         ieee80211_destroy_auth_data(sdata, false);
3925
3926                         cfg80211_auth_timeout(sdata->dev, bssid);
3927                         drv_event_callback(sdata->local, sdata, &event);
3928                 }
3929         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3930                 run_again(sdata, ifmgd->auth_data->timeout);
3931
3932         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3933             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3934                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3935                     ieee80211_do_assoc(sdata)) {
3936                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3937                         struct ieee80211_event event = {
3938                                 .type = MLME_EVENT,
3939                                 .u.mlme.data = ASSOC_EVENT,
3940                                 .u.mlme.status = MLME_TIMEOUT,
3941                         };
3942
3943                         ieee80211_destroy_assoc_data(sdata, false, false);
3944                         cfg80211_assoc_timeout(sdata->dev, bss);
3945                         drv_event_callback(sdata->local, sdata, &event);
3946                 }
3947         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3948                 run_again(sdata, ifmgd->assoc_data->timeout);
3949
3950         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3951             ifmgd->associated) {
3952                 u8 bssid[ETH_ALEN];
3953                 int max_tries;
3954
3955                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3956
3957                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3958                         max_tries = max_nullfunc_tries;
3959                 else
3960                         max_tries = max_probe_tries;
3961
3962                 /* ACK received for nullfunc probing frame */
3963                 if (!ifmgd->probe_send_count)
3964                         ieee80211_reset_ap_probe(sdata);
3965                 else if (ifmgd->nullfunc_failed) {
3966                         if (ifmgd->probe_send_count < max_tries) {
3967                                 mlme_dbg(sdata,
3968                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3969                                          bssid, ifmgd->probe_send_count,
3970                                          max_tries);
3971                                 ieee80211_mgd_probe_ap_send(sdata);
3972                         } else {
3973                                 mlme_dbg(sdata,
3974                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3975                                          bssid);
3976                                 ieee80211_sta_connection_lost(sdata, bssid,
3977                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3978                                         false);
3979                         }
3980                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3981                         run_again(sdata, ifmgd->probe_timeout);
3982                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3983                         mlme_dbg(sdata,
3984                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3985                                  bssid, probe_wait_ms);
3986                         ieee80211_sta_connection_lost(sdata, bssid,
3987                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3988                 } else if (ifmgd->probe_send_count < max_tries) {
3989                         mlme_dbg(sdata,
3990                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3991                                  bssid, probe_wait_ms,
3992                                  ifmgd->probe_send_count, max_tries);
3993                         ieee80211_mgd_probe_ap_send(sdata);
3994                 } else {
3995                         /*
3996                          * We actually lost the connection ... or did we?
3997                          * Let's make sure!
3998                          */
3999                         mlme_dbg(sdata,
4000                                  "No probe response from AP %pM after %dms, disconnecting.\n",
4001                                  bssid, probe_wait_ms);
4002
4003                         ieee80211_sta_connection_lost(sdata, bssid,
4004                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4005                 }
4006         }
4007
4008         sdata_unlock(sdata);
4009 }
4010
4011 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
4012 {
4013         struct ieee80211_sub_if_data *sdata =
4014                 (struct ieee80211_sub_if_data *) data;
4015         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4016
4017         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4018                 return;
4019
4020         sdata->u.mgd.connection_loss = false;
4021         ieee80211_queue_work(&sdata->local->hw,
4022                              &sdata->u.mgd.beacon_connection_loss_work);
4023 }
4024
4025 static void ieee80211_sta_conn_mon_timer(unsigned long data)
4026 {
4027         struct ieee80211_sub_if_data *sdata =
4028                 (struct ieee80211_sub_if_data *) data;
4029         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4030         struct ieee80211_local *local = sdata->local;
4031
4032         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4033                 return;
4034
4035         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4036 }
4037
4038 static void ieee80211_sta_monitor_work(struct work_struct *work)
4039 {
4040         struct ieee80211_sub_if_data *sdata =
4041                 container_of(work, struct ieee80211_sub_if_data,
4042                              u.mgd.monitor_work);
4043
4044         ieee80211_mgd_probe_ap(sdata, false);
4045 }
4046
4047 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4048 {
4049         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4050                 __ieee80211_stop_poll(sdata);
4051
4052                 /* let's probe the connection once */
4053                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4054                         ieee80211_queue_work(&sdata->local->hw,
4055                                              &sdata->u.mgd.monitor_work);
4056         }
4057 }
4058
4059 #ifdef CONFIG_PM
4060 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4061 {
4062         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4063         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4064
4065         sdata_lock(sdata);
4066
4067         if (ifmgd->auth_data || ifmgd->assoc_data) {
4068                 const u8 *bssid = ifmgd->auth_data ?
