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  * Copyright (C) 2018        Intel Corporation
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  */
  16
  17 #include <linux/delay.h>
  18 #include <linux/if_ether.h>
  19 #include <linux/skbuff.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/moduleparam.h>
  23 #include <linux/rtnetlink.h>
  24 #include <linux/crc32.h>
  25 #include <linux/slab.h>
  26 #include <linux/export.h>
  27 #include <net/mac80211.h>
  28 #include <asm/unaligned.h>
  29
  30 #include "ieee80211_i.h"
  31 #include "driver-ops.h"
  32 #include "rate.h"
  33 #include "led.h"
  34 #include "fils_aead.h"
  35
  36 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  37 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  38 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  39 #define IEEE80211_AUTH_TIMEOUT_SAE      (HZ * 2)
  40 #define IEEE80211_AUTH_MAX_TRIES        3
  41 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  42 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  43 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  44 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  45 #define IEEE80211_ASSOC_MAX_TRIES       3
  46
  47 static int max_nullfunc_tries = 2;
  48 module_param(max_nullfunc_tries, int, 0644);
  49 MODULE_PARM_DESC(max_nullfunc_tries,
  50                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  51
  52 static int max_probe_tries = 5;
  53 module_param(max_probe_tries, int, 0644);
  54 MODULE_PARM_DESC(max_probe_tries,
  55                  "Maximum probe tries before disconnecting (reason 4).");
  56
  57 /*
  58  * Beacon loss timeout is calculated as N frames times the
  59  * advertised beacon interval.  This may need to be somewhat
  60  * higher than what hardware might detect to account for
  61  * delays in the host processing frames. But since we also
  62  * probe on beacon miss before declaring the connection lost
  63  * default to what we want.
  64  */
  65 static int beacon_loss_count = 7;
  66 module_param(beacon_loss_count, int, 0644);
  67 MODULE_PARM_DESC(beacon_loss_count,
  68                  "Number of beacon intervals before we decide beacon was lost.");
  69
  70 /*
  71  * Time the connection can be idle before we probe
  72  * it to see if we can still talk to the AP.
  73  */
  74 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  75 /*
  76  * Time we wait for a probe response after sending
  77  * a probe request because of beacon loss or for
  78  * checking the connection still works.
  79  */
  80 static int probe_wait_ms = 500;
  81 module_param(probe_wait_ms, int, 0644);
  82 MODULE_PARM_DESC(probe_wait_ms,
  83                  "Maximum time(ms) to wait for probe response"
  84                  " before disconnecting (reason 4).");
  85
  86 /*
  87  * How many Beacon frames need to have been used in average signal strength
  88  * before starting to indicate signal change events.
  89  */
  90 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  91
  92 /*
  93  * We can have multiple work items (and connection probing)
  94  * scheduling this timer, but we need to take care to only
  95  * reschedule it when it should fire _earlier_ than it was
  96  * asked for before, or if it's not pending right now. This
  97  * function ensures that. Note that it then is required to
  98  * run this function for all timeouts after the first one
  99  * has happened -- the work that runs from this timer will
 100  * do that.
 101  */
 102 static void run_again(struct ieee80211_sub_if_data *sdata,
 103                       unsigned long timeout)
 104 {
 105         sdata_assert_lock(sdata);
 106
 107         if (!timer_pending(&sdata->u.mgd.timer) ||
 108             time_before(timeout, sdata->u.mgd.timer.expires))
 109                 mod_timer(&sdata->u.mgd.timer, timeout);
 110 }
 111
 112 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 113 {
 114         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 115                 return;
 116
 117         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 118                 return;
 119
 120         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 121                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 122 }
 123
 124 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 125 {
 126         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 127
 128         if (unlikely(!ifmgd->associated))
 129                 return;
 130
 131         if (ifmgd->probe_send_count)
 132                 ifmgd->probe_send_count = 0;
 133
 134         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 135                 return;
 136
 137         mod_timer(&ifmgd->conn_mon_timer,
 138                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 139 }
 140
 141 static int ecw2cw(int ecw)
 142 {
 143         return (1 << ecw) - 1;
 144 }
 145
 146 static u32
 147 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 148                              struct ieee80211_supported_band *sband,
 149                              struct ieee80211_channel *channel,
 150                              const struct ieee80211_ht_operation *ht_oper,
 151                              const struct ieee80211_vht_operation *vht_oper,
 152                              const struct ieee80211_he_operation *he_oper,
 153                              struct cfg80211_chan_def *chandef, bool tracking)
 154 {
 155         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 156         struct cfg80211_chan_def vht_chandef;
 157         struct ieee80211_sta_ht_cap sta_ht_cap;
 158         u32 ht_cfreq, ret;
 159
 160         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 161         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 162
 163         chandef->chan = channel;
 164         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 165         chandef->center_freq1 = channel->center_freq;
 166         chandef->center_freq2 = 0;
 167
 168         if (!ht_oper || !sta_ht_cap.ht_supported) {
 169                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 170                 goto out;
 171         }
 172
 173         chandef->width = NL80211_CHAN_WIDTH_20;
 174
 175         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 176                                                   channel->band);
 177         /* check that channel matches the right operating channel */
 178         if (!tracking && channel->center_freq != ht_cfreq) {
 179                 /*
 180                  * It's possible that some APs are confused here;
 181                  * Netgear WNDR3700 sometimes reports 4 higher than
 182                  * the actual channel in association responses, but
 183                  * since we look at probe response/beacon data here
 184                  * it should be OK.
 185                  */
 186                 sdata_info(sdata,
 187                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 188                            channel->center_freq, ht_cfreq,
 189                            ht_oper->primary_chan, channel->band);
 190                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 191                 goto out;
 192         }
 193
 194         /* check 40 MHz support, if we have it */
 195         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 196                 ieee80211_chandef_ht_oper(ht_oper, chandef);
 197         } else {
 198                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 199                 ret = IEEE80211_STA_DISABLE_VHT;
 200                 /* also mark 40 MHz disabled */
 201                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 202                 goto out;
 203         }
 204
 205         if (!vht_oper || !sband->vht_cap.vht_supported) {
 206                 ret = IEEE80211_STA_DISABLE_VHT;
 207                 goto out;
 208         }
 209
 210         vht_chandef = *chandef;
 211         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
 212             (le32_to_cpu(he_oper->he_oper_params) &
 213              IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
 214                 struct ieee80211_vht_operation he_oper_vht_cap;
 215
 216                 /*
 217                  * Set only first 3 bytes (other 2 aren't used in
 218                  * ieee80211_chandef_vht_oper() anyway)
 219                  */
 220                 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
 221                 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
 222
 223                 if (!ieee80211_chandef_vht_oper(&he_oper_vht_cap,
 224                                                 &vht_chandef)) {
 225                         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
 226                                 sdata_info(sdata,
 227                                            "HE AP VHT information is invalid, disable HE\n");
 228                         ret = IEEE80211_STA_DISABLE_HE;
 229                         goto out;
 230                 }
 231         } else if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
 232                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 233                         sdata_info(sdata,
 234                                    "AP VHT information is invalid, disable VHT\n");
 235                 ret = IEEE80211_STA_DISABLE_VHT;
 236                 goto out;
 237         }
 238
 239         if (!cfg80211_chandef_valid(&vht_chandef)) {
 240                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 241                         sdata_info(sdata,
 242                                    "AP VHT information is invalid, disable VHT\n");
 243                 ret = IEEE80211_STA_DISABLE_VHT;
 244                 goto out;
 245         }
 246
 247         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 248                 ret = 0;
 249                 goto out;
 250         }
 251
 252         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 253                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 254                         sdata_info(sdata,
 255                                    "AP VHT information doesn't match HT, disable VHT\n");
 256                 ret = IEEE80211_STA_DISABLE_VHT;
 257                 goto out;
 258         }
 259
 260         *chandef = vht_chandef;
 261
 262         ret = 0;
 263
 264 out:
 265         /*
 266          * When tracking the current AP, don't do any further checks if the
 267          * new chandef is identical to the one we're currently using for the
 268          * connection. This keeps us from playing ping-pong with regulatory,
 269          * without it the following can happen (for example):
 270          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 271          *  - AP advertises regdom US
 272          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 273          *  - the code below detects an unsupported channel, downgrades, and
 274          *    we disconnect from the AP in the caller
 275          *  - disconnect causes CRDA to reload world regdomain and the game
 276          *    starts anew.
 277          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 278          *
 279          * It seems possible that there are still scenarios with CSA or real
 280          * bandwidth changes where a this could happen, but those cases are
 281          * less common and wouldn't completely prevent using the AP.
 282          */
 283         if (tracking &&
 284             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 285                 return ret;
 286
 287         /* don't print the message below for VHT mismatch if VHT is disabled */
 288         if (ret & IEEE80211_STA_DISABLE_VHT)
 289                 vht_chandef = *chandef;
 290
 291         /*
 292          * Ignore the DISABLED flag when we're already connected and only
 293          * tracking the APs beacon for bandwidth changes - otherwise we
 294          * might get disconnected here if we connect to an AP, update our
 295          * regulatory information based on the AP's country IE and the
 296          * information we have is wrong/outdated and disables the channel
 297          * that we're actually using for the connection to the AP.
 298          */
 299         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 300                                         tracking ? 0 :
 301                                                    IEEE80211_CHAN_DISABLED)) {
 302                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 303                         ret = IEEE80211_STA_DISABLE_HT |
 304                               IEEE80211_STA_DISABLE_VHT;
 305                         break;
 306                 }
 307
 308                 ret |= ieee80211_chandef_downgrade(chandef);
 309         }
 310
 311         if (chandef->width != vht_chandef.width && !tracking)
 312                 sdata_info(sdata,
 313                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 314
 315         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 316         return ret;
 317 }
 318
 319 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 320                                struct sta_info *sta,
 321                                const struct ieee80211_ht_cap *ht_cap,
 322                                const struct ieee80211_ht_operation *ht_oper,
 323                                const struct ieee80211_vht_operation *vht_oper,
 324                                const struct ieee80211_he_operation *he_oper,
 325                                const u8 *bssid, u32 *changed)
 326 {
 327         struct ieee80211_local *local = sdata->local;
 328         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 329         struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
 330         struct ieee80211_supported_band *sband =
 331                 local->hw.wiphy->bands[chan->band];
 332         struct cfg80211_chan_def chandef;
 333         u16 ht_opmode;
 334         u32 flags;
 335         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 336         int ret;
 337
 338         /* if HT was/is disabled, don't track any bandwidth changes */
 339         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 340                 return 0;
 341
 342         /* don't check VHT if we associated as non-VHT station */
 343         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 344                 vht_oper = NULL;
 345
 346         /* don't check HE if we associated as non-HE station */
 347         if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
 348             !ieee80211_get_he_sta_cap(sband))
 349                 he_oper = NULL;
 350
 351         if (WARN_ON_ONCE(!sta))
 352                 return -EINVAL;
 353
 354         /*
 355          * if bss configuration changed store the new one -
 356          * this may be applicable even if channel is identical
 357          */
 358         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 359         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 360                 *changed |= BSS_CHANGED_HT;
 361                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 362         }
 363
 364         /* calculate new channel (type) based on HT/VHT/HE operation IEs */
 365         flags = ieee80211_determine_chantype(sdata, sband, chan,
 366                                              ht_oper, vht_oper, he_oper,
 367                                              &chandef, true);
 368
 369         /*
 370          * Downgrade the new channel if we associated with restricted
 371          * capabilities. For example, if we associated as a 20 MHz STA
 372          * to a 40 MHz AP (due to regulatory, capabilities or config
 373          * reasons) then switching to a 40 MHz channel now won't do us
 374          * any good -- we couldn't use it with the AP.
 375          */
 376         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 377             chandef.width == NL80211_CHAN_WIDTH_80P80)
 378                 flags |= ieee80211_chandef_downgrade(&chandef);
 379         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 380             chandef.width == NL80211_CHAN_WIDTH_160)
 381                 flags |= ieee80211_chandef_downgrade(&chandef);
 382         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 383             chandef.width > NL80211_CHAN_WIDTH_20)
 384                 flags |= ieee80211_chandef_downgrade(&chandef);
 385
 386         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 387                 return 0;
 388
 389         sdata_info(sdata,
 390                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 391                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 392                    chandef.center_freq1, chandef.center_freq2);
 393
 394         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 395                                       IEEE80211_STA_DISABLE_VHT |
 396                                       IEEE80211_STA_DISABLE_40MHZ |
 397                                       IEEE80211_STA_DISABLE_80P80MHZ |
 398                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 399             !cfg80211_chandef_valid(&chandef)) {
 400                 sdata_info(sdata,
 401                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 402                            ifmgd->bssid);
 403                 return -EINVAL;
 404         }
 405
 406         switch (chandef.width) {
 407         case NL80211_CHAN_WIDTH_20_NOHT:
 408         case NL80211_CHAN_WIDTH_20:
 409                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 410                 break;
 411         case NL80211_CHAN_WIDTH_40:
 412                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 413                 break;
 414         case NL80211_CHAN_WIDTH_80:
 415                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 416                 break;
 417         case NL80211_CHAN_WIDTH_80P80:
 418         case NL80211_CHAN_WIDTH_160:
 419                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 420                 break;
 421         default:
 422                 return -EINVAL;
 423         }
 424
 425         if (new_sta_bw > sta->cur_max_bandwidth)
 426                 new_sta_bw = sta->cur_max_bandwidth;
 427
 428         if (new_sta_bw < sta->sta.bandwidth) {
 429                 sta->sta.bandwidth = new_sta_bw;
 430                 rate_control_rate_update(local, sband, sta,
 431                                          IEEE80211_RC_BW_CHANGED);
 432         }
 433
 434         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 435         if (ret) {
 436                 sdata_info(sdata,
 437                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 438                            ifmgd->bssid);
 439                 return ret;
 440         }
 441
 442         if (new_sta_bw > sta->sta.bandwidth) {
 443                 sta->sta.bandwidth = new_sta_bw;
 444                 rate_control_rate_update(local, sband, sta,
 445                                          IEEE80211_RC_BW_CHANGED);
 446         }
 447
 448         return 0;
 449 }
 450
 451 /* frame sending functions */
 452
 453 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 454                                 struct sk_buff *skb, u8 ap_ht_param,
 455                                 struct ieee80211_supported_band *sband,
 456                                 struct ieee80211_channel *channel,
 457                                 enum ieee80211_smps_mode smps)
 458 {
 459         u8 *pos;
 460         u32 flags = channel->flags;
 461         u16 cap;
 462         struct ieee80211_sta_ht_cap ht_cap;
 463
 464         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 465
 466         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 467         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 468
 469         /* determine capability flags */
 470         cap = ht_cap.cap;
 471
 472         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 473         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 474                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 475                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 476                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 477                 }
 478                 break;
 479         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 480                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 481                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 482                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 483                 }
 484                 break;
 485         }
 486
 487         /*
 488          * If 40 MHz was disabled associate as though we weren't
 489          * capable of 40 MHz -- some broken APs will never fall
 490          * back to trying to transmit in 20 MHz.
 491          */
 492         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 493                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 494                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 495         }
 496
 497         /* set SM PS mode properly */
 498         cap &= ~IEEE80211_HT_CAP_SM_PS;
 499         switch (smps) {
 500         case IEEE80211_SMPS_AUTOMATIC:
 501         case IEEE80211_SMPS_NUM_MODES:
 502                 WARN_ON(1);
 503                 /* fall through */
 504         case IEEE80211_SMPS_OFF:
 505                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 506                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 507                 break;
 508         case IEEE80211_SMPS_STATIC:
 509                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 510                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 511                 break;
 512         case IEEE80211_SMPS_DYNAMIC:
 513                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 514                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 515                 break;
 516         }
 517
 518         /* reserve and fill IE */
 519         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 520         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 521 }
 522
 523 /* This function determines vht capability flags for the association
 524  * and builds the IE.
 525  * Note - the function may set the owner of the MU-MIMO capability
 526  */
 527 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 528                                  struct sk_buff *skb,
 529                                  struct ieee80211_supported_band *sband,
 530                                  struct ieee80211_vht_cap *ap_vht_cap)
 531 {
 532         struct ieee80211_local *local = sdata->local;
 533         u8 *pos;
 534         u32 cap;
 535         struct ieee80211_sta_vht_cap vht_cap;
 536         u32 mask, ap_bf_sts, our_bf_sts;
 537
 538         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 539
 540         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 541         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 542
 543         /* determine capability flags */
 544         cap = vht_cap.cap;
 545
 546         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 547                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 548
 549                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 550                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 551                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 552                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 553         }
 554
 555         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 556                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 557                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 558         }
 559
 560         /*
 561          * Some APs apparently get confused if our capabilities are better
 562          * than theirs, so restrict what we advertise in the assoc request.
 563          */
 564         if (!(ap_vht_cap->vht_cap_info &
 565                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 566                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 567                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 568         else if (!(ap_vht_cap->vht_cap_info &
 569                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 570                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 571
 572         /*
 573          * If some other vif is using the MU-MIMO capablity we cannot associate
 574          * using MU-MIMO - this will lead to contradictions in the group-id
 575          * mechanism.
 576          * Ownership is defined since association request, in order to avoid
 577          * simultaneous associations with MU-MIMO.
 578          */
 579         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 580                 bool disable_mu_mimo = false;
 581                 struct ieee80211_sub_if_data *other;
 582
 583                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 584                         if (other->vif.mu_mimo_owner) {
 585                                 disable_mu_mimo = true;
 586                                 break;
 587                         }
 588                 }
 589                 if (disable_mu_mimo)
 590                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 591                 else
 592                         sdata->vif.mu_mimo_owner = true;
 593         }
 594
 595         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 596
 597         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 598         our_bf_sts = cap & mask;
 599
 600         if (ap_bf_sts < our_bf_sts) {
 601                 cap &= ~mask;
 602                 cap |= ap_bf_sts;
 603         }
 604
 605         /* reserve and fill IE */
 606         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 607         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 608 }
 609
 610 /* This function determines HE capability flags for the association
 611  * and builds the IE.
 612  */
 613 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
 614                                 struct sk_buff *skb,
 615                                 struct ieee80211_supported_band *sband)
 616 {
 617         u8 *pos;
 618         const struct ieee80211_sta_he_cap *he_cap = NULL;
 619         u8 he_cap_size;
 620
 621         he_cap = ieee80211_get_he_sta_cap(sband);
 622         if (!he_cap)
 623                 return;
 624
 625         /*
 626          * TODO: the 1 added is because this temporarily is under the EXTENSION
 627          * IE. Get rid of it when it moves.
 628          */
 629         he_cap_size =
 630                 2 + 1 + sizeof(he_cap->he_cap_elem) +
 631                 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
 632                 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
 633                                       he_cap->he_cap_elem.phy_cap_info);
 634         pos = skb_put(skb, he_cap_size);
 635         ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
 636 }
 637
 638 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 639 {
 640         struct ieee80211_local *local = sdata->local;
 641         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 642         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 643         struct sk_buff *skb;
 644         struct ieee80211_mgmt *mgmt;
 645         u8 *pos, qos_info;
 646         size_t offset = 0, noffset;
 647         int i, count, rates_len, supp_rates_len, shift;
 648         u16 capab;
 649         struct ieee80211_supported_band *sband;
 650         struct ieee80211_chanctx_conf *chanctx_conf;
 651         struct ieee80211_channel *chan;
 652         u32 rates = 0;
 653
 654         sdata_assert_lock(sdata);
 655
 656         rcu_read_lock();
 657         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 658         if (WARN_ON(!chanctx_conf)) {
 659                 rcu_read_unlock();
 660                 return;
 661         }
 662         chan = chanctx_conf->def.chan;
 663         rcu_read_unlock();
 664         sband = local->hw.wiphy->bands[chan->band];
 665         shift = ieee80211_vif_get_shift(&sdata->vif);
 666
 667         if (assoc_data->supp_rates_len) {
 668                 /*
 669                  * Get all rates supported by the device and the AP as
 670                  * some APs don't like getting a superset of their rates
 671                  * in the association request (e.g. D-Link DAP 1353 in
 672                  * b-only mode)...
 673                  */
 674                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 675                                                      assoc_data->supp_rates,
 676                                                      assoc_data->supp_rates_len,
 677                                                      &rates);
 678         } else {
 679                 /*
 680                  * In case AP not provide any supported rates information
 681                  * before association, we send information element(s) with
 682                  * all rates that we support.
 683                  */
 684                 rates_len = 0;
 685                 for (i = 0; i < sband->n_bitrates; i++) {
 686                         rates |= BIT(i);
 687                         rates_len++;
 688                 }
 689         }
 690
 691         skb = alloc_skb(local->hw.extra_tx_headroom +
 692                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 693                         2 + assoc_data->ssid_len + /* SSID */
 694                         4 + rates_len + /* (extended) rates */
 695                         4 + /* power capability */
 696                         2 + 2 * sband->n_channels + /* supported channels */
 697                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 698                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 699                         2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
 700                                 sizeof(struct ieee80211_he_mcs_nss_supp) +
 701                                 IEEE80211_HE_PPE_THRES_MAX_LEN +
 702                         assoc_data->ie_len + /* extra IEs */
 703                         (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
 704                         9, /* WMM */
 705                         GFP_KERNEL);
 706         if (!skb)
 707                 return;
 708
 709         skb_reserve(skb, local->hw.extra_tx_headroom);
 710
 711         capab = WLAN_CAPABILITY_ESS;
 712
 713         if (sband->band == NL80211_BAND_2GHZ) {
 714                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 715                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 716         }
 717
 718         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 719                 capab |= WLAN_CAPABILITY_PRIVACY;
 720
 721         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 722             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 723                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 724
 725         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 726                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 727
 728         mgmt = skb_put_zero(skb, 24);
 729         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 730         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 731         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 732
 733         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 734                 skb_put(skb, 10);
 735                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 736                                                   IEEE80211_STYPE_REASSOC_REQ);
 737                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 738                 mgmt->u.reassoc_req.listen_interval =
 739                                 cpu_to_le16(local->hw.conf.listen_interval);
 740                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 741                        ETH_ALEN);
 742         } else {
 743                 skb_put(skb, 4);
 744                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 745                                                   IEEE80211_STYPE_ASSOC_REQ);
 746                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 747                 mgmt->u.assoc_req.listen_interval =
 748                                 cpu_to_le16(local->hw.conf.listen_interval);
 749         }
 750
 751         /* SSID */
 752         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 753         *pos++ = WLAN_EID_SSID;
 754         *pos++ = assoc_data->ssid_len;
 755         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 756
 757         /* add all rates which were marked to be used above */
 758         supp_rates_len = rates_len;
 759         if (supp_rates_len > 8)
 760                 supp_rates_len = 8;
 761
 762         pos = skb_put(skb, supp_rates_len + 2);
 763         *pos++ = WLAN_EID_SUPP_RATES;
 764         *pos++ = supp_rates_len;
 765
 766         count = 0;
 767         for (i = 0; i < sband->n_bitrates; i++) {
 768                 if (BIT(i) & rates) {
 769                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 770                                                 5 * (1 << shift));
 771                         *pos++ = (u8) rate;
 772                         if (++count == 8)
 773                                 break;
 774                 }
 775         }
 776
 777         if (rates_len > count) {
 778                 pos = skb_put(skb, rates_len - count + 2);
 779                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 780                 *pos++ = rates_len - count;
 781
 782                 for (i++; i < sband->n_bitrates; i++) {
 783                         if (BIT(i) & rates) {
 784                                 int rate;
 785                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 786                                                     5 * (1 << shift));
 787                                 *pos++ = (u8) rate;
 788                         }
 789                 }
 790         }
 791
 792         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 793             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 794                 pos = skb_put(skb, 4);
 795                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 796                 *pos++ = 2;
 797                 *pos++ = 0; /* min tx power */
 798                  /* max tx power */
 799                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 800         }
 801
 802         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 803                 /* TODO: get this in reg domain format */
 804                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 805                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 806                 *pos++ = 2 * sband->n_channels;
 807                 for (i = 0; i < sband->n_channels; i++) {
 808                         *pos++ = ieee80211_frequency_to_channel(
 809                                         sband->channels[i].center_freq);
 810                         *pos++ = 1; /* one channel in the subband*/
 811                 }
 812         }
 813
 814         /* if present, add any custom IEs that go before HT */
 815         if (assoc_data->ie_len) {
 816                 static const u8 before_ht[] = {
 817                         WLAN_EID_SSID,
 818                         WLAN_EID_SUPP_RATES,
 819                         WLAN_EID_EXT_SUPP_RATES,
 820                         WLAN_EID_PWR_CAPABILITY,
 821                         WLAN_EID_SUPPORTED_CHANNELS,
 822                         WLAN_EID_RSN,
 823                         WLAN_EID_QOS_CAPA,
 824                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 825                         WLAN_EID_MOBILITY_DOMAIN,
 826                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 827                         WLAN_EID_RIC_DATA,              /* reassoc only */
 828                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 829                 };
 830                 static const u8 after_ric[] = {
 831                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 832                         WLAN_EID_HT_CAPABILITY,
 833                         WLAN_EID_BSS_COEX_2040,
 834                         /* luckily this is almost always there */
 835                         WLAN_EID_EXT_CAPABILITY,
 836                         WLAN_EID_QOS_TRAFFIC_CAPA,
 837                         WLAN_EID_TIM_BCAST_REQ,
 838                         WLAN_EID_INTERWORKING,
 839                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
 840                         WLAN_EID_VHT_CAPABILITY,
 841                         WLAN_EID_OPMODE_NOTIF,
 842                 };
 843
 844                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 845                                                  assoc_data->ie_len,
 846                                                  before_ht,
 847                                                  ARRAY_SIZE(before_ht),
 848                                                  after_ric,
 849                                                  ARRAY_SIZE(after_ric),
 850                                                  offset);
 851                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 852                 offset = noffset;
 853         }
 854
 855         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 856                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 857                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 858
 859         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 860                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 861                                     sband, chan, sdata->smps_mode);
 862
 863         /* if present, add any custom IEs that go before VHT */
 864         if (assoc_data->ie_len) {
 865                 static const u8 before_vht[] = {
 866                         /*
 867                          * no need to list the ones split off before HT
 868                          * or generated here
 869                          */
 870                         WLAN_EID_BSS_COEX_2040,
 871                         WLAN_EID_EXT_CAPABILITY,
 872                         WLAN_EID_QOS_TRAFFIC_CAPA,
 873                         WLAN_EID_TIM_BCAST_REQ,
 874                         WLAN_EID_INTERWORKING,
 875                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
 876                 };
 877
 878                 /* RIC already taken above, so no need to handle here anymore */
 879                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 880                                              before_vht, ARRAY_SIZE(before_vht),
 881                                              offset);
 882                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 883                 offset = noffset;
 884         }
 885
 886         /* if present, add any custom IEs that go before HE */
 887         if (assoc_data->ie_len) {
 888                 static const u8 before_he[] = {
 889                         /*
 890                          * no need to list the ones split off before VHT
 891                          * or generated here
 892                          */
 893                         WLAN_EID_OPMODE_NOTIF,
 894                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
 895                         /* 11ai elements */
 896                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
 897                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
 898                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
 899                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
 900                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
 901                         /* TODO: add 11ah/11aj/11ak elements */
 902                 };
 903
 904                 /* RIC already taken above, so no need to handle here anymore */
 905                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 906                                              before_he, ARRAY_SIZE(before_he),
 907                                              offset);
 908                 pos = skb_put(skb, noffset - offset);
 909                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 910                 offset = noffset;
 911         }
 912
 913         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 914                 ieee80211_add_vht_ie(sdata, skb, sband,
 915                                      &assoc_data->ap_vht_cap);
 916
 917         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
 918                 ieee80211_add_he_ie(sdata, skb, sband);
 919
 920         /* if present, add any custom non-vendor IEs that go after HE */
 921         if (assoc_data->ie_len) {
 922                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 923                                                     assoc_data->ie_len,
 924                                                     offset);
 925                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 926                 offset = noffset;
 927         }
 928
 929         if (assoc_data->wmm) {
 930                 if (assoc_data->uapsd) {
 931                         qos_info = ifmgd->uapsd_queues;
 932                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 933                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 934                 } else {
 935                         qos_info = 0;
 936                 }
 937
 938                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 939         }
 940
 941         /* add any remaining custom (i.e. vendor specific here) IEs */
 942         if (assoc_data->ie_len) {
 943                 noffset = assoc_data->ie_len;
 944                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 945         }
 946
 947         if (assoc_data->fils_kek_len &&
 948             fils_encrypt_assoc_req(skb, assoc_data) < 0) {
 949                 dev_kfree_skb(skb);
 950                 return;
 951         }
 952
 953         drv_mgd_prepare_tx(local, sdata, 0);
 954
 955         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 956         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 957                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 958                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 959         ieee80211_tx_skb(sdata, skb);
 960 }
 961
 962 void ieee80211_send_pspoll(struct ieee80211_local *local,
 963                            struct ieee80211_sub_if_data *sdata)
 964 {
 965         struct ieee80211_pspoll *pspoll;
 966         struct sk_buff *skb;
 967
 968         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 969         if (!skb)
 970                 return;
 971
 972         pspoll = (struct ieee80211_pspoll *) skb->data;
 973         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 974
 975         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 976         ieee80211_tx_skb(sdata, skb);
 977 }
 978
 979 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 980                              struct ieee80211_sub_if_data *sdata,
 981                              bool powersave)
 982 {
 983         struct sk_buff *skb;
 984         struct ieee80211_hdr_3addr *nullfunc;
 985         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 986
 987         /* Don't send NDPs when STA is connected HE */
 988         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
 989             !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
 990                 return;
 991
 992         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
 993                 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
 994         if (!skb)
 995                 return;
 996
 997         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 998         if (powersave)
 999                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1000
1001         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1002                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1003
1004         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1005                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1006
1007         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1008                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1009
1010         ieee80211_tx_skb(sdata, skb);
1011 }
1012
1013 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1014                                           struct ieee80211_sub_if_data *sdata)
1015 {
1016         struct sk_buff *skb;
1017         struct ieee80211_hdr *nullfunc;
1018         __le16 fc;
1019
1020         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1021                 return;
1022
1023         /* Don't send NDPs when connected HE */
1024         if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1025                 return;
1026
1027         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1028         if (!skb)
1029                 return;
1030
1031         skb_reserve(skb, local->hw.extra_tx_headroom);
1032
1033         nullfunc = skb_put_zero(skb, 30);
1034         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1035                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1036         nullfunc->frame_control = fc;
1037         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1038         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1039         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1040         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1041
1042         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1043         ieee80211_tx_skb(sdata, skb);
1044 }
1045
1046 /* spectrum management related things */
1047 static void ieee80211_chswitch_work(struct work_struct *work)
1048 {
1049         struct ieee80211_sub_if_data *sdata =
1050                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1051         struct ieee80211_local *local = sdata->local;
1052         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1053         int ret;
1054
1055         if (!ieee80211_sdata_running(sdata))
1056                 return;
1057
1058         sdata_lock(sdata);
1059         mutex_lock(&local->mtx);
1060         mutex_lock(&local->chanctx_mtx);
1061
1062         if (!ifmgd->associated)
1063                 goto out;
1064
1065         if (!sdata->vif.csa_active)
1066                 goto out;
1067
1068         /*
1069          * using reservation isn't immediate as it may be deferred until later
1070          * with multi-vif. once reservation is complete it will re-schedule the
1071          * work with no reserved_chanctx so verify chandef to check if it
1072          * completed successfully
1073          */
1074
1075         if (sdata->reserved_chanctx) {
1076                 /*
1077                  * with multi-vif csa driver may call ieee80211_csa_finish()
1078                  * many times while waiting for other interfaces to use their
1079                  * reservations
1080                  */
1081                 if (sdata->reserved_ready)
1082                         goto out;
1083
1084                 ret = ieee80211_vif_use_reserved_context(sdata);
1085                 if (ret) {
1086                         sdata_info(sdata,
1087                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1088                                    ret);
1089                         ieee80211_queue_work(&sdata->local->hw,
1090                                              &ifmgd->csa_connection_drop_work);
1091                         goto out;
1092                 }
1093
1094                 goto out;
1095         }
1096
1097         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1098                                         &sdata->csa_chandef)) {
1099                 sdata_info(sdata,
1100                            "failed to finalize channel switch, disconnecting\n");
1101                 ieee80211_queue_work(&sdata->local->hw,
1102                                      &ifmgd->csa_connection_drop_work);
1103                 goto out;
1104         }
1105
1106         /* XXX: shouldn't really modify cfg80211-owned data! */
1107         ifmgd->associated->channel = sdata->csa_chandef.chan;
1108
1109         ifmgd->csa_waiting_bcn = true;
1110
1111         ieee80211_sta_reset_beacon_monitor(sdata);
1112         ieee80211_sta_reset_conn_monitor(sdata);
1113
1114 out:
1115         mutex_unlock(&local->chanctx_mtx);
1116         mutex_unlock(&local->mtx);
1117         sdata_unlock(sdata);
1118 }
1119
1120 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1121 {
1122         struct ieee80211_local *local = sdata->local;
1123         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1124         int ret;
1125
1126         sdata_assert_lock(sdata);
1127
1128         WARN_ON(!sdata->vif.csa_active);
1129
1130         if (sdata->csa_block_tx) {
1131                 ieee80211_wake_vif_queues(local, sdata,
1132                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1133                 sdata->csa_block_tx = false;
1134         }
1135
1136         sdata->vif.csa_active = false;
1137         ifmgd->csa_waiting_bcn = false;
1138
1139         ret = drv_post_channel_switch(sdata);
1140         if (ret) {
1141                 sdata_info(sdata,
1142                            "driver post channel switch failed, disconnecting\n");
1143                 ieee80211_queue_work(&local->hw,
1144                                      &ifmgd->csa_connection_drop_work);
1145                 return;
1146         }
1147
1148         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1149 }
1150
1151 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1152 {
1153         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1154         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1155
1156         trace_api_chswitch_done(sdata, success);
1157         if (!success) {
1158                 sdata_info(sdata,
1159                            "driver channel switch failed, disconnecting\n");
1160                 ieee80211_queue_work(&sdata->local->hw,
1161                                      &ifmgd->csa_connection_drop_work);
1162         } else {
1163                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1164         }
1165 }
1166 EXPORT_SYMBOL(ieee80211_chswitch_done);
1167
1168 static void ieee80211_chswitch_timer(struct timer_list *t)
1169 {
1170         struct ieee80211_sub_if_data *sdata =
1171                 from_timer(sdata, t, u.mgd.chswitch_timer);
1172
1173         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1174 }
1175
1176 static void
1177 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1178                                  u64 timestamp, u32 device_timestamp,
1179                                  struct ieee802_11_elems *elems,
1180                                  bool beacon)
1181 {
1182         struct ieee80211_local *local = sdata->local;
1183         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1184         struct cfg80211_bss *cbss = ifmgd->associated;
1185         struct ieee80211_chanctx_conf *conf;
1186         struct ieee80211_chanctx *chanctx;
1187         enum nl80211_band current_band;
1188         struct ieee80211_csa_ie csa_ie;
1189         struct ieee80211_channel_switch ch_switch;
1190         int res;
1191
1192         sdata_assert_lock(sdata);
1193
1194         if (!cbss)
1195                 return;
1196
1197         if (local->scanning)
1198                 return;
1199
1200         /* disregard subsequent announcements if we are already processing */
1201         if (sdata->vif.csa_active)
1202                 return;
1203
1204         current_band = cbss->channel->band;
1205         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1206                                            ifmgd->flags,
1207                                            ifmgd->associated->bssid, &csa_ie);
1208         if (res < 0)
1209                 ieee80211_queue_work(&local->hw,
1210                                      &ifmgd->csa_connection_drop_work);
1211         if (res)
1212                 return;
1213
1214         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1215                                      IEEE80211_CHAN_DISABLED)) {
1216                 sdata_info(sdata,
1217                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1218                            ifmgd->associated->bssid,
1219                            csa_ie.chandef.chan->center_freq,
1220                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1221                            csa_ie.chandef.center_freq2);
1222                 ieee80211_queue_work(&local->hw,
1223                                      &ifmgd->csa_connection_drop_work);
1224                 return;
1225         }
1226
1227         if (cfg80211_chandef_identical(&csa_ie.chandef,
1228                                        &sdata->vif.bss_conf.chandef)) {
1229                 if (ifmgd->csa_ignored_same_chan)
1230                         return;
1231                 sdata_info(sdata,
1232                            "AP %pM tries to chanswitch to same channel, ignore\n",
1233                            ifmgd->associated->bssid);
1234                 ifmgd->csa_ignored_same_chan = true;
1235                 return;
1236         }
1237
1238         /*
1239          * Drop all TDLS peers - either we disconnect or move to a different
1240          * channel from this point on. There's no telling what our peer will do.
1241          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1242          * have an incompatible wider chandef.
1243          */
1244         ieee80211_teardown_tdls_peers(sdata);
1245
1246         mutex_lock(&local->mtx);
1247         mutex_lock(&local->chanctx_mtx);
1248         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1249                                          lockdep_is_held(&local->chanctx_mtx));
1250         if (!conf) {
1251                 sdata_info(sdata,
1252                            "no channel context assigned to vif?, disconnecting\n");
1253                 goto drop_connection;
1254         }
1255
1256         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1257
1258         if (local->use_chanctx &&
1259             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1260                 sdata_info(sdata,
1261                            "driver doesn't support chan-switch with channel contexts\n");
1262                 goto drop_connection;
1263         }
1264
1265         ch_switch.timestamp = timestamp;
1266         ch_switch.device_timestamp = device_timestamp;
1267         ch_switch.block_tx = csa_ie.mode;
1268         ch_switch.chandef = csa_ie.chandef;
1269         ch_switch.count = csa_ie.count;
1270
1271         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1272                 sdata_info(sdata,
1273                            "preparing for channel switch failed, disconnecting\n");
1274                 goto drop_connection;
1275         }
1276
1277         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1278                                             chanctx->mode, false);
1279         if (res) {
1280                 sdata_info(sdata,
1281                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1282                            res);
1283                 goto drop_connection;
1284         }
1285         mutex_unlock(&local->chanctx_mtx);
1286
1287         sdata->vif.csa_active = true;
1288         sdata->csa_chandef = csa_ie.chandef;
1289         sdata->csa_block_tx = csa_ie.mode;
1290         ifmgd->csa_ignored_same_chan = false;
1291
1292         if (sdata->csa_block_tx)
1293                 ieee80211_stop_vif_queues(local, sdata,
1294                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1295         mutex_unlock(&local->mtx);
1296
1297         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1298                                           csa_ie.count);
1299
1300         if (local->ops->channel_switch) {
1301                 /* use driver's channel switch callback */
1302                 drv_channel_switch(local, sdata, &ch_switch);
1303                 return;
1304         }
1305
1306         /* channel switch handled in software */
1307         if (csa_ie.count <= 1)
1308                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1309         else
1310                 mod_timer(&ifmgd->chswitch_timer,
1311                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1312                                          cbss->beacon_interval));
1313         return;
1314  drop_connection:
1315         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1316         mutex_unlock(&local->chanctx_mtx);
1317         mutex_unlock(&local->mtx);
1318 }
1319
1320 static bool
1321 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1322                                  struct ieee80211_channel *channel,
1323                                  const u8 *country_ie, u8 country_ie_len,
1324                                  const u8 *pwr_constr_elem,
1325                                  int *chan_pwr, int *pwr_reduction)
1326 {
1327         struct ieee80211_country_ie_triplet *triplet;
1328         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1329         int i, chan_increment;
1330         bool have_chan_pwr = false;
1331
1332         /* Invalid IE */
1333         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1334                 return false;
1335
1336         triplet = (void *)(country_ie + 3);
1337         country_ie_len -= 3;
1338
1339         switch (channel->band) {
1340         default:
1341                 WARN_ON_ONCE(1);
1342                 /* fall through */
1343         case NL80211_BAND_2GHZ:
1344         case NL80211_BAND_60GHZ:
1345                 chan_increment = 1;
1346                 break;
1347         case NL80211_BAND_5GHZ:
1348                 chan_increment = 4;
1349                 break;
1350         }
1351
1352         /* find channel */
1353         while (country_ie_len >= 3) {
1354                 u8 first_channel = triplet->chans.first_channel;
1355
1356                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1357                         goto next;
1358
1359                 for (i = 0; i < triplet->chans.num_channels; i++) {
1360                         if (first_channel + i * chan_increment == chan) {
1361                                 have_chan_pwr = true;
1362                                 *chan_pwr = triplet->chans.max_power;
1363                                 break;
1364                         }
1365                 }
1366                 if (have_chan_pwr)
1367                         break;
1368
1369  next:
1370                 triplet++;
1371                 country_ie_len -= 3;
1372         }
1373
1374         if (have_chan_pwr && pwr_constr_elem)
1375                 *pwr_reduction = *pwr_constr_elem;
1376         else
1377                 *pwr_reduction = 0;
1378
1379         return have_chan_pwr;
1380 }
1381
1382 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1383                                       struct ieee80211_channel *channel,
1384                                       const u8 *cisco_dtpc_ie,
1385                                       int *pwr_level)
1386 {
1387         /* From practical testing, the first data byte of the DTPC element
1388          * seems to contain the requested dBm level, and the CLI on Cisco
1389          * APs clearly state the range is -127 to 127 dBm, which indicates
1390          * a signed byte, although it seemingly never actually goes negative.