4069                                 ifmgd->auth_data->bss->bssid :
4070                                 ifmgd->assoc_data->bss->bssid;
4071
4072                 /*
4073                  * If we are trying to authenticate / associate while suspending,
4074                  * cfg80211 won't know and won't actually abort those attempts,
4075                  * thus we need to do that ourselves.
4076                  */
4077                 ieee80211_send_deauth_disassoc(sdata, bssid,
4078                                                IEEE80211_STYPE_DEAUTH,
4079                                                WLAN_REASON_DEAUTH_LEAVING,
4080                                                false, frame_buf);
4081                 if (ifmgd->assoc_data)
4082                         ieee80211_destroy_assoc_data(sdata, false, true);
4083                 if (ifmgd->auth_data)
4084                         ieee80211_destroy_auth_data(sdata, false);
4085                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4086                                       IEEE80211_DEAUTH_FRAME_LEN);
4087         }
4088
4089         /* This is a bit of a hack - we should find a better and more generic
4090          * solution to this. Normally when suspending, cfg80211 will in fact
4091          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4092          * auth (not so important) or assoc (this is the problem) process.
4093          *
4094          * As a consequence, it can happen that we are in the process of both
4095          * associating and suspending, and receive an association response
4096          * after cfg80211 has checked if it needs to disconnect, but before
4097          * we actually set the flag to drop incoming frames. This will then
4098          * cause the workqueue flush to process the association response in
4099          * the suspend, resulting in a successful association just before it
4100          * tries to remove the interface from the driver, which now though
4101          * has a channel context assigned ... this results in issues.
4102          *
4103          * To work around this (for now) simply deauth here again if we're
4104          * now connected.
4105          */
4106         if (ifmgd->associated && !sdata->local->wowlan) {
4107                 u8 bssid[ETH_ALEN];
4108                 struct cfg80211_deauth_request req = {
4109                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4110                         .bssid = bssid,
4111                 };
4112
4113                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4114                 ieee80211_mgd_deauth(sdata, &req);
4115         }
4116
4117         sdata_unlock(sdata);
4118 }
4119
4120 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4121 {
4122         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4123
4124         sdata_lock(sdata);
4125         if (!ifmgd->associated) {
4126                 sdata_unlock(sdata);
4127                 return;
4128         }
4129
4130         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4131                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4132                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4133                 ieee80211_sta_connection_lost(sdata,
4134                                               ifmgd->associated->bssid,
4135                                               WLAN_REASON_UNSPECIFIED,
4136                                               true);
4137                 sdata_unlock(sdata);
4138                 return;
4139         }
4140         sdata_unlock(sdata);
4141 }
4142 #endif
4143
4144 /* interface setup */
4145 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4146 {
4147         struct ieee80211_if_managed *ifmgd;
4148
4149         ifmgd = &sdata->u.mgd;
4150         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4151         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4152         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4153                   ieee80211_beacon_connection_loss_work);
4154         INIT_WORK(&ifmgd->csa_connection_drop_work,
4155                   ieee80211_csa_connection_drop_work);
4156         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4157         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4158                           ieee80211_tdls_peer_del_work);
4159         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4160                     (unsigned long) sdata);
4161         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4162                     (unsigned long) sdata);
4163         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4164                     (unsigned long) sdata);
4165         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4166                     (unsigned long) sdata);
4167         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4168                           ieee80211_sta_handle_tspec_ac_params_wk);
4169
4170         ifmgd->flags = 0;
4171         ifmgd->powersave = sdata->wdev.ps;
4172         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4173         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4174         ifmgd->p2p_noa_index = -1;
4175
4176         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4177                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4178         else
4179                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4180
4181         /* Setup TDLS data */
4182         spin_lock_init(&ifmgd->teardown_lock);
4183         ifmgd->teardown_skb = NULL;
4184         ifmgd->orig_teardown_skb = NULL;
4185 }
4186
4187 /* scan finished notification */
4188 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4189 {
4190         struct ieee80211_sub_if_data *sdata;
4191
4192         /* Restart STA timers */
4193         rcu_read_lock();
4194         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4195                 if (ieee80211_sdata_running(sdata))
4196                         ieee80211_restart_sta_timer(sdata);
4197         }
4198         rcu_read_unlock();
4199 }
4200
4201 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4202                                      struct cfg80211_bss *cbss)
4203 {
4204         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4205         const u8 *ht_cap_ie, *vht_cap_ie;
4206         const struct ieee80211_ht_cap *ht_cap;
4207         const struct ieee80211_vht_cap *vht_cap;
4208         u8 chains = 1;
4209
4210         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4211                 return chains;
4212
4213         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4214         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4215                 ht_cap = (void *)(ht_cap_ie + 2);
4216                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4217                 /*
4218                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4219                  *       "Tx Unequal Modulation Supported" fields.
4220                  */
4221         }
4222
4223         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4224                 return chains;
4225
4226         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4227         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4228                 u8 nss;
4229                 u16 tx_mcs_map;
4230
4231                 vht_cap = (void *)(vht_cap_ie + 2);
4232                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4233                 for (nss = 8; nss > 0; nss--) {
4234                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4235                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4236                                 break;
4237                 }
4238                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4239                 chains = max(chains, nss);
4240         }
4241
4242         return chains;
4243 }
4244
4245 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4246                                   struct cfg80211_bss *cbss)
4247 {
4248         struct ieee80211_local *local = sdata->local;
4249         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4250         const struct ieee80211_ht_cap *ht_cap = NULL;
4251         const struct ieee80211_ht_operation *ht_oper = NULL;
4252         const struct ieee80211_vht_operation *vht_oper = NULL;
4253         struct ieee80211_supported_band *sband;
4254         struct cfg80211_chan_def chandef;
4255         int ret;
4256         u32 i;
4257         bool have_80mhz;
4258
4259         sband = local->hw.wiphy->bands[cbss->channel->band];
4260
4261         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4262                           IEEE80211_STA_DISABLE_80P80MHZ |
4263                           IEEE80211_STA_DISABLE_160MHZ);
4264
4265         rcu_read_lock();
4266
4267         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4268             sband->ht_cap.ht_supported) {
4269                 const u8 *ht_oper_ie, *ht_cap_ie;
4270
4271                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4272                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4273                         ht_oper = (void *)(ht_oper_ie + 2);
4274
4275                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4276                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4277                         ht_cap = (void *)(ht_cap_ie + 2);
4278
4279                 if (!ht_cap) {
4280                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4281                         ht_oper = NULL;
4282                 }
4283         }
4284
4285         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4286             sband->vht_cap.vht_supported) {
4287                 const u8 *vht_oper_ie, *vht_cap;
4288
4289                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4290                                                    WLAN_EID_VHT_OPERATION);
4291                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4292                         vht_oper = (void *)(vht_oper_ie + 2);
4293                 if (vht_oper && !ht_oper) {
4294                         vht_oper = NULL;
4295                         sdata_info(sdata,
4296                                    "AP advertised VHT without HT, disabling both\n");
4297                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4298                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4299                 }
4300
4301                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4302                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4303                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4304                         vht_oper = NULL;
4305                 }
4306         }
4307
4308         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4309         have_80mhz = false;
4310         for (i = 0; i < sband->n_channels; i++) {
4311                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4312                                                 IEEE80211_CHAN_NO_80MHZ))
4313                         continue;
4314
4315                 have_80mhz = true;
4316                 break;
4317         }
4318
4319         if (!have_80mhz)
4320                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4321
4322         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4323                                                      cbss->channel,
4324                                                      ht_cap, ht_oper, vht_oper,
4325                                                      &chandef, false);
4326
4327         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4328                                       local->rx_chains);
4329
4330         rcu_read_unlock();
4331
4332         /* will change later if needed */
4333         sdata->smps_mode = IEEE80211_SMPS_OFF;
4334
4335         mutex_lock(&local->mtx);
4336         /*
4337          * If this fails (possibly due to channel context sharing
4338          * on incompatible channels, e.g. 80+80 and 160 sharing the
4339          * same control channel) try to use a smaller bandwidth.