1391          * The other byte seems to always be zero.
1392          */
1393         *pwr_level = (__s8)cisco_dtpc_ie[4];
1394 }
1395
1396 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1397                                        struct ieee80211_channel *channel,
1398                                        struct ieee80211_mgmt *mgmt,
1399                                        const u8 *country_ie, u8 country_ie_len,
1400                                        const u8 *pwr_constr_ie,
1401                                        const u8 *cisco_dtpc_ie)
1402 {
1403         bool has_80211h_pwr = false, has_cisco_pwr = false;
1404         int chan_pwr = 0, pwr_reduction_80211h = 0;
1405         int pwr_level_cisco, pwr_level_80211h;
1406         int new_ap_level;
1407         __le16 capab = mgmt->u.probe_resp.capab_info;
1408
1409         if (country_ie &&
1410             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1411              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1412                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1413                         sdata, channel, country_ie, country_ie_len,
1414                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1415                 pwr_level_80211h =
1416                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1417         }
1418
1419         if (cisco_dtpc_ie) {
1420                 ieee80211_find_cisco_dtpc(
1421                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1422                 has_cisco_pwr = true;
1423         }
1424
1425         if (!has_80211h_pwr && !has_cisco_pwr)
1426                 return 0;
1427
1428         /* If we have both 802.11h and Cisco DTPC, apply both limits
1429          * by picking the smallest of the two power levels advertised.
1430          */
1431         if (has_80211h_pwr &&
1432             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1433                 new_ap_level = pwr_level_80211h;
1434
1435                 if (sdata->ap_power_level == new_ap_level)
1436                         return 0;
1437
1438                 sdata_dbg(sdata,
1439                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1440                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1441                           sdata->u.mgd.bssid);
1442         } else {  /* has_cisco_pwr is always true here. */
1443                 new_ap_level = pwr_level_cisco;
1444
1445                 if (sdata->ap_power_level == new_ap_level)
1446                         return 0;
1447
1448                 sdata_dbg(sdata,
1449                           "Limiting TX power to %d dBm as advertised by %pM\n",
1450                           pwr_level_cisco, sdata->u.mgd.bssid);
1451         }
1452
1453         sdata->ap_power_level = new_ap_level;
1454         if (__ieee80211_recalc_txpower(sdata))
1455                 return BSS_CHANGED_TXPOWER;
1456         return 0;
1457 }
1458
1459 /* powersave */
1460 static void ieee80211_enable_ps(struct ieee80211_local *local,
1461                                 struct ieee80211_sub_if_data *sdata)
1462 {
1463         struct ieee80211_conf *conf = &local->hw.conf;
1464
1465         /*
1466          * If we are scanning right now then the parameters will
1467          * take effect when scan finishes.
1468          */
1469         if (local->scanning)
1470                 return;
1471
1472         if (conf->dynamic_ps_timeout > 0 &&
1473             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1474                 mod_timer(&local->dynamic_ps_timer, jiffies +
1475                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1476         } else {
1477                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1478                         ieee80211_send_nullfunc(local, sdata, true);
1479
1480                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1481                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1482                         return;
1483
1484                 conf->flags |= IEEE80211_CONF_PS;
1485                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1486         }
1487 }
1488
1489 static void ieee80211_change_ps(struct ieee80211_local *local)
1490 {
1491         struct ieee80211_conf *conf = &local->hw.conf;
1492
1493         if (local->ps_sdata) {
1494                 ieee80211_enable_ps(local, local->ps_sdata);
1495         } else if (conf->flags & IEEE80211_CONF_PS) {
1496                 conf->flags &= ~IEEE80211_CONF_PS;
1497                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1498                 del_timer_sync(&local->dynamic_ps_timer);
1499                 cancel_work_sync(&local->dynamic_ps_enable_work);
1500         }
1501 }
1502
1503 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1504 {
1505         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1506         struct sta_info *sta = NULL;
1507         bool authorized = false;
1508
1509         if (!mgd->powersave)
1510                 return false;
1511
1512         if (mgd->broken_ap)
1513                 return false;
1514
1515         if (!mgd->associated)
1516                 return false;
1517
1518         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1519                 return false;
1520
1521         if (!mgd->have_beacon)
1522                 return false;
1523
1524         rcu_read_lock();
1525         sta = sta_info_get(sdata, mgd->bssid);
1526         if (sta)
1527                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1528         rcu_read_unlock();
1529
1530         return authorized;
1531 }
1532
1533 /* need to hold RTNL or interface lock */
1534 void ieee80211_recalc_ps(struct ieee80211_local *local)
1535 {
1536         struct ieee80211_sub_if_data *sdata, *found = NULL;
1537         int count = 0;
1538         int timeout;
1539
1540         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1541                 local->ps_sdata = NULL;
1542                 return;
1543         }
1544
1545         list_for_each_entry(sdata, &local->interfaces, list) {
1546                 if (!ieee80211_sdata_running(sdata))
1547                         continue;
1548                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1549                         /* If an AP vif is found, then disable PS
1550                          * by setting the count to zero thereby setting
1551                          * ps_sdata to NULL.
1552                          */
1553                         count = 0;
1554                         break;
1555                 }
1556                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1557                         continue;
1558                 found = sdata;
1559                 count++;
1560         }
1561
1562         if (count == 1 && ieee80211_powersave_allowed(found)) {
1563                 u8 dtimper = found->u.mgd.dtim_period;
1564
1565                 timeout = local->dynamic_ps_forced_timeout;
1566                 if (timeout < 0)
1567                         timeout = 100;
1568                 local->hw.conf.dynamic_ps_timeout = timeout;
1569
1570                 /* If the TIM IE is invalid, pretend the value is 1 */
1571                 if (!dtimper)
1572                         dtimper = 1;
1573
1574                 local->hw.conf.ps_dtim_period = dtimper;
1575                 local->ps_sdata = found;
1576         } else {
1577                 local->ps_sdata = NULL;
1578         }
1579
1580         ieee80211_change_ps(local);
1581 }
1582
1583 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1584 {
1585         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1586
1587         if (sdata->vif.bss_conf.ps != ps_allowed) {
1588                 sdata->vif.bss_conf.ps = ps_allowed;
1589                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1590         }
1591 }
1592
1593 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1594 {
1595         struct ieee80211_local *local =
1596                 container_of(work, struct ieee80211_local,
1597                              dynamic_ps_disable_work);
1598
1599         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1600                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1601                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1602         }
1603
1604         ieee80211_wake_queues_by_reason(&local->hw,
1605                                         IEEE80211_MAX_QUEUE_MAP,
1606                                         IEEE80211_QUEUE_STOP_REASON_PS,
1607                                         false);
1608 }
1609
1610 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1611 {
1612         struct ieee80211_local *local =
1613                 container_of(work, struct ieee80211_local,
1614                              dynamic_ps_enable_work);
1615         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1616         struct ieee80211_if_managed *ifmgd;
1617         unsigned long flags;
1618         int q;
1619
1620         /* can only happen when PS was just disabled anyway */
1621         if (!sdata)
1622                 return;
1623
1624         ifmgd = &sdata->u.mgd;
1625
1626         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1627                 return;
1628
1629         if (local->hw.conf.dynamic_ps_timeout > 0) {
1630                 /* don't enter PS if TX frames are pending */
1631                 if (drv_tx_frames_pending(local)) {
1632                         mod_timer(&local->dynamic_ps_timer, jiffies +
1633                                   msecs_to_jiffies(
1634                                   local->hw.conf.dynamic_ps_timeout));
1635                         return;
1636                 }
1637
1638                 /*
1639                  * transmission can be stopped by others which leads to
1640                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1641                  * is not the actual idle state.
1642                  */
1643                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1644                 for (q = 0; q < local->hw.queues; q++) {
1645                         if (local->queue_stop_reasons[q]) {
1646                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1647                                                        flags);
1648                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1649                                           msecs_to_jiffies(
1650                                           local->hw.conf.dynamic_ps_timeout));
1651                                 return;
1652                         }
1653                 }
1654                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1655         }
1656
1657         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1658             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1659                 if (drv_tx_frames_pending(local)) {
1660                         mod_timer(&local->dynamic_ps_timer, jiffies +
1661                                   msecs_to_jiffies(
1662                                   local->hw.conf.dynamic_ps_timeout));
1663                 } else {
1664                         ieee80211_send_nullfunc(local, sdata, true);
1665                         /* Flush to get the tx status of nullfunc frame */
1666                         ieee80211_flush_queues(local, sdata, false);
1667                 }
1668         }
1669
1670         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1671               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1672             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1673                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1674                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1675                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1676         }
1677 }
1678
1679 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1680 {
1681         struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1682
1683         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1684 }
1685
1686 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1687 {
1688         struct delayed_work *delayed_work = to_delayed_work(work);
1689         struct ieee80211_sub_if_data *sdata =
1690                 container_of(delayed_work, struct ieee80211_sub_if_data,
1691                              dfs_cac_timer_work);
1692         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1693
1694         mutex_lock(&sdata->local->mtx);
1695         if (sdata->wdev.cac_started) {
1696                 ieee80211_vif_release_channel(sdata);
1697                 cfg80211_cac_event(sdata->dev, &chandef,
1698                                    NL80211_RADAR_CAC_FINISHED,
1699                                    GFP_KERNEL);
1700         }
1701         mutex_unlock(&sdata->local->mtx);
1702 }
1703
1704 static bool
1705 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1706 {
1707         struct ieee80211_local *local = sdata->local;
1708         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1709         bool ret = false;
1710         int ac;
1711
1712         if (local->hw.queues < IEEE80211_NUM_ACS)
1713                 return false;
1714
1715         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1716                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1717                 int non_acm_ac;
1718                 unsigned long now = jiffies;
1719
1720                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1721                     tx_tspec->admitted_time &&
1722                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1723                         tx_tspec->consumed_tx_time = 0;
1724                         tx_tspec->time_slice_start = now;
1725
1726                         if (tx_tspec->downgraded)
1727                                 tx_tspec->action =
1728                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1729                 }
1730
1731                 switch (tx_tspec->action) {
1732                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1733                         /* take the original parameters */
1734                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1735                                 sdata_err(sdata,
1736                                           "failed to set TX queue parameters for queue %d\n",
1737                                           ac);
1738                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1739                         tx_tspec->downgraded = false;
1740                         ret = true;
1741                         break;
1742                 case TX_TSPEC_ACTION_DOWNGRADE:
1743                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1744                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1745                                 ret = true;
1746                                 break;
1747                         }
1748                         /* downgrade next lower non-ACM AC */
1749                         for (non_acm_ac = ac + 1;
1750                              non_acm_ac < IEEE80211_NUM_ACS;
1751                              non_acm_ac++)
1752                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1753                                         break;
1754                         /* Usually the loop will result in using BK even if it
1755                          * requires admission control, but such a configuration
1756                          * makes no sense and we have to transmit somehow - the
1757                          * AC selection does the same thing.
1758                          * If we started out trying to downgrade from BK, then
1759                          * the extra condition here might be needed.
1760                          */
1761                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1762                                 non_acm_ac = IEEE80211_AC_BK;
1763                         if (drv_conf_tx(local, sdata, ac,
1764                                         &sdata->tx_conf[non_acm_ac]))
1765                                 sdata_err(sdata,
1766                                           "failed to set TX queue parameters for queue %d\n",
1767                                           ac);
1768                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1769                         ret = true;
1770                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1771                                 tx_tspec->time_slice_start + HZ - now + 1);
1772                         break;
1773                 case TX_TSPEC_ACTION_NONE:
1774                         /* nothing now */
1775                         break;
1776                 }
1777         }
1778
1779         return ret;
1780 }
1781
1782 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1783 {
1784         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1785                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1786 }
1787
1788 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1789 {
1790         struct ieee80211_sub_if_data *sdata;
1791
1792         sdata = container_of(work, struct ieee80211_sub_if_data,
1793                              u.mgd.tx_tspec_wk.work);
1794         ieee80211_sta_handle_tspec_ac_params(sdata);
1795 }
1796
1797 /* MLME */
1798 static bool
1799 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1800                          struct ieee80211_sub_if_data *sdata,
1801                          const u8 *wmm_param, size_t wmm_param_len,
1802                          const struct ieee80211_mu_edca_param_set *mu_edca)
1803 {
1804         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1805         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1806         size_t left;
1807         int count, ac;
1808         const u8 *pos;
1809         u8 uapsd_queues = 0;
1810
1811         if (!local->ops->conf_tx)
1812                 return false;
1813
1814         if (local->hw.queues < IEEE80211_NUM_ACS)
1815                 return false;
1816
1817         if (!wmm_param)
1818                 return false;
1819
1820         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1821                 return false;
1822
1823         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1824                 uapsd_queues = ifmgd->uapsd_queues;
1825
1826         count = wmm_param[6] & 0x0f;
1827         if (count == ifmgd->wmm_last_param_set)
1828                 return false;
1829         ifmgd->wmm_last_param_set = count;
1830
1831         pos = wmm_param + 8;
1832         left = wmm_param_len - 8;
1833
1834         memset(&params, 0, sizeof(params));
1835
1836         sdata->wmm_acm = 0;
1837         for (; left >= 4; left -= 4, pos += 4) {
1838                 int aci = (pos[0] >> 5) & 0x03;
1839                 int acm = (pos[0] >> 4) & 0x01;
1840                 bool uapsd = false;
1841
1842                 switch (aci) {
1843                 case 1: /* AC_BK */
1844                         ac = IEEE80211_AC_BK;
1845                         if (acm)
1846                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1847                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1848                                 uapsd = true;
1849                         params[ac].mu_edca = !!mu_edca;
1850                         if (mu_edca)
1851                                 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
1852                         break;
1853                 case 2: /* AC_VI */
1854                         ac = IEEE80211_AC_VI;
1855                         if (acm)
1856                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1857                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1858                                 uapsd = true;
1859                         params[ac].mu_edca = !!mu_edca;
1860                         if (mu_edca)
1861                                 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
1862                         break;
1863                 case 3: /* AC_VO */
1864                         ac = IEEE80211_AC_VO;
1865                         if (acm)
1866                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1867                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1868                                 uapsd = true;
1869                         params[ac].mu_edca = !!mu_edca;
1870                         if (mu_edca)
1871                                 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
1872                         break;
1873                 case 0: /* AC_BE */
1874                 default:
1875                         ac = IEEE80211_AC_BE;
1876                         if (acm)
1877                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1878                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1879                                 uapsd = true;
1880                         params[ac].mu_edca = !!mu_edca;
1881                         if (mu_edca)
1882                                 params[ac].mu_edca_param_rec = mu_edca->ac_be;
1883                         break;
1884                 }
1885
1886                 params[ac].aifs = pos[0] & 0x0f;
1887
1888                 if (params[ac].aifs < 2) {
1889                         sdata_info(sdata,
1890                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1891                                    params[ac].aifs, aci);
1892                         params[ac].aifs = 2;
1893                 }
1894                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1895                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1896                 params[ac].txop = get_unaligned_le16(pos + 2);
1897                 params[ac].acm = acm;
1898                 params[ac].uapsd = uapsd;
1899
1900                 if (params[ac].cw_min == 0 ||
1901                     params[ac].cw_min > params[ac].cw_max) {
1902                         sdata_info(sdata,
1903                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1904                                    params[ac].cw_min, params[ac].cw_max, aci);
1905                         return false;
1906                 }
1907                 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
1908         }
1909
1910         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1911                 mlme_dbg(sdata,
1912                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1913                          ac, params[ac].acm,
1914                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1915                          params[ac].txop, params[ac].uapsd,
1916                          ifmgd->tx_tspec[ac].downgraded);
1917                 sdata->tx_conf[ac] = params[ac];
1918                 if (!ifmgd->tx_tspec[ac].downgraded &&
1919                     drv_conf_tx(local, sdata, ac, &params[ac]))
1920                         sdata_err(sdata,
1921                                   "failed to set TX queue parameters for AC %d\n",
1922                                   ac);
1923         }
1924
1925         /* enable WMM or activate new settings */
1926         sdata->vif.bss_conf.qos = true;
1927         return true;
1928 }
1929
1930 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1931 {
1932         lockdep_assert_held(&sdata->local->mtx);
1933
1934         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1935         ieee80211_run_deferred_scan(sdata->local);
1936 }
1937
1938 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1939 {
1940         mutex_lock(&sdata->local->mtx);
1941         __ieee80211_stop_poll(sdata);
1942         mutex_unlock(&sdata->local->mtx);
1943 }
1944
1945 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1946                                            u16 capab, bool erp_valid, u8 erp)
1947 {
1948         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1949         struct ieee80211_supported_band *sband;
1950         u32 changed = 0;
1951         bool use_protection;
1952         bool use_short_preamble;
1953         bool use_short_slot;
1954
1955         sband = ieee80211_get_sband(sdata);
1956         if (!sband)
1957                 return changed;
1958
1959         if (erp_valid) {
1960                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1961                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1962         } else {
1963                 use_protection = false;
1964                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1965         }
1966
1967         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1968         if (sband->band == NL80211_BAND_5GHZ)
1969                 use_short_slot = true;
1970
1971         if (use_protection != bss_conf->use_cts_prot) {
1972                 bss_conf->use_cts_prot = use_protection;
1973                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1974         }
1975
1976         if (use_short_preamble != bss_conf->use_short_preamble) {
1977                 bss_conf->use_short_preamble = use_short_preamble;
1978                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1979         }
1980
1981         if (use_short_slot != bss_conf->use_short_slot) {
1982                 bss_conf->use_short_slot = use_short_slot;
1983                 changed |= BSS_CHANGED_ERP_SLOT;
1984         }
1985
1986         return changed;
1987 }
1988
1989 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1990                                      struct cfg80211_bss *cbss,
1991                                      u32 bss_info_changed)
1992 {
1993         struct ieee80211_bss *bss = (void *)cbss->priv;
1994         struct ieee80211_local *local = sdata->local;
1995         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1996
1997         bss_info_changed |= BSS_CHANGED_ASSOC;
1998         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1999                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2000
2001         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2002                 beacon_loss_count * bss_conf->beacon_int));
2003
2004         sdata->u.mgd.associated = cbss;
2005         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2006
2007         ieee80211_check_rate_mask(sdata);
2008
2009         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2010
2011         if (sdata->vif.p2p ||
2012             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2013                 const struct cfg80211_bss_ies *ies;
2014
2015                 rcu_read_lock();
2016                 ies = rcu_dereference(cbss->ies);
2017                 if (ies) {
2018                         int ret;
2019
2020                         ret = cfg80211_get_p2p_attr(
2021                                         ies->data, ies->len,
2022                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2023                                         (u8 *) &bss_conf->p2p_noa_attr,
2024                                         sizeof(bss_conf->p2p_noa_attr));
2025                         if (ret >= 2) {
2026                                 sdata->u.mgd.p2p_noa_index =
2027                                         bss_conf->p2p_noa_attr.index;
2028                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
2029                         }
2030                 }
2031                 rcu_read_unlock();
2032         }
2033
2034         /* just to be sure */
2035         ieee80211_stop_poll(sdata);
2036
2037         ieee80211_led_assoc(local, 1);
2038
2039         if (sdata->u.mgd.have_beacon) {
2040                 /*
2041                  * If the AP is buggy we may get here with no DTIM period
2042                  * known, so assume it's 1 which is the only safe assumption
2043                  * in that case, although if the TIM IE is broken powersave
2044                  * probably just won't work at all.