4340          */
4341         ret = ieee80211_vif_use_channel(sdata, &chandef,
4342                                         IEEE80211_CHANCTX_SHARED);
4343
4344         /* don't downgrade for 5 and 10 MHz channels, though. */
4345         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4346             chandef.width == NL80211_CHAN_WIDTH_10)
4347                 goto out;
4348
4349         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4350                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4351                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4352                                                 IEEE80211_CHANCTX_SHARED);
4353         }
4354  out:
4355         mutex_unlock(&local->mtx);
4356         return ret;
4357 }
4358
4359 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4360                                      struct cfg80211_bss *cbss, bool assoc,
4361                                      bool override)
4362 {
4363         struct ieee80211_local *local = sdata->local;
4364         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4365         struct ieee80211_bss *bss = (void *)cbss->priv;
4366         struct sta_info *new_sta = NULL;
4367         struct ieee80211_supported_band *sband;
4368         bool have_sta = false;
4369         int err;
4370
4371         sband = local->hw.wiphy->bands[cbss->channel->band];
4372
4373         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4374                 return -EINVAL;
4375
4376         /* If a reconfig is happening, bail out */
4377         if (local->in_reconfig)
4378                 return -EBUSY;
4379
4380         if (assoc) {
4381                 rcu_read_lock();
4382                 have_sta = sta_info_get(sdata, cbss->bssid);
4383                 rcu_read_unlock();
4384         }
4385
4386         if (!have_sta) {
4387                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4388                 if (!new_sta)
4389                         return -ENOMEM;
4390         }
4391
4392         /*
4393          * Set up the information for the new channel before setting the
4394          * new channel. We can't - completely race-free - change the basic
4395          * rates bitmap and the channel (sband) that it refers to, but if
4396          * we set it up before we at least avoid calling into the driver's
4397          * bss_info_changed() method with invalid information (since we do
4398          * call that from changing the channel - only for IDLE and perhaps
4399          * some others, but ...).
4400          *
4401          * So to avoid that, just set up all the new information before the
4402          * channel, but tell the driver to apply it only afterwards, since
4403          * it might need the new channel for that.
4404          */
4405         if (new_sta) {
4406                 u32 rates = 0, basic_rates = 0;
4407                 bool have_higher_than_11mbit;
4408                 int min_rate = INT_MAX, min_rate_index = -1;
4409                 const struct cfg80211_bss_ies *ies;
4410                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4411
4412                 ieee80211_get_rates(sband, bss->supp_rates,
4413                                     bss->supp_rates_len,
4414                                     &rates, &basic_rates,
4415                                     &have_higher_than_11mbit,
4416                                     &min_rate, &min_rate_index,
4417                                     shift);
4418
4419                 /*
4420                  * This used to be a workaround for basic rates missing
4421                  * in the association response frame. Now that we no
4422                  * longer use the basic rates from there, it probably
4423                  * doesn't happen any more, but keep the workaround so
4424                  * in case some *other* APs are buggy in different ways
4425                  * we can connect -- with a warning.
4426                  */
4427                 if (!basic_rates && min_rate_index >= 0) {
4428                         sdata_info(sdata,
4429                                    "No basic rates, using min rate instead\n");
4430                         basic_rates = BIT(min_rate_index);
4431                 }
4432
4433                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4434                 sdata->vif.bss_conf.basic_rates = basic_rates;
4435
4436                 /* cf. IEEE 802.11 9.2.12 */
4437                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4438                     have_higher_than_11mbit)
4439                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4440                 else
4441                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4442
4443                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4444
4445                 /* set timing information */
4446                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4447                 rcu_read_lock();
4448                 ies = rcu_dereference(cbss->beacon_ies);
4449                 if (ies) {
4450                         const u8 *tim_ie;
4451
4452                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4453                         sdata->vif.bss_conf.sync_device_ts =
4454                                 bss->device_ts_beacon;
4455                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4456                                                   ies->data, ies->len);
4457                         if (tim_ie && tim_ie[1] >= 2)
4458                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4459                         else
4460                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4461                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4462                                                TIMING_BEACON_ONLY)) {
4463                         ies = rcu_dereference(cbss->proberesp_ies);
4464                         /* must be non-NULL since beacon IEs were NULL */
4465                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4466                         sdata->vif.bss_conf.sync_device_ts =
4467                                 bss->device_ts_presp;
4468                         sdata->vif.bss_conf.sync_dtim_count = 0;
4469                 } else {
4470                         sdata->vif.bss_conf.sync_tsf = 0;
4471                         sdata->vif.bss_conf.sync_device_ts = 0;
4472                         sdata->vif.bss_conf.sync_dtim_count = 0;
4473                 }
4474                 rcu_read_unlock();
4475         }
4476
4477         if (new_sta || override) {
4478                 err = ieee80211_prep_channel(sdata, cbss);
4479                 if (err) {
4480                         if (new_sta)
4481                                 sta_info_free(local, new_sta);