2045                  */
2046                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2047                 bss_conf->beacon_rate = bss->beacon_rate;
2048                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2049         } else {
2050                 bss_conf->beacon_rate = NULL;
2051                 bss_conf->dtim_period = 0;
2052         }
2053
2054         bss_conf->assoc = 1;
2055
2056         /* Tell the driver to monitor connection quality (if supported) */
2057         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2058             bss_conf->cqm_rssi_thold)
2059                 bss_info_changed |= BSS_CHANGED_CQM;
2060
2061         /* Enable ARP filtering */
2062         if (bss_conf->arp_addr_cnt)
2063                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2064
2065         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2066
2067         mutex_lock(&local->iflist_mtx);
2068         ieee80211_recalc_ps(local);
2069         mutex_unlock(&local->iflist_mtx);
2070
2071         ieee80211_recalc_smps(sdata);
2072         ieee80211_recalc_ps_vif(sdata);
2073
2074         netif_carrier_on(sdata->dev);
2075 }
2076
2077 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2078                                    u16 stype, u16 reason, bool tx,
2079                                    u8 *frame_buf)
2080 {
2081         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2082         struct ieee80211_local *local = sdata->local;
2083         u32 changed = 0;
2084
2085         sdata_assert_lock(sdata);
2086
2087         if (WARN_ON_ONCE(tx && !frame_buf))
2088                 return;
2089
2090         if (WARN_ON(!ifmgd->associated))
2091                 return;
2092
2093         ieee80211_stop_poll(sdata);
2094
2095         ifmgd->associated = NULL;
2096         netif_carrier_off(sdata->dev);
2097
2098         /*
2099          * if we want to get out of ps before disassoc (why?) we have
2100          * to do it before sending disassoc, as otherwise the null-packet
2101          * won't be valid.
2102          */
2103         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2104                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2105                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2106         }
2107         local->ps_sdata = NULL;
2108
2109         /* disable per-vif ps */
2110         ieee80211_recalc_ps_vif(sdata);
2111
2112         /* make sure ongoing transmission finishes */
2113         synchronize_net();
2114
2115         /*
2116          * drop any frame before deauth/disassoc, this can be data or
2117          * management frame. Since we are disconnecting, we should not
2118          * insist sending these frames which can take time and delay
2119          * the disconnection and possible the roaming.
2120          */
2121         if (tx)
2122                 ieee80211_flush_queues(local, sdata, true);
2123
2124         /* deauthenticate/disassociate now */
2125         if (tx || frame_buf) {
2126                 /*
2127                  * In multi channel scenarios guarantee that the virtual
2128                  * interface is granted immediate airtime to transmit the
2129                  * deauthentication frame by calling mgd_prepare_tx, if the
2130                  * driver requested so.
2131                  */
2132                 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2133                     !ifmgd->have_beacon)
2134                         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2135
2136                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2137                                                reason, tx, frame_buf);
2138         }
2139
2140         /* flush out frame - make sure the deauth was actually sent */
2141         if (tx)
2142                 ieee80211_flush_queues(local, sdata, false);
2143
2144         /* clear bssid only after building the needed mgmt frames */
2145         eth_zero_addr(ifmgd->bssid);
2146
2147         /* remove AP and TDLS peers */
2148         sta_info_flush(sdata);
2149
2150         /* finally reset all BSS / config parameters */
2151         changed |= ieee80211_reset_erp_info(sdata);
2152
2153         ieee80211_led_assoc(local, 0);
2154         changed |= BSS_CHANGED_ASSOC;
2155         sdata->vif.bss_conf.assoc = false;
2156
2157         ifmgd->p2p_noa_index = -1;
2158         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2159                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2160
2161         /* on the next assoc, re-program HT/VHT parameters */
2162         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2163         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2164         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2165         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2166
2167         /* reset MU-MIMO ownership and group data */
2168         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2169                sizeof(sdata->vif.bss_conf.mu_group.membership));
2170         memset(sdata->vif.bss_conf.mu_group.position, 0,
2171                sizeof(sdata->vif.bss_conf.mu_group.position));
2172         changed |= BSS_CHANGED_MU_GROUPS;
2173         sdata->vif.mu_mimo_owner = false;
2174
2175         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2176
2177         del_timer_sync(&local->dynamic_ps_timer);
2178         cancel_work_sync(&local->dynamic_ps_enable_work);
2179
2180         /* Disable ARP filtering */
2181         if (sdata->vif.bss_conf.arp_addr_cnt)
2182                 changed |= BSS_CHANGED_ARP_FILTER;
2183
2184         sdata->vif.bss_conf.qos = false;
2185         changed |= BSS_CHANGED_QOS;
2186
2187         /* The BSSID (not really interesting) and HT changed */
2188         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2189         ieee80211_bss_info_change_notify(sdata, changed);
2190
2191         /* disassociated - set to defaults now */
2192         ieee80211_set_wmm_default(sdata, false, false);
2193
2194         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2195         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2196         del_timer_sync(&sdata->u.mgd.timer);
2197         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2198
2199         sdata->vif.bss_conf.dtim_period = 0;
2200         sdata->vif.bss_conf.beacon_rate = NULL;
2201
2202         ifmgd->have_beacon = false;
2203
2204         ifmgd->flags = 0;
2205         mutex_lock(&local->mtx);
2206         ieee80211_vif_release_channel(sdata);
2207
2208         sdata->vif.csa_active = false;
2209         ifmgd->csa_waiting_bcn = false;
2210         ifmgd->csa_ignored_same_chan = false;
2211         if (sdata->csa_block_tx) {
2212                 ieee80211_wake_vif_queues(local, sdata,
2213                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2214                 sdata->csa_block_tx = false;
2215         }
2216         mutex_unlock(&local->mtx);
2217
2218         /* existing TX TSPEC sessions no longer exist */
2219         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2220         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2221
2222         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2223 }
2224
2225 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2226                              struct ieee80211_hdr *hdr)
2227 {
2228         /*
2229          * We can postpone the mgd.timer whenever receiving unicast frames
2230          * from AP because we know that the connection is working both ways
2231          * at that time. But multicast frames (and hence also beacons) must
2232          * be ignored here, because we need to trigger the timer during
2233          * data idle periods for sending the periodic probe request to the
2234          * AP we're connected to.
2235          */
2236         if (is_multicast_ether_addr(hdr->addr1))
2237                 return;
2238
2239         ieee80211_sta_reset_conn_monitor(sdata);
2240 }
2241
2242 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2243 {
2244         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2245         struct ieee80211_local *local = sdata->local;
2246
2247         mutex_lock(&local->mtx);
2248         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2249                 goto out;
2250
2251         __ieee80211_stop_poll(sdata);
2252
2253         mutex_lock(&local->iflist_mtx);
2254         ieee80211_recalc_ps(local);
2255         mutex_unlock(&local->iflist_mtx);
2256
2257         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2258                 goto out;
2259
2260         /*
2261          * We've received a probe response, but are not sure whether
2262          * we have or will be receiving any beacons or data, so let's
2263          * schedule the timers again, just in case.
2264          */
2265         ieee80211_sta_reset_beacon_monitor(sdata);
2266
2267         mod_timer(&ifmgd->conn_mon_timer,
2268                   round_jiffies_up(jiffies +
2269                                    IEEE80211_CONNECTION_IDLE_TIME));
2270 out:
2271         mutex_unlock(&local->mtx);
2272 }
2273
2274 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2275                                            struct ieee80211_hdr *hdr,
2276                                            u16 tx_time)
2277 {
2278         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2279         u16 tid = ieee80211_get_tid(hdr);
2280         int ac = ieee80211_ac_from_tid(tid);
2281         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2282         unsigned long now = jiffies;
2283
2284         if (likely(!tx_tspec->admitted_time))
2285                 return;
2286
2287         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2288                 tx_tspec->consumed_tx_time = 0;
2289                 tx_tspec->time_slice_start = now;
2290
2291                 if (tx_tspec->downgraded) {
2292                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2293                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2294                 }
2295         }
2296
2297         if (tx_tspec->downgraded)
2298                 return;
2299
2300         tx_tspec->consumed_tx_time += tx_time;
2301
2302         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2303                 tx_tspec->downgraded = true;
2304                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2305                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2306         }
2307 }
2308
2309 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2310                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2311 {
2312         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2313
2314         if (!ieee80211_is_data(hdr->frame_control))
2315             return;
2316
2317         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2318             sdata->u.mgd.probe_send_count > 0) {
2319                 if (ack)
2320                         ieee80211_sta_reset_conn_monitor(sdata);
2321                 else
2322                         sdata->u.mgd.nullfunc_failed = true;
2323                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2324                 return;
2325         }
2326
2327         if (ack)
2328                 ieee80211_sta_reset_conn_monitor(sdata);
2329 }
2330
2331 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2332                                           const u8 *src, const u8 *dst,
2333                                           const u8 *ssid, size_t ssid_len,
2334                                           struct ieee80211_channel *channel)
2335 {
2336         struct sk_buff *skb;
2337
2338         skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2339                                         ssid, ssid_len, NULL, 0,
2340                                         IEEE80211_PROBE_FLAG_DIRECTED);
2341         if (skb)
2342                 ieee80211_tx_skb(sdata, skb);
2343 }
2344
2345 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2346 {
2347         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2348         const u8 *ssid;
2349         u8 *dst = ifmgd->associated->bssid;
2350         u8 unicast_limit = max(1, max_probe_tries - 3);
2351         struct sta_info *sta;
2352
2353         /*
2354          * Try sending broadcast probe requests for the last three
2355          * probe requests after the first ones failed since some
2356          * buggy APs only support broadcast probe requests.
2357          */
2358         if (ifmgd->probe_send_count >= unicast_limit)
2359                 dst = NULL;
2360
2361         /*
2362          * When the hardware reports an accurate Tx ACK status, it's
2363          * better to send a nullfunc frame instead of a probe request,
2364          * as it will kick us off the AP quickly if we aren't associated
2365          * anymore. The timeout will be reset if the frame is ACKed by
2366          * the AP.
2367          */
2368         ifmgd->probe_send_count++;
2369
2370         if (dst) {
2371                 mutex_lock(&sdata->local->sta_mtx);
2372                 sta = sta_info_get(sdata, dst);
2373                 if (!WARN_ON(!sta))
2374                         ieee80211_check_fast_rx(sta);
2375                 mutex_unlock(&sdata->local->sta_mtx);
2376         }
2377
2378         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2379                 ifmgd->nullfunc_failed = false;
2380                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2381         } else {
2382                 int ssid_len;
2383
2384                 rcu_read_lock();
2385                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2386                 if (WARN_ON_ONCE(ssid == NULL))
2387                         ssid_len = 0;
2388                 else
2389                         ssid_len = ssid[1];
2390
2391                 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2392                                               ssid + 2, ssid_len,
2393                                               ifmgd->associated->channel);
2394                 rcu_read_unlock();
2395         }
2396
2397         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2398         run_again(sdata, ifmgd->probe_timeout);
2399 }
2400
2401 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2402                                    bool beacon)
2403 {
2404         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2405         bool already = false;
2406
2407         if (!ieee80211_sdata_running(sdata))
2408                 return;
2409
2410         sdata_lock(sdata);
2411
2412         if (!ifmgd->associated)
2413                 goto out;
2414
2415         mutex_lock(&sdata->local->mtx);
2416
2417         if (sdata->local->tmp_channel || sdata->local->scanning) {
2418                 mutex_unlock(&sdata->local->mtx);
2419                 goto out;
2420         }
2421
2422         if (beacon) {
2423                 mlme_dbg_ratelimited(sdata,
2424                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2425                                      beacon_loss_count);
2426
2427                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2428         }
2429
2430         /*
2431          * The driver/our work has already reported this event or the
2432          * connection monitoring has kicked in and we have already sent
2433          * a probe request. Or maybe the AP died and the driver keeps
2434          * reporting until we disassociate...
2435          *
2436          * In either case we have to ignore the current call to this
2437          * function (except for setting the correct probe reason bit)
2438          * because otherwise we would reset the timer every time and
2439          * never check whether we received a probe response!
2440          */
2441         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2442                 already = true;
2443
2444         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2445
2446         mutex_unlock(&sdata->local->mtx);
2447
2448         if (already)
2449                 goto out;
2450
2451         mutex_lock(&sdata->local->iflist_mtx);
2452         ieee80211_recalc_ps(sdata->local);
2453         mutex_unlock(&sdata->local->iflist_mtx);
2454
2455         ifmgd->probe_send_count = 0;
2456         ieee80211_mgd_probe_ap_send(sdata);
2457  out:
2458         sdata_unlock(sdata);
2459 }
2460
2461 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2462                                           struct ieee80211_vif *vif)
2463 {
2464         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2465         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2466         struct cfg80211_bss *cbss;
2467         struct sk_buff *skb;
2468         const u8 *ssid;
2469         int ssid_len;
2470
2471         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2472                 return NULL;
2473
2474         sdata_assert_lock(sdata);
2475
2476         if (ifmgd->associated)
2477                 cbss = ifmgd->associated;
2478         else if (ifmgd->auth_data)
2479                 cbss = ifmgd->auth_data->bss;
2480         else if (ifmgd->assoc_data)
2481                 cbss = ifmgd->assoc_data->bss;
2482         else
2483                 return NULL;
2484
2485         rcu_read_lock();
2486         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2487         if (WARN_ON_ONCE(ssid == NULL))
2488                 ssid_len = 0;
2489         else
2490                 ssid_len = ssid[1];
2491
2492         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2493                                         (u32) -1, cbss->channel,
2494                                         ssid + 2, ssid_len,
2495                                         NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2496         rcu_read_unlock();
2497
2498         return skb;
2499 }
2500 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2501
2502 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2503                                         const u8 *buf, size_t len, bool tx,
2504                                         u16 reason)
2505 {
2506         struct ieee80211_event event = {
2507                 .type = MLME_EVENT,
2508                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2509                 .u.mlme.reason = reason,
2510         };
2511
2512         if (tx)
2513                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2514         else
2515                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2516
2517         drv_event_callback(sdata->local, sdata, &event);
2518 }
2519
2520 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2521 {
2522         struct ieee80211_local *local = sdata->local;
2523         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2524         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2525
2526         sdata_lock(sdata);
2527         if (!ifmgd->associated) {
2528                 sdata_unlock(sdata);
2529                 return;
2530         }
2531
2532         /* AP is probably out of range (or not reachable for another reason) so
2533          * remove the bss struct for that AP.
2534          */
2535         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2536
2537         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2538                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2539                                true, frame_buf);
2540         mutex_lock(&local->mtx);
2541         sdata->vif.csa_active = false;
2542         ifmgd->csa_waiting_bcn = false;
2543         if (sdata->csa_block_tx) {
2544                 ieee80211_wake_vif_queues(local, sdata,
2545                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2546                 sdata->csa_block_tx = false;
2547         }
2548         mutex_unlock(&local->mtx);
2549
2550         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2551                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2552
2553         sdata_unlock(sdata);
2554 }
2555
2556 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2557 {
2558         struct ieee80211_sub_if_data *sdata =
2559                 container_of(work, struct ieee80211_sub_if_data,
2560                              u.mgd.beacon_connection_loss_work);
2561         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2562
2563         if (ifmgd->associated)
2564                 ifmgd->beacon_loss_count++;
2565
2566         if (ifmgd->connection_loss) {
2567                 sdata_info(sdata, "Connection to AP %pM lost\n",
2568                            ifmgd->bssid);
2569                 __ieee80211_disconnect(sdata);
2570         } else {
2571                 ieee80211_mgd_probe_ap(sdata, true);
2572         }
2573 }
2574
2575 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2576 {
2577         struct ieee80211_sub_if_data *sdata =
2578                 container_of(work, struct ieee80211_sub_if_data,
2579                              u.mgd.csa_connection_drop_work);
2580
2581         __ieee80211_disconnect(sdata);
2582 }
2583
2584 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2585 {
2586         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2587         struct ieee80211_hw *hw = &sdata->local->hw;
2588
2589         trace_api_beacon_loss(sdata);
2590
2591         sdata->u.mgd.connection_loss = false;
2592         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2593 }
2594 EXPORT_SYMBOL(ieee80211_beacon_loss);
2595
2596 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2597 {
2598         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2599         struct ieee80211_hw *hw = &sdata->local->hw;
2600
2601         trace_api_connection_loss(sdata);
2602
2603         sdata->u.mgd.connection_loss = true;
2604         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2605 }
2606 EXPORT_SYMBOL(ieee80211_connection_loss);
2607
2608
2609 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2610                                         bool assoc)
2611 {
2612         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2613
2614         sdata_assert_lock(sdata);
2615
2616         if (!assoc) {
2617                 /*
2618                  * we are not authenticated yet, the only timer that could be
2619                  * running is the timeout for the authentication response which
2620                  * which is not relevant anymore.
2621                  */
2622                 del_timer_sync(&sdata->u.mgd.timer);
2623                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2624
2625                 eth_zero_addr(sdata->u.mgd.bssid);
2626                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2627                 sdata->u.mgd.flags = 0;
2628                 mutex_lock(&sdata->local->mtx);
2629                 ieee80211_vif_release_channel(sdata);
2630                 mutex_unlock(&sdata->local->mtx);
2631         }
2632
2633         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2634         kfree(auth_data);
2635         sdata->u.mgd.auth_data = NULL;
2636 }
2637
2638 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2639                                          bool assoc, bool abandon)
2640 {
2641         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2642
2643         sdata_assert_lock(sdata);
2644
2645         if (!assoc) {
2646                 /*
2647                  * we are not associated yet, the only timer that could be
2648                  * running is the timeout for the association response which
2649                  * which is not relevant anymore.
2650                  */
2651                 del_timer_sync(&sdata->u.mgd.timer);
2652                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2653
2654                 eth_zero_addr(sdata->u.mgd.bssid);
2655                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2656                 sdata->u.mgd.flags = 0;
2657                 sdata->vif.mu_mimo_owner = false;
2658
2659                 mutex_lock(&sdata->local->mtx);
2660                 ieee80211_vif_release_channel(sdata);
2661                 mutex_unlock(&sdata->local->mtx);
2662
2663                 if (abandon)
2664                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2665         }
2666
2667         kfree(assoc_data);
2668         sdata->u.mgd.assoc_data = NULL;
2669 }
2670
2671 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2672                                      struct ieee80211_mgmt *mgmt, size_t len)
2673 {
2674         struct ieee80211_local *local = sdata->local;
2675         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2676         u8 *pos;
2677         struct ieee802_11_elems elems;
2678         u32 tx_flags = 0;
2679
2680         pos = mgmt->u.auth.variable;
2681         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2682         if (!elems.challenge)
2683                 return;
2684         auth_data->expected_transaction = 4;
2685         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2686         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2687                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2688                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2689         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2690                             elems.challenge - 2, elems.challenge_len + 2,
2691                             auth_data->bss->bssid, auth_data->bss->bssid,
2692                             auth_data->key, auth_data->key_len,
2693                             auth_data->key_idx, tx_flags);
2694 }
2695
2696 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2697                                    struct ieee80211_mgmt *mgmt, size_t len)
2698 {
2699         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2700         u8 bssid[ETH_ALEN];
2701         u16 auth_alg, auth_transaction, status_code;
2702         struct sta_info *sta;
2703         struct ieee80211_event event = {
2704                 .type = MLME_EVENT,
2705                 .u.mlme.data = AUTH_EVENT,
2706         };
2707
2708         sdata_assert_lock(sdata);
2709
2710         if (len < 24 + 6)
2711                 return;
2712
2713         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2714                 return;
2715
2716         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2717
2718         if (!ether_addr_equal(bssid, mgmt->bssid))
2719                 return;
2720
2721         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2722         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2723         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2724
2725         if (auth_alg != ifmgd->auth_data->algorithm ||
2726             auth_transaction != ifmgd->auth_data->expected_transaction) {
2727                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2728                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2729                            auth_transaction,
2730                            ifmgd->auth_data->expected_transaction);
2731                 return;
2732         }
2733
2734         if (status_code != WLAN_STATUS_SUCCESS) {
2735                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2736                            mgmt->sa, status_code);
2737                 ieee80211_destroy_auth_data(sdata, false);
2738                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2739                 event.u.mlme.status = MLME_DENIED;
2740                 event.u.mlme.reason = status_code;
2741                 drv_event_callback(sdata->local, sdata, &event);
2742                 return;
2743         }
2744
2745         switch (ifmgd->auth_data->algorithm) {
2746         case WLAN_AUTH_OPEN:
2747         case WLAN_AUTH_LEAP:
2748         case WLAN_AUTH_FT:
2749         case WLAN_AUTH_SAE:
2750         case WLAN_AUTH_FILS_SK:
2751         case WLAN_AUTH_FILS_SK_PFS:
2752         case WLAN_AUTH_FILS_PK:
2753                 break;
2754         case WLAN_AUTH_SHARED_KEY:
2755                 if (ifmgd->auth_data->expected_transaction != 4) {
2756                         ieee80211_auth_challenge(sdata, mgmt, len);
2757                         /* need another frame */
2758                         return;
2759                 }
2760                 break;
2761         default:
2762                 WARN_ONCE(1, "invalid auth alg %d",
2763                           ifmgd->auth_data->algorithm);
2764                 return;
2765         }
2766
2767         event.u.mlme.status = MLME_SUCCESS;
2768         drv_event_callback(sdata->local, sdata, &event);
2769         sdata_info(sdata, "authenticated\n");
2770         ifmgd->auth_data->done = true;
2771         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2772         ifmgd->auth_data->timeout_started = true;
2773         run_again(sdata, ifmgd->auth_data->timeout);
2774
2775         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2776             ifmgd->auth_data->expected_transaction != 2) {
2777                 /*
2778                  * Report auth frame to user space for processing since another
2779                  * round of Authentication frames is still needed.
2780                  */
2781                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2782                 return;
2783         }
2784
2785         /* move station state to auth */
2786         mutex_lock(&sdata->local->sta_mtx);
2787         sta = sta_info_get(sdata, bssid);
2788         if (!sta) {
2789                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2790                 goto out_err;
2791         }
2792         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2793                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2794                 goto out_err;
2795         }
2796         mutex_unlock(&sdata->local->sta_mtx);
2797
2798         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2799         return;
2800  out_err:
2801         mutex_unlock(&sdata->local->sta_mtx);
2802         /* ignore frame -- wait for timeout */
2803 }
2804
2805 #define case_WLAN(type) \
2806         case WLAN_REASON_##type: return #type
2807
2808 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2809 {
2810         switch (reason_code) {
2811         case_WLAN(UNSPECIFIED);
2812         case_WLAN(PREV_AUTH_NOT_VALID);
2813         case_WLAN(DEAUTH_LEAVING);
2814         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2815         case_WLAN(DISASSOC_AP_BUSY);
2816         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2817         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2818         case_WLAN(DISASSOC_STA_HAS_LEFT);
2819         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2820         case_WLAN(DISASSOC_BAD_POWER);
2821         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2822         case_WLAN(INVALID_IE);
2823         case_WLAN(MIC_FAILURE);
2824         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2825         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2826         case_WLAN(IE_DIFFERENT);
2827         case_WLAN(INVALID_GROUP_CIPHER);
2828         case_WLAN(INVALID_PAIRWISE_CIPHER);
2829         case_WLAN(INVALID_AKMP);
2830         case_WLAN(UNSUPP_RSN_VERSION);
2831         case_WLAN(INVALID_RSN_IE_CAP);
2832         case_WLAN(IEEE8021X_FAILED);
2833         case_WLAN(CIPHER_SUITE_REJECTED);
2834         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2835         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2836         case_WLAN(DISASSOC_LOW_ACK);
2837         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2838         case_WLAN(QSTA_LEAVE_QBSS);
2839         case_WLAN(QSTA_NOT_USE);
2840         case_WLAN(QSTA_REQUIRE_SETUP);
2841         case_WLAN(QSTA_TIMEOUT);
2842         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2843         case_WLAN(MESH_PEER_CANCELED);
2844         case_WLAN(MESH_MAX_PEERS);
2845         case_WLAN(MESH_CONFIG);
2846         case_WLAN(MESH_CLOSE);
2847         case_WLAN(MESH_MAX_RETRIES);
2848         case_WLAN(MESH_CONFIRM_TIMEOUT);
2849         case_WLAN(MESH_INVALID_GTK);
2850         case_WLAN(MESH_INCONSISTENT_PARAM);
2851         case_WLAN(MESH_INVALID_SECURITY);
2852         case_WLAN(MESH_PATH_ERROR);
2853         case_WLAN(MESH_PATH_NOFORWARD);
2854         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2855         case_WLAN(MAC_EXISTS_IN_MBSS);
2856         case_WLAN(MESH_CHAN_REGULATORY);
2857         case_WLAN(MESH_CHAN);
2858         default: return "<unknown>";
2859         }
2860 }
2861
2862 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2863                                      struct ieee80211_mgmt *mgmt, size_t len)
2864 {
2865         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2866         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2867
2868         sdata_assert_lock(sdata);
2869
2870         if (len < 24 + 2)
2871                 return;
2872
2873         if (ifmgd->associated &&
2874             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2875                 const u8 *bssid = ifmgd->associated->bssid;
2876
2877                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2878                            bssid, reason_code,
2879                            ieee80211_get_reason_code_string(reason_code));
2880
2881                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2882
2883                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2884                                             reason_code);
2885                 return;
2886         }
2887
2888         if (ifmgd->assoc_data &&
2889             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2890                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2891
2892                 sdata_info(sdata,
2893                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2894                            bssid, reason_code,
2895                            ieee80211_get_reason_code_string(reason_code));
2896
2897                 ieee80211_destroy_assoc_data(sdata, false, true);
2898
2899                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2900                 return;
2901         }
2902 }
2903
2904
2905 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2906                                        struct ieee80211_mgmt *mgmt, size_t len)
2907 {
2908         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2909         u16 reason_code;
2910
2911         sdata_assert_lock(sdata);
2912
2913         if (len < 24 + 2)
2914                 return;
2915
2916         if (!ifmgd->associated ||
2917             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2918                 return;
2919
2920         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2921
2922         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2923                    mgmt->sa, reason_code,
2924                    ieee80211_get_reason_code_string(reason_code));
2925
2926         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2927
2928         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2929 }
2930
2931 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2932                                 u8 *supp_rates, unsigned int supp_rates_len,
2933                                 u32 *rates, u32 *basic_rates,
2934                                 bool *have_higher_than_11mbit,
2935                                 int *min_rate, int *min_rate_index,
2936                                 int shift)
2937 {
2938         int i, j;
2939
2940         for (i = 0; i < supp_rates_len; i++) {
2941                 int rate = supp_rates[i] & 0x7f;
2942                 bool is_basic = !!(supp_rates[i] & 0x80);
2943
2944                 if ((rate * 5 * (1 << shift)) > 110)
2945                         *have_higher_than_11mbit = true;
2946
2947                 /*
2948                  * Skip HT and VHT BSS membership selectors since they're not
2949                  * rates.
2950                  *
2951                  * Note: Even though the membership selector and the basic
2952                  *       rate flag share the same bit, they are not exactly
2953                  *       the same.
2954                  */
2955                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
2956                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
2957                         continue;
2958
2959                 for (j = 0; j < sband->n_bitrates; j++) {
2960                         struct ieee80211_rate *br;
2961                         int brate;
2962
2963                         br = &sband->bitrates[j];
2964
2965                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2966                         if (brate == rate) {
2967                                 *rates |= BIT(j);
2968                                 if (is_basic)
2969                                         *basic_rates |= BIT(j);
2970                                 if ((rate * 5) < *min_rate) {
2971                                         *min_rate = rate * 5;
2972                                         *min_rate_index = j;
2973                                 }
2974                                 break;
2975                         }
2976                 }
2977         }
2978 }
2979
2980 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2981                                     struct cfg80211_bss *cbss,
2982                                     struct ieee80211_mgmt *mgmt, size_t len)
2983 {
2984         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2985         struct ieee80211_local *local = sdata->local;
2986         struct ieee80211_supported_band *sband;
2987         struct sta_info *sta;
2988         u8 *pos;
2989         u16 capab_info, aid;
2990         struct ieee802_11_elems elems;
2991         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2992         const struct cfg80211_bss_ies *bss_ies = NULL;
2993         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2994         u32 changed = 0;
2995         int err;
2996         bool ret;
2997
2998         /* AssocResp and ReassocResp have identical structure */
2999
3000         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3001         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3002
3003         /*
3004          * The 5 MSB of the AID field are reserved
3005          * (802.11-2016 9.4.1.8 AID field)
3006          */
3007         aid &= 0x7ff;
3008
3009         ifmgd->broken_ap = false;
3010
3011         if (aid == 0 || aid > IEEE80211_MAX_AID) {
3012                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3013                            aid);
3014                 aid = 0;
3015                 ifmgd->broken_ap = true;
3016         }
3017
3018         pos = mgmt->u.assoc_resp.variable;
3019         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3020
3021         if (!elems.supp_rates) {
3022                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3023                 return false;
3024         }
3025
3026         ifmgd->aid = aid;
3027         ifmgd->tdls_chan_switch_prohibited =
3028                 elems.ext_capab && elems.ext_capab_len >= 5 &&
3029                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3030
3031         /*
3032          * Some APs are erroneously not including some information in their
3033          * (re)association response frames. Try to recover by using the data
3034          * from the beacon or probe response. This seems to afflict mobile
3035          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3036          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3037          */
3038         if ((assoc_data->wmm && !elems.wmm_param) ||
3039             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3040              (!elems.ht_cap_elem || !elems.ht_operation)) ||
3041             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3042              (!elems.vht_cap_elem || !elems.vht_operation))) {
3043                 const struct cfg80211_bss_ies *ies;
3044                 struct ieee802_11_elems bss_elems;
3045
3046                 rcu_read_lock();
3047                 ies = rcu_dereference(cbss->ies);
3048                 if (ies)
3049                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3050                                           GFP_ATOMIC);
3051                 rcu_read_unlock();
3052                 if (!bss_ies)
3053                         return false;
3054
3055                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3056                                        false, &bss_elems);
3057                 if (assoc_data->wmm &&
3058                     !elems.wmm_param && bss_elems.wmm_param) {
3059                         elems.wmm_param = bss_elems.wmm_param;
3060                         sdata_info(sdata,
3061                                    "AP bug: WMM param missing from AssocResp\n");
3062                 }
3063
3064                 /*
3065                  * Also check if we requested HT/VHT, otherwise the AP doesn't
3066                  * have to include the IEs in the (re)association response.
3067                  */
3068                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
3069                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3070                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
3071                         sdata_info(sdata,
3072                                    "AP bug: HT capability missing from AssocResp\n");
3073                 }
3074                 if (!elems.ht_operation && bss_elems.ht_operation &&
3075                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3076                         elems.ht_operation = bss_elems.ht_operation;
3077                         sdata_info(sdata,
3078                                    "AP bug: HT operation missing from AssocResp\n");
3079                 }
3080                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3081                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3082                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
3083                         sdata_info(sdata,
3084                                    "AP bug: VHT capa missing from AssocResp\n");
3085                 }
3086                 if (!elems.vht_operation && bss_elems.vht_operation &&
3087                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3088                         elems.vht_operation = bss_elems.vht_operation;
3089                         sdata_info(sdata,
3090                                    "AP bug: VHT operation missing from AssocResp\n");
3091                 }
3092         }
3093
3094         /*
3095          * We previously checked these in the beacon/probe response, so
3096          * they should be present here. This is just a safety net.
3097          */
3098         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3099             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3100                 sdata_info(sdata,
3101                            "HT AP is missing WMM params or HT capability/operation\n");
3102                 ret = false;
3103                 goto out;
3104         }
3105
3106         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3107             (!elems.vht_cap_elem || !elems.vht_operation)) {
3108                 sdata_info(sdata,
3109                            "VHT AP is missing VHT capability/operation\n");
3110                 ret = false;
3111                 goto out;
3112         }
3113
3114         mutex_lock(&sdata->local->sta_mtx);
3115         /*
3116          * station info was already allocated and inserted before
3117          * the association and should be available to us
3118          */
3119         sta = sta_info_get(sdata, cbss->bssid);
3120         if (WARN_ON(!sta)) {
3121                 mutex_unlock(&sdata->local->sta_mtx);
3122                 ret = false;
3123                 goto out;
3124         }
3125
3126         sband = ieee80211_get_sband(sdata);
3127         if (!sband) {
3128                 mutex_unlock(&sdata->local->sta_mtx);
3129                 ret = false;
3130                 goto out;
3131         }
3132
3133         /*
3134          * If AP doesn't support HT, or it doesn't have HE mandatory IEs, mark
3135          * HE as disabled. If on the 5GHz band, make sure it supports VHT.
3136          */
3137         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
3138             (sband->band == NL80211_BAND_5GHZ &&
3139              ifmgd->flags & IEEE80211_STA_DISABLE_VHT) ||
3140             (!elems.he_cap && !elems.he_operation))
3141                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
3142
3143         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3144             (!elems.he_cap || !elems.he_operation)) {
3145                 mutex_unlock(&sdata->local->sta_mtx);
3146                 sdata_info(sdata,
3147                            "HE AP is missing HE capability/operation\n");
3148                 ret = false;
3149                 goto out;
3150         }
3151
3152         /* Set up internal HT/VHT capabilities */
3153         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3154                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3155                                                   elems.ht_cap_elem, sta);
3156
3157         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3158                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3159                                                     elems.vht_cap_elem, sta);
3160
3161         if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3162             elems.he_cap) {
3163                 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3164                                                   elems.he_cap,
3165                                                   elems.he_cap_len,
3166                                                   sta);
3167
3168                 bss_conf->he_support = sta->sta.he_cap.has_he;
3169         } else {
3170                 bss_conf->he_support = false;
3171         }
3172
3173         if (bss_conf->he_support) {
3174                 u32 he_oper_params =
3175                         le32_to_cpu(elems.he_operation->he_oper_params);
3176
3177                 bss_conf->bss_color = he_oper_params &
3178                                       IEEE80211_HE_OPERATION_BSS_COLOR_MASK;
3179                 bss_conf->htc_trig_based_pkt_ext =
3180                         (he_oper_params &
3181                          IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK) <<
3182                         IEEE80211_HE_OPERATION_DFLT_PE_DURATION_OFFSET;
3183                 bss_conf->frame_time_rts_th =
3184                         (he_oper_params &
3185                          IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK) <<
3186                         IEEE80211_HE_OPERATION_RTS_THRESHOLD_OFFSET;
3187
3188                 bss_conf->multi_sta_back_32bit =
3189                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3190                         IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3191
3192                 bss_conf->ack_enabled =
3193                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3194                         IEEE80211_HE_MAC_CAP2_ACK_EN;
3195
3196                 bss_conf->uora_exists = !!elems.uora_element;
3197                 if (elems.uora_element)
3198                         bss_conf->uora_ocw_range = elems.uora_element[0];
3199
3200                 /* TODO: OPEN: what happens if BSS color disable is set? */
3201         }
3202
3203         /*
3204          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3205          * in their association response, so ignore that data for our own
3206          * configuration. If it changed since the last beacon, we'll get the
3207          * next beacon and update then.
3208          */
3209
3210         /*
3211          * If an operating mode notification IE is present, override the
3212          * NSS calculation (that would be done in rate_control_rate_init())
3213          * and use the # of streams from that element.
3214          */
3215         if (elems.opmode_notif &&
3216             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3217                 u8 nss;
3218
3219                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3220                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3221                 nss += 1;
3222                 sta->sta.rx_nss = nss;
3223         }
3224
3225         rate_control_rate_init(sta);
3226
3227         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3228                 set_sta_flag(sta, WLAN_STA_MFP);
3229                 sta->sta.mfp = true;
3230         } else {
3231                 sta->sta.mfp = false;
3232         }
3233
3234         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3235
3236         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3237         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3238                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3239         if (err) {
3240                 sdata_info(sdata,
3241                            "failed to move station %pM to desired state\n",
3242                            sta->sta.addr);
3243                 WARN_ON(__sta_info_destroy(sta));
3244                 mutex_unlock(&sdata->local->sta_mtx);
3245                 ret = false;
3246                 goto out;
3247         }
3248
3249         mutex_unlock(&sdata->local->sta_mtx);
3250
3251         /*
3252          * Always handle WMM once after association regardless
3253          * of the first value the AP uses. Setting -1 here has
3254          * that effect because the AP values is an unsigned
3255          * 4-bit value.
3256          */
3257         ifmgd->wmm_last_param_set = -1;
3258
3259         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3260                 ieee80211_set_wmm_default(sdata, false, false);
3261         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3262                                              elems.wmm_param_len,
3263                                              elems.mu_edca_param_set)) {
3264                 /* still enable QoS since we might have HT/VHT */
3265                 ieee80211_set_wmm_default(sdata, false, true);
3266                 /* set the disable-WMM flag in this case to disable
3267                  * tracking WMM parameter changes in the beacon if
3268                  * the parameters weren't actually valid. Doing so
3269                  * avoids changing parameters very strangely when
3270                  * the AP is going back and forth between valid and
3271                  * invalid parameters.
3272                  */
3273                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3274         }
3275         changed |= BSS_CHANGED_QOS;
3276
3277         if (elems.max_idle_period_ie) {
3278                 bss_conf->max_idle_period =
3279                         le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3280                 bss_conf->protected_keep_alive =
3281                         !!(elems.max_idle_period_ie->idle_options &
3282                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3283                 changed |= BSS_CHANGED_KEEP_ALIVE;
3284         } else {
3285                 bss_conf->max_idle_period = 0;
3286                 bss_conf->protected_keep_alive = false;
3287         }
3288
3289         /* set AID and assoc capability,
3290          * ieee80211_set_associated() will tell the driver */
3291         bss_conf->aid = aid;
3292         bss_conf->assoc_capability = capab_info;
3293         ieee80211_set_associated(sdata, cbss, changed);
3294
3295         /*
3296          * If we're using 4-addr mode, let the AP know that we're
3297          * doing so, so that it can create the STA VLAN on its side
3298          */
3299         if (ifmgd->use_4addr)
3300                 ieee80211_send_4addr_nullfunc(local, sdata);
3301
3302         /*
3303          * Start timer to probe the connection to the AP now.
3304          * Also start the timer that will detect beacon loss.
3305          */
3306         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3307         ieee80211_sta_reset_beacon_monitor(sdata);
3308
3309         ret = true;
3310  out:
3311         kfree(bss_ies);
3312         return ret;
3313 }
3314
3315 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3316                                          struct ieee80211_mgmt *mgmt,
3317                                          size_t len)
3318 {
3319         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3320         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3321         u16 capab_info, status_code, aid;
3322         struct ieee802_11_elems elems;
3323         int ac, uapsd_queues = -1;
3324         u8 *pos;
3325         bool reassoc;
3326         struct cfg80211_bss *bss;
3327         struct ieee80211_event event = {
3328                 .type = MLME_EVENT,
3329                 .u.mlme.data = ASSOC_EVENT,
3330         };
3331
3332         sdata_assert_lock(sdata);
3333
3334         if (!assoc_data)
3335                 return;
3336         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3337                 return;
3338
3339         /*
3340          * AssocResp and ReassocResp have identical structure, so process both
3341          * of them in this function.