4482                         return -EINVAL;
4483                 }
4484         }
4485
4486         if (new_sta) {
4487                 /*
4488                  * tell driver about BSSID, basic rates and timing
4489                  * this was set up above, before setting the channel
4490                  */
4491                 ieee80211_bss_info_change_notify(sdata,
4492                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4493                         BSS_CHANGED_BEACON_INT);
4494
4495                 if (assoc)
4496                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4497
4498                 err = sta_info_insert(new_sta);
4499                 new_sta = NULL;
4500                 if (err) {
4501                         sdata_info(sdata,
4502                                    "failed to insert STA entry for the AP (error %d)\n",
4503                                    err);
4504                         return err;
4505                 }
4506         } else
4507                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4508
4509         /* Cancel scan to ensure that nothing interferes with connection */
4510         if (local->scanning)
4511                 ieee80211_scan_cancel(local);
4512
4513         return 0;
4514 }
4515
4516 /* config hooks */
4517 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4518                        struct cfg80211_auth_request *req)
4519 {
4520         struct ieee80211_local *local = sdata->local;
4521         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4522         struct ieee80211_mgd_auth_data *auth_data;
4523         u16 auth_alg;
4524         int err;
4525
4526         /* prepare auth data structure */
4527
4528         switch (req->auth_type) {
4529         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4530                 auth_alg = WLAN_AUTH_OPEN;
4531                 break;
4532         case NL80211_AUTHTYPE_SHARED_KEY:
4533                 if (IS_ERR(local->wep_tx_tfm))
4534                         return -EOPNOTSUPP;
4535                 auth_alg = WLAN_AUTH_SHARED_KEY;
4536                 break;
4537         case NL80211_AUTHTYPE_FT:
4538                 auth_alg = WLAN_AUTH_FT;
4539                 break;
4540         case NL80211_AUTHTYPE_NETWORK_EAP:
4541                 auth_alg = WLAN_AUTH_LEAP;
4542                 break;
4543         case NL80211_AUTHTYPE_SAE:
4544                 auth_alg = WLAN_AUTH_SAE;
4545                 break;
4546         case NL80211_AUTHTYPE_FILS_SK:
4547                 auth_alg = WLAN_AUTH_FILS_SK;
4548                 break;
4549         case NL80211_AUTHTYPE_FILS_SK_PFS:
4550                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4551                 break;
4552         case NL80211_AUTHTYPE_FILS_PK:
4553                 auth_alg = WLAN_AUTH_FILS_PK;
4554                 break;
4555         default:
4556                 return -EOPNOTSUPP;
4557         }
4558
4559         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4560                             req->ie_len, GFP_KERNEL);
4561         if (!auth_data)
4562                 return -ENOMEM;
4563
4564         auth_data->bss = req->bss;
4565
4566         if (req->auth_data_len >= 4) {
4567                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4568                         __le16 *pos = (__le16 *) req->auth_data;
4569
4570                         auth_data->sae_trans = le16_to_cpu(pos[0]);
4571                         auth_data->sae_status = le16_to_cpu(pos[1]);
4572                 }
4573                 memcpy(auth_data->data, req->auth_data + 4,
4574                        req->auth_data_len - 4);
4575                 auth_data->data_len += req->auth_data_len - 4;
4576         }
4577
4578         if (req->ie && req->ie_len) {
4579                 memcpy(&auth_data->data[auth_data->data_len],
4580                        req->ie, req->ie_len);
4581                 auth_data->data_len += req->ie_len;
4582         }
4583
4584         if (req->key && req->key_len) {
4585                 auth_data->key_len = req->key_len;
4586                 auth_data->key_idx = req->key_idx;
4587                 memcpy(auth_data->key, req->key, req->key_len);
4588         }
4589
4590         auth_data->algorithm = auth_alg;
4591
4592         /* try to authenticate/probe */
4593
4594         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4595             ifmgd->assoc_data) {
4596                 err = -EBUSY;
4597                 goto err_free;
4598         }
4599
4600         if (ifmgd->auth_data)
4601                 ieee80211_destroy_auth_data(sdata, false);
4602
4603         /* prep auth_data so we don't go into idle on disassoc */
4604         ifmgd->auth_data = auth_data;
4605
4606         if (ifmgd->associated) {
4607                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4608
4609                 sdata_info(sdata,
4610                            "disconnect from AP %pM for new auth to %pM\n",
4611                            ifmgd->associated->bssid, req->bss->bssid);
4612                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4613                                        WLAN_REASON_UNSPECIFIED,
4614                                        false, frame_buf);
4615
4616                 ieee80211_report_disconnect(sdata, frame_buf,
4617                                             sizeof(frame_buf), true,
4618                                             WLAN_REASON_UNSPECIFIED);
4619         }
4620
4621         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4622
4623         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4624         if (err)
4625                 goto err_clear;
4626
4627         err = ieee80211_auth(sdata);
4628         if (err) {
4629                 sta_info_destroy_addr(sdata, req->bss->bssid);
4630                 goto err_clear;
4631         }
4632
4633         /* hold our own reference */
4634         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4635         return 0;
4636
4637  err_clear:
4638         eth_zero_addr(ifmgd->bssid);
4639         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4640         ifmgd->auth_data = NULL;
4641         mutex_lock(&sdata->local->mtx);
4642         ieee80211_vif_release_channel(sdata);
4643         mutex_unlock(&sdata->local->mtx);
4644  err_free:
4645         kfree(auth_data);
4646         return err;
4647 }
4648
4649 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4650                         struct cfg80211_assoc_request *req)
4651 {
4652         struct ieee80211_local *local = sdata->local;
4653         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4654         struct ieee80211_bss *bss = (void *)req->bss->priv;
4655         struct ieee80211_mgd_assoc_data *assoc_data;
4656         const struct cfg80211_bss_ies *beacon_ies;