3342          */
3343
3344         if (len < 24 + 6)
3345                 return;
3346
3347         reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3348         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3349         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3350         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3351
3352         sdata_info(sdata,
3353                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3354                    reassoc ? "Rea" : "A", mgmt->sa,
3355                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3356
3357         if (assoc_data->fils_kek_len &&
3358             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3359                 return;
3360
3361         pos = mgmt->u.assoc_resp.variable;
3362         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3363
3364         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3365             elems.timeout_int &&
3366             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3367                 u32 tu, ms;
3368                 tu = le32_to_cpu(elems.timeout_int->value);
3369                 ms = tu * 1024 / 1000;
3370                 sdata_info(sdata,
3371                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3372                            mgmt->sa, tu, ms);
3373                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3374                 assoc_data->timeout_started = true;
3375                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3376                         run_again(sdata, assoc_data->timeout);
3377                 return;
3378         }
3379
3380         bss = assoc_data->bss;
3381
3382         if (status_code != WLAN_STATUS_SUCCESS) {
3383                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3384                            mgmt->sa, status_code);
3385                 ieee80211_destroy_assoc_data(sdata, false, false);
3386                 event.u.mlme.status = MLME_DENIED;
3387                 event.u.mlme.reason = status_code;
3388                 drv_event_callback(sdata->local, sdata, &event);
3389         } else {
3390                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3391                         /* oops -- internal error -- send timeout for now */
3392                         ieee80211_destroy_assoc_data(sdata, false, false);
3393                         cfg80211_assoc_timeout(sdata->dev, bss);
3394                         return;
3395                 }
3396                 event.u.mlme.status = MLME_SUCCESS;
3397                 drv_event_callback(sdata->local, sdata, &event);
3398                 sdata_info(sdata, "associated\n");
3399
3400                 /*
3401                  * destroy assoc_data afterwards, as otherwise an idle
3402                  * recalc after assoc_data is NULL but before associated
3403                  * is set can cause the interface to go idle
3404                  */
3405                 ieee80211_destroy_assoc_data(sdata, true, false);
3406
3407                 /* get uapsd queues configuration */
3408                 uapsd_queues = 0;
3409                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3410                         if (sdata->tx_conf[ac].uapsd)
3411                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3412         }
3413
3414         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3415 }
3416
3417 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3418                                   struct ieee80211_mgmt *mgmt, size_t len,
3419                                   struct ieee80211_rx_status *rx_status,
3420                                   struct ieee802_11_elems *elems)
3421 {
3422         struct ieee80211_local *local = sdata->local;
3423         struct ieee80211_bss *bss;
3424         struct ieee80211_channel *channel;
3425
3426         sdata_assert_lock(sdata);
3427
3428         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3429         if (!channel)
3430                 return;
3431
3432         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3433                                         channel);
3434         if (bss) {
3435                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3436                 ieee80211_rx_bss_put(local, bss);
3437         }
3438 }
3439
3440
3441 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3442                                          struct sk_buff *skb)
3443 {
3444         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3445         struct ieee80211_if_managed *ifmgd;
3446         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3447         size_t baselen, len = skb->len;
3448         struct ieee802_11_elems elems;
3449
3450         ifmgd = &sdata->u.mgd;
3451
3452         sdata_assert_lock(sdata);
3453
3454         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3455                 return; /* ignore ProbeResp to foreign address */
3456
3457         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3458         if (baselen > len)
3459                 return;
3460
3461         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3462                                false, &elems);
3463
3464         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3465
3466         if (ifmgd->associated &&
3467             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3468                 ieee80211_reset_ap_probe(sdata);
3469 }
3470
3471 /*
3472  * This is the canonical list of information elements we care about,
3473  * the filter code also gives us all changes to the Microsoft OUI
3474  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3475  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3476  * changes to requested client power.
3477  *
3478  * We implement beacon filtering in software since that means we can
3479  * avoid processing the frame here and in cfg80211, and userspace
3480  * will not be able to tell whether the hardware supports it or not.
3481  *
3482  * XXX: This list needs to be dynamic -- userspace needs to be able to
3483  *      add items it requires. It also needs to be able to tell us to
3484  *      look out for other vendor IEs.
3485  */
3486 static const u64 care_about_ies =
3487         (1ULL << WLAN_EID_COUNTRY) |
3488         (1ULL << WLAN_EID_ERP_INFO) |
3489         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3490         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3491         (1ULL << WLAN_EID_HT_CAPABILITY) |
3492         (1ULL << WLAN_EID_HT_OPERATION) |
3493         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3494
3495 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3496                                         struct ieee80211_if_managed *ifmgd,
3497                                         struct ieee80211_bss_conf *bss_conf,
3498                                         struct ieee80211_local *local,
3499                                         struct ieee80211_rx_status *rx_status)
3500 {
3501         /* Track average RSSI from the Beacon frames of the current AP */
3502
3503         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3504                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3505                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3506                 ifmgd->last_cqm_event_signal = 0;
3507                 ifmgd->count_beacon_signal = 1;
3508                 ifmgd->last_ave_beacon_signal = 0;
3509         } else {
3510                 ifmgd->count_beacon_signal++;
3511         }
3512
3513         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3514
3515         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3516             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3517                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3518                 int last_sig = ifmgd->last_ave_beacon_signal;
3519                 struct ieee80211_event event = {
3520                         .type = RSSI_EVENT,
3521                 };
3522
3523                 /*
3524                  * if signal crosses either of the boundaries, invoke callback
3525                  * with appropriate parameters
3526                  */
3527                 if (sig > ifmgd->rssi_max_thold &&
3528                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3529                         ifmgd->last_ave_beacon_signal = sig;
3530                         event.u.rssi.data = RSSI_EVENT_HIGH;
3531                         drv_event_callback(local, sdata, &event);
3532                 } else if (sig < ifmgd->rssi_min_thold &&
3533                            (last_sig >= ifmgd->rssi_max_thold ||
3534                            last_sig == 0)) {
3535                         ifmgd->last_ave_beacon_signal = sig;
3536                         event.u.rssi.data = RSSI_EVENT_LOW;
3537                         drv_event_callback(local, sdata, &event);
3538                 }
3539         }
3540
3541         if (bss_conf->cqm_rssi_thold &&
3542             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3543             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3544                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3545                 int last_event = ifmgd->last_cqm_event_signal;
3546                 int thold = bss_conf->cqm_rssi_thold;
3547                 int hyst = bss_conf->cqm_rssi_hyst;
3548
3549                 if (sig < thold &&
3550                     (last_event == 0 || sig < last_event - hyst)) {
3551                         ifmgd->last_cqm_event_signal = sig;
3552                         ieee80211_cqm_rssi_notify(
3553                                 &sdata->vif,
3554                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3555                                 sig, GFP_KERNEL);
3556                 } else if (sig > thold &&
3557                            (last_event == 0 || sig > last_event + hyst)) {
3558                         ifmgd->last_cqm_event_signal = sig;
3559                         ieee80211_cqm_rssi_notify(
3560                                 &sdata->vif,
3561                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3562                                 sig, GFP_KERNEL);
3563                 }
3564         }
3565
3566         if (bss_conf->cqm_rssi_low &&
3567             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3568                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3569                 int last_event = ifmgd->last_cqm_event_signal;
3570                 int low = bss_conf->cqm_rssi_low;
3571                 int high = bss_conf->cqm_rssi_high;
3572
3573                 if (sig < low &&
3574                     (last_event == 0 || last_event >= low)) {
3575                         ifmgd->last_cqm_event_signal = sig;
3576                         ieee80211_cqm_rssi_notify(
3577                                 &sdata->vif,
3578                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3579                                 sig, GFP_KERNEL);
3580                 } else if (sig > high &&
3581                            (last_event == 0 || last_event <= high)) {
3582                         ifmgd->last_cqm_event_signal = sig;
3583                         ieee80211_cqm_rssi_notify(
3584                                 &sdata->vif,
3585                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3586                                 sig, GFP_KERNEL);
3587                 }
3588         }
3589 }
3590
3591 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3592                                      struct ieee80211_mgmt *mgmt, size_t len,
3593                                      struct ieee80211_rx_status *rx_status)
3594 {
3595         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3596         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3597         size_t baselen;
3598         struct ieee802_11_elems elems;
3599         struct ieee80211_local *local = sdata->local;
3600         struct ieee80211_chanctx_conf *chanctx_conf;
3601         struct ieee80211_channel *chan;
3602         struct sta_info *sta;
3603         u32 changed = 0;
3604         bool erp_valid;
3605         u8 erp_value = 0;
3606         u32 ncrc;
3607         u8 *bssid;
3608         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3609
3610         sdata_assert_lock(sdata);
3611
3612         /* Process beacon from the current BSS */
3613         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3614         if (baselen > len)
3615                 return;
3616
3617         rcu_read_lock();
3618         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3619         if (!chanctx_conf) {
3620                 rcu_read_unlock();
3621                 return;
3622         }
3623
3624         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3625                 rcu_read_unlock();
3626                 return;
3627         }
3628         chan = chanctx_conf->def.chan;
3629         rcu_read_unlock();
3630
3631         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3632             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3633                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3634                                        len - baselen, false, &elems);
3635
3636                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3637                 if (elems.tim && !elems.parse_error) {
3638                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3639                         ifmgd->dtim_period = tim_ie->dtim_period;
3640                 }
3641                 ifmgd->have_beacon = true;
3642                 ifmgd->assoc_data->need_beacon = false;
3643                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3644                         sdata->vif.bss_conf.sync_tsf =
3645                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3646                         sdata->vif.bss_conf.sync_device_ts =
3647                                 rx_status->device_timestamp;
3648                         if (elems.tim)
3649                                 sdata->vif.bss_conf.sync_dtim_count =
3650                                         elems.tim->dtim_count;
3651                         else
3652                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3653                 }
3654                 /* continue assoc process */
3655                 ifmgd->assoc_data->timeout = jiffies;
3656                 ifmgd->assoc_data->timeout_started = true;
3657                 run_again(sdata, ifmgd->assoc_data->timeout);
3658                 return;
3659         }
3660
3661         if (!ifmgd->associated ||
3662             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3663                 return;
3664         bssid = ifmgd->associated->bssid;
3665
3666         if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3667                 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3668                                             local, rx_status);
3669
3670         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3671                 mlme_dbg_ratelimited(sdata,
3672                                      "cancelling AP probe due to a received beacon\n");
3673                 ieee80211_reset_ap_probe(sdata);
3674         }
3675
3676         /*
3677          * Push the beacon loss detection into the future since
3678          * we are processing a beacon from the AP just now.
3679          */
3680         ieee80211_sta_reset_beacon_monitor(sdata);
3681
3682         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3683         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3684                                           len - baselen, false, &elems,
3685                                           care_about_ies, ncrc);
3686
3687         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3688             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3689                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3690                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3691                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3692                                 ieee80211_hw_config(local,
3693                                                     IEEE80211_CONF_CHANGE_PS);
3694                         }
3695                         ieee80211_send_nullfunc(local, sdata, false);
3696                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3697                         local->pspolling = true;
3698
3699                         /*
3700                          * Here is assumed that the driver will be
3701                          * able to send ps-poll frame and receive a
3702                          * response even though power save mode is
3703                          * enabled, but some drivers might require
3704                          * to disable power save here. This needs
3705                          * to be investigated.
3706                          */
3707                         ieee80211_send_pspoll(local, sdata);
3708                 }
3709         }
3710
3711         if (sdata->vif.p2p ||
3712             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3713                 struct ieee80211_p2p_noa_attr noa = {};
3714                 int ret;
3715
3716                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3717                                             len - baselen,
3718                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3719                                             (u8 *) &noa, sizeof(noa));
3720                 if (ret >= 2) {
3721                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3722                                 /* valid noa_attr and index changed */
3723                                 sdata->u.mgd.p2p_noa_index = noa.index;
3724                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3725                                 changed |= BSS_CHANGED_P2P_PS;
3726                                 /*
3727                                  * make sure we update all information, the CRC
3728                                  * mechanism doesn't look at P2P attributes.
3729                                  */
3730                                 ifmgd->beacon_crc_valid = false;
3731                         }
3732                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3733                         /* noa_attr not found and we had valid noa_attr before */
3734                         sdata->u.mgd.p2p_noa_index = -1;
3735                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3736                         changed |= BSS_CHANGED_P2P_PS;
3737                         ifmgd->beacon_crc_valid = false;
3738                 }
3739         }
3740
3741         if (ifmgd->csa_waiting_bcn)
3742                 ieee80211_chswitch_post_beacon(sdata);
3743
3744         /*
3745          * Update beacon timing and dtim count on every beacon appearance. This
3746          * will allow the driver to use the most updated values. Do it before
3747          * comparing this one with last received beacon.
3748          * IMPORTANT: These parameters would possibly be out of sync by the time
3749          * the driver will use them. The synchronized view is currently
3750          * guaranteed only in certain callbacks.
3751          */
3752         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3753                 sdata->vif.bss_conf.sync_tsf =
3754                         le64_to_cpu(mgmt->u.beacon.timestamp);
3755                 sdata->vif.bss_conf.sync_device_ts =
3756                         rx_status->device_timestamp;
3757                 if (elems.tim)
3758                         sdata->vif.bss_conf.sync_dtim_count =
3759                                 elems.tim->dtim_count;
3760                 else
3761                         sdata->vif.bss_conf.sync_dtim_count = 0;
3762         }
3763
3764         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3765                 return;
3766         ifmgd->beacon_crc = ncrc;
3767         ifmgd->beacon_crc_valid = true;
3768
3769         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3770
3771         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3772                                          rx_status->device_timestamp,
3773                                          &elems, true);
3774
3775         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3776             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3777                                      elems.wmm_param_len,
3778                                      elems.mu_edca_param_set))
3779                 changed |= BSS_CHANGED_QOS;
3780
3781         /*
3782          * If we haven't had a beacon before, tell the driver about the
3783          * DTIM period (and beacon timing if desired) now.
3784          */
3785         if (!ifmgd->have_beacon) {
3786                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3787                 if (elems.tim)
3788                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3789                 else
3790                         bss_conf->dtim_period = 1;
3791
3792                 changed |= BSS_CHANGED_BEACON_INFO;
3793                 ifmgd->have_beacon = true;
3794
3795                 mutex_lock(&local->iflist_mtx);
3796                 ieee80211_recalc_ps(local);
3797                 mutex_unlock(&local->iflist_mtx);
3798
3799                 ieee80211_recalc_ps_vif(sdata);
3800         }
3801
3802         if (elems.erp_info) {
3803                 erp_valid = true;
3804                 erp_value = elems.erp_info[0];
3805         } else {
3806                 erp_valid = false;
3807         }
3808         changed |= ieee80211_handle_bss_capability(sdata,
3809                         le16_to_cpu(mgmt->u.beacon.capab_info),
3810                         erp_valid, erp_value);
3811
3812         mutex_lock(&local->sta_mtx);
3813         sta = sta_info_get(sdata, bssid);
3814
3815         if (ieee80211_config_bw(sdata, sta,
3816                                 elems.ht_cap_elem, elems.ht_operation,
3817                                 elems.vht_operation, elems.he_operation,
3818                                 bssid, &changed)) {
3819                 mutex_unlock(&local->sta_mtx);
3820                 sdata_info(sdata,
3821                            "failed to follow AP %pM bandwidth change, disconnect\n",
3822                            bssid);
3823                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3824                                        WLAN_REASON_DEAUTH_LEAVING,
3825                                        true, deauth_buf);
3826                 ieee80211_report_disconnect(sdata, deauth_buf,
3827                                             sizeof(deauth_buf), true,
3828                                             WLAN_REASON_DEAUTH_LEAVING);
3829                 return;
3830         }
3831
3832         if (sta && elems.opmode_notif)
3833                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3834                                             rx_status->band);
3835         mutex_unlock(&local->sta_mtx);
3836
3837         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3838                                                elems.country_elem,
3839                                                elems.country_elem_len,
3840                                                elems.pwr_constr_elem,
3841                                                elems.cisco_dtpc_elem);
3842
3843         ieee80211_bss_info_change_notify(sdata, changed);
3844 }
3845
3846 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3847                                   struct sk_buff *skb)
3848 {
3849         struct ieee80211_rx_status *rx_status;
3850         struct ieee80211_mgmt *mgmt;
3851         u16 fc;
3852         struct ieee802_11_elems elems;
3853         int ies_len;
3854
3855         rx_status = (struct ieee80211_rx_status *) skb->cb;
3856         mgmt = (struct ieee80211_mgmt *) skb->data;
3857         fc = le16_to_cpu(mgmt->frame_control);
3858
3859         sdata_lock(sdata);
3860
3861         switch (fc & IEEE80211_FCTL_STYPE) {
3862         case IEEE80211_STYPE_BEACON:
3863                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3864                 break;
3865         case IEEE80211_STYPE_PROBE_RESP:
3866                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3867                 break;
3868         case IEEE80211_STYPE_AUTH:
3869                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3870                 break;
3871         case IEEE80211_STYPE_DEAUTH:
3872                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3873                 break;
3874         case IEEE80211_STYPE_DISASSOC:
3875                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3876                 break;
3877         case IEEE80211_STYPE_ASSOC_RESP:
3878         case IEEE80211_STYPE_REASSOC_RESP:
3879                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3880                 break;
3881         case IEEE80211_STYPE_ACTION:
3882                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3883                         ies_len = skb->len -
3884                                   offsetof(struct ieee80211_mgmt,
3885                                            u.action.u.chan_switch.variable);
3886
3887                         if (ies_len < 0)
3888                                 break;
3889
3890                         ieee802_11_parse_elems(
3891                                 mgmt->u.action.u.chan_switch.variable,
3892                                 ies_len, true, &elems);
3893
3894                         if (elems.parse_error)
3895                                 break;
3896
3897                         ieee80211_sta_process_chanswitch(sdata,
3898                                                  rx_status->mactime,
3899                                                  rx_status->device_timestamp,
3900                                                  &elems, false);
3901                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3902                         ies_len = skb->len -
3903                                   offsetof(struct ieee80211_mgmt,
3904                                            u.action.u.ext_chan_switch.variable);
3905
3906                         if (ies_len < 0)
3907                                 break;
3908
3909                         ieee802_11_parse_elems(
3910                                 mgmt->u.action.u.ext_chan_switch.variable,
3911                                 ies_len, true, &elems);
3912
3913                         if (elems.parse_error)
3914                                 break;
3915
3916                         /* for the handling code pretend this was also an IE */
3917                         elems.ext_chansw_ie =
3918                                 &mgmt->u.action.u.ext_chan_switch.data;
3919
3920                         ieee80211_sta_process_chanswitch(sdata,
3921                                                  rx_status->mactime,
3922                                                  rx_status->device_timestamp,
3923                                                  &elems, false);
3924                 }
3925                 break;
3926         }
3927         sdata_unlock(sdata);
3928 }
3929
3930 static void ieee80211_sta_timer(struct timer_list *t)
3931 {
3932         struct ieee80211_sub_if_data *sdata =
3933                 from_timer(sdata, t, u.mgd.timer);
3934
3935         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3936 }
3937
3938 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3939                                           u8 *bssid, u8 reason, bool tx)
3940 {
3941         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3942
3943         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3944                                tx, frame_buf);
3945
3946         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3947                                     reason);
3948 }
3949
3950 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3951 {
3952         struct ieee80211_local *local = sdata->local;
3953         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3954         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3955         u32 tx_flags = 0;
3956         u16 trans = 1;
3957         u16 status = 0;
3958         u16 prepare_tx_duration = 0;
3959
3960         sdata_assert_lock(sdata);
3961
3962         if (WARN_ON_ONCE(!auth_data))
3963                 return -EINVAL;
3964
3965         auth_data->tries++;
3966
3967         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3968                 sdata_info(sdata, "authentication with %pM timed out\n",
3969                            auth_data->bss->bssid);
3970
3971                 /*
3972                  * Most likely AP is not in the range so remove the
3973                  * bss struct for that AP.
3974                  */
3975                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3976
3977                 return -ETIMEDOUT;
3978         }
3979
3980         if (auth_data->algorithm == WLAN_AUTH_SAE)
3981                 prepare_tx_duration =
3982                         jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
3983
3984         drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
3985
3986         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3987                    auth_data->bss->bssid, auth_data->tries,
3988                    IEEE80211_AUTH_MAX_TRIES);
3989
3990         auth_data->expected_transaction = 2;
3991
3992         if (auth_data->algorithm == WLAN_AUTH_SAE) {
3993                 trans = auth_data->sae_trans;
3994                 status = auth_data->sae_status;
3995                 auth_data->expected_transaction = trans;
3996         }
3997
3998         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3999                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4000                            IEEE80211_TX_INTFL_MLME_CONN_TX;
4001
4002         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4003                             auth_data->data, auth_data->data_len,
4004                             auth_data->bss->bssid,
4005                             auth_data->bss->bssid, NULL, 0, 0,
4006                             tx_flags);
4007
4008         if (tx_flags == 0) {
4009                 if (auth_data->algorithm == WLAN_AUTH_SAE)
4010                         auth_data->timeout = jiffies +
4011                                 IEEE80211_AUTH_TIMEOUT_SAE;
4012                 else
4013                         auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4014         } else {
4015                 auth_data->timeout =
4016                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4017         }
4018
4019         auth_data->timeout_started = true;
4020         run_again(sdata, auth_data->timeout);
4021
4022         return 0;
4023 }
4024
4025 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4026 {
4027         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4028         struct ieee80211_local *local = sdata->local;
4029
4030         sdata_assert_lock(sdata);
4031
4032         assoc_data->tries++;
4033         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4034                 sdata_info(sdata, "association with %pM timed out\n",
4035                            assoc_data->bss->bssid);
4036
4037                 /*
4038                  * Most likely AP is not in the range so remove the
4039                  * bss struct for that AP.