4657         struct ieee80211_supported_band *sband;
4658         const u8 *ssidie, *ht_ie, *vht_ie;
4659         int i, err;
4660         bool override = false;
4661
4662         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4663         if (!assoc_data)
4664                 return -ENOMEM;
4665
4666         rcu_read_lock();
4667         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4668         if (!ssidie) {
4669                 rcu_read_unlock();
4670                 kfree(assoc_data);
4671                 return -EINVAL;
4672         }
4673         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4674         assoc_data->ssid_len = ssidie[1];
4675         rcu_read_unlock();
4676
4677         if (ifmgd->associated) {
4678                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4679
4680                 sdata_info(sdata,
4681                            "disconnect from AP %pM for new assoc to %pM\n",
4682                            ifmgd->associated->bssid, req->bss->bssid);
4683                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4684                                        WLAN_REASON_UNSPECIFIED,
4685                                        false, frame_buf);
4686
4687                 ieee80211_report_disconnect(sdata, frame_buf,
4688                                             sizeof(frame_buf), true,
4689                                             WLAN_REASON_UNSPECIFIED);
4690         }
4691
4692         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4693                 err = -EBUSY;
4694                 goto err_free;
4695         }
4696
4697         if (ifmgd->assoc_data) {
4698                 err = -EBUSY;
4699                 goto err_free;
4700         }
4701
4702         if (ifmgd->auth_data) {
4703                 bool match;
4704
4705                 /* keep sta info, bssid if matching */
4706                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4707                 ieee80211_destroy_auth_data(sdata, match);
4708         }
4709
4710         /* prepare assoc data */
4711
4712         ifmgd->beacon_crc_valid = false;
4713
4714         assoc_data->wmm = bss->wmm_used &&
4715                           (local->hw.queues >= IEEE80211_NUM_ACS);
4716
4717         /*
4718          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4719          * We still associate in non-HT mode (11a/b/g) if any one of these
4720          * ciphers is configured as pairwise.
4721          * We can set this to true for non-11n hardware, that'll be checked
4722          * separately along with the peer capabilities.
4723          */
4724         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4725                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4726                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4727                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4728                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4729                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4730                         netdev_info(sdata->dev,
4731                                     "disabling HT/VHT due to WEP/TKIP use\n");
4732                 }
4733         }
4734
4735         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4736         sband = local->hw.wiphy->bands[req->bss->channel->band];
4737         if (!sband->ht_cap.ht_supported ||
4738             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4739             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4740                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4741                 if (!bss->wmm_used &&
4742                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4743                         netdev_info(sdata->dev,
4744                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4745         }
4746
4747         /* disable VHT if we don't support it or the AP doesn't use WMM */
4748         if (!sband->vht_cap.vht_supported ||
4749             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4750             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4751                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4752                 if (!bss->wmm_used &&
4753                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4754                         netdev_info(sdata->dev,
4755                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4756         }
4757
4758         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4759         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4760                sizeof(ifmgd->ht_capa_mask));
4761
4762         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4763         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4764                sizeof(ifmgd->vht_capa_mask));
4765
4766         if (req->ie && req->ie_len) {
4767                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4768                 assoc_data->ie_len = req->ie_len;
4769         }
4770
4771         if (req->fils_kek) {
4772                 /* should already be checked in cfg80211 - so warn */
4773                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4774                         err = -EINVAL;
4775                         goto err_free;
4776                 }
4777                 memcpy(assoc_data->fils_kek, req->fils_kek,
4778                        req->fils_kek_len);
4779                 assoc_data->fils_kek_len = req->fils_kek_len;
4780         }
4781
4782         if (req->fils_nonces)
4783                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4784                        2 * FILS_NONCE_LEN);
4785
4786         assoc_data->bss = req->bss;
4787
4788         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4789                 if (ifmgd->powersave)
4790                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4791                 else
4792                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4793         } else
4794                 sdata->smps_mode = ifmgd->req_smps;
4795
4796         assoc_data->capability = req->bss->capability;
4797         assoc_data->supp_rates = bss->supp_rates;
4798         assoc_data->supp_rates_len = bss->supp_rates_len;
4799
4800         rcu_read_lock();
4801         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4802         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4803                 assoc_data->ap_ht_param =
4804                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4805         else
4806                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4807         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4808         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4809                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4810                        sizeof(struct ieee80211_vht_cap));
4811         else
4812                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4813         rcu_read_unlock();
4814
4815         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4816                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4817              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4818                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4819
4820         if (bss->wmm_used && bss->uapsd_supported &&
4821             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4822                 assoc_data->uapsd = true;
4823                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4824         } else {
4825                 assoc_data->uapsd = false;
4826                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4827         }
4828
4829         if (req->prev_bssid)
4830                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4831
4832         if (req->use_mfp) {
4833                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4834                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4835         } else {
4836                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4837                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4838         }
4839
4840         if (req->flags & ASSOC_REQ_USE_RRM)
4841                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4842         else
4843                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4844
4845         if (req->crypto.control_port)
4846                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4847         else
4848                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4849
4850         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4851         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4852         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4853                                                         sdata->vif.type);
4854
4855         /* kick off associate process */
4856
4857         ifmgd->assoc_data = assoc_data;
4858         ifmgd->dtim_period = 0;
4859         ifmgd->have_beacon = false;
4860
4861         /* override HT/VHT configuration only if the AP and we support it */
4862         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4863                 struct ieee80211_sta_ht_cap sta_ht_cap;
4864
4865                 if (req->flags & ASSOC_REQ_DISABLE_HT)
4866                         override = true;
4867
4868                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4869                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4870
4871                 /* check for 40 MHz disable override */
4872                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4873                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4874                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4875                         override = true;
4876
4877                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4878                     req->flags & ASSOC_REQ_DISABLE_VHT)
4879                         override = true;
4880         }
4881
4882         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4883                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4884                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4885         }
4886
4887         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4888                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4889
4890         err = ieee80211_prep_connection(sdata, req->bss, true, override);
4891         if (err)
4892                 goto err_clear;
4893
4894         rcu_read_lock();
4895         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4896
4897         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4898             !beacon_ies) {
4899                 /*
4900                  * Wait up to one beacon interval ...
4901                  * should this be more if we miss one?
4902                  */
4903                 sdata_info(sdata, "waiting for beacon from %pM\n",
4904                            ifmgd->bssid);
4905                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4906                 assoc_data->timeout_started = true;
4907                 assoc_data->need_beacon = true;
4908         } else if (beacon_ies) {
4909                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4910                                                     beacon_ies->data,
4911                                                     beacon_ies->len);
4912                 u8 dtim_count = 0;
4913
4914                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4915                         const struct ieee80211_tim_ie *tim;
4916                         tim = (void *)(tim_ie + 2);
4917                         ifmgd->dtim_period = tim->dtim_period;
4918                         dtim_count = tim->dtim_count;
4919                 }
4920                 ifmgd->have_beacon = true;
4921                 assoc_data->timeout = jiffies;
4922                 assoc_data->timeout_started = true;
4923
4924                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4925                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4926                         sdata->vif.bss_conf.sync_device_ts =
4927                                 bss->device_ts_beacon;
4928                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4929                 }
4930         } else {
4931                 assoc_data->timeout = jiffies;
4932                 assoc_data->timeout_started = true;
4933         }
4934         rcu_read_unlock();
4935
4936         run_again(sdata, assoc_data->timeout);
4937
4938         if (bss->corrupt_data) {
4939                 char *corrupt_type = "data";
4940                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4941                         if (bss->corrupt_data &
4942                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4943                                 corrupt_type = "beacon and probe response";
4944                         else
4945                                 corrupt_type = "beacon";
4946                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4947                         corrupt_type = "probe response";
4948                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4949                            corrupt_type);
4950         }
4951
4952         return 0;
4953  err_clear:
4954         eth_zero_addr(ifmgd->bssid);
4955         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4956         ifmgd->assoc_data = NULL;
4957  err_free:
4958         kfree(assoc_data);
4959         return err;
4960 }
4961