4040                  */
4041                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4042
4043                 return -ETIMEDOUT;
4044         }
4045
4046         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4047                    assoc_data->bss->bssid, assoc_data->tries,
4048                    IEEE80211_ASSOC_MAX_TRIES);
4049         ieee80211_send_assoc(sdata);
4050
4051         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4052                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4053                 assoc_data->timeout_started = true;
4054                 run_again(sdata, assoc_data->timeout);
4055         } else {
4056                 assoc_data->timeout =
4057                         round_jiffies_up(jiffies +
4058                                          IEEE80211_ASSOC_TIMEOUT_LONG);
4059                 assoc_data->timeout_started = true;
4060                 run_again(sdata, assoc_data->timeout);
4061         }
4062
4063         return 0;
4064 }
4065
4066 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4067                                   __le16 fc, bool acked)
4068 {
4069         struct ieee80211_local *local = sdata->local;
4070
4071         sdata->u.mgd.status_fc = fc;
4072         sdata->u.mgd.status_acked = acked;
4073         sdata->u.mgd.status_received = true;
4074
4075         ieee80211_queue_work(&local->hw, &sdata->work);
4076 }
4077
4078 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4079 {
4080         struct ieee80211_local *local = sdata->local;
4081         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4082
4083         sdata_lock(sdata);
4084
4085         if (ifmgd->status_received) {
4086                 __le16 fc = ifmgd->status_fc;
4087                 bool status_acked = ifmgd->status_acked;
4088
4089                 ifmgd->status_received = false;
4090                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4091                         if (status_acked) {
4092                                 if (ifmgd->auth_data->algorithm ==
4093                                     WLAN_AUTH_SAE)
4094                                         ifmgd->auth_data->timeout =
4095                                                 jiffies +
4096                                                 IEEE80211_AUTH_TIMEOUT_SAE;
4097                                 else
4098                                         ifmgd->auth_data->timeout =
4099                                                 jiffies +
4100                                                 IEEE80211_AUTH_TIMEOUT_SHORT;
4101                                 run_again(sdata, ifmgd->auth_data->timeout);
4102                         } else {
4103                                 ifmgd->auth_data->timeout = jiffies - 1;
4104                         }
4105                         ifmgd->auth_data->timeout_started = true;
4106                 } else if (ifmgd->assoc_data &&
4107                            (ieee80211_is_assoc_req(fc) ||
4108                             ieee80211_is_reassoc_req(fc))) {
4109                         if (status_acked) {
4110                                 ifmgd->assoc_data->timeout =
4111                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4112                                 run_again(sdata, ifmgd->assoc_data->timeout);
4113                         } else {
4114                                 ifmgd->assoc_data->timeout = jiffies - 1;
4115                         }
4116                         ifmgd->assoc_data->timeout_started = true;
4117                 }
4118         }
4119
4120         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4121             time_after(jiffies, ifmgd->auth_data->timeout)) {
4122                 if (ifmgd->auth_data->done) {
4123                         /*
4124                          * ok ... we waited for assoc but userspace didn't,
4125                          * so let's just kill the auth data
4126                          */
4127                         ieee80211_destroy_auth_data(sdata, false);
4128                 } else if (ieee80211_auth(sdata)) {
4129                         u8 bssid[ETH_ALEN];
4130                         struct ieee80211_event event = {
4131                                 .type = MLME_EVENT,
4132                                 .u.mlme.data = AUTH_EVENT,
4133                                 .u.mlme.status = MLME_TIMEOUT,
4134                         };
4135
4136                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4137
4138                         ieee80211_destroy_auth_data(sdata, false);
4139
4140                         cfg80211_auth_timeout(sdata->dev, bssid);
4141                         drv_event_callback(sdata->local, sdata, &event);
4142                 }
4143         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4144                 run_again(sdata, ifmgd->auth_data->timeout);
4145
4146         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4147             time_after(jiffies, ifmgd->assoc_data->timeout)) {
4148                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4149                     ieee80211_do_assoc(sdata)) {
4150                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4151                         struct ieee80211_event event = {
4152                                 .type = MLME_EVENT,
4153                                 .u.mlme.data = ASSOC_EVENT,
4154                                 .u.mlme.status = MLME_TIMEOUT,
4155                         };
4156
4157                         ieee80211_destroy_assoc_data(sdata, false, false);
4158                         cfg80211_assoc_timeout(sdata->dev, bss);
4159                         drv_event_callback(sdata->local, sdata, &event);
4160                 }
4161         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4162                 run_again(sdata, ifmgd->assoc_data->timeout);
4163
4164         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4165             ifmgd->associated) {
4166                 u8 bssid[ETH_ALEN];
4167                 int max_tries;
4168
4169                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4170
4171                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4172                         max_tries = max_nullfunc_tries;
4173                 else
4174                         max_tries = max_probe_tries;
4175
4176                 /* ACK received for nullfunc probing frame */
4177                 if (!ifmgd->probe_send_count)
4178                         ieee80211_reset_ap_probe(sdata);
4179                 else if (ifmgd->nullfunc_failed) {
4180                         if (ifmgd->probe_send_count < max_tries) {
4181                                 mlme_dbg(sdata,
4182                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4183                                          bssid, ifmgd->probe_send_count,
4184                                          max_tries);
4185                                 ieee80211_mgd_probe_ap_send(sdata);
4186                         } else {
4187                                 mlme_dbg(sdata,
4188                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4189                                          bssid);
4190                                 ieee80211_sta_connection_lost(sdata, bssid,
4191                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4192                                         false);
4193                         }
4194                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4195                         run_again(sdata, ifmgd->probe_timeout);
4196                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4197                         mlme_dbg(sdata,
4198                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4199                                  bssid, probe_wait_ms);
4200                         ieee80211_sta_connection_lost(sdata, bssid,
4201                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4202                 } else if (ifmgd->probe_send_count < max_tries) {
4203                         mlme_dbg(sdata,
4204                                  "No probe response from AP %pM after %dms, try %d/%i\n",
4205                                  bssid, probe_wait_ms,
4206                                  ifmgd->probe_send_count, max_tries);
4207                         ieee80211_mgd_probe_ap_send(sdata);
4208                 } else {
4209                         /*
4210                          * We actually lost the connection ... or did we?
4211                          * Let's make sure!
4212                          */
4213                         mlme_dbg(sdata,
4214                                  "No probe response from AP %pM after %dms, disconnecting.\n",
4215                                  bssid, probe_wait_ms);
4216
4217                         ieee80211_sta_connection_lost(sdata, bssid,
4218                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4219                 }
4220         }
4221
4222         sdata_unlock(sdata);
4223 }
4224
4225 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4226 {
4227         struct ieee80211_sub_if_data *sdata =
4228                 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4229         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4230
4231         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4232                 return;
4233
4234         sdata->u.mgd.connection_loss = false;
4235         ieee80211_queue_work(&sdata->local->hw,
4236                              &sdata->u.mgd.beacon_connection_loss_work);
4237 }
4238
4239 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4240 {
4241         struct ieee80211_sub_if_data *sdata =
4242                 from_timer(sdata, t, u.mgd.conn_mon_timer);
4243         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4244         struct ieee80211_local *local = sdata->local;
4245
4246         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4247                 return;
4248
4249         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4250 }
4251
4252 static void ieee80211_sta_monitor_work(struct work_struct *work)
4253 {
4254         struct ieee80211_sub_if_data *sdata =
4255                 container_of(work, struct ieee80211_sub_if_data,
4256                              u.mgd.monitor_work);
4257
4258         ieee80211_mgd_probe_ap(sdata, false);
4259 }
4260
4261 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4262 {
4263         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4264                 __ieee80211_stop_poll(sdata);
4265
4266                 /* let's probe the connection once */
4267                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4268                         ieee80211_queue_work(&sdata->local->hw,
4269                                              &sdata->u.mgd.monitor_work);
4270         }
4271 }
4272
4273 #ifdef CONFIG_PM
4274 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4275 {
4276         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4277         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4278
4279         sdata_lock(sdata);
4280
4281         if (ifmgd->auth_data || ifmgd->assoc_data) {
4282                 const u8 *bssid = ifmgd->auth_data ?
4283                                 ifmgd->auth_data->bss->bssid :
4284                                 ifmgd->assoc_data->bss->bssid;
4285
4286                 /*
4287                  * If we are trying to authenticate / associate while suspending,
4288                  * cfg80211 won't know and won't actually abort those attempts,
4289                  * thus we need to do that ourselves.
4290                  */
4291                 ieee80211_send_deauth_disassoc(sdata, bssid,
4292                                                IEEE80211_STYPE_DEAUTH,
4293                                                WLAN_REASON_DEAUTH_LEAVING,
4294                                                false, frame_buf);
4295                 if (ifmgd->assoc_data)
4296                         ieee80211_destroy_assoc_data(sdata, false, true);
4297                 if (ifmgd->auth_data)
4298                         ieee80211_destroy_auth_data(sdata, false);
4299                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4300                                       IEEE80211_DEAUTH_FRAME_LEN);
4301         }
4302
4303         /* This is a bit of a hack - we should find a better and more generic
4304          * solution to this. Normally when suspending, cfg80211 will in fact
4305          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4306          * auth (not so important) or assoc (this is the problem) process.
4307          *
4308          * As a consequence, it can happen that we are in the process of both
4309          * associating and suspending, and receive an association response
4310          * after cfg80211 has checked if it needs to disconnect, but before
4311          * we actually set the flag to drop incoming frames. This will then
4312          * cause the workqueue flush to process the association response in
4313          * the suspend, resulting in a successful association just before it
4314          * tries to remove the interface from the driver, which now though
4315          * has a channel context assigned ... this results in issues.
4316          *
4317          * To work around this (for now) simply deauth here again if we're
4318          * now connected.
4319          */
4320         if (ifmgd->associated && !sdata->local->wowlan) {
4321                 u8 bssid[ETH_ALEN];
4322                 struct cfg80211_deauth_request req = {
4323                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4324                         .bssid = bssid,
4325                 };
4326
4327                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4328                 ieee80211_mgd_deauth(sdata, &req);
4329         }
4330
4331         sdata_unlock(sdata);
4332 }
4333
4334 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4335 {
4336         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4337
4338         sdata_lock(sdata);
4339         if (!ifmgd->associated) {
4340                 sdata_unlock(sdata);
4341                 return;
4342         }
4343
4344         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4345                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4346                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4347                 ieee80211_sta_connection_lost(sdata,
4348                                               ifmgd->associated->bssid,
4349                                               WLAN_REASON_UNSPECIFIED,
4350                                               true);
4351                 sdata_unlock(sdata);
4352                 return;
4353         }
4354         sdata_unlock(sdata);
4355 }
4356 #endif
4357
4358 /* interface setup */
4359 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4360 {
4361         struct ieee80211_if_managed *ifmgd;
4362
4363         ifmgd = &sdata->u.mgd;
4364         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4365         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4366         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4367                   ieee80211_beacon_connection_loss_work);
4368         INIT_WORK(&ifmgd->csa_connection_drop_work,
4369                   ieee80211_csa_connection_drop_work);
4370         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4371         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4372                           ieee80211_tdls_peer_del_work);
4373         timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4374         timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4375         timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4376         timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4377         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4378                           ieee80211_sta_handle_tspec_ac_params_wk);
4379
4380         ifmgd->flags = 0;
4381         ifmgd->powersave = sdata->wdev.ps;
4382         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4383         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4384         ifmgd->p2p_noa_index = -1;
4385
4386         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4387                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4388         else
4389                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4390
4391         /* Setup TDLS data */
4392         spin_lock_init(&ifmgd->teardown_lock);
4393         ifmgd->teardown_skb = NULL;
4394         ifmgd->orig_teardown_skb = NULL;
4395 }
4396
4397 /* scan finished notification */
4398 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4399 {
4400         struct ieee80211_sub_if_data *sdata;
4401
4402         /* Restart STA timers */
4403         rcu_read_lock();
4404         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4405                 if (ieee80211_sdata_running(sdata))
4406                         ieee80211_restart_sta_timer(sdata);
4407         }
4408         rcu_read_unlock();
4409 }
4410
4411 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4412                                      struct cfg80211_bss *cbss)
4413 {
4414         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4415         const u8 *ht_cap_ie, *vht_cap_ie;
4416         const struct ieee80211_ht_cap *ht_cap;
4417         const struct ieee80211_vht_cap *vht_cap;
4418         u8 chains = 1;
4419
4420         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4421                 return chains;
4422
4423         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4424         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4425                 ht_cap = (void *)(ht_cap_ie + 2);
4426                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4427                 /*
4428                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4429                  *       "Tx Unequal Modulation Supported" fields.
4430                  */
4431         }
4432
4433         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4434                 return chains;
4435
4436         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4437         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4438                 u8 nss;
4439                 u16 tx_mcs_map;
4440
4441                 vht_cap = (void *)(vht_cap_ie + 2);
4442                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4443                 for (nss = 8; nss > 0; nss--) {
4444                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4445                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4446                                 break;
4447                 }
4448                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4449                 chains = max(chains, nss);
4450         }
4451
4452         return chains;
4453 }
4454
4455 static bool
4456 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4457                                     const struct ieee80211_he_operation *he_op)
4458 {
4459         const struct ieee80211_sta_he_cap *sta_he_cap =
4460                 ieee80211_get_he_sta_cap(sband);
4461         u16 ap_min_req_set;
4462         int i;
4463
4464         if (!sta_he_cap || !he_op)
4465                 return false;
4466
4467         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4468
4469         /* Need to go over for 80MHz, 160MHz and for 80+80 */
4470         for (i = 0; i < 3; i++) {
4471                 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4472                         &sta_he_cap->he_mcs_nss_supp;
4473                 u16 sta_mcs_map_rx =
4474                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4475                 u16 sta_mcs_map_tx =
4476                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4477                 u8 nss;
4478                 bool verified = true;
4479
4480                 /*
4481                  * For each band there is a maximum of 8 spatial streams
4482                  * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4483                  * of 2 bits per NSS (1-8), with the values defined in enum
4484                  * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4485                  * capabilities aren't less than the AP's minimum requirements
4486                  * for this HE BSS per SS.
4487                  * It is enough to find one such band that meets the reqs.
4488                  */
4489                 for (nss = 8; nss > 0; nss--) {
4490                         u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4491                         u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4492                         u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4493
4494                         if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4495                                 continue;
4496
4497                         /*
4498                          * Make sure the HE AP doesn't require MCSs that aren't
4499                          * supported by the client
4500                          */
4501                         if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4502                             sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4503                             (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4504                                 verified = false;
4505                                 break;
4506                         }
4507                 }
4508
4509                 if (verified)
4510                         return true;
4511         }
4512
4513         /* If here, STA doesn't meet AP's HE min requirements */
4514         return false;
4515 }
4516
4517 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4518                                   struct cfg80211_bss *cbss)
4519 {
4520         struct ieee80211_local *local = sdata->local;
4521         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4522         const struct ieee80211_ht_cap *ht_cap = NULL;
4523         const struct ieee80211_ht_operation *ht_oper = NULL;
4524         const struct ieee80211_vht_operation *vht_oper = NULL;
4525         const struct ieee80211_he_operation *he_oper = NULL;
4526         struct ieee80211_supported_band *sband;
4527         struct cfg80211_chan_def chandef;
4528         int ret;
4529         u32 i;
4530         bool have_80mhz;
4531
4532         sband = local->hw.wiphy->bands[cbss->channel->band];
4533
4534         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4535                           IEEE80211_STA_DISABLE_80P80MHZ |
4536                           IEEE80211_STA_DISABLE_160MHZ);
4537
4538         rcu_read_lock();
4539
4540         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4541             sband->ht_cap.ht_supported) {
4542                 const u8 *ht_oper_ie, *ht_cap_ie;
4543
4544                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4545                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4546                         ht_oper = (void *)(ht_oper_ie + 2);
4547
4548                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4549                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4550                         ht_cap = (void *)(ht_cap_ie + 2);
4551
4552                 if (!ht_cap) {
4553                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4554                         ht_oper = NULL;
4555                 }
4556         }
4557
4558         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4559             sband->vht_cap.vht_supported) {
4560                 const u8 *vht_oper_ie, *vht_cap;
4561
4562                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4563                                                    WLAN_EID_VHT_OPERATION);
4564                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4565                         vht_oper = (void *)(vht_oper_ie + 2);
4566                 if (vht_oper && !ht_oper) {
4567                         vht_oper = NULL;
4568                         sdata_info(sdata,
4569                                    "AP advertised VHT without HT, disabling both\n");
4570                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4571                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4572                 }
4573
4574                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4575                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4576                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4577                         vht_oper = NULL;
4578                 }
4579         }
4580
4581         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
4582             ieee80211_get_he_sta_cap(sband)) {
4583                 const struct cfg80211_bss_ies *ies;
4584                 const u8 *he_oper_ie;
4585
4586                 ies = rcu_dereference(cbss->ies);
4587                 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4588                                                   ies->data, ies->len);
4589                 if (he_oper_ie &&
4590                     he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4591                         he_oper = (void *)(he_oper_ie + 3);
4592                 else
4593                         he_oper = NULL;
4594
4595                 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4596                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4597         }
4598
4599         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4600         have_80mhz = false;
4601         for (i = 0; i < sband->n_channels; i++) {
4602                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4603                                                 IEEE80211_CHAN_NO_80MHZ))
4604                         continue;
4605
4606                 have_80mhz = true;
4607                 break;
4608         }
4609
4610         if (!have_80mhz)
4611                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4612
4613         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4614                                                      cbss->channel,
4615                                                      ht_oper, vht_oper, he_oper,
4616                                                      &chandef, false);
4617
4618         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4619                                       local->rx_chains);
4620
4621         rcu_read_unlock();
4622
4623         /* will change later if needed */
4624         sdata->smps_mode = IEEE80211_SMPS_OFF;
4625
4626         mutex_lock(&local->mtx);
4627         /*
4628          * If this fails (possibly due to channel context sharing
4629          * on incompatible channels, e.g. 80+80 and 160 sharing the
4630          * same control channel) try to use a smaller bandwidth.
4631          */
4632         ret = ieee80211_vif_use_channel(sdata, &chandef,
4633                                         IEEE80211_CHANCTX_SHARED);
4634
4635         /* don't downgrade for 5 and 10 MHz channels, though. */
4636         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4637             chandef.width == NL80211_CHAN_WIDTH_10)
4638                 goto out;
4639
4640         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4641                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4642                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4643                                                 IEEE80211_CHANCTX_SHARED);
4644         }
4645  out:
4646         mutex_unlock(&local->mtx);
4647         return ret;
4648 }
4649
4650 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4651                                      struct cfg80211_bss *cbss, bool assoc,
4652                                      bool override)
4653 {
4654         struct ieee80211_local *local = sdata->local;
4655         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4656         struct ieee80211_bss *bss = (void *)cbss->priv;
4657         struct sta_info *new_sta = NULL;
4658         struct ieee80211_supported_band *sband;
4659         bool have_sta = false;
4660         int err;
4661
4662         sband = local->hw.wiphy->bands[cbss->channel->band];
4663
4664         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4665                 return -EINVAL;
4666
4667         /* If a reconfig is happening, bail out */
4668         if (local->in_reconfig)
4669                 return -EBUSY;
4670
4671         if (assoc) {
4672                 rcu_read_lock();
4673                 have_sta = sta_info_get(sdata, cbss->bssid);
4674                 rcu_read_unlock();
4675         }
4676
4677         if (!have_sta) {
4678                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4679                 if (!new_sta)
4680                         return -ENOMEM;
4681         }
4682
4683         /*
4684          * Set up the information for the new channel before setting the
4685          * new channel. We can't - completely race-free - change the basic
4686          * rates bitmap and the channel (sband) that it refers to, but if
4687          * we set it up before we at least avoid calling into the driver's
4688          * bss_info_changed() method with invalid information (since we do
4689          * call that from changing the channel - only for IDLE and perhaps
4690          * some others, but ...).
4691          *
4692          * So to avoid that, just set up all the new information before the
4693          * channel, but tell the driver to apply it only afterwards, since
4694          * it might need the new channel for that.
4695          */
4696         if (new_sta) {
4697                 u32 rates = 0, basic_rates = 0;
4698                 bool have_higher_than_11mbit;
4699                 int min_rate = INT_MAX, min_rate_index = -1;
4700                 const struct cfg80211_bss_ies *ies;
4701                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4702
4703                 ieee80211_get_rates(sband, bss->supp_rates,
4704                                     bss->supp_rates_len,
4705                                     &rates, &basic_rates,
4706                                     &have_higher_than_11mbit,
4707                                     &min_rate, &min_rate_index,
4708                                     shift);
4709
4710                 /*
4711                  * This used to be a workaround for basic rates missing
4712                  * in the association response frame. Now that we no
4713                  * longer use the basic rates from there, it probably
4714                  * doesn't happen any more, but keep the workaround so
4715                  * in case some *other* APs are buggy in different ways
4716                  * we can connect -- with a warning.