4962 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4963                          struct cfg80211_deauth_request *req)
4964 {
4965         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4966         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4967         bool tx = !req->local_state_change;
4968
4969         if (ifmgd->auth_data &&
4970             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4971                 sdata_info(sdata,
4972                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4973                            req->bssid, req->reason_code,
4974                            ieee80211_get_reason_code_string(req->reason_code));
4975
4976                 drv_mgd_prepare_tx(sdata->local, sdata);
4977                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4978                                                IEEE80211_STYPE_DEAUTH,
4979                                                req->reason_code, tx,
4980                                                frame_buf);
4981                 ieee80211_destroy_auth_data(sdata, false);
4982                 ieee80211_report_disconnect(sdata, frame_buf,
4983                                             sizeof(frame_buf), true,
4984                                             req->reason_code);
4985
4986                 return 0;
4987         }
4988
4989         if (ifmgd->assoc_data &&
4990             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4991                 sdata_info(sdata,
4992                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
4993                            req->bssid, req->reason_code,
4994                            ieee80211_get_reason_code_string(req->reason_code));
4995
4996                 drv_mgd_prepare_tx(sdata->local, sdata);
4997                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4998                                                IEEE80211_STYPE_DEAUTH,
4999                                                req->reason_code, tx,
5000                                                frame_buf);
5001                 ieee80211_destroy_assoc_data(sdata, false, true);
5002                 ieee80211_report_disconnect(sdata, frame_buf,
5003                                             sizeof(frame_buf), true,
5004                                             req->reason_code);
5005                 return 0;
5006         }
5007
5008         if (ifmgd->associated &&
5009             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5010                 sdata_info(sdata,
5011                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5012                            req->bssid, req->reason_code,
5013                            ieee80211_get_reason_code_string(req->reason_code));
5014
5015                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5016                                        req->reason_code, tx, frame_buf);
5017                 ieee80211_report_disconnect(sdata, frame_buf,
5018                                             sizeof(frame_buf), true,
5019                                             req->reason_code);
5020                 return 0;
5021         }
5022
5023         return -ENOTCONN;
5024 }
5025
5026 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5027                            struct cfg80211_disassoc_request *req)
5028 {
5029         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5030         u8 bssid[ETH_ALEN];
5031         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5032
5033         /*
5034          * cfg80211 should catch this ... but it's racy since
5035          * we can receive a disassoc frame, process it, hand it
5036          * to cfg80211 while that's in a locked section already
5037          * trying to tell us that the user wants to disconnect.
5038          */
5039         if (ifmgd->associated != req->bss)
5040                 return -ENOLINK;
5041
5042         sdata_info(sdata,
5043                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5044                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5045
5046         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5047         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5048                                req->reason_code, !req->local_state_change,
5049                                frame_buf);
5050
5051         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5052                                     req->reason_code);
5053
5054         return 0;
5055 }
5056
5057 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5058 {
5059         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5060
5061         /*
5062          * Make sure some work items will not run after this,
5063          * they will not do anything but might not have been
5064          * cancelled when disconnecting.
5065          */
5066         cancel_work_sync(&ifmgd->monitor_work);
5067         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5068         cancel_work_sync(&ifmgd->request_smps_work);
5069         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5070         cancel_work_sync(&ifmgd->chswitch_work);
5071         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5072
5073         sdata_lock(sdata);
5074         if (ifmgd->assoc_data) {
5075                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5076                 ieee80211_destroy_assoc_data(sdata, false, false);
5077                 cfg80211_assoc_timeout(sdata->dev, bss);
5078         }
5079         if (ifmgd->auth_data)
5080                 ieee80211_destroy_auth_data(sdata, false);
5081         spin_lock_bh(&ifmgd->teardown_lock);
5082         if (ifmgd->teardown_skb) {
5083                 kfree_skb(ifmgd->teardown_skb);
5084                 ifmgd->teardown_skb = NULL;
5085                 ifmgd->orig_teardown_skb = NULL;
5086         }
5087         spin_unlock_bh(&ifmgd->teardown_lock);
5088         del_timer_sync(&ifmgd->timer);
5089         sdata_unlock(sdata);
5090 }
5091
5092 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5093                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5094                                s32 rssi_level,
5095                                gfp_t gfp)
5096 {
5097         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5098
5099         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5100
5101         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5102 }
5103 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5104
5105 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5106 {
5107         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5108
5109         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5110
5111         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5112 }
5113 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);