4717                  */
4718                 if (!basic_rates && min_rate_index >= 0) {
4719                         sdata_info(sdata,
4720                                    "No basic rates, using min rate instead\n");
4721                         basic_rates = BIT(min_rate_index);
4722                 }
4723
4724                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4725                 sdata->vif.bss_conf.basic_rates = basic_rates;
4726
4727                 /* cf. IEEE 802.11 9.2.12 */
4728                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4729                     have_higher_than_11mbit)
4730                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4731                 else
4732                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4733
4734                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4735
4736                 /* set timing information */
4737                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4738                 rcu_read_lock();
4739                 ies = rcu_dereference(cbss->beacon_ies);
4740                 if (ies) {
4741                         const u8 *tim_ie;
4742
4743                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4744                         sdata->vif.bss_conf.sync_device_ts =
4745                                 bss->device_ts_beacon;
4746                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4747                                                   ies->data, ies->len);
4748                         if (tim_ie && tim_ie[1] >= 2)
4749                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4750                         else
4751                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4752                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4753                                                TIMING_BEACON_ONLY)) {
4754                         ies = rcu_dereference(cbss->proberesp_ies);
4755                         /* must be non-NULL since beacon IEs were NULL */
4756                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4757                         sdata->vif.bss_conf.sync_device_ts =
4758                                 bss->device_ts_presp;
4759                         sdata->vif.bss_conf.sync_dtim_count = 0;
4760                 } else {
4761                         sdata->vif.bss_conf.sync_tsf = 0;
4762                         sdata->vif.bss_conf.sync_device_ts = 0;
4763                         sdata->vif.bss_conf.sync_dtim_count = 0;
4764                 }
4765                 rcu_read_unlock();
4766         }
4767
4768         if (new_sta || override) {
4769                 err = ieee80211_prep_channel(sdata, cbss);
4770                 if (err) {
4771                         if (new_sta)
4772                                 sta_info_free(local, new_sta);
4773                         return -EINVAL;
4774                 }
4775         }
4776
4777         if (new_sta) {
4778                 /*
4779                  * tell driver about BSSID, basic rates and timing
4780                  * this was set up above, before setting the channel
4781                  */
4782                 ieee80211_bss_info_change_notify(sdata,
4783                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4784                         BSS_CHANGED_BEACON_INT);
4785
4786                 if (assoc)
4787                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4788
4789                 err = sta_info_insert(new_sta);
4790                 new_sta = NULL;
4791                 if (err) {
4792                         sdata_info(sdata,
4793                                    "failed to insert STA entry for the AP (error %d)\n",
4794                                    err);
4795                         return err;
4796                 }
4797         } else
4798                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4799
4800         /* Cancel scan to ensure that nothing interferes with connection */
4801         if (local->scanning)
4802                 ieee80211_scan_cancel(local);
4803
4804         return 0;
4805 }
4806
4807 /* config hooks */
4808 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4809                        struct cfg80211_auth_request *req)
4810 {
4811         struct ieee80211_local *local = sdata->local;
4812         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4813         struct ieee80211_mgd_auth_data *auth_data;
4814         u16 auth_alg;
4815         int err;
4816
4817         /* prepare auth data structure */
4818
4819         switch (req->auth_type) {
4820         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4821                 auth_alg = WLAN_AUTH_OPEN;
4822                 break;
4823         case NL80211_AUTHTYPE_SHARED_KEY:
4824                 if (IS_ERR(local->wep_tx_tfm))
4825                         return -EOPNOTSUPP;
4826                 auth_alg = WLAN_AUTH_SHARED_KEY;
4827                 break;
4828         case NL80211_AUTHTYPE_FT:
4829                 auth_alg = WLAN_AUTH_FT;
4830                 break;
4831         case NL80211_AUTHTYPE_NETWORK_EAP:
4832                 auth_alg = WLAN_AUTH_LEAP;
4833                 break;
4834         case NL80211_AUTHTYPE_SAE:
4835                 auth_alg = WLAN_AUTH_SAE;
4836                 break;
4837         case NL80211_AUTHTYPE_FILS_SK:
4838                 auth_alg = WLAN_AUTH_FILS_SK;
4839                 break;
4840         case NL80211_AUTHTYPE_FILS_SK_PFS:
4841                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4842                 break;
4843         case NL80211_AUTHTYPE_FILS_PK:
4844                 auth_alg = WLAN_AUTH_FILS_PK;
4845                 break;
4846         default:
4847                 return -EOPNOTSUPP;
4848         }
4849
4850         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4851                             req->ie_len, GFP_KERNEL);
4852         if (!auth_data)
4853                 return -ENOMEM;
4854
4855         auth_data->bss = req->bss;
4856
4857         if (req->auth_data_len >= 4) {
4858                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4859                         __le16 *pos = (__le16 *) req->auth_data;
4860
4861                         auth_data->sae_trans = le16_to_cpu(pos[0]);
4862                         auth_data->sae_status = le16_to_cpu(pos[1]);
4863                 }
4864                 memcpy(auth_data->data, req->auth_data + 4,
4865                        req->auth_data_len - 4);
4866                 auth_data->data_len += req->auth_data_len - 4;
4867         }
4868
4869         if (req->ie && req->ie_len) {
4870                 memcpy(&auth_data->data[auth_data->data_len],
4871                        req->ie, req->ie_len);
4872                 auth_data->data_len += req->ie_len;
4873         }
4874
4875         if (req->key && req->key_len) {
4876                 auth_data->key_len = req->key_len;
4877                 auth_data->key_idx = req->key_idx;
4878                 memcpy(auth_data->key, req->key, req->key_len);
4879         }
4880
4881         auth_data->algorithm = auth_alg;
4882
4883         /* try to authenticate/probe */
4884
4885         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4886             ifmgd->assoc_data) {
4887                 err = -EBUSY;
4888                 goto err_free;
4889         }
4890
4891         if (ifmgd->auth_data)
4892                 ieee80211_destroy_auth_data(sdata, false);
4893
4894         /* prep auth_data so we don't go into idle on disassoc */
4895         ifmgd->auth_data = auth_data;
4896
4897         if (ifmgd->associated) {
4898                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4899
4900                 sdata_info(sdata,
4901                            "disconnect from AP %pM for new auth to %pM\n",
4902                            ifmgd->associated->bssid, req->bss->bssid);
4903                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4904                                        WLAN_REASON_UNSPECIFIED,
4905                                        false, frame_buf);
4906
4907                 ieee80211_report_disconnect(sdata, frame_buf,
4908                                             sizeof(frame_buf), true,
4909                                             WLAN_REASON_UNSPECIFIED);
4910         }
4911
4912         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4913
4914         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4915         if (err)
4916                 goto err_clear;
4917
4918         err = ieee80211_auth(sdata);
4919         if (err) {
4920                 sta_info_destroy_addr(sdata, req->bss->bssid);
4921                 goto err_clear;
4922         }
4923
4924         /* hold our own reference */
4925         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4926         return 0;
4927
4928  err_clear:
4929         eth_zero_addr(ifmgd->bssid);
4930         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4931         ifmgd->auth_data = NULL;
4932         mutex_lock(&sdata->local->mtx);
4933         ieee80211_vif_release_channel(sdata);
4934         mutex_unlock(&sdata->local->mtx);
4935  err_free:
4936         kfree(auth_data);
4937         return err;
4938 }
4939
4940 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4941                         struct cfg80211_assoc_request *req)
4942 {
4943         struct ieee80211_local *local = sdata->local;
4944         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4945         struct ieee80211_bss *bss = (void *)req->bss->priv;
4946         struct ieee80211_mgd_assoc_data *assoc_data;
4947         const struct cfg80211_bss_ies *beacon_ies;
4948         struct ieee80211_supported_band *sband;
4949         const u8 *ssidie, *ht_ie, *vht_ie;
4950         int i, err;
4951         bool override = false;
4952
4953         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4954         if (!assoc_data)
4955                 return -ENOMEM;
4956
4957         rcu_read_lock();
4958         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4959         if (!ssidie) {
4960                 rcu_read_unlock();
4961                 kfree(assoc_data);
4962                 return -EINVAL;
4963         }
4964         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4965         assoc_data->ssid_len = ssidie[1];
4966         rcu_read_unlock();
4967
4968         if (ifmgd->associated) {
4969                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4970
4971                 sdata_info(sdata,
4972                            "disconnect from AP %pM for new assoc to %pM\n",
4973                            ifmgd->associated->bssid, req->bss->bssid);
4974                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4975                                        WLAN_REASON_UNSPECIFIED,
4976                                        false, frame_buf);
4977
4978                 ieee80211_report_disconnect(sdata, frame_buf,
4979                                             sizeof(frame_buf), true,
4980                                             WLAN_REASON_UNSPECIFIED);
4981         }
4982
4983         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4984                 err = -EBUSY;
4985                 goto err_free;
4986         }
4987
4988         if (ifmgd->assoc_data) {
4989                 err = -EBUSY;
4990                 goto err_free;
4991         }
4992
4993         if (ifmgd->auth_data) {
4994                 bool match;
4995
4996                 /* keep sta info, bssid if matching */
4997                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4998                 ieee80211_destroy_auth_data(sdata, match);
4999         }
5000
5001         /* prepare assoc data */
5002
5003         ifmgd->beacon_crc_valid = false;
5004
5005         assoc_data->wmm = bss->wmm_used &&
5006                           (local->hw.queues >= IEEE80211_NUM_ACS);
5007
5008         /*
5009          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5010          * We still associate in non-HT mode (11a/b/g) if any one of these
5011          * ciphers is configured as pairwise.
5012          * We can set this to true for non-11n hardware, that'll be checked
5013          * separately along with the peer capabilities.
5014          */
5015         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5016                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5017                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5018                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5019                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5020                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5021                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5022                         netdev_info(sdata->dev,
5023                                     "disabling HE/HT/VHT due to WEP/TKIP use\n");
5024                 }
5025         }
5026
5027         /* Also disable HT if we don't support it or the AP doesn't use WMM */
5028         sband = local->hw.wiphy->bands[req->bss->channel->band];
5029         if (!sband->ht_cap.ht_supported ||
5030             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5031             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5032                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5033                 if (!bss->wmm_used &&
5034                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5035                         netdev_info(sdata->dev,
5036                                     "disabling HT as WMM/QoS is not supported by the AP\n");
5037         }
5038
5039         /* disable VHT if we don't support it or the AP doesn't use WMM */
5040         if (!sband->vht_cap.vht_supported ||
5041             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5042             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5043                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5044                 if (!bss->wmm_used &&
5045                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5046                         netdev_info(sdata->dev,
5047                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
5048         }
5049
5050         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5051         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5052                sizeof(ifmgd->ht_capa_mask));
5053
5054         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5055         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5056                sizeof(ifmgd->vht_capa_mask));
5057
5058         if (req->ie && req->ie_len) {
5059                 memcpy(assoc_data->ie, req->ie, req->ie_len);
5060                 assoc_data->ie_len = req->ie_len;
5061         }
5062
5063         if (req->fils_kek) {
5064                 /* should already be checked in cfg80211 - so warn */
5065                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5066                         err = -EINVAL;
5067                         goto err_free;
5068                 }
5069                 memcpy(assoc_data->fils_kek, req->fils_kek,
5070                        req->fils_kek_len);
5071                 assoc_data->fils_kek_len = req->fils_kek_len;
5072         }
5073
5074         if (req->fils_nonces)
5075                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5076                        2 * FILS_NONCE_LEN);
5077
5078         assoc_data->bss = req->bss;
5079
5080         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5081                 if (ifmgd->powersave)
5082                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5083                 else
5084                         sdata->smps_mode = IEEE80211_SMPS_OFF;
5085         } else
5086                 sdata->smps_mode = ifmgd->req_smps;
5087
5088         assoc_data->capability = req->bss->capability;
5089         assoc_data->supp_rates = bss->supp_rates;
5090         assoc_data->supp_rates_len = bss->supp_rates_len;
5091
5092         rcu_read_lock();
5093         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5094         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5095                 assoc_data->ap_ht_param =
5096                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5097         else
5098                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5099         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5100         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5101                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5102                        sizeof(struct ieee80211_vht_cap));
5103         else
5104                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5105         rcu_read_unlock();
5106
5107         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5108                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5109              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5110                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5111
5112         if (bss->wmm_used && bss->uapsd_supported &&
5113             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5114                 assoc_data->uapsd = true;
5115                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5116         } else {
5117                 assoc_data->uapsd = false;
5118                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5119         }
5120
5121         if (req->prev_bssid)
5122                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5123
5124         if (req->use_mfp) {
5125                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5126                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5127         } else {
5128                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5129                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5130         }
5131
5132         if (req->flags & ASSOC_REQ_USE_RRM)
5133                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5134         else
5135                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5136
5137         if (req->crypto.control_port)
5138                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5139         else
5140                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5141
5142         sdata->control_port_protocol = req->crypto.control_port_ethertype;
5143         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5144         sdata->control_port_over_nl80211 =
5145                                         req->crypto.control_port_over_nl80211;
5146         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5147                                                         sdata->vif.type);
5148
5149         /* kick off associate process */
5150
5151         ifmgd->assoc_data = assoc_data;
5152         ifmgd->dtim_period = 0;
5153         ifmgd->have_beacon = false;
5154
5155         /* override HT/VHT configuration only if the AP and we support it */
5156         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5157                 struct ieee80211_sta_ht_cap sta_ht_cap;
5158
5159                 if (req->flags & ASSOC_REQ_DISABLE_HT)
5160                         override = true;
5161
5162                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5163                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5164
5165                 /* check for 40 MHz disable override */
5166                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5167                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5168                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5169                         override = true;
5170
5171                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5172                     req->flags & ASSOC_REQ_DISABLE_VHT)
5173                         override = true;
5174         }
5175
5176         if (req->flags & ASSOC_REQ_DISABLE_HT) {
5177                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5178                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5179         }
5180
5181         if (req->flags & ASSOC_REQ_DISABLE_VHT)
5182                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5183
5184         err = ieee80211_prep_connection(sdata, req->bss, true, override);
5185         if (err)
5186                 goto err_clear;
5187
5188         rcu_read_lock();
5189         beacon_ies = rcu_dereference(req->bss->beacon_ies);
5190
5191         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5192             !beacon_ies) {
5193                 /*
5194                  * Wait up to one beacon interval ...
5195                  * should this be more if we miss one?
5196                  */
5197                 sdata_info(sdata, "waiting for beacon from %pM\n",
5198                            ifmgd->bssid);
5199                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5200                 assoc_data->timeout_started = true;
5201                 assoc_data->need_beacon = true;
5202         } else if (beacon_ies) {
5203                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
5204                                                     beacon_ies->data,
5205                                                     beacon_ies->len);
5206                 u8 dtim_count = 0;
5207
5208                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
5209                         const struct ieee80211_tim_ie *tim;
5210                         tim = (void *)(tim_ie + 2);
5211                         ifmgd->dtim_period = tim->dtim_period;
5212                         dtim_count = tim->dtim_count;
5213                 }
5214                 ifmgd->have_beacon = true;
5215                 assoc_data->timeout = jiffies;
5216                 assoc_data->timeout_started = true;
5217
5218                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5219                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5220                         sdata->vif.bss_conf.sync_device_ts =
5221                                 bss->device_ts_beacon;
5222                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5223                 }
5224         } else {
5225                 assoc_data->timeout = jiffies;
5226                 assoc_data->timeout_started = true;
5227         }
5228         rcu_read_unlock();
5229
5230         run_again(sdata, assoc_data->timeout);
5231
5232         if (bss->corrupt_data) {
5233                 char *corrupt_type = "data";
5234                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5235                         if (bss->corrupt_data &
5236                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
5237                                 corrupt_type = "beacon and probe response";
5238                         else
5239                                 corrupt_type = "beacon";
5240                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5241                         corrupt_type = "probe response";
5242                 sdata_info(sdata, "associating with AP with corrupt %s\n",
5243                            corrupt_type);
5244         }
5245
5246         return 0;
5247  err_clear:
5248         eth_zero_addr(ifmgd->bssid);
5249         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5250         ifmgd->assoc_data = NULL;
5251  err_free:
5252         kfree(assoc_data);
5253         return err;
5254 }
5255
5256 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5257                          struct cfg80211_deauth_request *req)
5258 {
5259         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5260         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5261         bool tx = !req->local_state_change;
5262
5263         if (ifmgd->auth_data &&
5264             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5265                 sdata_info(sdata,
5266                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5267                            req->bssid, req->reason_code,
5268                            ieee80211_get_reason_code_string(req->reason_code));
5269
5270                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5271                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5272                                                IEEE80211_STYPE_DEAUTH,
5273                                                req->reason_code, tx,
5274                                                frame_buf);
5275                 ieee80211_destroy_auth_data(sdata, false);
5276                 ieee80211_report_disconnect(sdata, frame_buf,
5277                                             sizeof(frame_buf), true,
5278                                             req->reason_code);
5279
5280                 return 0;
5281         }
5282
5283         if (ifmgd->assoc_data &&
5284             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5285                 sdata_info(sdata,
5286                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
5287                            req->bssid, req->reason_code,
5288                            ieee80211_get_reason_code_string(req->reason_code));
5289
5290                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5291                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5292                                                IEEE80211_STYPE_DEAUTH,
5293                                                req->reason_code, tx,
5294                                                frame_buf);
5295                 ieee80211_destroy_assoc_data(sdata, false, true);
5296                 ieee80211_report_disconnect(sdata, frame_buf,
5297                                             sizeof(frame_buf), true,
5298                                             req->reason_code);
5299                 return 0;
5300         }
5301
5302         if (ifmgd->associated &&
5303             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5304                 sdata_info(sdata,
5305                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5306                            req->bssid, req->reason_code,
5307                            ieee80211_get_reason_code_string(req->reason_code));
5308
5309                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5310                                        req->reason_code, tx, frame_buf);
5311                 ieee80211_report_disconnect(sdata, frame_buf,
5312                                             sizeof(frame_buf), true,
5313                                             req->reason_code);
5314                 return 0;
5315         }
5316
5317         return -ENOTCONN;
5318 }
5319
5320 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5321                            struct cfg80211_disassoc_request *req)
5322 {
5323         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5324         u8 bssid[ETH_ALEN];
5325         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5326
5327         /*
5328          * cfg80211 should catch this ... but it's racy since
5329          * we can receive a disassoc frame, process it, hand it
5330          * to cfg80211 while that's in a locked section already
5331          * trying to tell us that the user wants to disconnect.
5332          */
5333         if (ifmgd->associated != req->bss)
5334                 return -ENOLINK;
5335
5336         sdata_info(sdata,
5337                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5338                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5339
5340         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5341         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5342                                req->reason_code, !req->local_state_change,
5343                                frame_buf);
5344
5345         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5346                                     req->reason_code);
5347
5348         return 0;
5349 }
5350
5351 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5352 {
5353         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5354
5355         /*
5356          * Make sure some work items will not run after this,
5357          * they will not do anything but might not have been
5358          * cancelled when disconnecting.
5359          */
5360         cancel_work_sync(&ifmgd->monitor_work);
5361         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5362         cancel_work_sync(&ifmgd->request_smps_work);
5363         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5364         cancel_work_sync(&ifmgd->chswitch_work);
5365         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5366
5367         sdata_lock(sdata);
5368         if (ifmgd->assoc_data) {
5369                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5370                 ieee80211_destroy_assoc_data(sdata, false, false);
5371                 cfg80211_assoc_timeout(sdata->dev, bss);
5372         }
5373         if (ifmgd->auth_data)
5374                 ieee80211_destroy_auth_data(sdata, false);
5375         spin_lock_bh(&ifmgd->teardown_lock);
5376         if (ifmgd->teardown_skb) {
5377                 kfree_skb(ifmgd->teardown_skb);
5378                 ifmgd->teardown_skb = NULL;
5379                 ifmgd->orig_teardown_skb = NULL;
5380         }
5381         spin_unlock_bh(&ifmgd->teardown_lock);
5382         del_timer_sync(&ifmgd->timer);
5383         sdata_unlock(sdata);
5384 }
5385
5386 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5387                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5388                                s32 rssi_level,
5389                                gfp_t gfp)
5390 {
5391         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5392
5393         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5394
5395         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5396 }
5397 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5398
5399 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5400 {
5401         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5402
5403         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5404
5405         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5406 }
5407 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);